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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * Security plug functions | |
4 | * | |
5 | * Copyright (C) 2001 WireX Communications, Inc <chris@wirex.com> | |
6 | * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com> | |
7 | * Copyright (C) 2001 Networks Associates Technology, Inc <ssmalley@nai.com> | |
d291f1a6 | 8 | * Copyright (C) 2016 Mellanox Technologies |
1661372c | 9 | * Copyright (C) 2023 Microsoft Corporation <paul@paul-moore.com> |
1da177e4 LT |
10 | */ |
11 | ||
9b8c7c14 KC |
12 | #define pr_fmt(fmt) "LSM: " fmt |
13 | ||
afdb09c7 | 14 | #include <linux/bpf.h> |
c59ede7b | 15 | #include <linux/capability.h> |
d47be3df | 16 | #include <linux/dcache.h> |
876979c9 | 17 | #include <linux/export.h> |
1da177e4 LT |
18 | #include <linux/init.h> |
19 | #include <linux/kernel.h> | |
b89999d0 | 20 | #include <linux/kernel_read_file.h> |
3c4ed7bd | 21 | #include <linux/lsm_hooks.h> |
f381c272 | 22 | #include <linux/integrity.h> |
6c21a7fb | 23 | #include <linux/ima.h> |
3e1be52d | 24 | #include <linux/evm.h> |
40401530 | 25 | #include <linux/fsnotify.h> |
8b3ec681 AV |
26 | #include <linux/mman.h> |
27 | #include <linux/mount.h> | |
28 | #include <linux/personality.h> | |
75331a59 | 29 | #include <linux/backing-dev.h> |
3bb857e4 | 30 | #include <linux/string.h> |
ecd5f82e | 31 | #include <linux/msg.h> |
40401530 | 32 | #include <net/flow.h> |
1da177e4 | 33 | |
823eb1cc | 34 | #define MAX_LSM_EVM_XATTR 2 |
1da177e4 | 35 | |
2d4d5119 KC |
36 | /* How many LSMs were built into the kernel? */ |
37 | #define LSM_COUNT (__end_lsm_info - __start_lsm_info) | |
38 | ||
59438b46 SS |
39 | /* |
40 | * These are descriptions of the reasons that can be passed to the | |
41 | * security_locked_down() LSM hook. Placing this array here allows | |
42 | * all security modules to use the same descriptions for auditing | |
43 | * purposes. | |
44 | */ | |
45 | const char *const lockdown_reasons[LOCKDOWN_CONFIDENTIALITY_MAX+1] = { | |
46 | [LOCKDOWN_NONE] = "none", | |
47 | [LOCKDOWN_MODULE_SIGNATURE] = "unsigned module loading", | |
48 | [LOCKDOWN_DEV_MEM] = "/dev/mem,kmem,port", | |
49 | [LOCKDOWN_EFI_TEST] = "/dev/efi_test access", | |
50 | [LOCKDOWN_KEXEC] = "kexec of unsigned images", | |
51 | [LOCKDOWN_HIBERNATION] = "hibernation", | |
52 | [LOCKDOWN_PCI_ACCESS] = "direct PCI access", | |
53 | [LOCKDOWN_IOPORT] = "raw io port access", | |
54 | [LOCKDOWN_MSR] = "raw MSR access", | |
55 | [LOCKDOWN_ACPI_TABLES] = "modifying ACPI tables", | |
99df7a28 | 56 | [LOCKDOWN_DEVICE_TREE] = "modifying device tree contents", |
59438b46 SS |
57 | [LOCKDOWN_PCMCIA_CIS] = "direct PCMCIA CIS storage", |
58 | [LOCKDOWN_TIOCSSERIAL] = "reconfiguration of serial port IO", | |
59 | [LOCKDOWN_MODULE_PARAMETERS] = "unsafe module parameters", | |
60 | [LOCKDOWN_MMIOTRACE] = "unsafe mmio", | |
61 | [LOCKDOWN_DEBUGFS] = "debugfs access", | |
62 | [LOCKDOWN_XMON_WR] = "xmon write access", | |
51e1bb9e | 63 | [LOCKDOWN_BPF_WRITE_USER] = "use of bpf to write user RAM", |
eadb2f47 | 64 | [LOCKDOWN_DBG_WRITE_KERNEL] = "use of kgdb/kdb to write kernel RAM", |
b8f3e488 | 65 | [LOCKDOWN_RTAS_ERROR_INJECTION] = "RTAS error injection", |
59438b46 SS |
66 | [LOCKDOWN_INTEGRITY_MAX] = "integrity", |
67 | [LOCKDOWN_KCORE] = "/proc/kcore access", | |
68 | [LOCKDOWN_KPROBES] = "use of kprobes", | |
71330842 | 69 | [LOCKDOWN_BPF_READ_KERNEL] = "use of bpf to read kernel RAM", |
eadb2f47 | 70 | [LOCKDOWN_DBG_READ_KERNEL] = "use of kgdb/kdb to read kernel RAM", |
59438b46 SS |
71 | [LOCKDOWN_PERF] = "unsafe use of perf", |
72 | [LOCKDOWN_TRACEFS] = "use of tracefs", | |
73 | [LOCKDOWN_XMON_RW] = "xmon read and write access", | |
c7a5899e | 74 | [LOCKDOWN_XFRM_SECRET] = "xfrm SA secret", |
59438b46 SS |
75 | [LOCKDOWN_CONFIDENTIALITY_MAX] = "confidentiality", |
76 | }; | |
77 | ||
3dfc9b02 | 78 | struct security_hook_heads security_hook_heads __lsm_ro_after_init; |
42df744c | 79 | static BLOCKING_NOTIFIER_HEAD(blocking_lsm_notifier_chain); |
8f408ab6 | 80 | |
33bf60ca | 81 | static struct kmem_cache *lsm_file_cache; |
afb1cbe3 | 82 | static struct kmem_cache *lsm_inode_cache; |
33bf60ca | 83 | |
d69dece5 | 84 | char *lsm_names; |
bbd3662a CS |
85 | static struct lsm_blob_sizes blob_sizes __lsm_ro_after_init; |
86 | ||
076c54c5 | 87 | /* Boot-time LSM user choice */ |
79f7865d | 88 | static __initdata const char *chosen_lsm_order; |
5ef4e419 | 89 | static __initdata const char *chosen_major_lsm; |
1da177e4 | 90 | |
13e735c0 KC |
91 | static __initconst const char * const builtin_lsm_order = CONFIG_LSM; |
92 | ||
2d4d5119 KC |
93 | /* Ordered list of LSMs to initialize. */ |
94 | static __initdata struct lsm_info **ordered_lsms; | |
14bd99c8 | 95 | static __initdata struct lsm_info *exclusive; |
2d4d5119 | 96 | |
9b8c7c14 KC |
97 | static __initdata bool debug; |
98 | #define init_debug(...) \ | |
99 | do { \ | |
100 | if (debug) \ | |
101 | pr_info(__VA_ARGS__); \ | |
102 | } while (0) | |
103 | ||
f4941d75 KC |
104 | static bool __init is_enabled(struct lsm_info *lsm) |
105 | { | |
a8027fb0 KC |
106 | if (!lsm->enabled) |
107 | return false; | |
f4941d75 | 108 | |
a8027fb0 | 109 | return *lsm->enabled; |
f4941d75 KC |
110 | } |
111 | ||
112 | /* Mark an LSM's enabled flag. */ | |
113 | static int lsm_enabled_true __initdata = 1; | |
114 | static int lsm_enabled_false __initdata = 0; | |
115 | static void __init set_enabled(struct lsm_info *lsm, bool enabled) | |
116 | { | |
117 | /* | |
118 | * When an LSM hasn't configured an enable variable, we can use | |
119 | * a hard-coded location for storing the default enabled state. | |
120 | */ | |
121 | if (!lsm->enabled) { | |
122 | if (enabled) | |
123 | lsm->enabled = &lsm_enabled_true; | |
124 | else | |
125 | lsm->enabled = &lsm_enabled_false; | |
126 | } else if (lsm->enabled == &lsm_enabled_true) { | |
127 | if (!enabled) | |
128 | lsm->enabled = &lsm_enabled_false; | |
129 | } else if (lsm->enabled == &lsm_enabled_false) { | |
130 | if (enabled) | |
131 | lsm->enabled = &lsm_enabled_true; | |
132 | } else { | |
133 | *lsm->enabled = enabled; | |
134 | } | |
135 | } | |
136 | ||
2d4d5119 KC |
137 | /* Is an LSM already listed in the ordered LSMs list? */ |
138 | static bool __init exists_ordered_lsm(struct lsm_info *lsm) | |
139 | { | |
140 | struct lsm_info **check; | |
141 | ||
142 | for (check = ordered_lsms; *check; check++) | |
143 | if (*check == lsm) | |
144 | return true; | |
145 | ||
146 | return false; | |
147 | } | |
148 | ||
149 | /* Append an LSM to the list of ordered LSMs to initialize. */ | |
150 | static int last_lsm __initdata; | |
151 | static void __init append_ordered_lsm(struct lsm_info *lsm, const char *from) | |
152 | { | |
153 | /* Ignore duplicate selections. */ | |
154 | if (exists_ordered_lsm(lsm)) | |
155 | return; | |
156 | ||
157 | if (WARN(last_lsm == LSM_COUNT, "%s: out of LSM slots!?\n", from)) | |
158 | return; | |
159 | ||
a8027fb0 KC |
160 | /* Enable this LSM, if it is not already set. */ |
161 | if (!lsm->enabled) | |
162 | lsm->enabled = &lsm_enabled_true; | |
2d4d5119 | 163 | ordered_lsms[last_lsm++] = lsm; |
a8027fb0 | 164 | |
86ef3c73 KC |
165 | init_debug("%s ordered: %s (%s)\n", from, lsm->name, |
166 | is_enabled(lsm) ? "enabled" : "disabled"); | |
2d4d5119 KC |
167 | } |
168 | ||
f4941d75 KC |
169 | /* Is an LSM allowed to be initialized? */ |
170 | static bool __init lsm_allowed(struct lsm_info *lsm) | |
171 | { | |
172 | /* Skip if the LSM is disabled. */ | |
173 | if (!is_enabled(lsm)) | |
174 | return false; | |
175 | ||
14bd99c8 KC |
176 | /* Not allowed if another exclusive LSM already initialized. */ |
177 | if ((lsm->flags & LSM_FLAG_EXCLUSIVE) && exclusive) { | |
178 | init_debug("exclusive disabled: %s\n", lsm->name); | |
179 | return false; | |
180 | } | |
181 | ||
f4941d75 KC |
182 | return true; |
183 | } | |
184 | ||
bbd3662a CS |
185 | static void __init lsm_set_blob_size(int *need, int *lbs) |
186 | { | |
187 | int offset; | |
188 | ||
b9f5ce27 GN |
189 | if (*need <= 0) |
190 | return; | |
191 | ||
192 | offset = ALIGN(*lbs, sizeof(void *)); | |
193 | *lbs = offset + *need; | |
194 | *need = offset; | |
bbd3662a CS |
195 | } |
196 | ||
197 | static void __init lsm_set_blob_sizes(struct lsm_blob_sizes *needed) | |
198 | { | |
199 | if (!needed) | |
200 | return; | |
201 | ||
202 | lsm_set_blob_size(&needed->lbs_cred, &blob_sizes.lbs_cred); | |
33bf60ca | 203 | lsm_set_blob_size(&needed->lbs_file, &blob_sizes.lbs_file); |
afb1cbe3 CS |
204 | /* |
205 | * The inode blob gets an rcu_head in addition to | |
206 | * what the modules might need. | |
207 | */ | |
208 | if (needed->lbs_inode && blob_sizes.lbs_inode == 0) | |
209 | blob_sizes.lbs_inode = sizeof(struct rcu_head); | |
210 | lsm_set_blob_size(&needed->lbs_inode, &blob_sizes.lbs_inode); | |
ecd5f82e CS |
211 | lsm_set_blob_size(&needed->lbs_ipc, &blob_sizes.lbs_ipc); |
212 | lsm_set_blob_size(&needed->lbs_msg_msg, &blob_sizes.lbs_msg_msg); | |
1aea7808 | 213 | lsm_set_blob_size(&needed->lbs_superblock, &blob_sizes.lbs_superblock); |
f4ad8f2c | 214 | lsm_set_blob_size(&needed->lbs_task, &blob_sizes.lbs_task); |
bbd3662a CS |
215 | } |
216 | ||
d8e9bbd4 KC |
217 | /* Prepare LSM for initialization. */ |
218 | static void __init prepare_lsm(struct lsm_info *lsm) | |
f4941d75 KC |
219 | { |
220 | int enabled = lsm_allowed(lsm); | |
221 | ||
222 | /* Record enablement (to handle any following exclusive LSMs). */ | |
223 | set_enabled(lsm, enabled); | |
224 | ||
d8e9bbd4 | 225 | /* If enabled, do pre-initialization work. */ |
f4941d75 | 226 | if (enabled) { |
14bd99c8 KC |
227 | if ((lsm->flags & LSM_FLAG_EXCLUSIVE) && !exclusive) { |
228 | exclusive = lsm; | |
86ef3c73 | 229 | init_debug("exclusive chosen: %s\n", lsm->name); |
14bd99c8 | 230 | } |
bbd3662a CS |
231 | |
232 | lsm_set_blob_sizes(lsm->blobs); | |
d8e9bbd4 KC |
233 | } |
234 | } | |
235 | ||
236 | /* Initialize a given LSM, if it is enabled. */ | |
237 | static void __init initialize_lsm(struct lsm_info *lsm) | |
238 | { | |
239 | if (is_enabled(lsm)) { | |
240 | int ret; | |
14bd99c8 | 241 | |
f4941d75 KC |
242 | init_debug("initializing %s\n", lsm->name); |
243 | ret = lsm->init(); | |
244 | WARN(ret, "%s failed to initialize: %d\n", lsm->name, ret); | |
245 | } | |
246 | } | |
247 | ||
13e735c0 | 248 | /* Populate ordered LSMs list from comma-separated LSM name list. */ |
2d4d5119 | 249 | static void __init ordered_lsm_parse(const char *order, const char *origin) |
657d910b KC |
250 | { |
251 | struct lsm_info *lsm; | |
13e735c0 KC |
252 | char *sep, *name, *next; |
253 | ||
e2bc445b KC |
254 | /* LSM_ORDER_FIRST is always first. */ |
255 | for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) { | |
256 | if (lsm->order == LSM_ORDER_FIRST) | |
86ef3c73 | 257 | append_ordered_lsm(lsm, " first"); |
e2bc445b KC |
258 | } |
259 | ||
7e611486 | 260 | /* Process "security=", if given. */ |
7e611486 KC |
261 | if (chosen_major_lsm) { |
262 | struct lsm_info *major; | |
263 | ||
264 | /* | |
265 | * To match the original "security=" behavior, this | |
266 | * explicitly does NOT fallback to another Legacy Major | |
267 | * if the selected one was separately disabled: disable | |
268 | * all non-matching Legacy Major LSMs. | |
269 | */ | |
270 | for (major = __start_lsm_info; major < __end_lsm_info; | |
271 | major++) { | |
272 | if ((major->flags & LSM_FLAG_LEGACY_MAJOR) && | |
273 | strcmp(major->name, chosen_major_lsm) != 0) { | |
274 | set_enabled(major, false); | |
86ef3c73 | 275 | init_debug("security=%s disabled: %s (only one legacy major LSM)\n", |
7e611486 KC |
276 | chosen_major_lsm, major->name); |
277 | } | |
278 | } | |
279 | } | |
5ef4e419 | 280 | |
13e735c0 KC |
281 | sep = kstrdup(order, GFP_KERNEL); |
282 | next = sep; | |
283 | /* Walk the list, looking for matching LSMs. */ | |
284 | while ((name = strsep(&next, ",")) != NULL) { | |
285 | bool found = false; | |
286 | ||
287 | for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) { | |
e2bc445b KC |
288 | if (lsm->order == LSM_ORDER_MUTABLE && |
289 | strcmp(lsm->name, name) == 0) { | |
13e735c0 KC |
290 | append_ordered_lsm(lsm, origin); |
291 | found = true; | |
292 | } | |
293 | } | |
294 | ||
295 | if (!found) | |
86ef3c73 KC |
296 | init_debug("%s ignored: %s (not built into kernel)\n", |
297 | origin, name); | |
657d910b | 298 | } |
c91d8106 CS |
299 | |
300 | /* Process "security=", if given. */ | |
301 | if (chosen_major_lsm) { | |
302 | for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) { | |
303 | if (exists_ordered_lsm(lsm)) | |
304 | continue; | |
305 | if (strcmp(lsm->name, chosen_major_lsm) == 0) | |
306 | append_ordered_lsm(lsm, "security="); | |
307 | } | |
308 | } | |
309 | ||
310 | /* Disable all LSMs not in the ordered list. */ | |
311 | for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) { | |
312 | if (exists_ordered_lsm(lsm)) | |
313 | continue; | |
314 | set_enabled(lsm, false); | |
86ef3c73 KC |
315 | init_debug("%s skipped: %s (not in requested order)\n", |
316 | origin, lsm->name); | |
c91d8106 CS |
317 | } |
318 | ||
13e735c0 | 319 | kfree(sep); |
657d910b KC |
320 | } |
321 | ||
1cfb2a51 TH |
322 | static void __init lsm_early_cred(struct cred *cred); |
323 | static void __init lsm_early_task(struct task_struct *task); | |
324 | ||
e6b1db98 MG |
325 | static int lsm_append(const char *new, char **result); |
326 | ||
86ef3c73 KC |
327 | static void __init report_lsm_order(void) |
328 | { | |
329 | struct lsm_info **lsm, *early; | |
330 | int first = 0; | |
331 | ||
332 | pr_info("initializing lsm="); | |
333 | ||
334 | /* Report each enabled LSM name, comma separated. */ | |
335 | for (early = __start_early_lsm_info; early < __end_early_lsm_info; early++) | |
336 | if (is_enabled(early)) | |
337 | pr_cont("%s%s", first++ == 0 ? "" : ",", early->name); | |
338 | for (lsm = ordered_lsms; *lsm; lsm++) | |
339 | if (is_enabled(*lsm)) | |
340 | pr_cont("%s%s", first++ == 0 ? "" : ",", (*lsm)->name); | |
341 | ||
342 | pr_cont("\n"); | |
343 | } | |
344 | ||
2d4d5119 KC |
345 | static void __init ordered_lsm_init(void) |
346 | { | |
347 | struct lsm_info **lsm; | |
348 | ||
349 | ordered_lsms = kcalloc(LSM_COUNT + 1, sizeof(*ordered_lsms), | |
350 | GFP_KERNEL); | |
351 | ||
89a9684e KC |
352 | if (chosen_lsm_order) { |
353 | if (chosen_major_lsm) { | |
86ef3c73 KC |
354 | pr_warn("security=%s is ignored because it is superseded by lsm=%s\n", |
355 | chosen_major_lsm, chosen_lsm_order); | |
89a9684e KC |
356 | chosen_major_lsm = NULL; |
357 | } | |
79f7865d | 358 | ordered_lsm_parse(chosen_lsm_order, "cmdline"); |
89a9684e | 359 | } else |
79f7865d | 360 | ordered_lsm_parse(builtin_lsm_order, "builtin"); |
2d4d5119 KC |
361 | |
362 | for (lsm = ordered_lsms; *lsm; lsm++) | |
d8e9bbd4 KC |
363 | prepare_lsm(*lsm); |
364 | ||
86ef3c73 KC |
365 | report_lsm_order(); |
366 | ||
1aea7808 CS |
367 | init_debug("cred blob size = %d\n", blob_sizes.lbs_cred); |
368 | init_debug("file blob size = %d\n", blob_sizes.lbs_file); | |
369 | init_debug("inode blob size = %d\n", blob_sizes.lbs_inode); | |
370 | init_debug("ipc blob size = %d\n", blob_sizes.lbs_ipc); | |
371 | init_debug("msg_msg blob size = %d\n", blob_sizes.lbs_msg_msg); | |
372 | init_debug("superblock blob size = %d\n", blob_sizes.lbs_superblock); | |
373 | init_debug("task blob size = %d\n", blob_sizes.lbs_task); | |
33bf60ca CS |
374 | |
375 | /* | |
376 | * Create any kmem_caches needed for blobs | |
377 | */ | |
378 | if (blob_sizes.lbs_file) | |
379 | lsm_file_cache = kmem_cache_create("lsm_file_cache", | |
380 | blob_sizes.lbs_file, 0, | |
381 | SLAB_PANIC, NULL); | |
afb1cbe3 CS |
382 | if (blob_sizes.lbs_inode) |
383 | lsm_inode_cache = kmem_cache_create("lsm_inode_cache", | |
384 | blob_sizes.lbs_inode, 0, | |
385 | SLAB_PANIC, NULL); | |
bbd3662a | 386 | |
1cfb2a51 TH |
387 | lsm_early_cred((struct cred *) current->cred); |
388 | lsm_early_task(current); | |
d8e9bbd4 KC |
389 | for (lsm = ordered_lsms; *lsm; lsm++) |
390 | initialize_lsm(*lsm); | |
2d4d5119 KC |
391 | |
392 | kfree(ordered_lsms); | |
393 | } | |
394 | ||
e6b1db98 MG |
395 | int __init early_security_init(void) |
396 | { | |
e6b1db98 MG |
397 | struct lsm_info *lsm; |
398 | ||
75c1182e BW |
399 | #define LSM_HOOK(RET, DEFAULT, NAME, ...) \ |
400 | INIT_HLIST_HEAD(&security_hook_heads.NAME); | |
401 | #include "linux/lsm_hook_defs.h" | |
402 | #undef LSM_HOOK | |
e6b1db98 MG |
403 | |
404 | for (lsm = __start_early_lsm_info; lsm < __end_early_lsm_info; lsm++) { | |
405 | if (!lsm->enabled) | |
406 | lsm->enabled = &lsm_enabled_true; | |
407 | prepare_lsm(lsm); | |
408 | initialize_lsm(lsm); | |
409 | } | |
410 | ||
411 | return 0; | |
412 | } | |
413 | ||
1da177e4 LT |
414 | /** |
415 | * security_init - initializes the security framework | |
416 | * | |
417 | * This should be called early in the kernel initialization sequence. | |
418 | */ | |
419 | int __init security_init(void) | |
420 | { | |
e6b1db98 | 421 | struct lsm_info *lsm; |
3dfc9b02 | 422 | |
86ef3c73 KC |
423 | init_debug("legacy security=%s\n", chosen_major_lsm ?: " *unspecified*"); |
424 | init_debug(" CONFIG_LSM=%s\n", builtin_lsm_order); | |
425 | init_debug("boot arg lsm=%s\n", chosen_lsm_order ?: " *unspecified*"); | |
98d29170 | 426 | |
e6b1db98 MG |
427 | /* |
428 | * Append the names of the early LSM modules now that kmalloc() is | |
429 | * available | |
430 | */ | |
431 | for (lsm = __start_early_lsm_info; lsm < __end_early_lsm_info; lsm++) { | |
86ef3c73 KC |
432 | init_debug(" early started: %s (%s)\n", lsm->name, |
433 | is_enabled(lsm) ? "enabled" : "disabled"); | |
e6b1db98 MG |
434 | if (lsm->enabled) |
435 | lsm_append(lsm->name, &lsm_names); | |
436 | } | |
1da177e4 | 437 | |
657d910b KC |
438 | /* Load LSMs in specified order. */ |
439 | ordered_lsm_init(); | |
440 | ||
1da177e4 LT |
441 | return 0; |
442 | } | |
443 | ||
076c54c5 | 444 | /* Save user chosen LSM */ |
5ef4e419 | 445 | static int __init choose_major_lsm(char *str) |
076c54c5 | 446 | { |
5ef4e419 | 447 | chosen_major_lsm = str; |
076c54c5 AD |
448 | return 1; |
449 | } | |
5ef4e419 | 450 | __setup("security=", choose_major_lsm); |
076c54c5 | 451 | |
79f7865d KC |
452 | /* Explicitly choose LSM initialization order. */ |
453 | static int __init choose_lsm_order(char *str) | |
454 | { | |
455 | chosen_lsm_order = str; | |
456 | return 1; | |
457 | } | |
458 | __setup("lsm=", choose_lsm_order); | |
459 | ||
9b8c7c14 KC |
460 | /* Enable LSM order debugging. */ |
461 | static int __init enable_debug(char *str) | |
462 | { | |
463 | debug = true; | |
464 | return 1; | |
465 | } | |
466 | __setup("lsm.debug", enable_debug); | |
467 | ||
3bb857e4 MS |
468 | static bool match_last_lsm(const char *list, const char *lsm) |
469 | { | |
470 | const char *last; | |
471 | ||
472 | if (WARN_ON(!list || !lsm)) | |
473 | return false; | |
474 | last = strrchr(list, ','); | |
475 | if (last) | |
476 | /* Pass the comma, strcmp() will check for '\0' */ | |
477 | last++; | |
478 | else | |
479 | last = list; | |
480 | return !strcmp(last, lsm); | |
481 | } | |
482 | ||
e6b1db98 | 483 | static int lsm_append(const char *new, char **result) |
d69dece5 CS |
484 | { |
485 | char *cp; | |
486 | ||
487 | if (*result == NULL) { | |
488 | *result = kstrdup(new, GFP_KERNEL); | |
87ea5843 EB |
489 | if (*result == NULL) |
490 | return -ENOMEM; | |
d69dece5 | 491 | } else { |
3bb857e4 MS |
492 | /* Check if it is the last registered name */ |
493 | if (match_last_lsm(*result, new)) | |
494 | return 0; | |
d69dece5 CS |
495 | cp = kasprintf(GFP_KERNEL, "%s,%s", *result, new); |
496 | if (cp == NULL) | |
497 | return -ENOMEM; | |
498 | kfree(*result); | |
499 | *result = cp; | |
500 | } | |
501 | return 0; | |
502 | } | |
503 | ||
d69dece5 CS |
504 | /** |
505 | * security_add_hooks - Add a modules hooks to the hook lists. | |
506 | * @hooks: the hooks to add | |
507 | * @count: the number of hooks to add | |
508 | * @lsm: the name of the security module | |
509 | * | |
510 | * Each LSM has to register its hooks with the infrastructure. | |
511 | */ | |
512 | void __init security_add_hooks(struct security_hook_list *hooks, int count, | |
1af0e4a0 | 513 | const char *lsm) |
d69dece5 CS |
514 | { |
515 | int i; | |
516 | ||
517 | for (i = 0; i < count; i++) { | |
518 | hooks[i].lsm = lsm; | |
df0ce173 | 519 | hlist_add_tail_rcu(&hooks[i].list, hooks[i].head); |
d69dece5 | 520 | } |
e6b1db98 MG |
521 | |
522 | /* | |
523 | * Don't try to append during early_security_init(), we'll come back | |
524 | * and fix this up afterwards. | |
525 | */ | |
526 | if (slab_is_available()) { | |
527 | if (lsm_append(lsm, &lsm_names) < 0) | |
528 | panic("%s - Cannot get early memory.\n", __func__); | |
529 | } | |
d69dece5 CS |
530 | } |
531 | ||
42df744c | 532 | int call_blocking_lsm_notifier(enum lsm_event event, void *data) |
8f408ab6 | 533 | { |
42df744c JK |
534 | return blocking_notifier_call_chain(&blocking_lsm_notifier_chain, |
535 | event, data); | |
8f408ab6 | 536 | } |
42df744c | 537 | EXPORT_SYMBOL(call_blocking_lsm_notifier); |
8f408ab6 | 538 | |
42df744c | 539 | int register_blocking_lsm_notifier(struct notifier_block *nb) |
8f408ab6 | 540 | { |
42df744c JK |
541 | return blocking_notifier_chain_register(&blocking_lsm_notifier_chain, |
542 | nb); | |
8f408ab6 | 543 | } |
42df744c | 544 | EXPORT_SYMBOL(register_blocking_lsm_notifier); |
8f408ab6 | 545 | |
42df744c | 546 | int unregister_blocking_lsm_notifier(struct notifier_block *nb) |
8f408ab6 | 547 | { |
42df744c JK |
548 | return blocking_notifier_chain_unregister(&blocking_lsm_notifier_chain, |
549 | nb); | |
8f408ab6 | 550 | } |
42df744c | 551 | EXPORT_SYMBOL(unregister_blocking_lsm_notifier); |
8f408ab6 | 552 | |
bbd3662a CS |
553 | /** |
554 | * lsm_cred_alloc - allocate a composite cred blob | |
555 | * @cred: the cred that needs a blob | |
556 | * @gfp: allocation type | |
557 | * | |
558 | * Allocate the cred blob for all the modules | |
559 | * | |
560 | * Returns 0, or -ENOMEM if memory can't be allocated. | |
561 | */ | |
562 | static int lsm_cred_alloc(struct cred *cred, gfp_t gfp) | |
563 | { | |
564 | if (blob_sizes.lbs_cred == 0) { | |
565 | cred->security = NULL; | |
566 | return 0; | |
567 | } | |
568 | ||
569 | cred->security = kzalloc(blob_sizes.lbs_cred, gfp); | |
570 | if (cred->security == NULL) | |
571 | return -ENOMEM; | |
572 | return 0; | |
573 | } | |
574 | ||
575 | /** | |
576 | * lsm_early_cred - during initialization allocate a composite cred blob | |
577 | * @cred: the cred that needs a blob | |
578 | * | |
1cfb2a51 | 579 | * Allocate the cred blob for all the modules |
bbd3662a | 580 | */ |
1cfb2a51 | 581 | static void __init lsm_early_cred(struct cred *cred) |
bbd3662a | 582 | { |
1cfb2a51 | 583 | int rc = lsm_cred_alloc(cred, GFP_KERNEL); |
bbd3662a | 584 | |
bbd3662a CS |
585 | if (rc) |
586 | panic("%s: Early cred alloc failed.\n", __func__); | |
587 | } | |
588 | ||
33bf60ca CS |
589 | /** |
590 | * lsm_file_alloc - allocate a composite file blob | |
591 | * @file: the file that needs a blob | |
592 | * | |
593 | * Allocate the file blob for all the modules | |
594 | * | |
595 | * Returns 0, or -ENOMEM if memory can't be allocated. | |
596 | */ | |
597 | static int lsm_file_alloc(struct file *file) | |
598 | { | |
599 | if (!lsm_file_cache) { | |
600 | file->f_security = NULL; | |
601 | return 0; | |
602 | } | |
603 | ||
604 | file->f_security = kmem_cache_zalloc(lsm_file_cache, GFP_KERNEL); | |
605 | if (file->f_security == NULL) | |
606 | return -ENOMEM; | |
607 | return 0; | |
608 | } | |
609 | ||
afb1cbe3 CS |
610 | /** |
611 | * lsm_inode_alloc - allocate a composite inode blob | |
612 | * @inode: the inode that needs a blob | |
613 | * | |
614 | * Allocate the inode blob for all the modules | |
615 | * | |
616 | * Returns 0, or -ENOMEM if memory can't be allocated. | |
617 | */ | |
618 | int lsm_inode_alloc(struct inode *inode) | |
619 | { | |
620 | if (!lsm_inode_cache) { | |
621 | inode->i_security = NULL; | |
622 | return 0; | |
623 | } | |
624 | ||
625 | inode->i_security = kmem_cache_zalloc(lsm_inode_cache, GFP_NOFS); | |
626 | if (inode->i_security == NULL) | |
627 | return -ENOMEM; | |
628 | return 0; | |
629 | } | |
630 | ||
f4ad8f2c CS |
631 | /** |
632 | * lsm_task_alloc - allocate a composite task blob | |
633 | * @task: the task that needs a blob | |
634 | * | |
635 | * Allocate the task blob for all the modules | |
636 | * | |
637 | * Returns 0, or -ENOMEM if memory can't be allocated. | |
638 | */ | |
3e8c7367 | 639 | static int lsm_task_alloc(struct task_struct *task) |
f4ad8f2c CS |
640 | { |
641 | if (blob_sizes.lbs_task == 0) { | |
642 | task->security = NULL; | |
643 | return 0; | |
644 | } | |
645 | ||
646 | task->security = kzalloc(blob_sizes.lbs_task, GFP_KERNEL); | |
647 | if (task->security == NULL) | |
648 | return -ENOMEM; | |
649 | return 0; | |
650 | } | |
651 | ||
ecd5f82e CS |
652 | /** |
653 | * lsm_ipc_alloc - allocate a composite ipc blob | |
654 | * @kip: the ipc that needs a blob | |
655 | * | |
656 | * Allocate the ipc blob for all the modules | |
657 | * | |
658 | * Returns 0, or -ENOMEM if memory can't be allocated. | |
659 | */ | |
3e8c7367 | 660 | static int lsm_ipc_alloc(struct kern_ipc_perm *kip) |
ecd5f82e CS |
661 | { |
662 | if (blob_sizes.lbs_ipc == 0) { | |
663 | kip->security = NULL; | |
664 | return 0; | |
665 | } | |
666 | ||
667 | kip->security = kzalloc(blob_sizes.lbs_ipc, GFP_KERNEL); | |
668 | if (kip->security == NULL) | |
669 | return -ENOMEM; | |
670 | return 0; | |
671 | } | |
672 | ||
673 | /** | |
674 | * lsm_msg_msg_alloc - allocate a composite msg_msg blob | |
675 | * @mp: the msg_msg that needs a blob | |
676 | * | |
677 | * Allocate the ipc blob for all the modules | |
678 | * | |
679 | * Returns 0, or -ENOMEM if memory can't be allocated. | |
680 | */ | |
3e8c7367 | 681 | static int lsm_msg_msg_alloc(struct msg_msg *mp) |
ecd5f82e CS |
682 | { |
683 | if (blob_sizes.lbs_msg_msg == 0) { | |
684 | mp->security = NULL; | |
685 | return 0; | |
686 | } | |
687 | ||
688 | mp->security = kzalloc(blob_sizes.lbs_msg_msg, GFP_KERNEL); | |
689 | if (mp->security == NULL) | |
690 | return -ENOMEM; | |
691 | return 0; | |
692 | } | |
693 | ||
f4ad8f2c CS |
694 | /** |
695 | * lsm_early_task - during initialization allocate a composite task blob | |
696 | * @task: the task that needs a blob | |
697 | * | |
1cfb2a51 | 698 | * Allocate the task blob for all the modules |
f4ad8f2c | 699 | */ |
1cfb2a51 | 700 | static void __init lsm_early_task(struct task_struct *task) |
f4ad8f2c | 701 | { |
1cfb2a51 | 702 | int rc = lsm_task_alloc(task); |
f4ad8f2c | 703 | |
f4ad8f2c CS |
704 | if (rc) |
705 | panic("%s: Early task alloc failed.\n", __func__); | |
706 | } | |
707 | ||
1aea7808 CS |
708 | /** |
709 | * lsm_superblock_alloc - allocate a composite superblock blob | |
710 | * @sb: the superblock that needs a blob | |
711 | * | |
712 | * Allocate the superblock blob for all the modules | |
713 | * | |
714 | * Returns 0, or -ENOMEM if memory can't be allocated. | |
715 | */ | |
716 | static int lsm_superblock_alloc(struct super_block *sb) | |
717 | { | |
718 | if (blob_sizes.lbs_superblock == 0) { | |
719 | sb->s_security = NULL; | |
720 | return 0; | |
721 | } | |
722 | ||
723 | sb->s_security = kzalloc(blob_sizes.lbs_superblock, GFP_KERNEL); | |
724 | if (sb->s_security == NULL) | |
725 | return -ENOMEM; | |
726 | return 0; | |
727 | } | |
728 | ||
98e828a0 KS |
729 | /* |
730 | * The default value of the LSM hook is defined in linux/lsm_hook_defs.h and | |
731 | * can be accessed with: | |
732 | * | |
733 | * LSM_RET_DEFAULT(<hook_name>) | |
734 | * | |
735 | * The macros below define static constants for the default value of each | |
736 | * LSM hook. | |
737 | */ | |
738 | #define LSM_RET_DEFAULT(NAME) (NAME##_default) | |
739 | #define DECLARE_LSM_RET_DEFAULT_void(DEFAULT, NAME) | |
740 | #define DECLARE_LSM_RET_DEFAULT_int(DEFAULT, NAME) \ | |
86dd9fd5 | 741 | static const int __maybe_unused LSM_RET_DEFAULT(NAME) = (DEFAULT); |
98e828a0 KS |
742 | #define LSM_HOOK(RET, DEFAULT, NAME, ...) \ |
743 | DECLARE_LSM_RET_DEFAULT_##RET(DEFAULT, NAME) | |
744 | ||
745 | #include <linux/lsm_hook_defs.h> | |
746 | #undef LSM_HOOK | |
747 | ||
f25fce3e | 748 | /* |
b1d9e6b0 | 749 | * Hook list operation macros. |
1da177e4 | 750 | * |
f25fce3e CS |
751 | * call_void_hook: |
752 | * This is a hook that does not return a value. | |
1da177e4 | 753 | * |
f25fce3e CS |
754 | * call_int_hook: |
755 | * This is a hook that returns a value. | |
1da177e4 | 756 | */ |
1da177e4 | 757 | |
b1d9e6b0 CS |
758 | #define call_void_hook(FUNC, ...) \ |
759 | do { \ | |
760 | struct security_hook_list *P; \ | |
761 | \ | |
df0ce173 | 762 | hlist_for_each_entry(P, &security_hook_heads.FUNC, list) \ |
b1d9e6b0 CS |
763 | P->hook.FUNC(__VA_ARGS__); \ |
764 | } while (0) | |
765 | ||
766 | #define call_int_hook(FUNC, IRC, ...) ({ \ | |
767 | int RC = IRC; \ | |
768 | do { \ | |
769 | struct security_hook_list *P; \ | |
770 | \ | |
df0ce173 | 771 | hlist_for_each_entry(P, &security_hook_heads.FUNC, list) { \ |
b1d9e6b0 CS |
772 | RC = P->hook.FUNC(__VA_ARGS__); \ |
773 | if (RC != 0) \ | |
774 | break; \ | |
775 | } \ | |
776 | } while (0); \ | |
777 | RC; \ | |
778 | }) | |
1da177e4 | 779 | |
20510f2f JM |
780 | /* Security operations */ |
781 | ||
52f88693 | 782 | int security_binder_set_context_mgr(const struct cred *mgr) |
79af7307 | 783 | { |
f25fce3e | 784 | return call_int_hook(binder_set_context_mgr, 0, mgr); |
79af7307 SS |
785 | } |
786 | ||
52f88693 TK |
787 | int security_binder_transaction(const struct cred *from, |
788 | const struct cred *to) | |
79af7307 | 789 | { |
f25fce3e | 790 | return call_int_hook(binder_transaction, 0, from, to); |
79af7307 SS |
791 | } |
792 | ||
52f88693 TK |
793 | int security_binder_transfer_binder(const struct cred *from, |
794 | const struct cred *to) | |
79af7307 | 795 | { |
f25fce3e | 796 | return call_int_hook(binder_transfer_binder, 0, from, to); |
79af7307 SS |
797 | } |
798 | ||
52f88693 TK |
799 | int security_binder_transfer_file(const struct cred *from, |
800 | const struct cred *to, struct file *file) | |
79af7307 | 801 | { |
f25fce3e | 802 | return call_int_hook(binder_transfer_file, 0, from, to, file); |
79af7307 SS |
803 | } |
804 | ||
9e48858f | 805 | int security_ptrace_access_check(struct task_struct *child, unsigned int mode) |
20510f2f | 806 | { |
f25fce3e | 807 | return call_int_hook(ptrace_access_check, 0, child, mode); |
5cd9c58f DH |
808 | } |
809 | ||
810 | int security_ptrace_traceme(struct task_struct *parent) | |
811 | { | |
f25fce3e | 812 | return call_int_hook(ptrace_traceme, 0, parent); |
20510f2f JM |
813 | } |
814 | ||
815 | int security_capget(struct task_struct *target, | |
816 | kernel_cap_t *effective, | |
817 | kernel_cap_t *inheritable, | |
818 | kernel_cap_t *permitted) | |
819 | { | |
f25fce3e CS |
820 | return call_int_hook(capget, 0, target, |
821 | effective, inheritable, permitted); | |
20510f2f JM |
822 | } |
823 | ||
d84f4f99 DH |
824 | int security_capset(struct cred *new, const struct cred *old, |
825 | const kernel_cap_t *effective, | |
826 | const kernel_cap_t *inheritable, | |
827 | const kernel_cap_t *permitted) | |
20510f2f | 828 | { |
f25fce3e CS |
829 | return call_int_hook(capset, 0, new, old, |
830 | effective, inheritable, permitted); | |
20510f2f JM |
831 | } |
832 | ||
c1a85a00 MM |
833 | int security_capable(const struct cred *cred, |
834 | struct user_namespace *ns, | |
835 | int cap, | |
836 | unsigned int opts) | |
20510f2f | 837 | { |
c1a85a00 | 838 | return call_int_hook(capable, 0, cred, ns, cap, opts); |
20510f2f JM |
839 | } |
840 | ||
20510f2f JM |
841 | int security_quotactl(int cmds, int type, int id, struct super_block *sb) |
842 | { | |
f25fce3e | 843 | return call_int_hook(quotactl, 0, cmds, type, id, sb); |
20510f2f JM |
844 | } |
845 | ||
846 | int security_quota_on(struct dentry *dentry) | |
847 | { | |
f25fce3e | 848 | return call_int_hook(quota_on, 0, dentry); |
20510f2f JM |
849 | } |
850 | ||
12b3052c | 851 | int security_syslog(int type) |
20510f2f | 852 | { |
f25fce3e | 853 | return call_int_hook(syslog, 0, type); |
20510f2f JM |
854 | } |
855 | ||
457db29b | 856 | int security_settime64(const struct timespec64 *ts, const struct timezone *tz) |
20510f2f | 857 | { |
f25fce3e | 858 | return call_int_hook(settime, 0, ts, tz); |
20510f2f JM |
859 | } |
860 | ||
20510f2f JM |
861 | int security_vm_enough_memory_mm(struct mm_struct *mm, long pages) |
862 | { | |
b1d9e6b0 CS |
863 | struct security_hook_list *hp; |
864 | int cap_sys_admin = 1; | |
865 | int rc; | |
866 | ||
867 | /* | |
868 | * The module will respond with a positive value if | |
869 | * it thinks the __vm_enough_memory() call should be | |
870 | * made with the cap_sys_admin set. If all of the modules | |
871 | * agree that it should be set it will. If any module | |
872 | * thinks it should not be set it won't. | |
873 | */ | |
df0ce173 | 874 | hlist_for_each_entry(hp, &security_hook_heads.vm_enough_memory, list) { |
b1d9e6b0 CS |
875 | rc = hp->hook.vm_enough_memory(mm, pages); |
876 | if (rc <= 0) { | |
877 | cap_sys_admin = 0; | |
878 | break; | |
879 | } | |
880 | } | |
881 | return __vm_enough_memory(mm, pages, cap_sys_admin); | |
20510f2f JM |
882 | } |
883 | ||
1661372c PM |
884 | /** |
885 | * security_bprm_creds_for_exec() - Prepare the credentials for exec() | |
886 | * @bprm: binary program information | |
887 | * | |
888 | * If the setup in prepare_exec_creds did not setup @bprm->cred->security | |
889 | * properly for executing @bprm->file, update the LSM's portion of | |
890 | * @bprm->cred->security to be what commit_creds needs to install for the new | |
891 | * program. This hook may also optionally check permissions (e.g. for | |
892 | * transitions between security domains). The hook must set @bprm->secureexec | |
893 | * to 1 if AT_SECURE should be set to request libc enable secure mode. @bprm | |
894 | * contains the linux_binprm structure. | |
895 | * | |
896 | * Return: Returns 0 if the hook is successful and permission is granted. | |
897 | */ | |
b8bff599 | 898 | int security_bprm_creds_for_exec(struct linux_binprm *bprm) |
20510f2f | 899 | { |
b8bff599 EB |
900 | return call_int_hook(bprm_creds_for_exec, 0, bprm); |
901 | } | |
902 | ||
1661372c PM |
903 | /** |
904 | * security_bprm_creds_from_file() - Update linux_binprm creds based on file | |
905 | * @bprm: binary program information | |
906 | * @file: associated file | |
907 | * | |
908 | * If @file is setpcap, suid, sgid or otherwise marked to change privilege upon | |
909 | * exec, update @bprm->cred to reflect that change. This is called after | |
910 | * finding the binary that will be executed without an interpreter. This | |
911 | * ensures that the credentials will not be derived from a script that the | |
912 | * binary will need to reopen, which when reopend may end up being a completely | |
913 | * different file. This hook may also optionally check permissions (e.g. for | |
914 | * transitions between security domains). The hook must set @bprm->secureexec | |
915 | * to 1 if AT_SECURE should be set to request libc enable secure mode. The | |
916 | * hook must add to @bprm->per_clear any personality flags that should be | |
917 | * cleared from current->personality. @bprm contains the linux_binprm | |
918 | * structure. | |
919 | * | |
920 | * Return: Returns 0 if the hook is successful and permission is granted. | |
921 | */ | |
56305aa9 | 922 | int security_bprm_creds_from_file(struct linux_binprm *bprm, struct file *file) |
20510f2f | 923 | { |
56305aa9 | 924 | return call_int_hook(bprm_creds_from_file, 0, bprm, file); |
20510f2f JM |
925 | } |
926 | ||
1661372c PM |
927 | /** |
928 | * security_bprm_check() - Mediate binary handler search | |
929 | * @bprm: binary program information | |
930 | * | |
931 | * This hook mediates the point when a search for a binary handler will begin. | |
932 | * It allows a check against the @bprm->cred->security value which was set in | |
933 | * the preceding creds_for_exec call. The argv list and envp list are reliably | |
934 | * available in @bprm. This hook may be called multiple times during a single | |
935 | * execve. @bprm contains the linux_binprm structure. | |
936 | * | |
937 | * Return: Returns 0 if the hook is successful and permission is granted. | |
938 | */ | |
a6f76f23 | 939 | int security_bprm_check(struct linux_binprm *bprm) |
20510f2f | 940 | { |
6c21a7fb MZ |
941 | int ret; |
942 | ||
f25fce3e | 943 | ret = call_int_hook(bprm_check_security, 0, bprm); |
6c21a7fb MZ |
944 | if (ret) |
945 | return ret; | |
946 | return ima_bprm_check(bprm); | |
20510f2f JM |
947 | } |
948 | ||
1661372c PM |
949 | /** |
950 | * security_bprm_committing_creds() - Install creds for a process during exec() | |
951 | * @bprm: binary program information | |
952 | * | |
953 | * Prepare to install the new security attributes of a process being | |
954 | * transformed by an execve operation, based on the old credentials pointed to | |
955 | * by @current->cred and the information set in @bprm->cred by the | |
956 | * bprm_creds_for_exec hook. @bprm points to the linux_binprm structure. This | |
957 | * hook is a good place to perform state changes on the process such as closing | |
958 | * open file descriptors to which access will no longer be granted when the | |
959 | * attributes are changed. This is called immediately before commit_creds(). | |
960 | */ | |
a6f76f23 | 961 | void security_bprm_committing_creds(struct linux_binprm *bprm) |
20510f2f | 962 | { |
f25fce3e | 963 | call_void_hook(bprm_committing_creds, bprm); |
20510f2f JM |
964 | } |
965 | ||
1661372c PM |
966 | /** |
967 | * security_bprm_committed_creds() - Tidy up after cred install during exec() | |
968 | * @bprm: binary program information | |
969 | * | |
970 | * Tidy up after the installation of the new security attributes of a process | |
971 | * being transformed by an execve operation. The new credentials have, by this | |
972 | * point, been set to @current->cred. @bprm points to the linux_binprm | |
973 | * structure. This hook is a good place to perform state changes on the | |
974 | * process such as clearing out non-inheritable signal state. This is called | |
975 | * immediately after commit_creds(). | |
976 | */ | |
a6f76f23 | 977 | void security_bprm_committed_creds(struct linux_binprm *bprm) |
20510f2f | 978 | { |
f25fce3e | 979 | call_void_hook(bprm_committed_creds, bprm); |
20510f2f JM |
980 | } |
981 | ||
36819f18 PM |
982 | /** |
983 | * security_fs_context_dup() - Duplicate a fs_context LSM blob | |
984 | * @fc: destination filesystem context | |
985 | * @src_fc: source filesystem context | |
986 | * | |
987 | * Allocate and attach a security structure to sc->security. This pointer is | |
988 | * initialised to NULL by the caller. @fc indicates the new filesystem context. | |
989 | * @src_fc indicates the original filesystem context. | |
990 | * | |
991 | * Return: Returns 0 on success or a negative error code on failure. | |
992 | */ | |
0b52075e AV |
993 | int security_fs_context_dup(struct fs_context *fc, struct fs_context *src_fc) |
994 | { | |
995 | return call_int_hook(fs_context_dup, 0, fc, src_fc); | |
996 | } | |
997 | ||
36819f18 PM |
998 | /** |
999 | * security_fs_context_parse_param() - Configure a filesystem context | |
1000 | * @fc: filesystem context | |
1001 | * @param: filesystem parameter | |
1002 | * | |
1003 | * Userspace provided a parameter to configure a superblock. The LSM can | |
1004 | * consume the parameter or return it to the caller for use elsewhere. | |
1005 | * | |
1006 | * Return: If the parameter is used by the LSM it should return 0, if it is | |
1007 | * returned to the caller -ENOPARAM is returned, otherwise a negative | |
1008 | * error code is returned. | |
1009 | */ | |
ecff3057 CS |
1010 | int security_fs_context_parse_param(struct fs_context *fc, |
1011 | struct fs_parameter *param) | |
da2441fd | 1012 | { |
ecff3057 CS |
1013 | struct security_hook_list *hp; |
1014 | int trc; | |
1015 | int rc = -ENOPARAM; | |
1016 | ||
1017 | hlist_for_each_entry(hp, &security_hook_heads.fs_context_parse_param, | |
1018 | list) { | |
1019 | trc = hp->hook.fs_context_parse_param(fc, param); | |
1020 | if (trc == 0) | |
1021 | rc = 0; | |
1022 | else if (trc != -ENOPARAM) | |
1023 | return trc; | |
1024 | } | |
1025 | return rc; | |
da2441fd DH |
1026 | } |
1027 | ||
08526a90 PM |
1028 | /** |
1029 | * security_sb_alloc() - Allocate a super_block LSM blob | |
1030 | * @sb: filesystem superblock | |
1031 | * | |
1032 | * Allocate and attach a security structure to the sb->s_security field. The | |
1033 | * s_security field is initialized to NULL when the structure is allocated. | |
1034 | * @sb contains the super_block structure to be modified. | |
1035 | * | |
1036 | * Return: Returns 0 if operation was successful. | |
1037 | */ | |
20510f2f JM |
1038 | int security_sb_alloc(struct super_block *sb) |
1039 | { | |
1aea7808 CS |
1040 | int rc = lsm_superblock_alloc(sb); |
1041 | ||
1042 | if (unlikely(rc)) | |
1043 | return rc; | |
1044 | rc = call_int_hook(sb_alloc_security, 0, sb); | |
1045 | if (unlikely(rc)) | |
1046 | security_sb_free(sb); | |
1047 | return rc; | |
20510f2f JM |
1048 | } |
1049 | ||
08526a90 PM |
1050 | /** |
1051 | * security_sb_delete() - Release super_block LSM associated objects | |
1052 | * @sb: filesystem superblock | |
1053 | * | |
1054 | * Release objects tied to a superblock (e.g. inodes). @sb contains the | |
1055 | * super_block structure being released. | |
1056 | */ | |
83e804f0 MS |
1057 | void security_sb_delete(struct super_block *sb) |
1058 | { | |
1059 | call_void_hook(sb_delete, sb); | |
20510f2f JM |
1060 | } |
1061 | ||
08526a90 PM |
1062 | /** |
1063 | * security_sb_free() - Free a super_block LSM blob | |
1064 | * @sb: filesystem superblock | |
1065 | * | |
1066 | * Deallocate and clear the sb->s_security field. @sb contains the super_block | |
1067 | * structure to be modified. | |
1068 | */ | |
20510f2f JM |
1069 | void security_sb_free(struct super_block *sb) |
1070 | { | |
f25fce3e | 1071 | call_void_hook(sb_free_security, sb); |
1aea7808 CS |
1072 | kfree(sb->s_security); |
1073 | sb->s_security = NULL; | |
20510f2f JM |
1074 | } |
1075 | ||
08526a90 PM |
1076 | /** |
1077 | * security_free_mnt_opts() - Free memory associated with mount options | |
1078 | * @mnt_ops: LSM processed mount options | |
1079 | * | |
1080 | * Free memory associated with @mnt_ops. | |
1081 | */ | |
204cc0cc | 1082 | void security_free_mnt_opts(void **mnt_opts) |
20510f2f | 1083 | { |
204cc0cc AV |
1084 | if (!*mnt_opts) |
1085 | return; | |
1086 | call_void_hook(sb_free_mnt_opts, *mnt_opts); | |
1087 | *mnt_opts = NULL; | |
20510f2f | 1088 | } |
204cc0cc | 1089 | EXPORT_SYMBOL(security_free_mnt_opts); |
20510f2f | 1090 | |
08526a90 PM |
1091 | /** |
1092 | * security_sb_eat_lsm_opts() - Consume LSM mount options | |
1093 | * @options: mount options | |
1094 | * @mnt_ops: LSM processed mount options | |
1095 | * | |
1096 | * Eat (scan @options) and save them in @mnt_opts. | |
1097 | * | |
1098 | * Return: Returns 0 on success, negative values on failure. | |
1099 | */ | |
204cc0cc | 1100 | int security_sb_eat_lsm_opts(char *options, void **mnt_opts) |
ff36fe2c | 1101 | { |
204cc0cc | 1102 | return call_int_hook(sb_eat_lsm_opts, 0, options, mnt_opts); |
ff36fe2c | 1103 | } |
f5c0c26d | 1104 | EXPORT_SYMBOL(security_sb_eat_lsm_opts); |
ff36fe2c | 1105 | |
08526a90 PM |
1106 | /** |
1107 | * security_sb_mnt_opts_compat() - Check if new mount options are allowed | |
1108 | * @sb: filesystem superblock | |
1109 | * @mnt_opts: new mount options | |
1110 | * | |
1111 | * Determine if the new mount options in @mnt_opts are allowed given the | |
1112 | * existing mounted filesystem at @sb. @sb superblock being compared. | |
1113 | * | |
1114 | * Return: Returns 0 if options are compatible. | |
1115 | */ | |
69c4a42d OK |
1116 | int security_sb_mnt_opts_compat(struct super_block *sb, |
1117 | void *mnt_opts) | |
1118 | { | |
1119 | return call_int_hook(sb_mnt_opts_compat, 0, sb, mnt_opts); | |
1120 | } | |
1121 | EXPORT_SYMBOL(security_sb_mnt_opts_compat); | |
1122 | ||
08526a90 PM |
1123 | /** |
1124 | * security_sb_remount() - Verify no incompatible mount changes during remount | |
1125 | * @sb: filesystem superblock | |
1126 | * @mnt_opts: (re)mount options | |
1127 | * | |
1128 | * Extracts security system specific mount options and verifies no changes are | |
1129 | * being made to those options. | |
1130 | * | |
1131 | * Return: Returns 0 if permission is granted. | |
1132 | */ | |
c039bc3c | 1133 | int security_sb_remount(struct super_block *sb, |
204cc0cc | 1134 | void *mnt_opts) |
20510f2f | 1135 | { |
204cc0cc | 1136 | return call_int_hook(sb_remount, 0, sb, mnt_opts); |
ff36fe2c | 1137 | } |
a65001e8 | 1138 | EXPORT_SYMBOL(security_sb_remount); |
ff36fe2c | 1139 | |
08526a90 PM |
1140 | /** |
1141 | * security_sb_kern_mount() - Check if a kernel mount is allowed | |
1142 | * @sb: filesystem superblock | |
1143 | * | |
1144 | * Mount this @sb if allowed by permissions. | |
1145 | * | |
1146 | * Return: Returns 0 if permission is granted. | |
1147 | */ | |
a10d7c22 | 1148 | int security_sb_kern_mount(struct super_block *sb) |
20510f2f | 1149 | { |
a10d7c22 | 1150 | return call_int_hook(sb_kern_mount, 0, sb); |
20510f2f JM |
1151 | } |
1152 | ||
08526a90 PM |
1153 | /** |
1154 | * security_sb_show_options() - Output the mount options for a superblock | |
1155 | * @m: output file | |
1156 | * @sb: filesystem superblock | |
1157 | * | |
1158 | * Show (print on @m) mount options for this @sb. | |
1159 | * | |
1160 | * Return: Returns 0 on success, negative values on failure. | |
1161 | */ | |
2069f457 EP |
1162 | int security_sb_show_options(struct seq_file *m, struct super_block *sb) |
1163 | { | |
f25fce3e | 1164 | return call_int_hook(sb_show_options, 0, m, sb); |
2069f457 EP |
1165 | } |
1166 | ||
08526a90 PM |
1167 | /** |
1168 | * security_sb_statfs() - Check if accessing fs stats is allowed | |
1169 | * @dentry: superblock handle | |
1170 | * | |
1171 | * Check permission before obtaining filesystem statistics for the @mnt | |
1172 | * mountpoint. @dentry is a handle on the superblock for the filesystem. | |
1173 | * | |
1174 | * Return: Returns 0 if permission is granted. | |
1175 | */ | |
20510f2f JM |
1176 | int security_sb_statfs(struct dentry *dentry) |
1177 | { | |
f25fce3e | 1178 | return call_int_hook(sb_statfs, 0, dentry); |
20510f2f JM |
1179 | } |
1180 | ||
08526a90 PM |
1181 | /** |
1182 | * security_sb_mount() - Check permission for mounting a filesystem | |
1183 | * @dev_name: filesystem backing device | |
1184 | * @path: mount point | |
1185 | * @type: filesystem type | |
1186 | * @flags: mount flags | |
1187 | * @data: filesystem specific data | |
1188 | * | |
1189 | * Check permission before an object specified by @dev_name is mounted on the | |
1190 | * mount point named by @nd. For an ordinary mount, @dev_name identifies a | |
1191 | * device if the file system type requires a device. For a remount | |
1192 | * (@flags & MS_REMOUNT), @dev_name is irrelevant. For a loopback/bind mount | |
1193 | * (@flags & MS_BIND), @dev_name identifies the pathname of the object being | |
1194 | * mounted. | |
1195 | * | |
1196 | * Return: Returns 0 if permission is granted. | |
1197 | */ | |
8a04c43b | 1198 | int security_sb_mount(const char *dev_name, const struct path *path, |
808d4e3c | 1199 | const char *type, unsigned long flags, void *data) |
20510f2f | 1200 | { |
f25fce3e | 1201 | return call_int_hook(sb_mount, 0, dev_name, path, type, flags, data); |
20510f2f JM |
1202 | } |
1203 | ||
08526a90 PM |
1204 | /** |
1205 | * security_sb_umount() - Check permission for unmounting a filesystem | |
1206 | * @mnt: mounted filesystem | |
1207 | * @flags: unmount flags | |
1208 | * | |
1209 | * Check permission before the @mnt file system is unmounted. | |
1210 | * | |
1211 | * Return: Returns 0 if permission is granted. | |
1212 | */ | |
20510f2f JM |
1213 | int security_sb_umount(struct vfsmount *mnt, int flags) |
1214 | { | |
f25fce3e | 1215 | return call_int_hook(sb_umount, 0, mnt, flags); |
20510f2f JM |
1216 | } |
1217 | ||
08526a90 PM |
1218 | /** |
1219 | * security_sb_pivotroot() - Check permissions for pivoting the rootfs | |
1220 | * @old_path: new location for current rootfs | |
1221 | * @new_path: location of the new rootfs | |
1222 | * | |
1223 | * Check permission before pivoting the root filesystem. | |
1224 | * | |
1225 | * Return: Returns 0 if permission is granted. | |
1226 | */ | |
3b73b68c | 1227 | int security_sb_pivotroot(const struct path *old_path, const struct path *new_path) |
20510f2f | 1228 | { |
f25fce3e | 1229 | return call_int_hook(sb_pivotroot, 0, old_path, new_path); |
20510f2f JM |
1230 | } |
1231 | ||
08526a90 PM |
1232 | /** |
1233 | * security_sb_set_mnt_opts() - Set the mount options for a filesystem | |
1234 | * @sb: filesystem superblock | |
1235 | * @mnt_opts: binary mount options | |
1236 | * @kern_flags: kernel flags (in) | |
1237 | * @set_kern_flags: kernel flags (out) | |
1238 | * | |
1239 | * Set the security relevant mount options used for a superblock. | |
1240 | * | |
1241 | * Return: Returns 0 on success, error on failure. | |
1242 | */ | |
c9180a57 | 1243 | int security_sb_set_mnt_opts(struct super_block *sb, |
204cc0cc | 1244 | void *mnt_opts, |
649f6e77 DQ |
1245 | unsigned long kern_flags, |
1246 | unsigned long *set_kern_flags) | |
c9180a57 | 1247 | { |
b1d9e6b0 | 1248 | return call_int_hook(sb_set_mnt_opts, |
204cc0cc AV |
1249 | mnt_opts ? -EOPNOTSUPP : 0, sb, |
1250 | mnt_opts, kern_flags, set_kern_flags); | |
c9180a57 | 1251 | } |
e0007529 | 1252 | EXPORT_SYMBOL(security_sb_set_mnt_opts); |
c9180a57 | 1253 | |
08526a90 PM |
1254 | /** |
1255 | * security_sb_clone_mnt_opts() - Duplicate superblock mount options | |
1256 | * @olddb: source superblock | |
1257 | * @newdb: destination superblock | |
1258 | * @kern_flags: kernel flags (in) | |
1259 | * @set_kern_flags: kernel flags (out) | |
1260 | * | |
1261 | * Copy all security options from a given superblock to another. | |
1262 | * | |
1263 | * Return: Returns 0 on success, error on failure. | |
1264 | */ | |
094f7b69 | 1265 | int security_sb_clone_mnt_opts(const struct super_block *oldsb, |
0b4d3452 SM |
1266 | struct super_block *newsb, |
1267 | unsigned long kern_flags, | |
1268 | unsigned long *set_kern_flags) | |
c9180a57 | 1269 | { |
0b4d3452 SM |
1270 | return call_int_hook(sb_clone_mnt_opts, 0, oldsb, newsb, |
1271 | kern_flags, set_kern_flags); | |
c9180a57 | 1272 | } |
e0007529 EP |
1273 | EXPORT_SYMBOL(security_sb_clone_mnt_opts); |
1274 | ||
08526a90 PM |
1275 | /** |
1276 | * security_move_mount() - Check permissions for moving a mount | |
1277 | * @from_path: source mount point | |
1278 | * @to_path: destination mount point | |
1279 | * | |
1280 | * Check permission before a mount is moved. | |
1281 | * | |
1282 | * Return: Returns 0 if permission is granted. | |
1283 | */ | |
2db154b3 DH |
1284 | int security_move_mount(const struct path *from_path, const struct path *to_path) |
1285 | { | |
1286 | return call_int_hook(move_mount, 0, from_path, to_path); | |
1287 | } | |
1288 | ||
916e3258 PM |
1289 | /** |
1290 | * security_path_notify() - Check if setting a watch is allowed | |
1291 | * @path: file path | |
1292 | * @mask: event mask | |
1293 | * @obj_type: file path type | |
1294 | * | |
1295 | * Check permissions before setting a watch on events as defined by @mask, on | |
1296 | * an object at @path, whose type is defined by @obj_type. | |
1297 | * | |
1298 | * Return: Returns 0 if permission is granted. | |
1299 | */ | |
ac5656d8 AG |
1300 | int security_path_notify(const struct path *path, u64 mask, |
1301 | unsigned int obj_type) | |
1302 | { | |
1303 | return call_int_hook(path_notify, 0, path, mask, obj_type); | |
1304 | } | |
1305 | ||
916e3258 PM |
1306 | /** |
1307 | * security_inode_alloc() - Allocate an inode LSM blob | |
1308 | * @inode: the inode | |
1309 | * | |
1310 | * Allocate and attach a security structure to @inode->i_security. The | |
1311 | * i_security field is initialized to NULL when the inode structure is | |
1312 | * allocated. | |
1313 | * | |
1314 | * Return: Return 0 if operation was successful. | |
1315 | */ | |
20510f2f JM |
1316 | int security_inode_alloc(struct inode *inode) |
1317 | { | |
afb1cbe3 CS |
1318 | int rc = lsm_inode_alloc(inode); |
1319 | ||
1320 | if (unlikely(rc)) | |
1321 | return rc; | |
1322 | rc = call_int_hook(inode_alloc_security, 0, inode); | |
1323 | if (unlikely(rc)) | |
1324 | security_inode_free(inode); | |
1325 | return rc; | |
1326 | } | |
1327 | ||
1328 | static void inode_free_by_rcu(struct rcu_head *head) | |
1329 | { | |
1330 | /* | |
1331 | * The rcu head is at the start of the inode blob | |
1332 | */ | |
1333 | kmem_cache_free(lsm_inode_cache, head); | |
20510f2f JM |
1334 | } |
1335 | ||
916e3258 PM |
1336 | /** |
1337 | * security_inode_free() - Free an inode's LSM blob | |
1338 | * @inode: the inode | |
1339 | * | |
1340 | * Deallocate the inode security structure and set @inode->i_security to NULL. | |
1341 | */ | |
20510f2f JM |
1342 | void security_inode_free(struct inode *inode) |
1343 | { | |
f381c272 | 1344 | integrity_inode_free(inode); |
f25fce3e | 1345 | call_void_hook(inode_free_security, inode); |
afb1cbe3 CS |
1346 | /* |
1347 | * The inode may still be referenced in a path walk and | |
1348 | * a call to security_inode_permission() can be made | |
1349 | * after inode_free_security() is called. Ideally, the VFS | |
1350 | * wouldn't do this, but fixing that is a much harder | |
1351 | * job. For now, simply free the i_security via RCU, and | |
1352 | * leave the current inode->i_security pointer intact. | |
1353 | * The inode will be freed after the RCU grace period too. | |
1354 | */ | |
1355 | if (inode->i_security) | |
1356 | call_rcu((struct rcu_head *)inode->i_security, | |
1357 | inode_free_by_rcu); | |
20510f2f JM |
1358 | } |
1359 | ||
08526a90 PM |
1360 | /** |
1361 | * security_dentry_init_security() - Perform dentry initialization | |
1362 | * @dentry: the dentry to initialize | |
1363 | * @mode: mode used to determine resource type | |
1364 | * @name: name of the last path component | |
1365 | * @xattr_name: name of the security/LSM xattr | |
1366 | * @ctx: pointer to the resulting LSM context | |
1367 | * @ctxlen: length of @ctx | |
1368 | * | |
1369 | * Compute a context for a dentry as the inode is not yet available since NFSv4 | |
1370 | * has no label backed by an EA anyway. It is important to note that | |
1371 | * @xattr_name does not need to be free'd by the caller, it is a static string. | |
1372 | * | |
1373 | * Return: Returns 0 on success, negative values on failure. | |
1374 | */ | |
d47be3df | 1375 | int security_dentry_init_security(struct dentry *dentry, int mode, |
15bf3239 VG |
1376 | const struct qstr *name, |
1377 | const char **xattr_name, void **ctx, | |
1378 | u32 *ctxlen) | |
d47be3df | 1379 | { |
7f5056b9 VG |
1380 | struct security_hook_list *hp; |
1381 | int rc; | |
1382 | ||
1383 | /* | |
1384 | * Only one module will provide a security context. | |
1385 | */ | |
1386 | hlist_for_each_entry(hp, &security_hook_heads.dentry_init_security, list) { | |
1387 | rc = hp->hook.dentry_init_security(dentry, mode, name, | |
1388 | xattr_name, ctx, ctxlen); | |
1389 | if (rc != LSM_RET_DEFAULT(dentry_init_security)) | |
1390 | return rc; | |
1391 | } | |
1392 | return LSM_RET_DEFAULT(dentry_init_security); | |
d47be3df DQ |
1393 | } |
1394 | EXPORT_SYMBOL(security_dentry_init_security); | |
1395 | ||
08526a90 PM |
1396 | /** |
1397 | * security_dentry_create_files_as() - Perform dentry initialization | |
1398 | * @dentry: the dentry to initialize | |
1399 | * @mode: mode used to determine resource type | |
1400 | * @name: name of the last path component | |
1401 | * @old: creds to use for LSM context calculations | |
1402 | * @new: creds to modify | |
1403 | * | |
1404 | * Compute a context for a dentry as the inode is not yet available and set | |
1405 | * that context in passed in creds so that new files are created using that | |
1406 | * context. Context is calculated using the passed in creds and not the creds | |
1407 | * of the caller. | |
1408 | * | |
1409 | * Return: Returns 0 on success, error on failure. | |
1410 | */ | |
2602625b VG |
1411 | int security_dentry_create_files_as(struct dentry *dentry, int mode, |
1412 | struct qstr *name, | |
1413 | const struct cred *old, struct cred *new) | |
1414 | { | |
1415 | return call_int_hook(dentry_create_files_as, 0, dentry, mode, | |
1416 | name, old, new); | |
1417 | } | |
1418 | EXPORT_SYMBOL(security_dentry_create_files_as); | |
1419 | ||
916e3258 PM |
1420 | /** |
1421 | * security_inode_init_security() - Initialize an inode's LSM context | |
1422 | * @inode: the inode | |
1423 | * @dir: parent directory | |
1424 | * @qstr: last component of the pathname | |
1425 | * @initxattrs: callback function to write xattrs | |
1426 | * @fs_data: filesystem specific data | |
1427 | * | |
1428 | * Obtain the security attribute name suffix and value to set on a newly | |
1429 | * created inode and set up the incore security field for the new inode. This | |
1430 | * hook is called by the fs code as part of the inode creation transaction and | |
1431 | * provides for atomic labeling of the inode, unlike the post_create/mkdir/... | |
1432 | * hooks called by the VFS. The hook function is expected to allocate the name | |
1433 | * and value via kmalloc, with the caller being responsible for calling kfree | |
1434 | * after using them. If the security module does not use security attributes | |
1435 | * or does not wish to put a security attribute on this particular inode, then | |
1436 | * it should return -EOPNOTSUPP to skip this processing. | |
1437 | * | |
1438 | * Return: Returns 0 on success, -EOPNOTSUPP if no security attribute is | |
1439 | * needed, or -ENOMEM on memory allocation failure. | |
1440 | */ | |
20510f2f | 1441 | int security_inode_init_security(struct inode *inode, struct inode *dir, |
9d8f13ba MZ |
1442 | const struct qstr *qstr, |
1443 | const initxattrs initxattrs, void *fs_data) | |
20510f2f | 1444 | { |
823eb1cc MZ |
1445 | struct xattr new_xattrs[MAX_LSM_EVM_XATTR + 1]; |
1446 | struct xattr *lsm_xattr, *evm_xattr, *xattr; | |
9d8f13ba MZ |
1447 | int ret; |
1448 | ||
20510f2f | 1449 | if (unlikely(IS_PRIVATE(inode))) |
fb88c2b6 | 1450 | return 0; |
9d8f13ba | 1451 | |
9d8f13ba | 1452 | if (!initxattrs) |
e308fd3b JB |
1453 | return call_int_hook(inode_init_security, -EOPNOTSUPP, inode, |
1454 | dir, qstr, NULL, NULL, NULL); | |
9548906b | 1455 | memset(new_xattrs, 0, sizeof(new_xattrs)); |
9d8f13ba | 1456 | lsm_xattr = new_xattrs; |
b1d9e6b0 | 1457 | ret = call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir, qstr, |
9d8f13ba MZ |
1458 | &lsm_xattr->name, |
1459 | &lsm_xattr->value, | |
1460 | &lsm_xattr->value_len); | |
1461 | if (ret) | |
1462 | goto out; | |
823eb1cc MZ |
1463 | |
1464 | evm_xattr = lsm_xattr + 1; | |
1465 | ret = evm_inode_init_security(inode, lsm_xattr, evm_xattr); | |
1466 | if (ret) | |
1467 | goto out; | |
9d8f13ba MZ |
1468 | ret = initxattrs(inode, new_xattrs, fs_data); |
1469 | out: | |
9548906b | 1470 | for (xattr = new_xattrs; xattr->value != NULL; xattr++) |
823eb1cc | 1471 | kfree(xattr->value); |
9d8f13ba MZ |
1472 | return (ret == -EOPNOTSUPP) ? 0 : ret; |
1473 | } | |
1474 | EXPORT_SYMBOL(security_inode_init_security); | |
1475 | ||
916e3258 PM |
1476 | /** |
1477 | * security_inode_init_security_anon() - Initialize an anonymous inode | |
1478 | * @inode: the inode | |
1479 | * @name: the anonymous inode class | |
1480 | * @context_inode: an optional related inode | |
1481 | * | |
1482 | * Set up the incore security field for the new anonymous inode and return | |
1483 | * whether the inode creation is permitted by the security module or not. | |
1484 | * | |
1485 | * Return: Returns 0 on success, -EACCES if the security module denies the | |
1486 | * creation of this inode, or another -errno upon other errors. | |
1487 | */ | |
215b674b LG |
1488 | int security_inode_init_security_anon(struct inode *inode, |
1489 | const struct qstr *name, | |
1490 | const struct inode *context_inode) | |
1491 | { | |
1492 | return call_int_hook(inode_init_security_anon, 0, inode, name, | |
1493 | context_inode); | |
1494 | } | |
1495 | ||
9d8f13ba | 1496 | int security_old_inode_init_security(struct inode *inode, struct inode *dir, |
9548906b | 1497 | const struct qstr *qstr, const char **name, |
9d8f13ba | 1498 | void **value, size_t *len) |
20510f2f JM |
1499 | { |
1500 | if (unlikely(IS_PRIVATE(inode))) | |
30e05324 | 1501 | return -EOPNOTSUPP; |
e308fd3b JB |
1502 | return call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir, |
1503 | qstr, name, value, len); | |
20510f2f | 1504 | } |
9d8f13ba | 1505 | EXPORT_SYMBOL(security_old_inode_init_security); |
20510f2f | 1506 | |
be6d3e56 | 1507 | #ifdef CONFIG_SECURITY_PATH |
916e3258 PM |
1508 | /** |
1509 | * security_path_mknod() - Check if creating a special file is allowed | |
1510 | * @dir: parent directory | |
1511 | * @dentry: new file | |
1512 | * @mode: new file mode | |
1513 | * @dev: device number | |
1514 | * | |
1515 | * Check permissions when creating a file. Note that this hook is called even | |
1516 | * if mknod operation is being done for a regular file. | |
1517 | * | |
1518 | * Return: Returns 0 if permission is granted. | |
1519 | */ | |
d3607752 | 1520 | int security_path_mknod(const struct path *dir, struct dentry *dentry, umode_t mode, |
be6d3e56 KT |
1521 | unsigned int dev) |
1522 | { | |
c6f493d6 | 1523 | if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) |
be6d3e56 | 1524 | return 0; |
f25fce3e | 1525 | return call_int_hook(path_mknod, 0, dir, dentry, mode, dev); |
be6d3e56 KT |
1526 | } |
1527 | EXPORT_SYMBOL(security_path_mknod); | |
1528 | ||
916e3258 PM |
1529 | /** |
1530 | * security_path_mkdir() - Check if creating a new directory is allowed | |
1531 | * @dir: parent directory | |
1532 | * @dentry: new directory | |
1533 | * @mode: new directory mode | |
1534 | * | |
1535 | * Check permissions to create a new directory in the existing directory. | |
1536 | * | |
1537 | * Return: Returns 0 if permission is granted. | |
1538 | */ | |
d3607752 | 1539 | int security_path_mkdir(const struct path *dir, struct dentry *dentry, umode_t mode) |
be6d3e56 | 1540 | { |
c6f493d6 | 1541 | if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) |
be6d3e56 | 1542 | return 0; |
f25fce3e | 1543 | return call_int_hook(path_mkdir, 0, dir, dentry, mode); |
be6d3e56 | 1544 | } |
82140443 | 1545 | EXPORT_SYMBOL(security_path_mkdir); |
be6d3e56 | 1546 | |
916e3258 PM |
1547 | /** |
1548 | * security_path_rmdir() - Check if removing a directory is allowed | |
1549 | * @dir: parent directory | |
1550 | * @dentry: directory to remove | |
1551 | * | |
1552 | * Check the permission to remove a directory. | |
1553 | * | |
1554 | * Return: Returns 0 if permission is granted. | |
1555 | */ | |
989f74e0 | 1556 | int security_path_rmdir(const struct path *dir, struct dentry *dentry) |
be6d3e56 | 1557 | { |
c6f493d6 | 1558 | if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) |
be6d3e56 | 1559 | return 0; |
f25fce3e | 1560 | return call_int_hook(path_rmdir, 0, dir, dentry); |
be6d3e56 KT |
1561 | } |
1562 | ||
916e3258 PM |
1563 | /** |
1564 | * security_path_unlink() - Check if removing a hard link is allowed | |
1565 | * @dir: parent directory | |
1566 | * @dentry: file | |
1567 | * | |
1568 | * Check the permission to remove a hard link to a file. | |
1569 | * | |
1570 | * Return: Returns 0 if permission is granted. | |
1571 | */ | |
989f74e0 | 1572 | int security_path_unlink(const struct path *dir, struct dentry *dentry) |
be6d3e56 | 1573 | { |
c6f493d6 | 1574 | if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) |
be6d3e56 | 1575 | return 0; |
f25fce3e | 1576 | return call_int_hook(path_unlink, 0, dir, dentry); |
be6d3e56 | 1577 | } |
82140443 | 1578 | EXPORT_SYMBOL(security_path_unlink); |
be6d3e56 | 1579 | |
916e3258 PM |
1580 | /** |
1581 | * security_path_symlink() - Check if creating a symbolic link is allowed | |
1582 | * @dir: parent directory | |
1583 | * @dentry: symbolic link | |
1584 | * @old_name: file pathname | |
1585 | * | |
1586 | * Check the permission to create a symbolic link to a file. | |
1587 | * | |
1588 | * Return: Returns 0 if permission is granted. | |
1589 | */ | |
d3607752 | 1590 | int security_path_symlink(const struct path *dir, struct dentry *dentry, |
be6d3e56 KT |
1591 | const char *old_name) |
1592 | { | |
c6f493d6 | 1593 | if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) |
be6d3e56 | 1594 | return 0; |
f25fce3e | 1595 | return call_int_hook(path_symlink, 0, dir, dentry, old_name); |
be6d3e56 KT |
1596 | } |
1597 | ||
916e3258 PM |
1598 | /** |
1599 | * security_path_link - Check if creating a hard link is allowed | |
1600 | * @old_dentry: existing file | |
1601 | * @new_dir: new parent directory | |
1602 | * @new_dentry: new link | |
1603 | * | |
1604 | * Check permission before creating a new hard link to a file. | |
1605 | * | |
1606 | * Return: Returns 0 if permission is granted. | |
1607 | */ | |
3ccee46a | 1608 | int security_path_link(struct dentry *old_dentry, const struct path *new_dir, |
be6d3e56 KT |
1609 | struct dentry *new_dentry) |
1610 | { | |
c6f493d6 | 1611 | if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)))) |
be6d3e56 | 1612 | return 0; |
f25fce3e | 1613 | return call_int_hook(path_link, 0, old_dentry, new_dir, new_dentry); |
be6d3e56 KT |
1614 | } |
1615 | ||
916e3258 PM |
1616 | /** |
1617 | * security_path_rename() - Check if renaming a file is allowed | |
1618 | * @old_dir: parent directory of the old file | |
1619 | * @old_dentry: the old file | |
1620 | * @new_dir: parent directory of the new file | |
1621 | * @new_dentry: the new file | |
1622 | * @flags: flags | |
1623 | * | |
1624 | * Check for permission to rename a file or directory. | |
1625 | * | |
1626 | * Return: Returns 0 if permission is granted. | |
1627 | */ | |
3ccee46a AV |
1628 | int security_path_rename(const struct path *old_dir, struct dentry *old_dentry, |
1629 | const struct path *new_dir, struct dentry *new_dentry, | |
0b3974eb | 1630 | unsigned int flags) |
be6d3e56 | 1631 | { |
c6f493d6 DH |
1632 | if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) || |
1633 | (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry))))) | |
be6d3e56 | 1634 | return 0; |
da1ce067 | 1635 | |
f25fce3e | 1636 | return call_int_hook(path_rename, 0, old_dir, old_dentry, new_dir, |
100f59d9 | 1637 | new_dentry, flags); |
be6d3e56 | 1638 | } |
82140443 | 1639 | EXPORT_SYMBOL(security_path_rename); |
be6d3e56 | 1640 | |
916e3258 PM |
1641 | /** |
1642 | * security_path_truncate() - Check if truncating a file is allowed | |
1643 | * @path: file | |
1644 | * | |
1645 | * Check permission before truncating the file indicated by path. Note that | |
1646 | * truncation permissions may also be checked based on already opened files, | |
1647 | * using the security_file_truncate() hook. | |
1648 | * | |
1649 | * Return: Returns 0 if permission is granted. | |
1650 | */ | |
81f4c506 | 1651 | int security_path_truncate(const struct path *path) |
be6d3e56 | 1652 | { |
c6f493d6 | 1653 | if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) |
be6d3e56 | 1654 | return 0; |
f25fce3e | 1655 | return call_int_hook(path_truncate, 0, path); |
be6d3e56 | 1656 | } |
89eda068 | 1657 | |
916e3258 PM |
1658 | /** |
1659 | * security_path_chmod() - Check if changing the file's mode is allowed | |
1660 | * @path: file | |
1661 | * @mode: new mode | |
1662 | * | |
1663 | * Check for permission to change a mode of the file @path. The new mode is | |
1664 | * specified in @mode which is a bitmask of constants from | |
1665 | * <include/uapi/linux/stat.h>. | |
1666 | * | |
1667 | * Return: Returns 0 if permission is granted. | |
1668 | */ | |
be01f9f2 | 1669 | int security_path_chmod(const struct path *path, umode_t mode) |
89eda068 | 1670 | { |
c6f493d6 | 1671 | if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) |
89eda068 | 1672 | return 0; |
f25fce3e | 1673 | return call_int_hook(path_chmod, 0, path, mode); |
89eda068 TH |
1674 | } |
1675 | ||
916e3258 PM |
1676 | /** |
1677 | * security_path_chown() - Check if changing the file's owner/group is allowed | |
1678 | * @path: file | |
1679 | * @uid: file owner | |
1680 | * @gid: file group | |
1681 | * | |
1682 | * Check for permission to change owner/group of a file or directory. | |
1683 | * | |
1684 | * Return: Returns 0 if permission is granted. | |
1685 | */ | |
7fd25dac | 1686 | int security_path_chown(const struct path *path, kuid_t uid, kgid_t gid) |
89eda068 | 1687 | { |
c6f493d6 | 1688 | if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) |
89eda068 | 1689 | return 0; |
f25fce3e | 1690 | return call_int_hook(path_chown, 0, path, uid, gid); |
89eda068 | 1691 | } |
8b8efb44 | 1692 | |
916e3258 PM |
1693 | /** |
1694 | * security_path_chroot() - Check if changing the root directory is allowed | |
1695 | * @path: directory | |
1696 | * | |
1697 | * Check for permission to change root directory. | |
1698 | * | |
1699 | * Return: Returns 0 if permission is granted. | |
1700 | */ | |
77b286c0 | 1701 | int security_path_chroot(const struct path *path) |
8b8efb44 | 1702 | { |
f25fce3e | 1703 | return call_int_hook(path_chroot, 0, path); |
8b8efb44 | 1704 | } |
be6d3e56 KT |
1705 | #endif |
1706 | ||
916e3258 PM |
1707 | /** |
1708 | * security_inode_create() - Check if creating a file is allowed | |
1709 | * @dir: the parent directory | |
1710 | * @dentry: the file being created | |
1711 | * @mode: requested file mode | |
1712 | * | |
1713 | * Check permission to create a regular file. | |
1714 | * | |
1715 | * Return: Returns 0 if permission is granted. | |
1716 | */ | |
4acdaf27 | 1717 | int security_inode_create(struct inode *dir, struct dentry *dentry, umode_t mode) |
20510f2f JM |
1718 | { |
1719 | if (unlikely(IS_PRIVATE(dir))) | |
1720 | return 0; | |
f25fce3e | 1721 | return call_int_hook(inode_create, 0, dir, dentry, mode); |
20510f2f | 1722 | } |
800a9647 | 1723 | EXPORT_SYMBOL_GPL(security_inode_create); |
20510f2f | 1724 | |
916e3258 PM |
1725 | /** |
1726 | * security_inode_link() - Check if creating a hard link is allowed | |
1727 | * @old_dentry: existing file | |
1728 | * @dir: new parent directory | |
1729 | * @new_dentry: new link | |
1730 | * | |
1731 | * Check permission before creating a new hard link to a file. | |
1732 | * | |
1733 | * Return: Returns 0 if permission is granted. | |
1734 | */ | |
20510f2f JM |
1735 | int security_inode_link(struct dentry *old_dentry, struct inode *dir, |
1736 | struct dentry *new_dentry) | |
1737 | { | |
c6f493d6 | 1738 | if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)))) |
20510f2f | 1739 | return 0; |
f25fce3e | 1740 | return call_int_hook(inode_link, 0, old_dentry, dir, new_dentry); |
20510f2f JM |
1741 | } |
1742 | ||
916e3258 PM |
1743 | /** |
1744 | * security_inode_unlink() - Check if removing a hard link is allowed | |
1745 | * @dir: parent directory | |
1746 | * @dentry: file | |
1747 | * | |
1748 | * Check the permission to remove a hard link to a file. | |
1749 | * | |
1750 | * Return: Returns 0 if permission is granted. | |
1751 | */ | |
20510f2f JM |
1752 | int security_inode_unlink(struct inode *dir, struct dentry *dentry) |
1753 | { | |
c6f493d6 | 1754 | if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) |
20510f2f | 1755 | return 0; |
f25fce3e | 1756 | return call_int_hook(inode_unlink, 0, dir, dentry); |
20510f2f JM |
1757 | } |
1758 | ||
916e3258 PM |
1759 | /** |
1760 | * security_inode_symlink() Check if creating a symbolic link is allowed | |
1761 | * @dir: parent directory | |
1762 | * @dentry: symbolic link | |
1763 | * @old_name: existing filename | |
1764 | * | |
1765 | * Check the permission to create a symbolic link to a file. | |
1766 | * | |
1767 | * Return: Returns 0 if permission is granted. | |
1768 | */ | |
20510f2f JM |
1769 | int security_inode_symlink(struct inode *dir, struct dentry *dentry, |
1770 | const char *old_name) | |
1771 | { | |
1772 | if (unlikely(IS_PRIVATE(dir))) | |
1773 | return 0; | |
f25fce3e | 1774 | return call_int_hook(inode_symlink, 0, dir, dentry, old_name); |
20510f2f JM |
1775 | } |
1776 | ||
916e3258 PM |
1777 | /** |
1778 | * security_inode_mkdir() - Check if creation a new director is allowed | |
1779 | * @dir: parent directory | |
1780 | * @dentry: new directory | |
1781 | * @mode: new directory mode | |
1782 | * | |
1783 | * Check permissions to create a new directory in the existing directory | |
1784 | * associated with inode structure @dir. | |
1785 | * | |
1786 | * Return: Returns 0 if permission is granted. | |
1787 | */ | |
18bb1db3 | 1788 | int security_inode_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
20510f2f JM |
1789 | { |
1790 | if (unlikely(IS_PRIVATE(dir))) | |
1791 | return 0; | |
f25fce3e | 1792 | return call_int_hook(inode_mkdir, 0, dir, dentry, mode); |
20510f2f | 1793 | } |
800a9647 | 1794 | EXPORT_SYMBOL_GPL(security_inode_mkdir); |
20510f2f | 1795 | |
916e3258 PM |
1796 | /** |
1797 | * security_inode_rmdir() - Check if removing a directory is allowed | |
1798 | * @dir: parent directory | |
1799 | * @dentry: directory to be removed | |
1800 | * | |
1801 | * Check the permission to remove a directory. | |
1802 | * | |
1803 | * Return: Returns 0 if permission is granted. | |
1804 | */ | |
20510f2f JM |
1805 | int security_inode_rmdir(struct inode *dir, struct dentry *dentry) |
1806 | { | |
c6f493d6 | 1807 | if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) |
20510f2f | 1808 | return 0; |
f25fce3e | 1809 | return call_int_hook(inode_rmdir, 0, dir, dentry); |
20510f2f JM |
1810 | } |
1811 | ||
916e3258 PM |
1812 | /** |
1813 | * security_inode_mknod() - Check if creating a special file is allowed | |
1814 | * @dir: parent directory | |
1815 | * @dentry: new file | |
1816 | * @mode: new file mode | |
1817 | * @dev: device number | |
1818 | * | |
1819 | * Check permissions when creating a special file (or a socket or a fifo file | |
1820 | * created via the mknod system call). Note that if mknod operation is being | |
1821 | * done for a regular file, then the create hook will be called and not this | |
1822 | * hook. | |
1823 | * | |
1824 | * Return: Returns 0 if permission is granted. | |
1825 | */ | |
1a67aafb | 1826 | int security_inode_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev) |
20510f2f JM |
1827 | { |
1828 | if (unlikely(IS_PRIVATE(dir))) | |
1829 | return 0; | |
f25fce3e | 1830 | return call_int_hook(inode_mknod, 0, dir, dentry, mode, dev); |
20510f2f JM |
1831 | } |
1832 | ||
916e3258 PM |
1833 | /** |
1834 | * security_inode_rename() - Check if renaming a file is allowed | |
1835 | * @old_dir: parent directory of the old file | |
1836 | * @old_dentry: the old file | |
1837 | * @new_dir: parent directory of the new file | |
1838 | * @new_dentry: the new file | |
1839 | * @flags: flags | |
1840 | * | |
1841 | * Check for permission to rename a file or directory. | |
1842 | * | |
1843 | * Return: Returns 0 if permission is granted. | |
1844 | */ | |
20510f2f | 1845 | int security_inode_rename(struct inode *old_dir, struct dentry *old_dentry, |
0b3974eb MS |
1846 | struct inode *new_dir, struct dentry *new_dentry, |
1847 | unsigned int flags) | |
20510f2f | 1848 | { |
c6f493d6 DH |
1849 | if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) || |
1850 | (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry))))) | |
20510f2f | 1851 | return 0; |
da1ce067 MS |
1852 | |
1853 | if (flags & RENAME_EXCHANGE) { | |
f25fce3e | 1854 | int err = call_int_hook(inode_rename, 0, new_dir, new_dentry, |
da1ce067 MS |
1855 | old_dir, old_dentry); |
1856 | if (err) | |
1857 | return err; | |
1858 | } | |
1859 | ||
f25fce3e | 1860 | return call_int_hook(inode_rename, 0, old_dir, old_dentry, |
20510f2f JM |
1861 | new_dir, new_dentry); |
1862 | } | |
1863 | ||
916e3258 PM |
1864 | /** |
1865 | * security_inode_readlink() - Check if reading a symbolic link is allowed | |
1866 | * @dentry: link | |
1867 | * | |
1868 | * Check the permission to read the symbolic link. | |
1869 | * | |
1870 | * Return: Returns 0 if permission is granted. | |
1871 | */ | |
20510f2f JM |
1872 | int security_inode_readlink(struct dentry *dentry) |
1873 | { | |
c6f493d6 | 1874 | if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) |
20510f2f | 1875 | return 0; |
f25fce3e | 1876 | return call_int_hook(inode_readlink, 0, dentry); |
20510f2f JM |
1877 | } |
1878 | ||
916e3258 PM |
1879 | /** |
1880 | * security_inode_follow_link() - Check if following a symbolic link is allowed | |
1881 | * @dentry: link dentry | |
1882 | * @inode: link inode | |
1883 | * @rcu: true if in RCU-walk mode | |
1884 | * | |
1885 | * Check permission to follow a symbolic link when looking up a pathname. If | |
1886 | * @rcu is true, @inode is not stable. | |
1887 | * | |
1888 | * Return: Returns 0 if permission is granted. | |
1889 | */ | |
bda0be7a N |
1890 | int security_inode_follow_link(struct dentry *dentry, struct inode *inode, |
1891 | bool rcu) | |
20510f2f | 1892 | { |
bda0be7a | 1893 | if (unlikely(IS_PRIVATE(inode))) |
20510f2f | 1894 | return 0; |
e22619a2 | 1895 | return call_int_hook(inode_follow_link, 0, dentry, inode, rcu); |
20510f2f JM |
1896 | } |
1897 | ||
916e3258 PM |
1898 | /** |
1899 | * security_inode_permission() - Check if accessing an inode is allowed | |
1900 | * @inode: inode | |
1901 | * @mask: access mask | |
1902 | * | |
1903 | * Check permission before accessing an inode. This hook is called by the | |
1904 | * existing Linux permission function, so a security module can use it to | |
1905 | * provide additional checking for existing Linux permission checks. Notice | |
1906 | * that this hook is called when a file is opened (as well as many other | |
1907 | * operations), whereas the file_security_ops permission hook is called when | |
1908 | * the actual read/write operations are performed. | |
1909 | * | |
1910 | * Return: Returns 0 if permission is granted. | |
1911 | */ | |
b77b0646 | 1912 | int security_inode_permission(struct inode *inode, int mask) |
20510f2f JM |
1913 | { |
1914 | if (unlikely(IS_PRIVATE(inode))) | |
1915 | return 0; | |
f25fce3e | 1916 | return call_int_hook(inode_permission, 0, inode, mask); |
20510f2f JM |
1917 | } |
1918 | ||
916e3258 PM |
1919 | /** |
1920 | * security_inode_setattr() - Check if setting file attributes is allowed | |
1921 | * @idmap: idmap of the mount | |
1922 | * @dentry: file | |
1923 | * @attr: new attributes | |
1924 | * | |
1925 | * Check permission before setting file attributes. Note that the kernel call | |
1926 | * to notify_change is performed from several locations, whenever file | |
1927 | * attributes change (such as when a file is truncated, chown/chmod operations, | |
1928 | * transferring disk quotas, etc). | |
1929 | * | |
1930 | * Return: Returns 0 if permission is granted. | |
1931 | */ | |
c1632a0f | 1932 | int security_inode_setattr(struct mnt_idmap *idmap, |
0e363cf3 | 1933 | struct dentry *dentry, struct iattr *attr) |
20510f2f | 1934 | { |
817b54aa MZ |
1935 | int ret; |
1936 | ||
c6f493d6 | 1937 | if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) |
20510f2f | 1938 | return 0; |
f25fce3e | 1939 | ret = call_int_hook(inode_setattr, 0, dentry, attr); |
817b54aa MZ |
1940 | if (ret) |
1941 | return ret; | |
c1632a0f | 1942 | return evm_inode_setattr(idmap, dentry, attr); |
20510f2f | 1943 | } |
b1da47e2 | 1944 | EXPORT_SYMBOL_GPL(security_inode_setattr); |
20510f2f | 1945 | |
916e3258 PM |
1946 | /** |
1947 | * security_inode_getattr() - Check if getting file attributes is allowed | |
1948 | * @path: file | |
1949 | * | |
1950 | * Check permission before obtaining file attributes. | |
1951 | * | |
1952 | * Return: Returns 0 if permission is granted. | |
1953 | */ | |
3f7036a0 | 1954 | int security_inode_getattr(const struct path *path) |
20510f2f | 1955 | { |
c6f493d6 | 1956 | if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) |
20510f2f | 1957 | return 0; |
f25fce3e | 1958 | return call_int_hook(inode_getattr, 0, path); |
20510f2f JM |
1959 | } |
1960 | ||
916e3258 PM |
1961 | /** |
1962 | * security_inode_setxattr() - Check if setting file xattrs is allowed | |
1963 | * @idmap: idmap of the mount | |
1964 | * @dentry: file | |
1965 | * @name: xattr name | |
1966 | * @value: xattr value | |
1967 | * @flags: flags | |
1968 | * | |
1969 | * Check permission before setting the extended attributes. | |
1970 | * | |
1971 | * Return: Returns 0 if permission is granted. | |
1972 | */ | |
39f60c1c | 1973 | int security_inode_setxattr(struct mnt_idmap *idmap, |
71bc356f | 1974 | struct dentry *dentry, const char *name, |
8f0cfa52 | 1975 | const void *value, size_t size, int flags) |
20510f2f | 1976 | { |
3e1be52d MZ |
1977 | int ret; |
1978 | ||
c6f493d6 | 1979 | if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) |
20510f2f | 1980 | return 0; |
b1d9e6b0 CS |
1981 | /* |
1982 | * SELinux and Smack integrate the cap call, | |
1983 | * so assume that all LSMs supplying this call do so. | |
1984 | */ | |
39f60c1c | 1985 | ret = call_int_hook(inode_setxattr, 1, idmap, dentry, name, value, |
71bc356f | 1986 | size, flags); |
b1d9e6b0 CS |
1987 | |
1988 | if (ret == 1) | |
1989 | ret = cap_inode_setxattr(dentry, name, value, size, flags); | |
42c63330 MZ |
1990 | if (ret) |
1991 | return ret; | |
1992 | ret = ima_inode_setxattr(dentry, name, value, size); | |
3e1be52d MZ |
1993 | if (ret) |
1994 | return ret; | |
39f60c1c | 1995 | return evm_inode_setxattr(idmap, dentry, name, value, size); |
20510f2f JM |
1996 | } |
1997 | ||
916e3258 PM |
1998 | /** |
1999 | * security_inode_set_acl() - Check if setting posix acls is allowed | |
2000 | * @idmap: idmap of the mount | |
2001 | * @dentry: file | |
2002 | * @acl_name: acl name | |
2003 | * @kacl: acl struct | |
2004 | * | |
2005 | * Check permission before setting posix acls, the posix acls in @kacl are | |
2006 | * identified by @acl_name. | |
2007 | * | |
2008 | * Return: Returns 0 if permission is granted. | |
2009 | */ | |
700b7940 | 2010 | int security_inode_set_acl(struct mnt_idmap *idmap, |
72b3897e CB |
2011 | struct dentry *dentry, const char *acl_name, |
2012 | struct posix_acl *kacl) | |
2013 | { | |
e61b135f CB |
2014 | int ret; |
2015 | ||
72b3897e CB |
2016 | if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) |
2017 | return 0; | |
700b7940 | 2018 | ret = call_int_hook(inode_set_acl, 0, idmap, dentry, acl_name, |
e61b135f CB |
2019 | kacl); |
2020 | if (ret) | |
2021 | return ret; | |
700b7940 | 2022 | ret = ima_inode_set_acl(idmap, dentry, acl_name, kacl); |
e61b135f CB |
2023 | if (ret) |
2024 | return ret; | |
700b7940 | 2025 | return evm_inode_set_acl(idmap, dentry, acl_name, kacl); |
72b3897e CB |
2026 | } |
2027 | ||
916e3258 PM |
2028 | /** |
2029 | * security_inode_get_acl() - Check if reading posix acls is allowed | |
2030 | * @idmap: idmap of the mount | |
2031 | * @dentry: file | |
2032 | * @acl_name: acl name | |
2033 | * | |
2034 | * Check permission before getting osix acls, the posix acls are identified by | |
2035 | * @acl_name. | |
2036 | * | |
2037 | * Return: Returns 0 if permission is granted. | |
2038 | */ | |
700b7940 | 2039 | int security_inode_get_acl(struct mnt_idmap *idmap, |
72b3897e CB |
2040 | struct dentry *dentry, const char *acl_name) |
2041 | { | |
2042 | if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) | |
2043 | return 0; | |
700b7940 | 2044 | return call_int_hook(inode_get_acl, 0, idmap, dentry, acl_name); |
72b3897e CB |
2045 | } |
2046 | ||
916e3258 PM |
2047 | /** |
2048 | * security_inode_remove_acl() - Check if removing a posix acl is allowed | |
2049 | * @idmap: idmap of the mount | |
2050 | * @dentry: file | |
2051 | * @acl_name: acl name | |
2052 | * | |
2053 | * Check permission before removing posix acls, the posix acls are identified | |
2054 | * by @acl_name. | |
2055 | * | |
2056 | * Return: Returns 0 if permission is granted. | |
2057 | */ | |
700b7940 | 2058 | int security_inode_remove_acl(struct mnt_idmap *idmap, |
72b3897e CB |
2059 | struct dentry *dentry, const char *acl_name) |
2060 | { | |
e61b135f CB |
2061 | int ret; |
2062 | ||
72b3897e CB |
2063 | if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) |
2064 | return 0; | |
700b7940 | 2065 | ret = call_int_hook(inode_remove_acl, 0, idmap, dentry, acl_name); |
e61b135f CB |
2066 | if (ret) |
2067 | return ret; | |
700b7940 | 2068 | ret = ima_inode_remove_acl(idmap, dentry, acl_name); |
e61b135f CB |
2069 | if (ret) |
2070 | return ret; | |
700b7940 | 2071 | return evm_inode_remove_acl(idmap, dentry, acl_name); |
72b3897e CB |
2072 | } |
2073 | ||
916e3258 PM |
2074 | /** |
2075 | * security_inode_post_setxattr() - Update the inode after a setxattr operation | |
2076 | * @dentry: file | |
2077 | * @name: xattr name | |
2078 | * @value: xattr value | |
2079 | * @size: xattr value size | |
2080 | * @flags: flags | |
2081 | * | |
2082 | * Update inode security field after successful setxattr operation. | |
2083 | */ | |
8f0cfa52 DH |
2084 | void security_inode_post_setxattr(struct dentry *dentry, const char *name, |
2085 | const void *value, size_t size, int flags) | |
20510f2f | 2086 | { |
c6f493d6 | 2087 | if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) |
20510f2f | 2088 | return; |
f25fce3e | 2089 | call_void_hook(inode_post_setxattr, dentry, name, value, size, flags); |
3e1be52d | 2090 | evm_inode_post_setxattr(dentry, name, value, size); |
20510f2f JM |
2091 | } |
2092 | ||
916e3258 PM |
2093 | /** |
2094 | * security_inode_getxattr() - Check if xattr access is allowed | |
2095 | * @dentry: file | |
2096 | * @name: xattr name | |
2097 | * | |
2098 | * Check permission before obtaining the extended attributes identified by | |
2099 | * @name for @dentry. | |
2100 | * | |
2101 | * Return: Returns 0 if permission is granted. | |
2102 | */ | |
8f0cfa52 | 2103 | int security_inode_getxattr(struct dentry *dentry, const char *name) |
20510f2f | 2104 | { |
c6f493d6 | 2105 | if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) |
20510f2f | 2106 | return 0; |
f25fce3e | 2107 | return call_int_hook(inode_getxattr, 0, dentry, name); |
20510f2f JM |
2108 | } |
2109 | ||
916e3258 PM |
2110 | /** |
2111 | * security_inode_listxattr() - Check if listing xattrs is allowed | |
2112 | * @dentry: file | |
2113 | * | |
2114 | * Check permission before obtaining the list of extended attribute names for | |
2115 | * @dentry. | |
2116 | * | |
2117 | * Return: Returns 0 if permission is granted. | |
2118 | */ | |
20510f2f JM |
2119 | int security_inode_listxattr(struct dentry *dentry) |
2120 | { | |
c6f493d6 | 2121 | if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) |
20510f2f | 2122 | return 0; |
f25fce3e | 2123 | return call_int_hook(inode_listxattr, 0, dentry); |
20510f2f JM |
2124 | } |
2125 | ||
916e3258 PM |
2126 | /** |
2127 | * security_inode_removexattr() - Check if removing an xattr is allowed | |
2128 | * @idmap: idmap of the mount | |
2129 | * @dentry: file | |
2130 | * @name: xattr name | |
2131 | * | |
2132 | * Check permission before removing the extended attribute identified by @name | |
2133 | * for @dentry. | |
2134 | * | |
2135 | * Return: Returns 0 if permission is granted. | |
2136 | */ | |
39f60c1c | 2137 | int security_inode_removexattr(struct mnt_idmap *idmap, |
71bc356f | 2138 | struct dentry *dentry, const char *name) |
20510f2f | 2139 | { |
3e1be52d MZ |
2140 | int ret; |
2141 | ||
c6f493d6 | 2142 | if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) |
20510f2f | 2143 | return 0; |
b1d9e6b0 CS |
2144 | /* |
2145 | * SELinux and Smack integrate the cap call, | |
2146 | * so assume that all LSMs supplying this call do so. | |
2147 | */ | |
39f60c1c | 2148 | ret = call_int_hook(inode_removexattr, 1, idmap, dentry, name); |
b1d9e6b0 | 2149 | if (ret == 1) |
39f60c1c | 2150 | ret = cap_inode_removexattr(idmap, dentry, name); |
42c63330 MZ |
2151 | if (ret) |
2152 | return ret; | |
2153 | ret = ima_inode_removexattr(dentry, name); | |
3e1be52d MZ |
2154 | if (ret) |
2155 | return ret; | |
39f60c1c | 2156 | return evm_inode_removexattr(idmap, dentry, name); |
20510f2f JM |
2157 | } |
2158 | ||
916e3258 PM |
2159 | /** |
2160 | * security_inode_need_killpriv() - Check if security_inode_killpriv() required | |
2161 | * @dentry: associated dentry | |
2162 | * | |
2163 | * Called when an inode has been changed to determine if | |
2164 | * security_inode_killpriv() should be called. | |
2165 | * | |
2166 | * Return: Return <0 on error to abort the inode change operation, return 0 if | |
2167 | * security_inode_killpriv() does not need to be called, return >0 if | |
2168 | * security_inode_killpriv() does need to be called. | |
2169 | */ | |
b5376771 SH |
2170 | int security_inode_need_killpriv(struct dentry *dentry) |
2171 | { | |
f25fce3e | 2172 | return call_int_hook(inode_need_killpriv, 0, dentry); |
b5376771 SH |
2173 | } |
2174 | ||
916e3258 PM |
2175 | /** |
2176 | * security_inode_killpriv() - The setuid bit is removed, update LSM state | |
2177 | * @idmap: idmap of the mount | |
2178 | * @dentry: associated dentry | |
2179 | * | |
2180 | * The @dentry's setuid bit is being removed. Remove similar security labels. | |
2181 | * Called with the dentry->d_inode->i_mutex held. | |
2182 | * | |
2183 | * Return: Return 0 on success. If error is returned, then the operation | |
2184 | * causing setuid bit removal is failed. | |
2185 | */ | |
39f60c1c | 2186 | int security_inode_killpriv(struct mnt_idmap *idmap, |
71bc356f | 2187 | struct dentry *dentry) |
b5376771 | 2188 | { |
39f60c1c | 2189 | return call_int_hook(inode_killpriv, 0, idmap, dentry); |
b5376771 SH |
2190 | } |
2191 | ||
916e3258 PM |
2192 | /** |
2193 | * security_inode_getsecurity() - Get the xattr security label of an inode | |
2194 | * @idmap: idmap of the mount | |
2195 | * @inode: inode | |
2196 | * @name: xattr name | |
2197 | * @buffer: security label buffer | |
2198 | * @alloc: allocation flag | |
2199 | * | |
2200 | * Retrieve a copy of the extended attribute representation of the security | |
2201 | * label associated with @name for @inode via @buffer. Note that @name is the | |
2202 | * remainder of the attribute name after the security prefix has been removed. | |
2203 | * @alloc is used to specify if the call should return a value via the buffer | |
2204 | * or just the value length. | |
2205 | * | |
2206 | * Return: Returns size of buffer on success. | |
2207 | */ | |
4609e1f1 | 2208 | int security_inode_getsecurity(struct mnt_idmap *idmap, |
71bc356f CB |
2209 | struct inode *inode, const char *name, |
2210 | void **buffer, bool alloc) | |
20510f2f | 2211 | { |
2885c1e3 CS |
2212 | struct security_hook_list *hp; |
2213 | int rc; | |
2214 | ||
20510f2f | 2215 | if (unlikely(IS_PRIVATE(inode))) |
98e828a0 | 2216 | return LSM_RET_DEFAULT(inode_getsecurity); |
2885c1e3 CS |
2217 | /* |
2218 | * Only one module will provide an attribute with a given name. | |
2219 | */ | |
df0ce173 | 2220 | hlist_for_each_entry(hp, &security_hook_heads.inode_getsecurity, list) { |
4609e1f1 | 2221 | rc = hp->hook.inode_getsecurity(idmap, inode, name, buffer, alloc); |
98e828a0 | 2222 | if (rc != LSM_RET_DEFAULT(inode_getsecurity)) |
2885c1e3 CS |
2223 | return rc; |
2224 | } | |
98e828a0 | 2225 | return LSM_RET_DEFAULT(inode_getsecurity); |
20510f2f JM |
2226 | } |
2227 | ||
916e3258 PM |
2228 | /** |
2229 | * security_inode_setsecurity() - Set the xattr security label of an inode | |
2230 | * @inode: inode | |
2231 | * @name: xattr name | |
2232 | * @value: security label | |
2233 | * @size: length of security label | |
2234 | * @flags: flags | |
2235 | * | |
2236 | * Set the security label associated with @name for @inode from the extended | |
2237 | * attribute value @value. @size indicates the size of the @value in bytes. | |
2238 | * @flags may be XATTR_CREATE, XATTR_REPLACE, or 0. Note that @name is the | |
2239 | * remainder of the attribute name after the security. prefix has been removed. | |
2240 | * | |
2241 | * Return: Returns 0 on success. | |
2242 | */ | |
20510f2f JM |
2243 | int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags) |
2244 | { | |
2885c1e3 CS |
2245 | struct security_hook_list *hp; |
2246 | int rc; | |
2247 | ||
20510f2f | 2248 | if (unlikely(IS_PRIVATE(inode))) |
98e828a0 | 2249 | return LSM_RET_DEFAULT(inode_setsecurity); |
2885c1e3 CS |
2250 | /* |
2251 | * Only one module will provide an attribute with a given name. | |
2252 | */ | |
df0ce173 | 2253 | hlist_for_each_entry(hp, &security_hook_heads.inode_setsecurity, list) { |
2885c1e3 CS |
2254 | rc = hp->hook.inode_setsecurity(inode, name, value, size, |
2255 | flags); | |
98e828a0 | 2256 | if (rc != LSM_RET_DEFAULT(inode_setsecurity)) |
2885c1e3 CS |
2257 | return rc; |
2258 | } | |
98e828a0 | 2259 | return LSM_RET_DEFAULT(inode_setsecurity); |
20510f2f JM |
2260 | } |
2261 | ||
916e3258 PM |
2262 | /** |
2263 | * security_inode_listsecurity() - List the xattr security label names | |
2264 | * @inode: inode | |
2265 | * @buffer: buffer | |
2266 | * @buffer_size: size of buffer | |
2267 | * | |
2268 | * Copy the extended attribute names for the security labels associated with | |
2269 | * @inode into @buffer. The maximum size of @buffer is specified by | |
2270 | * @buffer_size. @buffer may be NULL to request the size of the buffer | |
2271 | * required. | |
2272 | * | |
2273 | * Return: Returns number of bytes used/required on success. | |
2274 | */ | |
20510f2f JM |
2275 | int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size) |
2276 | { | |
2277 | if (unlikely(IS_PRIVATE(inode))) | |
2278 | return 0; | |
f25fce3e | 2279 | return call_int_hook(inode_listsecurity, 0, inode, buffer, buffer_size); |
20510f2f | 2280 | } |
c9bccef6 | 2281 | EXPORT_SYMBOL(security_inode_listsecurity); |
20510f2f | 2282 | |
916e3258 PM |
2283 | /** |
2284 | * security_inode_getsecid() - Get an inode's secid | |
2285 | * @inode: inode | |
2286 | * @secid: secid to return | |
2287 | * | |
2288 | * Get the secid associated with the node. In case of failure, @secid will be | |
2289 | * set to zero. | |
2290 | */ | |
d6335d77 | 2291 | void security_inode_getsecid(struct inode *inode, u32 *secid) |
8a076191 | 2292 | { |
f25fce3e | 2293 | call_void_hook(inode_getsecid, inode, secid); |
8a076191 AD |
2294 | } |
2295 | ||
916e3258 PM |
2296 | /** |
2297 | * security_inode_copy_up() - Create new creds for an overlayfs copy-up op | |
2298 | * @src: union dentry of copy-up file | |
2299 | * @new: newly created creds | |
2300 | * | |
2301 | * A file is about to be copied up from lower layer to upper layer of overlay | |
2302 | * filesystem. Security module can prepare a set of new creds and modify as | |
2303 | * need be and return new creds. Caller will switch to new creds temporarily to | |
2304 | * create new file and release newly allocated creds. | |
2305 | * | |
2306 | * Return: Returns 0 on success or a negative error code on error. | |
2307 | */ | |
d8ad8b49 VG |
2308 | int security_inode_copy_up(struct dentry *src, struct cred **new) |
2309 | { | |
2310 | return call_int_hook(inode_copy_up, 0, src, new); | |
2311 | } | |
2312 | EXPORT_SYMBOL(security_inode_copy_up); | |
2313 | ||
916e3258 PM |
2314 | /** |
2315 | * security_inode_copy_up_xattr() - Filter xattrs in an overlayfs copy-up op | |
2316 | * @name: xattr name | |
2317 | * | |
2318 | * Filter the xattrs being copied up when a unioned file is copied up from a | |
2319 | * lower layer to the union/overlay layer. The caller is responsible for | |
2320 | * reading and writing the xattrs, this hook is merely a filter. | |
2321 | * | |
2322 | * Return: Returns 0 to accept the xattr, 1 to discard the xattr, -EOPNOTSUPP | |
2323 | * if the security module does not know about attribute, or a negative | |
2324 | * error code to abort the copy up. | |
2325 | */ | |
121ab822 VG |
2326 | int security_inode_copy_up_xattr(const char *name) |
2327 | { | |
23e390cd KS |
2328 | struct security_hook_list *hp; |
2329 | int rc; | |
2330 | ||
2331 | /* | |
2332 | * The implementation can return 0 (accept the xattr), 1 (discard the | |
2333 | * xattr), -EOPNOTSUPP if it does not know anything about the xattr or | |
2334 | * any other error code incase of an error. | |
2335 | */ | |
2336 | hlist_for_each_entry(hp, | |
2337 | &security_hook_heads.inode_copy_up_xattr, list) { | |
2338 | rc = hp->hook.inode_copy_up_xattr(name); | |
2339 | if (rc != LSM_RET_DEFAULT(inode_copy_up_xattr)) | |
2340 | return rc; | |
2341 | } | |
2342 | ||
2343 | return LSM_RET_DEFAULT(inode_copy_up_xattr); | |
121ab822 VG |
2344 | } |
2345 | EXPORT_SYMBOL(security_inode_copy_up_xattr); | |
2346 | ||
9348944b PM |
2347 | /** |
2348 | * security_kernfs_init_security() - Init LSM context for a kernfs node | |
2349 | * @kn_dir: parent kernfs node | |
2350 | * @kn: the kernfs node to initialize | |
2351 | * | |
2352 | * Initialize the security context of a newly created kernfs node based on its | |
2353 | * own and its parent's attributes. | |
2354 | * | |
2355 | * Return: Returns 0 if permission is granted. | |
2356 | */ | |
b230d5ab OM |
2357 | int security_kernfs_init_security(struct kernfs_node *kn_dir, |
2358 | struct kernfs_node *kn) | |
2359 | { | |
2360 | return call_int_hook(kernfs_init_security, 0, kn_dir, kn); | |
2361 | } | |
2362 | ||
a0fd6480 PM |
2363 | /** |
2364 | * security_file_permission() - Check file permissions | |
2365 | * @file: file | |
2366 | * @mask: requested permissions | |
2367 | * | |
2368 | * Check file permissions before accessing an open file. This hook is called | |
2369 | * by various operations that read or write files. A security module can use | |
2370 | * this hook to perform additional checking on these operations, e.g. to | |
2371 | * revalidate permissions on use to support privilege bracketing or policy | |
2372 | * changes. Notice that this hook is used when the actual read/write | |
2373 | * operations are performed, whereas the inode_security_ops hook is called when | |
2374 | * a file is opened (as well as many other operations). Although this hook can | |
2375 | * be used to revalidate permissions for various system call operations that | |
2376 | * read or write files, it does not address the revalidation of permissions for | |
2377 | * memory-mapped files. Security modules must handle this separately if they | |
2378 | * need such revalidation. | |
2379 | * | |
2380 | * Return: Returns 0 if permission is granted. | |
2381 | */ | |
20510f2f JM |
2382 | int security_file_permission(struct file *file, int mask) |
2383 | { | |
c4ec54b4 EP |
2384 | int ret; |
2385 | ||
f25fce3e | 2386 | ret = call_int_hook(file_permission, 0, file, mask); |
c4ec54b4 EP |
2387 | if (ret) |
2388 | return ret; | |
2389 | ||
2390 | return fsnotify_perm(file, mask); | |
20510f2f JM |
2391 | } |
2392 | ||
a0fd6480 PM |
2393 | /** |
2394 | * security_file_alloc() - Allocate and init a file's LSM blob | |
2395 | * @file: the file | |
2396 | * | |
2397 | * Allocate and attach a security structure to the file->f_security field. The | |
2398 | * security field is initialized to NULL when the structure is first created. | |
2399 | * | |
2400 | * Return: Return 0 if the hook is successful and permission is granted. | |
2401 | */ | |
20510f2f JM |
2402 | int security_file_alloc(struct file *file) |
2403 | { | |
33bf60ca CS |
2404 | int rc = lsm_file_alloc(file); |
2405 | ||
2406 | if (rc) | |
2407 | return rc; | |
2408 | rc = call_int_hook(file_alloc_security, 0, file); | |
2409 | if (unlikely(rc)) | |
2410 | security_file_free(file); | |
2411 | return rc; | |
20510f2f JM |
2412 | } |
2413 | ||
a0fd6480 PM |
2414 | /** |
2415 | * security_file_free() - Free a file's LSM blob | |
2416 | * @file: the file | |
2417 | * | |
2418 | * Deallocate and free any security structures stored in file->f_security. | |
2419 | */ | |
20510f2f JM |
2420 | void security_file_free(struct file *file) |
2421 | { | |
33bf60ca CS |
2422 | void *blob; |
2423 | ||
f25fce3e | 2424 | call_void_hook(file_free_security, file); |
33bf60ca CS |
2425 | |
2426 | blob = file->f_security; | |
2427 | if (blob) { | |
2428 | file->f_security = NULL; | |
2429 | kmem_cache_free(lsm_file_cache, blob); | |
2430 | } | |
20510f2f JM |
2431 | } |
2432 | ||
a0fd6480 PM |
2433 | /** |
2434 | * security_file_ioctl() - Check if an ioctl is allowed | |
2435 | * @file: associated file | |
2436 | * @cmd: ioctl cmd | |
2437 | * @arg: ioctl arguments | |
2438 | * | |
2439 | * Check permission for an ioctl operation on @file. Note that @arg sometimes | |
2440 | * represents a user space pointer; in other cases, it may be a simple integer | |
2441 | * value. When @arg represents a user space pointer, it should never be used | |
2442 | * by the security module. | |
2443 | * | |
2444 | * Return: Returns 0 if permission is granted. | |
2445 | */ | |
20510f2f JM |
2446 | int security_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
2447 | { | |
f25fce3e | 2448 | return call_int_hook(file_ioctl, 0, file, cmd, arg); |
20510f2f | 2449 | } |
292f902a | 2450 | EXPORT_SYMBOL_GPL(security_file_ioctl); |
20510f2f | 2451 | |
98de59bf | 2452 | static inline unsigned long mmap_prot(struct file *file, unsigned long prot) |
20510f2f | 2453 | { |
8b3ec681 | 2454 | /* |
98de59bf AV |
2455 | * Does we have PROT_READ and does the application expect |
2456 | * it to imply PROT_EXEC? If not, nothing to talk about... | |
8b3ec681 | 2457 | */ |
98de59bf AV |
2458 | if ((prot & (PROT_READ | PROT_EXEC)) != PROT_READ) |
2459 | return prot; | |
8b3ec681 | 2460 | if (!(current->personality & READ_IMPLIES_EXEC)) |
98de59bf AV |
2461 | return prot; |
2462 | /* | |
2463 | * if that's an anonymous mapping, let it. | |
2464 | */ | |
2465 | if (!file) | |
2466 | return prot | PROT_EXEC; | |
2467 | /* | |
2468 | * ditto if it's not on noexec mount, except that on !MMU we need | |
b4caecd4 | 2469 | * NOMMU_MAP_EXEC (== VM_MAYEXEC) in this case |
98de59bf | 2470 | */ |
90f8572b | 2471 | if (!path_noexec(&file->f_path)) { |
8b3ec681 | 2472 | #ifndef CONFIG_MMU |
b4caecd4 CH |
2473 | if (file->f_op->mmap_capabilities) { |
2474 | unsigned caps = file->f_op->mmap_capabilities(file); | |
2475 | if (!(caps & NOMMU_MAP_EXEC)) | |
2476 | return prot; | |
2477 | } | |
8b3ec681 | 2478 | #endif |
98de59bf | 2479 | return prot | PROT_EXEC; |
8b3ec681 | 2480 | } |
98de59bf AV |
2481 | /* anything on noexec mount won't get PROT_EXEC */ |
2482 | return prot; | |
2483 | } | |
2484 | ||
a0fd6480 PM |
2485 | /** |
2486 | * security_mmap_file() - Check if mmap'ing a file is allowed | |
2487 | * @file: file | |
2488 | * @prot: protection applied by the kernel | |
2489 | * @flags: flags | |
2490 | * | |
2491 | * Check permissions for a mmap operation. The @file may be NULL, e.g. if | |
2492 | * mapping anonymous memory. | |
2493 | * | |
2494 | * Return: Returns 0 if permission is granted. | |
2495 | */ | |
98de59bf AV |
2496 | int security_mmap_file(struct file *file, unsigned long prot, |
2497 | unsigned long flags) | |
2498 | { | |
4971c268 | 2499 | unsigned long prot_adj = mmap_prot(file, prot); |
98de59bf | 2500 | int ret; |
4971c268 RS |
2501 | |
2502 | ret = call_int_hook(mmap_file, 0, file, prot, prot_adj, flags); | |
6c21a7fb MZ |
2503 | if (ret) |
2504 | return ret; | |
4971c268 | 2505 | return ima_file_mmap(file, prot, prot_adj, flags); |
20510f2f JM |
2506 | } |
2507 | ||
a0fd6480 PM |
2508 | /** |
2509 | * security_mmap_addr() - Check if mmap'ing an address is allowed | |
2510 | * @addr: address | |
2511 | * | |
2512 | * Check permissions for a mmap operation at @addr. | |
2513 | * | |
2514 | * Return: Returns 0 if permission is granted. | |
2515 | */ | |
e5467859 AV |
2516 | int security_mmap_addr(unsigned long addr) |
2517 | { | |
f25fce3e | 2518 | return call_int_hook(mmap_addr, 0, addr); |
e5467859 AV |
2519 | } |
2520 | ||
a0fd6480 PM |
2521 | /** |
2522 | * security_file_mprotect() - Check if changing memory protections is allowed | |
2523 | * @vma: memory region | |
2524 | * @reqprot: application requested protection | |
2525 | * @prog: protection applied by the kernel | |
2526 | * | |
2527 | * Check permissions before changing memory access permissions. | |
2528 | * | |
2529 | * Return: Returns 0 if permission is granted. | |
2530 | */ | |
20510f2f JM |
2531 | int security_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot, |
2532 | unsigned long prot) | |
2533 | { | |
8eb613c0 MZ |
2534 | int ret; |
2535 | ||
2536 | ret = call_int_hook(file_mprotect, 0, vma, reqprot, prot); | |
2537 | if (ret) | |
2538 | return ret; | |
2539 | return ima_file_mprotect(vma, prot); | |
20510f2f JM |
2540 | } |
2541 | ||
a0fd6480 PM |
2542 | /** |
2543 | * security_file_lock() - Check if a file lock is allowed | |
2544 | * @file: file | |
2545 | * @cmd: lock operation (e.g. F_RDLCK, F_WRLCK) | |
2546 | * | |
2547 | * Check permission before performing file locking operations. Note the hook | |
2548 | * mediates both flock and fcntl style locks. | |
2549 | * | |
2550 | * Return: Returns 0 if permission is granted. | |
2551 | */ | |
20510f2f JM |
2552 | int security_file_lock(struct file *file, unsigned int cmd) |
2553 | { | |
f25fce3e | 2554 | return call_int_hook(file_lock, 0, file, cmd); |
20510f2f JM |
2555 | } |
2556 | ||
a0fd6480 PM |
2557 | /** |
2558 | * security_file_fcntl() - Check if fcntl() op is allowed | |
2559 | * @file: file | |
2560 | * @cmd: fnctl command | |
2561 | * @arg: command argument | |
2562 | * | |
2563 | * Check permission before allowing the file operation specified by @cmd from | |
2564 | * being performed on the file @file. Note that @arg sometimes represents a | |
2565 | * user space pointer; in other cases, it may be a simple integer value. When | |
2566 | * @arg represents a user space pointer, it should never be used by the | |
2567 | * security module. | |
2568 | * | |
2569 | * Return: Returns 0 if permission is granted. | |
2570 | */ | |
20510f2f JM |
2571 | int security_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg) |
2572 | { | |
f25fce3e | 2573 | return call_int_hook(file_fcntl, 0, file, cmd, arg); |
20510f2f JM |
2574 | } |
2575 | ||
a0fd6480 PM |
2576 | /** |
2577 | * security_file_set_fowner() - Set the file owner info in the LSM blob | |
2578 | * @file: the file | |
2579 | * | |
2580 | * Save owner security information (typically from current->security) in | |
2581 | * file->f_security for later use by the send_sigiotask hook. | |
2582 | * | |
2583 | * Return: Returns 0 on success. | |
2584 | */ | |
e0b93edd | 2585 | void security_file_set_fowner(struct file *file) |
20510f2f | 2586 | { |
f25fce3e | 2587 | call_void_hook(file_set_fowner, file); |
20510f2f JM |
2588 | } |
2589 | ||
a0fd6480 PM |
2590 | /** |
2591 | * security_file_send_sigiotask() - Check if sending SIGIO/SIGURG is allowed | |
2592 | * @tsk: target task | |
2593 | * @fown: signal sender | |
2594 | * @sig: signal to be sent, SIGIO is sent if 0 | |
2595 | * | |
2596 | * Check permission for the file owner @fown to send SIGIO or SIGURG to the | |
2597 | * process @tsk. Note that this hook is sometimes called from interrupt. Note | |
2598 | * that the fown_struct, @fown, is never outside the context of a struct file, | |
2599 | * so the file structure (and associated security information) can always be | |
2600 | * obtained: container_of(fown, struct file, f_owner). | |
2601 | * | |
2602 | * Return: Returns 0 if permission is granted. | |
2603 | */ | |
20510f2f JM |
2604 | int security_file_send_sigiotask(struct task_struct *tsk, |
2605 | struct fown_struct *fown, int sig) | |
2606 | { | |
f25fce3e | 2607 | return call_int_hook(file_send_sigiotask, 0, tsk, fown, sig); |
20510f2f JM |
2608 | } |
2609 | ||
a0fd6480 PM |
2610 | /** |
2611 | * security_file_receive() - Check is receiving a file via IPC is allowed | |
2612 | * @file: file being received | |
2613 | * | |
2614 | * This hook allows security modules to control the ability of a process to | |
2615 | * receive an open file descriptor via socket IPC. | |
2616 | * | |
2617 | * Return: Returns 0 if permission is granted. | |
2618 | */ | |
20510f2f JM |
2619 | int security_file_receive(struct file *file) |
2620 | { | |
f25fce3e | 2621 | return call_int_hook(file_receive, 0, file); |
20510f2f JM |
2622 | } |
2623 | ||
a0fd6480 PM |
2624 | /** |
2625 | * security_file_open() - Save open() time state for late use by the LSM | |
2626 | * @file: | |
2627 | * | |
2628 | * Save open-time permission checking state for later use upon file_permission, | |
2629 | * and recheck access if anything has changed since inode_permission. | |
2630 | * | |
2631 | * Return: Returns 0 if permission is granted. | |
2632 | */ | |
e3f20ae2 | 2633 | int security_file_open(struct file *file) |
20510f2f | 2634 | { |
c4ec54b4 EP |
2635 | int ret; |
2636 | ||
94817692 | 2637 | ret = call_int_hook(file_open, 0, file); |
c4ec54b4 EP |
2638 | if (ret) |
2639 | return ret; | |
2640 | ||
2641 | return fsnotify_perm(file, MAY_OPEN); | |
20510f2f JM |
2642 | } |
2643 | ||
a0fd6480 PM |
2644 | /** |
2645 | * security_file_truncate() - Check if truncating a file is allowed | |
2646 | * @file: file | |
2647 | * | |
2648 | * Check permission before truncating a file, i.e. using ftruncate. Note that | |
2649 | * truncation permission may also be checked based on the path, using the | |
2650 | * @path_truncate hook. | |
2651 | * | |
2652 | * Return: Returns 0 if permission is granted. | |
2653 | */ | |
3350607d GN |
2654 | int security_file_truncate(struct file *file) |
2655 | { | |
2656 | return call_int_hook(file_truncate, 0, file); | |
2657 | } | |
2658 | ||
130c53bf PM |
2659 | /** |
2660 | * security_task_alloc() - Allocate a task's LSM blob | |
2661 | * @task: the task | |
2662 | * @clone_flags: flags indicating what is being shared | |
2663 | * | |
2664 | * Handle allocation of task-related resources. | |
2665 | * | |
2666 | * Return: Returns a zero on success, negative values on failure. | |
2667 | */ | |
e4e55b47 TH |
2668 | int security_task_alloc(struct task_struct *task, unsigned long clone_flags) |
2669 | { | |
f4ad8f2c CS |
2670 | int rc = lsm_task_alloc(task); |
2671 | ||
2672 | if (rc) | |
2673 | return rc; | |
2674 | rc = call_int_hook(task_alloc, 0, task, clone_flags); | |
2675 | if (unlikely(rc)) | |
2676 | security_task_free(task); | |
2677 | return rc; | |
e4e55b47 TH |
2678 | } |
2679 | ||
130c53bf PM |
2680 | /** |
2681 | * security_task_free() - Free a task's LSM blob and related resources | |
2682 | * @task: task | |
2683 | * | |
2684 | * Handle release of task-related resources. Note that this can be called from | |
2685 | * interrupt context. | |
2686 | */ | |
1a2a4d06 KC |
2687 | void security_task_free(struct task_struct *task) |
2688 | { | |
f25fce3e | 2689 | call_void_hook(task_free, task); |
f4ad8f2c CS |
2690 | |
2691 | kfree(task->security); | |
2692 | task->security = NULL; | |
1a2a4d06 KC |
2693 | } |
2694 | ||
130c53bf PM |
2695 | /** |
2696 | * security_cred_alloc_blank() - Allocate the min memory to allow cred_transfer | |
2697 | * @cred: credentials | |
2698 | * @gfp: gfp flags | |
2699 | * | |
2700 | * Only allocate sufficient memory and attach to @cred such that | |
2701 | * cred_transfer() will not get ENOMEM. | |
2702 | * | |
2703 | * Return: Returns 0 on success, negative values on failure. | |
2704 | */ | |
ee18d64c DH |
2705 | int security_cred_alloc_blank(struct cred *cred, gfp_t gfp) |
2706 | { | |
bbd3662a CS |
2707 | int rc = lsm_cred_alloc(cred, gfp); |
2708 | ||
2709 | if (rc) | |
2710 | return rc; | |
2711 | ||
2712 | rc = call_int_hook(cred_alloc_blank, 0, cred, gfp); | |
33bf60ca | 2713 | if (unlikely(rc)) |
bbd3662a CS |
2714 | security_cred_free(cred); |
2715 | return rc; | |
ee18d64c DH |
2716 | } |
2717 | ||
130c53bf PM |
2718 | /** |
2719 | * security_cred_free() - Free the cred's LSM blob and associated resources | |
2720 | * @cred: credentials | |
2721 | * | |
2722 | * Deallocate and clear the cred->security field in a set of credentials. | |
2723 | */ | |
d84f4f99 | 2724 | void security_cred_free(struct cred *cred) |
20510f2f | 2725 | { |
a5795fd3 JM |
2726 | /* |
2727 | * There is a failure case in prepare_creds() that | |
2728 | * may result in a call here with ->security being NULL. | |
2729 | */ | |
2730 | if (unlikely(cred->security == NULL)) | |
2731 | return; | |
2732 | ||
f25fce3e | 2733 | call_void_hook(cred_free, cred); |
bbd3662a CS |
2734 | |
2735 | kfree(cred->security); | |
2736 | cred->security = NULL; | |
20510f2f JM |
2737 | } |
2738 | ||
130c53bf PM |
2739 | /** |
2740 | * security_prepare_creds() - Prepare a new set of credentials | |
2741 | * @new: new credentials | |
2742 | * @old: original credentials | |
2743 | * @gfp: gfp flags | |
2744 | * | |
2745 | * Prepare a new set of credentials by copying the data from the old set. | |
2746 | * | |
2747 | * Return: Returns 0 on success, negative values on failure. | |
2748 | */ | |
d84f4f99 | 2749 | int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp) |
20510f2f | 2750 | { |
bbd3662a CS |
2751 | int rc = lsm_cred_alloc(new, gfp); |
2752 | ||
2753 | if (rc) | |
2754 | return rc; | |
2755 | ||
2756 | rc = call_int_hook(cred_prepare, 0, new, old, gfp); | |
33bf60ca | 2757 | if (unlikely(rc)) |
bbd3662a CS |
2758 | security_cred_free(new); |
2759 | return rc; | |
d84f4f99 DH |
2760 | } |
2761 | ||
130c53bf PM |
2762 | /** |
2763 | * security_transfer_creds() - Transfer creds | |
2764 | * @new: target credentials | |
2765 | * @old: original credentials | |
2766 | * | |
2767 | * Transfer data from original creds to new creds. | |
2768 | */ | |
ee18d64c DH |
2769 | void security_transfer_creds(struct cred *new, const struct cred *old) |
2770 | { | |
f25fce3e | 2771 | call_void_hook(cred_transfer, new, old); |
ee18d64c DH |
2772 | } |
2773 | ||
130c53bf PM |
2774 | /** |
2775 | * security_cred_getsecid() - Get the secid from a set of credentials | |
2776 | * @c: credentials | |
2777 | * @secid: secid value | |
2778 | * | |
2779 | * Retrieve the security identifier of the cred structure @c. In case of | |
2780 | * failure, @secid will be set to zero. | |
2781 | */ | |
3ec30113 MG |
2782 | void security_cred_getsecid(const struct cred *c, u32 *secid) |
2783 | { | |
2784 | *secid = 0; | |
2785 | call_void_hook(cred_getsecid, c, secid); | |
2786 | } | |
2787 | EXPORT_SYMBOL(security_cred_getsecid); | |
2788 | ||
130c53bf PM |
2789 | /** |
2790 | * security_kernel_act_as() - Set the kernel credentials to act as secid | |
2791 | * @new: credentials | |
2792 | * @secid: secid | |
2793 | * | |
2794 | * Set the credentials for a kernel service to act as (subjective context). | |
2795 | * The current task must be the one that nominated @secid. | |
2796 | * | |
2797 | * Return: Returns 0 if successful. | |
2798 | */ | |
3a3b7ce9 DH |
2799 | int security_kernel_act_as(struct cred *new, u32 secid) |
2800 | { | |
f25fce3e | 2801 | return call_int_hook(kernel_act_as, 0, new, secid); |
3a3b7ce9 DH |
2802 | } |
2803 | ||
130c53bf PM |
2804 | /** |
2805 | * security_kernel_create_files_as() - Set file creation context using an inode | |
2806 | * @new: target credentials | |
2807 | * @inode: reference inode | |
2808 | * | |
2809 | * Set the file creation context in a set of credentials to be the same as the | |
2810 | * objective context of the specified inode. The current task must be the one | |
2811 | * that nominated @inode. | |
2812 | * | |
2813 | * Return: Returns 0 if successful. | |
2814 | */ | |
3a3b7ce9 DH |
2815 | int security_kernel_create_files_as(struct cred *new, struct inode *inode) |
2816 | { | |
f25fce3e | 2817 | return call_int_hook(kernel_create_files_as, 0, new, inode); |
3a3b7ce9 DH |
2818 | } |
2819 | ||
130c53bf PM |
2820 | /** |
2821 | * security_kernel_module_request() - Check is loading a module is allowed | |
2822 | * @kmod_name: module name | |
2823 | * | |
2824 | * Ability to trigger the kernel to automatically upcall to userspace for | |
2825 | * userspace to load a kernel module with the given name. | |
2826 | * | |
2827 | * Return: Returns 0 if successful. | |
2828 | */ | |
dd8dbf2e | 2829 | int security_kernel_module_request(char *kmod_name) |
9188499c | 2830 | { |
6eb864c1 MK |
2831 | int ret; |
2832 | ||
2833 | ret = call_int_hook(kernel_module_request, 0, kmod_name); | |
2834 | if (ret) | |
2835 | return ret; | |
2836 | return integrity_kernel_module_request(kmod_name); | |
9188499c EP |
2837 | } |
2838 | ||
130c53bf PM |
2839 | /** |
2840 | * security_kernel_read_file() - Read a file specified by userspace | |
2841 | * @file: file | |
2842 | * @id: file identifier | |
2843 | * @contents: trust if security_kernel_post_read_file() will be called | |
2844 | * | |
2845 | * Read a file specified by userspace. | |
2846 | * | |
2847 | * Return: Returns 0 if permission is granted. | |
2848 | */ | |
2039bda1 KC |
2849 | int security_kernel_read_file(struct file *file, enum kernel_read_file_id id, |
2850 | bool contents) | |
39eeb4fb MZ |
2851 | { |
2852 | int ret; | |
2853 | ||
2039bda1 | 2854 | ret = call_int_hook(kernel_read_file, 0, file, id, contents); |
39eeb4fb MZ |
2855 | if (ret) |
2856 | return ret; | |
2039bda1 | 2857 | return ima_read_file(file, id, contents); |
39eeb4fb MZ |
2858 | } |
2859 | EXPORT_SYMBOL_GPL(security_kernel_read_file); | |
2860 | ||
130c53bf PM |
2861 | /** |
2862 | * security_kernel_post_read_file() - Read a file specified by userspace | |
2863 | * @file: file | |
2864 | * @buf: file contents | |
2865 | * @size: size of file contents | |
2866 | * @id: file identifier | |
2867 | * | |
2868 | * Read a file specified by userspace. This must be paired with a prior call | |
2869 | * to security_kernel_read_file() call that indicated this hook would also be | |
2870 | * called, see security_kernel_read_file() for more information. | |
2871 | * | |
2872 | * Return: Returns 0 if permission is granted. | |
2873 | */ | |
bc8ca5b9 MZ |
2874 | int security_kernel_post_read_file(struct file *file, char *buf, loff_t size, |
2875 | enum kernel_read_file_id id) | |
b44a7dfc | 2876 | { |
cf222217 MZ |
2877 | int ret; |
2878 | ||
2879 | ret = call_int_hook(kernel_post_read_file, 0, file, buf, size, id); | |
2880 | if (ret) | |
2881 | return ret; | |
2882 | return ima_post_read_file(file, buf, size, id); | |
b44a7dfc MZ |
2883 | } |
2884 | EXPORT_SYMBOL_GPL(security_kernel_post_read_file); | |
2885 | ||
130c53bf PM |
2886 | /** |
2887 | * security_kernel_load_data() - Load data provided by userspace | |
2888 | * @id: data identifier | |
2889 | * @contents: true if security_kernel_post_load_data() will be called | |
2890 | * | |
2891 | * Load data provided by userspace. | |
2892 | * | |
2893 | * Return: Returns 0 if permission is granted. | |
2894 | */ | |
b64fcae7 | 2895 | int security_kernel_load_data(enum kernel_load_data_id id, bool contents) |
377179cd | 2896 | { |
16c267aa MZ |
2897 | int ret; |
2898 | ||
b64fcae7 | 2899 | ret = call_int_hook(kernel_load_data, 0, id, contents); |
16c267aa MZ |
2900 | if (ret) |
2901 | return ret; | |
b64fcae7 | 2902 | return ima_load_data(id, contents); |
377179cd | 2903 | } |
83a68a06 | 2904 | EXPORT_SYMBOL_GPL(security_kernel_load_data); |
377179cd | 2905 | |
130c53bf PM |
2906 | /** |
2907 | * security_kernel_post_load_data() - Load userspace data from a non-file source | |
2908 | * @buf: data | |
2909 | * @size: size of data | |
2910 | * @id: data identifier | |
2911 | * @description: text description of data, specific to the id value | |
2912 | * | |
2913 | * Load data provided by a non-file source (usually userspace buffer). This | |
2914 | * must be paired with a prior security_kernel_load_data() call that indicated | |
2915 | * this hook would also be called, see security_kernel_load_data() for more | |
2916 | * information. | |
2917 | * | |
2918 | * Return: Returns 0 if permission is granted. | |
2919 | */ | |
b64fcae7 KC |
2920 | int security_kernel_post_load_data(char *buf, loff_t size, |
2921 | enum kernel_load_data_id id, | |
2922 | char *description) | |
2923 | { | |
2924 | int ret; | |
2925 | ||
2926 | ret = call_int_hook(kernel_post_load_data, 0, buf, size, id, | |
2927 | description); | |
2928 | if (ret) | |
2929 | return ret; | |
2930 | return ima_post_load_data(buf, size, id, description); | |
2931 | } | |
2932 | EXPORT_SYMBOL_GPL(security_kernel_post_load_data); | |
2933 | ||
130c53bf PM |
2934 | /** |
2935 | * security_task_fix_setuid() - Update LSM with new user id attributes | |
2936 | * @new: updated credentials | |
2937 | * @old: credentials being replaced | |
2938 | * @flags: LSM_SETID_* flag values | |
2939 | * | |
2940 | * Update the module's state after setting one or more of the user identity | |
2941 | * attributes of the current process. The @flags parameter indicates which of | |
2942 | * the set*uid system calls invoked this hook. If @new is the set of | |
2943 | * credentials that will be installed. Modifications should be made to this | |
2944 | * rather than to @current->cred. | |
2945 | * | |
2946 | * Return: Returns 0 on success. | |
2947 | */ | |
d84f4f99 DH |
2948 | int security_task_fix_setuid(struct cred *new, const struct cred *old, |
2949 | int flags) | |
20510f2f | 2950 | { |
f25fce3e | 2951 | return call_int_hook(task_fix_setuid, 0, new, old, flags); |
20510f2f JM |
2952 | } |
2953 | ||
130c53bf PM |
2954 | /** |
2955 | * security_task_fix_setgid() - Update LSM with new group id attributes | |
2956 | * @new: updated credentials | |
2957 | * @old: credentials being replaced | |
2958 | * @flags: LSM_SETID_* flag value | |
2959 | * | |
2960 | * Update the module's state after setting one or more of the group identity | |
2961 | * attributes of the current process. The @flags parameter indicates which of | |
2962 | * the set*gid system calls invoked this hook. @new is the set of credentials | |
2963 | * that will be installed. Modifications should be made to this rather than to | |
2964 | * @current->cred. | |
2965 | * | |
2966 | * Return: Returns 0 on success. | |
2967 | */ | |
39030e13 TC |
2968 | int security_task_fix_setgid(struct cred *new, const struct cred *old, |
2969 | int flags) | |
2970 | { | |
2971 | return call_int_hook(task_fix_setgid, 0, new, old, flags); | |
2972 | } | |
2973 | ||
130c53bf PM |
2974 | /** |
2975 | * security_task_fix_setgroups() - Update LSM with new supplementary groups | |
2976 | * @new: updated credentials | |
2977 | * @old: credentials being replaced | |
2978 | * | |
2979 | * Update the module's state after setting the supplementary group identity | |
2980 | * attributes of the current process. @new is the set of credentials that will | |
2981 | * be installed. Modifications should be made to this rather than to | |
2982 | * @current->cred. | |
2983 | * | |
2984 | * Return: Returns 0 on success. | |
2985 | */ | |
fcfe0ac2 MM |
2986 | int security_task_fix_setgroups(struct cred *new, const struct cred *old) |
2987 | { | |
2988 | return call_int_hook(task_fix_setgroups, 0, new, old); | |
2989 | } | |
2990 | ||
130c53bf PM |
2991 | /** |
2992 | * security_task_setpgid() - Check if setting the pgid is allowed | |
2993 | * @p: task being modified | |
2994 | * @pgid: new pgid | |
2995 | * | |
2996 | * Check permission before setting the process group identifier of the process | |
2997 | * @p to @pgid. | |
2998 | * | |
2999 | * Return: Returns 0 if permission is granted. | |
3000 | */ | |
20510f2f JM |
3001 | int security_task_setpgid(struct task_struct *p, pid_t pgid) |
3002 | { | |
f25fce3e | 3003 | return call_int_hook(task_setpgid, 0, p, pgid); |
20510f2f JM |
3004 | } |
3005 | ||
130c53bf PM |
3006 | /** |
3007 | * security_task_getpgid() - Check if getting the pgid is allowed | |
3008 | * @p: task | |
3009 | * | |
3010 | * Check permission before getting the process group identifier of the process | |
3011 | * @p. | |
3012 | * | |
3013 | * Return: Returns 0 if permission is granted. | |
3014 | */ | |
20510f2f JM |
3015 | int security_task_getpgid(struct task_struct *p) |
3016 | { | |
f25fce3e | 3017 | return call_int_hook(task_getpgid, 0, p); |
20510f2f JM |
3018 | } |
3019 | ||
130c53bf PM |
3020 | /** |
3021 | * security_task_getsid() - Check if getting the session id is allowed | |
3022 | * @p: task | |
3023 | * | |
3024 | * Check permission before getting the session identifier of the process @p. | |
3025 | * | |
3026 | * Return: Returns 0 if permission is granted. | |
3027 | */ | |
20510f2f JM |
3028 | int security_task_getsid(struct task_struct *p) |
3029 | { | |
f25fce3e | 3030 | return call_int_hook(task_getsid, 0, p); |
20510f2f JM |
3031 | } |
3032 | ||
130c53bf PM |
3033 | /** |
3034 | * security_current_getsecid_subj() - Get the current task's subjective secid | |
3035 | * @secid: secid value | |
3036 | * | |
3037 | * Retrieve the subjective security identifier of the current task and return | |
3038 | * it in @secid. In case of failure, @secid will be set to zero. | |
3039 | */ | |
6326948f | 3040 | void security_current_getsecid_subj(u32 *secid) |
20510f2f | 3041 | { |
b1d9e6b0 | 3042 | *secid = 0; |
6326948f | 3043 | call_void_hook(current_getsecid_subj, secid); |
20510f2f | 3044 | } |
6326948f | 3045 | EXPORT_SYMBOL(security_current_getsecid_subj); |
4ebd7651 | 3046 | |
130c53bf PM |
3047 | /** |
3048 | * security_task_getsecid_obj() - Get a task's objective secid | |
3049 | * @p: target task | |
3050 | * @secid: secid value | |
3051 | * | |
3052 | * Retrieve the objective security identifier of the task_struct in @p and | |
3053 | * return it in @secid. In case of failure, @secid will be set to zero. | |
3054 | */ | |
4ebd7651 PM |
3055 | void security_task_getsecid_obj(struct task_struct *p, u32 *secid) |
3056 | { | |
3057 | *secid = 0; | |
3058 | call_void_hook(task_getsecid_obj, p, secid); | |
3059 | } | |
3060 | EXPORT_SYMBOL(security_task_getsecid_obj); | |
20510f2f | 3061 | |
130c53bf PM |
3062 | /** |
3063 | * security_task_setnice() - Check if setting a task's nice value is allowed | |
3064 | * @p: target task | |
3065 | * @nice: nice value | |
3066 | * | |
3067 | * Check permission before setting the nice value of @p to @nice. | |
3068 | * | |
3069 | * Return: Returns 0 if permission is granted. | |
3070 | */ | |
20510f2f JM |
3071 | int security_task_setnice(struct task_struct *p, int nice) |
3072 | { | |
f25fce3e | 3073 | return call_int_hook(task_setnice, 0, p, nice); |
20510f2f JM |
3074 | } |
3075 | ||
130c53bf PM |
3076 | /** |
3077 | * security_task_setioprio() - Check if setting a task's ioprio is allowed | |
3078 | * @p: target task | |
3079 | * @ioprio: ioprio value | |
3080 | * | |
3081 | * Check permission before setting the ioprio value of @p to @ioprio. | |
3082 | * | |
3083 | * Return: Returns 0 if permission is granted. | |
3084 | */ | |
20510f2f JM |
3085 | int security_task_setioprio(struct task_struct *p, int ioprio) |
3086 | { | |
f25fce3e | 3087 | return call_int_hook(task_setioprio, 0, p, ioprio); |
20510f2f JM |
3088 | } |
3089 | ||
130c53bf PM |
3090 | /** |
3091 | * security_task_getioprio() - Check if getting a task's ioprio is allowed | |
3092 | * @p: task | |
3093 | * | |
3094 | * Check permission before getting the ioprio value of @p. | |
3095 | * | |
3096 | * Return: Returns 0 if permission is granted. | |
3097 | */ | |
20510f2f JM |
3098 | int security_task_getioprio(struct task_struct *p) |
3099 | { | |
f25fce3e | 3100 | return call_int_hook(task_getioprio, 0, p); |
20510f2f JM |
3101 | } |
3102 | ||
130c53bf PM |
3103 | /** |
3104 | * security_task_prlimit() - Check if get/setting resources limits is allowed | |
3105 | * @cred: current task credentials | |
3106 | * @tcred: target task credentials | |
3107 | * @flags: LSM_PRLIMIT_* flag bits indicating a get/set/both | |
3108 | * | |
3109 | * Check permission before getting and/or setting the resource limits of | |
3110 | * another task. | |
3111 | * | |
3112 | * Return: Returns 0 if permission is granted. | |
3113 | */ | |
791ec491 SS |
3114 | int security_task_prlimit(const struct cred *cred, const struct cred *tcred, |
3115 | unsigned int flags) | |
3116 | { | |
3117 | return call_int_hook(task_prlimit, 0, cred, tcred, flags); | |
3118 | } | |
3119 | ||
130c53bf PM |
3120 | /** |
3121 | * security_task_setrlimit() - Check if setting a new rlimit value is allowed | |
3122 | * @p: target task's group leader | |
3123 | * @resource: resource whose limit is being set | |
3124 | * @new_rlim: new resource limit | |
3125 | * | |
3126 | * Check permission before setting the resource limits of process @p for | |
3127 | * @resource to @new_rlim. The old resource limit values can be examined by | |
3128 | * dereferencing (p->signal->rlim + resource). | |
3129 | * | |
3130 | * Return: Returns 0 if permission is granted. | |
3131 | */ | |
8fd00b4d JS |
3132 | int security_task_setrlimit(struct task_struct *p, unsigned int resource, |
3133 | struct rlimit *new_rlim) | |
20510f2f | 3134 | { |
f25fce3e | 3135 | return call_int_hook(task_setrlimit, 0, p, resource, new_rlim); |
20510f2f JM |
3136 | } |
3137 | ||
130c53bf PM |
3138 | /** |
3139 | * security_task_setscheduler() - Check if setting sched policy/param is allowed | |
3140 | * @p: target task | |
3141 | * | |
3142 | * Check permission before setting scheduling policy and/or parameters of | |
3143 | * process @p. | |
3144 | * | |
3145 | * Return: Returns 0 if permission is granted. | |
3146 | */ | |
b0ae1981 | 3147 | int security_task_setscheduler(struct task_struct *p) |
20510f2f | 3148 | { |
f25fce3e | 3149 | return call_int_hook(task_setscheduler, 0, p); |
20510f2f JM |
3150 | } |
3151 | ||
130c53bf PM |
3152 | /** |
3153 | * security_task_getscheduler() - Check if getting scheduling info is allowed | |
3154 | * @p: target task | |
3155 | * | |
3156 | * Check permission before obtaining scheduling information for process @p. | |
3157 | * | |
3158 | * Return: Returns 0 if permission is granted. | |
3159 | */ | |
20510f2f JM |
3160 | int security_task_getscheduler(struct task_struct *p) |
3161 | { | |
f25fce3e | 3162 | return call_int_hook(task_getscheduler, 0, p); |
20510f2f JM |
3163 | } |
3164 | ||
130c53bf PM |
3165 | /** |
3166 | * security_task_movememory() - Check if moving memory is allowed | |
3167 | * @p: task | |
3168 | * | |
3169 | * Check permission before moving memory owned by process @p. | |
3170 | * | |
3171 | * Return: Returns 0 if permission is granted. | |
3172 | */ | |
20510f2f JM |
3173 | int security_task_movememory(struct task_struct *p) |
3174 | { | |
f25fce3e | 3175 | return call_int_hook(task_movememory, 0, p); |
20510f2f JM |
3176 | } |
3177 | ||
130c53bf PM |
3178 | /** |
3179 | * security_task_kill() - Check if sending a signal is allowed | |
3180 | * @p: target process | |
3181 | * @info: signal information | |
3182 | * @sig: signal value | |
3183 | * @cred: credentials of the signal sender, NULL if @current | |
3184 | * | |
3185 | * Check permission before sending signal @sig to @p. @info can be NULL, the | |
3186 | * constant 1, or a pointer to a kernel_siginfo structure. If @info is 1 or | |
3187 | * SI_FROMKERNEL(info) is true, then the signal should be viewed as coming from | |
3188 | * the kernel and should typically be permitted. SIGIO signals are handled | |
3189 | * separately by the send_sigiotask hook in file_security_ops. | |
3190 | * | |
3191 | * Return: Returns 0 if permission is granted. | |
3192 | */ | |
ae7795bc | 3193 | int security_task_kill(struct task_struct *p, struct kernel_siginfo *info, |
6b4f3d01 | 3194 | int sig, const struct cred *cred) |
20510f2f | 3195 | { |
6b4f3d01 | 3196 | return call_int_hook(task_kill, 0, p, info, sig, cred); |
20510f2f JM |
3197 | } |
3198 | ||
130c53bf PM |
3199 | /** |
3200 | * security_task_prctl() - Check if a prctl op is allowed | |
3201 | * @option: operation | |
3202 | * @arg2: argument | |
3203 | * @arg3: argument | |
3204 | * @arg4: argument | |
3205 | * @arg5: argument | |
3206 | * | |
3207 | * Check permission before performing a process control operation on the | |
3208 | * current process. | |
3209 | * | |
3210 | * Return: Return -ENOSYS if no-one wanted to handle this op, any other value | |
3211 | * to cause prctl() to return immediately with that value. | |
3212 | */ | |
20510f2f | 3213 | int security_task_prctl(int option, unsigned long arg2, unsigned long arg3, |
d84f4f99 | 3214 | unsigned long arg4, unsigned long arg5) |
20510f2f | 3215 | { |
b1d9e6b0 | 3216 | int thisrc; |
98e828a0 | 3217 | int rc = LSM_RET_DEFAULT(task_prctl); |
b1d9e6b0 CS |
3218 | struct security_hook_list *hp; |
3219 | ||
df0ce173 | 3220 | hlist_for_each_entry(hp, &security_hook_heads.task_prctl, list) { |
b1d9e6b0 | 3221 | thisrc = hp->hook.task_prctl(option, arg2, arg3, arg4, arg5); |
98e828a0 | 3222 | if (thisrc != LSM_RET_DEFAULT(task_prctl)) { |
b1d9e6b0 CS |
3223 | rc = thisrc; |
3224 | if (thisrc != 0) | |
3225 | break; | |
3226 | } | |
3227 | } | |
3228 | return rc; | |
20510f2f JM |
3229 | } |
3230 | ||
130c53bf PM |
3231 | /** |
3232 | * security_task_to_inode() - Set the security attributes of a task's inode | |
3233 | * @p: task | |
3234 | * @inode: inode | |
3235 | * | |
3236 | * Set the security attributes for an inode based on an associated task's | |
3237 | * security attributes, e.g. for /proc/pid inodes. | |
3238 | */ | |
20510f2f JM |
3239 | void security_task_to_inode(struct task_struct *p, struct inode *inode) |
3240 | { | |
f25fce3e | 3241 | call_void_hook(task_to_inode, p, inode); |
20510f2f JM |
3242 | } |
3243 | ||
130c53bf PM |
3244 | /** |
3245 | * security_create_user_ns() - Check if creating a new userns is allowed | |
3246 | * @cred: prepared creds | |
3247 | * | |
3248 | * Check permission prior to creating a new user namespace. | |
3249 | * | |
3250 | * Return: Returns 0 if successful, otherwise < 0 error code. | |
3251 | */ | |
7cd4c5c2 FL |
3252 | int security_create_user_ns(const struct cred *cred) |
3253 | { | |
3254 | return call_int_hook(userns_create, 0, cred); | |
3255 | } | |
20510f2f JM |
3256 | |
3257 | int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag) | |
3258 | { | |
f25fce3e | 3259 | return call_int_hook(ipc_permission, 0, ipcp, flag); |
20510f2f JM |
3260 | } |
3261 | ||
8a076191 AD |
3262 | void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid) |
3263 | { | |
b1d9e6b0 | 3264 | *secid = 0; |
f25fce3e | 3265 | call_void_hook(ipc_getsecid, ipcp, secid); |
8a076191 AD |
3266 | } |
3267 | ||
20510f2f JM |
3268 | int security_msg_msg_alloc(struct msg_msg *msg) |
3269 | { | |
ecd5f82e CS |
3270 | int rc = lsm_msg_msg_alloc(msg); |
3271 | ||
3272 | if (unlikely(rc)) | |
3273 | return rc; | |
3274 | rc = call_int_hook(msg_msg_alloc_security, 0, msg); | |
3275 | if (unlikely(rc)) | |
3276 | security_msg_msg_free(msg); | |
3277 | return rc; | |
20510f2f JM |
3278 | } |
3279 | ||
3280 | void security_msg_msg_free(struct msg_msg *msg) | |
3281 | { | |
f25fce3e | 3282 | call_void_hook(msg_msg_free_security, msg); |
ecd5f82e CS |
3283 | kfree(msg->security); |
3284 | msg->security = NULL; | |
20510f2f JM |
3285 | } |
3286 | ||
d8c6e854 | 3287 | int security_msg_queue_alloc(struct kern_ipc_perm *msq) |
20510f2f | 3288 | { |
ecd5f82e CS |
3289 | int rc = lsm_ipc_alloc(msq); |
3290 | ||
3291 | if (unlikely(rc)) | |
3292 | return rc; | |
3293 | rc = call_int_hook(msg_queue_alloc_security, 0, msq); | |
3294 | if (unlikely(rc)) | |
3295 | security_msg_queue_free(msq); | |
3296 | return rc; | |
20510f2f JM |
3297 | } |
3298 | ||
d8c6e854 | 3299 | void security_msg_queue_free(struct kern_ipc_perm *msq) |
20510f2f | 3300 | { |
f25fce3e | 3301 | call_void_hook(msg_queue_free_security, msq); |
ecd5f82e CS |
3302 | kfree(msq->security); |
3303 | msq->security = NULL; | |
20510f2f JM |
3304 | } |
3305 | ||
d8c6e854 | 3306 | int security_msg_queue_associate(struct kern_ipc_perm *msq, int msqflg) |
20510f2f | 3307 | { |
f25fce3e | 3308 | return call_int_hook(msg_queue_associate, 0, msq, msqflg); |
20510f2f JM |
3309 | } |
3310 | ||
d8c6e854 | 3311 | int security_msg_queue_msgctl(struct kern_ipc_perm *msq, int cmd) |
20510f2f | 3312 | { |
f25fce3e | 3313 | return call_int_hook(msg_queue_msgctl, 0, msq, cmd); |
20510f2f JM |
3314 | } |
3315 | ||
d8c6e854 | 3316 | int security_msg_queue_msgsnd(struct kern_ipc_perm *msq, |
20510f2f JM |
3317 | struct msg_msg *msg, int msqflg) |
3318 | { | |
f25fce3e | 3319 | return call_int_hook(msg_queue_msgsnd, 0, msq, msg, msqflg); |
20510f2f JM |
3320 | } |
3321 | ||
d8c6e854 | 3322 | int security_msg_queue_msgrcv(struct kern_ipc_perm *msq, struct msg_msg *msg, |
20510f2f JM |
3323 | struct task_struct *target, long type, int mode) |
3324 | { | |
f25fce3e | 3325 | return call_int_hook(msg_queue_msgrcv, 0, msq, msg, target, type, mode); |
20510f2f JM |
3326 | } |
3327 | ||
7191adff | 3328 | int security_shm_alloc(struct kern_ipc_perm *shp) |
20510f2f | 3329 | { |
ecd5f82e CS |
3330 | int rc = lsm_ipc_alloc(shp); |
3331 | ||
3332 | if (unlikely(rc)) | |
3333 | return rc; | |
3334 | rc = call_int_hook(shm_alloc_security, 0, shp); | |
3335 | if (unlikely(rc)) | |
3336 | security_shm_free(shp); | |
3337 | return rc; | |
20510f2f JM |
3338 | } |
3339 | ||
7191adff | 3340 | void security_shm_free(struct kern_ipc_perm *shp) |
20510f2f | 3341 | { |
f25fce3e | 3342 | call_void_hook(shm_free_security, shp); |
ecd5f82e CS |
3343 | kfree(shp->security); |
3344 | shp->security = NULL; | |
20510f2f JM |
3345 | } |
3346 | ||
7191adff | 3347 | int security_shm_associate(struct kern_ipc_perm *shp, int shmflg) |
20510f2f | 3348 | { |
f25fce3e | 3349 | return call_int_hook(shm_associate, 0, shp, shmflg); |
20510f2f JM |
3350 | } |
3351 | ||
7191adff | 3352 | int security_shm_shmctl(struct kern_ipc_perm *shp, int cmd) |
20510f2f | 3353 | { |
f25fce3e | 3354 | return call_int_hook(shm_shmctl, 0, shp, cmd); |
20510f2f JM |
3355 | } |
3356 | ||
7191adff | 3357 | int security_shm_shmat(struct kern_ipc_perm *shp, char __user *shmaddr, int shmflg) |
20510f2f | 3358 | { |
f25fce3e | 3359 | return call_int_hook(shm_shmat, 0, shp, shmaddr, shmflg); |
20510f2f JM |
3360 | } |
3361 | ||
aefad959 | 3362 | int security_sem_alloc(struct kern_ipc_perm *sma) |
20510f2f | 3363 | { |
ecd5f82e CS |
3364 | int rc = lsm_ipc_alloc(sma); |
3365 | ||
3366 | if (unlikely(rc)) | |
3367 | return rc; | |
3368 | rc = call_int_hook(sem_alloc_security, 0, sma); | |
3369 | if (unlikely(rc)) | |
3370 | security_sem_free(sma); | |
3371 | return rc; | |
20510f2f JM |
3372 | } |
3373 | ||
aefad959 | 3374 | void security_sem_free(struct kern_ipc_perm *sma) |
20510f2f | 3375 | { |
f25fce3e | 3376 | call_void_hook(sem_free_security, sma); |
ecd5f82e CS |
3377 | kfree(sma->security); |
3378 | sma->security = NULL; | |
20510f2f JM |
3379 | } |
3380 | ||
aefad959 | 3381 | int security_sem_associate(struct kern_ipc_perm *sma, int semflg) |
20510f2f | 3382 | { |
f25fce3e | 3383 | return call_int_hook(sem_associate, 0, sma, semflg); |
20510f2f JM |
3384 | } |
3385 | ||
aefad959 | 3386 | int security_sem_semctl(struct kern_ipc_perm *sma, int cmd) |
20510f2f | 3387 | { |
f25fce3e | 3388 | return call_int_hook(sem_semctl, 0, sma, cmd); |
20510f2f JM |
3389 | } |
3390 | ||
aefad959 | 3391 | int security_sem_semop(struct kern_ipc_perm *sma, struct sembuf *sops, |
20510f2f JM |
3392 | unsigned nsops, int alter) |
3393 | { | |
f25fce3e | 3394 | return call_int_hook(sem_semop, 0, sma, sops, nsops, alter); |
20510f2f JM |
3395 | } |
3396 | ||
916e3258 PM |
3397 | /** |
3398 | * security_d_instantiate() - Populate an inode's LSM state based on a dentry | |
3399 | * @dentry: dentry | |
3400 | * @inode: inode | |
3401 | * | |
3402 | * Fill in @inode security information for a @dentry if allowed. | |
3403 | */ | |
20510f2f JM |
3404 | void security_d_instantiate(struct dentry *dentry, struct inode *inode) |
3405 | { | |
3406 | if (unlikely(inode && IS_PRIVATE(inode))) | |
3407 | return; | |
f25fce3e | 3408 | call_void_hook(d_instantiate, dentry, inode); |
20510f2f JM |
3409 | } |
3410 | EXPORT_SYMBOL(security_d_instantiate); | |
3411 | ||
916e3258 PM |
3412 | /** |
3413 | * security_getprocattr() - Read an attribute for a task | |
3414 | * @p: the task | |
3415 | * @lsm: LSM name | |
3416 | * @name: attribute name | |
3417 | * @value: attribute value | |
3418 | * | |
3419 | * Read attribute @name for task @p and store it into @value if allowed. | |
3420 | * | |
3421 | * Return: Returns the length of @value on success, a negative value otherwise. | |
3422 | */ | |
c8e477c6 AV |
3423 | int security_getprocattr(struct task_struct *p, const char *lsm, |
3424 | const char *name, char **value) | |
20510f2f | 3425 | { |
6d9c939d CS |
3426 | struct security_hook_list *hp; |
3427 | ||
3428 | hlist_for_each_entry(hp, &security_hook_heads.getprocattr, list) { | |
3429 | if (lsm != NULL && strcmp(lsm, hp->lsm)) | |
3430 | continue; | |
3431 | return hp->hook.getprocattr(p, name, value); | |
3432 | } | |
98e828a0 | 3433 | return LSM_RET_DEFAULT(getprocattr); |
20510f2f JM |
3434 | } |
3435 | ||
916e3258 PM |
3436 | /** |
3437 | * security_setprocattr() - Set an attribute for a task | |
3438 | * @lsm: LSM name | |
3439 | * @name: attribute name | |
3440 | * @value: attribute value | |
3441 | * @size: attribute value size | |
3442 | * | |
3443 | * Write (set) the current task's attribute @name to @value, size @size if | |
3444 | * allowed. | |
3445 | * | |
3446 | * Return: Returns bytes written on success, a negative value otherwise. | |
3447 | */ | |
6d9c939d CS |
3448 | int security_setprocattr(const char *lsm, const char *name, void *value, |
3449 | size_t size) | |
20510f2f | 3450 | { |
6d9c939d CS |
3451 | struct security_hook_list *hp; |
3452 | ||
3453 | hlist_for_each_entry(hp, &security_hook_heads.setprocattr, list) { | |
3454 | if (lsm != NULL && strcmp(lsm, hp->lsm)) | |
3455 | continue; | |
3456 | return hp->hook.setprocattr(name, value, size); | |
3457 | } | |
98e828a0 | 3458 | return LSM_RET_DEFAULT(setprocattr); |
20510f2f JM |
3459 | } |
3460 | ||
2bcf51bf PM |
3461 | /** |
3462 | * security_netlink_send() - Save info and check if netlink sending is allowed | |
3463 | * @sk: sending socket | |
3464 | * @skb: netlink message | |
3465 | * | |
3466 | * Save security information for a netlink message so that permission checking | |
3467 | * can be performed when the message is processed. The security information | |
3468 | * can be saved using the eff_cap field of the netlink_skb_parms structure. | |
3469 | * Also may be used to provide fine grained control over message transmission. | |
3470 | * | |
3471 | * Return: Returns 0 if the information was successfully saved and message is | |
3472 | * allowed to be transmitted. | |
3473 | */ | |
20510f2f JM |
3474 | int security_netlink_send(struct sock *sk, struct sk_buff *skb) |
3475 | { | |
f25fce3e | 3476 | return call_int_hook(netlink_send, 0, sk, skb); |
20510f2f | 3477 | } |
20510f2f | 3478 | |
746df9b5 DQ |
3479 | int security_ismaclabel(const char *name) |
3480 | { | |
f25fce3e | 3481 | return call_int_hook(ismaclabel, 0, name); |
746df9b5 DQ |
3482 | } |
3483 | EXPORT_SYMBOL(security_ismaclabel); | |
3484 | ||
20510f2f JM |
3485 | int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen) |
3486 | { | |
0550cfe8 KS |
3487 | struct security_hook_list *hp; |
3488 | int rc; | |
3489 | ||
3490 | /* | |
3491 | * Currently, only one LSM can implement secid_to_secctx (i.e this | |
3492 | * LSM hook is not "stackable"). | |
3493 | */ | |
3494 | hlist_for_each_entry(hp, &security_hook_heads.secid_to_secctx, list) { | |
3495 | rc = hp->hook.secid_to_secctx(secid, secdata, seclen); | |
3496 | if (rc != LSM_RET_DEFAULT(secid_to_secctx)) | |
3497 | return rc; | |
3498 | } | |
3499 | ||
3500 | return LSM_RET_DEFAULT(secid_to_secctx); | |
20510f2f JM |
3501 | } |
3502 | EXPORT_SYMBOL(security_secid_to_secctx); | |
3503 | ||
7bf570dc | 3504 | int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid) |
63cb3449 | 3505 | { |
b1d9e6b0 | 3506 | *secid = 0; |
f25fce3e | 3507 | return call_int_hook(secctx_to_secid, 0, secdata, seclen, secid); |
63cb3449 DH |
3508 | } |
3509 | EXPORT_SYMBOL(security_secctx_to_secid); | |
3510 | ||
20510f2f JM |
3511 | void security_release_secctx(char *secdata, u32 seclen) |
3512 | { | |
f25fce3e | 3513 | call_void_hook(release_secctx, secdata, seclen); |
20510f2f JM |
3514 | } |
3515 | EXPORT_SYMBOL(security_release_secctx); | |
3516 | ||
6f3be9f5 AG |
3517 | void security_inode_invalidate_secctx(struct inode *inode) |
3518 | { | |
3519 | call_void_hook(inode_invalidate_secctx, inode); | |
3520 | } | |
3521 | EXPORT_SYMBOL(security_inode_invalidate_secctx); | |
3522 | ||
1ee65e37 DQ |
3523 | int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen) |
3524 | { | |
f25fce3e | 3525 | return call_int_hook(inode_notifysecctx, 0, inode, ctx, ctxlen); |
1ee65e37 DQ |
3526 | } |
3527 | EXPORT_SYMBOL(security_inode_notifysecctx); | |
3528 | ||
3529 | int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen) | |
3530 | { | |
f25fce3e | 3531 | return call_int_hook(inode_setsecctx, 0, dentry, ctx, ctxlen); |
1ee65e37 DQ |
3532 | } |
3533 | EXPORT_SYMBOL(security_inode_setsecctx); | |
3534 | ||
3535 | int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen) | |
3536 | { | |
b1d9e6b0 | 3537 | return call_int_hook(inode_getsecctx, -EOPNOTSUPP, inode, ctx, ctxlen); |
1ee65e37 DQ |
3538 | } |
3539 | EXPORT_SYMBOL(security_inode_getsecctx); | |
3540 | ||
344fa64e DH |
3541 | #ifdef CONFIG_WATCH_QUEUE |
3542 | int security_post_notification(const struct cred *w_cred, | |
3543 | const struct cred *cred, | |
3544 | struct watch_notification *n) | |
3545 | { | |
3546 | return call_int_hook(post_notification, 0, w_cred, cred, n); | |
3547 | } | |
3548 | #endif /* CONFIG_WATCH_QUEUE */ | |
3549 | ||
998f5040 DH |
3550 | #ifdef CONFIG_KEY_NOTIFICATIONS |
3551 | int security_watch_key(struct key *key) | |
3552 | { | |
3553 | return call_int_hook(watch_key, 0, key); | |
3554 | } | |
3555 | #endif | |
3556 | ||
20510f2f | 3557 | #ifdef CONFIG_SECURITY_NETWORK |
2c2442fd PM |
3558 | /** |
3559 | * security_unix_stream_connect() - Check if a AF_UNIX stream is allowed | |
3560 | * @sock: originating sock | |
3561 | * @other: peer sock | |
3562 | * @newsk: new sock | |
3563 | * | |
3564 | * Check permissions before establishing a Unix domain stream connection | |
3565 | * between @sock and @other. | |
3566 | * | |
3567 | * The @unix_stream_connect and @unix_may_send hooks were necessary because | |
3568 | * Linux provides an alternative to the conventional file name space for Unix | |
3569 | * domain sockets. Whereas binding and connecting to sockets in the file name | |
3570 | * space is mediated by the typical file permissions (and caught by the mknod | |
3571 | * and permission hooks in inode_security_ops), binding and connecting to | |
3572 | * sockets in the abstract name space is completely unmediated. Sufficient | |
3573 | * control of Unix domain sockets in the abstract name space isn't possible | |
3574 | * using only the socket layer hooks, since we need to know the actual target | |
3575 | * socket, which is not looked up until we are inside the af_unix code. | |
3576 | * | |
3577 | * Return: Returns 0 if permission is granted. | |
3578 | */ | |
3610cda5 | 3579 | int security_unix_stream_connect(struct sock *sock, struct sock *other, struct sock *newsk) |
20510f2f | 3580 | { |
f25fce3e | 3581 | return call_int_hook(unix_stream_connect, 0, sock, other, newsk); |
20510f2f JM |
3582 | } |
3583 | EXPORT_SYMBOL(security_unix_stream_connect); | |
3584 | ||
2c2442fd PM |
3585 | /** |
3586 | * security_unix_may_send() - Check if AF_UNIX socket can send datagrams | |
3587 | * @sock: originating sock | |
3588 | * @other: peer sock | |
3589 | * | |
3590 | * Check permissions before connecting or sending datagrams from @sock to | |
3591 | * @other. | |
3592 | * | |
3593 | * The @unix_stream_connect and @unix_may_send hooks were necessary because | |
3594 | * Linux provides an alternative to the conventional file name space for Unix | |
3595 | * domain sockets. Whereas binding and connecting to sockets in the file name | |
3596 | * space is mediated by the typical file permissions (and caught by the mknod | |
3597 | * and permission hooks in inode_security_ops), binding and connecting to | |
3598 | * sockets in the abstract name space is completely unmediated. Sufficient | |
3599 | * control of Unix domain sockets in the abstract name space isn't possible | |
3600 | * using only the socket layer hooks, since we need to know the actual target | |
3601 | * socket, which is not looked up until we are inside the af_unix code. | |
3602 | * | |
3603 | * Return: Returns 0 if permission is granted. | |
3604 | */ | |
20510f2f JM |
3605 | int security_unix_may_send(struct socket *sock, struct socket *other) |
3606 | { | |
f25fce3e | 3607 | return call_int_hook(unix_may_send, 0, sock, other); |
20510f2f JM |
3608 | } |
3609 | EXPORT_SYMBOL(security_unix_may_send); | |
3610 | ||
6b6bbe8c PM |
3611 | /** |
3612 | * security_socket_create() - Check if creating a new socket is allowed | |
3613 | * @family: protocol family | |
3614 | * @type: communications type | |
3615 | * @protocol: requested protocol | |
3616 | * @kern: set to 1 if a kernel socket is requested | |
3617 | * | |
3618 | * Check permissions prior to creating a new socket. | |
3619 | * | |
3620 | * Return: Returns 0 if permission is granted. | |
3621 | */ | |
20510f2f JM |
3622 | int security_socket_create(int family, int type, int protocol, int kern) |
3623 | { | |
f25fce3e | 3624 | return call_int_hook(socket_create, 0, family, type, protocol, kern); |
20510f2f JM |
3625 | } |
3626 | ||
6b6bbe8c PM |
3627 | /** |
3628 | * security_socket_create() - Initialize a newly created socket | |
3629 | * @sock: socket | |
3630 | * @family: protocol family | |
3631 | * @type: communications type | |
3632 | * @protocol: requested protocol | |
3633 | * @kern: set to 1 if a kernel socket is requested | |
3634 | * | |
3635 | * This hook allows a module to update or allocate a per-socket security | |
3636 | * structure. Note that the security field was not added directly to the socket | |
3637 | * structure, but rather, the socket security information is stored in the | |
3638 | * associated inode. Typically, the inode alloc_security hook will allocate | |
3639 | * and attach security information to SOCK_INODE(sock)->i_security. This hook | |
3640 | * may be used to update the SOCK_INODE(sock)->i_security field with additional | |
3641 | * information that wasn't available when the inode was allocated. | |
3642 | * | |
3643 | * Return: Returns 0 if permission is granted. | |
3644 | */ | |
20510f2f JM |
3645 | int security_socket_post_create(struct socket *sock, int family, |
3646 | int type, int protocol, int kern) | |
3647 | { | |
f25fce3e | 3648 | return call_int_hook(socket_post_create, 0, sock, family, type, |
20510f2f JM |
3649 | protocol, kern); |
3650 | } | |
3651 | ||
6b6bbe8c PM |
3652 | /** |
3653 | * security_socket_socketpair() - Check if creating a socketpair is allowed | |
3654 | * @socka: first socket | |
3655 | * @sockb: second socket | |
3656 | * | |
3657 | * Check permissions before creating a fresh pair of sockets. | |
3658 | * | |
3659 | * Return: Returns 0 if permission is granted and the connection was | |
3660 | * established. | |
3661 | */ | |
aae7cfcb DH |
3662 | int security_socket_socketpair(struct socket *socka, struct socket *sockb) |
3663 | { | |
3664 | return call_int_hook(socket_socketpair, 0, socka, sockb); | |
3665 | } | |
3666 | EXPORT_SYMBOL(security_socket_socketpair); | |
3667 | ||
6b6bbe8c PM |
3668 | /** |
3669 | * security_socket_bind() - Check if a socket bind operation is allowed | |
3670 | * @sock: socket | |
3671 | * @address: requested bind address | |
3672 | * @addrlen: length of address | |
3673 | * | |
3674 | * Check permission before socket protocol layer bind operation is performed | |
3675 | * and the socket @sock is bound to the address specified in the @address | |
3676 | * parameter. | |
3677 | * | |
3678 | * Return: Returns 0 if permission is granted. | |
3679 | */ | |
20510f2f JM |
3680 | int security_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen) |
3681 | { | |
f25fce3e | 3682 | return call_int_hook(socket_bind, 0, sock, address, addrlen); |
20510f2f JM |
3683 | } |
3684 | ||
6b6bbe8c PM |
3685 | /** |
3686 | * security_socket_connect() - Check if a socket connect operation is allowed | |
3687 | * @sock: socket | |
3688 | * @address: address of remote connection point | |
3689 | * @addrlen: length of address | |
3690 | * | |
3691 | * Check permission before socket protocol layer connect operation attempts to | |
3692 | * connect socket @sock to a remote address, @address. | |
3693 | * | |
3694 | * Return: Returns 0 if permission is granted. | |
3695 | */ | |
20510f2f JM |
3696 | int security_socket_connect(struct socket *sock, struct sockaddr *address, int addrlen) |
3697 | { | |
f25fce3e | 3698 | return call_int_hook(socket_connect, 0, sock, address, addrlen); |
20510f2f JM |
3699 | } |
3700 | ||
6b6bbe8c PM |
3701 | /** |
3702 | * security_socket_listen() - Check if a socket is allowed to listen | |
3703 | * @sock: socket | |
3704 | * @backlog: connection queue size | |
3705 | * | |
3706 | * Check permission before socket protocol layer listen operation. | |
3707 | * | |
3708 | * Return: Returns 0 if permission is granted. | |
3709 | */ | |
20510f2f JM |
3710 | int security_socket_listen(struct socket *sock, int backlog) |
3711 | { | |
f25fce3e | 3712 | return call_int_hook(socket_listen, 0, sock, backlog); |
20510f2f JM |
3713 | } |
3714 | ||
6b6bbe8c PM |
3715 | /** |
3716 | * security_socket_accept() - Check if a socket is allowed to accept connections | |
3717 | * @sock: listening socket | |
3718 | * @newsock: newly creation connection socket | |
3719 | * | |
3720 | * Check permission before accepting a new connection. Note that the new | |
3721 | * socket, @newsock, has been created and some information copied to it, but | |
3722 | * the accept operation has not actually been performed. | |
3723 | * | |
3724 | * Return: Returns 0 if permission is granted. | |
3725 | */ | |
20510f2f JM |
3726 | int security_socket_accept(struct socket *sock, struct socket *newsock) |
3727 | { | |
f25fce3e | 3728 | return call_int_hook(socket_accept, 0, sock, newsock); |
20510f2f JM |
3729 | } |
3730 | ||
6b6bbe8c PM |
3731 | /** |
3732 | * security_socket_sendmsg() - Check is sending a message is allowed | |
3733 | * @sock: sending socket | |
3734 | * @msg: message to send | |
3735 | * @size: size of message | |
3736 | * | |
3737 | * Check permission before transmitting a message to another socket. | |
3738 | * | |
3739 | * Return: Returns 0 if permission is granted. | |
3740 | */ | |
20510f2f JM |
3741 | int security_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size) |
3742 | { | |
f25fce3e | 3743 | return call_int_hook(socket_sendmsg, 0, sock, msg, size); |
20510f2f JM |
3744 | } |
3745 | ||
6b6bbe8c PM |
3746 | /** |
3747 | * security_socket_recvmsg() - Check if receiving a message is allowed | |
3748 | * @sock: receiving socket | |
3749 | * @msg: message to receive | |
3750 | * @size: size of message | |
3751 | * @flags: operational flags | |
3752 | * | |
3753 | * Check permission before receiving a message from a socket. | |
3754 | * | |
3755 | * Return: Returns 0 if permission is granted. | |
3756 | */ | |
20510f2f JM |
3757 | int security_socket_recvmsg(struct socket *sock, struct msghdr *msg, |
3758 | int size, int flags) | |
3759 | { | |
f25fce3e | 3760 | return call_int_hook(socket_recvmsg, 0, sock, msg, size, flags); |
20510f2f JM |
3761 | } |
3762 | ||
6b6bbe8c PM |
3763 | /** |
3764 | * security_socket_getsockname() - Check if reading the socket addr is allowed | |
3765 | * @sock: socket | |
3766 | * | |
3767 | * Check permission before reading the local address (name) of the socket | |
3768 | * object. | |
3769 | * | |
3770 | * Return: Returns 0 if permission is granted. | |
3771 | */ | |
20510f2f JM |
3772 | int security_socket_getsockname(struct socket *sock) |
3773 | { | |
f25fce3e | 3774 | return call_int_hook(socket_getsockname, 0, sock); |
20510f2f JM |
3775 | } |
3776 | ||
6b6bbe8c PM |
3777 | /** |
3778 | * security_socket_getpeername() - Check if reading the peer's addr is allowed | |
3779 | * @sock: socket | |
3780 | * | |
3781 | * Check permission before the remote address (name) of a socket object. | |
3782 | * | |
3783 | * Return: Returns 0 if permission is granted. | |
3784 | */ | |
20510f2f JM |
3785 | int security_socket_getpeername(struct socket *sock) |
3786 | { | |
f25fce3e | 3787 | return call_int_hook(socket_getpeername, 0, sock); |
20510f2f JM |
3788 | } |
3789 | ||
6b6bbe8c PM |
3790 | /** |
3791 | * security_socket_getsockopt() - Check if reading a socket option is allowed | |
3792 | * @sock: socket | |
3793 | * @level: option's protocol level | |
3794 | * @optname: option name | |
3795 | * | |
3796 | * Check permissions before retrieving the options associated with socket | |
3797 | * @sock. | |
3798 | * | |
3799 | * Return: Returns 0 if permission is granted. | |
3800 | */ | |
20510f2f JM |
3801 | int security_socket_getsockopt(struct socket *sock, int level, int optname) |
3802 | { | |
f25fce3e | 3803 | return call_int_hook(socket_getsockopt, 0, sock, level, optname); |
20510f2f JM |
3804 | } |
3805 | ||
6b6bbe8c PM |
3806 | /** |
3807 | * security_socket_setsockopt() - Check if setting a socket option is allowed | |
3808 | * @sock: socket | |
3809 | * @level: option's protocol level | |
3810 | * @optname: option name | |
3811 | * | |
3812 | * Check permissions before setting the options associated with socket @sock. | |
3813 | * | |
3814 | * Return: Returns 0 if permission is granted. | |
3815 | */ | |
20510f2f JM |
3816 | int security_socket_setsockopt(struct socket *sock, int level, int optname) |
3817 | { | |
f25fce3e | 3818 | return call_int_hook(socket_setsockopt, 0, sock, level, optname); |
20510f2f JM |
3819 | } |
3820 | ||
6b6bbe8c PM |
3821 | /** |
3822 | * security_socket_shutdown() - Checks if shutting down the socket is allowed | |
3823 | * @sock: socket | |
3824 | * @how: flag indicating how sends and receives are handled | |
3825 | * | |
3826 | * Checks permission before all or part of a connection on the socket @sock is | |
3827 | * shut down. | |
3828 | * | |
3829 | * Return: Returns 0 if permission is granted. | |
3830 | */ | |
20510f2f JM |
3831 | int security_socket_shutdown(struct socket *sock, int how) |
3832 | { | |
f25fce3e | 3833 | return call_int_hook(socket_shutdown, 0, sock, how); |
20510f2f JM |
3834 | } |
3835 | ||
6b6bbe8c PM |
3836 | /** |
3837 | * security_sock_rcv_skb() - Check if an incoming network packet is allowed | |
3838 | * @sk: destination sock | |
3839 | * @skb: incoming packet | |
3840 | * | |
3841 | * Check permissions on incoming network packets. This hook is distinct from | |
3842 | * Netfilter's IP input hooks since it is the first time that the incoming | |
3843 | * sk_buff @skb has been associated with a particular socket, @sk. Must not | |
3844 | * sleep inside this hook because some callers hold spinlocks. | |
3845 | * | |
3846 | * Return: Returns 0 if permission is granted. | |
3847 | */ | |
20510f2f JM |
3848 | int security_sock_rcv_skb(struct sock *sk, struct sk_buff *skb) |
3849 | { | |
f25fce3e | 3850 | return call_int_hook(socket_sock_rcv_skb, 0, sk, skb); |
20510f2f JM |
3851 | } |
3852 | EXPORT_SYMBOL(security_sock_rcv_skb); | |
3853 | ||
6b6bbe8c PM |
3854 | /** |
3855 | * security_socket_getpeersec_stream() - Get the remote peer label | |
3856 | * @sock: socket | |
3857 | * @optval: destination buffer | |
3858 | * @optlen: size of peer label copied into the buffer | |
3859 | * @len: maximum size of the destination buffer | |
3860 | * | |
3861 | * This hook allows the security module to provide peer socket security state | |
3862 | * for unix or connected tcp sockets to userspace via getsockopt SO_GETPEERSEC. | |
3863 | * For tcp sockets this can be meaningful if the socket is associated with an | |
3864 | * ipsec SA. | |
3865 | * | |
3866 | * Return: Returns 0 if all is well, otherwise, typical getsockopt return | |
3867 | * values. | |
3868 | */ | |
b10b9c34 PM |
3869 | int security_socket_getpeersec_stream(struct socket *sock, sockptr_t optval, |
3870 | sockptr_t optlen, unsigned int len) | |
20510f2f | 3871 | { |
b1d9e6b0 | 3872 | return call_int_hook(socket_getpeersec_stream, -ENOPROTOOPT, sock, |
b10b9c34 | 3873 | optval, optlen, len); |
20510f2f JM |
3874 | } |
3875 | ||
6b6bbe8c PM |
3876 | /** |
3877 | * security_socket_getpeersec_dgram() - Get the remote peer label | |
3878 | * @sock: socket | |
3879 | * @skb: datagram packet | |
3880 | * @secid: remote peer label secid | |
3881 | * | |
3882 | * This hook allows the security module to provide peer socket security state | |
3883 | * for udp sockets on a per-packet basis to userspace via getsockopt | |
3884 | * SO_GETPEERSEC. The application must first have indicated the IP_PASSSEC | |
3885 | * option via getsockopt. It can then retrieve the security state returned by | |
3886 | * this hook for a packet via the SCM_SECURITY ancillary message type. | |
3887 | * | |
3888 | * Return: Returns 0 on success, error on failure. | |
3889 | */ | |
20510f2f JM |
3890 | int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid) |
3891 | { | |
e308fd3b JB |
3892 | return call_int_hook(socket_getpeersec_dgram, -ENOPROTOOPT, sock, |
3893 | skb, secid); | |
20510f2f JM |
3894 | } |
3895 | EXPORT_SYMBOL(security_socket_getpeersec_dgram); | |
3896 | ||
6b6bbe8c PM |
3897 | /** |
3898 | * security_sk_alloc() - Allocate and initialize a sock's LSM blob | |
3899 | * @sk: sock | |
3900 | * @family: protocol family | |
3901 | * @priotity: gfp flags | |
3902 | * | |
3903 | * Allocate and attach a security structure to the sk->sk_security field, which | |
3904 | * is used to copy security attributes between local stream sockets. | |
3905 | * | |
3906 | * Return: Returns 0 on success, error on failure. | |
3907 | */ | |
20510f2f JM |
3908 | int security_sk_alloc(struct sock *sk, int family, gfp_t priority) |
3909 | { | |
f25fce3e | 3910 | return call_int_hook(sk_alloc_security, 0, sk, family, priority); |
20510f2f JM |
3911 | } |
3912 | ||
6b6bbe8c PM |
3913 | /** |
3914 | * security_sk_free() - Free the sock's LSM blob | |
3915 | * @sk: sock | |
3916 | * | |
3917 | * Deallocate security structure. | |
3918 | */ | |
20510f2f JM |
3919 | void security_sk_free(struct sock *sk) |
3920 | { | |
f25fce3e | 3921 | call_void_hook(sk_free_security, sk); |
20510f2f JM |
3922 | } |
3923 | ||
6b6bbe8c PM |
3924 | /** |
3925 | * security_sk_clone() - Clone a sock's LSM state | |
3926 | * @sk: original sock | |
3927 | * @newsk: target sock | |
3928 | * | |
3929 | * Clone/copy security structure. | |
3930 | */ | |
20510f2f JM |
3931 | void security_sk_clone(const struct sock *sk, struct sock *newsk) |
3932 | { | |
f25fce3e | 3933 | call_void_hook(sk_clone_security, sk, newsk); |
20510f2f | 3934 | } |
6230c9b4 | 3935 | EXPORT_SYMBOL(security_sk_clone); |
20510f2f | 3936 | |
3df98d79 | 3937 | void security_sk_classify_flow(struct sock *sk, struct flowi_common *flic) |
20510f2f | 3938 | { |
3df98d79 | 3939 | call_void_hook(sk_getsecid, sk, &flic->flowic_secid); |
20510f2f JM |
3940 | } |
3941 | EXPORT_SYMBOL(security_sk_classify_flow); | |
3942 | ||
6b6bbe8c PM |
3943 | /** |
3944 | * security_req_classify_flow() - Set a flow's secid based on request_sock | |
3945 | * @req: request_sock | |
3946 | * @flic: target flow | |
3947 | * | |
3948 | * Sets @flic's secid to @req's secid. | |
3949 | */ | |
3df98d79 PM |
3950 | void security_req_classify_flow(const struct request_sock *req, |
3951 | struct flowi_common *flic) | |
20510f2f | 3952 | { |
3df98d79 | 3953 | call_void_hook(req_classify_flow, req, flic); |
20510f2f JM |
3954 | } |
3955 | EXPORT_SYMBOL(security_req_classify_flow); | |
3956 | ||
6b6bbe8c PM |
3957 | /** |
3958 | * security_sock_graft() - Reconcile LSM state when grafting a sock on a socket | |
3959 | * @sk: sock being grafted | |
3960 | * @sock: target socket | |
3961 | * | |
3962 | * Sets @sock's inode secid to @sk's secid and update @sk with any necessary | |
3963 | * LSM state from @sock. | |
3964 | */ | |
20510f2f JM |
3965 | void security_sock_graft(struct sock *sk, struct socket *parent) |
3966 | { | |
f25fce3e | 3967 | call_void_hook(sock_graft, sk, parent); |
20510f2f JM |
3968 | } |
3969 | EXPORT_SYMBOL(security_sock_graft); | |
3970 | ||
6b6bbe8c PM |
3971 | /** |
3972 | * security_inet_conn_request() - Set request_sock state using incoming connect | |
3973 | * @sk: parent listening sock | |
3974 | * @skb: incoming connection | |
3975 | * @req: new request_sock | |
3976 | * | |
3977 | * Initialize the @req LSM state based on @sk and the incoming connect in @skb. | |
3978 | * | |
3979 | * Return: Returns 0 if permission is granted. | |
3980 | */ | |
41dd9596 | 3981 | int security_inet_conn_request(const struct sock *sk, |
20510f2f JM |
3982 | struct sk_buff *skb, struct request_sock *req) |
3983 | { | |
f25fce3e | 3984 | return call_int_hook(inet_conn_request, 0, sk, skb, req); |
20510f2f JM |
3985 | } |
3986 | EXPORT_SYMBOL(security_inet_conn_request); | |
3987 | ||
6b6bbe8c PM |
3988 | /** |
3989 | * security_inet_csk_clone() - Set new sock LSM state based on request_sock | |
3990 | * @newsk: new sock | |
3991 | * @req: connection request_sock | |
3992 | * | |
3993 | * Set that LSM state of @sock using the LSM state from @req. | |
3994 | */ | |
20510f2f JM |
3995 | void security_inet_csk_clone(struct sock *newsk, |
3996 | const struct request_sock *req) | |
3997 | { | |
f25fce3e | 3998 | call_void_hook(inet_csk_clone, newsk, req); |
20510f2f JM |
3999 | } |
4000 | ||
6b6bbe8c PM |
4001 | /** |
4002 | * security_inet_conn_established() - Update sock's LSM state with connection | |
4003 | * @sk: sock | |
4004 | * @skb: connection packet | |
4005 | * | |
4006 | * Update @sock's LSM state to represent a new connection from @skb. | |
4007 | */ | |
20510f2f JM |
4008 | void security_inet_conn_established(struct sock *sk, |
4009 | struct sk_buff *skb) | |
4010 | { | |
f25fce3e | 4011 | call_void_hook(inet_conn_established, sk, skb); |
20510f2f | 4012 | } |
72e89f50 | 4013 | EXPORT_SYMBOL(security_inet_conn_established); |
20510f2f | 4014 | |
6b6bbe8c PM |
4015 | /** |
4016 | * security_secmark_relabel_packet() - Check if setting a secmark is allowed | |
4017 | * @secid: new secmark value | |
4018 | * | |
4019 | * Check if the process should be allowed to relabel packets to @secid. | |
4020 | * | |
4021 | * Return: Returns 0 if permission is granted. | |
4022 | */ | |
2606fd1f EP |
4023 | int security_secmark_relabel_packet(u32 secid) |
4024 | { | |
f25fce3e | 4025 | return call_int_hook(secmark_relabel_packet, 0, secid); |
2606fd1f EP |
4026 | } |
4027 | EXPORT_SYMBOL(security_secmark_relabel_packet); | |
4028 | ||
6b6bbe8c PM |
4029 | /** |
4030 | * security_secmark_refcount_inc() - Increment the secmark labeling rule count | |
4031 | * | |
4032 | * Tells the LSM to increment the number of secmark labeling rules loaded. | |
4033 | */ | |
2606fd1f EP |
4034 | void security_secmark_refcount_inc(void) |
4035 | { | |
f25fce3e | 4036 | call_void_hook(secmark_refcount_inc); |
2606fd1f EP |
4037 | } |
4038 | EXPORT_SYMBOL(security_secmark_refcount_inc); | |
4039 | ||
6b6bbe8c PM |
4040 | /** |
4041 | * security_secmark_refcount_dec() - Decrement the secmark labeling rule count | |
4042 | * | |
4043 | * Tells the LSM to decrement the number of secmark labeling rules loaded. | |
4044 | */ | |
2606fd1f EP |
4045 | void security_secmark_refcount_dec(void) |
4046 | { | |
f25fce3e | 4047 | call_void_hook(secmark_refcount_dec); |
2606fd1f EP |
4048 | } |
4049 | EXPORT_SYMBOL(security_secmark_refcount_dec); | |
4050 | ||
6b6bbe8c PM |
4051 | /** |
4052 | * security_tun_dev_alloc_security() - Allocate a LSM blob for a TUN device | |
4053 | * @security: pointer to the LSM blob | |
4054 | * | |
4055 | * This hook allows a module to allocate a security structure for a TUN device, | |
4056 | * returning the pointer in @security. | |
4057 | * | |
4058 | * Return: Returns a zero on success, negative values on failure. | |
4059 | */ | |
5dbbaf2d PM |
4060 | int security_tun_dev_alloc_security(void **security) |
4061 | { | |
f25fce3e | 4062 | return call_int_hook(tun_dev_alloc_security, 0, security); |
5dbbaf2d PM |
4063 | } |
4064 | EXPORT_SYMBOL(security_tun_dev_alloc_security); | |
4065 | ||
6b6bbe8c PM |
4066 | /** |
4067 | * security_tun_dev_free_security() - Free a TUN device LSM blob | |
4068 | * @security: LSM blob | |
4069 | * | |
4070 | * This hook allows a module to free the security structure for a TUN device. | |
4071 | */ | |
5dbbaf2d PM |
4072 | void security_tun_dev_free_security(void *security) |
4073 | { | |
f25fce3e | 4074 | call_void_hook(tun_dev_free_security, security); |
5dbbaf2d PM |
4075 | } |
4076 | EXPORT_SYMBOL(security_tun_dev_free_security); | |
4077 | ||
6b6bbe8c PM |
4078 | /** |
4079 | * security_tun_dev_create() - Check if creating a TUN device is allowed | |
4080 | * | |
4081 | * Check permissions prior to creating a new TUN device. | |
4082 | * | |
4083 | * Return: Returns 0 if permission is granted. | |
4084 | */ | |
2b980dbd PM |
4085 | int security_tun_dev_create(void) |
4086 | { | |
f25fce3e | 4087 | return call_int_hook(tun_dev_create, 0); |
2b980dbd PM |
4088 | } |
4089 | EXPORT_SYMBOL(security_tun_dev_create); | |
4090 | ||
6b6bbe8c PM |
4091 | /** |
4092 | * security_tun_dev_attach_queue() - Check if attaching a TUN queue is allowed | |
4093 | * @security: TUN device LSM blob | |
4094 | * | |
4095 | * Check permissions prior to attaching to a TUN device queue. | |
4096 | * | |
4097 | * Return: Returns 0 if permission is granted. | |
4098 | */ | |
5dbbaf2d | 4099 | int security_tun_dev_attach_queue(void *security) |
2b980dbd | 4100 | { |
f25fce3e | 4101 | return call_int_hook(tun_dev_attach_queue, 0, security); |
2b980dbd | 4102 | } |
5dbbaf2d | 4103 | EXPORT_SYMBOL(security_tun_dev_attach_queue); |
2b980dbd | 4104 | |
6b6bbe8c PM |
4105 | /** |
4106 | * security_tun_dev_attach() - Update TUN device LSM state on attach | |
4107 | * @sk: associated sock | |
4108 | * @security: TUN device LSM blob | |
4109 | * | |
4110 | * This hook can be used by the module to update any security state associated | |
4111 | * with the TUN device's sock structure. | |
4112 | * | |
4113 | * Return: Returns 0 if permission is granted. | |
4114 | */ | |
5dbbaf2d | 4115 | int security_tun_dev_attach(struct sock *sk, void *security) |
2b980dbd | 4116 | { |
f25fce3e | 4117 | return call_int_hook(tun_dev_attach, 0, sk, security); |
2b980dbd PM |
4118 | } |
4119 | EXPORT_SYMBOL(security_tun_dev_attach); | |
4120 | ||
6b6bbe8c PM |
4121 | /** |
4122 | * security_tun_dev_open() - Update TUN device LSM state on open | |
4123 | * @security: TUN device LSM blob | |
4124 | * | |
4125 | * This hook can be used by the module to update any security state associated | |
4126 | * with the TUN device's security structure. | |
4127 | * | |
4128 | * Return: Returns 0 if permission is granted. | |
4129 | */ | |
5dbbaf2d PM |
4130 | int security_tun_dev_open(void *security) |
4131 | { | |
f25fce3e | 4132 | return call_int_hook(tun_dev_open, 0, security); |
5dbbaf2d PM |
4133 | } |
4134 | EXPORT_SYMBOL(security_tun_dev_open); | |
4135 | ||
4a49f592 PM |
4136 | /** |
4137 | * security_sctp_assoc_request() - Update the LSM on a SCTP association req | |
4138 | * @asoc: SCTP association | |
4139 | * @skb: packet requesting the association | |
4140 | * | |
4141 | * Passes the @asoc and @chunk->skb of the association INIT packet to the LSM. | |
4142 | * | |
4143 | * Return: Returns 0 on success, error on failure. | |
4144 | */ | |
c081d53f | 4145 | int security_sctp_assoc_request(struct sctp_association *asoc, struct sk_buff *skb) |
72e89f50 | 4146 | { |
c081d53f | 4147 | return call_int_hook(sctp_assoc_request, 0, asoc, skb); |
72e89f50 RH |
4148 | } |
4149 | EXPORT_SYMBOL(security_sctp_assoc_request); | |
4150 | ||
4a49f592 PM |
4151 | /** |
4152 | * security_sctp_bind_connect() - Validate a list of addrs for a SCTP option | |
4153 | * @sk: socket | |
4154 | * @optname: SCTP option to validate | |
4155 | * @address: list of IP addresses to validate | |
4156 | * @addrlen: length of the address list | |
4157 | * | |
4158 | * Validiate permissions required for each address associated with sock @sk. | |
4159 | * Depending on @optname, the addresses will be treated as either a connect or | |
4160 | * bind service. The @addrlen is calculated on each IPv4 and IPv6 address using | |
4161 | * sizeof(struct sockaddr_in) or sizeof(struct sockaddr_in6). | |
4162 | * | |
4163 | * Return: Returns 0 on success, error on failure. | |
4164 | */ | |
72e89f50 RH |
4165 | int security_sctp_bind_connect(struct sock *sk, int optname, |
4166 | struct sockaddr *address, int addrlen) | |
4167 | { | |
4168 | return call_int_hook(sctp_bind_connect, 0, sk, optname, | |
4169 | address, addrlen); | |
4170 | } | |
4171 | EXPORT_SYMBOL(security_sctp_bind_connect); | |
4172 | ||
4a49f592 PM |
4173 | /** |
4174 | * security_sctp_sk_clone() - Clone a SCTP sock's LSM state | |
4175 | * @asoc: SCTP association | |
4176 | * @sk: original sock | |
4177 | * @newsk: target sock | |
4178 | * | |
4179 | * Called whenever a new socket is created by accept(2) (i.e. a TCP style | |
4180 | * socket) or when a socket is 'peeled off' e.g userspace calls | |
4181 | * sctp_peeloff(3). | |
4182 | */ | |
c081d53f | 4183 | void security_sctp_sk_clone(struct sctp_association *asoc, struct sock *sk, |
72e89f50 RH |
4184 | struct sock *newsk) |
4185 | { | |
c081d53f | 4186 | call_void_hook(sctp_sk_clone, asoc, sk, newsk); |
72e89f50 RH |
4187 | } |
4188 | EXPORT_SYMBOL(security_sctp_sk_clone); | |
4189 | ||
4a49f592 PM |
4190 | /** |
4191 | * security_sctp_assoc_established() - Update LSM state when assoc established | |
4192 | * @asoc: SCTP association | |
4193 | * @skb: packet establishing the association | |
4194 | * | |
4195 | * Passes the @asoc and @chunk->skb of the association COOKIE_ACK packet to the | |
4196 | * security module. | |
4197 | * | |
4198 | * Return: Returns 0 if permission is granted. | |
4199 | */ | |
5e50f5d4 OM |
4200 | int security_sctp_assoc_established(struct sctp_association *asoc, |
4201 | struct sk_buff *skb) | |
4202 | { | |
4203 | return call_int_hook(sctp_assoc_established, 0, asoc, skb); | |
4204 | } | |
4205 | EXPORT_SYMBOL(security_sctp_assoc_established); | |
4206 | ||
20510f2f JM |
4207 | #endif /* CONFIG_SECURITY_NETWORK */ |
4208 | ||
d291f1a6 DJ |
4209 | #ifdef CONFIG_SECURITY_INFINIBAND |
4210 | ||
4211 | int security_ib_pkey_access(void *sec, u64 subnet_prefix, u16 pkey) | |
4212 | { | |
4213 | return call_int_hook(ib_pkey_access, 0, sec, subnet_prefix, pkey); | |
4214 | } | |
4215 | EXPORT_SYMBOL(security_ib_pkey_access); | |
4216 | ||
47a2b338 DJ |
4217 | int security_ib_endport_manage_subnet(void *sec, const char *dev_name, u8 port_num) |
4218 | { | |
4219 | return call_int_hook(ib_endport_manage_subnet, 0, sec, dev_name, port_num); | |
4220 | } | |
4221 | EXPORT_SYMBOL(security_ib_endport_manage_subnet); | |
4222 | ||
d291f1a6 DJ |
4223 | int security_ib_alloc_security(void **sec) |
4224 | { | |
4225 | return call_int_hook(ib_alloc_security, 0, sec); | |
4226 | } | |
4227 | EXPORT_SYMBOL(security_ib_alloc_security); | |
4228 | ||
4229 | void security_ib_free_security(void *sec) | |
4230 | { | |
4231 | call_void_hook(ib_free_security, sec); | |
4232 | } | |
4233 | EXPORT_SYMBOL(security_ib_free_security); | |
4234 | #endif /* CONFIG_SECURITY_INFINIBAND */ | |
4235 | ||
20510f2f JM |
4236 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
4237 | ||
52a4c640 NA |
4238 | int security_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp, |
4239 | struct xfrm_user_sec_ctx *sec_ctx, | |
4240 | gfp_t gfp) | |
20510f2f | 4241 | { |
f25fce3e | 4242 | return call_int_hook(xfrm_policy_alloc_security, 0, ctxp, sec_ctx, gfp); |
20510f2f JM |
4243 | } |
4244 | EXPORT_SYMBOL(security_xfrm_policy_alloc); | |
4245 | ||
03e1ad7b PM |
4246 | int security_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx, |
4247 | struct xfrm_sec_ctx **new_ctxp) | |
20510f2f | 4248 | { |
f25fce3e | 4249 | return call_int_hook(xfrm_policy_clone_security, 0, old_ctx, new_ctxp); |
20510f2f JM |
4250 | } |
4251 | ||
03e1ad7b | 4252 | void security_xfrm_policy_free(struct xfrm_sec_ctx *ctx) |
20510f2f | 4253 | { |
f25fce3e | 4254 | call_void_hook(xfrm_policy_free_security, ctx); |
20510f2f JM |
4255 | } |
4256 | EXPORT_SYMBOL(security_xfrm_policy_free); | |
4257 | ||
03e1ad7b | 4258 | int security_xfrm_policy_delete(struct xfrm_sec_ctx *ctx) |
20510f2f | 4259 | { |
f25fce3e | 4260 | return call_int_hook(xfrm_policy_delete_security, 0, ctx); |
20510f2f JM |
4261 | } |
4262 | ||
2e5aa866 PM |
4263 | int security_xfrm_state_alloc(struct xfrm_state *x, |
4264 | struct xfrm_user_sec_ctx *sec_ctx) | |
20510f2f | 4265 | { |
f25fce3e | 4266 | return call_int_hook(xfrm_state_alloc, 0, x, sec_ctx); |
20510f2f JM |
4267 | } |
4268 | EXPORT_SYMBOL(security_xfrm_state_alloc); | |
4269 | ||
4270 | int security_xfrm_state_alloc_acquire(struct xfrm_state *x, | |
4271 | struct xfrm_sec_ctx *polsec, u32 secid) | |
4272 | { | |
f25fce3e | 4273 | return call_int_hook(xfrm_state_alloc_acquire, 0, x, polsec, secid); |
20510f2f JM |
4274 | } |
4275 | ||
4276 | int security_xfrm_state_delete(struct xfrm_state *x) | |
4277 | { | |
f25fce3e | 4278 | return call_int_hook(xfrm_state_delete_security, 0, x); |
20510f2f JM |
4279 | } |
4280 | EXPORT_SYMBOL(security_xfrm_state_delete); | |
4281 | ||
4282 | void security_xfrm_state_free(struct xfrm_state *x) | |
4283 | { | |
f25fce3e | 4284 | call_void_hook(xfrm_state_free_security, x); |
20510f2f JM |
4285 | } |
4286 | ||
8a922805 | 4287 | int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid) |
20510f2f | 4288 | { |
8a922805 | 4289 | return call_int_hook(xfrm_policy_lookup, 0, ctx, fl_secid); |
20510f2f JM |
4290 | } |
4291 | ||
4292 | int security_xfrm_state_pol_flow_match(struct xfrm_state *x, | |
e33f7704 | 4293 | struct xfrm_policy *xp, |
3df98d79 | 4294 | const struct flowi_common *flic) |
20510f2f | 4295 | { |
b1d9e6b0 | 4296 | struct security_hook_list *hp; |
98e828a0 | 4297 | int rc = LSM_RET_DEFAULT(xfrm_state_pol_flow_match); |
b1d9e6b0 CS |
4298 | |
4299 | /* | |
4300 | * Since this function is expected to return 0 or 1, the judgment | |
4301 | * becomes difficult if multiple LSMs supply this call. Fortunately, | |
4302 | * we can use the first LSM's judgment because currently only SELinux | |
4303 | * supplies this call. | |
4304 | * | |
4305 | * For speed optimization, we explicitly break the loop rather than | |
4306 | * using the macro | |
4307 | */ | |
df0ce173 | 4308 | hlist_for_each_entry(hp, &security_hook_heads.xfrm_state_pol_flow_match, |
b1d9e6b0 | 4309 | list) { |
3df98d79 | 4310 | rc = hp->hook.xfrm_state_pol_flow_match(x, xp, flic); |
b1d9e6b0 CS |
4311 | break; |
4312 | } | |
4313 | return rc; | |
20510f2f JM |
4314 | } |
4315 | ||
4316 | int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid) | |
4317 | { | |
f25fce3e | 4318 | return call_int_hook(xfrm_decode_session, 0, skb, secid, 1); |
20510f2f JM |
4319 | } |
4320 | ||
3df98d79 | 4321 | void security_skb_classify_flow(struct sk_buff *skb, struct flowi_common *flic) |
20510f2f | 4322 | { |
3df98d79 | 4323 | int rc = call_int_hook(xfrm_decode_session, 0, skb, &flic->flowic_secid, |
f25fce3e | 4324 | 0); |
20510f2f JM |
4325 | |
4326 | BUG_ON(rc); | |
4327 | } | |
4328 | EXPORT_SYMBOL(security_skb_classify_flow); | |
4329 | ||
4330 | #endif /* CONFIG_SECURITY_NETWORK_XFRM */ | |
4331 | ||
4332 | #ifdef CONFIG_KEYS | |
4333 | ||
d84f4f99 DH |
4334 | int security_key_alloc(struct key *key, const struct cred *cred, |
4335 | unsigned long flags) | |
20510f2f | 4336 | { |
f25fce3e | 4337 | return call_int_hook(key_alloc, 0, key, cred, flags); |
20510f2f JM |
4338 | } |
4339 | ||
4340 | void security_key_free(struct key *key) | |
4341 | { | |
f25fce3e | 4342 | call_void_hook(key_free, key); |
20510f2f JM |
4343 | } |
4344 | ||
8c0637e9 DH |
4345 | int security_key_permission(key_ref_t key_ref, const struct cred *cred, |
4346 | enum key_need_perm need_perm) | |
20510f2f | 4347 | { |
8c0637e9 | 4348 | return call_int_hook(key_permission, 0, key_ref, cred, need_perm); |
20510f2f JM |
4349 | } |
4350 | ||
70a5bb72 DH |
4351 | int security_key_getsecurity(struct key *key, char **_buffer) |
4352 | { | |
b1d9e6b0 | 4353 | *_buffer = NULL; |
f25fce3e | 4354 | return call_int_hook(key_getsecurity, 0, key, _buffer); |
70a5bb72 DH |
4355 | } |
4356 | ||
20510f2f | 4357 | #endif /* CONFIG_KEYS */ |
03d37d25 AD |
4358 | |
4359 | #ifdef CONFIG_AUDIT | |
4360 | ||
4361 | int security_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule) | |
4362 | { | |
f25fce3e | 4363 | return call_int_hook(audit_rule_init, 0, field, op, rulestr, lsmrule); |
03d37d25 AD |
4364 | } |
4365 | ||
4366 | int security_audit_rule_known(struct audit_krule *krule) | |
4367 | { | |
f25fce3e | 4368 | return call_int_hook(audit_rule_known, 0, krule); |
03d37d25 AD |
4369 | } |
4370 | ||
4371 | void security_audit_rule_free(void *lsmrule) | |
4372 | { | |
f25fce3e | 4373 | call_void_hook(audit_rule_free, lsmrule); |
03d37d25 AD |
4374 | } |
4375 | ||
90462a5b | 4376 | int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule) |
03d37d25 | 4377 | { |
90462a5b | 4378 | return call_int_hook(audit_rule_match, 0, secid, field, op, lsmrule); |
03d37d25 | 4379 | } |
b1d9e6b0 | 4380 | #endif /* CONFIG_AUDIT */ |
afdb09c7 CF |
4381 | |
4382 | #ifdef CONFIG_BPF_SYSCALL | |
4383 | int security_bpf(int cmd, union bpf_attr *attr, unsigned int size) | |
4384 | { | |
4385 | return call_int_hook(bpf, 0, cmd, attr, size); | |
4386 | } | |
4387 | int security_bpf_map(struct bpf_map *map, fmode_t fmode) | |
4388 | { | |
4389 | return call_int_hook(bpf_map, 0, map, fmode); | |
4390 | } | |
4391 | int security_bpf_prog(struct bpf_prog *prog) | |
4392 | { | |
4393 | return call_int_hook(bpf_prog, 0, prog); | |
4394 | } | |
4395 | int security_bpf_map_alloc(struct bpf_map *map) | |
4396 | { | |
4397 | return call_int_hook(bpf_map_alloc_security, 0, map); | |
4398 | } | |
4399 | int security_bpf_prog_alloc(struct bpf_prog_aux *aux) | |
4400 | { | |
4401 | return call_int_hook(bpf_prog_alloc_security, 0, aux); | |
4402 | } | |
4403 | void security_bpf_map_free(struct bpf_map *map) | |
4404 | { | |
4405 | call_void_hook(bpf_map_free_security, map); | |
4406 | } | |
4407 | void security_bpf_prog_free(struct bpf_prog_aux *aux) | |
4408 | { | |
4409 | call_void_hook(bpf_prog_free_security, aux); | |
4410 | } | |
4411 | #endif /* CONFIG_BPF_SYSCALL */ | |
9e47d31d MG |
4412 | |
4413 | int security_locked_down(enum lockdown_reason what) | |
4414 | { | |
4415 | return call_int_hook(locked_down, 0, what); | |
4416 | } | |
4417 | EXPORT_SYMBOL(security_locked_down); | |
da97e184 JFG |
4418 | |
4419 | #ifdef CONFIG_PERF_EVENTS | |
4420 | int security_perf_event_open(struct perf_event_attr *attr, int type) | |
4421 | { | |
4422 | return call_int_hook(perf_event_open, 0, attr, type); | |
4423 | } | |
4424 | ||
4425 | int security_perf_event_alloc(struct perf_event *event) | |
4426 | { | |
4427 | return call_int_hook(perf_event_alloc, 0, event); | |
4428 | } | |
4429 | ||
4430 | void security_perf_event_free(struct perf_event *event) | |
4431 | { | |
4432 | call_void_hook(perf_event_free, event); | |
4433 | } | |
4434 | ||
4435 | int security_perf_event_read(struct perf_event *event) | |
4436 | { | |
4437 | return call_int_hook(perf_event_read, 0, event); | |
4438 | } | |
4439 | ||
4440 | int security_perf_event_write(struct perf_event *event) | |
4441 | { | |
4442 | return call_int_hook(perf_event_write, 0, event); | |
4443 | } | |
4444 | #endif /* CONFIG_PERF_EVENTS */ | |
cdc1404a PM |
4445 | |
4446 | #ifdef CONFIG_IO_URING | |
4447 | int security_uring_override_creds(const struct cred *new) | |
4448 | { | |
4449 | return call_int_hook(uring_override_creds, 0, new); | |
4450 | } | |
4451 | ||
4452 | int security_uring_sqpoll(void) | |
4453 | { | |
4454 | return call_int_hook(uring_sqpoll, 0); | |
4455 | } | |
2a584012 LC |
4456 | int security_uring_cmd(struct io_uring_cmd *ioucmd) |
4457 | { | |
4458 | return call_int_hook(uring_cmd, 0, ioucmd); | |
4459 | } | |
cdc1404a | 4460 | #endif /* CONFIG_IO_URING */ |