Commit | Line | Data |
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b886d83c | 1 | // SPDX-License-Identifier: GPL-2.0-only |
b5e95b48 JJ |
2 | /* |
3 | * AppArmor security module | |
4 | * | |
5 | * This file contains AppArmor LSM hooks. | |
6 | * | |
7 | * Copyright (C) 1998-2008 Novell/SUSE | |
8 | * Copyright 2009-2010 Canonical Ltd. | |
b5e95b48 JJ |
9 | */ |
10 | ||
3c4ed7bd | 11 | #include <linux/lsm_hooks.h> |
b5e95b48 JJ |
12 | #include <linux/moduleparam.h> |
13 | #include <linux/mm.h> | |
14 | #include <linux/mman.h> | |
15 | #include <linux/mount.h> | |
16 | #include <linux/namei.h> | |
17 | #include <linux/ptrace.h> | |
18 | #include <linux/ctype.h> | |
19 | #include <linux/sysctl.h> | |
20 | #include <linux/audit.h> | |
3486740a | 21 | #include <linux/user_namespace.h> |
ab9f2115 MG |
22 | #include <linux/netfilter_ipv4.h> |
23 | #include <linux/netfilter_ipv6.h> | |
f4d6b94b | 24 | #include <linux/zstd.h> |
b5e95b48 | 25 | #include <net/sock.h> |
e262e32d | 26 | #include <uapi/linux/mount.h> |
b5e95b48 JJ |
27 | |
28 | #include "include/apparmor.h" | |
29 | #include "include/apparmorfs.h" | |
30 | #include "include/audit.h" | |
31 | #include "include/capability.h" | |
d8889d49 | 32 | #include "include/cred.h" |
b5e95b48 JJ |
33 | #include "include/file.h" |
34 | #include "include/ipc.h" | |
56974a6f | 35 | #include "include/net.h" |
b5e95b48 | 36 | #include "include/path.h" |
637f688d | 37 | #include "include/label.h" |
b5e95b48 | 38 | #include "include/policy.h" |
cff281f6 | 39 | #include "include/policy_ns.h" |
b5e95b48 | 40 | #include "include/procattr.h" |
2ea3ffb7 | 41 | #include "include/mount.h" |
c0929212 | 42 | #include "include/secid.h" |
b5e95b48 JJ |
43 | |
44 | /* Flag indicating whether initialization completed */ | |
545de8fe | 45 | int apparmor_initialized; |
b5e95b48 | 46 | |
df323337 SAS |
47 | union aa_buffer { |
48 | struct list_head list; | |
49 | char buffer[1]; | |
50 | }; | |
d4669f0b | 51 | |
341c1fda JJ |
52 | #define RESERVE_COUNT 2 |
53 | static int reserve_count = RESERVE_COUNT; | |
54 | static int buffer_count; | |
d4669f0b | 55 | |
df323337 SAS |
56 | static LIST_HEAD(aa_global_buffers); |
57 | static DEFINE_SPINLOCK(aa_buffers_lock); | |
d4669f0b | 58 | |
b5e95b48 JJ |
59 | /* |
60 | * LSM hook functions | |
61 | */ | |
62 | ||
63 | /* | |
d9087c49 | 64 | * put the associated labels |
b5e95b48 JJ |
65 | */ |
66 | static void apparmor_cred_free(struct cred *cred) | |
67 | { | |
d9087c49 | 68 | aa_put_label(cred_label(cred)); |
69b5a44a | 69 | set_cred_label(cred, NULL); |
b5e95b48 JJ |
70 | } |
71 | ||
72 | /* | |
73 | * allocate the apparmor part of blank credentials | |
74 | */ | |
75 | static int apparmor_cred_alloc_blank(struct cred *cred, gfp_t gfp) | |
76 | { | |
69b5a44a | 77 | set_cred_label(cred, NULL); |
b5e95b48 JJ |
78 | return 0; |
79 | } | |
80 | ||
81 | /* | |
d9087c49 | 82 | * prepare new cred label for modification by prepare_cred block |
b5e95b48 JJ |
83 | */ |
84 | static int apparmor_cred_prepare(struct cred *new, const struct cred *old, | |
85 | gfp_t gfp) | |
86 | { | |
69b5a44a | 87 | set_cred_label(new, aa_get_newest_label(cred_label(old))); |
b5e95b48 JJ |
88 | return 0; |
89 | } | |
90 | ||
91 | /* | |
92 | * transfer the apparmor data to a blank set of creds | |
93 | */ | |
94 | static void apparmor_cred_transfer(struct cred *new, const struct cred *old) | |
95 | { | |
69b5a44a | 96 | set_cred_label(new, aa_get_newest_label(cred_label(old))); |
b5e95b48 JJ |
97 | } |
98 | ||
3b529a76 JJ |
99 | static void apparmor_task_free(struct task_struct *task) |
100 | { | |
101 | ||
102 | aa_free_task_ctx(task_ctx(task)); | |
3b529a76 JJ |
103 | } |
104 | ||
105 | static int apparmor_task_alloc(struct task_struct *task, | |
106 | unsigned long clone_flags) | |
107 | { | |
f4ad8f2c | 108 | struct aa_task_ctx *new = task_ctx(task); |
3b529a76 | 109 | |
de62de59 | 110 | aa_dup_task_ctx(new, task_ctx(current)); |
b5e95b48 | 111 | |
3b529a76 | 112 | return 0; |
b5e95b48 JJ |
113 | } |
114 | ||
115 | static int apparmor_ptrace_access_check(struct task_struct *child, | |
116 | unsigned int mode) | |
117 | { | |
b2d09ae4 JJ |
118 | struct aa_label *tracer, *tracee; |
119 | int error; | |
120 | ||
1f8266ff | 121 | tracer = __begin_current_label_crit_section(); |
b2d09ae4 JJ |
122 | tracee = aa_get_task_label(child); |
123 | error = aa_may_ptrace(tracer, tracee, | |
338d0be4 JJ |
124 | (mode & PTRACE_MODE_READ) ? AA_PTRACE_READ |
125 | : AA_PTRACE_TRACE); | |
b2d09ae4 | 126 | aa_put_label(tracee); |
1f8266ff | 127 | __end_current_label_crit_section(tracer); |
b2d09ae4 JJ |
128 | |
129 | return error; | |
b5e95b48 JJ |
130 | } |
131 | ||
132 | static int apparmor_ptrace_traceme(struct task_struct *parent) | |
133 | { | |
b2d09ae4 JJ |
134 | struct aa_label *tracer, *tracee; |
135 | int error; | |
136 | ||
ca3fde52 | 137 | tracee = __begin_current_label_crit_section(); |
b2d09ae4 JJ |
138 | tracer = aa_get_task_label(parent); |
139 | error = aa_may_ptrace(tracer, tracee, AA_PTRACE_TRACE); | |
140 | aa_put_label(tracer); | |
ca3fde52 | 141 | __end_current_label_crit_section(tracee); |
b2d09ae4 JJ |
142 | |
143 | return error; | |
b5e95b48 JJ |
144 | } |
145 | ||
146 | /* Derived from security/commoncap.c:cap_capget */ | |
147 | static int apparmor_capget(struct task_struct *target, kernel_cap_t *effective, | |
148 | kernel_cap_t *inheritable, kernel_cap_t *permitted) | |
149 | { | |
637f688d | 150 | struct aa_label *label; |
b5e95b48 JJ |
151 | const struct cred *cred; |
152 | ||
153 | rcu_read_lock(); | |
154 | cred = __task_cred(target); | |
637f688d | 155 | label = aa_get_newest_cred_label(cred); |
c70c86c4 | 156 | |
b1d9e6b0 CS |
157 | /* |
158 | * cap_capget is stacked ahead of this and will | |
159 | * initialize effective and permitted. | |
160 | */ | |
c70c86c4 JJ |
161 | if (!unconfined(label)) { |
162 | struct aa_profile *profile; | |
163 | struct label_it i; | |
164 | ||
165 | label_for_each_confined(i, label, profile) { | |
1ad22fcc | 166 | struct aa_ruleset *rules; |
c70c86c4 JJ |
167 | if (COMPLAIN_MODE(profile)) |
168 | continue; | |
1ad22fcc JJ |
169 | rules = list_first_entry(&profile->rules, |
170 | typeof(*rules), list); | |
c70c86c4 | 171 | *effective = cap_intersect(*effective, |
1ad22fcc | 172 | rules->caps.allow); |
c70c86c4 | 173 | *permitted = cap_intersect(*permitted, |
1ad22fcc | 174 | rules->caps.allow); |
c70c86c4 | 175 | } |
b5e95b48 JJ |
176 | } |
177 | rcu_read_unlock(); | |
637f688d | 178 | aa_put_label(label); |
b5e95b48 JJ |
179 | |
180 | return 0; | |
181 | } | |
182 | ||
6a9de491 | 183 | static int apparmor_capable(const struct cred *cred, struct user_namespace *ns, |
c1a85a00 | 184 | int cap, unsigned int opts) |
b5e95b48 | 185 | { |
637f688d | 186 | struct aa_label *label; |
b1d9e6b0 CS |
187 | int error = 0; |
188 | ||
637f688d JJ |
189 | label = aa_get_newest_cred_label(cred); |
190 | if (!unconfined(label)) | |
c1a85a00 | 191 | error = aa_capable(label, cap, opts); |
637f688d | 192 | aa_put_label(label); |
cf797c0e | 193 | |
b5e95b48 JJ |
194 | return error; |
195 | } | |
196 | ||
197 | /** | |
198 | * common_perm - basic common permission check wrapper fn for paths | |
199 | * @op: operation being checked | |
200 | * @path: path to check permission of (NOT NULL) | |
201 | * @mask: requested permissions mask | |
202 | * @cond: conditional info for the permission request (NOT NULL) | |
203 | * | |
204 | * Returns: %0 else error code if error or permission denied | |
205 | */ | |
47f6e5cc | 206 | static int common_perm(const char *op, const struct path *path, u32 mask, |
b5e95b48 JJ |
207 | struct path_cond *cond) |
208 | { | |
637f688d | 209 | struct aa_label *label; |
b5e95b48 JJ |
210 | int error = 0; |
211 | ||
637f688d JJ |
212 | label = __begin_current_label_crit_section(); |
213 | if (!unconfined(label)) | |
aebd873e | 214 | error = aa_path_perm(op, label, path, 0, mask, cond); |
637f688d | 215 | __end_current_label_crit_section(label); |
b5e95b48 JJ |
216 | |
217 | return error; | |
218 | } | |
219 | ||
220 | /** | |
31f75bfe | 221 | * common_perm_cond - common permission wrapper around inode cond |
b5e95b48 | 222 | * @op: operation being checked |
31f75bfe | 223 | * @path: location to check (NOT NULL) |
b5e95b48 | 224 | * @mask: requested permissions mask |
b5e95b48 JJ |
225 | * |
226 | * Returns: %0 else error code if error or permission denied | |
227 | */ | |
31f75bfe | 228 | static int common_perm_cond(const char *op, const struct path *path, u32 mask) |
b5e95b48 | 229 | { |
e67fe633 | 230 | vfsuid_t vfsuid = i_uid_into_vfsuid(mnt_idmap(path->mnt), |
5e26a01e | 231 | d_backing_inode(path->dentry)); |
3cee6079 | 232 | struct path_cond cond = { |
5e26a01e | 233 | vfsuid_into_kuid(vfsuid), |
3cee6079 | 234 | d_backing_inode(path->dentry)->i_mode |
31f75bfe | 235 | }; |
b5e95b48 | 236 | |
31f75bfe JJ |
237 | if (!path_mediated_fs(path->dentry)) |
238 | return 0; | |
239 | ||
240 | return common_perm(op, path, mask, &cond); | |
b5e95b48 JJ |
241 | } |
242 | ||
243 | /** | |
31f75bfe | 244 | * common_perm_dir_dentry - common permission wrapper when path is dir, dentry |
b5e95b48 | 245 | * @op: operation being checked |
31f75bfe JJ |
246 | * @dir: directory of the dentry (NOT NULL) |
247 | * @dentry: dentry to check (NOT NULL) | |
b5e95b48 | 248 | * @mask: requested permissions mask |
31f75bfe | 249 | * @cond: conditional info for the permission request (NOT NULL) |
b5e95b48 JJ |
250 | * |
251 | * Returns: %0 else error code if error or permission denied | |
252 | */ | |
31f75bfe JJ |
253 | static int common_perm_dir_dentry(const char *op, const struct path *dir, |
254 | struct dentry *dentry, u32 mask, | |
255 | struct path_cond *cond) | |
b5e95b48 | 256 | { |
31f75bfe | 257 | struct path path = { .mnt = dir->mnt, .dentry = dentry }; |
b5e95b48 | 258 | |
31f75bfe | 259 | return common_perm(op, &path, mask, cond); |
b5e95b48 JJ |
260 | } |
261 | ||
262 | /** | |
263 | * common_perm_rm - common permission wrapper for operations doing rm | |
264 | * @op: operation being checked | |
265 | * @dir: directory that the dentry is in (NOT NULL) | |
266 | * @dentry: dentry being rm'd (NOT NULL) | |
267 | * @mask: requested permission mask | |
268 | * | |
269 | * Returns: %0 else error code if error or permission denied | |
270 | */ | |
47f6e5cc | 271 | static int common_perm_rm(const char *op, const struct path *dir, |
b5e95b48 JJ |
272 | struct dentry *dentry, u32 mask) |
273 | { | |
c6f493d6 | 274 | struct inode *inode = d_backing_inode(dentry); |
b5e95b48 | 275 | struct path_cond cond = { }; |
5e26a01e | 276 | vfsuid_t vfsuid; |
b5e95b48 | 277 | |
efeee83a | 278 | if (!inode || !path_mediated_fs(dentry)) |
b5e95b48 JJ |
279 | return 0; |
280 | ||
e67fe633 | 281 | vfsuid = i_uid_into_vfsuid(mnt_idmap(dir->mnt), inode); |
5e26a01e | 282 | cond.uid = vfsuid_into_kuid(vfsuid); |
b5e95b48 JJ |
283 | cond.mode = inode->i_mode; |
284 | ||
285 | return common_perm_dir_dentry(op, dir, dentry, mask, &cond); | |
286 | } | |
287 | ||
288 | /** | |
289 | * common_perm_create - common permission wrapper for operations doing create | |
290 | * @op: operation being checked | |
291 | * @dir: directory that dentry will be created in (NOT NULL) | |
292 | * @dentry: dentry to create (NOT NULL) | |
293 | * @mask: request permission mask | |
294 | * @mode: created file mode | |
295 | * | |
296 | * Returns: %0 else error code if error or permission denied | |
297 | */ | |
47f6e5cc | 298 | static int common_perm_create(const char *op, const struct path *dir, |
d6b49f7a | 299 | struct dentry *dentry, u32 mask, umode_t mode) |
b5e95b48 JJ |
300 | { |
301 | struct path_cond cond = { current_fsuid(), mode }; | |
302 | ||
efeee83a | 303 | if (!path_mediated_fs(dir->dentry)) |
b5e95b48 JJ |
304 | return 0; |
305 | ||
306 | return common_perm_dir_dentry(op, dir, dentry, mask, &cond); | |
307 | } | |
308 | ||
989f74e0 | 309 | static int apparmor_path_unlink(const struct path *dir, struct dentry *dentry) |
b5e95b48 JJ |
310 | { |
311 | return common_perm_rm(OP_UNLINK, dir, dentry, AA_MAY_DELETE); | |
312 | } | |
313 | ||
d3607752 | 314 | static int apparmor_path_mkdir(const struct path *dir, struct dentry *dentry, |
4572befe | 315 | umode_t mode) |
b5e95b48 JJ |
316 | { |
317 | return common_perm_create(OP_MKDIR, dir, dentry, AA_MAY_CREATE, | |
318 | S_IFDIR); | |
319 | } | |
320 | ||
989f74e0 | 321 | static int apparmor_path_rmdir(const struct path *dir, struct dentry *dentry) |
b5e95b48 JJ |
322 | { |
323 | return common_perm_rm(OP_RMDIR, dir, dentry, AA_MAY_DELETE); | |
324 | } | |
325 | ||
d3607752 | 326 | static int apparmor_path_mknod(const struct path *dir, struct dentry *dentry, |
04fc66e7 | 327 | umode_t mode, unsigned int dev) |
b5e95b48 JJ |
328 | { |
329 | return common_perm_create(OP_MKNOD, dir, dentry, AA_MAY_CREATE, mode); | |
330 | } | |
331 | ||
81f4c506 | 332 | static int apparmor_path_truncate(const struct path *path) |
b5e95b48 | 333 | { |
e53cfe6c | 334 | return common_perm_cond(OP_TRUNC, path, MAY_WRITE | AA_MAY_SETATTR); |
b5e95b48 JJ |
335 | } |
336 | ||
3350607d GN |
337 | static int apparmor_file_truncate(struct file *file) |
338 | { | |
339 | return apparmor_path_truncate(&file->f_path); | |
340 | } | |
341 | ||
d3607752 | 342 | static int apparmor_path_symlink(const struct path *dir, struct dentry *dentry, |
b5e95b48 JJ |
343 | const char *old_name) |
344 | { | |
345 | return common_perm_create(OP_SYMLINK, dir, dentry, AA_MAY_CREATE, | |
346 | S_IFLNK); | |
347 | } | |
348 | ||
3ccee46a | 349 | static int apparmor_path_link(struct dentry *old_dentry, const struct path *new_dir, |
b5e95b48 JJ |
350 | struct dentry *new_dentry) |
351 | { | |
637f688d | 352 | struct aa_label *label; |
b5e95b48 JJ |
353 | int error = 0; |
354 | ||
efeee83a | 355 | if (!path_mediated_fs(old_dentry)) |
b5e95b48 JJ |
356 | return 0; |
357 | ||
637f688d JJ |
358 | label = begin_current_label_crit_section(); |
359 | if (!unconfined(label)) | |
8014370f | 360 | error = aa_path_link(label, old_dentry, new_dir, new_dentry); |
637f688d | 361 | end_current_label_crit_section(label); |
cf797c0e | 362 | |
b5e95b48 JJ |
363 | return error; |
364 | } | |
365 | ||
3ccee46a | 366 | static int apparmor_path_rename(const struct path *old_dir, struct dentry *old_dentry, |
100f59d9 MS |
367 | const struct path *new_dir, struct dentry *new_dentry, |
368 | const unsigned int flags) | |
b5e95b48 | 369 | { |
637f688d | 370 | struct aa_label *label; |
b5e95b48 JJ |
371 | int error = 0; |
372 | ||
efeee83a | 373 | if (!path_mediated_fs(old_dentry)) |
b5e95b48 | 374 | return 0; |
100f59d9 MS |
375 | if ((flags & RENAME_EXCHANGE) && !path_mediated_fs(new_dentry)) |
376 | return 0; | |
b5e95b48 | 377 | |
637f688d JJ |
378 | label = begin_current_label_crit_section(); |
379 | if (!unconfined(label)) { | |
e67fe633 | 380 | struct mnt_idmap *idmap = mnt_idmap(old_dir->mnt); |
5e26a01e | 381 | vfsuid_t vfsuid; |
8486adf0 KC |
382 | struct path old_path = { .mnt = old_dir->mnt, |
383 | .dentry = old_dentry }; | |
384 | struct path new_path = { .mnt = new_dir->mnt, | |
385 | .dentry = new_dentry }; | |
3cee6079 | 386 | struct path_cond cond = { |
5e26a01e | 387 | .mode = d_backing_inode(old_dentry)->i_mode |
b5e95b48 | 388 | }; |
e67fe633 | 389 | vfsuid = i_uid_into_vfsuid(idmap, d_backing_inode(old_dentry)); |
5e26a01e | 390 | cond.uid = vfsuid_into_kuid(vfsuid); |
b5e95b48 | 391 | |
100f59d9 MS |
392 | if (flags & RENAME_EXCHANGE) { |
393 | struct path_cond cond_exchange = { | |
5e26a01e | 394 | .mode = d_backing_inode(new_dentry)->i_mode, |
100f59d9 | 395 | }; |
e67fe633 | 396 | vfsuid = i_uid_into_vfsuid(idmap, d_backing_inode(old_dentry)); |
5e26a01e | 397 | cond_exchange.uid = vfsuid_into_kuid(vfsuid); |
100f59d9 MS |
398 | |
399 | error = aa_path_perm(OP_RENAME_SRC, label, &new_path, 0, | |
400 | MAY_READ | AA_MAY_GETATTR | MAY_WRITE | | |
401 | AA_MAY_SETATTR | AA_MAY_DELETE, | |
402 | &cond_exchange); | |
403 | if (!error) | |
404 | error = aa_path_perm(OP_RENAME_DEST, label, &old_path, | |
405 | 0, MAY_WRITE | AA_MAY_SETATTR | | |
406 | AA_MAY_CREATE, &cond_exchange); | |
407 | } | |
408 | ||
409 | if (!error) | |
410 | error = aa_path_perm(OP_RENAME_SRC, label, &old_path, 0, | |
411 | MAY_READ | AA_MAY_GETATTR | MAY_WRITE | | |
412 | AA_MAY_SETATTR | AA_MAY_DELETE, | |
413 | &cond); | |
b5e95b48 | 414 | if (!error) |
aebd873e | 415 | error = aa_path_perm(OP_RENAME_DEST, label, &new_path, |
e53cfe6c | 416 | 0, MAY_WRITE | AA_MAY_SETATTR | |
b5e95b48 JJ |
417 | AA_MAY_CREATE, &cond); |
418 | ||
419 | } | |
637f688d | 420 | end_current_label_crit_section(label); |
cf797c0e | 421 | |
b5e95b48 JJ |
422 | return error; |
423 | } | |
424 | ||
be01f9f2 | 425 | static int apparmor_path_chmod(const struct path *path, umode_t mode) |
b5e95b48 | 426 | { |
31f75bfe | 427 | return common_perm_cond(OP_CHMOD, path, AA_MAY_CHMOD); |
b5e95b48 JJ |
428 | } |
429 | ||
7fd25dac | 430 | static int apparmor_path_chown(const struct path *path, kuid_t uid, kgid_t gid) |
b5e95b48 | 431 | { |
31f75bfe | 432 | return common_perm_cond(OP_CHOWN, path, AA_MAY_CHOWN); |
b5e95b48 JJ |
433 | } |
434 | ||
3f7036a0 | 435 | static int apparmor_inode_getattr(const struct path *path) |
b5e95b48 | 436 | { |
e53cfe6c | 437 | return common_perm_cond(OP_GETATTR, path, AA_MAY_GETATTR); |
b5e95b48 JJ |
438 | } |
439 | ||
94817692 | 440 | static int apparmor_file_open(struct file *file) |
b5e95b48 | 441 | { |
637f688d JJ |
442 | struct aa_file_ctx *fctx = file_ctx(file); |
443 | struct aa_label *label; | |
b5e95b48 JJ |
444 | int error = 0; |
445 | ||
efeee83a | 446 | if (!path_mediated_fs(file->f_path.dentry)) |
b5e95b48 JJ |
447 | return 0; |
448 | ||
449 | /* If in exec, permission is handled by bprm hooks. | |
450 | * Cache permissions granted by the previous exec check, with | |
451 | * implicit read and executable mmap which are required to | |
452 | * actually execute the image. | |
453 | */ | |
454 | if (current->in_execve) { | |
55a26ebf | 455 | fctx->allow = MAY_EXEC | MAY_READ | AA_EXEC_MMAP; |
b5e95b48 JJ |
456 | return 0; |
457 | } | |
458 | ||
94817692 | 459 | label = aa_get_newest_cred_label(file->f_cred); |
637f688d | 460 | if (!unconfined(label)) { |
e67fe633 | 461 | struct mnt_idmap *idmap = file_mnt_idmap(file); |
496ad9aa | 462 | struct inode *inode = file_inode(file); |
5e26a01e | 463 | vfsuid_t vfsuid; |
3cee6079 | 464 | struct path_cond cond = { |
5e26a01e | 465 | .mode = inode->i_mode, |
3cee6079 | 466 | }; |
e67fe633 | 467 | vfsuid = i_uid_into_vfsuid(idmap, inode); |
5e26a01e | 468 | cond.uid = vfsuid_into_kuid(vfsuid); |
b5e95b48 | 469 | |
aebd873e | 470 | error = aa_path_perm(OP_OPEN, label, &file->f_path, 0, |
b5e95b48 JJ |
471 | aa_map_file_to_perms(file), &cond); |
472 | /* todo cache full allowed permissions set and state */ | |
55a26ebf | 473 | fctx->allow = aa_map_file_to_perms(file); |
b5e95b48 | 474 | } |
637f688d | 475 | aa_put_label(label); |
b5e95b48 JJ |
476 | |
477 | return error; | |
478 | } | |
479 | ||
480 | static int apparmor_file_alloc_security(struct file *file) | |
481 | { | |
33bf60ca | 482 | struct aa_file_ctx *ctx = file_ctx(file); |
637f688d | 483 | struct aa_label *label = begin_current_label_crit_section(); |
b5e95b48 | 484 | |
33bf60ca CS |
485 | spin_lock_init(&ctx->lock); |
486 | rcu_assign_pointer(ctx->label, aa_get_label(label)); | |
487 | end_current_label_crit_section(label); | |
488 | return 0; | |
b5e95b48 JJ |
489 | } |
490 | ||
491 | static void apparmor_file_free_security(struct file *file) | |
492 | { | |
33bf60ca CS |
493 | struct aa_file_ctx *ctx = file_ctx(file); |
494 | ||
495 | if (ctx) | |
496 | aa_put_label(rcu_access_pointer(ctx->label)); | |
b5e95b48 JJ |
497 | } |
498 | ||
341c1fda JJ |
499 | static int common_file_perm(const char *op, struct file *file, u32 mask, |
500 | bool in_atomic) | |
b5e95b48 | 501 | { |
190a9518 | 502 | struct aa_label *label; |
b5e95b48 JJ |
503 | int error = 0; |
504 | ||
192ca6b5 JJ |
505 | /* don't reaudit files closed during inheritance */ |
506 | if (file->f_path.dentry == aa_null.dentry) | |
507 | return -EACCES; | |
508 | ||
637f688d | 509 | label = __begin_current_label_crit_section(); |
341c1fda | 510 | error = aa_file_perm(op, label, file, mask, in_atomic); |
637f688d | 511 | __end_current_label_crit_section(label); |
b5e95b48 JJ |
512 | |
513 | return error; | |
514 | } | |
515 | ||
064dc947 JJ |
516 | static int apparmor_file_receive(struct file *file) |
517 | { | |
341c1fda JJ |
518 | return common_file_perm(OP_FRECEIVE, file, aa_map_file_to_perms(file), |
519 | false); | |
064dc947 JJ |
520 | } |
521 | ||
b5e95b48 JJ |
522 | static int apparmor_file_permission(struct file *file, int mask) |
523 | { | |
341c1fda | 524 | return common_file_perm(OP_FPERM, file, mask, false); |
b5e95b48 JJ |
525 | } |
526 | ||
527 | static int apparmor_file_lock(struct file *file, unsigned int cmd) | |
528 | { | |
529 | u32 mask = AA_MAY_LOCK; | |
530 | ||
531 | if (cmd == F_WRLCK) | |
532 | mask |= MAY_WRITE; | |
533 | ||
341c1fda | 534 | return common_file_perm(OP_FLOCK, file, mask, false); |
b5e95b48 JJ |
535 | } |
536 | ||
47f6e5cc | 537 | static int common_mmap(const char *op, struct file *file, unsigned long prot, |
341c1fda | 538 | unsigned long flags, bool in_atomic) |
b5e95b48 | 539 | { |
b5e95b48 JJ |
540 | int mask = 0; |
541 | ||
637f688d | 542 | if (!file || !file_ctx(file)) |
b5e95b48 JJ |
543 | return 0; |
544 | ||
545 | if (prot & PROT_READ) | |
546 | mask |= MAY_READ; | |
547 | /* | |
548 | * Private mappings don't require write perms since they don't | |
549 | * write back to the files | |
550 | */ | |
551 | if ((prot & PROT_WRITE) && !(flags & MAP_PRIVATE)) | |
552 | mask |= MAY_WRITE; | |
553 | if (prot & PROT_EXEC) | |
554 | mask |= AA_EXEC_MMAP; | |
555 | ||
341c1fda | 556 | return common_file_perm(op, file, mask, in_atomic); |
b5e95b48 JJ |
557 | } |
558 | ||
e5467859 AV |
559 | static int apparmor_mmap_file(struct file *file, unsigned long reqprot, |
560 | unsigned long prot, unsigned long flags) | |
b5e95b48 | 561 | { |
341c1fda | 562 | return common_mmap(OP_FMMAP, file, prot, flags, GFP_ATOMIC); |
b5e95b48 JJ |
563 | } |
564 | ||
565 | static int apparmor_file_mprotect(struct vm_area_struct *vma, | |
566 | unsigned long reqprot, unsigned long prot) | |
567 | { | |
568 | return common_mmap(OP_FMPROT, vma->vm_file, prot, | |
341c1fda JJ |
569 | !(vma->vm_flags & VM_SHARED) ? MAP_PRIVATE : 0, |
570 | false); | |
b5e95b48 JJ |
571 | } |
572 | ||
2ea3ffb7 JJ |
573 | static int apparmor_sb_mount(const char *dev_name, const struct path *path, |
574 | const char *type, unsigned long flags, void *data) | |
575 | { | |
576 | struct aa_label *label; | |
577 | int error = 0; | |
578 | ||
579 | /* Discard magic */ | |
580 | if ((flags & MS_MGC_MSK) == MS_MGC_VAL) | |
581 | flags &= ~MS_MGC_MSK; | |
582 | ||
583 | flags &= ~AA_MS_IGNORE_MASK; | |
584 | ||
585 | label = __begin_current_label_crit_section(); | |
586 | if (!unconfined(label)) { | |
587 | if (flags & MS_REMOUNT) | |
588 | error = aa_remount(label, path, flags, data); | |
589 | else if (flags & MS_BIND) | |
590 | error = aa_bind_mount(label, path, dev_name, flags); | |
591 | else if (flags & (MS_SHARED | MS_PRIVATE | MS_SLAVE | | |
592 | MS_UNBINDABLE)) | |
593 | error = aa_mount_change_type(label, path, flags); | |
594 | else if (flags & MS_MOVE) | |
595 | error = aa_move_mount(label, path, dev_name); | |
596 | else | |
597 | error = aa_new_mount(label, dev_name, path, type, | |
598 | flags, data); | |
599 | } | |
600 | __end_current_label_crit_section(label); | |
601 | ||
602 | return error; | |
603 | } | |
604 | ||
605 | static int apparmor_sb_umount(struct vfsmount *mnt, int flags) | |
606 | { | |
607 | struct aa_label *label; | |
608 | int error = 0; | |
609 | ||
610 | label = __begin_current_label_crit_section(); | |
611 | if (!unconfined(label)) | |
612 | error = aa_umount(label, mnt, flags); | |
613 | __end_current_label_crit_section(label); | |
614 | ||
615 | return error; | |
616 | } | |
617 | ||
618 | static int apparmor_sb_pivotroot(const struct path *old_path, | |
619 | const struct path *new_path) | |
620 | { | |
621 | struct aa_label *label; | |
622 | int error = 0; | |
623 | ||
624 | label = aa_get_current_label(); | |
625 | if (!unconfined(label)) | |
626 | error = aa_pivotroot(label, old_path, new_path); | |
627 | aa_put_label(label); | |
628 | ||
629 | return error; | |
630 | } | |
631 | ||
c8e477c6 | 632 | static int apparmor_getprocattr(struct task_struct *task, const char *name, |
b5e95b48 JJ |
633 | char **value) |
634 | { | |
635 | int error = -ENOENT; | |
b5e95b48 JJ |
636 | /* released below */ |
637 | const struct cred *cred = get_task_cred(task); | |
de62de59 | 638 | struct aa_task_ctx *ctx = task_ctx(current); |
637f688d | 639 | struct aa_label *label = NULL; |
b5e95b48 JJ |
640 | |
641 | if (strcmp(name, "current") == 0) | |
d9087c49 | 642 | label = aa_get_newest_label(cred_label(cred)); |
55a26ebf | 643 | else if (strcmp(name, "prev") == 0 && ctx->previous) |
637f688d | 644 | label = aa_get_newest_label(ctx->previous); |
55a26ebf | 645 | else if (strcmp(name, "exec") == 0 && ctx->onexec) |
637f688d | 646 | label = aa_get_newest_label(ctx->onexec); |
b5e95b48 JJ |
647 | else |
648 | error = -EINVAL; | |
649 | ||
637f688d | 650 | if (label) |
76a1d263 | 651 | error = aa_getprocattr(label, value); |
77b071b3 | 652 | |
637f688d | 653 | aa_put_label(label); |
b5e95b48 JJ |
654 | put_cred(cred); |
655 | ||
656 | return error; | |
657 | } | |
658 | ||
b21507e2 SS |
659 | static int apparmor_setprocattr(const char *name, void *value, |
660 | size_t size) | |
b5e95b48 | 661 | { |
e89b8081 | 662 | char *command, *largs = NULL, *args = value; |
b5e95b48 JJ |
663 | size_t arg_size; |
664 | int error; | |
8c4b785a JJ |
665 | DEFINE_AUDIT_DATA(sa, LSM_AUDIT_DATA_NONE, AA_CLASS_NONE, |
666 | OP_SETPROCATTR); | |
b5e95b48 JJ |
667 | |
668 | if (size == 0) | |
669 | return -EINVAL; | |
b5e95b48 | 670 | |
e89b8081 VN |
671 | /* AppArmor requires that the buffer must be null terminated atm */ |
672 | if (args[size - 1] != '\0') { | |
673 | /* null terminate */ | |
674 | largs = args = kmalloc(size + 1, GFP_KERNEL); | |
675 | if (!args) | |
676 | return -ENOMEM; | |
677 | memcpy(args, value, size); | |
678 | args[size] = '\0'; | |
679 | } | |
680 | ||
681 | error = -EINVAL; | |
b5e95b48 JJ |
682 | args = strim(args); |
683 | command = strsep(&args, " "); | |
684 | if (!args) | |
e89b8081 | 685 | goto out; |
b5e95b48 JJ |
686 | args = skip_spaces(args); |
687 | if (!*args) | |
e89b8081 | 688 | goto out; |
b5e95b48 | 689 | |
d4d03f74 | 690 | arg_size = size - (args - (largs ? largs : (char *) value)); |
b5e95b48 JJ |
691 | if (strcmp(name, "current") == 0) { |
692 | if (strcmp(command, "changehat") == 0) { | |
693 | error = aa_setprocattr_changehat(args, arg_size, | |
df8073c6 | 694 | AA_CHANGE_NOFLAGS); |
b5e95b48 JJ |
695 | } else if (strcmp(command, "permhat") == 0) { |
696 | error = aa_setprocattr_changehat(args, arg_size, | |
df8073c6 | 697 | AA_CHANGE_TEST); |
b5e95b48 | 698 | } else if (strcmp(command, "changeprofile") == 0) { |
df8073c6 | 699 | error = aa_change_profile(args, AA_CHANGE_NOFLAGS); |
b5e95b48 | 700 | } else if (strcmp(command, "permprofile") == 0) { |
df8073c6 | 701 | error = aa_change_profile(args, AA_CHANGE_TEST); |
6c5fc8f1 JJ |
702 | } else if (strcmp(command, "stack") == 0) { |
703 | error = aa_change_profile(args, AA_CHANGE_STACK); | |
3eea57c2 JJ |
704 | } else |
705 | goto fail; | |
b5e95b48 | 706 | } else if (strcmp(name, "exec") == 0) { |
3eea57c2 | 707 | if (strcmp(command, "exec") == 0) |
df8073c6 | 708 | error = aa_change_profile(args, AA_CHANGE_ONEXEC); |
6c5fc8f1 JJ |
709 | else if (strcmp(command, "stack") == 0) |
710 | error = aa_change_profile(args, (AA_CHANGE_ONEXEC | | |
711 | AA_CHANGE_STACK)); | |
3eea57c2 JJ |
712 | else |
713 | goto fail; | |
714 | } else | |
b5e95b48 | 715 | /* only support the "current" and "exec" process attributes */ |
e89b8081 | 716 | goto fail; |
3eea57c2 | 717 | |
b5e95b48 JJ |
718 | if (!error) |
719 | error = size; | |
e89b8081 VN |
720 | out: |
721 | kfree(largs); | |
b5e95b48 | 722 | return error; |
3eea57c2 JJ |
723 | |
724 | fail: | |
637f688d | 725 | aad(&sa)->label = begin_current_label_crit_section(); |
ef88a7ac JJ |
726 | aad(&sa)->info = name; |
727 | aad(&sa)->error = error = -EINVAL; | |
3eea57c2 | 728 | aa_audit_msg(AUDIT_APPARMOR_DENIED, &sa, NULL); |
637f688d | 729 | end_current_label_crit_section(aad(&sa)->label); |
e89b8081 | 730 | goto out; |
b5e95b48 JJ |
731 | } |
732 | ||
fe864821 JJ |
733 | /** |
734 | * apparmor_bprm_committing_creds - do task cleanup on committing new creds | |
735 | * @bprm: binprm for the exec (NOT NULL) | |
736 | */ | |
737 | static void apparmor_bprm_committing_creds(struct linux_binprm *bprm) | |
738 | { | |
637f688d | 739 | struct aa_label *label = aa_current_raw_label(); |
d9087c49 | 740 | struct aa_label *new_label = cred_label(bprm->cred); |
fe864821 JJ |
741 | |
742 | /* bail out if unconfined or not changing profile */ | |
d9087c49 JJ |
743 | if ((new_label->proxy == label->proxy) || |
744 | (unconfined(new_label))) | |
fe864821 JJ |
745 | return; |
746 | ||
192ca6b5 JJ |
747 | aa_inherit_files(bprm->cred, current->files); |
748 | ||
fe864821 JJ |
749 | current->pdeath_signal = 0; |
750 | ||
637f688d | 751 | /* reset soft limits and set hard limits for the new label */ |
d9087c49 | 752 | __aa_transition_rlimits(label, new_label); |
fe864821 JJ |
753 | } |
754 | ||
755 | /** | |
391f1211 | 756 | * apparmor_bprm_committed_creds() - do cleanup after new creds committed |
fe864821 JJ |
757 | * @bprm: binprm for the exec (NOT NULL) |
758 | */ | |
759 | static void apparmor_bprm_committed_creds(struct linux_binprm *bprm) | |
760 | { | |
3b529a76 | 761 | /* clear out temporary/transitional state from the context */ |
de62de59 | 762 | aa_clear_task_ctx_trans(task_ctx(current)); |
3b529a76 | 763 | |
fe864821 JJ |
764 | return; |
765 | } | |
766 | ||
6326948f PM |
767 | static void apparmor_current_getsecid_subj(u32 *secid) |
768 | { | |
769 | struct aa_label *label = aa_get_current_label(); | |
770 | *secid = label->secid; | |
771 | aa_put_label(label); | |
772 | } | |
773 | ||
774 | static void apparmor_task_getsecid_obj(struct task_struct *p, u32 *secid) | |
a7ae3645 JJ |
775 | { |
776 | struct aa_label *label = aa_get_task_label(p); | |
777 | *secid = label->secid; | |
778 | aa_put_label(label); | |
779 | } | |
780 | ||
7cb4dc9f JS |
781 | static int apparmor_task_setrlimit(struct task_struct *task, |
782 | unsigned int resource, struct rlimit *new_rlim) | |
b5e95b48 | 783 | { |
637f688d | 784 | struct aa_label *label = __begin_current_label_crit_section(); |
b5e95b48 JJ |
785 | int error = 0; |
786 | ||
637f688d | 787 | if (!unconfined(label)) |
86b92cb7 | 788 | error = aa_task_setrlimit(label, task, resource, new_rlim); |
637f688d | 789 | __end_current_label_crit_section(label); |
b5e95b48 JJ |
790 | |
791 | return error; | |
792 | } | |
793 | ||
ae7795bc | 794 | static int apparmor_task_kill(struct task_struct *target, struct kernel_siginfo *info, |
6b4f3d01 | 795 | int sig, const struct cred *cred) |
cd1dbf76 JJ |
796 | { |
797 | struct aa_label *cl, *tl; | |
798 | int error; | |
799 | ||
6b4f3d01 SS |
800 | if (cred) { |
801 | /* | |
802 | * Dealing with USB IO specific behavior | |
cd1dbf76 | 803 | */ |
6b4f3d01 SS |
804 | cl = aa_get_newest_cred_label(cred); |
805 | tl = aa_get_task_label(target); | |
806 | error = aa_may_signal(cl, tl, sig); | |
807 | aa_put_label(cl); | |
808 | aa_put_label(tl); | |
809 | return error; | |
810 | } | |
811 | ||
cd1dbf76 JJ |
812 | cl = __begin_current_label_crit_section(); |
813 | tl = aa_get_task_label(target); | |
814 | error = aa_may_signal(cl, tl, sig); | |
815 | aa_put_label(tl); | |
816 | __end_current_label_crit_section(cl); | |
817 | ||
818 | return error; | |
819 | } | |
820 | ||
56974a6f JJ |
821 | /** |
822 | * apparmor_sk_alloc_security - allocate and attach the sk_security field | |
823 | */ | |
824 | static int apparmor_sk_alloc_security(struct sock *sk, int family, gfp_t flags) | |
825 | { | |
826 | struct aa_sk_ctx *ctx; | |
827 | ||
828 | ctx = kzalloc(sizeof(*ctx), flags); | |
829 | if (!ctx) | |
830 | return -ENOMEM; | |
831 | ||
832 | SK_CTX(sk) = ctx; | |
833 | ||
834 | return 0; | |
835 | } | |
836 | ||
837 | /** | |
838 | * apparmor_sk_free_security - free the sk_security field | |
839 | */ | |
840 | static void apparmor_sk_free_security(struct sock *sk) | |
841 | { | |
842 | struct aa_sk_ctx *ctx = SK_CTX(sk); | |
843 | ||
844 | SK_CTX(sk) = NULL; | |
845 | aa_put_label(ctx->label); | |
846 | aa_put_label(ctx->peer); | |
847 | kfree(ctx); | |
848 | } | |
849 | ||
850 | /** | |
0fc6ab40 | 851 | * apparmor_sk_clone_security - clone the sk_security field |
56974a6f JJ |
852 | */ |
853 | static void apparmor_sk_clone_security(const struct sock *sk, | |
854 | struct sock *newsk) | |
855 | { | |
856 | struct aa_sk_ctx *ctx = SK_CTX(sk); | |
857 | struct aa_sk_ctx *new = SK_CTX(newsk); | |
858 | ||
3b646abc MFO |
859 | if (new->label) |
860 | aa_put_label(new->label); | |
56974a6f | 861 | new->label = aa_get_label(ctx->label); |
3b646abc MFO |
862 | |
863 | if (new->peer) | |
864 | aa_put_label(new->peer); | |
56974a6f JJ |
865 | new->peer = aa_get_label(ctx->peer); |
866 | } | |
867 | ||
868 | /** | |
869 | * apparmor_socket_create - check perms before creating a new socket | |
870 | */ | |
871 | static int apparmor_socket_create(int family, int type, int protocol, int kern) | |
872 | { | |
873 | struct aa_label *label; | |
874 | int error = 0; | |
875 | ||
876 | AA_BUG(in_interrupt()); | |
877 | ||
878 | label = begin_current_label_crit_section(); | |
879 | if (!(kern || unconfined(label))) | |
880 | error = af_select(family, | |
881 | create_perm(label, family, type, protocol), | |
882 | aa_af_perm(label, OP_CREATE, AA_MAY_CREATE, | |
883 | family, type, protocol)); | |
884 | end_current_label_crit_section(label); | |
885 | ||
886 | return error; | |
887 | } | |
888 | ||
889 | /** | |
890 | * apparmor_socket_post_create - setup the per-socket security struct | |
891 | * | |
892 | * Note: | |
893 | * - kernel sockets currently labeled unconfined but we may want to | |
894 | * move to a special kernel label | |
895 | * - socket may not have sk here if created with sock_create_lite or | |
896 | * sock_alloc. These should be accept cases which will be handled in | |
897 | * sock_graft. | |
898 | */ | |
899 | static int apparmor_socket_post_create(struct socket *sock, int family, | |
900 | int type, int protocol, int kern) | |
901 | { | |
902 | struct aa_label *label; | |
903 | ||
904 | if (kern) { | |
95c0581f | 905 | label = aa_get_label(kernel_t); |
56974a6f JJ |
906 | } else |
907 | label = aa_get_current_label(); | |
908 | ||
909 | if (sock->sk) { | |
910 | struct aa_sk_ctx *ctx = SK_CTX(sock->sk); | |
911 | ||
912 | aa_put_label(ctx->label); | |
913 | ctx->label = aa_get_label(label); | |
914 | } | |
915 | aa_put_label(label); | |
916 | ||
917 | return 0; | |
918 | } | |
919 | ||
920 | /** | |
921 | * apparmor_socket_bind - check perms before bind addr to socket | |
922 | */ | |
923 | static int apparmor_socket_bind(struct socket *sock, | |
924 | struct sockaddr *address, int addrlen) | |
925 | { | |
926 | AA_BUG(!sock); | |
927 | AA_BUG(!sock->sk); | |
928 | AA_BUG(!address); | |
929 | AA_BUG(in_interrupt()); | |
930 | ||
931 | return af_select(sock->sk->sk_family, | |
932 | bind_perm(sock, address, addrlen), | |
933 | aa_sk_perm(OP_BIND, AA_MAY_BIND, sock->sk)); | |
934 | } | |
935 | ||
936 | /** | |
937 | * apparmor_socket_connect - check perms before connecting @sock to @address | |
938 | */ | |
939 | static int apparmor_socket_connect(struct socket *sock, | |
940 | struct sockaddr *address, int addrlen) | |
941 | { | |
942 | AA_BUG(!sock); | |
943 | AA_BUG(!sock->sk); | |
944 | AA_BUG(!address); | |
945 | AA_BUG(in_interrupt()); | |
946 | ||
947 | return af_select(sock->sk->sk_family, | |
948 | connect_perm(sock, address, addrlen), | |
949 | aa_sk_perm(OP_CONNECT, AA_MAY_CONNECT, sock->sk)); | |
950 | } | |
951 | ||
952 | /** | |
0fc6ab40 | 953 | * apparmor_socket_listen - check perms before allowing listen |
56974a6f JJ |
954 | */ |
955 | static int apparmor_socket_listen(struct socket *sock, int backlog) | |
956 | { | |
957 | AA_BUG(!sock); | |
958 | AA_BUG(!sock->sk); | |
959 | AA_BUG(in_interrupt()); | |
960 | ||
961 | return af_select(sock->sk->sk_family, | |
962 | listen_perm(sock, backlog), | |
963 | aa_sk_perm(OP_LISTEN, AA_MAY_LISTEN, sock->sk)); | |
964 | } | |
965 | ||
966 | /** | |
967 | * apparmor_socket_accept - check perms before accepting a new connection. | |
968 | * | |
969 | * Note: while @newsock is created and has some information, the accept | |
970 | * has not been done. | |
971 | */ | |
972 | static int apparmor_socket_accept(struct socket *sock, struct socket *newsock) | |
973 | { | |
974 | AA_BUG(!sock); | |
975 | AA_BUG(!sock->sk); | |
976 | AA_BUG(!newsock); | |
977 | AA_BUG(in_interrupt()); | |
978 | ||
979 | return af_select(sock->sk->sk_family, | |
980 | accept_perm(sock, newsock), | |
981 | aa_sk_perm(OP_ACCEPT, AA_MAY_ACCEPT, sock->sk)); | |
982 | } | |
983 | ||
984 | static int aa_sock_msg_perm(const char *op, u32 request, struct socket *sock, | |
985 | struct msghdr *msg, int size) | |
986 | { | |
987 | AA_BUG(!sock); | |
988 | AA_BUG(!sock->sk); | |
989 | AA_BUG(!msg); | |
990 | AA_BUG(in_interrupt()); | |
991 | ||
992 | return af_select(sock->sk->sk_family, | |
993 | msg_perm(op, request, sock, msg, size), | |
994 | aa_sk_perm(op, request, sock->sk)); | |
995 | } | |
996 | ||
997 | /** | |
998 | * apparmor_socket_sendmsg - check perms before sending msg to another socket | |
999 | */ | |
1000 | static int apparmor_socket_sendmsg(struct socket *sock, | |
1001 | struct msghdr *msg, int size) | |
1002 | { | |
1003 | return aa_sock_msg_perm(OP_SENDMSG, AA_MAY_SEND, sock, msg, size); | |
1004 | } | |
1005 | ||
1006 | /** | |
1007 | * apparmor_socket_recvmsg - check perms before receiving a message | |
1008 | */ | |
1009 | static int apparmor_socket_recvmsg(struct socket *sock, | |
1010 | struct msghdr *msg, int size, int flags) | |
1011 | { | |
1012 | return aa_sock_msg_perm(OP_RECVMSG, AA_MAY_RECEIVE, sock, msg, size); | |
1013 | } | |
1014 | ||
1015 | /* revaliation, get/set attr, shutdown */ | |
1016 | static int aa_sock_perm(const char *op, u32 request, struct socket *sock) | |
1017 | { | |
1018 | AA_BUG(!sock); | |
1019 | AA_BUG(!sock->sk); | |
1020 | AA_BUG(in_interrupt()); | |
1021 | ||
1022 | return af_select(sock->sk->sk_family, | |
1023 | sock_perm(op, request, sock), | |
1024 | aa_sk_perm(op, request, sock->sk)); | |
1025 | } | |
1026 | ||
1027 | /** | |
1028 | * apparmor_socket_getsockname - check perms before getting the local address | |
1029 | */ | |
1030 | static int apparmor_socket_getsockname(struct socket *sock) | |
1031 | { | |
1032 | return aa_sock_perm(OP_GETSOCKNAME, AA_MAY_GETATTR, sock); | |
1033 | } | |
1034 | ||
1035 | /** | |
1036 | * apparmor_socket_getpeername - check perms before getting remote address | |
1037 | */ | |
1038 | static int apparmor_socket_getpeername(struct socket *sock) | |
1039 | { | |
1040 | return aa_sock_perm(OP_GETPEERNAME, AA_MAY_GETATTR, sock); | |
1041 | } | |
1042 | ||
1043 | /* revaliation, get/set attr, opt */ | |
1044 | static int aa_sock_opt_perm(const char *op, u32 request, struct socket *sock, | |
1045 | int level, int optname) | |
1046 | { | |
1047 | AA_BUG(!sock); | |
1048 | AA_BUG(!sock->sk); | |
1049 | AA_BUG(in_interrupt()); | |
1050 | ||
1051 | return af_select(sock->sk->sk_family, | |
1052 | opt_perm(op, request, sock, level, optname), | |
1053 | aa_sk_perm(op, request, sock->sk)); | |
1054 | } | |
1055 | ||
1056 | /** | |
0fc6ab40 | 1057 | * apparmor_socket_getsockopt - check perms before getting socket options |
56974a6f JJ |
1058 | */ |
1059 | static int apparmor_socket_getsockopt(struct socket *sock, int level, | |
1060 | int optname) | |
1061 | { | |
1062 | return aa_sock_opt_perm(OP_GETSOCKOPT, AA_MAY_GETOPT, sock, | |
1063 | level, optname); | |
1064 | } | |
1065 | ||
1066 | /** | |
0fc6ab40 | 1067 | * apparmor_socket_setsockopt - check perms before setting socket options |
56974a6f JJ |
1068 | */ |
1069 | static int apparmor_socket_setsockopt(struct socket *sock, int level, | |
1070 | int optname) | |
1071 | { | |
1072 | return aa_sock_opt_perm(OP_SETSOCKOPT, AA_MAY_SETOPT, sock, | |
1073 | level, optname); | |
1074 | } | |
1075 | ||
1076 | /** | |
1077 | * apparmor_socket_shutdown - check perms before shutting down @sock conn | |
1078 | */ | |
1079 | static int apparmor_socket_shutdown(struct socket *sock, int how) | |
1080 | { | |
1081 | return aa_sock_perm(OP_SHUTDOWN, AA_MAY_SHUTDOWN, sock); | |
1082 | } | |
1083 | ||
e1af4779 | 1084 | #ifdef CONFIG_NETWORK_SECMARK |
56974a6f | 1085 | /** |
0fc6ab40 | 1086 | * apparmor_socket_sock_rcv_skb - check perms before associating skb to sk |
56974a6f JJ |
1087 | * |
1088 | * Note: can not sleep may be called with locks held | |
1089 | * | |
1090 | * dont want protocol specific in __skb_recv_datagram() | |
1091 | * to deny an incoming connection socket_sock_rcv_skb() | |
1092 | */ | |
1093 | static int apparmor_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb) | |
1094 | { | |
ab9f2115 MG |
1095 | struct aa_sk_ctx *ctx = SK_CTX(sk); |
1096 | ||
1097 | if (!skb->secmark) | |
1098 | return 0; | |
1099 | ||
1100 | return apparmor_secmark_check(ctx->label, OP_RECVMSG, AA_MAY_RECEIVE, | |
1101 | skb->secmark, sk); | |
56974a6f | 1102 | } |
e1af4779 | 1103 | #endif |
56974a6f JJ |
1104 | |
1105 | ||
1106 | static struct aa_label *sk_peer_label(struct sock *sk) | |
1107 | { | |
1108 | struct aa_sk_ctx *ctx = SK_CTX(sk); | |
1109 | ||
1110 | if (ctx->peer) | |
1111 | return ctx->peer; | |
1112 | ||
1113 | return ERR_PTR(-ENOPROTOOPT); | |
1114 | } | |
1115 | ||
1116 | /** | |
1117 | * apparmor_socket_getpeersec_stream - get security context of peer | |
1118 | * | |
1119 | * Note: for tcp only valid if using ipsec or cipso on lan | |
1120 | */ | |
1121 | static int apparmor_socket_getpeersec_stream(struct socket *sock, | |
b10b9c34 | 1122 | sockptr_t optval, sockptr_t optlen, |
56974a6f JJ |
1123 | unsigned int len) |
1124 | { | |
b10b9c34 | 1125 | char *name = NULL; |
56974a6f JJ |
1126 | int slen, error = 0; |
1127 | struct aa_label *label; | |
1128 | struct aa_label *peer; | |
1129 | ||
1130 | label = begin_current_label_crit_section(); | |
1131 | peer = sk_peer_label(sock->sk); | |
1132 | if (IS_ERR(peer)) { | |
1133 | error = PTR_ERR(peer); | |
1134 | goto done; | |
1135 | } | |
1136 | slen = aa_label_asxprint(&name, labels_ns(label), peer, | |
1137 | FLAG_SHOW_MODE | FLAG_VIEW_SUBNS | | |
1138 | FLAG_HIDDEN_UNCONFINED, GFP_KERNEL); | |
1139 | /* don't include terminating \0 in slen, it breaks some apps */ | |
1140 | if (slen < 0) { | |
1141 | error = -ENOMEM; | |
b10b9c34 PM |
1142 | goto done; |
1143 | } | |
1144 | if (slen > len) { | |
1145 | error = -ERANGE; | |
1146 | goto done_len; | |
56974a6f JJ |
1147 | } |
1148 | ||
b10b9c34 PM |
1149 | if (copy_to_sockptr(optval, name, slen)) |
1150 | error = -EFAULT; | |
1151 | done_len: | |
1152 | if (copy_to_sockptr(optlen, &slen, sizeof(slen))) | |
1153 | error = -EFAULT; | |
56974a6f JJ |
1154 | done: |
1155 | end_current_label_crit_section(label); | |
b10b9c34 | 1156 | kfree(name); |
56974a6f JJ |
1157 | return error; |
1158 | } | |
1159 | ||
1160 | /** | |
1161 | * apparmor_socket_getpeersec_dgram - get security label of packet | |
1162 | * @sock: the peer socket | |
1163 | * @skb: packet data | |
1164 | * @secid: pointer to where to put the secid of the packet | |
1165 | * | |
1166 | * Sets the netlabel socket state on sk from parent | |
1167 | */ | |
1168 | static int apparmor_socket_getpeersec_dgram(struct socket *sock, | |
1169 | struct sk_buff *skb, u32 *secid) | |
1170 | ||
1171 | { | |
1172 | /* TODO: requires secid support */ | |
1173 | return -ENOPROTOOPT; | |
1174 | } | |
1175 | ||
1176 | /** | |
1177 | * apparmor_sock_graft - Initialize newly created socket | |
1178 | * @sk: child sock | |
1179 | * @parent: parent socket | |
1180 | * | |
1181 | * Note: could set off of SOCK_CTX(parent) but need to track inode and we can | |
1182 | * just set sk security information off of current creating process label | |
1183 | * Labeling of sk for accept case - probably should be sock based | |
1184 | * instead of task, because of the case where an implicitly labeled | |
1185 | * socket is shared by different tasks. | |
1186 | */ | |
1187 | static void apparmor_sock_graft(struct sock *sk, struct socket *parent) | |
1188 | { | |
1189 | struct aa_sk_ctx *ctx = SK_CTX(sk); | |
1190 | ||
1191 | if (!ctx->label) | |
1192 | ctx->label = aa_get_current_label(); | |
1193 | } | |
1194 | ||
e1af4779 | 1195 | #ifdef CONFIG_NETWORK_SECMARK |
41dd9596 | 1196 | static int apparmor_inet_conn_request(const struct sock *sk, struct sk_buff *skb, |
ab9f2115 MG |
1197 | struct request_sock *req) |
1198 | { | |
1199 | struct aa_sk_ctx *ctx = SK_CTX(sk); | |
1200 | ||
1201 | if (!skb->secmark) | |
1202 | return 0; | |
1203 | ||
1204 | return apparmor_secmark_check(ctx->label, OP_CONNECT, AA_MAY_CONNECT, | |
1205 | skb->secmark, sk); | |
1206 | } | |
e1af4779 | 1207 | #endif |
ab9f2115 | 1208 | |
bbd3662a | 1209 | /* |
37923d43 | 1210 | * The cred blob is a pointer to, not an instance of, an aa_label. |
bbd3662a | 1211 | */ |
f22f9aaf | 1212 | struct lsm_blob_sizes apparmor_blob_sizes __ro_after_init = { |
37923d43 | 1213 | .lbs_cred = sizeof(struct aa_label *), |
33bf60ca | 1214 | .lbs_file = sizeof(struct aa_file_ctx), |
f4ad8f2c | 1215 | .lbs_task = sizeof(struct aa_task_ctx), |
bbd3662a CS |
1216 | }; |
1217 | ||
f22f9aaf | 1218 | static struct security_hook_list apparmor_hooks[] __ro_after_init = { |
e20b043a CS |
1219 | LSM_HOOK_INIT(ptrace_access_check, apparmor_ptrace_access_check), |
1220 | LSM_HOOK_INIT(ptrace_traceme, apparmor_ptrace_traceme), | |
1221 | LSM_HOOK_INIT(capget, apparmor_capget), | |
1222 | LSM_HOOK_INIT(capable, apparmor_capable), | |
1223 | ||
2ea3ffb7 JJ |
1224 | LSM_HOOK_INIT(sb_mount, apparmor_sb_mount), |
1225 | LSM_HOOK_INIT(sb_umount, apparmor_sb_umount), | |
1226 | LSM_HOOK_INIT(sb_pivotroot, apparmor_sb_pivotroot), | |
1227 | ||
e20b043a CS |
1228 | LSM_HOOK_INIT(path_link, apparmor_path_link), |
1229 | LSM_HOOK_INIT(path_unlink, apparmor_path_unlink), | |
1230 | LSM_HOOK_INIT(path_symlink, apparmor_path_symlink), | |
1231 | LSM_HOOK_INIT(path_mkdir, apparmor_path_mkdir), | |
1232 | LSM_HOOK_INIT(path_rmdir, apparmor_path_rmdir), | |
1233 | LSM_HOOK_INIT(path_mknod, apparmor_path_mknod), | |
1234 | LSM_HOOK_INIT(path_rename, apparmor_path_rename), | |
1235 | LSM_HOOK_INIT(path_chmod, apparmor_path_chmod), | |
1236 | LSM_HOOK_INIT(path_chown, apparmor_path_chown), | |
1237 | LSM_HOOK_INIT(path_truncate, apparmor_path_truncate), | |
1238 | LSM_HOOK_INIT(inode_getattr, apparmor_inode_getattr), | |
1239 | ||
1240 | LSM_HOOK_INIT(file_open, apparmor_file_open), | |
064dc947 | 1241 | LSM_HOOK_INIT(file_receive, apparmor_file_receive), |
e20b043a CS |
1242 | LSM_HOOK_INIT(file_permission, apparmor_file_permission), |
1243 | LSM_HOOK_INIT(file_alloc_security, apparmor_file_alloc_security), | |
1244 | LSM_HOOK_INIT(file_free_security, apparmor_file_free_security), | |
1245 | LSM_HOOK_INIT(mmap_file, apparmor_mmap_file), | |
e20b043a CS |
1246 | LSM_HOOK_INIT(file_mprotect, apparmor_file_mprotect), |
1247 | LSM_HOOK_INIT(file_lock, apparmor_file_lock), | |
3350607d | 1248 | LSM_HOOK_INIT(file_truncate, apparmor_file_truncate), |
e20b043a CS |
1249 | |
1250 | LSM_HOOK_INIT(getprocattr, apparmor_getprocattr), | |
1251 | LSM_HOOK_INIT(setprocattr, apparmor_setprocattr), | |
1252 | ||
56974a6f JJ |
1253 | LSM_HOOK_INIT(sk_alloc_security, apparmor_sk_alloc_security), |
1254 | LSM_HOOK_INIT(sk_free_security, apparmor_sk_free_security), | |
1255 | LSM_HOOK_INIT(sk_clone_security, apparmor_sk_clone_security), | |
1256 | ||
1257 | LSM_HOOK_INIT(socket_create, apparmor_socket_create), | |
1258 | LSM_HOOK_INIT(socket_post_create, apparmor_socket_post_create), | |
1259 | LSM_HOOK_INIT(socket_bind, apparmor_socket_bind), | |
1260 | LSM_HOOK_INIT(socket_connect, apparmor_socket_connect), | |
1261 | LSM_HOOK_INIT(socket_listen, apparmor_socket_listen), | |
1262 | LSM_HOOK_INIT(socket_accept, apparmor_socket_accept), | |
1263 | LSM_HOOK_INIT(socket_sendmsg, apparmor_socket_sendmsg), | |
1264 | LSM_HOOK_INIT(socket_recvmsg, apparmor_socket_recvmsg), | |
1265 | LSM_HOOK_INIT(socket_getsockname, apparmor_socket_getsockname), | |
1266 | LSM_HOOK_INIT(socket_getpeername, apparmor_socket_getpeername), | |
1267 | LSM_HOOK_INIT(socket_getsockopt, apparmor_socket_getsockopt), | |
1268 | LSM_HOOK_INIT(socket_setsockopt, apparmor_socket_setsockopt), | |
1269 | LSM_HOOK_INIT(socket_shutdown, apparmor_socket_shutdown), | |
e1af4779 | 1270 | #ifdef CONFIG_NETWORK_SECMARK |
56974a6f | 1271 | LSM_HOOK_INIT(socket_sock_rcv_skb, apparmor_socket_sock_rcv_skb), |
e1af4779 | 1272 | #endif |
56974a6f JJ |
1273 | LSM_HOOK_INIT(socket_getpeersec_stream, |
1274 | apparmor_socket_getpeersec_stream), | |
1275 | LSM_HOOK_INIT(socket_getpeersec_dgram, | |
1276 | apparmor_socket_getpeersec_dgram), | |
1277 | LSM_HOOK_INIT(sock_graft, apparmor_sock_graft), | |
e1af4779 | 1278 | #ifdef CONFIG_NETWORK_SECMARK |
ab9f2115 | 1279 | LSM_HOOK_INIT(inet_conn_request, apparmor_inet_conn_request), |
e1af4779 | 1280 | #endif |
56974a6f | 1281 | |
e20b043a CS |
1282 | LSM_HOOK_INIT(cred_alloc_blank, apparmor_cred_alloc_blank), |
1283 | LSM_HOOK_INIT(cred_free, apparmor_cred_free), | |
1284 | LSM_HOOK_INIT(cred_prepare, apparmor_cred_prepare), | |
1285 | LSM_HOOK_INIT(cred_transfer, apparmor_cred_transfer), | |
1286 | ||
b8bff599 | 1287 | LSM_HOOK_INIT(bprm_creds_for_exec, apparmor_bprm_creds_for_exec), |
e20b043a CS |
1288 | LSM_HOOK_INIT(bprm_committing_creds, apparmor_bprm_committing_creds), |
1289 | LSM_HOOK_INIT(bprm_committed_creds, apparmor_bprm_committed_creds), | |
e20b043a | 1290 | |
3b529a76 JJ |
1291 | LSM_HOOK_INIT(task_free, apparmor_task_free), |
1292 | LSM_HOOK_INIT(task_alloc, apparmor_task_alloc), | |
6326948f PM |
1293 | LSM_HOOK_INIT(current_getsecid_subj, apparmor_current_getsecid_subj), |
1294 | LSM_HOOK_INIT(task_getsecid_obj, apparmor_task_getsecid_obj), | |
e20b043a | 1295 | LSM_HOOK_INIT(task_setrlimit, apparmor_task_setrlimit), |
cd1dbf76 | 1296 | LSM_HOOK_INIT(task_kill, apparmor_task_kill), |
c0929212 | 1297 | |
e79c26d0 MG |
1298 | #ifdef CONFIG_AUDIT |
1299 | LSM_HOOK_INIT(audit_rule_init, aa_audit_rule_init), | |
1300 | LSM_HOOK_INIT(audit_rule_known, aa_audit_rule_known), | |
1301 | LSM_HOOK_INIT(audit_rule_match, aa_audit_rule_match), | |
1302 | LSM_HOOK_INIT(audit_rule_free, aa_audit_rule_free), | |
1303 | #endif | |
1304 | ||
c0929212 JJ |
1305 | LSM_HOOK_INIT(secid_to_secctx, apparmor_secid_to_secctx), |
1306 | LSM_HOOK_INIT(secctx_to_secid, apparmor_secctx_to_secid), | |
1307 | LSM_HOOK_INIT(release_secctx, apparmor_release_secctx), | |
b5e95b48 JJ |
1308 | }; |
1309 | ||
1310 | /* | |
1311 | * AppArmor sysfs module parameters | |
1312 | */ | |
1313 | ||
101d6c82 SR |
1314 | static int param_set_aabool(const char *val, const struct kernel_param *kp); |
1315 | static int param_get_aabool(char *buffer, const struct kernel_param *kp); | |
b8aa09fd | 1316 | #define param_check_aabool param_check_bool |
9c27847d | 1317 | static const struct kernel_param_ops param_ops_aabool = { |
6a4c2643 | 1318 | .flags = KERNEL_PARAM_OPS_FL_NOARG, |
101d6c82 SR |
1319 | .set = param_set_aabool, |
1320 | .get = param_get_aabool | |
1321 | }; | |
b5e95b48 | 1322 | |
101d6c82 SR |
1323 | static int param_set_aauint(const char *val, const struct kernel_param *kp); |
1324 | static int param_get_aauint(char *buffer, const struct kernel_param *kp); | |
b8aa09fd | 1325 | #define param_check_aauint param_check_uint |
9c27847d | 1326 | static const struct kernel_param_ops param_ops_aauint = { |
101d6c82 SR |
1327 | .set = param_set_aauint, |
1328 | .get = param_get_aauint | |
1329 | }; | |
b5e95b48 | 1330 | |
63c16c3a CC |
1331 | static int param_set_aacompressionlevel(const char *val, |
1332 | const struct kernel_param *kp); | |
1333 | static int param_get_aacompressionlevel(char *buffer, | |
1334 | const struct kernel_param *kp); | |
1335 | #define param_check_aacompressionlevel param_check_int | |
1336 | static const struct kernel_param_ops param_ops_aacompressionlevel = { | |
1337 | .set = param_set_aacompressionlevel, | |
1338 | .get = param_get_aacompressionlevel | |
1339 | }; | |
1340 | ||
101d6c82 SR |
1341 | static int param_set_aalockpolicy(const char *val, const struct kernel_param *kp); |
1342 | static int param_get_aalockpolicy(char *buffer, const struct kernel_param *kp); | |
b8aa09fd | 1343 | #define param_check_aalockpolicy param_check_bool |
9c27847d | 1344 | static const struct kernel_param_ops param_ops_aalockpolicy = { |
6a4c2643 | 1345 | .flags = KERNEL_PARAM_OPS_FL_NOARG, |
101d6c82 SR |
1346 | .set = param_set_aalockpolicy, |
1347 | .get = param_get_aalockpolicy | |
1348 | }; | |
b5e95b48 | 1349 | |
e4dca7b7 KC |
1350 | static int param_set_audit(const char *val, const struct kernel_param *kp); |
1351 | static int param_get_audit(char *buffer, const struct kernel_param *kp); | |
b5e95b48 | 1352 | |
e4dca7b7 KC |
1353 | static int param_set_mode(const char *val, const struct kernel_param *kp); |
1354 | static int param_get_mode(char *buffer, const struct kernel_param *kp); | |
b5e95b48 JJ |
1355 | |
1356 | /* Flag values, also controllable via /sys/module/apparmor/parameters | |
1357 | * We define special types as we want to do additional mediation. | |
1358 | */ | |
1359 | ||
1360 | /* AppArmor global enforcement switch - complain, enforce, kill */ | |
1361 | enum profile_mode aa_g_profile_mode = APPARMOR_ENFORCE; | |
1362 | module_param_call(mode, param_set_mode, param_get_mode, | |
1363 | &aa_g_profile_mode, S_IRUSR | S_IWUSR); | |
1364 | ||
6059f71f | 1365 | /* whether policy verification hashing is enabled */ |
7616ac70 | 1366 | bool aa_g_hash_policy = IS_ENABLED(CONFIG_SECURITY_APPARMOR_HASH_DEFAULT); |
3ccb76c5 | 1367 | #ifdef CONFIG_SECURITY_APPARMOR_HASH |
6059f71f | 1368 | module_param_named(hash_policy, aa_g_hash_policy, aabool, S_IRUSR | S_IWUSR); |
7616ac70 | 1369 | #endif |
6059f71f | 1370 | |
d61c57fd JJ |
1371 | /* whether policy exactly as loaded is retained for debug and checkpointing */ |
1372 | bool aa_g_export_binary = IS_ENABLED(CONFIG_SECURITY_APPARMOR_EXPORT_BINARY); | |
1373 | #ifdef CONFIG_SECURITY_APPARMOR_EXPORT_BINARY | |
1374 | module_param_named(export_binary, aa_g_export_binary, aabool, 0600); | |
1375 | #endif | |
1376 | ||
63c16c3a | 1377 | /* policy loaddata compression level */ |
70f24a9f | 1378 | int aa_g_rawdata_compression_level = AA_DEFAULT_CLEVEL; |
63c16c3a CC |
1379 | module_param_named(rawdata_compression_level, aa_g_rawdata_compression_level, |
1380 | aacompressionlevel, 0400); | |
1381 | ||
b5e95b48 | 1382 | /* Debug mode */ |
eea7a05f | 1383 | bool aa_g_debug = IS_ENABLED(CONFIG_SECURITY_APPARMOR_DEBUG_MESSAGES); |
b5e95b48 JJ |
1384 | module_param_named(debug, aa_g_debug, aabool, S_IRUSR | S_IWUSR); |
1385 | ||
1386 | /* Audit mode */ | |
1387 | enum audit_mode aa_g_audit; | |
1388 | module_param_call(audit, param_set_audit, param_get_audit, | |
1389 | &aa_g_audit, S_IRUSR | S_IWUSR); | |
1390 | ||
1391 | /* Determines if audit header is included in audited messages. This | |
1392 | * provides more context if the audit daemon is not running | |
1393 | */ | |
954317fe | 1394 | bool aa_g_audit_header = true; |
b5e95b48 JJ |
1395 | module_param_named(audit_header, aa_g_audit_header, aabool, |
1396 | S_IRUSR | S_IWUSR); | |
1397 | ||
1398 | /* lock out loading/removal of policy | |
1399 | * TODO: add in at boot loading of policy, which is the only way to | |
1400 | * load policy, if lock_policy is set | |
1401 | */ | |
90ab5ee9 | 1402 | bool aa_g_lock_policy; |
b5e95b48 JJ |
1403 | module_param_named(lock_policy, aa_g_lock_policy, aalockpolicy, |
1404 | S_IRUSR | S_IWUSR); | |
1405 | ||
1406 | /* Syscall logging mode */ | |
90ab5ee9 | 1407 | bool aa_g_logsyscall; |
b5e95b48 JJ |
1408 | module_param_named(logsyscall, aa_g_logsyscall, aabool, S_IRUSR | S_IWUSR); |
1409 | ||
1410 | /* Maximum pathname length before accesses will start getting rejected */ | |
1411 | unsigned int aa_g_path_max = 2 * PATH_MAX; | |
622f6e32 | 1412 | module_param_named(path_max, aa_g_path_max, aauint, S_IRUSR); |
b5e95b48 JJ |
1413 | |
1414 | /* Determines how paranoid loading of policy is and how much verification | |
1415 | * on the loaded policy is done. | |
abbf8734 JJ |
1416 | * DEPRECATED: read only as strict checking of load is always done now |
1417 | * that none root users (user namespaces) can load policy. | |
b5e95b48 | 1418 | */ |
79eb2711 | 1419 | bool aa_g_paranoid_load = IS_ENABLED(CONFIG_SECURITY_APPARMOR_PARANOID_LOAD); |
abbf8734 | 1420 | module_param_named(paranoid_load, aa_g_paranoid_load, aabool, S_IRUGO); |
b5e95b48 | 1421 | |
e33c1b99 KC |
1422 | static int param_get_aaintbool(char *buffer, const struct kernel_param *kp); |
1423 | static int param_set_aaintbool(const char *val, const struct kernel_param *kp); | |
1424 | #define param_check_aaintbool param_check_int | |
1425 | static const struct kernel_param_ops param_ops_aaintbool = { | |
1426 | .set = param_set_aaintbool, | |
1427 | .get = param_get_aaintbool | |
1428 | }; | |
b5e95b48 | 1429 | /* Boot time disable flag */ |
f22f9aaf | 1430 | static int apparmor_enabled __ro_after_init = 1; |
e33c1b99 | 1431 | module_param_named(enabled, apparmor_enabled, aaintbool, 0444); |
b5e95b48 JJ |
1432 | |
1433 | static int __init apparmor_enabled_setup(char *str) | |
1434 | { | |
1435 | unsigned long enabled; | |
29707b20 | 1436 | int error = kstrtoul(str, 0, &enabled); |
b5e95b48 JJ |
1437 | if (!error) |
1438 | apparmor_enabled = enabled ? 1 : 0; | |
1439 | return 1; | |
1440 | } | |
1441 | ||
1442 | __setup("apparmor=", apparmor_enabled_setup); | |
1443 | ||
1444 | /* set global flag turning off the ability to load policy */ | |
101d6c82 | 1445 | static int param_set_aalockpolicy(const char *val, const struct kernel_param *kp) |
b5e95b48 | 1446 | { |
545de8fe JJ |
1447 | if (!apparmor_enabled) |
1448 | return -EINVAL; | |
92de220a | 1449 | if (apparmor_initialized && !aa_current_policy_admin_capable(NULL)) |
b5e95b48 | 1450 | return -EPERM; |
b5e95b48 JJ |
1451 | return param_set_bool(val, kp); |
1452 | } | |
1453 | ||
101d6c82 | 1454 | static int param_get_aalockpolicy(char *buffer, const struct kernel_param *kp) |
b5e95b48 | 1455 | { |
ca4bd5ae JJ |
1456 | if (!apparmor_enabled) |
1457 | return -EINVAL; | |
92de220a | 1458 | if (apparmor_initialized && !aa_current_policy_view_capable(NULL)) |
545de8fe | 1459 | return -EPERM; |
b5e95b48 JJ |
1460 | return param_get_bool(buffer, kp); |
1461 | } | |
1462 | ||
101d6c82 | 1463 | static int param_set_aabool(const char *val, const struct kernel_param *kp) |
b5e95b48 | 1464 | { |
ca4bd5ae JJ |
1465 | if (!apparmor_enabled) |
1466 | return -EINVAL; | |
92de220a | 1467 | if (apparmor_initialized && !aa_current_policy_admin_capable(NULL)) |
545de8fe | 1468 | return -EPERM; |
b5e95b48 JJ |
1469 | return param_set_bool(val, kp); |
1470 | } | |
1471 | ||
101d6c82 | 1472 | static int param_get_aabool(char *buffer, const struct kernel_param *kp) |
b5e95b48 | 1473 | { |
ca4bd5ae JJ |
1474 | if (!apparmor_enabled) |
1475 | return -EINVAL; | |
92de220a | 1476 | if (apparmor_initialized && !aa_current_policy_view_capable(NULL)) |
545de8fe | 1477 | return -EPERM; |
b5e95b48 JJ |
1478 | return param_get_bool(buffer, kp); |
1479 | } | |
1480 | ||
101d6c82 | 1481 | static int param_set_aauint(const char *val, const struct kernel_param *kp) |
b5e95b48 | 1482 | { |
39d84824 JJ |
1483 | int error; |
1484 | ||
ca4bd5ae JJ |
1485 | if (!apparmor_enabled) |
1486 | return -EINVAL; | |
39d84824 JJ |
1487 | /* file is ro but enforce 2nd line check */ |
1488 | if (apparmor_initialized) | |
545de8fe | 1489 | return -EPERM; |
39d84824 JJ |
1490 | |
1491 | error = param_set_uint(val, kp); | |
df323337 | 1492 | aa_g_path_max = max_t(uint32_t, aa_g_path_max, sizeof(union aa_buffer)); |
39d84824 JJ |
1493 | pr_info("AppArmor: buffer size set to %d bytes\n", aa_g_path_max); |
1494 | ||
1495 | return error; | |
b5e95b48 JJ |
1496 | } |
1497 | ||
101d6c82 | 1498 | static int param_get_aauint(char *buffer, const struct kernel_param *kp) |
b5e95b48 | 1499 | { |
ca4bd5ae JJ |
1500 | if (!apparmor_enabled) |
1501 | return -EINVAL; | |
92de220a | 1502 | if (apparmor_initialized && !aa_current_policy_view_capable(NULL)) |
545de8fe | 1503 | return -EPERM; |
b5e95b48 JJ |
1504 | return param_get_uint(buffer, kp); |
1505 | } | |
1506 | ||
e33c1b99 KC |
1507 | /* Can only be set before AppArmor is initialized (i.e. on boot cmdline). */ |
1508 | static int param_set_aaintbool(const char *val, const struct kernel_param *kp) | |
1509 | { | |
1510 | struct kernel_param kp_local; | |
1511 | bool value; | |
1512 | int error; | |
1513 | ||
1514 | if (apparmor_initialized) | |
1515 | return -EPERM; | |
1516 | ||
1517 | /* Create local copy, with arg pointing to bool type. */ | |
1518 | value = !!*((int *)kp->arg); | |
1519 | memcpy(&kp_local, kp, sizeof(kp_local)); | |
1520 | kp_local.arg = &value; | |
1521 | ||
1522 | error = param_set_bool(val, &kp_local); | |
1523 | if (!error) | |
1524 | *((int *)kp->arg) = *((bool *)kp_local.arg); | |
1525 | return error; | |
1526 | } | |
1527 | ||
1528 | /* | |
1529 | * To avoid changing /sys/module/apparmor/parameters/enabled from Y/N to | |
1530 | * 1/0, this converts the "int that is actually bool" back to bool for | |
1531 | * display in the /sys filesystem, while keeping it "int" for the LSM | |
1532 | * infrastructure. | |
1533 | */ | |
1534 | static int param_get_aaintbool(char *buffer, const struct kernel_param *kp) | |
1535 | { | |
1536 | struct kernel_param kp_local; | |
1537 | bool value; | |
1538 | ||
1539 | /* Create local copy, with arg pointing to bool type. */ | |
1540 | value = !!*((int *)kp->arg); | |
1541 | memcpy(&kp_local, kp, sizeof(kp_local)); | |
1542 | kp_local.arg = &value; | |
1543 | ||
1544 | return param_get_bool(buffer, &kp_local); | |
1545 | } | |
1546 | ||
63c16c3a CC |
1547 | static int param_set_aacompressionlevel(const char *val, |
1548 | const struct kernel_param *kp) | |
1549 | { | |
1550 | int error; | |
1551 | ||
1552 | if (!apparmor_enabled) | |
1553 | return -EINVAL; | |
1554 | if (apparmor_initialized) | |
1555 | return -EPERM; | |
1556 | ||
1557 | error = param_set_int(val, kp); | |
1558 | ||
1559 | aa_g_rawdata_compression_level = clamp(aa_g_rawdata_compression_level, | |
70f24a9f | 1560 | AA_MIN_CLEVEL, AA_MAX_CLEVEL); |
f4d6b94b | 1561 | pr_info("AppArmor: policy rawdata compression level set to %d\n", |
63c16c3a CC |
1562 | aa_g_rawdata_compression_level); |
1563 | ||
1564 | return error; | |
1565 | } | |
1566 | ||
1567 | static int param_get_aacompressionlevel(char *buffer, | |
1568 | const struct kernel_param *kp) | |
1569 | { | |
1570 | if (!apparmor_enabled) | |
1571 | return -EINVAL; | |
92de220a | 1572 | if (apparmor_initialized && !aa_current_policy_view_capable(NULL)) |
63c16c3a CC |
1573 | return -EPERM; |
1574 | return param_get_int(buffer, kp); | |
1575 | } | |
1576 | ||
e4dca7b7 | 1577 | static int param_get_audit(char *buffer, const struct kernel_param *kp) |
b5e95b48 | 1578 | { |
b5e95b48 JJ |
1579 | if (!apparmor_enabled) |
1580 | return -EINVAL; | |
92de220a | 1581 | if (apparmor_initialized && !aa_current_policy_view_capable(NULL)) |
545de8fe | 1582 | return -EPERM; |
b5e95b48 JJ |
1583 | return sprintf(buffer, "%s", audit_mode_names[aa_g_audit]); |
1584 | } | |
1585 | ||
e4dca7b7 | 1586 | static int param_set_audit(const char *val, const struct kernel_param *kp) |
b5e95b48 JJ |
1587 | { |
1588 | int i; | |
b5e95b48 JJ |
1589 | |
1590 | if (!apparmor_enabled) | |
1591 | return -EINVAL; | |
b5e95b48 JJ |
1592 | if (!val) |
1593 | return -EINVAL; | |
92de220a | 1594 | if (apparmor_initialized && !aa_current_policy_admin_capable(NULL)) |
545de8fe | 1595 | return -EPERM; |
b5e95b48 | 1596 | |
5d8779a5 AS |
1597 | i = match_string(audit_mode_names, AUDIT_MAX_INDEX, val); |
1598 | if (i < 0) | |
1599 | return -EINVAL; | |
b5e95b48 | 1600 | |
5d8779a5 AS |
1601 | aa_g_audit = i; |
1602 | return 0; | |
b5e95b48 JJ |
1603 | } |
1604 | ||
e4dca7b7 | 1605 | static int param_get_mode(char *buffer, const struct kernel_param *kp) |
b5e95b48 | 1606 | { |
b5e95b48 JJ |
1607 | if (!apparmor_enabled) |
1608 | return -EINVAL; | |
92de220a | 1609 | if (apparmor_initialized && !aa_current_policy_view_capable(NULL)) |
545de8fe | 1610 | return -EPERM; |
b5e95b48 | 1611 | |
0d259f04 | 1612 | return sprintf(buffer, "%s", aa_profile_mode_names[aa_g_profile_mode]); |
b5e95b48 JJ |
1613 | } |
1614 | ||
e4dca7b7 | 1615 | static int param_set_mode(const char *val, const struct kernel_param *kp) |
b5e95b48 JJ |
1616 | { |
1617 | int i; | |
b5e95b48 JJ |
1618 | |
1619 | if (!apparmor_enabled) | |
1620 | return -EINVAL; | |
b5e95b48 JJ |
1621 | if (!val) |
1622 | return -EINVAL; | |
92de220a | 1623 | if (apparmor_initialized && !aa_current_policy_admin_capable(NULL)) |
545de8fe | 1624 | return -EPERM; |
b5e95b48 | 1625 | |
5d8779a5 AS |
1626 | i = match_string(aa_profile_mode_names, APPARMOR_MODE_NAMES_MAX_INDEX, |
1627 | val); | |
1628 | if (i < 0) | |
1629 | return -EINVAL; | |
b5e95b48 | 1630 | |
5d8779a5 AS |
1631 | aa_g_profile_mode = i; |
1632 | return 0; | |
b5e95b48 JJ |
1633 | } |
1634 | ||
341c1fda | 1635 | char *aa_get_buffer(bool in_atomic) |
df323337 SAS |
1636 | { |
1637 | union aa_buffer *aa_buf; | |
1638 | bool try_again = true; | |
341c1fda | 1639 | gfp_t flags = (GFP_KERNEL | __GFP_RETRY_MAYFAIL | __GFP_NOWARN); |
df323337 SAS |
1640 | |
1641 | retry: | |
1642 | spin_lock(&aa_buffers_lock); | |
341c1fda JJ |
1643 | if (buffer_count > reserve_count || |
1644 | (in_atomic && !list_empty(&aa_global_buffers))) { | |
df323337 SAS |
1645 | aa_buf = list_first_entry(&aa_global_buffers, union aa_buffer, |
1646 | list); | |
1647 | list_del(&aa_buf->list); | |
341c1fda | 1648 | buffer_count--; |
df323337 SAS |
1649 | spin_unlock(&aa_buffers_lock); |
1650 | return &aa_buf->buffer[0]; | |
1651 | } | |
341c1fda JJ |
1652 | if (in_atomic) { |
1653 | /* | |
1654 | * out of reserve buffers and in atomic context so increase | |
1655 | * how many buffers to keep in reserve | |
1656 | */ | |
1657 | reserve_count++; | |
1658 | flags = GFP_ATOMIC; | |
1659 | } | |
df323337 SAS |
1660 | spin_unlock(&aa_buffers_lock); |
1661 | ||
341c1fda JJ |
1662 | if (!in_atomic) |
1663 | might_sleep(); | |
1664 | aa_buf = kmalloc(aa_g_path_max, flags); | |
df323337 SAS |
1665 | if (!aa_buf) { |
1666 | if (try_again) { | |
1667 | try_again = false; | |
1668 | goto retry; | |
1669 | } | |
1670 | pr_warn_once("AppArmor: Failed to allocate a memory buffer.\n"); | |
1671 | return NULL; | |
1672 | } | |
1673 | return &aa_buf->buffer[0]; | |
1674 | } | |
1675 | ||
1676 | void aa_put_buffer(char *buf) | |
1677 | { | |
1678 | union aa_buffer *aa_buf; | |
1679 | ||
1680 | if (!buf) | |
1681 | return; | |
1682 | aa_buf = container_of(buf, union aa_buffer, buffer[0]); | |
1683 | ||
1684 | spin_lock(&aa_buffers_lock); | |
1685 | list_add(&aa_buf->list, &aa_global_buffers); | |
341c1fda | 1686 | buffer_count++; |
df323337 SAS |
1687 | spin_unlock(&aa_buffers_lock); |
1688 | } | |
1689 | ||
b5e95b48 JJ |
1690 | /* |
1691 | * AppArmor init functions | |
1692 | */ | |
1693 | ||
1694 | /** | |
55a26ebf | 1695 | * set_init_ctx - set a task context and profile on the first task. |
b5e95b48 JJ |
1696 | * |
1697 | * TODO: allow setting an alternate profile than unconfined | |
1698 | */ | |
55a26ebf | 1699 | static int __init set_init_ctx(void) |
b5e95b48 | 1700 | { |
bf1d2ee7 | 1701 | struct cred *cred = (__force struct cred *)current->real_cred; |
b5e95b48 | 1702 | |
69b5a44a | 1703 | set_cred_label(cred, aa_get_label(ns_unconfined(root_ns))); |
b5e95b48 JJ |
1704 | |
1705 | return 0; | |
1706 | } | |
1707 | ||
d4669f0b JJ |
1708 | static void destroy_buffers(void) |
1709 | { | |
df323337 | 1710 | union aa_buffer *aa_buf; |
d4669f0b | 1711 | |
df323337 SAS |
1712 | spin_lock(&aa_buffers_lock); |
1713 | while (!list_empty(&aa_global_buffers)) { | |
1714 | aa_buf = list_first_entry(&aa_global_buffers, union aa_buffer, | |
1715 | list); | |
1716 | list_del(&aa_buf->list); | |
1717 | spin_unlock(&aa_buffers_lock); | |
1718 | kfree(aa_buf); | |
1719 | spin_lock(&aa_buffers_lock); | |
d4669f0b | 1720 | } |
df323337 | 1721 | spin_unlock(&aa_buffers_lock); |
d4669f0b JJ |
1722 | } |
1723 | ||
1724 | static int __init alloc_buffers(void) | |
1725 | { | |
df323337 SAS |
1726 | union aa_buffer *aa_buf; |
1727 | int i, num; | |
1728 | ||
1729 | /* | |
1730 | * A function may require two buffers at once. Usually the buffers are | |
1731 | * used for a short period of time and are shared. On UP kernel buffers | |
1732 | * two should be enough, with more CPUs it is possible that more | |
1733 | * buffers will be used simultaneously. The preallocated pool may grow. | |
1734 | * This preallocation has also the side-effect that AppArmor will be | |
1735 | * disabled early at boot if aa_g_path_max is extremly high. | |
1736 | */ | |
1737 | if (num_online_cpus() > 1) | |
341c1fda | 1738 | num = 4 + RESERVE_COUNT; |
df323337 | 1739 | else |
341c1fda | 1740 | num = 2 + RESERVE_COUNT; |
df323337 SAS |
1741 | |
1742 | for (i = 0; i < num; i++) { | |
1743 | ||
1744 | aa_buf = kmalloc(aa_g_path_max, GFP_KERNEL | | |
1745 | __GFP_RETRY_MAYFAIL | __GFP_NOWARN); | |
1746 | if (!aa_buf) { | |
1747 | destroy_buffers(); | |
1748 | return -ENOMEM; | |
d4669f0b | 1749 | } |
df323337 | 1750 | aa_put_buffer(&aa_buf->buffer[0]); |
d4669f0b | 1751 | } |
d4669f0b JJ |
1752 | return 0; |
1753 | } | |
1754 | ||
e3ea1ca5 TH |
1755 | #ifdef CONFIG_SYSCTL |
1756 | static int apparmor_dointvec(struct ctl_table *table, int write, | |
32927393 | 1757 | void *buffer, size_t *lenp, loff_t *ppos) |
e3ea1ca5 | 1758 | { |
92de220a | 1759 | if (!aa_current_policy_admin_capable(NULL)) |
e3ea1ca5 TH |
1760 | return -EPERM; |
1761 | if (!apparmor_enabled) | |
1762 | return -EINVAL; | |
1763 | ||
1764 | return proc_dointvec(table, write, buffer, lenp, ppos); | |
1765 | } | |
1766 | ||
1767 | static struct ctl_path apparmor_sysctl_path[] = { | |
1768 | { .procname = "kernel", }, | |
1769 | { } | |
1770 | }; | |
1771 | ||
1772 | static struct ctl_table apparmor_sysctl_table[] = { | |
1773 | { | |
1774 | .procname = "unprivileged_userns_apparmor_policy", | |
1775 | .data = &unprivileged_userns_apparmor_policy, | |
1776 | .maxlen = sizeof(int), | |
1777 | .mode = 0600, | |
1778 | .proc_handler = apparmor_dointvec, | |
1779 | }, | |
524d8e14 JJ |
1780 | { |
1781 | .procname = "apparmor_display_secid_mode", | |
1782 | .data = &apparmor_display_secid_mode, | |
1783 | .maxlen = sizeof(int), | |
1784 | .mode = 0600, | |
1785 | .proc_handler = apparmor_dointvec, | |
1786 | }, | |
1787 | ||
e3ea1ca5 TH |
1788 | { } |
1789 | }; | |
1790 | ||
1791 | static int __init apparmor_init_sysctl(void) | |
1792 | { | |
1793 | return register_sysctl_paths(apparmor_sysctl_path, | |
1794 | apparmor_sysctl_table) ? 0 : -ENOMEM; | |
1795 | } | |
1796 | #else | |
1797 | static inline int apparmor_init_sysctl(void) | |
1798 | { | |
1799 | return 0; | |
1800 | } | |
1801 | #endif /* CONFIG_SYSCTL */ | |
1802 | ||
e1af4779 | 1803 | #if defined(CONFIG_NETFILTER) && defined(CONFIG_NETWORK_SECMARK) |
ab9f2115 MG |
1804 | static unsigned int apparmor_ip_postroute(void *priv, |
1805 | struct sk_buff *skb, | |
1806 | const struct nf_hook_state *state) | |
1807 | { | |
1808 | struct aa_sk_ctx *ctx; | |
1809 | struct sock *sk; | |
1810 | ||
1811 | if (!skb->secmark) | |
1812 | return NF_ACCEPT; | |
1813 | ||
1814 | sk = skb_to_full_sk(skb); | |
1815 | if (sk == NULL) | |
1816 | return NF_ACCEPT; | |
1817 | ||
1818 | ctx = SK_CTX(sk); | |
1819 | if (!apparmor_secmark_check(ctx->label, OP_SENDMSG, AA_MAY_SEND, | |
1820 | skb->secmark, sk)) | |
1821 | return NF_ACCEPT; | |
1822 | ||
1823 | return NF_DROP_ERR(-ECONNREFUSED); | |
1824 | ||
1825 | } | |
1826 | ||
ab9f2115 MG |
1827 | static const struct nf_hook_ops apparmor_nf_ops[] = { |
1828 | { | |
7b721124 | 1829 | .hook = apparmor_ip_postroute, |
ab9f2115 MG |
1830 | .pf = NFPROTO_IPV4, |
1831 | .hooknum = NF_INET_POST_ROUTING, | |
1832 | .priority = NF_IP_PRI_SELINUX_FIRST, | |
1833 | }, | |
1834 | #if IS_ENABLED(CONFIG_IPV6) | |
1835 | { | |
7b721124 | 1836 | .hook = apparmor_ip_postroute, |
ab9f2115 MG |
1837 | .pf = NFPROTO_IPV6, |
1838 | .hooknum = NF_INET_POST_ROUTING, | |
1839 | .priority = NF_IP6_PRI_SELINUX_FIRST, | |
1840 | }, | |
1841 | #endif | |
1842 | }; | |
1843 | ||
1844 | static int __net_init apparmor_nf_register(struct net *net) | |
1845 | { | |
84117994 | 1846 | return nf_register_net_hooks(net, apparmor_nf_ops, |
ab9f2115 | 1847 | ARRAY_SIZE(apparmor_nf_ops)); |
ab9f2115 MG |
1848 | } |
1849 | ||
1850 | static void __net_exit apparmor_nf_unregister(struct net *net) | |
1851 | { | |
1852 | nf_unregister_net_hooks(net, apparmor_nf_ops, | |
1853 | ARRAY_SIZE(apparmor_nf_ops)); | |
1854 | } | |
1855 | ||
1856 | static struct pernet_operations apparmor_net_ops = { | |
1857 | .init = apparmor_nf_register, | |
1858 | .exit = apparmor_nf_unregister, | |
1859 | }; | |
1860 | ||
1861 | static int __init apparmor_nf_ip_init(void) | |
1862 | { | |
1863 | int err; | |
1864 | ||
1865 | if (!apparmor_enabled) | |
1866 | return 0; | |
1867 | ||
1868 | err = register_pernet_subsys(&apparmor_net_ops); | |
1869 | if (err) | |
1870 | panic("Apparmor: register_pernet_subsys: error %d\n", err); | |
1871 | ||
1872 | return 0; | |
1873 | } | |
1874 | __initcall(apparmor_nf_ip_init); | |
e1af4779 | 1875 | #endif |
ab9f2115 | 1876 | |
b5e95b48 JJ |
1877 | static int __init apparmor_init(void) |
1878 | { | |
1879 | int error; | |
1880 | ||
11c236b8 JJ |
1881 | error = aa_setup_dfa_engine(); |
1882 | if (error) { | |
1883 | AA_ERROR("Unable to setup dfa engine\n"); | |
1884 | goto alloc_out; | |
1885 | } | |
1886 | ||
b5e95b48 JJ |
1887 | error = aa_alloc_root_ns(); |
1888 | if (error) { | |
1889 | AA_ERROR("Unable to allocate default profile namespace\n"); | |
1890 | goto alloc_out; | |
1891 | } | |
1892 | ||
e3ea1ca5 TH |
1893 | error = apparmor_init_sysctl(); |
1894 | if (error) { | |
1895 | AA_ERROR("Unable to register sysctls\n"); | |
1896 | goto alloc_out; | |
1897 | ||
1898 | } | |
1899 | ||
d4669f0b JJ |
1900 | error = alloc_buffers(); |
1901 | if (error) { | |
1902 | AA_ERROR("Unable to allocate work buffers\n"); | |
df323337 | 1903 | goto alloc_out; |
d4669f0b JJ |
1904 | } |
1905 | ||
55a26ebf | 1906 | error = set_init_ctx(); |
b5e95b48 JJ |
1907 | if (error) { |
1908 | AA_ERROR("Failed to set context on init task\n"); | |
b1d9e6b0 | 1909 | aa_free_root_ns(); |
d4669f0b | 1910 | goto buffers_out; |
b5e95b48 | 1911 | } |
d69dece5 CS |
1912 | security_add_hooks(apparmor_hooks, ARRAY_SIZE(apparmor_hooks), |
1913 | "apparmor"); | |
b5e95b48 JJ |
1914 | |
1915 | /* Report that AppArmor successfully initialized */ | |
1916 | apparmor_initialized = 1; | |
1917 | if (aa_g_profile_mode == APPARMOR_COMPLAIN) | |
1918 | aa_info_message("AppArmor initialized: complain mode enabled"); | |
1919 | else if (aa_g_profile_mode == APPARMOR_KILL) | |
1920 | aa_info_message("AppArmor initialized: kill mode enabled"); | |
1921 | else | |
1922 | aa_info_message("AppArmor initialized"); | |
1923 | ||
1924 | return error; | |
1925 | ||
d4669f0b JJ |
1926 | buffers_out: |
1927 | destroy_buffers(); | |
b5e95b48 JJ |
1928 | alloc_out: |
1929 | aa_destroy_aafs(); | |
11c236b8 | 1930 | aa_teardown_dfa_engine(); |
b5e95b48 | 1931 | |
954317fe | 1932 | apparmor_enabled = false; |
b5e95b48 | 1933 | return error; |
b5e95b48 JJ |
1934 | } |
1935 | ||
3d6e5f6d | 1936 | DEFINE_LSM(apparmor) = { |
07aed2f2 | 1937 | .name = "apparmor", |
14bd99c8 | 1938 | .flags = LSM_FLAG_LEGACY_MAJOR | LSM_FLAG_EXCLUSIVE, |
c5459b82 | 1939 | .enabled = &apparmor_enabled, |
bbd3662a | 1940 | .blobs = &apparmor_blob_sizes, |
3d6e5f6d KC |
1941 | .init = apparmor_init, |
1942 | }; |