Commit | Line | Data |
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b69a54ee KT |
1 | /* |
2 | * security/tomoyo/file.c | |
3 | * | |
c3ef1500 | 4 | * Pathname restriction functions. |
b69a54ee | 5 | * |
c3ef1500 | 6 | * Copyright (C) 2005-2010 NTT DATA CORPORATION |
b69a54ee KT |
7 | */ |
8 | ||
9 | #include "common.h" | |
5a0e3ad6 | 10 | #include <linux/slab.h> |
b69a54ee | 11 | |
a1f9bb6a | 12 | /* Keyword array for operations with one pathname. */ |
71c28236 | 13 | const char *tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION] = { |
7ef61233 TH |
14 | [TOMOYO_TYPE_EXECUTE] = "execute", |
15 | [TOMOYO_TYPE_READ] = "read", | |
16 | [TOMOYO_TYPE_WRITE] = "write", | |
7c75964f | 17 | [TOMOYO_TYPE_APPEND] = "append", |
7ef61233 | 18 | [TOMOYO_TYPE_UNLINK] = "unlink", |
7c75964f | 19 | [TOMOYO_TYPE_GETATTR] = "getattr", |
7ef61233 | 20 | [TOMOYO_TYPE_RMDIR] = "rmdir", |
7ef61233 TH |
21 | [TOMOYO_TYPE_TRUNCATE] = "truncate", |
22 | [TOMOYO_TYPE_SYMLINK] = "symlink", | |
7ef61233 | 23 | [TOMOYO_TYPE_CHROOT] = "chroot", |
7ef61233 | 24 | [TOMOYO_TYPE_UMOUNT] = "unmount", |
b69a54ee KT |
25 | }; |
26 | ||
a1f9bb6a | 27 | /* Keyword array for operations with one pathname and three numbers. */ |
71c28236 | 28 | const char *tomoyo_mkdev_keyword[TOMOYO_MAX_MKDEV_OPERATION] = { |
a1f9bb6a TH |
29 | [TOMOYO_TYPE_MKBLOCK] = "mkblock", |
30 | [TOMOYO_TYPE_MKCHAR] = "mkchar", | |
31 | }; | |
32 | ||
33 | /* Keyword array for operations with two pathnames. */ | |
71c28236 | 34 | const char *tomoyo_path2_keyword[TOMOYO_MAX_PATH2_OPERATION] = { |
a1f9bb6a TH |
35 | [TOMOYO_TYPE_LINK] = "link", |
36 | [TOMOYO_TYPE_RENAME] = "rename", | |
7ef61233 | 37 | [TOMOYO_TYPE_PIVOT_ROOT] = "pivot_root", |
b69a54ee KT |
38 | }; |
39 | ||
a1f9bb6a | 40 | /* Keyword array for operations with one pathname and one number. */ |
71c28236 | 41 | const char *tomoyo_path_number_keyword[TOMOYO_MAX_PATH_NUMBER_OPERATION] = { |
a1f9bb6a TH |
42 | [TOMOYO_TYPE_CREATE] = "create", |
43 | [TOMOYO_TYPE_MKDIR] = "mkdir", | |
44 | [TOMOYO_TYPE_MKFIFO] = "mkfifo", | |
45 | [TOMOYO_TYPE_MKSOCK] = "mksock", | |
46 | [TOMOYO_TYPE_IOCTL] = "ioctl", | |
47 | [TOMOYO_TYPE_CHMOD] = "chmod", | |
48 | [TOMOYO_TYPE_CHOWN] = "chown", | |
49 | [TOMOYO_TYPE_CHGRP] = "chgrp", | |
50 | }; | |
51 | ||
0df7e8b8 TH |
52 | /* |
53 | * Mapping table from "enum tomoyo_path_acl_index" to "enum tomoyo_mac_index". | |
54 | */ | |
57c2590f | 55 | static const u8 tomoyo_p2mac[TOMOYO_MAX_PATH_OPERATION] = { |
57c2590f TH |
56 | [TOMOYO_TYPE_EXECUTE] = TOMOYO_MAC_FILE_EXECUTE, |
57 | [TOMOYO_TYPE_READ] = TOMOYO_MAC_FILE_OPEN, | |
58 | [TOMOYO_TYPE_WRITE] = TOMOYO_MAC_FILE_OPEN, | |
7c75964f | 59 | [TOMOYO_TYPE_APPEND] = TOMOYO_MAC_FILE_OPEN, |
57c2590f | 60 | [TOMOYO_TYPE_UNLINK] = TOMOYO_MAC_FILE_UNLINK, |
7c75964f | 61 | [TOMOYO_TYPE_GETATTR] = TOMOYO_MAC_FILE_GETATTR, |
57c2590f TH |
62 | [TOMOYO_TYPE_RMDIR] = TOMOYO_MAC_FILE_RMDIR, |
63 | [TOMOYO_TYPE_TRUNCATE] = TOMOYO_MAC_FILE_TRUNCATE, | |
64 | [TOMOYO_TYPE_SYMLINK] = TOMOYO_MAC_FILE_SYMLINK, | |
57c2590f TH |
65 | [TOMOYO_TYPE_CHROOT] = TOMOYO_MAC_FILE_CHROOT, |
66 | [TOMOYO_TYPE_UMOUNT] = TOMOYO_MAC_FILE_UMOUNT, | |
67 | }; | |
68 | ||
0df7e8b8 TH |
69 | /* |
70 | * Mapping table from "enum tomoyo_mkdev_acl_index" to "enum tomoyo_mac_index". | |
71 | */ | |
75093152 | 72 | static const u8 tomoyo_pnnn2mac[TOMOYO_MAX_MKDEV_OPERATION] = { |
57c2590f TH |
73 | [TOMOYO_TYPE_MKBLOCK] = TOMOYO_MAC_FILE_MKBLOCK, |
74 | [TOMOYO_TYPE_MKCHAR] = TOMOYO_MAC_FILE_MKCHAR, | |
75 | }; | |
76 | ||
0df7e8b8 TH |
77 | /* |
78 | * Mapping table from "enum tomoyo_path2_acl_index" to "enum tomoyo_mac_index". | |
79 | */ | |
57c2590f TH |
80 | static const u8 tomoyo_pp2mac[TOMOYO_MAX_PATH2_OPERATION] = { |
81 | [TOMOYO_TYPE_LINK] = TOMOYO_MAC_FILE_LINK, | |
82 | [TOMOYO_TYPE_RENAME] = TOMOYO_MAC_FILE_RENAME, | |
83 | [TOMOYO_TYPE_PIVOT_ROOT] = TOMOYO_MAC_FILE_PIVOT_ROOT, | |
84 | }; | |
85 | ||
0df7e8b8 TH |
86 | /* |
87 | * Mapping table from "enum tomoyo_path_number_acl_index" to | |
88 | * "enum tomoyo_mac_index". | |
89 | */ | |
57c2590f TH |
90 | static const u8 tomoyo_pn2mac[TOMOYO_MAX_PATH_NUMBER_OPERATION] = { |
91 | [TOMOYO_TYPE_CREATE] = TOMOYO_MAC_FILE_CREATE, | |
92 | [TOMOYO_TYPE_MKDIR] = TOMOYO_MAC_FILE_MKDIR, | |
93 | [TOMOYO_TYPE_MKFIFO] = TOMOYO_MAC_FILE_MKFIFO, | |
94 | [TOMOYO_TYPE_MKSOCK] = TOMOYO_MAC_FILE_MKSOCK, | |
95 | [TOMOYO_TYPE_IOCTL] = TOMOYO_MAC_FILE_IOCTL, | |
96 | [TOMOYO_TYPE_CHMOD] = TOMOYO_MAC_FILE_CHMOD, | |
97 | [TOMOYO_TYPE_CHOWN] = TOMOYO_MAC_FILE_CHOWN, | |
98 | [TOMOYO_TYPE_CHGRP] = TOMOYO_MAC_FILE_CHGRP, | |
99 | }; | |
100 | ||
0df7e8b8 TH |
101 | /** |
102 | * tomoyo_put_name_union - Drop reference on "struct tomoyo_name_union". | |
103 | * | |
104 | * @ptr: Pointer to "struct tomoyo_name_union". | |
105 | * | |
106 | * Returns nothing. | |
107 | */ | |
7762fbff TH |
108 | void tomoyo_put_name_union(struct tomoyo_name_union *ptr) |
109 | { | |
0df7e8b8 TH |
110 | tomoyo_put_group(ptr->group); |
111 | tomoyo_put_name(ptr->filename); | |
7762fbff TH |
112 | } |
113 | ||
0df7e8b8 TH |
114 | /** |
115 | * tomoyo_compare_name_union - Check whether a name matches "struct tomoyo_name_union" or not. | |
116 | * | |
117 | * @name: Pointer to "struct tomoyo_path_info". | |
118 | * @ptr: Pointer to "struct tomoyo_name_union". | |
119 | * | |
120 | * Returns "struct tomoyo_path_info" if @name matches @ptr, NULL otherwise. | |
121 | */ | |
484ca79c TH |
122 | const struct tomoyo_path_info * |
123 | tomoyo_compare_name_union(const struct tomoyo_path_info *name, | |
124 | const struct tomoyo_name_union *ptr) | |
7762fbff | 125 | { |
0df7e8b8 | 126 | if (ptr->group) |
3f629636 | 127 | return tomoyo_path_matches_group(name, ptr->group); |
484ca79c TH |
128 | if (tomoyo_path_matches_pattern(name, ptr->filename)) |
129 | return ptr->filename; | |
130 | return NULL; | |
7762fbff TH |
131 | } |
132 | ||
0df7e8b8 TH |
133 | /** |
134 | * tomoyo_put_number_union - Drop reference on "struct tomoyo_number_union". | |
135 | * | |
136 | * @ptr: Pointer to "struct tomoyo_number_union". | |
137 | * | |
138 | * Returns nothing. | |
139 | */ | |
4c3e9e2d TH |
140 | void tomoyo_put_number_union(struct tomoyo_number_union *ptr) |
141 | { | |
0df7e8b8 | 142 | tomoyo_put_group(ptr->group); |
4c3e9e2d TH |
143 | } |
144 | ||
0df7e8b8 TH |
145 | /** |
146 | * tomoyo_compare_number_union - Check whether a value matches "struct tomoyo_number_union" or not. | |
147 | * | |
148 | * @value: Number to check. | |
149 | * @ptr: Pointer to "struct tomoyo_number_union". | |
150 | * | |
151 | * Returns true if @value matches @ptr, false otherwise. | |
152 | */ | |
4c3e9e2d TH |
153 | bool tomoyo_compare_number_union(const unsigned long value, |
154 | const struct tomoyo_number_union *ptr) | |
155 | { | |
0df7e8b8 | 156 | if (ptr->group) |
4c3e9e2d TH |
157 | return tomoyo_number_matches_group(value, value, ptr->group); |
158 | return value >= ptr->values[0] && value <= ptr->values[1]; | |
159 | } | |
160 | ||
0df7e8b8 TH |
161 | /** |
162 | * tomoyo_add_slash - Add trailing '/' if needed. | |
163 | * | |
164 | * @buf: Pointer to "struct tomoyo_path_info". | |
165 | * | |
166 | * Returns nothing. | |
167 | * | |
168 | * @buf must be generated by tomoyo_encode() because this function does not | |
169 | * allocate memory for adding '/'. | |
170 | */ | |
c8c57e84 TH |
171 | static void tomoyo_add_slash(struct tomoyo_path_info *buf) |
172 | { | |
173 | if (buf->is_dir) | |
174 | return; | |
175 | /* | |
176 | * This is OK because tomoyo_encode() reserves space for appending "/". | |
177 | */ | |
178 | strcat((char *) buf->name, "/"); | |
179 | tomoyo_fill_path_info(buf); | |
180 | } | |
181 | ||
b69a54ee | 182 | /** |
c8c57e84 | 183 | * tomoyo_get_realpath - Get realpath. |
b69a54ee | 184 | * |
c8c57e84 | 185 | * @buf: Pointer to "struct tomoyo_path_info". |
b69a54ee KT |
186 | * @path: Pointer to "struct path". |
187 | * | |
c8c57e84 | 188 | * Returns true on success, false otherwise. |
b69a54ee | 189 | */ |
c8c57e84 | 190 | static bool tomoyo_get_realpath(struct tomoyo_path_info *buf, struct path *path) |
b69a54ee | 191 | { |
c8c57e84 TH |
192 | buf->name = tomoyo_realpath_from_path(path); |
193 | if (buf->name) { | |
194 | tomoyo_fill_path_info(buf); | |
195 | return true; | |
b69a54ee | 196 | } |
c8c57e84 | 197 | return false; |
b69a54ee KT |
198 | } |
199 | ||
99a85259 TH |
200 | /** |
201 | * tomoyo_audit_path_log - Audit path request log. | |
202 | * | |
203 | * @r: Pointer to "struct tomoyo_request_info". | |
204 | * | |
205 | * Returns 0 on success, negative value otherwise. | |
206 | */ | |
207 | static int tomoyo_audit_path_log(struct tomoyo_request_info *r) | |
208 | { | |
209 | const char *operation = tomoyo_path_keyword[r->param.path.operation]; | |
210 | const struct tomoyo_path_info *filename = r->param.path.filename; | |
211 | if (r->granted) | |
212 | return 0; | |
213 | tomoyo_warn_log(r, "%s %s", operation, filename->name); | |
214 | return tomoyo_supervisor(r, "allow_%s %s\n", operation, | |
7c75964f | 215 | filename->name); |
99a85259 TH |
216 | } |
217 | ||
218 | /** | |
219 | * tomoyo_audit_path2_log - Audit path/path request log. | |
220 | * | |
221 | * @r: Pointer to "struct tomoyo_request_info". | |
222 | * | |
223 | * Returns 0 on success, negative value otherwise. | |
224 | */ | |
225 | static int tomoyo_audit_path2_log(struct tomoyo_request_info *r) | |
226 | { | |
227 | const char *operation = tomoyo_path2_keyword[r->param.path2.operation]; | |
228 | const struct tomoyo_path_info *filename1 = r->param.path2.filename1; | |
229 | const struct tomoyo_path_info *filename2 = r->param.path2.filename2; | |
230 | if (r->granted) | |
231 | return 0; | |
232 | tomoyo_warn_log(r, "%s %s %s", operation, filename1->name, | |
233 | filename2->name); | |
234 | return tomoyo_supervisor(r, "allow_%s %s %s\n", operation, | |
7c75964f | 235 | filename1->name, filename2->name); |
99a85259 TH |
236 | } |
237 | ||
238 | /** | |
239 | * tomoyo_audit_mkdev_log - Audit path/number/number/number request log. | |
240 | * | |
241 | * @r: Pointer to "struct tomoyo_request_info". | |
242 | * | |
243 | * Returns 0 on success, negative value otherwise. | |
244 | */ | |
245 | static int tomoyo_audit_mkdev_log(struct tomoyo_request_info *r) | |
246 | { | |
71c28236 | 247 | const char *operation = tomoyo_mkdev_keyword[r->param.mkdev.operation]; |
99a85259 TH |
248 | const struct tomoyo_path_info *filename = r->param.mkdev.filename; |
249 | const unsigned int major = r->param.mkdev.major; | |
250 | const unsigned int minor = r->param.mkdev.minor; | |
251 | const unsigned int mode = r->param.mkdev.mode; | |
252 | if (r->granted) | |
253 | return 0; | |
254 | tomoyo_warn_log(r, "%s %s 0%o %u %u", operation, filename->name, mode, | |
255 | major, minor); | |
256 | return tomoyo_supervisor(r, "allow_%s %s 0%o %u %u\n", operation, | |
7c75964f | 257 | filename->name, mode, major, minor); |
99a85259 TH |
258 | } |
259 | ||
260 | /** | |
261 | * tomoyo_audit_path_number_log - Audit path/number request log. | |
262 | * | |
b5bc60b4 | 263 | * @r: Pointer to "struct tomoyo_request_info". |
99a85259 TH |
264 | * |
265 | * Returns 0 on success, negative value otherwise. | |
266 | */ | |
267 | static int tomoyo_audit_path_number_log(struct tomoyo_request_info *r) | |
268 | { | |
269 | const u8 type = r->param.path_number.operation; | |
270 | u8 radix; | |
271 | const struct tomoyo_path_info *filename = r->param.path_number.filename; | |
272 | const char *operation = tomoyo_path_number_keyword[type]; | |
273 | char buffer[64]; | |
274 | if (r->granted) | |
275 | return 0; | |
276 | switch (type) { | |
277 | case TOMOYO_TYPE_CREATE: | |
278 | case TOMOYO_TYPE_MKDIR: | |
279 | case TOMOYO_TYPE_MKFIFO: | |
280 | case TOMOYO_TYPE_MKSOCK: | |
281 | case TOMOYO_TYPE_CHMOD: | |
282 | radix = TOMOYO_VALUE_TYPE_OCTAL; | |
283 | break; | |
284 | case TOMOYO_TYPE_IOCTL: | |
285 | radix = TOMOYO_VALUE_TYPE_HEXADECIMAL; | |
286 | break; | |
287 | default: | |
288 | radix = TOMOYO_VALUE_TYPE_DECIMAL; | |
289 | break; | |
290 | } | |
291 | tomoyo_print_ulong(buffer, sizeof(buffer), r->param.path_number.number, | |
292 | radix); | |
293 | tomoyo_warn_log(r, "%s %s %s", operation, filename->name, buffer); | |
294 | return tomoyo_supervisor(r, "allow_%s %s %s\n", operation, | |
7c75964f | 295 | filename->name, buffer); |
b69a54ee KT |
296 | } |
297 | ||
0df7e8b8 TH |
298 | /** |
299 | * tomoyo_check_path_acl - Check permission for path operation. | |
300 | * | |
301 | * @r: Pointer to "struct tomoyo_request_info". | |
302 | * @ptr: Pointer to "struct tomoyo_acl_info". | |
303 | * | |
304 | * Returns true if granted, false otherwise. | |
305 | * | |
306 | * To be able to use wildcard for domain transition, this function sets | |
307 | * matching entry on success. Since the caller holds tomoyo_read_lock(), | |
308 | * it is safe to set matching entry. | |
309 | */ | |
484ca79c | 310 | static bool tomoyo_check_path_acl(struct tomoyo_request_info *r, |
99a85259 | 311 | const struct tomoyo_acl_info *ptr) |
b69a54ee | 312 | { |
99a85259 TH |
313 | const struct tomoyo_path_acl *acl = container_of(ptr, typeof(*acl), |
314 | head); | |
484ca79c TH |
315 | if (acl->perm & (1 << r->param.path.operation)) { |
316 | r->param.path.matched_path = | |
317 | tomoyo_compare_name_union(r->param.path.filename, | |
318 | &acl->name); | |
319 | return r->param.path.matched_path != NULL; | |
320 | } | |
321 | return false; | |
99a85259 | 322 | } |
b69a54ee | 323 | |
0df7e8b8 TH |
324 | /** |
325 | * tomoyo_check_path_number_acl - Check permission for path number operation. | |
326 | * | |
327 | * @r: Pointer to "struct tomoyo_request_info". | |
328 | * @ptr: Pointer to "struct tomoyo_acl_info". | |
329 | * | |
330 | * Returns true if granted, false otherwise. | |
331 | */ | |
484ca79c | 332 | static bool tomoyo_check_path_number_acl(struct tomoyo_request_info *r, |
99a85259 TH |
333 | const struct tomoyo_acl_info *ptr) |
334 | { | |
335 | const struct tomoyo_path_number_acl *acl = | |
336 | container_of(ptr, typeof(*acl), head); | |
337 | return (acl->perm & (1 << r->param.path_number.operation)) && | |
338 | tomoyo_compare_number_union(r->param.path_number.number, | |
339 | &acl->number) && | |
340 | tomoyo_compare_name_union(r->param.path_number.filename, | |
341 | &acl->name); | |
342 | } | |
343 | ||
0df7e8b8 TH |
344 | /** |
345 | * tomoyo_check_path2_acl - Check permission for path path operation. | |
346 | * | |
347 | * @r: Pointer to "struct tomoyo_request_info". | |
348 | * @ptr: Pointer to "struct tomoyo_acl_info". | |
349 | * | |
350 | * Returns true if granted, false otherwise. | |
351 | */ | |
484ca79c | 352 | static bool tomoyo_check_path2_acl(struct tomoyo_request_info *r, |
99a85259 TH |
353 | const struct tomoyo_acl_info *ptr) |
354 | { | |
355 | const struct tomoyo_path2_acl *acl = | |
356 | container_of(ptr, typeof(*acl), head); | |
357 | return (acl->perm & (1 << r->param.path2.operation)) && | |
358 | tomoyo_compare_name_union(r->param.path2.filename1, &acl->name1) | |
359 | && tomoyo_compare_name_union(r->param.path2.filename2, | |
360 | &acl->name2); | |
361 | } | |
362 | ||
0df7e8b8 TH |
363 | /** |
364 | * tomoyo_check_mkdev_acl - Check permission for path number number number operation. | |
365 | * | |
366 | * @r: Pointer to "struct tomoyo_request_info". | |
367 | * @ptr: Pointer to "struct tomoyo_acl_info". | |
368 | * | |
369 | * Returns true if granted, false otherwise. | |
370 | */ | |
484ca79c | 371 | static bool tomoyo_check_mkdev_acl(struct tomoyo_request_info *r, |
0df7e8b8 | 372 | const struct tomoyo_acl_info *ptr) |
99a85259 | 373 | { |
75093152 | 374 | const struct tomoyo_mkdev_acl *acl = |
99a85259 TH |
375 | container_of(ptr, typeof(*acl), head); |
376 | return (acl->perm & (1 << r->param.mkdev.operation)) && | |
377 | tomoyo_compare_number_union(r->param.mkdev.mode, | |
378 | &acl->mode) && | |
379 | tomoyo_compare_number_union(r->param.mkdev.major, | |
380 | &acl->major) && | |
381 | tomoyo_compare_number_union(r->param.mkdev.minor, | |
382 | &acl->minor) && | |
383 | tomoyo_compare_name_union(r->param.mkdev.filename, | |
384 | &acl->name); | |
b69a54ee KT |
385 | } |
386 | ||
0df7e8b8 TH |
387 | /** |
388 | * tomoyo_same_path_acl - Check for duplicated "struct tomoyo_path_acl" entry. | |
389 | * | |
390 | * @a: Pointer to "struct tomoyo_acl_info". | |
391 | * @b: Pointer to "struct tomoyo_acl_info". | |
392 | * | |
393 | * Returns true if @a == @b except permission bits, false otherwise. | |
394 | */ | |
237ab459 TH |
395 | static bool tomoyo_same_path_acl(const struct tomoyo_acl_info *a, |
396 | const struct tomoyo_acl_info *b) | |
397 | { | |
398 | const struct tomoyo_path_acl *p1 = container_of(a, typeof(*p1), head); | |
399 | const struct tomoyo_path_acl *p2 = container_of(b, typeof(*p2), head); | |
0df7e8b8 | 400 | return tomoyo_same_name_union(&p1->name, &p2->name); |
237ab459 TH |
401 | } |
402 | ||
7c75964f TH |
403 | /** |
404 | * tomoyo_merge_path_acl - Merge duplicated "struct tomoyo_path_acl" entry. | |
405 | * | |
406 | * @a: Pointer to "struct tomoyo_acl_info". | |
407 | * @b: Pointer to "struct tomoyo_acl_info". | |
408 | * @is_delete: True for @a &= ~@b, false for @a |= @b. | |
409 | * | |
410 | * Returns true if @a is empty, false otherwise. | |
411 | */ | |
237ab459 TH |
412 | static bool tomoyo_merge_path_acl(struct tomoyo_acl_info *a, |
413 | struct tomoyo_acl_info *b, | |
414 | const bool is_delete) | |
415 | { | |
416 | u16 * const a_perm = &container_of(a, struct tomoyo_path_acl, head) | |
417 | ->perm; | |
418 | u16 perm = *a_perm; | |
419 | const u16 b_perm = container_of(b, struct tomoyo_path_acl, head)->perm; | |
7c75964f | 420 | if (is_delete) |
237ab459 | 421 | perm &= ~b_perm; |
7c75964f | 422 | else |
237ab459 | 423 | perm |= b_perm; |
237ab459 TH |
424 | *a_perm = perm; |
425 | return !perm; | |
426 | } | |
427 | ||
b69a54ee | 428 | /** |
7ef61233 | 429 | * tomoyo_update_path_acl - Update "struct tomoyo_path_acl" list. |
b69a54ee KT |
430 | * |
431 | * @type: Type of operation. | |
432 | * @filename: Filename. | |
433 | * @domain: Pointer to "struct tomoyo_domain_info". | |
434 | * @is_delete: True if it is a delete request. | |
435 | * | |
436 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
437 | * |
438 | * Caller holds tomoyo_read_lock(). | |
b69a54ee | 439 | */ |
7ef61233 | 440 | static int tomoyo_update_path_acl(const u8 type, const char *filename, |
237ab459 | 441 | struct tomoyo_domain_info * const domain, |
7ef61233 | 442 | const bool is_delete) |
b69a54ee | 443 | { |
9e4b50e9 TH |
444 | struct tomoyo_path_acl e = { |
445 | .head.type = TOMOYO_TYPE_PATH_ACL, | |
237ab459 | 446 | .perm = 1 << type |
9e4b50e9 | 447 | }; |
237ab459 | 448 | int error; |
7762fbff | 449 | if (!tomoyo_parse_name_union(filename, &e.name)) |
b69a54ee | 450 | return -EINVAL; |
237ab459 TH |
451 | error = tomoyo_update_domain(&e.head, sizeof(e), is_delete, domain, |
452 | tomoyo_same_path_acl, | |
453 | tomoyo_merge_path_acl); | |
7762fbff | 454 | tomoyo_put_name_union(&e.name); |
b69a54ee KT |
455 | return error; |
456 | } | |
457 | ||
0df7e8b8 TH |
458 | /** |
459 | * tomoyo_same_mkdev_acl - Check for duplicated "struct tomoyo_mkdev_acl" entry. | |
460 | * | |
461 | * @a: Pointer to "struct tomoyo_acl_info". | |
462 | * @b: Pointer to "struct tomoyo_acl_info". | |
463 | * | |
464 | * Returns true if @a == @b except permission bits, false otherwise. | |
465 | */ | |
75093152 | 466 | static bool tomoyo_same_mkdev_acl(const struct tomoyo_acl_info *a, |
237ab459 TH |
467 | const struct tomoyo_acl_info *b) |
468 | { | |
0df7e8b8 TH |
469 | const struct tomoyo_mkdev_acl *p1 = container_of(a, typeof(*p1), head); |
470 | const struct tomoyo_mkdev_acl *p2 = container_of(b, typeof(*p2), head); | |
471 | return tomoyo_same_name_union(&p1->name, &p2->name) && | |
472 | tomoyo_same_number_union(&p1->mode, &p2->mode) && | |
473 | tomoyo_same_number_union(&p1->major, &p2->major) && | |
474 | tomoyo_same_number_union(&p1->minor, &p2->minor); | |
237ab459 TH |
475 | } |
476 | ||
0df7e8b8 TH |
477 | /** |
478 | * tomoyo_merge_mkdev_acl - Merge duplicated "struct tomoyo_mkdev_acl" entry. | |
479 | * | |
480 | * @a: Pointer to "struct tomoyo_acl_info". | |
481 | * @b: Pointer to "struct tomoyo_acl_info". | |
482 | * @is_delete: True for @a &= ~@b, false for @a |= @b. | |
483 | * | |
484 | * Returns true if @a is empty, false otherwise. | |
485 | */ | |
75093152 | 486 | static bool tomoyo_merge_mkdev_acl(struct tomoyo_acl_info *a, |
0df7e8b8 TH |
487 | struct tomoyo_acl_info *b, |
488 | const bool is_delete) | |
237ab459 | 489 | { |
75093152 | 490 | u8 *const a_perm = &container_of(a, struct tomoyo_mkdev_acl, |
237ab459 TH |
491 | head)->perm; |
492 | u8 perm = *a_perm; | |
75093152 | 493 | const u8 b_perm = container_of(b, struct tomoyo_mkdev_acl, head) |
237ab459 TH |
494 | ->perm; |
495 | if (is_delete) | |
496 | perm &= ~b_perm; | |
497 | else | |
498 | perm |= b_perm; | |
499 | *a_perm = perm; | |
500 | return !perm; | |
501 | } | |
502 | ||
a1f9bb6a | 503 | /** |
75093152 | 504 | * tomoyo_update_mkdev_acl - Update "struct tomoyo_mkdev_acl" list. |
a1f9bb6a TH |
505 | * |
506 | * @type: Type of operation. | |
507 | * @filename: Filename. | |
508 | * @mode: Create mode. | |
509 | * @major: Device major number. | |
510 | * @minor: Device minor number. | |
511 | * @domain: Pointer to "struct tomoyo_domain_info". | |
512 | * @is_delete: True if it is a delete request. | |
513 | * | |
514 | * Returns 0 on success, negative value otherwise. | |
237ab459 TH |
515 | * |
516 | * Caller holds tomoyo_read_lock(). | |
a1f9bb6a | 517 | */ |
75093152 | 518 | static int tomoyo_update_mkdev_acl(const u8 type, const char *filename, |
0df7e8b8 TH |
519 | char *mode, char *major, char *minor, |
520 | struct tomoyo_domain_info * const domain, | |
521 | const bool is_delete) | |
a1f9bb6a | 522 | { |
75093152 TH |
523 | struct tomoyo_mkdev_acl e = { |
524 | .head.type = TOMOYO_TYPE_MKDEV_ACL, | |
237ab459 | 525 | .perm = 1 << type |
a1f9bb6a TH |
526 | }; |
527 | int error = is_delete ? -ENOENT : -ENOMEM; | |
528 | if (!tomoyo_parse_name_union(filename, &e.name) || | |
529 | !tomoyo_parse_number_union(mode, &e.mode) || | |
530 | !tomoyo_parse_number_union(major, &e.major) || | |
531 | !tomoyo_parse_number_union(minor, &e.minor)) | |
532 | goto out; | |
237ab459 | 533 | error = tomoyo_update_domain(&e.head, sizeof(e), is_delete, domain, |
75093152 TH |
534 | tomoyo_same_mkdev_acl, |
535 | tomoyo_merge_mkdev_acl); | |
a1f9bb6a TH |
536 | out: |
537 | tomoyo_put_name_union(&e.name); | |
538 | tomoyo_put_number_union(&e.mode); | |
539 | tomoyo_put_number_union(&e.major); | |
540 | tomoyo_put_number_union(&e.minor); | |
541 | return error; | |
542 | } | |
543 | ||
0df7e8b8 TH |
544 | /** |
545 | * tomoyo_same_path2_acl - Check for duplicated "struct tomoyo_path2_acl" entry. | |
546 | * | |
547 | * @a: Pointer to "struct tomoyo_acl_info". | |
548 | * @b: Pointer to "struct tomoyo_acl_info". | |
549 | * | |
550 | * Returns true if @a == @b except permission bits, false otherwise. | |
551 | */ | |
237ab459 TH |
552 | static bool tomoyo_same_path2_acl(const struct tomoyo_acl_info *a, |
553 | const struct tomoyo_acl_info *b) | |
554 | { | |
555 | const struct tomoyo_path2_acl *p1 = container_of(a, typeof(*p1), head); | |
556 | const struct tomoyo_path2_acl *p2 = container_of(b, typeof(*p2), head); | |
0df7e8b8 TH |
557 | return tomoyo_same_name_union(&p1->name1, &p2->name1) && |
558 | tomoyo_same_name_union(&p1->name2, &p2->name2); | |
237ab459 TH |
559 | } |
560 | ||
0df7e8b8 TH |
561 | /** |
562 | * tomoyo_merge_path2_acl - Merge duplicated "struct tomoyo_path2_acl" entry. | |
563 | * | |
564 | * @a: Pointer to "struct tomoyo_acl_info". | |
565 | * @b: Pointer to "struct tomoyo_acl_info". | |
566 | * @is_delete: True for @a &= ~@b, false for @a |= @b. | |
567 | * | |
568 | * Returns true if @a is empty, false otherwise. | |
569 | */ | |
237ab459 TH |
570 | static bool tomoyo_merge_path2_acl(struct tomoyo_acl_info *a, |
571 | struct tomoyo_acl_info *b, | |
572 | const bool is_delete) | |
573 | { | |
574 | u8 * const a_perm = &container_of(a, struct tomoyo_path2_acl, head) | |
575 | ->perm; | |
576 | u8 perm = *a_perm; | |
577 | const u8 b_perm = container_of(b, struct tomoyo_path2_acl, head)->perm; | |
578 | if (is_delete) | |
579 | perm &= ~b_perm; | |
580 | else | |
581 | perm |= b_perm; | |
582 | *a_perm = perm; | |
583 | return !perm; | |
584 | } | |
585 | ||
b69a54ee | 586 | /** |
7ef61233 | 587 | * tomoyo_update_path2_acl - Update "struct tomoyo_path2_acl" list. |
b69a54ee KT |
588 | * |
589 | * @type: Type of operation. | |
590 | * @filename1: First filename. | |
591 | * @filename2: Second filename. | |
592 | * @domain: Pointer to "struct tomoyo_domain_info". | |
593 | * @is_delete: True if it is a delete request. | |
594 | * | |
595 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
596 | * |
597 | * Caller holds tomoyo_read_lock(). | |
b69a54ee | 598 | */ |
7ef61233 TH |
599 | static int tomoyo_update_path2_acl(const u8 type, const char *filename1, |
600 | const char *filename2, | |
237ab459 | 601 | struct tomoyo_domain_info * const domain, |
7ef61233 | 602 | const bool is_delete) |
b69a54ee | 603 | { |
9e4b50e9 TH |
604 | struct tomoyo_path2_acl e = { |
605 | .head.type = TOMOYO_TYPE_PATH2_ACL, | |
237ab459 | 606 | .perm = 1 << type |
9e4b50e9 | 607 | }; |
ca0b7df3 | 608 | int error = is_delete ? -ENOENT : -ENOMEM; |
7762fbff TH |
609 | if (!tomoyo_parse_name_union(filename1, &e.name1) || |
610 | !tomoyo_parse_name_union(filename2, &e.name2)) | |
ca0b7df3 | 611 | goto out; |
237ab459 TH |
612 | error = tomoyo_update_domain(&e.head, sizeof(e), is_delete, domain, |
613 | tomoyo_same_path2_acl, | |
614 | tomoyo_merge_path2_acl); | |
ca0b7df3 | 615 | out: |
7762fbff TH |
616 | tomoyo_put_name_union(&e.name1); |
617 | tomoyo_put_name_union(&e.name2); | |
b69a54ee KT |
618 | return error; |
619 | } | |
620 | ||
b69a54ee | 621 | /** |
cb0abe6a | 622 | * tomoyo_path_permission - Check permission for single path operation. |
b69a54ee | 623 | * |
cb0abe6a | 624 | * @r: Pointer to "struct tomoyo_request_info". |
b69a54ee KT |
625 | * @operation: Type of operation. |
626 | * @filename: Filename to check. | |
b69a54ee KT |
627 | * |
628 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
629 | * |
630 | * Caller holds tomoyo_read_lock(). | |
b69a54ee | 631 | */ |
05336dee TH |
632 | int tomoyo_path_permission(struct tomoyo_request_info *r, u8 operation, |
633 | const struct tomoyo_path_info *filename) | |
b69a54ee | 634 | { |
b69a54ee | 635 | int error; |
b69a54ee | 636 | |
57c2590f TH |
637 | r->type = tomoyo_p2mac[operation]; |
638 | r->mode = tomoyo_get_mode(r->profile, r->type); | |
639 | if (r->mode == TOMOYO_CONFIG_DISABLED) | |
640 | return 0; | |
cf6e9a64 TH |
641 | r->param_type = TOMOYO_TYPE_PATH_ACL; |
642 | r->param.path.filename = filename; | |
643 | r->param.path.operation = operation; | |
17fcfbd9 | 644 | do { |
99a85259 | 645 | tomoyo_check_acl(r, tomoyo_check_path_acl); |
99a85259 | 646 | error = tomoyo_audit_path_log(r); |
05336dee TH |
647 | /* |
648 | * Do not retry for execute request, for alias may have | |
649 | * changed. | |
650 | */ | |
651 | } while (error == TOMOYO_RETRY_REQUEST && | |
652 | operation != TOMOYO_TYPE_EXECUTE); | |
b69a54ee KT |
653 | return error; |
654 | } | |
655 | ||
0df7e8b8 TH |
656 | /** |
657 | * tomoyo_same_path_number_acl - Check for duplicated "struct tomoyo_path_number_acl" entry. | |
658 | * | |
659 | * @a: Pointer to "struct tomoyo_acl_info". | |
660 | * @b: Pointer to "struct tomoyo_acl_info". | |
661 | * | |
662 | * Returns true if @a == @b except permission bits, false otherwise. | |
663 | */ | |
237ab459 TH |
664 | static bool tomoyo_same_path_number_acl(const struct tomoyo_acl_info *a, |
665 | const struct tomoyo_acl_info *b) | |
666 | { | |
667 | const struct tomoyo_path_number_acl *p1 = container_of(a, typeof(*p1), | |
668 | head); | |
669 | const struct tomoyo_path_number_acl *p2 = container_of(b, typeof(*p2), | |
670 | head); | |
0df7e8b8 TH |
671 | return tomoyo_same_name_union(&p1->name, &p2->name) && |
672 | tomoyo_same_number_union(&p1->number, &p2->number); | |
237ab459 TH |
673 | } |
674 | ||
0df7e8b8 TH |
675 | /** |
676 | * tomoyo_merge_path_number_acl - Merge duplicated "struct tomoyo_path_number_acl" entry. | |
677 | * | |
678 | * @a: Pointer to "struct tomoyo_acl_info". | |
679 | * @b: Pointer to "struct tomoyo_acl_info". | |
680 | * @is_delete: True for @a &= ~@b, false for @a |= @b. | |
681 | * | |
682 | * Returns true if @a is empty, false otherwise. | |
683 | */ | |
237ab459 TH |
684 | static bool tomoyo_merge_path_number_acl(struct tomoyo_acl_info *a, |
685 | struct tomoyo_acl_info *b, | |
686 | const bool is_delete) | |
687 | { | |
688 | u8 * const a_perm = &container_of(a, struct tomoyo_path_number_acl, | |
689 | head)->perm; | |
690 | u8 perm = *a_perm; | |
691 | const u8 b_perm = container_of(b, struct tomoyo_path_number_acl, head) | |
692 | ->perm; | |
693 | if (is_delete) | |
694 | perm &= ~b_perm; | |
695 | else | |
696 | perm |= b_perm; | |
697 | *a_perm = perm; | |
698 | return !perm; | |
699 | } | |
700 | ||
a1f9bb6a TH |
701 | /** |
702 | * tomoyo_update_path_number_acl - Update ioctl/chmod/chown/chgrp ACL. | |
703 | * | |
704 | * @type: Type of operation. | |
705 | * @filename: Filename. | |
706 | * @number: Number. | |
707 | * @domain: Pointer to "struct tomoyo_domain_info". | |
708 | * @is_delete: True if it is a delete request. | |
709 | * | |
710 | * Returns 0 on success, negative value otherwise. | |
711 | */ | |
237ab459 TH |
712 | static int tomoyo_update_path_number_acl(const u8 type, const char *filename, |
713 | char *number, | |
714 | struct tomoyo_domain_info * const | |
0df7e8b8 | 715 | domain, const bool is_delete) |
a1f9bb6a | 716 | { |
a1f9bb6a TH |
717 | struct tomoyo_path_number_acl e = { |
718 | .head.type = TOMOYO_TYPE_PATH_NUMBER_ACL, | |
237ab459 | 719 | .perm = 1 << type |
a1f9bb6a TH |
720 | }; |
721 | int error = is_delete ? -ENOENT : -ENOMEM; | |
a1f9bb6a TH |
722 | if (!tomoyo_parse_name_union(filename, &e.name)) |
723 | return -EINVAL; | |
724 | if (!tomoyo_parse_number_union(number, &e.number)) | |
725 | goto out; | |
237ab459 TH |
726 | error = tomoyo_update_domain(&e.head, sizeof(e), is_delete, domain, |
727 | tomoyo_same_path_number_acl, | |
728 | tomoyo_merge_path_number_acl); | |
a1f9bb6a TH |
729 | out: |
730 | tomoyo_put_name_union(&e.name); | |
731 | tomoyo_put_number_union(&e.number); | |
732 | return error; | |
733 | } | |
734 | ||
a1f9bb6a TH |
735 | /** |
736 | * tomoyo_path_number_perm - Check permission for "create", "mkdir", "mkfifo", "mksock", "ioctl", "chmod", "chown", "chgrp". | |
737 | * | |
738 | * @type: Type of operation. | |
739 | * @path: Pointer to "struct path". | |
740 | * @number: Number. | |
741 | * | |
742 | * Returns 0 on success, negative value otherwise. | |
743 | */ | |
744 | int tomoyo_path_number_perm(const u8 type, struct path *path, | |
745 | unsigned long number) | |
746 | { | |
747 | struct tomoyo_request_info r; | |
748 | int error = -ENOMEM; | |
c8c57e84 | 749 | struct tomoyo_path_info buf; |
a1f9bb6a TH |
750 | int idx; |
751 | ||
57c2590f TH |
752 | if (tomoyo_init_request_info(&r, NULL, tomoyo_pn2mac[type]) |
753 | == TOMOYO_CONFIG_DISABLED || !path->mnt || !path->dentry) | |
a1f9bb6a TH |
754 | return 0; |
755 | idx = tomoyo_read_lock(); | |
c8c57e84 | 756 | if (!tomoyo_get_realpath(&buf, path)) |
a1f9bb6a | 757 | goto out; |
c8c57e84 TH |
758 | if (type == TOMOYO_TYPE_MKDIR) |
759 | tomoyo_add_slash(&buf); | |
cb917cf5 TH |
760 | r.param_type = TOMOYO_TYPE_PATH_NUMBER_ACL; |
761 | r.param.path_number.operation = type; | |
762 | r.param.path_number.filename = &buf; | |
763 | r.param.path_number.number = number; | |
764 | do { | |
765 | tomoyo_check_acl(&r, tomoyo_check_path_number_acl); | |
766 | error = tomoyo_audit_path_number_log(&r); | |
767 | } while (error == TOMOYO_RETRY_REQUEST); | |
c8c57e84 | 768 | kfree(buf.name); |
cb917cf5 | 769 | out: |
a1f9bb6a TH |
770 | tomoyo_read_unlock(idx); |
771 | if (r.mode != TOMOYO_CONFIG_ENFORCING) | |
772 | error = 0; | |
773 | return error; | |
774 | } | |
775 | ||
b69a54ee KT |
776 | /** |
777 | * tomoyo_check_open_permission - Check permission for "read" and "write". | |
778 | * | |
779 | * @domain: Pointer to "struct tomoyo_domain_info". | |
780 | * @path: Pointer to "struct path". | |
781 | * @flag: Flags for open(). | |
782 | * | |
783 | * Returns 0 on success, negative value otherwise. | |
784 | */ | |
785 | int tomoyo_check_open_permission(struct tomoyo_domain_info *domain, | |
786 | struct path *path, const int flag) | |
787 | { | |
788 | const u8 acc_mode = ACC_MODE(flag); | |
eae61f3c | 789 | int error = 0; |
c8c57e84 | 790 | struct tomoyo_path_info buf; |
cb0abe6a | 791 | struct tomoyo_request_info r; |
fdb8ebb7 | 792 | int idx; |
b69a54ee | 793 | |
7c75964f | 794 | if (!path->mnt) |
b69a54ee | 795 | return 0; |
57c2590f TH |
796 | buf.name = NULL; |
797 | r.mode = TOMOYO_CONFIG_DISABLED; | |
fdb8ebb7 | 798 | idx = tomoyo_read_lock(); |
7c75964f TH |
799 | if (acc_mode && |
800 | tomoyo_init_request_info(&r, domain, TOMOYO_MAC_FILE_OPEN) | |
57c2590f TH |
801 | != TOMOYO_CONFIG_DISABLED) { |
802 | if (!tomoyo_get_realpath(&buf, path)) { | |
803 | error = -ENOMEM; | |
804 | goto out; | |
805 | } | |
7c75964f TH |
806 | if (acc_mode & MAY_READ) |
807 | error = tomoyo_path_permission(&r, TOMOYO_TYPE_READ, | |
808 | &buf); | |
809 | if (!error && (acc_mode & MAY_WRITE)) | |
810 | error = tomoyo_path_permission(&r, (flag & O_APPEND) ? | |
811 | TOMOYO_TYPE_APPEND : | |
812 | TOMOYO_TYPE_WRITE, | |
57c2590f | 813 | &buf); |
57c2590f | 814 | } |
b69a54ee | 815 | out: |
c8c57e84 | 816 | kfree(buf.name); |
fdb8ebb7 | 817 | tomoyo_read_unlock(idx); |
cb0abe6a | 818 | if (r.mode != TOMOYO_CONFIG_ENFORCING) |
b69a54ee KT |
819 | error = 0; |
820 | return error; | |
821 | } | |
822 | ||
823 | /** | |
7c75964f | 824 | * tomoyo_path_perm - Check permission for "unlink", "rmdir", "truncate", "symlink", "append", "chroot" and "unmount". |
b69a54ee | 825 | * |
b69a54ee KT |
826 | * @operation: Type of operation. |
827 | * @path: Pointer to "struct path". | |
828 | * | |
829 | * Returns 0 on success, negative value otherwise. | |
830 | */ | |
97d6931e | 831 | int tomoyo_path_perm(const u8 operation, struct path *path) |
b69a54ee | 832 | { |
cb0abe6a | 833 | struct tomoyo_request_info r; |
7c75964f TH |
834 | int error; |
835 | struct tomoyo_path_info buf; | |
836 | bool is_enforce; | |
fdb8ebb7 | 837 | int idx; |
b69a54ee | 838 | |
57c2590f TH |
839 | if (!path->mnt) |
840 | return 0; | |
841 | if (tomoyo_init_request_info(&r, NULL, tomoyo_p2mac[operation]) | |
842 | == TOMOYO_CONFIG_DISABLED) | |
b69a54ee | 843 | return 0; |
7c75964f TH |
844 | is_enforce = (r.mode == TOMOYO_CONFIG_ENFORCING); |
845 | error = -ENOMEM; | |
57c2590f | 846 | buf.name = NULL; |
fdb8ebb7 | 847 | idx = tomoyo_read_lock(); |
c8c57e84 | 848 | if (!tomoyo_get_realpath(&buf, path)) |
b69a54ee KT |
849 | goto out; |
850 | switch (operation) { | |
7ef61233 TH |
851 | case TOMOYO_TYPE_RMDIR: |
852 | case TOMOYO_TYPE_CHROOT: | |
c8c57e84 TH |
853 | tomoyo_add_slash(&buf); |
854 | break; | |
b69a54ee | 855 | } |
c8c57e84 | 856 | error = tomoyo_path_permission(&r, operation, &buf); |
b69a54ee | 857 | out: |
c8c57e84 | 858 | kfree(buf.name); |
fdb8ebb7 | 859 | tomoyo_read_unlock(idx); |
7c75964f | 860 | if (!is_enforce) |
b69a54ee KT |
861 | error = 0; |
862 | return error; | |
863 | } | |
864 | ||
a1f9bb6a | 865 | /** |
75093152 | 866 | * tomoyo_mkdev_perm - Check permission for "mkblock" and "mkchar". |
a1f9bb6a TH |
867 | * |
868 | * @operation: Type of operation. (TOMOYO_TYPE_MKCHAR or TOMOYO_TYPE_MKBLOCK) | |
869 | * @path: Pointer to "struct path". | |
870 | * @mode: Create mode. | |
871 | * @dev: Device number. | |
872 | * | |
873 | * Returns 0 on success, negative value otherwise. | |
874 | */ | |
75093152 | 875 | int tomoyo_mkdev_perm(const u8 operation, struct path *path, |
0df7e8b8 | 876 | const unsigned int mode, unsigned int dev) |
a1f9bb6a TH |
877 | { |
878 | struct tomoyo_request_info r; | |
879 | int error = -ENOMEM; | |
c8c57e84 | 880 | struct tomoyo_path_info buf; |
a1f9bb6a TH |
881 | int idx; |
882 | ||
57c2590f TH |
883 | if (!path->mnt || |
884 | tomoyo_init_request_info(&r, NULL, tomoyo_pnnn2mac[operation]) | |
885 | == TOMOYO_CONFIG_DISABLED) | |
a1f9bb6a TH |
886 | return 0; |
887 | idx = tomoyo_read_lock(); | |
888 | error = -ENOMEM; | |
c8c57e84 | 889 | if (tomoyo_get_realpath(&buf, path)) { |
cf6e9a64 | 890 | dev = new_decode_dev(dev); |
75093152 | 891 | r.param_type = TOMOYO_TYPE_MKDEV_ACL; |
cf6e9a64 TH |
892 | r.param.mkdev.filename = &buf; |
893 | r.param.mkdev.operation = operation; | |
894 | r.param.mkdev.mode = mode; | |
895 | r.param.mkdev.major = MAJOR(dev); | |
896 | r.param.mkdev.minor = MINOR(dev); | |
99a85259 TH |
897 | tomoyo_check_acl(&r, tomoyo_check_mkdev_acl); |
898 | error = tomoyo_audit_mkdev_log(&r); | |
c8c57e84 | 899 | kfree(buf.name); |
a1f9bb6a TH |
900 | } |
901 | tomoyo_read_unlock(idx); | |
902 | if (r.mode != TOMOYO_CONFIG_ENFORCING) | |
903 | error = 0; | |
904 | return error; | |
905 | } | |
906 | ||
b69a54ee | 907 | /** |
7ef61233 | 908 | * tomoyo_path2_perm - Check permission for "rename", "link" and "pivot_root". |
b69a54ee | 909 | * |
b69a54ee KT |
910 | * @operation: Type of operation. |
911 | * @path1: Pointer to "struct path". | |
912 | * @path2: Pointer to "struct path". | |
913 | * | |
914 | * Returns 0 on success, negative value otherwise. | |
915 | */ | |
97d6931e | 916 | int tomoyo_path2_perm(const u8 operation, struct path *path1, |
7ef61233 | 917 | struct path *path2) |
b69a54ee KT |
918 | { |
919 | int error = -ENOMEM; | |
c8c57e84 TH |
920 | struct tomoyo_path_info buf1; |
921 | struct tomoyo_path_info buf2; | |
cb0abe6a | 922 | struct tomoyo_request_info r; |
fdb8ebb7 | 923 | int idx; |
b69a54ee | 924 | |
57c2590f TH |
925 | if (!path1->mnt || !path2->mnt || |
926 | tomoyo_init_request_info(&r, NULL, tomoyo_pp2mac[operation]) | |
927 | == TOMOYO_CONFIG_DISABLED) | |
b69a54ee | 928 | return 0; |
c8c57e84 TH |
929 | buf1.name = NULL; |
930 | buf2.name = NULL; | |
fdb8ebb7 | 931 | idx = tomoyo_read_lock(); |
c8c57e84 TH |
932 | if (!tomoyo_get_realpath(&buf1, path1) || |
933 | !tomoyo_get_realpath(&buf2, path2)) | |
b69a54ee | 934 | goto out; |
57c2590f TH |
935 | switch (operation) { |
936 | struct dentry *dentry; | |
937 | case TOMOYO_TYPE_RENAME: | |
938 | case TOMOYO_TYPE_LINK: | |
939 | dentry = path1->dentry; | |
940 | if (!dentry->d_inode || !S_ISDIR(dentry->d_inode->i_mode)) | |
941 | break; | |
942 | /* fall through */ | |
943 | case TOMOYO_TYPE_PIVOT_ROOT: | |
944 | tomoyo_add_slash(&buf1); | |
945 | tomoyo_add_slash(&buf2); | |
946 | break; | |
947 | } | |
cf6e9a64 TH |
948 | r.param_type = TOMOYO_TYPE_PATH2_ACL; |
949 | r.param.path2.operation = operation; | |
950 | r.param.path2.filename1 = &buf1; | |
951 | r.param.path2.filename2 = &buf2; | |
17fcfbd9 | 952 | do { |
99a85259 TH |
953 | tomoyo_check_acl(&r, tomoyo_check_path2_acl); |
954 | error = tomoyo_audit_path2_log(&r); | |
955 | } while (error == TOMOYO_RETRY_REQUEST); | |
b69a54ee | 956 | out: |
c8c57e84 TH |
957 | kfree(buf1.name); |
958 | kfree(buf2.name); | |
fdb8ebb7 | 959 | tomoyo_read_unlock(idx); |
cb0abe6a | 960 | if (r.mode != TOMOYO_CONFIG_ENFORCING) |
b69a54ee KT |
961 | error = 0; |
962 | return error; | |
963 | } | |
a1f9bb6a TH |
964 | |
965 | /** | |
e2bf6907 | 966 | * tomoyo_write_file - Update file related list. |
a1f9bb6a TH |
967 | * |
968 | * @data: String to parse. | |
969 | * @domain: Pointer to "struct tomoyo_domain_info". | |
970 | * @is_delete: True if it is a delete request. | |
971 | * | |
972 | * Returns 0 on success, negative value otherwise. | |
973 | * | |
974 | * Caller holds tomoyo_read_lock(). | |
975 | */ | |
e2bf6907 TH |
976 | int tomoyo_write_file(char *data, struct tomoyo_domain_info *domain, |
977 | const bool is_delete) | |
a1f9bb6a TH |
978 | { |
979 | char *w[5]; | |
980 | u8 type; | |
981 | if (!tomoyo_tokenize(data, w, sizeof(w)) || !w[1][0]) | |
982 | return -EINVAL; | |
237ab459 | 983 | if (strncmp(w[0], "allow_", 6)) |
a1f9bb6a | 984 | goto out; |
a1f9bb6a TH |
985 | w[0] += 6; |
986 | for (type = 0; type < TOMOYO_MAX_PATH_OPERATION; type++) { | |
987 | if (strcmp(w[0], tomoyo_path_keyword[type])) | |
988 | continue; | |
989 | return tomoyo_update_path_acl(type, w[1], domain, is_delete); | |
990 | } | |
991 | if (!w[2][0]) | |
992 | goto out; | |
993 | for (type = 0; type < TOMOYO_MAX_PATH2_OPERATION; type++) { | |
994 | if (strcmp(w[0], tomoyo_path2_keyword[type])) | |
995 | continue; | |
996 | return tomoyo_update_path2_acl(type, w[1], w[2], domain, | |
997 | is_delete); | |
998 | } | |
999 | for (type = 0; type < TOMOYO_MAX_PATH_NUMBER_OPERATION; type++) { | |
1000 | if (strcmp(w[0], tomoyo_path_number_keyword[type])) | |
1001 | continue; | |
1002 | return tomoyo_update_path_number_acl(type, w[1], w[2], domain, | |
1003 | is_delete); | |
1004 | } | |
1005 | if (!w[3][0] || !w[4][0]) | |
1006 | goto out; | |
75093152 TH |
1007 | for (type = 0; type < TOMOYO_MAX_MKDEV_OPERATION; type++) { |
1008 | if (strcmp(w[0], tomoyo_mkdev_keyword[type])) | |
a1f9bb6a | 1009 | continue; |
75093152 TH |
1010 | return tomoyo_update_mkdev_acl(type, w[1], w[2], w[3], |
1011 | w[4], domain, is_delete); | |
a1f9bb6a TH |
1012 | } |
1013 | out: | |
1014 | return -EINVAL; | |
1015 | } |