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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
b69a54ee KT |
2 | /* |
3 | * security/tomoyo/file.c | |
4 | * | |
0f2a55d5 | 5 | * Copyright (C) 2005-2011 NTT DATA CORPORATION |
b69a54ee KT |
6 | */ |
7 | ||
8 | #include "common.h" | |
5a0e3ad6 | 9 | #include <linux/slab.h> |
b69a54ee | 10 | |
0df7e8b8 TH |
11 | /* |
12 | * Mapping table from "enum tomoyo_path_acl_index" to "enum tomoyo_mac_index". | |
13 | */ | |
57c2590f | 14 | static const u8 tomoyo_p2mac[TOMOYO_MAX_PATH_OPERATION] = { |
57c2590f TH |
15 | [TOMOYO_TYPE_EXECUTE] = TOMOYO_MAC_FILE_EXECUTE, |
16 | [TOMOYO_TYPE_READ] = TOMOYO_MAC_FILE_OPEN, | |
17 | [TOMOYO_TYPE_WRITE] = TOMOYO_MAC_FILE_OPEN, | |
7c75964f | 18 | [TOMOYO_TYPE_APPEND] = TOMOYO_MAC_FILE_OPEN, |
57c2590f | 19 | [TOMOYO_TYPE_UNLINK] = TOMOYO_MAC_FILE_UNLINK, |
7c75964f | 20 | [TOMOYO_TYPE_GETATTR] = TOMOYO_MAC_FILE_GETATTR, |
57c2590f TH |
21 | [TOMOYO_TYPE_RMDIR] = TOMOYO_MAC_FILE_RMDIR, |
22 | [TOMOYO_TYPE_TRUNCATE] = TOMOYO_MAC_FILE_TRUNCATE, | |
23 | [TOMOYO_TYPE_SYMLINK] = TOMOYO_MAC_FILE_SYMLINK, | |
57c2590f TH |
24 | [TOMOYO_TYPE_CHROOT] = TOMOYO_MAC_FILE_CHROOT, |
25 | [TOMOYO_TYPE_UMOUNT] = TOMOYO_MAC_FILE_UMOUNT, | |
26 | }; | |
27 | ||
0df7e8b8 TH |
28 | /* |
29 | * Mapping table from "enum tomoyo_mkdev_acl_index" to "enum tomoyo_mac_index". | |
30 | */ | |
0d2171d7 | 31 | const u8 tomoyo_pnnn2mac[TOMOYO_MAX_MKDEV_OPERATION] = { |
57c2590f TH |
32 | [TOMOYO_TYPE_MKBLOCK] = TOMOYO_MAC_FILE_MKBLOCK, |
33 | [TOMOYO_TYPE_MKCHAR] = TOMOYO_MAC_FILE_MKCHAR, | |
34 | }; | |
35 | ||
0df7e8b8 TH |
36 | /* |
37 | * Mapping table from "enum tomoyo_path2_acl_index" to "enum tomoyo_mac_index". | |
38 | */ | |
0d2171d7 | 39 | const u8 tomoyo_pp2mac[TOMOYO_MAX_PATH2_OPERATION] = { |
57c2590f TH |
40 | [TOMOYO_TYPE_LINK] = TOMOYO_MAC_FILE_LINK, |
41 | [TOMOYO_TYPE_RENAME] = TOMOYO_MAC_FILE_RENAME, | |
42 | [TOMOYO_TYPE_PIVOT_ROOT] = TOMOYO_MAC_FILE_PIVOT_ROOT, | |
43 | }; | |
44 | ||
0df7e8b8 TH |
45 | /* |
46 | * Mapping table from "enum tomoyo_path_number_acl_index" to | |
47 | * "enum tomoyo_mac_index". | |
48 | */ | |
0d2171d7 | 49 | const u8 tomoyo_pn2mac[TOMOYO_MAX_PATH_NUMBER_OPERATION] = { |
57c2590f TH |
50 | [TOMOYO_TYPE_CREATE] = TOMOYO_MAC_FILE_CREATE, |
51 | [TOMOYO_TYPE_MKDIR] = TOMOYO_MAC_FILE_MKDIR, | |
52 | [TOMOYO_TYPE_MKFIFO] = TOMOYO_MAC_FILE_MKFIFO, | |
53 | [TOMOYO_TYPE_MKSOCK] = TOMOYO_MAC_FILE_MKSOCK, | |
54 | [TOMOYO_TYPE_IOCTL] = TOMOYO_MAC_FILE_IOCTL, | |
55 | [TOMOYO_TYPE_CHMOD] = TOMOYO_MAC_FILE_CHMOD, | |
56 | [TOMOYO_TYPE_CHOWN] = TOMOYO_MAC_FILE_CHOWN, | |
57 | [TOMOYO_TYPE_CHGRP] = TOMOYO_MAC_FILE_CHGRP, | |
58 | }; | |
59 | ||
0df7e8b8 TH |
60 | /** |
61 | * tomoyo_put_name_union - Drop reference on "struct tomoyo_name_union". | |
62 | * | |
63 | * @ptr: Pointer to "struct tomoyo_name_union". | |
64 | * | |
65 | * Returns nothing. | |
66 | */ | |
7762fbff TH |
67 | void tomoyo_put_name_union(struct tomoyo_name_union *ptr) |
68 | { | |
0df7e8b8 TH |
69 | tomoyo_put_group(ptr->group); |
70 | tomoyo_put_name(ptr->filename); | |
7762fbff TH |
71 | } |
72 | ||
0df7e8b8 TH |
73 | /** |
74 | * tomoyo_compare_name_union - Check whether a name matches "struct tomoyo_name_union" or not. | |
75 | * | |
76 | * @name: Pointer to "struct tomoyo_path_info". | |
77 | * @ptr: Pointer to "struct tomoyo_name_union". | |
78 | * | |
79 | * Returns "struct tomoyo_path_info" if @name matches @ptr, NULL otherwise. | |
80 | */ | |
484ca79c TH |
81 | const struct tomoyo_path_info * |
82 | tomoyo_compare_name_union(const struct tomoyo_path_info *name, | |
83 | const struct tomoyo_name_union *ptr) | |
7762fbff | 84 | { |
0df7e8b8 | 85 | if (ptr->group) |
3f629636 | 86 | return tomoyo_path_matches_group(name, ptr->group); |
484ca79c TH |
87 | if (tomoyo_path_matches_pattern(name, ptr->filename)) |
88 | return ptr->filename; | |
89 | return NULL; | |
7762fbff TH |
90 | } |
91 | ||
0df7e8b8 TH |
92 | /** |
93 | * tomoyo_put_number_union - Drop reference on "struct tomoyo_number_union". | |
94 | * | |
95 | * @ptr: Pointer to "struct tomoyo_number_union". | |
96 | * | |
97 | * Returns nothing. | |
98 | */ | |
4c3e9e2d TH |
99 | void tomoyo_put_number_union(struct tomoyo_number_union *ptr) |
100 | { | |
0df7e8b8 | 101 | tomoyo_put_group(ptr->group); |
4c3e9e2d TH |
102 | } |
103 | ||
0df7e8b8 TH |
104 | /** |
105 | * tomoyo_compare_number_union - Check whether a value matches "struct tomoyo_number_union" or not. | |
106 | * | |
107 | * @value: Number to check. | |
108 | * @ptr: Pointer to "struct tomoyo_number_union". | |
109 | * | |
110 | * Returns true if @value matches @ptr, false otherwise. | |
111 | */ | |
4c3e9e2d TH |
112 | bool tomoyo_compare_number_union(const unsigned long value, |
113 | const struct tomoyo_number_union *ptr) | |
114 | { | |
0df7e8b8 | 115 | if (ptr->group) |
4c3e9e2d TH |
116 | return tomoyo_number_matches_group(value, value, ptr->group); |
117 | return value >= ptr->values[0] && value <= ptr->values[1]; | |
118 | } | |
119 | ||
0df7e8b8 TH |
120 | /** |
121 | * tomoyo_add_slash - Add trailing '/' if needed. | |
122 | * | |
123 | * @buf: Pointer to "struct tomoyo_path_info". | |
124 | * | |
125 | * Returns nothing. | |
126 | * | |
127 | * @buf must be generated by tomoyo_encode() because this function does not | |
128 | * allocate memory for adding '/'. | |
129 | */ | |
c8c57e84 TH |
130 | static void tomoyo_add_slash(struct tomoyo_path_info *buf) |
131 | { | |
132 | if (buf->is_dir) | |
133 | return; | |
134 | /* | |
135 | * This is OK because tomoyo_encode() reserves space for appending "/". | |
136 | */ | |
137 | strcat((char *) buf->name, "/"); | |
138 | tomoyo_fill_path_info(buf); | |
139 | } | |
140 | ||
b69a54ee | 141 | /** |
c8c57e84 | 142 | * tomoyo_get_realpath - Get realpath. |
b69a54ee | 143 | * |
c8c57e84 | 144 | * @buf: Pointer to "struct tomoyo_path_info". |
b69a54ee KT |
145 | * @path: Pointer to "struct path". |
146 | * | |
c8c57e84 | 147 | * Returns true on success, false otherwise. |
b69a54ee | 148 | */ |
3f7036a0 | 149 | static bool tomoyo_get_realpath(struct tomoyo_path_info *buf, const struct path *path) |
b69a54ee | 150 | { |
c8c57e84 TH |
151 | buf->name = tomoyo_realpath_from_path(path); |
152 | if (buf->name) { | |
153 | tomoyo_fill_path_info(buf); | |
154 | return true; | |
b69a54ee | 155 | } |
0f2a55d5 | 156 | return false; |
b69a54ee KT |
157 | } |
158 | ||
99a85259 TH |
159 | /** |
160 | * tomoyo_audit_path_log - Audit path request log. | |
161 | * | |
162 | * @r: Pointer to "struct tomoyo_request_info". | |
163 | * | |
164 | * Returns 0 on success, negative value otherwise. | |
165 | */ | |
166 | static int tomoyo_audit_path_log(struct tomoyo_request_info *r) | |
167 | { | |
eadd99cc TH |
168 | return tomoyo_supervisor(r, "file %s %s\n", tomoyo_path_keyword |
169 | [r->param.path.operation], | |
170 | r->param.path.filename->name); | |
99a85259 TH |
171 | } |
172 | ||
173 | /** | |
174 | * tomoyo_audit_path2_log - Audit path/path request log. | |
175 | * | |
176 | * @r: Pointer to "struct tomoyo_request_info". | |
177 | * | |
178 | * Returns 0 on success, negative value otherwise. | |
179 | */ | |
180 | static int tomoyo_audit_path2_log(struct tomoyo_request_info *r) | |
181 | { | |
2c47ab93 TH |
182 | return tomoyo_supervisor(r, "file %s %s %s\n", tomoyo_mac_keywords |
183 | [tomoyo_pp2mac[r->param.path2.operation]], | |
eadd99cc TH |
184 | r->param.path2.filename1->name, |
185 | r->param.path2.filename2->name); | |
99a85259 TH |
186 | } |
187 | ||
188 | /** | |
189 | * tomoyo_audit_mkdev_log - Audit path/number/number/number request log. | |
190 | * | |
191 | * @r: Pointer to "struct tomoyo_request_info". | |
192 | * | |
193 | * Returns 0 on success, negative value otherwise. | |
194 | */ | |
195 | static int tomoyo_audit_mkdev_log(struct tomoyo_request_info *r) | |
196 | { | |
eadd99cc | 197 | return tomoyo_supervisor(r, "file %s %s 0%o %u %u\n", |
2c47ab93 TH |
198 | tomoyo_mac_keywords |
199 | [tomoyo_pnnn2mac[r->param.mkdev.operation]], | |
eadd99cc TH |
200 | r->param.mkdev.filename->name, |
201 | r->param.mkdev.mode, r->param.mkdev.major, | |
202 | r->param.mkdev.minor); | |
99a85259 TH |
203 | } |
204 | ||
205 | /** | |
206 | * tomoyo_audit_path_number_log - Audit path/number request log. | |
207 | * | |
b5bc60b4 | 208 | * @r: Pointer to "struct tomoyo_request_info". |
99a85259 TH |
209 | * |
210 | * Returns 0 on success, negative value otherwise. | |
211 | */ | |
212 | static int tomoyo_audit_path_number_log(struct tomoyo_request_info *r) | |
213 | { | |
214 | const u8 type = r->param.path_number.operation; | |
215 | u8 radix; | |
99a85259 | 216 | char buffer[64]; |
99a85259 TH |
217 | switch (type) { |
218 | case TOMOYO_TYPE_CREATE: | |
219 | case TOMOYO_TYPE_MKDIR: | |
220 | case TOMOYO_TYPE_MKFIFO: | |
221 | case TOMOYO_TYPE_MKSOCK: | |
222 | case TOMOYO_TYPE_CHMOD: | |
223 | radix = TOMOYO_VALUE_TYPE_OCTAL; | |
224 | break; | |
225 | case TOMOYO_TYPE_IOCTL: | |
226 | radix = TOMOYO_VALUE_TYPE_HEXADECIMAL; | |
227 | break; | |
228 | default: | |
229 | radix = TOMOYO_VALUE_TYPE_DECIMAL; | |
230 | break; | |
231 | } | |
232 | tomoyo_print_ulong(buffer, sizeof(buffer), r->param.path_number.number, | |
233 | radix); | |
2c47ab93 TH |
234 | return tomoyo_supervisor(r, "file %s %s %s\n", tomoyo_mac_keywords |
235 | [tomoyo_pn2mac[type]], | |
eadd99cc | 236 | r->param.path_number.filename->name, buffer); |
b69a54ee KT |
237 | } |
238 | ||
0df7e8b8 TH |
239 | /** |
240 | * tomoyo_check_path_acl - Check permission for path operation. | |
241 | * | |
242 | * @r: Pointer to "struct tomoyo_request_info". | |
243 | * @ptr: Pointer to "struct tomoyo_acl_info". | |
244 | * | |
245 | * Returns true if granted, false otherwise. | |
246 | * | |
247 | * To be able to use wildcard for domain transition, this function sets | |
248 | * matching entry on success. Since the caller holds tomoyo_read_lock(), | |
249 | * it is safe to set matching entry. | |
250 | */ | |
484ca79c | 251 | static bool tomoyo_check_path_acl(struct tomoyo_request_info *r, |
99a85259 | 252 | const struct tomoyo_acl_info *ptr) |
b69a54ee | 253 | { |
99a85259 TH |
254 | const struct tomoyo_path_acl *acl = container_of(ptr, typeof(*acl), |
255 | head); | |
484ca79c TH |
256 | if (acl->perm & (1 << r->param.path.operation)) { |
257 | r->param.path.matched_path = | |
258 | tomoyo_compare_name_union(r->param.path.filename, | |
259 | &acl->name); | |
260 | return r->param.path.matched_path != NULL; | |
261 | } | |
262 | return false; | |
99a85259 | 263 | } |
b69a54ee | 264 | |
0df7e8b8 TH |
265 | /** |
266 | * tomoyo_check_path_number_acl - Check permission for path number operation. | |
267 | * | |
268 | * @r: Pointer to "struct tomoyo_request_info". | |
269 | * @ptr: Pointer to "struct tomoyo_acl_info". | |
270 | * | |
271 | * Returns true if granted, false otherwise. | |
272 | */ | |
484ca79c | 273 | static bool tomoyo_check_path_number_acl(struct tomoyo_request_info *r, |
99a85259 TH |
274 | const struct tomoyo_acl_info *ptr) |
275 | { | |
276 | const struct tomoyo_path_number_acl *acl = | |
277 | container_of(ptr, typeof(*acl), head); | |
278 | return (acl->perm & (1 << r->param.path_number.operation)) && | |
279 | tomoyo_compare_number_union(r->param.path_number.number, | |
280 | &acl->number) && | |
281 | tomoyo_compare_name_union(r->param.path_number.filename, | |
282 | &acl->name); | |
283 | } | |
284 | ||
0df7e8b8 TH |
285 | /** |
286 | * tomoyo_check_path2_acl - Check permission for path path operation. | |
287 | * | |
288 | * @r: Pointer to "struct tomoyo_request_info". | |
289 | * @ptr: Pointer to "struct tomoyo_acl_info". | |
290 | * | |
291 | * Returns true if granted, false otherwise. | |
292 | */ | |
484ca79c | 293 | static bool tomoyo_check_path2_acl(struct tomoyo_request_info *r, |
99a85259 TH |
294 | const struct tomoyo_acl_info *ptr) |
295 | { | |
296 | const struct tomoyo_path2_acl *acl = | |
297 | container_of(ptr, typeof(*acl), head); | |
298 | return (acl->perm & (1 << r->param.path2.operation)) && | |
299 | tomoyo_compare_name_union(r->param.path2.filename1, &acl->name1) | |
300 | && tomoyo_compare_name_union(r->param.path2.filename2, | |
301 | &acl->name2); | |
302 | } | |
303 | ||
0df7e8b8 TH |
304 | /** |
305 | * tomoyo_check_mkdev_acl - Check permission for path number number number operation. | |
306 | * | |
307 | * @r: Pointer to "struct tomoyo_request_info". | |
308 | * @ptr: Pointer to "struct tomoyo_acl_info". | |
309 | * | |
310 | * Returns true if granted, false otherwise. | |
311 | */ | |
484ca79c | 312 | static bool tomoyo_check_mkdev_acl(struct tomoyo_request_info *r, |
0df7e8b8 | 313 | const struct tomoyo_acl_info *ptr) |
99a85259 | 314 | { |
75093152 | 315 | const struct tomoyo_mkdev_acl *acl = |
99a85259 TH |
316 | container_of(ptr, typeof(*acl), head); |
317 | return (acl->perm & (1 << r->param.mkdev.operation)) && | |
318 | tomoyo_compare_number_union(r->param.mkdev.mode, | |
319 | &acl->mode) && | |
320 | tomoyo_compare_number_union(r->param.mkdev.major, | |
321 | &acl->major) && | |
322 | tomoyo_compare_number_union(r->param.mkdev.minor, | |
323 | &acl->minor) && | |
324 | tomoyo_compare_name_union(r->param.mkdev.filename, | |
325 | &acl->name); | |
b69a54ee KT |
326 | } |
327 | ||
0df7e8b8 TH |
328 | /** |
329 | * tomoyo_same_path_acl - Check for duplicated "struct tomoyo_path_acl" entry. | |
330 | * | |
331 | * @a: Pointer to "struct tomoyo_acl_info". | |
332 | * @b: Pointer to "struct tomoyo_acl_info". | |
333 | * | |
334 | * Returns true if @a == @b except permission bits, false otherwise. | |
335 | */ | |
237ab459 TH |
336 | static bool tomoyo_same_path_acl(const struct tomoyo_acl_info *a, |
337 | const struct tomoyo_acl_info *b) | |
338 | { | |
339 | const struct tomoyo_path_acl *p1 = container_of(a, typeof(*p1), head); | |
340 | const struct tomoyo_path_acl *p2 = container_of(b, typeof(*p2), head); | |
0df7e8b8 | 341 | return tomoyo_same_name_union(&p1->name, &p2->name); |
237ab459 TH |
342 | } |
343 | ||
7c75964f TH |
344 | /** |
345 | * tomoyo_merge_path_acl - Merge duplicated "struct tomoyo_path_acl" entry. | |
346 | * | |
347 | * @a: Pointer to "struct tomoyo_acl_info". | |
348 | * @b: Pointer to "struct tomoyo_acl_info". | |
349 | * @is_delete: True for @a &= ~@b, false for @a |= @b. | |
350 | * | |
351 | * Returns true if @a is empty, false otherwise. | |
352 | */ | |
237ab459 TH |
353 | static bool tomoyo_merge_path_acl(struct tomoyo_acl_info *a, |
354 | struct tomoyo_acl_info *b, | |
355 | const bool is_delete) | |
356 | { | |
357 | u16 * const a_perm = &container_of(a, struct tomoyo_path_acl, head) | |
358 | ->perm; | |
359 | u16 perm = *a_perm; | |
360 | const u16 b_perm = container_of(b, struct tomoyo_path_acl, head)->perm; | |
7c75964f | 361 | if (is_delete) |
237ab459 | 362 | perm &= ~b_perm; |
7c75964f | 363 | else |
237ab459 | 364 | perm |= b_perm; |
237ab459 TH |
365 | *a_perm = perm; |
366 | return !perm; | |
367 | } | |
368 | ||
b69a54ee | 369 | /** |
7ef61233 | 370 | * tomoyo_update_path_acl - Update "struct tomoyo_path_acl" list. |
b69a54ee | 371 | * |
a238cf5b TH |
372 | * @perm: Permission. |
373 | * @param: Pointer to "struct tomoyo_acl_param". | |
b69a54ee KT |
374 | * |
375 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
376 | * |
377 | * Caller holds tomoyo_read_lock(). | |
b69a54ee | 378 | */ |
a238cf5b TH |
379 | static int tomoyo_update_path_acl(const u16 perm, |
380 | struct tomoyo_acl_param *param) | |
b69a54ee | 381 | { |
9e4b50e9 TH |
382 | struct tomoyo_path_acl e = { |
383 | .head.type = TOMOYO_TYPE_PATH_ACL, | |
a238cf5b | 384 | .perm = perm |
9e4b50e9 | 385 | }; |
237ab459 | 386 | int error; |
a238cf5b TH |
387 | if (!tomoyo_parse_name_union(param, &e.name)) |
388 | error = -EINVAL; | |
389 | else | |
390 | error = tomoyo_update_domain(&e.head, sizeof(e), param, | |
391 | tomoyo_same_path_acl, | |
392 | tomoyo_merge_path_acl); | |
7762fbff | 393 | tomoyo_put_name_union(&e.name); |
b69a54ee KT |
394 | return error; |
395 | } | |
396 | ||
0df7e8b8 TH |
397 | /** |
398 | * tomoyo_same_mkdev_acl - Check for duplicated "struct tomoyo_mkdev_acl" entry. | |
399 | * | |
400 | * @a: Pointer to "struct tomoyo_acl_info". | |
401 | * @b: Pointer to "struct tomoyo_acl_info". | |
402 | * | |
403 | * Returns true if @a == @b except permission bits, false otherwise. | |
404 | */ | |
75093152 | 405 | static bool tomoyo_same_mkdev_acl(const struct tomoyo_acl_info *a, |
237ab459 TH |
406 | const struct tomoyo_acl_info *b) |
407 | { | |
0df7e8b8 TH |
408 | const struct tomoyo_mkdev_acl *p1 = container_of(a, typeof(*p1), head); |
409 | const struct tomoyo_mkdev_acl *p2 = container_of(b, typeof(*p2), head); | |
410 | return tomoyo_same_name_union(&p1->name, &p2->name) && | |
411 | tomoyo_same_number_union(&p1->mode, &p2->mode) && | |
412 | tomoyo_same_number_union(&p1->major, &p2->major) && | |
413 | tomoyo_same_number_union(&p1->minor, &p2->minor); | |
237ab459 TH |
414 | } |
415 | ||
0df7e8b8 TH |
416 | /** |
417 | * tomoyo_merge_mkdev_acl - Merge duplicated "struct tomoyo_mkdev_acl" entry. | |
418 | * | |
419 | * @a: Pointer to "struct tomoyo_acl_info". | |
420 | * @b: Pointer to "struct tomoyo_acl_info". | |
421 | * @is_delete: True for @a &= ~@b, false for @a |= @b. | |
422 | * | |
423 | * Returns true if @a is empty, false otherwise. | |
424 | */ | |
75093152 | 425 | static bool tomoyo_merge_mkdev_acl(struct tomoyo_acl_info *a, |
0df7e8b8 TH |
426 | struct tomoyo_acl_info *b, |
427 | const bool is_delete) | |
237ab459 | 428 | { |
75093152 | 429 | u8 *const a_perm = &container_of(a, struct tomoyo_mkdev_acl, |
237ab459 TH |
430 | head)->perm; |
431 | u8 perm = *a_perm; | |
75093152 | 432 | const u8 b_perm = container_of(b, struct tomoyo_mkdev_acl, head) |
237ab459 TH |
433 | ->perm; |
434 | if (is_delete) | |
435 | perm &= ~b_perm; | |
436 | else | |
437 | perm |= b_perm; | |
438 | *a_perm = perm; | |
439 | return !perm; | |
440 | } | |
441 | ||
a1f9bb6a | 442 | /** |
75093152 | 443 | * tomoyo_update_mkdev_acl - Update "struct tomoyo_mkdev_acl" list. |
a1f9bb6a | 444 | * |
a238cf5b TH |
445 | * @perm: Permission. |
446 | * @param: Pointer to "struct tomoyo_acl_param". | |
a1f9bb6a TH |
447 | * |
448 | * Returns 0 on success, negative value otherwise. | |
237ab459 TH |
449 | * |
450 | * Caller holds tomoyo_read_lock(). | |
a1f9bb6a | 451 | */ |
a238cf5b TH |
452 | static int tomoyo_update_mkdev_acl(const u8 perm, |
453 | struct tomoyo_acl_param *param) | |
a1f9bb6a | 454 | { |
75093152 TH |
455 | struct tomoyo_mkdev_acl e = { |
456 | .head.type = TOMOYO_TYPE_MKDEV_ACL, | |
a238cf5b | 457 | .perm = perm |
a1f9bb6a | 458 | }; |
a238cf5b TH |
459 | int error; |
460 | if (!tomoyo_parse_name_union(param, &e.name) || | |
461 | !tomoyo_parse_number_union(param, &e.mode) || | |
462 | !tomoyo_parse_number_union(param, &e.major) || | |
463 | !tomoyo_parse_number_union(param, &e.minor)) | |
464 | error = -EINVAL; | |
465 | else | |
466 | error = tomoyo_update_domain(&e.head, sizeof(e), param, | |
467 | tomoyo_same_mkdev_acl, | |
468 | tomoyo_merge_mkdev_acl); | |
a1f9bb6a TH |
469 | tomoyo_put_name_union(&e.name); |
470 | tomoyo_put_number_union(&e.mode); | |
471 | tomoyo_put_number_union(&e.major); | |
472 | tomoyo_put_number_union(&e.minor); | |
473 | return error; | |
474 | } | |
475 | ||
0df7e8b8 TH |
476 | /** |
477 | * tomoyo_same_path2_acl - Check for duplicated "struct tomoyo_path2_acl" entry. | |
478 | * | |
479 | * @a: Pointer to "struct tomoyo_acl_info". | |
480 | * @b: Pointer to "struct tomoyo_acl_info". | |
481 | * | |
482 | * Returns true if @a == @b except permission bits, false otherwise. | |
483 | */ | |
237ab459 TH |
484 | static bool tomoyo_same_path2_acl(const struct tomoyo_acl_info *a, |
485 | const struct tomoyo_acl_info *b) | |
486 | { | |
487 | const struct tomoyo_path2_acl *p1 = container_of(a, typeof(*p1), head); | |
488 | const struct tomoyo_path2_acl *p2 = container_of(b, typeof(*p2), head); | |
0df7e8b8 TH |
489 | return tomoyo_same_name_union(&p1->name1, &p2->name1) && |
490 | tomoyo_same_name_union(&p1->name2, &p2->name2); | |
237ab459 TH |
491 | } |
492 | ||
0df7e8b8 TH |
493 | /** |
494 | * tomoyo_merge_path2_acl - Merge duplicated "struct tomoyo_path2_acl" entry. | |
495 | * | |
496 | * @a: Pointer to "struct tomoyo_acl_info". | |
497 | * @b: Pointer to "struct tomoyo_acl_info". | |
498 | * @is_delete: True for @a &= ~@b, false for @a |= @b. | |
499 | * | |
500 | * Returns true if @a is empty, false otherwise. | |
501 | */ | |
237ab459 TH |
502 | static bool tomoyo_merge_path2_acl(struct tomoyo_acl_info *a, |
503 | struct tomoyo_acl_info *b, | |
504 | const bool is_delete) | |
505 | { | |
506 | u8 * const a_perm = &container_of(a, struct tomoyo_path2_acl, head) | |
507 | ->perm; | |
508 | u8 perm = *a_perm; | |
509 | const u8 b_perm = container_of(b, struct tomoyo_path2_acl, head)->perm; | |
510 | if (is_delete) | |
511 | perm &= ~b_perm; | |
512 | else | |
513 | perm |= b_perm; | |
514 | *a_perm = perm; | |
515 | return !perm; | |
516 | } | |
517 | ||
b69a54ee | 518 | /** |
7ef61233 | 519 | * tomoyo_update_path2_acl - Update "struct tomoyo_path2_acl" list. |
b69a54ee | 520 | * |
a238cf5b TH |
521 | * @perm: Permission. |
522 | * @param: Pointer to "struct tomoyo_acl_param". | |
b69a54ee KT |
523 | * |
524 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
525 | * |
526 | * Caller holds tomoyo_read_lock(). | |
b69a54ee | 527 | */ |
a238cf5b TH |
528 | static int tomoyo_update_path2_acl(const u8 perm, |
529 | struct tomoyo_acl_param *param) | |
b69a54ee | 530 | { |
9e4b50e9 TH |
531 | struct tomoyo_path2_acl e = { |
532 | .head.type = TOMOYO_TYPE_PATH2_ACL, | |
a238cf5b | 533 | .perm = perm |
9e4b50e9 | 534 | }; |
a238cf5b TH |
535 | int error; |
536 | if (!tomoyo_parse_name_union(param, &e.name1) || | |
537 | !tomoyo_parse_name_union(param, &e.name2)) | |
538 | error = -EINVAL; | |
539 | else | |
540 | error = tomoyo_update_domain(&e.head, sizeof(e), param, | |
541 | tomoyo_same_path2_acl, | |
542 | tomoyo_merge_path2_acl); | |
7762fbff TH |
543 | tomoyo_put_name_union(&e.name1); |
544 | tomoyo_put_name_union(&e.name2); | |
b69a54ee KT |
545 | return error; |
546 | } | |
547 | ||
b69a54ee | 548 | /** |
cb0abe6a | 549 | * tomoyo_path_permission - Check permission for single path operation. |
b69a54ee | 550 | * |
cb0abe6a | 551 | * @r: Pointer to "struct tomoyo_request_info". |
b69a54ee KT |
552 | * @operation: Type of operation. |
553 | * @filename: Filename to check. | |
b69a54ee KT |
554 | * |
555 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
556 | * |
557 | * Caller holds tomoyo_read_lock(). | |
b69a54ee | 558 | */ |
778c4a4d TH |
559 | static int tomoyo_path_permission(struct tomoyo_request_info *r, u8 operation, |
560 | const struct tomoyo_path_info *filename) | |
b69a54ee | 561 | { |
b69a54ee | 562 | int error; |
b69a54ee | 563 | |
57c2590f | 564 | r->type = tomoyo_p2mac[operation]; |
bd03a3e4 | 565 | r->mode = tomoyo_get_mode(r->domain->ns, r->profile, r->type); |
57c2590f TH |
566 | if (r->mode == TOMOYO_CONFIG_DISABLED) |
567 | return 0; | |
cf6e9a64 TH |
568 | r->param_type = TOMOYO_TYPE_PATH_ACL; |
569 | r->param.path.filename = filename; | |
570 | r->param.path.operation = operation; | |
17fcfbd9 | 571 | do { |
99a85259 | 572 | tomoyo_check_acl(r, tomoyo_check_path_acl); |
99a85259 | 573 | error = tomoyo_audit_path_log(r); |
6bce98ed | 574 | } while (error == TOMOYO_RETRY_REQUEST); |
b69a54ee KT |
575 | return error; |
576 | } | |
577 | ||
6bce98ed TH |
578 | /** |
579 | * tomoyo_execute_permission - Check permission for execute operation. | |
580 | * | |
581 | * @r: Pointer to "struct tomoyo_request_info". | |
582 | * @filename: Filename to check. | |
583 | * | |
584 | * Returns 0 on success, negative value otherwise. | |
585 | * | |
586 | * Caller holds tomoyo_read_lock(). | |
587 | */ | |
588 | int tomoyo_execute_permission(struct tomoyo_request_info *r, | |
589 | const struct tomoyo_path_info *filename) | |
590 | { | |
591 | /* | |
592 | * Unlike other permission checks, this check is done regardless of | |
593 | * profile mode settings in order to check for domain transition | |
594 | * preference. | |
595 | */ | |
596 | r->type = TOMOYO_MAC_FILE_EXECUTE; | |
597 | r->mode = tomoyo_get_mode(r->domain->ns, r->profile, r->type); | |
598 | r->param_type = TOMOYO_TYPE_PATH_ACL; | |
599 | r->param.path.filename = filename; | |
600 | r->param.path.operation = TOMOYO_TYPE_EXECUTE; | |
601 | tomoyo_check_acl(r, tomoyo_check_path_acl); | |
602 | r->ee->transition = r->matched_acl && r->matched_acl->cond ? | |
603 | r->matched_acl->cond->transit : NULL; | |
604 | if (r->mode != TOMOYO_CONFIG_DISABLED) | |
605 | return tomoyo_audit_path_log(r); | |
606 | return 0; | |
607 | } | |
608 | ||
0df7e8b8 TH |
609 | /** |
610 | * tomoyo_same_path_number_acl - Check for duplicated "struct tomoyo_path_number_acl" entry. | |
611 | * | |
612 | * @a: Pointer to "struct tomoyo_acl_info". | |
613 | * @b: Pointer to "struct tomoyo_acl_info". | |
614 | * | |
615 | * Returns true if @a == @b except permission bits, false otherwise. | |
616 | */ | |
237ab459 TH |
617 | static bool tomoyo_same_path_number_acl(const struct tomoyo_acl_info *a, |
618 | const struct tomoyo_acl_info *b) | |
619 | { | |
620 | const struct tomoyo_path_number_acl *p1 = container_of(a, typeof(*p1), | |
621 | head); | |
622 | const struct tomoyo_path_number_acl *p2 = container_of(b, typeof(*p2), | |
623 | head); | |
0df7e8b8 TH |
624 | return tomoyo_same_name_union(&p1->name, &p2->name) && |
625 | tomoyo_same_number_union(&p1->number, &p2->number); | |
237ab459 TH |
626 | } |
627 | ||
0df7e8b8 TH |
628 | /** |
629 | * tomoyo_merge_path_number_acl - Merge duplicated "struct tomoyo_path_number_acl" entry. | |
630 | * | |
631 | * @a: Pointer to "struct tomoyo_acl_info". | |
632 | * @b: Pointer to "struct tomoyo_acl_info". | |
633 | * @is_delete: True for @a &= ~@b, false for @a |= @b. | |
634 | * | |
635 | * Returns true if @a is empty, false otherwise. | |
636 | */ | |
237ab459 TH |
637 | static bool tomoyo_merge_path_number_acl(struct tomoyo_acl_info *a, |
638 | struct tomoyo_acl_info *b, | |
639 | const bool is_delete) | |
640 | { | |
641 | u8 * const a_perm = &container_of(a, struct tomoyo_path_number_acl, | |
642 | head)->perm; | |
643 | u8 perm = *a_perm; | |
644 | const u8 b_perm = container_of(b, struct tomoyo_path_number_acl, head) | |
645 | ->perm; | |
646 | if (is_delete) | |
647 | perm &= ~b_perm; | |
648 | else | |
649 | perm |= b_perm; | |
650 | *a_perm = perm; | |
651 | return !perm; | |
652 | } | |
653 | ||
a1f9bb6a TH |
654 | /** |
655 | * tomoyo_update_path_number_acl - Update ioctl/chmod/chown/chgrp ACL. | |
656 | * | |
a238cf5b TH |
657 | * @perm: Permission. |
658 | * @param: Pointer to "struct tomoyo_acl_param". | |
a1f9bb6a TH |
659 | * |
660 | * Returns 0 on success, negative value otherwise. | |
661 | */ | |
a238cf5b TH |
662 | static int tomoyo_update_path_number_acl(const u8 perm, |
663 | struct tomoyo_acl_param *param) | |
a1f9bb6a | 664 | { |
a1f9bb6a TH |
665 | struct tomoyo_path_number_acl e = { |
666 | .head.type = TOMOYO_TYPE_PATH_NUMBER_ACL, | |
a238cf5b | 667 | .perm = perm |
a1f9bb6a | 668 | }; |
a238cf5b TH |
669 | int error; |
670 | if (!tomoyo_parse_name_union(param, &e.name) || | |
671 | !tomoyo_parse_number_union(param, &e.number)) | |
672 | error = -EINVAL; | |
673 | else | |
674 | error = tomoyo_update_domain(&e.head, sizeof(e), param, | |
675 | tomoyo_same_path_number_acl, | |
676 | tomoyo_merge_path_number_acl); | |
a1f9bb6a TH |
677 | tomoyo_put_name_union(&e.name); |
678 | tomoyo_put_number_union(&e.number); | |
679 | return error; | |
680 | } | |
681 | ||
a1f9bb6a TH |
682 | /** |
683 | * tomoyo_path_number_perm - Check permission for "create", "mkdir", "mkfifo", "mksock", "ioctl", "chmod", "chown", "chgrp". | |
684 | * | |
685 | * @type: Type of operation. | |
686 | * @path: Pointer to "struct path". | |
687 | * @number: Number. | |
688 | * | |
689 | * Returns 0 on success, negative value otherwise. | |
690 | */ | |
e6641edd | 691 | int tomoyo_path_number_perm(const u8 type, const struct path *path, |
a1f9bb6a TH |
692 | unsigned long number) |
693 | { | |
694 | struct tomoyo_request_info r; | |
97fb35e4 | 695 | struct tomoyo_obj_info obj = { |
8291798d | 696 | .path1 = { .mnt = path->mnt, .dentry = path->dentry }, |
97fb35e4 | 697 | }; |
a1f9bb6a | 698 | int error = -ENOMEM; |
c8c57e84 | 699 | struct tomoyo_path_info buf; |
a1f9bb6a TH |
700 | int idx; |
701 | ||
57c2590f | 702 | if (tomoyo_init_request_info(&r, NULL, tomoyo_pn2mac[type]) |
5625f2e3 | 703 | == TOMOYO_CONFIG_DISABLED || !path->dentry) |
a1f9bb6a TH |
704 | return 0; |
705 | idx = tomoyo_read_lock(); | |
c8c57e84 | 706 | if (!tomoyo_get_realpath(&buf, path)) |
a1f9bb6a | 707 | goto out; |
97fb35e4 | 708 | r.obj = &obj; |
c8c57e84 TH |
709 | if (type == TOMOYO_TYPE_MKDIR) |
710 | tomoyo_add_slash(&buf); | |
cb917cf5 TH |
711 | r.param_type = TOMOYO_TYPE_PATH_NUMBER_ACL; |
712 | r.param.path_number.operation = type; | |
713 | r.param.path_number.filename = &buf; | |
714 | r.param.path_number.number = number; | |
715 | do { | |
716 | tomoyo_check_acl(&r, tomoyo_check_path_number_acl); | |
717 | error = tomoyo_audit_path_number_log(&r); | |
718 | } while (error == TOMOYO_RETRY_REQUEST); | |
c8c57e84 | 719 | kfree(buf.name); |
cb917cf5 | 720 | out: |
a1f9bb6a TH |
721 | tomoyo_read_unlock(idx); |
722 | if (r.mode != TOMOYO_CONFIG_ENFORCING) | |
723 | error = 0; | |
724 | return error; | |
725 | } | |
726 | ||
b69a54ee KT |
727 | /** |
728 | * tomoyo_check_open_permission - Check permission for "read" and "write". | |
729 | * | |
730 | * @domain: Pointer to "struct tomoyo_domain_info". | |
731 | * @path: Pointer to "struct path". | |
732 | * @flag: Flags for open(). | |
733 | * | |
734 | * Returns 0 on success, negative value otherwise. | |
735 | */ | |
736 | int tomoyo_check_open_permission(struct tomoyo_domain_info *domain, | |
e6641edd | 737 | const struct path *path, const int flag) |
b69a54ee KT |
738 | { |
739 | const u8 acc_mode = ACC_MODE(flag); | |
eae61f3c | 740 | int error = 0; |
c8c57e84 | 741 | struct tomoyo_path_info buf; |
cb0abe6a | 742 | struct tomoyo_request_info r; |
97fb35e4 | 743 | struct tomoyo_obj_info obj = { |
8291798d | 744 | .path1 = { .mnt = path->mnt, .dentry = path->dentry }, |
97fb35e4 | 745 | }; |
fdb8ebb7 | 746 | int idx; |
b69a54ee | 747 | |
57c2590f TH |
748 | buf.name = NULL; |
749 | r.mode = TOMOYO_CONFIG_DISABLED; | |
fdb8ebb7 | 750 | idx = tomoyo_read_lock(); |
7c75964f TH |
751 | if (acc_mode && |
752 | tomoyo_init_request_info(&r, domain, TOMOYO_MAC_FILE_OPEN) | |
57c2590f TH |
753 | != TOMOYO_CONFIG_DISABLED) { |
754 | if (!tomoyo_get_realpath(&buf, path)) { | |
755 | error = -ENOMEM; | |
756 | goto out; | |
757 | } | |
97fb35e4 | 758 | r.obj = &obj; |
7c75964f TH |
759 | if (acc_mode & MAY_READ) |
760 | error = tomoyo_path_permission(&r, TOMOYO_TYPE_READ, | |
761 | &buf); | |
762 | if (!error && (acc_mode & MAY_WRITE)) | |
763 | error = tomoyo_path_permission(&r, (flag & O_APPEND) ? | |
764 | TOMOYO_TYPE_APPEND : | |
765 | TOMOYO_TYPE_WRITE, | |
57c2590f | 766 | &buf); |
57c2590f | 767 | } |
b69a54ee | 768 | out: |
c8c57e84 | 769 | kfree(buf.name); |
fdb8ebb7 | 770 | tomoyo_read_unlock(idx); |
cb0abe6a | 771 | if (r.mode != TOMOYO_CONFIG_ENFORCING) |
b69a54ee KT |
772 | error = 0; |
773 | return error; | |
774 | } | |
775 | ||
776 | /** | |
7c75964f | 777 | * tomoyo_path_perm - Check permission for "unlink", "rmdir", "truncate", "symlink", "append", "chroot" and "unmount". |
b69a54ee | 778 | * |
b69a54ee KT |
779 | * @operation: Type of operation. |
780 | * @path: Pointer to "struct path". | |
97fb35e4 TH |
781 | * @target: Symlink's target if @operation is TOMOYO_TYPE_SYMLINK, |
782 | * NULL otherwise. | |
b69a54ee KT |
783 | * |
784 | * Returns 0 on success, negative value otherwise. | |
785 | */ | |
3f7036a0 | 786 | int tomoyo_path_perm(const u8 operation, const struct path *path, const char *target) |
b69a54ee | 787 | { |
cb0abe6a | 788 | struct tomoyo_request_info r; |
97fb35e4 | 789 | struct tomoyo_obj_info obj = { |
8291798d | 790 | .path1 = { .mnt = path->mnt, .dentry = path->dentry }, |
97fb35e4 | 791 | }; |
7c75964f TH |
792 | int error; |
793 | struct tomoyo_path_info buf; | |
794 | bool is_enforce; | |
97fb35e4 | 795 | struct tomoyo_path_info symlink_target; |
fdb8ebb7 | 796 | int idx; |
b69a54ee | 797 | |
57c2590f TH |
798 | if (tomoyo_init_request_info(&r, NULL, tomoyo_p2mac[operation]) |
799 | == TOMOYO_CONFIG_DISABLED) | |
b69a54ee | 800 | return 0; |
7c75964f TH |
801 | is_enforce = (r.mode == TOMOYO_CONFIG_ENFORCING); |
802 | error = -ENOMEM; | |
57c2590f | 803 | buf.name = NULL; |
fdb8ebb7 | 804 | idx = tomoyo_read_lock(); |
c8c57e84 | 805 | if (!tomoyo_get_realpath(&buf, path)) |
b69a54ee | 806 | goto out; |
97fb35e4 | 807 | r.obj = &obj; |
b69a54ee | 808 | switch (operation) { |
7ef61233 TH |
809 | case TOMOYO_TYPE_RMDIR: |
810 | case TOMOYO_TYPE_CHROOT: | |
c8c57e84 TH |
811 | tomoyo_add_slash(&buf); |
812 | break; | |
97fb35e4 TH |
813 | case TOMOYO_TYPE_SYMLINK: |
814 | symlink_target.name = tomoyo_encode(target); | |
815 | if (!symlink_target.name) | |
816 | goto out; | |
817 | tomoyo_fill_path_info(&symlink_target); | |
818 | obj.symlink_target = &symlink_target; | |
819 | break; | |
b69a54ee | 820 | } |
c8c57e84 | 821 | error = tomoyo_path_permission(&r, operation, &buf); |
97fb35e4 TH |
822 | if (operation == TOMOYO_TYPE_SYMLINK) |
823 | kfree(symlink_target.name); | |
b69a54ee | 824 | out: |
c8c57e84 | 825 | kfree(buf.name); |
fdb8ebb7 | 826 | tomoyo_read_unlock(idx); |
7c75964f | 827 | if (!is_enforce) |
b69a54ee KT |
828 | error = 0; |
829 | return error; | |
830 | } | |
831 | ||
a1f9bb6a | 832 | /** |
75093152 | 833 | * tomoyo_mkdev_perm - Check permission for "mkblock" and "mkchar". |
a1f9bb6a TH |
834 | * |
835 | * @operation: Type of operation. (TOMOYO_TYPE_MKCHAR or TOMOYO_TYPE_MKBLOCK) | |
836 | * @path: Pointer to "struct path". | |
837 | * @mode: Create mode. | |
838 | * @dev: Device number. | |
839 | * | |
840 | * Returns 0 on success, negative value otherwise. | |
841 | */ | |
e6641edd | 842 | int tomoyo_mkdev_perm(const u8 operation, const struct path *path, |
0df7e8b8 | 843 | const unsigned int mode, unsigned int dev) |
a1f9bb6a TH |
844 | { |
845 | struct tomoyo_request_info r; | |
97fb35e4 | 846 | struct tomoyo_obj_info obj = { |
8291798d | 847 | .path1 = { .mnt = path->mnt, .dentry = path->dentry }, |
97fb35e4 | 848 | }; |
a1f9bb6a | 849 | int error = -ENOMEM; |
c8c57e84 | 850 | struct tomoyo_path_info buf; |
a1f9bb6a TH |
851 | int idx; |
852 | ||
5625f2e3 | 853 | if (tomoyo_init_request_info(&r, NULL, tomoyo_pnnn2mac[operation]) |
57c2590f | 854 | == TOMOYO_CONFIG_DISABLED) |
a1f9bb6a TH |
855 | return 0; |
856 | idx = tomoyo_read_lock(); | |
857 | error = -ENOMEM; | |
c8c57e84 | 858 | if (tomoyo_get_realpath(&buf, path)) { |
97fb35e4 | 859 | r.obj = &obj; |
cf6e9a64 | 860 | dev = new_decode_dev(dev); |
75093152 | 861 | r.param_type = TOMOYO_TYPE_MKDEV_ACL; |
cf6e9a64 TH |
862 | r.param.mkdev.filename = &buf; |
863 | r.param.mkdev.operation = operation; | |
864 | r.param.mkdev.mode = mode; | |
865 | r.param.mkdev.major = MAJOR(dev); | |
866 | r.param.mkdev.minor = MINOR(dev); | |
99a85259 TH |
867 | tomoyo_check_acl(&r, tomoyo_check_mkdev_acl); |
868 | error = tomoyo_audit_mkdev_log(&r); | |
c8c57e84 | 869 | kfree(buf.name); |
a1f9bb6a TH |
870 | } |
871 | tomoyo_read_unlock(idx); | |
872 | if (r.mode != TOMOYO_CONFIG_ENFORCING) | |
873 | error = 0; | |
874 | return error; | |
875 | } | |
876 | ||
b69a54ee | 877 | /** |
7ef61233 | 878 | * tomoyo_path2_perm - Check permission for "rename", "link" and "pivot_root". |
b69a54ee | 879 | * |
b69a54ee KT |
880 | * @operation: Type of operation. |
881 | * @path1: Pointer to "struct path". | |
882 | * @path2: Pointer to "struct path". | |
883 | * | |
884 | * Returns 0 on success, negative value otherwise. | |
885 | */ | |
e6641edd AV |
886 | int tomoyo_path2_perm(const u8 operation, const struct path *path1, |
887 | const struct path *path2) | |
b69a54ee KT |
888 | { |
889 | int error = -ENOMEM; | |
c8c57e84 TH |
890 | struct tomoyo_path_info buf1; |
891 | struct tomoyo_path_info buf2; | |
cb0abe6a | 892 | struct tomoyo_request_info r; |
97fb35e4 | 893 | struct tomoyo_obj_info obj = { |
8291798d KC |
894 | .path1 = { .mnt = path1->mnt, .dentry = path1->dentry }, |
895 | .path2 = { .mnt = path2->mnt, .dentry = path2->dentry } | |
97fb35e4 | 896 | }; |
fdb8ebb7 | 897 | int idx; |
b69a54ee | 898 | |
5625f2e3 | 899 | if (tomoyo_init_request_info(&r, NULL, tomoyo_pp2mac[operation]) |
57c2590f | 900 | == TOMOYO_CONFIG_DISABLED) |
b69a54ee | 901 | return 0; |
c8c57e84 TH |
902 | buf1.name = NULL; |
903 | buf2.name = NULL; | |
fdb8ebb7 | 904 | idx = tomoyo_read_lock(); |
c8c57e84 TH |
905 | if (!tomoyo_get_realpath(&buf1, path1) || |
906 | !tomoyo_get_realpath(&buf2, path2)) | |
b69a54ee | 907 | goto out; |
57c2590f | 908 | switch (operation) { |
57c2590f | 909 | case TOMOYO_TYPE_RENAME: |
0f2a55d5 | 910 | case TOMOYO_TYPE_LINK: |
e656a8eb | 911 | if (!d_is_dir(path1->dentry)) |
0f2a55d5 TH |
912 | break; |
913 | /* fall through */ | |
914 | case TOMOYO_TYPE_PIVOT_ROOT: | |
915 | tomoyo_add_slash(&buf1); | |
916 | tomoyo_add_slash(&buf2); | |
57c2590f | 917 | break; |
0f2a55d5 | 918 | } |
97fb35e4 | 919 | r.obj = &obj; |
cf6e9a64 TH |
920 | r.param_type = TOMOYO_TYPE_PATH2_ACL; |
921 | r.param.path2.operation = operation; | |
922 | r.param.path2.filename1 = &buf1; | |
923 | r.param.path2.filename2 = &buf2; | |
17fcfbd9 | 924 | do { |
99a85259 TH |
925 | tomoyo_check_acl(&r, tomoyo_check_path2_acl); |
926 | error = tomoyo_audit_path2_log(&r); | |
927 | } while (error == TOMOYO_RETRY_REQUEST); | |
b69a54ee | 928 | out: |
c8c57e84 TH |
929 | kfree(buf1.name); |
930 | kfree(buf2.name); | |
fdb8ebb7 | 931 | tomoyo_read_unlock(idx); |
cb0abe6a | 932 | if (r.mode != TOMOYO_CONFIG_ENFORCING) |
b69a54ee KT |
933 | error = 0; |
934 | return error; | |
935 | } | |
a1f9bb6a | 936 | |
a238cf5b TH |
937 | /** |
938 | * tomoyo_same_mount_acl - Check for duplicated "struct tomoyo_mount_acl" entry. | |
939 | * | |
940 | * @a: Pointer to "struct tomoyo_acl_info". | |
941 | * @b: Pointer to "struct tomoyo_acl_info". | |
942 | * | |
943 | * Returns true if @a == @b, false otherwise. | |
944 | */ | |
945 | static bool tomoyo_same_mount_acl(const struct tomoyo_acl_info *a, | |
946 | const struct tomoyo_acl_info *b) | |
947 | { | |
948 | const struct tomoyo_mount_acl *p1 = container_of(a, typeof(*p1), head); | |
949 | const struct tomoyo_mount_acl *p2 = container_of(b, typeof(*p2), head); | |
950 | return tomoyo_same_name_union(&p1->dev_name, &p2->dev_name) && | |
951 | tomoyo_same_name_union(&p1->dir_name, &p2->dir_name) && | |
952 | tomoyo_same_name_union(&p1->fs_type, &p2->fs_type) && | |
953 | tomoyo_same_number_union(&p1->flags, &p2->flags); | |
954 | } | |
955 | ||
956 | /** | |
957 | * tomoyo_update_mount_acl - Write "struct tomoyo_mount_acl" list. | |
958 | * | |
959 | * @param: Pointer to "struct tomoyo_acl_param". | |
960 | * | |
961 | * Returns 0 on success, negative value otherwise. | |
962 | * | |
963 | * Caller holds tomoyo_read_lock(). | |
964 | */ | |
965 | static int tomoyo_update_mount_acl(struct tomoyo_acl_param *param) | |
966 | { | |
967 | struct tomoyo_mount_acl e = { .head.type = TOMOYO_TYPE_MOUNT_ACL }; | |
968 | int error; | |
969 | if (!tomoyo_parse_name_union(param, &e.dev_name) || | |
970 | !tomoyo_parse_name_union(param, &e.dir_name) || | |
971 | !tomoyo_parse_name_union(param, &e.fs_type) || | |
972 | !tomoyo_parse_number_union(param, &e.flags)) | |
973 | error = -EINVAL; | |
974 | else | |
975 | error = tomoyo_update_domain(&e.head, sizeof(e), param, | |
976 | tomoyo_same_mount_acl, NULL); | |
977 | tomoyo_put_name_union(&e.dev_name); | |
978 | tomoyo_put_name_union(&e.dir_name); | |
979 | tomoyo_put_name_union(&e.fs_type); | |
980 | tomoyo_put_number_union(&e.flags); | |
981 | return error; | |
982 | } | |
983 | ||
a1f9bb6a | 984 | /** |
e2bf6907 | 985 | * tomoyo_write_file - Update file related list. |
a1f9bb6a | 986 | * |
a238cf5b | 987 | * @param: Pointer to "struct tomoyo_acl_param". |
a1f9bb6a TH |
988 | * |
989 | * Returns 0 on success, negative value otherwise. | |
990 | * | |
991 | * Caller holds tomoyo_read_lock(). | |
992 | */ | |
a238cf5b | 993 | int tomoyo_write_file(struct tomoyo_acl_param *param) |
a1f9bb6a | 994 | { |
a238cf5b | 995 | u16 perm = 0; |
a1f9bb6a | 996 | u8 type; |
a238cf5b TH |
997 | const char *operation = tomoyo_read_token(param); |
998 | for (type = 0; type < TOMOYO_MAX_PATH_OPERATION; type++) | |
999 | if (tomoyo_permstr(operation, tomoyo_path_keyword[type])) | |
1000 | perm |= 1 << type; | |
1001 | if (perm) | |
1002 | return tomoyo_update_path_acl(perm, param); | |
1003 | for (type = 0; type < TOMOYO_MAX_PATH2_OPERATION; type++) | |
2c47ab93 TH |
1004 | if (tomoyo_permstr(operation, |
1005 | tomoyo_mac_keywords[tomoyo_pp2mac[type]])) | |
a238cf5b TH |
1006 | perm |= 1 << type; |
1007 | if (perm) | |
1008 | return tomoyo_update_path2_acl(perm, param); | |
1009 | for (type = 0; type < TOMOYO_MAX_PATH_NUMBER_OPERATION; type++) | |
1010 | if (tomoyo_permstr(operation, | |
2c47ab93 | 1011 | tomoyo_mac_keywords[tomoyo_pn2mac[type]])) |
a238cf5b TH |
1012 | perm |= 1 << type; |
1013 | if (perm) | |
1014 | return tomoyo_update_path_number_acl(perm, param); | |
1015 | for (type = 0; type < TOMOYO_MAX_MKDEV_OPERATION; type++) | |
2c47ab93 TH |
1016 | if (tomoyo_permstr(operation, |
1017 | tomoyo_mac_keywords[tomoyo_pnnn2mac[type]])) | |
a238cf5b TH |
1018 | perm |= 1 << type; |
1019 | if (perm) | |
1020 | return tomoyo_update_mkdev_acl(perm, param); | |
2c47ab93 TH |
1021 | if (tomoyo_permstr(operation, |
1022 | tomoyo_mac_keywords[TOMOYO_MAC_FILE_MOUNT])) | |
a238cf5b | 1023 | return tomoyo_update_mount_acl(param); |
a1f9bb6a TH |
1024 | return -EINVAL; |
1025 | } |