Commit | Line | Data |
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b69a54ee KT |
1 | /* |
2 | * security/tomoyo/file.c | |
3 | * | |
0f2a55d5 | 4 | * Copyright (C) 2005-2011 NTT DATA CORPORATION |
b69a54ee KT |
5 | */ |
6 | ||
7 | #include "common.h" | |
5a0e3ad6 | 8 | #include <linux/slab.h> |
b69a54ee | 9 | |
0df7e8b8 TH |
10 | /* |
11 | * Mapping table from "enum tomoyo_path_acl_index" to "enum tomoyo_mac_index". | |
12 | */ | |
57c2590f | 13 | static const u8 tomoyo_p2mac[TOMOYO_MAX_PATH_OPERATION] = { |
57c2590f TH |
14 | [TOMOYO_TYPE_EXECUTE] = TOMOYO_MAC_FILE_EXECUTE, |
15 | [TOMOYO_TYPE_READ] = TOMOYO_MAC_FILE_OPEN, | |
16 | [TOMOYO_TYPE_WRITE] = TOMOYO_MAC_FILE_OPEN, | |
7c75964f | 17 | [TOMOYO_TYPE_APPEND] = TOMOYO_MAC_FILE_OPEN, |
57c2590f | 18 | [TOMOYO_TYPE_UNLINK] = TOMOYO_MAC_FILE_UNLINK, |
7c75964f | 19 | [TOMOYO_TYPE_GETATTR] = TOMOYO_MAC_FILE_GETATTR, |
57c2590f TH |
20 | [TOMOYO_TYPE_RMDIR] = TOMOYO_MAC_FILE_RMDIR, |
21 | [TOMOYO_TYPE_TRUNCATE] = TOMOYO_MAC_FILE_TRUNCATE, | |
22 | [TOMOYO_TYPE_SYMLINK] = TOMOYO_MAC_FILE_SYMLINK, | |
57c2590f TH |
23 | [TOMOYO_TYPE_CHROOT] = TOMOYO_MAC_FILE_CHROOT, |
24 | [TOMOYO_TYPE_UMOUNT] = TOMOYO_MAC_FILE_UMOUNT, | |
25 | }; | |
26 | ||
0df7e8b8 TH |
27 | /* |
28 | * Mapping table from "enum tomoyo_mkdev_acl_index" to "enum tomoyo_mac_index". | |
29 | */ | |
0d2171d7 | 30 | const u8 tomoyo_pnnn2mac[TOMOYO_MAX_MKDEV_OPERATION] = { |
57c2590f TH |
31 | [TOMOYO_TYPE_MKBLOCK] = TOMOYO_MAC_FILE_MKBLOCK, |
32 | [TOMOYO_TYPE_MKCHAR] = TOMOYO_MAC_FILE_MKCHAR, | |
33 | }; | |
34 | ||
0df7e8b8 TH |
35 | /* |
36 | * Mapping table from "enum tomoyo_path2_acl_index" to "enum tomoyo_mac_index". | |
37 | */ | |
0d2171d7 | 38 | const u8 tomoyo_pp2mac[TOMOYO_MAX_PATH2_OPERATION] = { |
57c2590f TH |
39 | [TOMOYO_TYPE_LINK] = TOMOYO_MAC_FILE_LINK, |
40 | [TOMOYO_TYPE_RENAME] = TOMOYO_MAC_FILE_RENAME, | |
41 | [TOMOYO_TYPE_PIVOT_ROOT] = TOMOYO_MAC_FILE_PIVOT_ROOT, | |
42 | }; | |
43 | ||
0df7e8b8 TH |
44 | /* |
45 | * Mapping table from "enum tomoyo_path_number_acl_index" to | |
46 | * "enum tomoyo_mac_index". | |
47 | */ | |
0d2171d7 | 48 | const u8 tomoyo_pn2mac[TOMOYO_MAX_PATH_NUMBER_OPERATION] = { |
57c2590f TH |
49 | [TOMOYO_TYPE_CREATE] = TOMOYO_MAC_FILE_CREATE, |
50 | [TOMOYO_TYPE_MKDIR] = TOMOYO_MAC_FILE_MKDIR, | |
51 | [TOMOYO_TYPE_MKFIFO] = TOMOYO_MAC_FILE_MKFIFO, | |
52 | [TOMOYO_TYPE_MKSOCK] = TOMOYO_MAC_FILE_MKSOCK, | |
53 | [TOMOYO_TYPE_IOCTL] = TOMOYO_MAC_FILE_IOCTL, | |
54 | [TOMOYO_TYPE_CHMOD] = TOMOYO_MAC_FILE_CHMOD, | |
55 | [TOMOYO_TYPE_CHOWN] = TOMOYO_MAC_FILE_CHOWN, | |
56 | [TOMOYO_TYPE_CHGRP] = TOMOYO_MAC_FILE_CHGRP, | |
57 | }; | |
58 | ||
0df7e8b8 TH |
59 | /** |
60 | * tomoyo_put_name_union - Drop reference on "struct tomoyo_name_union". | |
61 | * | |
62 | * @ptr: Pointer to "struct tomoyo_name_union". | |
63 | * | |
64 | * Returns nothing. | |
65 | */ | |
7762fbff TH |
66 | void tomoyo_put_name_union(struct tomoyo_name_union *ptr) |
67 | { | |
0df7e8b8 TH |
68 | tomoyo_put_group(ptr->group); |
69 | tomoyo_put_name(ptr->filename); | |
7762fbff TH |
70 | } |
71 | ||
0df7e8b8 TH |
72 | /** |
73 | * tomoyo_compare_name_union - Check whether a name matches "struct tomoyo_name_union" or not. | |
74 | * | |
75 | * @name: Pointer to "struct tomoyo_path_info". | |
76 | * @ptr: Pointer to "struct tomoyo_name_union". | |
77 | * | |
78 | * Returns "struct tomoyo_path_info" if @name matches @ptr, NULL otherwise. | |
79 | */ | |
484ca79c TH |
80 | const struct tomoyo_path_info * |
81 | tomoyo_compare_name_union(const struct tomoyo_path_info *name, | |
82 | const struct tomoyo_name_union *ptr) | |
7762fbff | 83 | { |
0df7e8b8 | 84 | if (ptr->group) |
3f629636 | 85 | return tomoyo_path_matches_group(name, ptr->group); |
484ca79c TH |
86 | if (tomoyo_path_matches_pattern(name, ptr->filename)) |
87 | return ptr->filename; | |
88 | return NULL; | |
7762fbff TH |
89 | } |
90 | ||
0df7e8b8 TH |
91 | /** |
92 | * tomoyo_put_number_union - Drop reference on "struct tomoyo_number_union". | |
93 | * | |
94 | * @ptr: Pointer to "struct tomoyo_number_union". | |
95 | * | |
96 | * Returns nothing. | |
97 | */ | |
4c3e9e2d TH |
98 | void tomoyo_put_number_union(struct tomoyo_number_union *ptr) |
99 | { | |
0df7e8b8 | 100 | tomoyo_put_group(ptr->group); |
4c3e9e2d TH |
101 | } |
102 | ||
0df7e8b8 TH |
103 | /** |
104 | * tomoyo_compare_number_union - Check whether a value matches "struct tomoyo_number_union" or not. | |
105 | * | |
106 | * @value: Number to check. | |
107 | * @ptr: Pointer to "struct tomoyo_number_union". | |
108 | * | |
109 | * Returns true if @value matches @ptr, false otherwise. | |
110 | */ | |
4c3e9e2d TH |
111 | bool tomoyo_compare_number_union(const unsigned long value, |
112 | const struct tomoyo_number_union *ptr) | |
113 | { | |
0df7e8b8 | 114 | if (ptr->group) |
4c3e9e2d TH |
115 | return tomoyo_number_matches_group(value, value, ptr->group); |
116 | return value >= ptr->values[0] && value <= ptr->values[1]; | |
117 | } | |
118 | ||
0df7e8b8 TH |
119 | /** |
120 | * tomoyo_add_slash - Add trailing '/' if needed. | |
121 | * | |
122 | * @buf: Pointer to "struct tomoyo_path_info". | |
123 | * | |
124 | * Returns nothing. | |
125 | * | |
126 | * @buf must be generated by tomoyo_encode() because this function does not | |
127 | * allocate memory for adding '/'. | |
128 | */ | |
c8c57e84 TH |
129 | static void tomoyo_add_slash(struct tomoyo_path_info *buf) |
130 | { | |
131 | if (buf->is_dir) | |
132 | return; | |
133 | /* | |
134 | * This is OK because tomoyo_encode() reserves space for appending "/". | |
135 | */ | |
136 | strcat((char *) buf->name, "/"); | |
137 | tomoyo_fill_path_info(buf); | |
138 | } | |
139 | ||
b69a54ee | 140 | /** |
c8c57e84 | 141 | * tomoyo_get_realpath - Get realpath. |
b69a54ee | 142 | * |
c8c57e84 | 143 | * @buf: Pointer to "struct tomoyo_path_info". |
b69a54ee KT |
144 | * @path: Pointer to "struct path". |
145 | * | |
c8c57e84 | 146 | * Returns true on success, false otherwise. |
b69a54ee | 147 | */ |
c8c57e84 | 148 | static bool tomoyo_get_realpath(struct tomoyo_path_info *buf, struct path *path) |
b69a54ee | 149 | { |
c8c57e84 TH |
150 | buf->name = tomoyo_realpath_from_path(path); |
151 | if (buf->name) { | |
152 | tomoyo_fill_path_info(buf); | |
153 | return true; | |
b69a54ee | 154 | } |
0f2a55d5 | 155 | return false; |
b69a54ee KT |
156 | } |
157 | ||
99a85259 TH |
158 | /** |
159 | * tomoyo_audit_path_log - Audit path request log. | |
160 | * | |
161 | * @r: Pointer to "struct tomoyo_request_info". | |
162 | * | |
163 | * Returns 0 on success, negative value otherwise. | |
164 | */ | |
165 | static int tomoyo_audit_path_log(struct tomoyo_request_info *r) | |
166 | { | |
eadd99cc TH |
167 | return tomoyo_supervisor(r, "file %s %s\n", tomoyo_path_keyword |
168 | [r->param.path.operation], | |
169 | r->param.path.filename->name); | |
99a85259 TH |
170 | } |
171 | ||
172 | /** | |
173 | * tomoyo_audit_path2_log - Audit path/path request log. | |
174 | * | |
175 | * @r: Pointer to "struct tomoyo_request_info". | |
176 | * | |
177 | * Returns 0 on success, negative value otherwise. | |
178 | */ | |
179 | static int tomoyo_audit_path2_log(struct tomoyo_request_info *r) | |
180 | { | |
2c47ab93 TH |
181 | return tomoyo_supervisor(r, "file %s %s %s\n", tomoyo_mac_keywords |
182 | [tomoyo_pp2mac[r->param.path2.operation]], | |
eadd99cc TH |
183 | r->param.path2.filename1->name, |
184 | r->param.path2.filename2->name); | |
99a85259 TH |
185 | } |
186 | ||
187 | /** | |
188 | * tomoyo_audit_mkdev_log - Audit path/number/number/number request log. | |
189 | * | |
190 | * @r: Pointer to "struct tomoyo_request_info". | |
191 | * | |
192 | * Returns 0 on success, negative value otherwise. | |
193 | */ | |
194 | static int tomoyo_audit_mkdev_log(struct tomoyo_request_info *r) | |
195 | { | |
eadd99cc | 196 | return tomoyo_supervisor(r, "file %s %s 0%o %u %u\n", |
2c47ab93 TH |
197 | tomoyo_mac_keywords |
198 | [tomoyo_pnnn2mac[r->param.mkdev.operation]], | |
eadd99cc TH |
199 | r->param.mkdev.filename->name, |
200 | r->param.mkdev.mode, r->param.mkdev.major, | |
201 | r->param.mkdev.minor); | |
99a85259 TH |
202 | } |
203 | ||
204 | /** | |
205 | * tomoyo_audit_path_number_log - Audit path/number request log. | |
206 | * | |
b5bc60b4 | 207 | * @r: Pointer to "struct tomoyo_request_info". |
99a85259 TH |
208 | * |
209 | * Returns 0 on success, negative value otherwise. | |
210 | */ | |
211 | static int tomoyo_audit_path_number_log(struct tomoyo_request_info *r) | |
212 | { | |
213 | const u8 type = r->param.path_number.operation; | |
214 | u8 radix; | |
99a85259 | 215 | char buffer[64]; |
99a85259 TH |
216 | switch (type) { |
217 | case TOMOYO_TYPE_CREATE: | |
218 | case TOMOYO_TYPE_MKDIR: | |
219 | case TOMOYO_TYPE_MKFIFO: | |
220 | case TOMOYO_TYPE_MKSOCK: | |
221 | case TOMOYO_TYPE_CHMOD: | |
222 | radix = TOMOYO_VALUE_TYPE_OCTAL; | |
223 | break; | |
224 | case TOMOYO_TYPE_IOCTL: | |
225 | radix = TOMOYO_VALUE_TYPE_HEXADECIMAL; | |
226 | break; | |
227 | default: | |
228 | radix = TOMOYO_VALUE_TYPE_DECIMAL; | |
229 | break; | |
230 | } | |
231 | tomoyo_print_ulong(buffer, sizeof(buffer), r->param.path_number.number, | |
232 | radix); | |
2c47ab93 TH |
233 | return tomoyo_supervisor(r, "file %s %s %s\n", tomoyo_mac_keywords |
234 | [tomoyo_pn2mac[type]], | |
eadd99cc | 235 | r->param.path_number.filename->name, buffer); |
b69a54ee KT |
236 | } |
237 | ||
0df7e8b8 TH |
238 | /** |
239 | * tomoyo_check_path_acl - Check permission for path operation. | |
240 | * | |
241 | * @r: Pointer to "struct tomoyo_request_info". | |
242 | * @ptr: Pointer to "struct tomoyo_acl_info". | |
243 | * | |
244 | * Returns true if granted, false otherwise. | |
245 | * | |
246 | * To be able to use wildcard for domain transition, this function sets | |
247 | * matching entry on success. Since the caller holds tomoyo_read_lock(), | |
248 | * it is safe to set matching entry. | |
249 | */ | |
484ca79c | 250 | static bool tomoyo_check_path_acl(struct tomoyo_request_info *r, |
99a85259 | 251 | const struct tomoyo_acl_info *ptr) |
b69a54ee | 252 | { |
99a85259 TH |
253 | const struct tomoyo_path_acl *acl = container_of(ptr, typeof(*acl), |
254 | head); | |
484ca79c TH |
255 | if (acl->perm & (1 << r->param.path.operation)) { |
256 | r->param.path.matched_path = | |
257 | tomoyo_compare_name_union(r->param.path.filename, | |
258 | &acl->name); | |
259 | return r->param.path.matched_path != NULL; | |
260 | } | |
261 | return false; | |
99a85259 | 262 | } |
b69a54ee | 263 | |
0df7e8b8 TH |
264 | /** |
265 | * tomoyo_check_path_number_acl - Check permission for path number operation. | |
266 | * | |
267 | * @r: Pointer to "struct tomoyo_request_info". | |
268 | * @ptr: Pointer to "struct tomoyo_acl_info". | |
269 | * | |
270 | * Returns true if granted, false otherwise. | |
271 | */ | |
484ca79c | 272 | static bool tomoyo_check_path_number_acl(struct tomoyo_request_info *r, |
99a85259 TH |
273 | const struct tomoyo_acl_info *ptr) |
274 | { | |
275 | const struct tomoyo_path_number_acl *acl = | |
276 | container_of(ptr, typeof(*acl), head); | |
277 | return (acl->perm & (1 << r->param.path_number.operation)) && | |
278 | tomoyo_compare_number_union(r->param.path_number.number, | |
279 | &acl->number) && | |
280 | tomoyo_compare_name_union(r->param.path_number.filename, | |
281 | &acl->name); | |
282 | } | |
283 | ||
0df7e8b8 TH |
284 | /** |
285 | * tomoyo_check_path2_acl - Check permission for path path operation. | |
286 | * | |
287 | * @r: Pointer to "struct tomoyo_request_info". | |
288 | * @ptr: Pointer to "struct tomoyo_acl_info". | |
289 | * | |
290 | * Returns true if granted, false otherwise. | |
291 | */ | |
484ca79c | 292 | static bool tomoyo_check_path2_acl(struct tomoyo_request_info *r, |
99a85259 TH |
293 | const struct tomoyo_acl_info *ptr) |
294 | { | |
295 | const struct tomoyo_path2_acl *acl = | |
296 | container_of(ptr, typeof(*acl), head); | |
297 | return (acl->perm & (1 << r->param.path2.operation)) && | |
298 | tomoyo_compare_name_union(r->param.path2.filename1, &acl->name1) | |
299 | && tomoyo_compare_name_union(r->param.path2.filename2, | |
300 | &acl->name2); | |
301 | } | |
302 | ||
0df7e8b8 TH |
303 | /** |
304 | * tomoyo_check_mkdev_acl - Check permission for path number number number operation. | |
305 | * | |
306 | * @r: Pointer to "struct tomoyo_request_info". | |
307 | * @ptr: Pointer to "struct tomoyo_acl_info". | |
308 | * | |
309 | * Returns true if granted, false otherwise. | |
310 | */ | |
484ca79c | 311 | static bool tomoyo_check_mkdev_acl(struct tomoyo_request_info *r, |
0df7e8b8 | 312 | const struct tomoyo_acl_info *ptr) |
99a85259 | 313 | { |
75093152 | 314 | const struct tomoyo_mkdev_acl *acl = |
99a85259 TH |
315 | container_of(ptr, typeof(*acl), head); |
316 | return (acl->perm & (1 << r->param.mkdev.operation)) && | |
317 | tomoyo_compare_number_union(r->param.mkdev.mode, | |
318 | &acl->mode) && | |
319 | tomoyo_compare_number_union(r->param.mkdev.major, | |
320 | &acl->major) && | |
321 | tomoyo_compare_number_union(r->param.mkdev.minor, | |
322 | &acl->minor) && | |
323 | tomoyo_compare_name_union(r->param.mkdev.filename, | |
324 | &acl->name); | |
b69a54ee KT |
325 | } |
326 | ||
0df7e8b8 TH |
327 | /** |
328 | * tomoyo_same_path_acl - Check for duplicated "struct tomoyo_path_acl" entry. | |
329 | * | |
330 | * @a: Pointer to "struct tomoyo_acl_info". | |
331 | * @b: Pointer to "struct tomoyo_acl_info". | |
332 | * | |
333 | * Returns true if @a == @b except permission bits, false otherwise. | |
334 | */ | |
237ab459 TH |
335 | static bool tomoyo_same_path_acl(const struct tomoyo_acl_info *a, |
336 | const struct tomoyo_acl_info *b) | |
337 | { | |
338 | const struct tomoyo_path_acl *p1 = container_of(a, typeof(*p1), head); | |
339 | const struct tomoyo_path_acl *p2 = container_of(b, typeof(*p2), head); | |
0df7e8b8 | 340 | return tomoyo_same_name_union(&p1->name, &p2->name); |
237ab459 TH |
341 | } |
342 | ||
7c75964f TH |
343 | /** |
344 | * tomoyo_merge_path_acl - Merge duplicated "struct tomoyo_path_acl" entry. | |
345 | * | |
346 | * @a: Pointer to "struct tomoyo_acl_info". | |
347 | * @b: Pointer to "struct tomoyo_acl_info". | |
348 | * @is_delete: True for @a &= ~@b, false for @a |= @b. | |
349 | * | |
350 | * Returns true if @a is empty, false otherwise. | |
351 | */ | |
237ab459 TH |
352 | static bool tomoyo_merge_path_acl(struct tomoyo_acl_info *a, |
353 | struct tomoyo_acl_info *b, | |
354 | const bool is_delete) | |
355 | { | |
356 | u16 * const a_perm = &container_of(a, struct tomoyo_path_acl, head) | |
357 | ->perm; | |
358 | u16 perm = *a_perm; | |
359 | const u16 b_perm = container_of(b, struct tomoyo_path_acl, head)->perm; | |
7c75964f | 360 | if (is_delete) |
237ab459 | 361 | perm &= ~b_perm; |
7c75964f | 362 | else |
237ab459 | 363 | perm |= b_perm; |
237ab459 TH |
364 | *a_perm = perm; |
365 | return !perm; | |
366 | } | |
367 | ||
b69a54ee | 368 | /** |
7ef61233 | 369 | * tomoyo_update_path_acl - Update "struct tomoyo_path_acl" list. |
b69a54ee | 370 | * |
a238cf5b TH |
371 | * @perm: Permission. |
372 | * @param: Pointer to "struct tomoyo_acl_param". | |
b69a54ee KT |
373 | * |
374 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
375 | * |
376 | * Caller holds tomoyo_read_lock(). | |
b69a54ee | 377 | */ |
a238cf5b TH |
378 | static int tomoyo_update_path_acl(const u16 perm, |
379 | struct tomoyo_acl_param *param) | |
b69a54ee | 380 | { |
9e4b50e9 TH |
381 | struct tomoyo_path_acl e = { |
382 | .head.type = TOMOYO_TYPE_PATH_ACL, | |
a238cf5b | 383 | .perm = perm |
9e4b50e9 | 384 | }; |
237ab459 | 385 | int error; |
a238cf5b TH |
386 | if (!tomoyo_parse_name_union(param, &e.name)) |
387 | error = -EINVAL; | |
388 | else | |
389 | error = tomoyo_update_domain(&e.head, sizeof(e), param, | |
390 | tomoyo_same_path_acl, | |
391 | tomoyo_merge_path_acl); | |
7762fbff | 392 | tomoyo_put_name_union(&e.name); |
b69a54ee KT |
393 | return error; |
394 | } | |
395 | ||
0df7e8b8 TH |
396 | /** |
397 | * tomoyo_same_mkdev_acl - Check for duplicated "struct tomoyo_mkdev_acl" entry. | |
398 | * | |
399 | * @a: Pointer to "struct tomoyo_acl_info". | |
400 | * @b: Pointer to "struct tomoyo_acl_info". | |
401 | * | |
402 | * Returns true if @a == @b except permission bits, false otherwise. | |
403 | */ | |
75093152 | 404 | static bool tomoyo_same_mkdev_acl(const struct tomoyo_acl_info *a, |
237ab459 TH |
405 | const struct tomoyo_acl_info *b) |
406 | { | |
0df7e8b8 TH |
407 | const struct tomoyo_mkdev_acl *p1 = container_of(a, typeof(*p1), head); |
408 | const struct tomoyo_mkdev_acl *p2 = container_of(b, typeof(*p2), head); | |
409 | return tomoyo_same_name_union(&p1->name, &p2->name) && | |
410 | tomoyo_same_number_union(&p1->mode, &p2->mode) && | |
411 | tomoyo_same_number_union(&p1->major, &p2->major) && | |
412 | tomoyo_same_number_union(&p1->minor, &p2->minor); | |
237ab459 TH |
413 | } |
414 | ||
0df7e8b8 TH |
415 | /** |
416 | * tomoyo_merge_mkdev_acl - Merge duplicated "struct tomoyo_mkdev_acl" entry. | |
417 | * | |
418 | * @a: Pointer to "struct tomoyo_acl_info". | |
419 | * @b: Pointer to "struct tomoyo_acl_info". | |
420 | * @is_delete: True for @a &= ~@b, false for @a |= @b. | |
421 | * | |
422 | * Returns true if @a is empty, false otherwise. | |
423 | */ | |
75093152 | 424 | static bool tomoyo_merge_mkdev_acl(struct tomoyo_acl_info *a, |
0df7e8b8 TH |
425 | struct tomoyo_acl_info *b, |
426 | const bool is_delete) | |
237ab459 | 427 | { |
75093152 | 428 | u8 *const a_perm = &container_of(a, struct tomoyo_mkdev_acl, |
237ab459 TH |
429 | head)->perm; |
430 | u8 perm = *a_perm; | |
75093152 | 431 | const u8 b_perm = container_of(b, struct tomoyo_mkdev_acl, head) |
237ab459 TH |
432 | ->perm; |
433 | if (is_delete) | |
434 | perm &= ~b_perm; | |
435 | else | |
436 | perm |= b_perm; | |
437 | *a_perm = perm; | |
438 | return !perm; | |
439 | } | |
440 | ||
a1f9bb6a | 441 | /** |
75093152 | 442 | * tomoyo_update_mkdev_acl - Update "struct tomoyo_mkdev_acl" list. |
a1f9bb6a | 443 | * |
a238cf5b TH |
444 | * @perm: Permission. |
445 | * @param: Pointer to "struct tomoyo_acl_param". | |
a1f9bb6a TH |
446 | * |
447 | * Returns 0 on success, negative value otherwise. | |
237ab459 TH |
448 | * |
449 | * Caller holds tomoyo_read_lock(). | |
a1f9bb6a | 450 | */ |
a238cf5b TH |
451 | static int tomoyo_update_mkdev_acl(const u8 perm, |
452 | struct tomoyo_acl_param *param) | |
a1f9bb6a | 453 | { |
75093152 TH |
454 | struct tomoyo_mkdev_acl e = { |
455 | .head.type = TOMOYO_TYPE_MKDEV_ACL, | |
a238cf5b | 456 | .perm = perm |
a1f9bb6a | 457 | }; |
a238cf5b TH |
458 | int error; |
459 | if (!tomoyo_parse_name_union(param, &e.name) || | |
460 | !tomoyo_parse_number_union(param, &e.mode) || | |
461 | !tomoyo_parse_number_union(param, &e.major) || | |
462 | !tomoyo_parse_number_union(param, &e.minor)) | |
463 | error = -EINVAL; | |
464 | else | |
465 | error = tomoyo_update_domain(&e.head, sizeof(e), param, | |
466 | tomoyo_same_mkdev_acl, | |
467 | tomoyo_merge_mkdev_acl); | |
a1f9bb6a TH |
468 | tomoyo_put_name_union(&e.name); |
469 | tomoyo_put_number_union(&e.mode); | |
470 | tomoyo_put_number_union(&e.major); | |
471 | tomoyo_put_number_union(&e.minor); | |
472 | return error; | |
473 | } | |
474 | ||
0df7e8b8 TH |
475 | /** |
476 | * tomoyo_same_path2_acl - Check for duplicated "struct tomoyo_path2_acl" entry. | |
477 | * | |
478 | * @a: Pointer to "struct tomoyo_acl_info". | |
479 | * @b: Pointer to "struct tomoyo_acl_info". | |
480 | * | |
481 | * Returns true if @a == @b except permission bits, false otherwise. | |
482 | */ | |
237ab459 TH |
483 | static bool tomoyo_same_path2_acl(const struct tomoyo_acl_info *a, |
484 | const struct tomoyo_acl_info *b) | |
485 | { | |
486 | const struct tomoyo_path2_acl *p1 = container_of(a, typeof(*p1), head); | |
487 | const struct tomoyo_path2_acl *p2 = container_of(b, typeof(*p2), head); | |
0df7e8b8 TH |
488 | return tomoyo_same_name_union(&p1->name1, &p2->name1) && |
489 | tomoyo_same_name_union(&p1->name2, &p2->name2); | |
237ab459 TH |
490 | } |
491 | ||
0df7e8b8 TH |
492 | /** |
493 | * tomoyo_merge_path2_acl - Merge duplicated "struct tomoyo_path2_acl" entry. | |
494 | * | |
495 | * @a: Pointer to "struct tomoyo_acl_info". | |
496 | * @b: Pointer to "struct tomoyo_acl_info". | |
497 | * @is_delete: True for @a &= ~@b, false for @a |= @b. | |
498 | * | |
499 | * Returns true if @a is empty, false otherwise. | |
500 | */ | |
237ab459 TH |
501 | static bool tomoyo_merge_path2_acl(struct tomoyo_acl_info *a, |
502 | struct tomoyo_acl_info *b, | |
503 | const bool is_delete) | |
504 | { | |
505 | u8 * const a_perm = &container_of(a, struct tomoyo_path2_acl, head) | |
506 | ->perm; | |
507 | u8 perm = *a_perm; | |
508 | const u8 b_perm = container_of(b, struct tomoyo_path2_acl, head)->perm; | |
509 | if (is_delete) | |
510 | perm &= ~b_perm; | |
511 | else | |
512 | perm |= b_perm; | |
513 | *a_perm = perm; | |
514 | return !perm; | |
515 | } | |
516 | ||
b69a54ee | 517 | /** |
7ef61233 | 518 | * tomoyo_update_path2_acl - Update "struct tomoyo_path2_acl" list. |
b69a54ee | 519 | * |
a238cf5b TH |
520 | * @perm: Permission. |
521 | * @param: Pointer to "struct tomoyo_acl_param". | |
b69a54ee KT |
522 | * |
523 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
524 | * |
525 | * Caller holds tomoyo_read_lock(). | |
b69a54ee | 526 | */ |
a238cf5b TH |
527 | static int tomoyo_update_path2_acl(const u8 perm, |
528 | struct tomoyo_acl_param *param) | |
b69a54ee | 529 | { |
9e4b50e9 TH |
530 | struct tomoyo_path2_acl e = { |
531 | .head.type = TOMOYO_TYPE_PATH2_ACL, | |
a238cf5b | 532 | .perm = perm |
9e4b50e9 | 533 | }; |
a238cf5b TH |
534 | int error; |
535 | if (!tomoyo_parse_name_union(param, &e.name1) || | |
536 | !tomoyo_parse_name_union(param, &e.name2)) | |
537 | error = -EINVAL; | |
538 | else | |
539 | error = tomoyo_update_domain(&e.head, sizeof(e), param, | |
540 | tomoyo_same_path2_acl, | |
541 | tomoyo_merge_path2_acl); | |
7762fbff TH |
542 | tomoyo_put_name_union(&e.name1); |
543 | tomoyo_put_name_union(&e.name2); | |
b69a54ee KT |
544 | return error; |
545 | } | |
546 | ||
b69a54ee | 547 | /** |
cb0abe6a | 548 | * tomoyo_path_permission - Check permission for single path operation. |
b69a54ee | 549 | * |
cb0abe6a | 550 | * @r: Pointer to "struct tomoyo_request_info". |
b69a54ee KT |
551 | * @operation: Type of operation. |
552 | * @filename: Filename to check. | |
b69a54ee KT |
553 | * |
554 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
555 | * |
556 | * Caller holds tomoyo_read_lock(). | |
b69a54ee | 557 | */ |
778c4a4d TH |
558 | static int tomoyo_path_permission(struct tomoyo_request_info *r, u8 operation, |
559 | const struct tomoyo_path_info *filename) | |
b69a54ee | 560 | { |
b69a54ee | 561 | int error; |
b69a54ee | 562 | |
57c2590f | 563 | r->type = tomoyo_p2mac[operation]; |
bd03a3e4 | 564 | r->mode = tomoyo_get_mode(r->domain->ns, r->profile, r->type); |
57c2590f TH |
565 | if (r->mode == TOMOYO_CONFIG_DISABLED) |
566 | return 0; | |
cf6e9a64 TH |
567 | r->param_type = TOMOYO_TYPE_PATH_ACL; |
568 | r->param.path.filename = filename; | |
569 | r->param.path.operation = operation; | |
17fcfbd9 | 570 | do { |
99a85259 | 571 | tomoyo_check_acl(r, tomoyo_check_path_acl); |
99a85259 | 572 | error = tomoyo_audit_path_log(r); |
6bce98ed | 573 | } while (error == TOMOYO_RETRY_REQUEST); |
b69a54ee KT |
574 | return error; |
575 | } | |
576 | ||
6bce98ed TH |
577 | /** |
578 | * tomoyo_execute_permission - Check permission for execute operation. | |
579 | * | |
580 | * @r: Pointer to "struct tomoyo_request_info". | |
581 | * @filename: Filename to check. | |
582 | * | |
583 | * Returns 0 on success, negative value otherwise. | |
584 | * | |
585 | * Caller holds tomoyo_read_lock(). | |
586 | */ | |
587 | int tomoyo_execute_permission(struct tomoyo_request_info *r, | |
588 | const struct tomoyo_path_info *filename) | |
589 | { | |
590 | /* | |
591 | * Unlike other permission checks, this check is done regardless of | |
592 | * profile mode settings in order to check for domain transition | |
593 | * preference. | |
594 | */ | |
595 | r->type = TOMOYO_MAC_FILE_EXECUTE; | |
596 | r->mode = tomoyo_get_mode(r->domain->ns, r->profile, r->type); | |
597 | r->param_type = TOMOYO_TYPE_PATH_ACL; | |
598 | r->param.path.filename = filename; | |
599 | r->param.path.operation = TOMOYO_TYPE_EXECUTE; | |
600 | tomoyo_check_acl(r, tomoyo_check_path_acl); | |
601 | r->ee->transition = r->matched_acl && r->matched_acl->cond ? | |
602 | r->matched_acl->cond->transit : NULL; | |
603 | if (r->mode != TOMOYO_CONFIG_DISABLED) | |
604 | return tomoyo_audit_path_log(r); | |
605 | return 0; | |
606 | } | |
607 | ||
0df7e8b8 TH |
608 | /** |
609 | * tomoyo_same_path_number_acl - Check for duplicated "struct tomoyo_path_number_acl" entry. | |
610 | * | |
611 | * @a: Pointer to "struct tomoyo_acl_info". | |
612 | * @b: Pointer to "struct tomoyo_acl_info". | |
613 | * | |
614 | * Returns true if @a == @b except permission bits, false otherwise. | |
615 | */ | |
237ab459 TH |
616 | static bool tomoyo_same_path_number_acl(const struct tomoyo_acl_info *a, |
617 | const struct tomoyo_acl_info *b) | |
618 | { | |
619 | const struct tomoyo_path_number_acl *p1 = container_of(a, typeof(*p1), | |
620 | head); | |
621 | const struct tomoyo_path_number_acl *p2 = container_of(b, typeof(*p2), | |
622 | head); | |
0df7e8b8 TH |
623 | return tomoyo_same_name_union(&p1->name, &p2->name) && |
624 | tomoyo_same_number_union(&p1->number, &p2->number); | |
237ab459 TH |
625 | } |
626 | ||
0df7e8b8 TH |
627 | /** |
628 | * tomoyo_merge_path_number_acl - Merge duplicated "struct tomoyo_path_number_acl" entry. | |
629 | * | |
630 | * @a: Pointer to "struct tomoyo_acl_info". | |
631 | * @b: Pointer to "struct tomoyo_acl_info". | |
632 | * @is_delete: True for @a &= ~@b, false for @a |= @b. | |
633 | * | |
634 | * Returns true if @a is empty, false otherwise. | |
635 | */ | |
237ab459 TH |
636 | static bool tomoyo_merge_path_number_acl(struct tomoyo_acl_info *a, |
637 | struct tomoyo_acl_info *b, | |
638 | const bool is_delete) | |
639 | { | |
640 | u8 * const a_perm = &container_of(a, struct tomoyo_path_number_acl, | |
641 | head)->perm; | |
642 | u8 perm = *a_perm; | |
643 | const u8 b_perm = container_of(b, struct tomoyo_path_number_acl, head) | |
644 | ->perm; | |
645 | if (is_delete) | |
646 | perm &= ~b_perm; | |
647 | else | |
648 | perm |= b_perm; | |
649 | *a_perm = perm; | |
650 | return !perm; | |
651 | } | |
652 | ||
a1f9bb6a TH |
653 | /** |
654 | * tomoyo_update_path_number_acl - Update ioctl/chmod/chown/chgrp ACL. | |
655 | * | |
a238cf5b TH |
656 | * @perm: Permission. |
657 | * @param: Pointer to "struct tomoyo_acl_param". | |
a1f9bb6a TH |
658 | * |
659 | * Returns 0 on success, negative value otherwise. | |
660 | */ | |
a238cf5b TH |
661 | static int tomoyo_update_path_number_acl(const u8 perm, |
662 | struct tomoyo_acl_param *param) | |
a1f9bb6a | 663 | { |
a1f9bb6a TH |
664 | struct tomoyo_path_number_acl e = { |
665 | .head.type = TOMOYO_TYPE_PATH_NUMBER_ACL, | |
a238cf5b | 666 | .perm = perm |
a1f9bb6a | 667 | }; |
a238cf5b TH |
668 | int error; |
669 | if (!tomoyo_parse_name_union(param, &e.name) || | |
670 | !tomoyo_parse_number_union(param, &e.number)) | |
671 | error = -EINVAL; | |
672 | else | |
673 | error = tomoyo_update_domain(&e.head, sizeof(e), param, | |
674 | tomoyo_same_path_number_acl, | |
675 | tomoyo_merge_path_number_acl); | |
a1f9bb6a TH |
676 | tomoyo_put_name_union(&e.name); |
677 | tomoyo_put_number_union(&e.number); | |
678 | return error; | |
679 | } | |
680 | ||
a1f9bb6a TH |
681 | /** |
682 | * tomoyo_path_number_perm - Check permission for "create", "mkdir", "mkfifo", "mksock", "ioctl", "chmod", "chown", "chgrp". | |
683 | * | |
684 | * @type: Type of operation. | |
685 | * @path: Pointer to "struct path". | |
686 | * @number: Number. | |
687 | * | |
688 | * Returns 0 on success, negative value otherwise. | |
689 | */ | |
690 | int tomoyo_path_number_perm(const u8 type, struct path *path, | |
691 | unsigned long number) | |
692 | { | |
693 | struct tomoyo_request_info r; | |
97fb35e4 TH |
694 | struct tomoyo_obj_info obj = { |
695 | .path1 = *path, | |
696 | }; | |
a1f9bb6a | 697 | int error = -ENOMEM; |
c8c57e84 | 698 | struct tomoyo_path_info buf; |
a1f9bb6a TH |
699 | int idx; |
700 | ||
57c2590f | 701 | if (tomoyo_init_request_info(&r, NULL, tomoyo_pn2mac[type]) |
5625f2e3 | 702 | == TOMOYO_CONFIG_DISABLED || !path->dentry) |
a1f9bb6a TH |
703 | return 0; |
704 | idx = tomoyo_read_lock(); | |
c8c57e84 | 705 | if (!tomoyo_get_realpath(&buf, path)) |
a1f9bb6a | 706 | goto out; |
97fb35e4 | 707 | r.obj = &obj; |
c8c57e84 TH |
708 | if (type == TOMOYO_TYPE_MKDIR) |
709 | tomoyo_add_slash(&buf); | |
cb917cf5 TH |
710 | r.param_type = TOMOYO_TYPE_PATH_NUMBER_ACL; |
711 | r.param.path_number.operation = type; | |
712 | r.param.path_number.filename = &buf; | |
713 | r.param.path_number.number = number; | |
714 | do { | |
715 | tomoyo_check_acl(&r, tomoyo_check_path_number_acl); | |
716 | error = tomoyo_audit_path_number_log(&r); | |
717 | } while (error == TOMOYO_RETRY_REQUEST); | |
c8c57e84 | 718 | kfree(buf.name); |
cb917cf5 | 719 | out: |
a1f9bb6a TH |
720 | tomoyo_read_unlock(idx); |
721 | if (r.mode != TOMOYO_CONFIG_ENFORCING) | |
722 | error = 0; | |
723 | return error; | |
724 | } | |
725 | ||
b69a54ee KT |
726 | /** |
727 | * tomoyo_check_open_permission - Check permission for "read" and "write". | |
728 | * | |
729 | * @domain: Pointer to "struct tomoyo_domain_info". | |
730 | * @path: Pointer to "struct path". | |
731 | * @flag: Flags for open(). | |
732 | * | |
733 | * Returns 0 on success, negative value otherwise. | |
734 | */ | |
735 | int tomoyo_check_open_permission(struct tomoyo_domain_info *domain, | |
736 | struct path *path, const int flag) | |
737 | { | |
738 | const u8 acc_mode = ACC_MODE(flag); | |
eae61f3c | 739 | int error = 0; |
c8c57e84 | 740 | struct tomoyo_path_info buf; |
cb0abe6a | 741 | struct tomoyo_request_info r; |
97fb35e4 TH |
742 | struct tomoyo_obj_info obj = { |
743 | .path1 = *path, | |
744 | }; | |
fdb8ebb7 | 745 | int idx; |
b69a54ee | 746 | |
57c2590f TH |
747 | buf.name = NULL; |
748 | r.mode = TOMOYO_CONFIG_DISABLED; | |
fdb8ebb7 | 749 | idx = tomoyo_read_lock(); |
7c75964f TH |
750 | if (acc_mode && |
751 | tomoyo_init_request_info(&r, domain, TOMOYO_MAC_FILE_OPEN) | |
57c2590f TH |
752 | != TOMOYO_CONFIG_DISABLED) { |
753 | if (!tomoyo_get_realpath(&buf, path)) { | |
754 | error = -ENOMEM; | |
755 | goto out; | |
756 | } | |
97fb35e4 | 757 | r.obj = &obj; |
7c75964f TH |
758 | if (acc_mode & MAY_READ) |
759 | error = tomoyo_path_permission(&r, TOMOYO_TYPE_READ, | |
760 | &buf); | |
761 | if (!error && (acc_mode & MAY_WRITE)) | |
762 | error = tomoyo_path_permission(&r, (flag & O_APPEND) ? | |
763 | TOMOYO_TYPE_APPEND : | |
764 | TOMOYO_TYPE_WRITE, | |
57c2590f | 765 | &buf); |
57c2590f | 766 | } |
b69a54ee | 767 | out: |
c8c57e84 | 768 | kfree(buf.name); |
fdb8ebb7 | 769 | tomoyo_read_unlock(idx); |
cb0abe6a | 770 | if (r.mode != TOMOYO_CONFIG_ENFORCING) |
b69a54ee KT |
771 | error = 0; |
772 | return error; | |
773 | } | |
774 | ||
775 | /** | |
7c75964f | 776 | * tomoyo_path_perm - Check permission for "unlink", "rmdir", "truncate", "symlink", "append", "chroot" and "unmount". |
b69a54ee | 777 | * |
b69a54ee KT |
778 | * @operation: Type of operation. |
779 | * @path: Pointer to "struct path". | |
97fb35e4 TH |
780 | * @target: Symlink's target if @operation is TOMOYO_TYPE_SYMLINK, |
781 | * NULL otherwise. | |
b69a54ee KT |
782 | * |
783 | * Returns 0 on success, negative value otherwise. | |
784 | */ | |
97fb35e4 | 785 | int tomoyo_path_perm(const u8 operation, struct path *path, const char *target) |
b69a54ee | 786 | { |
cb0abe6a | 787 | struct tomoyo_request_info r; |
97fb35e4 TH |
788 | struct tomoyo_obj_info obj = { |
789 | .path1 = *path, | |
790 | }; | |
7c75964f TH |
791 | int error; |
792 | struct tomoyo_path_info buf; | |
793 | bool is_enforce; | |
97fb35e4 | 794 | struct tomoyo_path_info symlink_target; |
fdb8ebb7 | 795 | int idx; |
b69a54ee | 796 | |
57c2590f TH |
797 | if (tomoyo_init_request_info(&r, NULL, tomoyo_p2mac[operation]) |
798 | == TOMOYO_CONFIG_DISABLED) | |
b69a54ee | 799 | return 0; |
7c75964f TH |
800 | is_enforce = (r.mode == TOMOYO_CONFIG_ENFORCING); |
801 | error = -ENOMEM; | |
57c2590f | 802 | buf.name = NULL; |
fdb8ebb7 | 803 | idx = tomoyo_read_lock(); |
c8c57e84 | 804 | if (!tomoyo_get_realpath(&buf, path)) |
b69a54ee | 805 | goto out; |
97fb35e4 | 806 | r.obj = &obj; |
b69a54ee | 807 | switch (operation) { |
7ef61233 TH |
808 | case TOMOYO_TYPE_RMDIR: |
809 | case TOMOYO_TYPE_CHROOT: | |
c8c57e84 TH |
810 | tomoyo_add_slash(&buf); |
811 | break; | |
97fb35e4 TH |
812 | case TOMOYO_TYPE_SYMLINK: |
813 | symlink_target.name = tomoyo_encode(target); | |
814 | if (!symlink_target.name) | |
815 | goto out; | |
816 | tomoyo_fill_path_info(&symlink_target); | |
817 | obj.symlink_target = &symlink_target; | |
818 | break; | |
b69a54ee | 819 | } |
c8c57e84 | 820 | error = tomoyo_path_permission(&r, operation, &buf); |
97fb35e4 TH |
821 | if (operation == TOMOYO_TYPE_SYMLINK) |
822 | kfree(symlink_target.name); | |
b69a54ee | 823 | out: |
c8c57e84 | 824 | kfree(buf.name); |
fdb8ebb7 | 825 | tomoyo_read_unlock(idx); |
7c75964f | 826 | if (!is_enforce) |
b69a54ee KT |
827 | error = 0; |
828 | return error; | |
829 | } | |
830 | ||
a1f9bb6a | 831 | /** |
75093152 | 832 | * tomoyo_mkdev_perm - Check permission for "mkblock" and "mkchar". |
a1f9bb6a TH |
833 | * |
834 | * @operation: Type of operation. (TOMOYO_TYPE_MKCHAR or TOMOYO_TYPE_MKBLOCK) | |
835 | * @path: Pointer to "struct path". | |
836 | * @mode: Create mode. | |
837 | * @dev: Device number. | |
838 | * | |
839 | * Returns 0 on success, negative value otherwise. | |
840 | */ | |
75093152 | 841 | int tomoyo_mkdev_perm(const u8 operation, struct path *path, |
0df7e8b8 | 842 | const unsigned int mode, unsigned int dev) |
a1f9bb6a TH |
843 | { |
844 | struct tomoyo_request_info r; | |
97fb35e4 TH |
845 | struct tomoyo_obj_info obj = { |
846 | .path1 = *path, | |
847 | }; | |
a1f9bb6a | 848 | int error = -ENOMEM; |
c8c57e84 | 849 | struct tomoyo_path_info buf; |
a1f9bb6a TH |
850 | int idx; |
851 | ||
5625f2e3 | 852 | if (tomoyo_init_request_info(&r, NULL, tomoyo_pnnn2mac[operation]) |
57c2590f | 853 | == TOMOYO_CONFIG_DISABLED) |
a1f9bb6a TH |
854 | return 0; |
855 | idx = tomoyo_read_lock(); | |
856 | error = -ENOMEM; | |
c8c57e84 | 857 | if (tomoyo_get_realpath(&buf, path)) { |
97fb35e4 | 858 | r.obj = &obj; |
cf6e9a64 | 859 | dev = new_decode_dev(dev); |
75093152 | 860 | r.param_type = TOMOYO_TYPE_MKDEV_ACL; |
cf6e9a64 TH |
861 | r.param.mkdev.filename = &buf; |
862 | r.param.mkdev.operation = operation; | |
863 | r.param.mkdev.mode = mode; | |
864 | r.param.mkdev.major = MAJOR(dev); | |
865 | r.param.mkdev.minor = MINOR(dev); | |
99a85259 TH |
866 | tomoyo_check_acl(&r, tomoyo_check_mkdev_acl); |
867 | error = tomoyo_audit_mkdev_log(&r); | |
c8c57e84 | 868 | kfree(buf.name); |
a1f9bb6a TH |
869 | } |
870 | tomoyo_read_unlock(idx); | |
871 | if (r.mode != TOMOYO_CONFIG_ENFORCING) | |
872 | error = 0; | |
873 | return error; | |
874 | } | |
875 | ||
b69a54ee | 876 | /** |
7ef61233 | 877 | * tomoyo_path2_perm - Check permission for "rename", "link" and "pivot_root". |
b69a54ee | 878 | * |
b69a54ee KT |
879 | * @operation: Type of operation. |
880 | * @path1: Pointer to "struct path". | |
881 | * @path2: Pointer to "struct path". | |
882 | * | |
883 | * Returns 0 on success, negative value otherwise. | |
884 | */ | |
97d6931e | 885 | int tomoyo_path2_perm(const u8 operation, struct path *path1, |
7ef61233 | 886 | struct path *path2) |
b69a54ee KT |
887 | { |
888 | int error = -ENOMEM; | |
c8c57e84 TH |
889 | struct tomoyo_path_info buf1; |
890 | struct tomoyo_path_info buf2; | |
cb0abe6a | 891 | struct tomoyo_request_info r; |
97fb35e4 TH |
892 | struct tomoyo_obj_info obj = { |
893 | .path1 = *path1, | |
894 | .path2 = *path2, | |
895 | }; | |
fdb8ebb7 | 896 | int idx; |
b69a54ee | 897 | |
5625f2e3 | 898 | if (tomoyo_init_request_info(&r, NULL, tomoyo_pp2mac[operation]) |
57c2590f | 899 | == TOMOYO_CONFIG_DISABLED) |
b69a54ee | 900 | return 0; |
c8c57e84 TH |
901 | buf1.name = NULL; |
902 | buf2.name = NULL; | |
fdb8ebb7 | 903 | idx = tomoyo_read_lock(); |
c8c57e84 TH |
904 | if (!tomoyo_get_realpath(&buf1, path1) || |
905 | !tomoyo_get_realpath(&buf2, path2)) | |
b69a54ee | 906 | goto out; |
57c2590f TH |
907 | switch (operation) { |
908 | struct dentry *dentry; | |
909 | case TOMOYO_TYPE_RENAME: | |
0f2a55d5 | 910 | case TOMOYO_TYPE_LINK: |
57c2590f | 911 | dentry = path1->dentry; |
0f2a55d5 TH |
912 | if (!dentry->d_inode || !S_ISDIR(dentry->d_inode->i_mode)) |
913 | break; | |
914 | /* fall through */ | |
915 | case TOMOYO_TYPE_PIVOT_ROOT: | |
916 | tomoyo_add_slash(&buf1); | |
917 | tomoyo_add_slash(&buf2); | |
57c2590f | 918 | break; |
0f2a55d5 | 919 | } |
97fb35e4 | 920 | r.obj = &obj; |
cf6e9a64 TH |
921 | r.param_type = TOMOYO_TYPE_PATH2_ACL; |
922 | r.param.path2.operation = operation; | |
923 | r.param.path2.filename1 = &buf1; | |
924 | r.param.path2.filename2 = &buf2; | |
17fcfbd9 | 925 | do { |
99a85259 TH |
926 | tomoyo_check_acl(&r, tomoyo_check_path2_acl); |
927 | error = tomoyo_audit_path2_log(&r); | |
928 | } while (error == TOMOYO_RETRY_REQUEST); | |
b69a54ee | 929 | out: |
c8c57e84 TH |
930 | kfree(buf1.name); |
931 | kfree(buf2.name); | |
fdb8ebb7 | 932 | tomoyo_read_unlock(idx); |
cb0abe6a | 933 | if (r.mode != TOMOYO_CONFIG_ENFORCING) |
b69a54ee KT |
934 | error = 0; |
935 | return error; | |
936 | } | |
a1f9bb6a | 937 | |
a238cf5b TH |
938 | /** |
939 | * tomoyo_same_mount_acl - Check for duplicated "struct tomoyo_mount_acl" entry. | |
940 | * | |
941 | * @a: Pointer to "struct tomoyo_acl_info". | |
942 | * @b: Pointer to "struct tomoyo_acl_info". | |
943 | * | |
944 | * Returns true if @a == @b, false otherwise. | |
945 | */ | |
946 | static bool tomoyo_same_mount_acl(const struct tomoyo_acl_info *a, | |
947 | const struct tomoyo_acl_info *b) | |
948 | { | |
949 | const struct tomoyo_mount_acl *p1 = container_of(a, typeof(*p1), head); | |
950 | const struct tomoyo_mount_acl *p2 = container_of(b, typeof(*p2), head); | |
951 | return tomoyo_same_name_union(&p1->dev_name, &p2->dev_name) && | |
952 | tomoyo_same_name_union(&p1->dir_name, &p2->dir_name) && | |
953 | tomoyo_same_name_union(&p1->fs_type, &p2->fs_type) && | |
954 | tomoyo_same_number_union(&p1->flags, &p2->flags); | |
955 | } | |
956 | ||
957 | /** | |
958 | * tomoyo_update_mount_acl - Write "struct tomoyo_mount_acl" list. | |
959 | * | |
960 | * @param: Pointer to "struct tomoyo_acl_param". | |
961 | * | |
962 | * Returns 0 on success, negative value otherwise. | |
963 | * | |
964 | * Caller holds tomoyo_read_lock(). | |
965 | */ | |
966 | static int tomoyo_update_mount_acl(struct tomoyo_acl_param *param) | |
967 | { | |
968 | struct tomoyo_mount_acl e = { .head.type = TOMOYO_TYPE_MOUNT_ACL }; | |
969 | int error; | |
970 | if (!tomoyo_parse_name_union(param, &e.dev_name) || | |
971 | !tomoyo_parse_name_union(param, &e.dir_name) || | |
972 | !tomoyo_parse_name_union(param, &e.fs_type) || | |
973 | !tomoyo_parse_number_union(param, &e.flags)) | |
974 | error = -EINVAL; | |
975 | else | |
976 | error = tomoyo_update_domain(&e.head, sizeof(e), param, | |
977 | tomoyo_same_mount_acl, NULL); | |
978 | tomoyo_put_name_union(&e.dev_name); | |
979 | tomoyo_put_name_union(&e.dir_name); | |
980 | tomoyo_put_name_union(&e.fs_type); | |
981 | tomoyo_put_number_union(&e.flags); | |
982 | return error; | |
983 | } | |
984 | ||
a1f9bb6a | 985 | /** |
e2bf6907 | 986 | * tomoyo_write_file - Update file related list. |
a1f9bb6a | 987 | * |
a238cf5b | 988 | * @param: Pointer to "struct tomoyo_acl_param". |
a1f9bb6a TH |
989 | * |
990 | * Returns 0 on success, negative value otherwise. | |
991 | * | |
992 | * Caller holds tomoyo_read_lock(). | |
993 | */ | |
a238cf5b | 994 | int tomoyo_write_file(struct tomoyo_acl_param *param) |
a1f9bb6a | 995 | { |
a238cf5b | 996 | u16 perm = 0; |
a1f9bb6a | 997 | u8 type; |
a238cf5b TH |
998 | const char *operation = tomoyo_read_token(param); |
999 | for (type = 0; type < TOMOYO_MAX_PATH_OPERATION; type++) | |
1000 | if (tomoyo_permstr(operation, tomoyo_path_keyword[type])) | |
1001 | perm |= 1 << type; | |
1002 | if (perm) | |
1003 | return tomoyo_update_path_acl(perm, param); | |
1004 | for (type = 0; type < TOMOYO_MAX_PATH2_OPERATION; type++) | |
2c47ab93 TH |
1005 | if (tomoyo_permstr(operation, |
1006 | tomoyo_mac_keywords[tomoyo_pp2mac[type]])) | |
a238cf5b TH |
1007 | perm |= 1 << type; |
1008 | if (perm) | |
1009 | return tomoyo_update_path2_acl(perm, param); | |
1010 | for (type = 0; type < TOMOYO_MAX_PATH_NUMBER_OPERATION; type++) | |
1011 | if (tomoyo_permstr(operation, | |
2c47ab93 | 1012 | tomoyo_mac_keywords[tomoyo_pn2mac[type]])) |
a238cf5b TH |
1013 | perm |= 1 << type; |
1014 | if (perm) | |
1015 | return tomoyo_update_path_number_acl(perm, param); | |
1016 | for (type = 0; type < TOMOYO_MAX_MKDEV_OPERATION; type++) | |
2c47ab93 TH |
1017 | if (tomoyo_permstr(operation, |
1018 | tomoyo_mac_keywords[tomoyo_pnnn2mac[type]])) | |
a238cf5b TH |
1019 | perm |= 1 << type; |
1020 | if (perm) | |
1021 | return tomoyo_update_mkdev_acl(perm, param); | |
2c47ab93 TH |
1022 | if (tomoyo_permstr(operation, |
1023 | tomoyo_mac_keywords[TOMOYO_MAC_FILE_MOUNT])) | |
a238cf5b | 1024 | return tomoyo_update_mount_acl(param); |
a1f9bb6a TH |
1025 | return -EINVAL; |
1026 | } |