Commit | Line | Data |
---|---|---|
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. */ |
7ef61233 TH |
13 | static const char *tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION] = { |
14 | [TOMOYO_TYPE_READ_WRITE] = "read/write", | |
15 | [TOMOYO_TYPE_EXECUTE] = "execute", | |
16 | [TOMOYO_TYPE_READ] = "read", | |
17 | [TOMOYO_TYPE_WRITE] = "write", | |
7ef61233 | 18 | [TOMOYO_TYPE_UNLINK] = "unlink", |
7ef61233 | 19 | [TOMOYO_TYPE_RMDIR] = "rmdir", |
7ef61233 TH |
20 | [TOMOYO_TYPE_TRUNCATE] = "truncate", |
21 | [TOMOYO_TYPE_SYMLINK] = "symlink", | |
22 | [TOMOYO_TYPE_REWRITE] = "rewrite", | |
7ef61233 | 23 | [TOMOYO_TYPE_CHROOT] = "chroot", |
7ef61233 | 24 | [TOMOYO_TYPE_UMOUNT] = "unmount", |
b69a54ee KT |
25 | }; |
26 | ||
a1f9bb6a TH |
27 | /* Keyword array for operations with one pathname and three numbers. */ |
28 | static const char *tomoyo_path_number3_keyword | |
29 | [TOMOYO_MAX_PATH_NUMBER3_OPERATION] = { | |
30 | [TOMOYO_TYPE_MKBLOCK] = "mkblock", | |
31 | [TOMOYO_TYPE_MKCHAR] = "mkchar", | |
32 | }; | |
33 | ||
34 | /* Keyword array for operations with two pathnames. */ | |
7ef61233 | 35 | static const char *tomoyo_path2_keyword[TOMOYO_MAX_PATH2_OPERATION] = { |
a1f9bb6a TH |
36 | [TOMOYO_TYPE_LINK] = "link", |
37 | [TOMOYO_TYPE_RENAME] = "rename", | |
7ef61233 | 38 | [TOMOYO_TYPE_PIVOT_ROOT] = "pivot_root", |
b69a54ee KT |
39 | }; |
40 | ||
a1f9bb6a TH |
41 | /* Keyword array for operations with one pathname and one number. */ |
42 | static const char *tomoyo_path_number_keyword | |
43 | [TOMOYO_MAX_PATH_NUMBER_OPERATION] = { | |
44 | [TOMOYO_TYPE_CREATE] = "create", | |
45 | [TOMOYO_TYPE_MKDIR] = "mkdir", | |
46 | [TOMOYO_TYPE_MKFIFO] = "mkfifo", | |
47 | [TOMOYO_TYPE_MKSOCK] = "mksock", | |
48 | [TOMOYO_TYPE_IOCTL] = "ioctl", | |
49 | [TOMOYO_TYPE_CHMOD] = "chmod", | |
50 | [TOMOYO_TYPE_CHOWN] = "chown", | |
51 | [TOMOYO_TYPE_CHGRP] = "chgrp", | |
52 | }; | |
53 | ||
57c2590f TH |
54 | static const u8 tomoyo_p2mac[TOMOYO_MAX_PATH_OPERATION] = { |
55 | [TOMOYO_TYPE_READ_WRITE] = TOMOYO_MAC_FILE_OPEN, | |
56 | [TOMOYO_TYPE_EXECUTE] = TOMOYO_MAC_FILE_EXECUTE, | |
57 | [TOMOYO_TYPE_READ] = TOMOYO_MAC_FILE_OPEN, | |
58 | [TOMOYO_TYPE_WRITE] = TOMOYO_MAC_FILE_OPEN, | |
59 | [TOMOYO_TYPE_UNLINK] = TOMOYO_MAC_FILE_UNLINK, | |
60 | [TOMOYO_TYPE_RMDIR] = TOMOYO_MAC_FILE_RMDIR, | |
61 | [TOMOYO_TYPE_TRUNCATE] = TOMOYO_MAC_FILE_TRUNCATE, | |
62 | [TOMOYO_TYPE_SYMLINK] = TOMOYO_MAC_FILE_SYMLINK, | |
63 | [TOMOYO_TYPE_REWRITE] = TOMOYO_MAC_FILE_REWRITE, | |
64 | [TOMOYO_TYPE_CHROOT] = TOMOYO_MAC_FILE_CHROOT, | |
65 | [TOMOYO_TYPE_UMOUNT] = TOMOYO_MAC_FILE_UMOUNT, | |
66 | }; | |
67 | ||
68 | static const u8 tomoyo_pnnn2mac[TOMOYO_MAX_PATH_NUMBER3_OPERATION] = { | |
69 | [TOMOYO_TYPE_MKBLOCK] = TOMOYO_MAC_FILE_MKBLOCK, | |
70 | [TOMOYO_TYPE_MKCHAR] = TOMOYO_MAC_FILE_MKCHAR, | |
71 | }; | |
72 | ||
73 | static const u8 tomoyo_pp2mac[TOMOYO_MAX_PATH2_OPERATION] = { | |
74 | [TOMOYO_TYPE_LINK] = TOMOYO_MAC_FILE_LINK, | |
75 | [TOMOYO_TYPE_RENAME] = TOMOYO_MAC_FILE_RENAME, | |
76 | [TOMOYO_TYPE_PIVOT_ROOT] = TOMOYO_MAC_FILE_PIVOT_ROOT, | |
77 | }; | |
78 | ||
79 | static const u8 tomoyo_pn2mac[TOMOYO_MAX_PATH_NUMBER_OPERATION] = { | |
80 | [TOMOYO_TYPE_CREATE] = TOMOYO_MAC_FILE_CREATE, | |
81 | [TOMOYO_TYPE_MKDIR] = TOMOYO_MAC_FILE_MKDIR, | |
82 | [TOMOYO_TYPE_MKFIFO] = TOMOYO_MAC_FILE_MKFIFO, | |
83 | [TOMOYO_TYPE_MKSOCK] = TOMOYO_MAC_FILE_MKSOCK, | |
84 | [TOMOYO_TYPE_IOCTL] = TOMOYO_MAC_FILE_IOCTL, | |
85 | [TOMOYO_TYPE_CHMOD] = TOMOYO_MAC_FILE_CHMOD, | |
86 | [TOMOYO_TYPE_CHOWN] = TOMOYO_MAC_FILE_CHOWN, | |
87 | [TOMOYO_TYPE_CHGRP] = TOMOYO_MAC_FILE_CHGRP, | |
88 | }; | |
89 | ||
7762fbff TH |
90 | void tomoyo_put_name_union(struct tomoyo_name_union *ptr) |
91 | { | |
92 | if (!ptr) | |
93 | return; | |
94 | if (ptr->is_group) | |
95 | tomoyo_put_path_group(ptr->group); | |
96 | else | |
97 | tomoyo_put_name(ptr->filename); | |
98 | } | |
99 | ||
100 | bool tomoyo_compare_name_union(const struct tomoyo_path_info *name, | |
101 | const struct tomoyo_name_union *ptr) | |
102 | { | |
103 | if (ptr->is_group) | |
3f629636 | 104 | return tomoyo_path_matches_group(name, ptr->group); |
7762fbff TH |
105 | return tomoyo_path_matches_pattern(name, ptr->filename); |
106 | } | |
107 | ||
4c3e9e2d TH |
108 | void tomoyo_put_number_union(struct tomoyo_number_union *ptr) |
109 | { | |
110 | if (ptr && ptr->is_group) | |
111 | tomoyo_put_number_group(ptr->group); | |
112 | } | |
113 | ||
114 | bool tomoyo_compare_number_union(const unsigned long value, | |
115 | const struct tomoyo_number_union *ptr) | |
116 | { | |
117 | if (ptr->is_group) | |
118 | return tomoyo_number_matches_group(value, value, ptr->group); | |
119 | return value >= ptr->values[0] && value <= ptr->values[1]; | |
120 | } | |
121 | ||
b69a54ee | 122 | /** |
7ef61233 | 123 | * tomoyo_path2keyword - Get the name of single path operation. |
b69a54ee KT |
124 | * |
125 | * @operation: Type of operation. | |
126 | * | |
127 | * Returns the name of single path operation. | |
128 | */ | |
7ef61233 | 129 | const char *tomoyo_path2keyword(const u8 operation) |
b69a54ee | 130 | { |
7ef61233 TH |
131 | return (operation < TOMOYO_MAX_PATH_OPERATION) |
132 | ? tomoyo_path_keyword[operation] : NULL; | |
b69a54ee KT |
133 | } |
134 | ||
a1f9bb6a TH |
135 | /** |
136 | * tomoyo_path_number32keyword - Get the name of path/number/number/number operations. | |
137 | * | |
138 | * @operation: Type of operation. | |
139 | * | |
140 | * Returns the name of path/number/number/number operation. | |
141 | */ | |
142 | const char *tomoyo_path_number32keyword(const u8 operation) | |
143 | { | |
144 | return (operation < TOMOYO_MAX_PATH_NUMBER3_OPERATION) | |
145 | ? tomoyo_path_number3_keyword[operation] : NULL; | |
146 | } | |
147 | ||
b69a54ee | 148 | /** |
7ef61233 | 149 | * tomoyo_path22keyword - Get the name of double path operation. |
b69a54ee KT |
150 | * |
151 | * @operation: Type of operation. | |
152 | * | |
153 | * Returns the name of double path operation. | |
154 | */ | |
7ef61233 | 155 | const char *tomoyo_path22keyword(const u8 operation) |
b69a54ee | 156 | { |
7ef61233 TH |
157 | return (operation < TOMOYO_MAX_PATH2_OPERATION) |
158 | ? tomoyo_path2_keyword[operation] : NULL; | |
b69a54ee KT |
159 | } |
160 | ||
a1f9bb6a TH |
161 | /** |
162 | * tomoyo_path_number2keyword - Get the name of path/number operations. | |
163 | * | |
164 | * @operation: Type of operation. | |
165 | * | |
166 | * Returns the name of path/number operation. | |
167 | */ | |
168 | const char *tomoyo_path_number2keyword(const u8 operation) | |
169 | { | |
170 | return (operation < TOMOYO_MAX_PATH_NUMBER_OPERATION) | |
171 | ? tomoyo_path_number_keyword[operation] : NULL; | |
172 | } | |
173 | ||
c8c57e84 TH |
174 | static void tomoyo_add_slash(struct tomoyo_path_info *buf) |
175 | { | |
176 | if (buf->is_dir) | |
177 | return; | |
178 | /* | |
179 | * This is OK because tomoyo_encode() reserves space for appending "/". | |
180 | */ | |
181 | strcat((char *) buf->name, "/"); | |
182 | tomoyo_fill_path_info(buf); | |
183 | } | |
184 | ||
b69a54ee KT |
185 | /** |
186 | * tomoyo_strendswith - Check whether the token ends with the given token. | |
187 | * | |
188 | * @name: The token to check. | |
189 | * @tail: The token to find. | |
190 | * | |
191 | * Returns true if @name ends with @tail, false otherwise. | |
192 | */ | |
193 | static bool tomoyo_strendswith(const char *name, const char *tail) | |
194 | { | |
195 | int len; | |
196 | ||
197 | if (!name || !tail) | |
198 | return false; | |
199 | len = strlen(name) - strlen(tail); | |
200 | return len >= 0 && !strcmp(name + len, tail); | |
201 | } | |
202 | ||
203 | /** | |
c8c57e84 | 204 | * tomoyo_get_realpath - Get realpath. |
b69a54ee | 205 | * |
c8c57e84 | 206 | * @buf: Pointer to "struct tomoyo_path_info". |
b69a54ee KT |
207 | * @path: Pointer to "struct path". |
208 | * | |
c8c57e84 | 209 | * Returns true on success, false otherwise. |
b69a54ee | 210 | */ |
c8c57e84 | 211 | static bool tomoyo_get_realpath(struct tomoyo_path_info *buf, struct path *path) |
b69a54ee | 212 | { |
c8c57e84 TH |
213 | buf->name = tomoyo_realpath_from_path(path); |
214 | if (buf->name) { | |
215 | tomoyo_fill_path_info(buf); | |
216 | return true; | |
b69a54ee | 217 | } |
c8c57e84 | 218 | return false; |
b69a54ee KT |
219 | } |
220 | ||
7ef61233 TH |
221 | static int tomoyo_update_path2_acl(const u8 type, const char *filename1, |
222 | const char *filename2, | |
223 | struct tomoyo_domain_info *const domain, | |
224 | const bool is_delete); | |
225 | static int tomoyo_update_path_acl(const u8 type, const char *filename, | |
226 | struct tomoyo_domain_info *const domain, | |
227 | const bool is_delete); | |
b69a54ee | 228 | |
c3fa109a TH |
229 | /* |
230 | * tomoyo_globally_readable_list is used for holding list of pathnames which | |
231 | * are by default allowed to be open()ed for reading by any process. | |
232 | * | |
233 | * An entry is added by | |
234 | * | |
235 | * # echo 'allow_read /lib/libc-2.5.so' > \ | |
236 | * /sys/kernel/security/tomoyo/exception_policy | |
237 | * | |
238 | * and is deleted by | |
239 | * | |
240 | * # echo 'delete allow_read /lib/libc-2.5.so' > \ | |
241 | * /sys/kernel/security/tomoyo/exception_policy | |
242 | * | |
243 | * and all entries are retrieved by | |
244 | * | |
245 | * # grep ^allow_read /sys/kernel/security/tomoyo/exception_policy | |
246 | * | |
247 | * In the example above, any process is allowed to | |
248 | * open("/lib/libc-2.5.so", O_RDONLY). | |
249 | * One exception is, if the domain which current process belongs to is marked | |
250 | * as "ignore_global_allow_read", current process can't do so unless explicitly | |
251 | * given "allow_read /lib/libc-2.5.so" to the domain which current process | |
252 | * belongs to. | |
253 | */ | |
847b173e | 254 | LIST_HEAD(tomoyo_globally_readable_list); |
b69a54ee | 255 | |
36f5e1ff TH |
256 | static bool tomoyo_same_globally_readable(const struct tomoyo_acl_head *a, |
257 | const struct tomoyo_acl_head *b) | |
258 | { | |
259 | return container_of(a, struct tomoyo_globally_readable_file_entry, | |
260 | head)->filename == | |
261 | container_of(b, struct tomoyo_globally_readable_file_entry, | |
262 | head)->filename; | |
263 | } | |
264 | ||
b69a54ee KT |
265 | /** |
266 | * tomoyo_update_globally_readable_entry - Update "struct tomoyo_globally_readable_file_entry" list. | |
267 | * | |
268 | * @filename: Filename unconditionally permitted to open() for reading. | |
269 | * @is_delete: True if it is a delete request. | |
270 | * | |
271 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
272 | * |
273 | * Caller holds tomoyo_read_lock(). | |
b69a54ee KT |
274 | */ |
275 | static int tomoyo_update_globally_readable_entry(const char *filename, | |
276 | const bool is_delete) | |
277 | { | |
9e4b50e9 | 278 | struct tomoyo_globally_readable_file_entry e = { }; |
36f5e1ff | 279 | int error; |
b69a54ee | 280 | |
3f629636 | 281 | if (!tomoyo_is_correct_word(filename)) |
b69a54ee | 282 | return -EINVAL; |
9e4b50e9 TH |
283 | e.filename = tomoyo_get_name(filename); |
284 | if (!e.filename) | |
b69a54ee | 285 | return -ENOMEM; |
36f5e1ff TH |
286 | error = tomoyo_update_policy(&e.head, sizeof(e), is_delete, |
287 | &tomoyo_globally_readable_list, | |
288 | tomoyo_same_globally_readable); | |
9e4b50e9 | 289 | tomoyo_put_name(e.filename); |
b69a54ee KT |
290 | return error; |
291 | } | |
292 | ||
293 | /** | |
294 | * tomoyo_is_globally_readable_file - Check if the file is unconditionnaly permitted to be open()ed for reading. | |
295 | * | |
296 | * @filename: The filename to check. | |
297 | * | |
298 | * Returns true if any domain can open @filename for reading, false otherwise. | |
fdb8ebb7 TH |
299 | * |
300 | * Caller holds tomoyo_read_lock(). | |
b69a54ee KT |
301 | */ |
302 | static bool tomoyo_is_globally_readable_file(const struct tomoyo_path_info * | |
303 | filename) | |
304 | { | |
305 | struct tomoyo_globally_readable_file_entry *ptr; | |
306 | bool found = false; | |
fdb8ebb7 | 307 | |
82e0f001 TH |
308 | list_for_each_entry_rcu(ptr, &tomoyo_globally_readable_list, |
309 | head.list) { | |
310 | if (!ptr->head.is_deleted && | |
b69a54ee KT |
311 | tomoyo_path_matches_pattern(filename, ptr->filename)) { |
312 | found = true; | |
313 | break; | |
314 | } | |
315 | } | |
b69a54ee KT |
316 | return found; |
317 | } | |
318 | ||
319 | /** | |
320 | * tomoyo_write_globally_readable_policy - Write "struct tomoyo_globally_readable_file_entry" list. | |
321 | * | |
322 | * @data: String to parse. | |
323 | * @is_delete: True if it is a delete request. | |
324 | * | |
325 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
326 | * |
327 | * Caller holds tomoyo_read_lock(). | |
b69a54ee KT |
328 | */ |
329 | int tomoyo_write_globally_readable_policy(char *data, const bool is_delete) | |
330 | { | |
331 | return tomoyo_update_globally_readable_entry(data, is_delete); | |
332 | } | |
333 | ||
334 | /** | |
335 | * tomoyo_read_globally_readable_policy - Read "struct tomoyo_globally_readable_file_entry" list. | |
336 | * | |
337 | * @head: Pointer to "struct tomoyo_io_buffer". | |
338 | * | |
339 | * Returns true on success, false otherwise. | |
fdb8ebb7 TH |
340 | * |
341 | * Caller holds tomoyo_read_lock(). | |
b69a54ee KT |
342 | */ |
343 | bool tomoyo_read_globally_readable_policy(struct tomoyo_io_buffer *head) | |
344 | { | |
345 | struct list_head *pos; | |
346 | bool done = true; | |
347 | ||
b69a54ee KT |
348 | list_for_each_cookie(pos, head->read_var2, |
349 | &tomoyo_globally_readable_list) { | |
350 | struct tomoyo_globally_readable_file_entry *ptr; | |
351 | ptr = list_entry(pos, | |
352 | struct tomoyo_globally_readable_file_entry, | |
82e0f001 TH |
353 | head.list); |
354 | if (ptr->head.is_deleted) | |
b69a54ee | 355 | continue; |
7d2948b1 TH |
356 | done = tomoyo_io_printf(head, TOMOYO_KEYWORD_ALLOW_READ "%s\n", |
357 | ptr->filename->name); | |
358 | if (!done) | |
b69a54ee | 359 | break; |
b69a54ee | 360 | } |
b69a54ee KT |
361 | return done; |
362 | } | |
363 | ||
c3fa109a TH |
364 | /* tomoyo_pattern_list is used for holding list of pathnames which are used for |
365 | * converting pathnames to pathname patterns during learning mode. | |
366 | * | |
367 | * An entry is added by | |
368 | * | |
369 | * # echo 'file_pattern /proc/\$/mounts' > \ | |
370 | * /sys/kernel/security/tomoyo/exception_policy | |
371 | * | |
372 | * and is deleted by | |
373 | * | |
374 | * # echo 'delete file_pattern /proc/\$/mounts' > \ | |
375 | * /sys/kernel/security/tomoyo/exception_policy | |
376 | * | |
377 | * and all entries are retrieved by | |
378 | * | |
379 | * # grep ^file_pattern /sys/kernel/security/tomoyo/exception_policy | |
380 | * | |
381 | * In the example above, if a process which belongs to a domain which is in | |
382 | * learning mode requested open("/proc/1/mounts", O_RDONLY), | |
383 | * "allow_read /proc/\$/mounts" is automatically added to the domain which that | |
384 | * process belongs to. | |
385 | * | |
386 | * It is not a desirable behavior that we have to use /proc/\$/ instead of | |
387 | * /proc/self/ when current process needs to access only current process's | |
388 | * information. As of now, LSM version of TOMOYO is using __d_path() for | |
389 | * calculating pathname. Non LSM version of TOMOYO is using its own function | |
390 | * which pretends as if /proc/self/ is not a symlink; so that we can forbid | |
391 | * current process from accessing other process's information. | |
392 | */ | |
847b173e | 393 | LIST_HEAD(tomoyo_pattern_list); |
b69a54ee | 394 | |
36f5e1ff TH |
395 | static bool tomoyo_same_pattern(const struct tomoyo_acl_head *a, |
396 | const struct tomoyo_acl_head *b) | |
397 | { | |
398 | return container_of(a, struct tomoyo_pattern_entry, head)->pattern == | |
399 | container_of(b, struct tomoyo_pattern_entry, head)->pattern; | |
400 | } | |
401 | ||
b69a54ee KT |
402 | /** |
403 | * tomoyo_update_file_pattern_entry - Update "struct tomoyo_pattern_entry" list. | |
404 | * | |
405 | * @pattern: Pathname pattern. | |
406 | * @is_delete: True if it is a delete request. | |
407 | * | |
408 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
409 | * |
410 | * Caller holds tomoyo_read_lock(). | |
b69a54ee KT |
411 | */ |
412 | static int tomoyo_update_file_pattern_entry(const char *pattern, | |
413 | const bool is_delete) | |
414 | { | |
3f629636 | 415 | struct tomoyo_pattern_entry e = { }; |
36f5e1ff | 416 | int error; |
b69a54ee | 417 | |
3f629636 TH |
418 | if (!tomoyo_is_correct_word(pattern)) |
419 | return -EINVAL; | |
420 | e.pattern = tomoyo_get_name(pattern); | |
9e4b50e9 | 421 | if (!e.pattern) |
36f5e1ff TH |
422 | return -ENOMEM; |
423 | error = tomoyo_update_policy(&e.head, sizeof(e), is_delete, | |
424 | &tomoyo_pattern_list, | |
425 | tomoyo_same_pattern); | |
9e4b50e9 | 426 | tomoyo_put_name(e.pattern); |
b69a54ee KT |
427 | return error; |
428 | } | |
429 | ||
430 | /** | |
17fcfbd9 | 431 | * tomoyo_file_pattern - Get patterned pathname. |
b69a54ee KT |
432 | * |
433 | * @filename: The filename to find patterned pathname. | |
434 | * | |
435 | * Returns pointer to pathname pattern if matched, @filename otherwise. | |
fdb8ebb7 TH |
436 | * |
437 | * Caller holds tomoyo_read_lock(). | |
b69a54ee | 438 | */ |
17fcfbd9 | 439 | const char *tomoyo_file_pattern(const struct tomoyo_path_info *filename) |
b69a54ee KT |
440 | { |
441 | struct tomoyo_pattern_entry *ptr; | |
442 | const struct tomoyo_path_info *pattern = NULL; | |
443 | ||
82e0f001 TH |
444 | list_for_each_entry_rcu(ptr, &tomoyo_pattern_list, head.list) { |
445 | if (ptr->head.is_deleted) | |
b69a54ee KT |
446 | continue; |
447 | if (!tomoyo_path_matches_pattern(filename, ptr->pattern)) | |
448 | continue; | |
449 | pattern = ptr->pattern; | |
450 | if (tomoyo_strendswith(pattern->name, "/\\*")) { | |
451 | /* Do nothing. Try to find the better match. */ | |
452 | } else { | |
453 | /* This would be the better match. Use this. */ | |
454 | break; | |
455 | } | |
456 | } | |
b69a54ee KT |
457 | if (pattern) |
458 | filename = pattern; | |
17fcfbd9 | 459 | return filename->name; |
b69a54ee KT |
460 | } |
461 | ||
462 | /** | |
463 | * tomoyo_write_pattern_policy - Write "struct tomoyo_pattern_entry" list. | |
464 | * | |
465 | * @data: String to parse. | |
466 | * @is_delete: True if it is a delete request. | |
467 | * | |
468 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
469 | * |
470 | * Caller holds tomoyo_read_lock(). | |
b69a54ee KT |
471 | */ |
472 | int tomoyo_write_pattern_policy(char *data, const bool is_delete) | |
473 | { | |
474 | return tomoyo_update_file_pattern_entry(data, is_delete); | |
475 | } | |
476 | ||
477 | /** | |
478 | * tomoyo_read_file_pattern - Read "struct tomoyo_pattern_entry" list. | |
479 | * | |
480 | * @head: Pointer to "struct tomoyo_io_buffer". | |
481 | * | |
482 | * Returns true on success, false otherwise. | |
fdb8ebb7 TH |
483 | * |
484 | * Caller holds tomoyo_read_lock(). | |
b69a54ee KT |
485 | */ |
486 | bool tomoyo_read_file_pattern(struct tomoyo_io_buffer *head) | |
487 | { | |
488 | struct list_head *pos; | |
489 | bool done = true; | |
490 | ||
b69a54ee KT |
491 | list_for_each_cookie(pos, head->read_var2, &tomoyo_pattern_list) { |
492 | struct tomoyo_pattern_entry *ptr; | |
82e0f001 TH |
493 | ptr = list_entry(pos, struct tomoyo_pattern_entry, head.list); |
494 | if (ptr->head.is_deleted) | |
b69a54ee | 495 | continue; |
7d2948b1 TH |
496 | done = tomoyo_io_printf(head, TOMOYO_KEYWORD_FILE_PATTERN |
497 | "%s\n", ptr->pattern->name); | |
498 | if (!done) | |
b69a54ee | 499 | break; |
b69a54ee | 500 | } |
b69a54ee KT |
501 | return done; |
502 | } | |
503 | ||
c3fa109a TH |
504 | /* |
505 | * tomoyo_no_rewrite_list is used for holding list of pathnames which are by | |
506 | * default forbidden to modify already written content of a file. | |
507 | * | |
508 | * An entry is added by | |
509 | * | |
510 | * # echo 'deny_rewrite /var/log/messages' > \ | |
511 | * /sys/kernel/security/tomoyo/exception_policy | |
512 | * | |
513 | * and is deleted by | |
514 | * | |
515 | * # echo 'delete deny_rewrite /var/log/messages' > \ | |
516 | * /sys/kernel/security/tomoyo/exception_policy | |
517 | * | |
518 | * and all entries are retrieved by | |
519 | * | |
520 | * # grep ^deny_rewrite /sys/kernel/security/tomoyo/exception_policy | |
521 | * | |
522 | * In the example above, if a process requested to rewrite /var/log/messages , | |
523 | * the process can't rewrite unless the domain which that process belongs to | |
524 | * has "allow_rewrite /var/log/messages" entry. | |
525 | * | |
526 | * It is not a desirable behavior that we have to add "\040(deleted)" suffix | |
527 | * when we want to allow rewriting already unlink()ed file. As of now, | |
528 | * LSM version of TOMOYO is using __d_path() for calculating pathname. | |
529 | * Non LSM version of TOMOYO is using its own function which doesn't append | |
530 | * " (deleted)" suffix if the file is already unlink()ed; so that we don't | |
531 | * need to worry whether the file is already unlink()ed or not. | |
532 | */ | |
847b173e | 533 | LIST_HEAD(tomoyo_no_rewrite_list); |
b69a54ee | 534 | |
36f5e1ff TH |
535 | static bool tomoyo_same_no_rewrite(const struct tomoyo_acl_head *a, |
536 | const struct tomoyo_acl_head *b) | |
537 | { | |
538 | return container_of(a, struct tomoyo_no_rewrite_entry, head)->pattern | |
539 | == container_of(b, struct tomoyo_no_rewrite_entry, head) | |
540 | ->pattern; | |
541 | } | |
542 | ||
b69a54ee KT |
543 | /** |
544 | * tomoyo_update_no_rewrite_entry - Update "struct tomoyo_no_rewrite_entry" list. | |
545 | * | |
546 | * @pattern: Pathname pattern that are not rewritable by default. | |
547 | * @is_delete: True if it is a delete request. | |
548 | * | |
549 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
550 | * |
551 | * Caller holds tomoyo_read_lock(). | |
b69a54ee KT |
552 | */ |
553 | static int tomoyo_update_no_rewrite_entry(const char *pattern, | |
554 | const bool is_delete) | |
555 | { | |
9e4b50e9 | 556 | struct tomoyo_no_rewrite_entry e = { }; |
36f5e1ff | 557 | int error; |
b69a54ee | 558 | |
3f629636 | 559 | if (!tomoyo_is_correct_word(pattern)) |
b69a54ee | 560 | return -EINVAL; |
9e4b50e9 TH |
561 | e.pattern = tomoyo_get_name(pattern); |
562 | if (!e.pattern) | |
36f5e1ff TH |
563 | return -ENOMEM; |
564 | error = tomoyo_update_policy(&e.head, sizeof(e), is_delete, | |
565 | &tomoyo_no_rewrite_list, | |
566 | tomoyo_same_no_rewrite); | |
9e4b50e9 | 567 | tomoyo_put_name(e.pattern); |
b69a54ee KT |
568 | return error; |
569 | } | |
570 | ||
571 | /** | |
572 | * tomoyo_is_no_rewrite_file - Check if the given pathname is not permitted to be rewrited. | |
573 | * | |
574 | * @filename: Filename to check. | |
575 | * | |
576 | * Returns true if @filename is specified by "deny_rewrite" directive, | |
577 | * false otherwise. | |
fdb8ebb7 TH |
578 | * |
579 | * Caller holds tomoyo_read_lock(). | |
b69a54ee KT |
580 | */ |
581 | static bool tomoyo_is_no_rewrite_file(const struct tomoyo_path_info *filename) | |
582 | { | |
583 | struct tomoyo_no_rewrite_entry *ptr; | |
584 | bool found = false; | |
585 | ||
82e0f001 TH |
586 | list_for_each_entry_rcu(ptr, &tomoyo_no_rewrite_list, head.list) { |
587 | if (ptr->head.is_deleted) | |
b69a54ee KT |
588 | continue; |
589 | if (!tomoyo_path_matches_pattern(filename, ptr->pattern)) | |
590 | continue; | |
591 | found = true; | |
592 | break; | |
593 | } | |
b69a54ee KT |
594 | return found; |
595 | } | |
596 | ||
597 | /** | |
598 | * tomoyo_write_no_rewrite_policy - Write "struct tomoyo_no_rewrite_entry" list. | |
599 | * | |
600 | * @data: String to parse. | |
601 | * @is_delete: True if it is a delete request. | |
602 | * | |
603 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
604 | * |
605 | * Caller holds tomoyo_read_lock(). | |
b69a54ee KT |
606 | */ |
607 | int tomoyo_write_no_rewrite_policy(char *data, const bool is_delete) | |
608 | { | |
609 | return tomoyo_update_no_rewrite_entry(data, is_delete); | |
610 | } | |
611 | ||
612 | /** | |
613 | * tomoyo_read_no_rewrite_policy - Read "struct tomoyo_no_rewrite_entry" list. | |
614 | * | |
615 | * @head: Pointer to "struct tomoyo_io_buffer". | |
616 | * | |
617 | * Returns true on success, false otherwise. | |
fdb8ebb7 TH |
618 | * |
619 | * Caller holds tomoyo_read_lock(). | |
b69a54ee KT |
620 | */ |
621 | bool tomoyo_read_no_rewrite_policy(struct tomoyo_io_buffer *head) | |
622 | { | |
623 | struct list_head *pos; | |
624 | bool done = true; | |
625 | ||
b69a54ee KT |
626 | list_for_each_cookie(pos, head->read_var2, &tomoyo_no_rewrite_list) { |
627 | struct tomoyo_no_rewrite_entry *ptr; | |
82e0f001 TH |
628 | ptr = list_entry(pos, struct tomoyo_no_rewrite_entry, |
629 | head.list); | |
630 | if (ptr->head.is_deleted) | |
b69a54ee | 631 | continue; |
7d2948b1 TH |
632 | done = tomoyo_io_printf(head, TOMOYO_KEYWORD_DENY_REWRITE |
633 | "%s\n", ptr->pattern->name); | |
634 | if (!done) | |
b69a54ee | 635 | break; |
b69a54ee | 636 | } |
b69a54ee KT |
637 | return done; |
638 | } | |
639 | ||
b69a54ee | 640 | /** |
cb0abe6a | 641 | * tomoyo_path_acl - Check permission for single path operation. |
b69a54ee | 642 | * |
cb0abe6a | 643 | * @r: Pointer to "struct tomoyo_request_info". |
b69a54ee KT |
644 | * @filename: Filename to check. |
645 | * @perm: Permission. | |
b69a54ee KT |
646 | * |
647 | * Returns 0 on success, -EPERM otherwise. | |
fdb8ebb7 TH |
648 | * |
649 | * Caller holds tomoyo_read_lock(). | |
b69a54ee | 650 | */ |
cb0abe6a TH |
651 | static int tomoyo_path_acl(const struct tomoyo_request_info *r, |
652 | const struct tomoyo_path_info *filename, | |
3f629636 | 653 | const u32 perm) |
b69a54ee | 654 | { |
cb0abe6a | 655 | struct tomoyo_domain_info *domain = r->domain; |
b69a54ee KT |
656 | struct tomoyo_acl_info *ptr; |
657 | int error = -EPERM; | |
658 | ||
fdb8ebb7 | 659 | list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) { |
7ef61233 TH |
660 | struct tomoyo_path_acl *acl; |
661 | if (ptr->type != TOMOYO_TYPE_PATH_ACL) | |
b69a54ee | 662 | continue; |
7ef61233 | 663 | acl = container_of(ptr, struct tomoyo_path_acl, head); |
a1f9bb6a | 664 | if (!(acl->perm & perm) || |
3f629636 | 665 | !tomoyo_compare_name_union(filename, &acl->name)) |
b69a54ee | 666 | continue; |
b69a54ee KT |
667 | error = 0; |
668 | break; | |
669 | } | |
b69a54ee KT |
670 | return error; |
671 | } | |
672 | ||
237ab459 TH |
673 | static bool tomoyo_same_path_acl(const struct tomoyo_acl_info *a, |
674 | const struct tomoyo_acl_info *b) | |
675 | { | |
676 | const struct tomoyo_path_acl *p1 = container_of(a, typeof(*p1), head); | |
677 | const struct tomoyo_path_acl *p2 = container_of(b, typeof(*p2), head); | |
678 | return tomoyo_is_same_acl_head(&p1->head, &p2->head) && | |
679 | tomoyo_is_same_name_union(&p1->name, &p2->name); | |
680 | } | |
681 | ||
682 | static bool tomoyo_merge_path_acl(struct tomoyo_acl_info *a, | |
683 | struct tomoyo_acl_info *b, | |
684 | const bool is_delete) | |
685 | { | |
686 | u16 * const a_perm = &container_of(a, struct tomoyo_path_acl, head) | |
687 | ->perm; | |
688 | u16 perm = *a_perm; | |
689 | const u16 b_perm = container_of(b, struct tomoyo_path_acl, head)->perm; | |
690 | if (is_delete) { | |
691 | perm &= ~b_perm; | |
692 | if ((perm & TOMOYO_RW_MASK) != TOMOYO_RW_MASK) | |
693 | perm &= ~(1 << TOMOYO_TYPE_READ_WRITE); | |
694 | else if (!(perm & (1 << TOMOYO_TYPE_READ_WRITE))) | |
695 | perm &= ~TOMOYO_RW_MASK; | |
696 | } else { | |
697 | perm |= b_perm; | |
698 | if ((perm & TOMOYO_RW_MASK) == TOMOYO_RW_MASK) | |
699 | perm |= (1 << TOMOYO_TYPE_READ_WRITE); | |
700 | else if (perm & (1 << TOMOYO_TYPE_READ_WRITE)) | |
701 | perm |= TOMOYO_RW_MASK; | |
702 | } | |
703 | *a_perm = perm; | |
704 | return !perm; | |
705 | } | |
706 | ||
b69a54ee | 707 | /** |
7ef61233 | 708 | * tomoyo_update_path_acl - Update "struct tomoyo_path_acl" list. |
b69a54ee KT |
709 | * |
710 | * @type: Type of operation. | |
711 | * @filename: Filename. | |
712 | * @domain: Pointer to "struct tomoyo_domain_info". | |
713 | * @is_delete: True if it is a delete request. | |
714 | * | |
715 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
716 | * |
717 | * Caller holds tomoyo_read_lock(). | |
b69a54ee | 718 | */ |
7ef61233 | 719 | static int tomoyo_update_path_acl(const u8 type, const char *filename, |
237ab459 | 720 | struct tomoyo_domain_info * const domain, |
7ef61233 | 721 | const bool is_delete) |
b69a54ee | 722 | { |
9e4b50e9 TH |
723 | struct tomoyo_path_acl e = { |
724 | .head.type = TOMOYO_TYPE_PATH_ACL, | |
237ab459 | 725 | .perm = 1 << type |
9e4b50e9 | 726 | }; |
237ab459 TH |
727 | int error; |
728 | if (e.perm == (1 << TOMOYO_TYPE_READ_WRITE)) | |
729 | e.perm |= TOMOYO_RW_MASK; | |
7762fbff | 730 | if (!tomoyo_parse_name_union(filename, &e.name)) |
b69a54ee | 731 | return -EINVAL; |
237ab459 TH |
732 | error = tomoyo_update_domain(&e.head, sizeof(e), is_delete, domain, |
733 | tomoyo_same_path_acl, | |
734 | tomoyo_merge_path_acl); | |
7762fbff | 735 | tomoyo_put_name_union(&e.name); |
b69a54ee KT |
736 | return error; |
737 | } | |
738 | ||
237ab459 TH |
739 | static bool tomoyo_same_path_number3_acl(const struct tomoyo_acl_info *a, |
740 | const struct tomoyo_acl_info *b) | |
741 | { | |
742 | const struct tomoyo_path_number3_acl *p1 = container_of(a, typeof(*p1), | |
743 | head); | |
744 | const struct tomoyo_path_number3_acl *p2 = container_of(b, typeof(*p2), | |
745 | head); | |
746 | return tomoyo_is_same_acl_head(&p1->head, &p2->head) | |
747 | && tomoyo_is_same_name_union(&p1->name, &p2->name) | |
748 | && tomoyo_is_same_number_union(&p1->mode, &p2->mode) | |
749 | && tomoyo_is_same_number_union(&p1->major, &p2->major) | |
750 | && tomoyo_is_same_number_union(&p1->minor, &p2->minor); | |
751 | } | |
752 | ||
753 | static bool tomoyo_merge_path_number3_acl(struct tomoyo_acl_info *a, | |
754 | struct tomoyo_acl_info *b, | |
755 | const bool is_delete) | |
756 | { | |
757 | u8 *const a_perm = &container_of(a, struct tomoyo_path_number3_acl, | |
758 | head)->perm; | |
759 | u8 perm = *a_perm; | |
760 | const u8 b_perm = container_of(b, struct tomoyo_path_number3_acl, head) | |
761 | ->perm; | |
762 | if (is_delete) | |
763 | perm &= ~b_perm; | |
764 | else | |
765 | perm |= b_perm; | |
766 | *a_perm = perm; | |
767 | return !perm; | |
768 | } | |
769 | ||
a1f9bb6a TH |
770 | /** |
771 | * tomoyo_update_path_number3_acl - Update "struct tomoyo_path_number3_acl" list. | |
772 | * | |
773 | * @type: Type of operation. | |
774 | * @filename: Filename. | |
775 | * @mode: Create mode. | |
776 | * @major: Device major number. | |
777 | * @minor: Device minor number. | |
778 | * @domain: Pointer to "struct tomoyo_domain_info". | |
779 | * @is_delete: True if it is a delete request. | |
780 | * | |
781 | * Returns 0 on success, negative value otherwise. | |
237ab459 TH |
782 | * |
783 | * Caller holds tomoyo_read_lock(). | |
a1f9bb6a | 784 | */ |
237ab459 TH |
785 | static int tomoyo_update_path_number3_acl(const u8 type, const char *filename, |
786 | char *mode, char *major, char *minor, | |
787 | struct tomoyo_domain_info * const | |
788 | domain, const bool is_delete) | |
a1f9bb6a | 789 | { |
a1f9bb6a TH |
790 | struct tomoyo_path_number3_acl e = { |
791 | .head.type = TOMOYO_TYPE_PATH_NUMBER3_ACL, | |
237ab459 | 792 | .perm = 1 << type |
a1f9bb6a TH |
793 | }; |
794 | int error = is_delete ? -ENOENT : -ENOMEM; | |
795 | if (!tomoyo_parse_name_union(filename, &e.name) || | |
796 | !tomoyo_parse_number_union(mode, &e.mode) || | |
797 | !tomoyo_parse_number_union(major, &e.major) || | |
798 | !tomoyo_parse_number_union(minor, &e.minor)) | |
799 | goto out; | |
237ab459 TH |
800 | error = tomoyo_update_domain(&e.head, sizeof(e), is_delete, domain, |
801 | tomoyo_same_path_number3_acl, | |
802 | tomoyo_merge_path_number3_acl); | |
a1f9bb6a TH |
803 | out: |
804 | tomoyo_put_name_union(&e.name); | |
805 | tomoyo_put_number_union(&e.mode); | |
806 | tomoyo_put_number_union(&e.major); | |
807 | tomoyo_put_number_union(&e.minor); | |
808 | return error; | |
809 | } | |
810 | ||
237ab459 TH |
811 | static bool tomoyo_same_path2_acl(const struct tomoyo_acl_info *a, |
812 | const struct tomoyo_acl_info *b) | |
813 | { | |
814 | const struct tomoyo_path2_acl *p1 = container_of(a, typeof(*p1), head); | |
815 | const struct tomoyo_path2_acl *p2 = container_of(b, typeof(*p2), head); | |
816 | return tomoyo_is_same_acl_head(&p1->head, &p2->head) | |
817 | && tomoyo_is_same_name_union(&p1->name1, &p2->name1) | |
818 | && tomoyo_is_same_name_union(&p1->name2, &p2->name2); | |
819 | } | |
820 | ||
821 | static bool tomoyo_merge_path2_acl(struct tomoyo_acl_info *a, | |
822 | struct tomoyo_acl_info *b, | |
823 | const bool is_delete) | |
824 | { | |
825 | u8 * const a_perm = &container_of(a, struct tomoyo_path2_acl, head) | |
826 | ->perm; | |
827 | u8 perm = *a_perm; | |
828 | const u8 b_perm = container_of(b, struct tomoyo_path2_acl, head)->perm; | |
829 | if (is_delete) | |
830 | perm &= ~b_perm; | |
831 | else | |
832 | perm |= b_perm; | |
833 | *a_perm = perm; | |
834 | return !perm; | |
835 | } | |
836 | ||
b69a54ee | 837 | /** |
7ef61233 | 838 | * tomoyo_update_path2_acl - Update "struct tomoyo_path2_acl" list. |
b69a54ee KT |
839 | * |
840 | * @type: Type of operation. | |
841 | * @filename1: First filename. | |
842 | * @filename2: Second filename. | |
843 | * @domain: Pointer to "struct tomoyo_domain_info". | |
844 | * @is_delete: True if it is a delete request. | |
845 | * | |
846 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
847 | * |
848 | * Caller holds tomoyo_read_lock(). | |
b69a54ee | 849 | */ |
7ef61233 TH |
850 | static int tomoyo_update_path2_acl(const u8 type, const char *filename1, |
851 | const char *filename2, | |
237ab459 | 852 | struct tomoyo_domain_info * const domain, |
7ef61233 | 853 | const bool is_delete) |
b69a54ee | 854 | { |
9e4b50e9 TH |
855 | struct tomoyo_path2_acl e = { |
856 | .head.type = TOMOYO_TYPE_PATH2_ACL, | |
237ab459 | 857 | .perm = 1 << type |
9e4b50e9 | 858 | }; |
ca0b7df3 | 859 | int error = is_delete ? -ENOENT : -ENOMEM; |
7762fbff TH |
860 | if (!tomoyo_parse_name_union(filename1, &e.name1) || |
861 | !tomoyo_parse_name_union(filename2, &e.name2)) | |
ca0b7df3 | 862 | goto out; |
237ab459 TH |
863 | error = tomoyo_update_domain(&e.head, sizeof(e), is_delete, domain, |
864 | tomoyo_same_path2_acl, | |
865 | tomoyo_merge_path2_acl); | |
ca0b7df3 | 866 | out: |
7762fbff TH |
867 | tomoyo_put_name_union(&e.name1); |
868 | tomoyo_put_name_union(&e.name2); | |
b69a54ee KT |
869 | return error; |
870 | } | |
871 | ||
a1f9bb6a TH |
872 | /** |
873 | * tomoyo_path_number3_acl - Check permission for path/number/number/number operation. | |
874 | * | |
875 | * @r: Pointer to "struct tomoyo_request_info". | |
876 | * @filename: Filename to check. | |
877 | * @perm: Permission. | |
878 | * @mode: Create mode. | |
879 | * @major: Device major number. | |
880 | * @minor: Device minor number. | |
881 | * | |
882 | * Returns 0 on success, -EPERM otherwise. | |
883 | * | |
884 | * Caller holds tomoyo_read_lock(). | |
885 | */ | |
886 | static int tomoyo_path_number3_acl(struct tomoyo_request_info *r, | |
887 | const struct tomoyo_path_info *filename, | |
888 | const u16 perm, const unsigned int mode, | |
889 | const unsigned int major, | |
890 | const unsigned int minor) | |
891 | { | |
892 | struct tomoyo_domain_info *domain = r->domain; | |
893 | struct tomoyo_acl_info *ptr; | |
894 | int error = -EPERM; | |
895 | list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) { | |
896 | struct tomoyo_path_number3_acl *acl; | |
897 | if (ptr->type != TOMOYO_TYPE_PATH_NUMBER3_ACL) | |
898 | continue; | |
899 | acl = container_of(ptr, struct tomoyo_path_number3_acl, head); | |
900 | if (!tomoyo_compare_number_union(mode, &acl->mode)) | |
901 | continue; | |
902 | if (!tomoyo_compare_number_union(major, &acl->major)) | |
903 | continue; | |
904 | if (!tomoyo_compare_number_union(minor, &acl->minor)) | |
905 | continue; | |
906 | if (!(acl->perm & perm)) | |
907 | continue; | |
908 | if (!tomoyo_compare_name_union(filename, &acl->name)) | |
909 | continue; | |
910 | error = 0; | |
911 | break; | |
912 | } | |
913 | return error; | |
914 | } | |
915 | ||
b69a54ee | 916 | /** |
7ef61233 | 917 | * tomoyo_path2_acl - Check permission for double path operation. |
b69a54ee | 918 | * |
cb0abe6a | 919 | * @r: Pointer to "struct tomoyo_request_info". |
b69a54ee KT |
920 | * @type: Type of operation. |
921 | * @filename1: First filename to check. | |
922 | * @filename2: Second filename to check. | |
923 | * | |
924 | * Returns 0 on success, -EPERM otherwise. | |
fdb8ebb7 TH |
925 | * |
926 | * Caller holds tomoyo_read_lock(). | |
b69a54ee | 927 | */ |
cb0abe6a | 928 | static int tomoyo_path2_acl(const struct tomoyo_request_info *r, const u8 type, |
7ef61233 TH |
929 | const struct tomoyo_path_info *filename1, |
930 | const struct tomoyo_path_info *filename2) | |
b69a54ee | 931 | { |
cb0abe6a | 932 | const struct tomoyo_domain_info *domain = r->domain; |
b69a54ee KT |
933 | struct tomoyo_acl_info *ptr; |
934 | const u8 perm = 1 << type; | |
935 | int error = -EPERM; | |
936 | ||
fdb8ebb7 | 937 | list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) { |
7ef61233 TH |
938 | struct tomoyo_path2_acl *acl; |
939 | if (ptr->type != TOMOYO_TYPE_PATH2_ACL) | |
b69a54ee | 940 | continue; |
7ef61233 | 941 | acl = container_of(ptr, struct tomoyo_path2_acl, head); |
b69a54ee KT |
942 | if (!(acl->perm & perm)) |
943 | continue; | |
7762fbff | 944 | if (!tomoyo_compare_name_union(filename1, &acl->name1)) |
b69a54ee | 945 | continue; |
7762fbff | 946 | if (!tomoyo_compare_name_union(filename2, &acl->name2)) |
b69a54ee KT |
947 | continue; |
948 | error = 0; | |
949 | break; | |
950 | } | |
b69a54ee KT |
951 | return error; |
952 | } | |
953 | ||
954 | /** | |
cb0abe6a | 955 | * tomoyo_path_permission - Check permission for single path operation. |
b69a54ee | 956 | * |
cb0abe6a | 957 | * @r: Pointer to "struct tomoyo_request_info". |
b69a54ee KT |
958 | * @operation: Type of operation. |
959 | * @filename: Filename to check. | |
b69a54ee KT |
960 | * |
961 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
962 | * |
963 | * Caller holds tomoyo_read_lock(). | |
b69a54ee | 964 | */ |
05336dee TH |
965 | int tomoyo_path_permission(struct tomoyo_request_info *r, u8 operation, |
966 | const struct tomoyo_path_info *filename) | |
b69a54ee | 967 | { |
17fcfbd9 | 968 | const char *msg; |
b69a54ee | 969 | int error; |
b69a54ee | 970 | |
b69a54ee | 971 | next: |
57c2590f TH |
972 | r->type = tomoyo_p2mac[operation]; |
973 | r->mode = tomoyo_get_mode(r->profile, r->type); | |
974 | if (r->mode == TOMOYO_CONFIG_DISABLED) | |
975 | return 0; | |
17fcfbd9 | 976 | do { |
3f629636 | 977 | error = tomoyo_path_acl(r, filename, 1 << operation); |
05336dee TH |
978 | if (error && operation == TOMOYO_TYPE_READ && |
979 | !r->domain->ignore_global_allow_read && | |
980 | tomoyo_is_globally_readable_file(filename)) | |
981 | error = 0; | |
17fcfbd9 TH |
982 | if (!error) |
983 | break; | |
984 | msg = tomoyo_path2keyword(operation); | |
985 | tomoyo_warn_log(r, "%s %s", msg, filename->name); | |
986 | error = tomoyo_supervisor(r, "allow_%s %s\n", msg, | |
987 | tomoyo_file_pattern(filename)); | |
05336dee TH |
988 | /* |
989 | * Do not retry for execute request, for alias may have | |
990 | * changed. | |
991 | */ | |
992 | } while (error == TOMOYO_RETRY_REQUEST && | |
993 | operation != TOMOYO_TYPE_EXECUTE); | |
b69a54ee KT |
994 | /* |
995 | * Since "allow_truncate" doesn't imply "allow_rewrite" permission, | |
996 | * we need to check "allow_rewrite" permission if the filename is | |
997 | * specified by "deny_rewrite" keyword. | |
998 | */ | |
7ef61233 | 999 | if (!error && operation == TOMOYO_TYPE_TRUNCATE && |
b69a54ee | 1000 | tomoyo_is_no_rewrite_file(filename)) { |
7ef61233 | 1001 | operation = TOMOYO_TYPE_REWRITE; |
b69a54ee KT |
1002 | goto next; |
1003 | } | |
1004 | return error; | |
1005 | } | |
1006 | ||
a1f9bb6a TH |
1007 | /** |
1008 | * tomoyo_path_number_acl - Check permission for ioctl/chmod/chown/chgrp operation. | |
1009 | * | |
1010 | * @r: Pointer to "struct tomoyo_request_info". | |
1011 | * @type: Operation. | |
1012 | * @filename: Filename to check. | |
1013 | * @number: Number. | |
1014 | * | |
1015 | * Returns 0 on success, -EPERM otherwise. | |
1016 | * | |
1017 | * Caller holds tomoyo_read_lock(). | |
1018 | */ | |
1019 | static int tomoyo_path_number_acl(struct tomoyo_request_info *r, const u8 type, | |
1020 | const struct tomoyo_path_info *filename, | |
1021 | const unsigned long number) | |
1022 | { | |
1023 | struct tomoyo_domain_info *domain = r->domain; | |
1024 | struct tomoyo_acl_info *ptr; | |
1025 | const u8 perm = 1 << type; | |
1026 | int error = -EPERM; | |
1027 | list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) { | |
1028 | struct tomoyo_path_number_acl *acl; | |
1029 | if (ptr->type != TOMOYO_TYPE_PATH_NUMBER_ACL) | |
1030 | continue; | |
1031 | acl = container_of(ptr, struct tomoyo_path_number_acl, | |
1032 | head); | |
1033 | if (!(acl->perm & perm) || | |
1034 | !tomoyo_compare_number_union(number, &acl->number) || | |
1035 | !tomoyo_compare_name_union(filename, &acl->name)) | |
1036 | continue; | |
1037 | error = 0; | |
1038 | break; | |
1039 | } | |
1040 | return error; | |
1041 | } | |
1042 | ||
237ab459 TH |
1043 | static bool tomoyo_same_path_number_acl(const struct tomoyo_acl_info *a, |
1044 | const struct tomoyo_acl_info *b) | |
1045 | { | |
1046 | const struct tomoyo_path_number_acl *p1 = container_of(a, typeof(*p1), | |
1047 | head); | |
1048 | const struct tomoyo_path_number_acl *p2 = container_of(b, typeof(*p2), | |
1049 | head); | |
1050 | return tomoyo_is_same_acl_head(&p1->head, &p2->head) | |
1051 | && tomoyo_is_same_name_union(&p1->name, &p2->name) | |
1052 | && tomoyo_is_same_number_union(&p1->number, &p2->number); | |
1053 | } | |
1054 | ||
1055 | static bool tomoyo_merge_path_number_acl(struct tomoyo_acl_info *a, | |
1056 | struct tomoyo_acl_info *b, | |
1057 | const bool is_delete) | |
1058 | { | |
1059 | u8 * const a_perm = &container_of(a, struct tomoyo_path_number_acl, | |
1060 | head)->perm; | |
1061 | u8 perm = *a_perm; | |
1062 | const u8 b_perm = container_of(b, struct tomoyo_path_number_acl, head) | |
1063 | ->perm; | |
1064 | if (is_delete) | |
1065 | perm &= ~b_perm; | |
1066 | else | |
1067 | perm |= b_perm; | |
1068 | *a_perm = perm; | |
1069 | return !perm; | |
1070 | } | |
1071 | ||
a1f9bb6a TH |
1072 | /** |
1073 | * tomoyo_update_path_number_acl - Update ioctl/chmod/chown/chgrp ACL. | |
1074 | * | |
1075 | * @type: Type of operation. | |
1076 | * @filename: Filename. | |
1077 | * @number: Number. | |
1078 | * @domain: Pointer to "struct tomoyo_domain_info". | |
1079 | * @is_delete: True if it is a delete request. | |
1080 | * | |
1081 | * Returns 0 on success, negative value otherwise. | |
1082 | */ | |
237ab459 TH |
1083 | static int tomoyo_update_path_number_acl(const u8 type, const char *filename, |
1084 | char *number, | |
1085 | struct tomoyo_domain_info * const | |
1086 | domain, | |
1087 | const bool is_delete) | |
a1f9bb6a | 1088 | { |
a1f9bb6a TH |
1089 | struct tomoyo_path_number_acl e = { |
1090 | .head.type = TOMOYO_TYPE_PATH_NUMBER_ACL, | |
237ab459 | 1091 | .perm = 1 << type |
a1f9bb6a TH |
1092 | }; |
1093 | int error = is_delete ? -ENOENT : -ENOMEM; | |
a1f9bb6a TH |
1094 | if (!tomoyo_parse_name_union(filename, &e.name)) |
1095 | return -EINVAL; | |
1096 | if (!tomoyo_parse_number_union(number, &e.number)) | |
1097 | goto out; | |
237ab459 TH |
1098 | error = tomoyo_update_domain(&e.head, sizeof(e), is_delete, domain, |
1099 | tomoyo_same_path_number_acl, | |
1100 | tomoyo_merge_path_number_acl); | |
a1f9bb6a TH |
1101 | out: |
1102 | tomoyo_put_name_union(&e.name); | |
1103 | tomoyo_put_number_union(&e.number); | |
1104 | return error; | |
1105 | } | |
1106 | ||
1107 | /** | |
1108 | * tomoyo_path_number_perm2 - Check permission for "create", "mkdir", "mkfifo", "mksock", "ioctl", "chmod", "chown", "chgrp". | |
1109 | * | |
1110 | * @r: Pointer to "strct tomoyo_request_info". | |
1111 | * @filename: Filename to check. | |
1112 | * @number: Number. | |
1113 | * | |
1114 | * Returns 0 on success, negative value otherwise. | |
1115 | * | |
1116 | * Caller holds tomoyo_read_lock(). | |
1117 | */ | |
1118 | static int tomoyo_path_number_perm2(struct tomoyo_request_info *r, | |
1119 | const u8 type, | |
1120 | const struct tomoyo_path_info *filename, | |
1121 | const unsigned long number) | |
1122 | { | |
1123 | char buffer[64]; | |
1124 | int error; | |
1125 | u8 radix; | |
17fcfbd9 | 1126 | const char *msg; |
a1f9bb6a TH |
1127 | |
1128 | if (!filename) | |
1129 | return 0; | |
1130 | switch (type) { | |
1131 | case TOMOYO_TYPE_CREATE: | |
1132 | case TOMOYO_TYPE_MKDIR: | |
1133 | case TOMOYO_TYPE_MKFIFO: | |
1134 | case TOMOYO_TYPE_MKSOCK: | |
1135 | case TOMOYO_TYPE_CHMOD: | |
1136 | radix = TOMOYO_VALUE_TYPE_OCTAL; | |
1137 | break; | |
1138 | case TOMOYO_TYPE_IOCTL: | |
1139 | radix = TOMOYO_VALUE_TYPE_HEXADECIMAL; | |
1140 | break; | |
1141 | default: | |
1142 | radix = TOMOYO_VALUE_TYPE_DECIMAL; | |
1143 | break; | |
1144 | } | |
1145 | tomoyo_print_ulong(buffer, sizeof(buffer), number, radix); | |
17fcfbd9 TH |
1146 | do { |
1147 | error = tomoyo_path_number_acl(r, type, filename, number); | |
1148 | if (!error) | |
1149 | break; | |
1150 | msg = tomoyo_path_number2keyword(type); | |
1151 | tomoyo_warn_log(r, "%s %s %s", msg, filename->name, buffer); | |
1152 | error = tomoyo_supervisor(r, "allow_%s %s %s\n", msg, | |
1153 | tomoyo_file_pattern(filename), | |
1154 | buffer); | |
1155 | } while (error == TOMOYO_RETRY_REQUEST); | |
a1f9bb6a TH |
1156 | return error; |
1157 | } | |
1158 | ||
1159 | /** | |
1160 | * tomoyo_path_number_perm - Check permission for "create", "mkdir", "mkfifo", "mksock", "ioctl", "chmod", "chown", "chgrp". | |
1161 | * | |
1162 | * @type: Type of operation. | |
1163 | * @path: Pointer to "struct path". | |
1164 | * @number: Number. | |
1165 | * | |
1166 | * Returns 0 on success, negative value otherwise. | |
1167 | */ | |
1168 | int tomoyo_path_number_perm(const u8 type, struct path *path, | |
1169 | unsigned long number) | |
1170 | { | |
1171 | struct tomoyo_request_info r; | |
1172 | int error = -ENOMEM; | |
c8c57e84 | 1173 | struct tomoyo_path_info buf; |
a1f9bb6a TH |
1174 | int idx; |
1175 | ||
57c2590f TH |
1176 | if (tomoyo_init_request_info(&r, NULL, tomoyo_pn2mac[type]) |
1177 | == TOMOYO_CONFIG_DISABLED || !path->mnt || !path->dentry) | |
a1f9bb6a TH |
1178 | return 0; |
1179 | idx = tomoyo_read_lock(); | |
c8c57e84 | 1180 | if (!tomoyo_get_realpath(&buf, path)) |
a1f9bb6a | 1181 | goto out; |
c8c57e84 TH |
1182 | if (type == TOMOYO_TYPE_MKDIR) |
1183 | tomoyo_add_slash(&buf); | |
1184 | error = tomoyo_path_number_perm2(&r, type, &buf, number); | |
a1f9bb6a | 1185 | out: |
c8c57e84 | 1186 | kfree(buf.name); |
a1f9bb6a TH |
1187 | tomoyo_read_unlock(idx); |
1188 | if (r.mode != TOMOYO_CONFIG_ENFORCING) | |
1189 | error = 0; | |
1190 | return error; | |
1191 | } | |
1192 | ||
b69a54ee KT |
1193 | /** |
1194 | * tomoyo_check_open_permission - Check permission for "read" and "write". | |
1195 | * | |
1196 | * @domain: Pointer to "struct tomoyo_domain_info". | |
1197 | * @path: Pointer to "struct path". | |
1198 | * @flag: Flags for open(). | |
1199 | * | |
1200 | * Returns 0 on success, negative value otherwise. | |
1201 | */ | |
1202 | int tomoyo_check_open_permission(struct tomoyo_domain_info *domain, | |
1203 | struct path *path, const int flag) | |
1204 | { | |
1205 | const u8 acc_mode = ACC_MODE(flag); | |
1206 | int error = -ENOMEM; | |
c8c57e84 | 1207 | struct tomoyo_path_info buf; |
cb0abe6a | 1208 | struct tomoyo_request_info r; |
fdb8ebb7 | 1209 | int idx; |
b69a54ee | 1210 | |
57c2590f TH |
1211 | if (!path->mnt || |
1212 | (path->dentry->d_inode && S_ISDIR(path->dentry->d_inode->i_mode))) | |
b69a54ee | 1213 | return 0; |
57c2590f TH |
1214 | buf.name = NULL; |
1215 | r.mode = TOMOYO_CONFIG_DISABLED; | |
fdb8ebb7 | 1216 | idx = tomoyo_read_lock(); |
c8c57e84 | 1217 | if (!tomoyo_get_realpath(&buf, path)) |
b69a54ee KT |
1218 | goto out; |
1219 | error = 0; | |
1220 | /* | |
1221 | * If the filename is specified by "deny_rewrite" keyword, | |
1222 | * we need to check "allow_rewrite" permission when the filename is not | |
1223 | * opened for append mode or the filename is truncated at open time. | |
1224 | */ | |
57c2590f TH |
1225 | if ((acc_mode & MAY_WRITE) && !(flag & O_APPEND) |
1226 | && tomoyo_init_request_info(&r, domain, TOMOYO_MAC_FILE_REWRITE) | |
1227 | != TOMOYO_CONFIG_DISABLED) { | |
1228 | if (!tomoyo_get_realpath(&buf, path)) { | |
1229 | error = -ENOMEM; | |
1230 | goto out; | |
1231 | } | |
1232 | if (tomoyo_is_no_rewrite_file(&buf)) | |
1233 | error = tomoyo_path_permission(&r, TOMOYO_TYPE_REWRITE, | |
1234 | &buf); | |
b69a54ee | 1235 | } |
57c2590f TH |
1236 | if (!error && acc_mode && |
1237 | tomoyo_init_request_info(&r, domain, TOMOYO_MAC_FILE_OPEN) | |
1238 | != TOMOYO_CONFIG_DISABLED) { | |
05336dee | 1239 | u8 operation; |
57c2590f TH |
1240 | if (!buf.name && !tomoyo_get_realpath(&buf, path)) { |
1241 | error = -ENOMEM; | |
1242 | goto out; | |
1243 | } | |
05336dee TH |
1244 | if (acc_mode == (MAY_READ | MAY_WRITE)) |
1245 | operation = TOMOYO_TYPE_READ_WRITE; | |
1246 | else if (acc_mode == MAY_READ) | |
1247 | operation = TOMOYO_TYPE_READ; | |
1248 | else | |
1249 | operation = TOMOYO_TYPE_WRITE; | |
1250 | error = tomoyo_path_permission(&r, operation, &buf); | |
57c2590f | 1251 | } |
b69a54ee | 1252 | out: |
c8c57e84 | 1253 | kfree(buf.name); |
fdb8ebb7 | 1254 | tomoyo_read_unlock(idx); |
cb0abe6a | 1255 | if (r.mode != TOMOYO_CONFIG_ENFORCING) |
b69a54ee KT |
1256 | error = 0; |
1257 | return error; | |
1258 | } | |
1259 | ||
1260 | /** | |
2106ccd9 | 1261 | * tomoyo_path_perm - Check permission for "unlink", "rmdir", "truncate", "symlink", "rewrite", "chroot" and "unmount". |
b69a54ee | 1262 | * |
b69a54ee KT |
1263 | * @operation: Type of operation. |
1264 | * @path: Pointer to "struct path". | |
1265 | * | |
1266 | * Returns 0 on success, negative value otherwise. | |
1267 | */ | |
97d6931e | 1268 | int tomoyo_path_perm(const u8 operation, struct path *path) |
b69a54ee KT |
1269 | { |
1270 | int error = -ENOMEM; | |
c8c57e84 | 1271 | struct tomoyo_path_info buf; |
cb0abe6a | 1272 | struct tomoyo_request_info r; |
fdb8ebb7 | 1273 | int idx; |
b69a54ee | 1274 | |
57c2590f TH |
1275 | if (!path->mnt) |
1276 | return 0; | |
1277 | if (tomoyo_init_request_info(&r, NULL, tomoyo_p2mac[operation]) | |
1278 | == TOMOYO_CONFIG_DISABLED) | |
b69a54ee | 1279 | return 0; |
57c2590f | 1280 | buf.name = NULL; |
fdb8ebb7 | 1281 | idx = tomoyo_read_lock(); |
c8c57e84 | 1282 | if (!tomoyo_get_realpath(&buf, path)) |
b69a54ee KT |
1283 | goto out; |
1284 | switch (operation) { | |
cb0abe6a | 1285 | case TOMOYO_TYPE_REWRITE: |
c8c57e84 | 1286 | if (!tomoyo_is_no_rewrite_file(&buf)) { |
cb0abe6a TH |
1287 | error = 0; |
1288 | goto out; | |
1289 | } | |
1290 | break; | |
7ef61233 TH |
1291 | case TOMOYO_TYPE_RMDIR: |
1292 | case TOMOYO_TYPE_CHROOT: | |
57c2590f | 1293 | case TOMOYO_TYPE_UMOUNT: |
c8c57e84 TH |
1294 | tomoyo_add_slash(&buf); |
1295 | break; | |
b69a54ee | 1296 | } |
c8c57e84 | 1297 | error = tomoyo_path_permission(&r, operation, &buf); |
b69a54ee | 1298 | out: |
c8c57e84 | 1299 | kfree(buf.name); |
fdb8ebb7 | 1300 | tomoyo_read_unlock(idx); |
cb0abe6a | 1301 | if (r.mode != TOMOYO_CONFIG_ENFORCING) |
b69a54ee KT |
1302 | error = 0; |
1303 | return error; | |
1304 | } | |
1305 | ||
a1f9bb6a TH |
1306 | /** |
1307 | * tomoyo_path_number3_perm2 - Check permission for path/number/number/number operation. | |
1308 | * | |
1309 | * @r: Pointer to "struct tomoyo_request_info". | |
1310 | * @operation: Type of operation. | |
1311 | * @filename: Filename to check. | |
1312 | * @mode: Create mode. | |
1313 | * @dev: Device number. | |
1314 | * | |
1315 | * Returns 0 on success, negative value otherwise. | |
1316 | * | |
1317 | * Caller holds tomoyo_read_lock(). | |
1318 | */ | |
1319 | static int tomoyo_path_number3_perm2(struct tomoyo_request_info *r, | |
1320 | const u8 operation, | |
1321 | const struct tomoyo_path_info *filename, | |
1322 | const unsigned int mode, | |
1323 | const unsigned int dev) | |
1324 | { | |
1325 | int error; | |
17fcfbd9 | 1326 | const char *msg; |
a1f9bb6a TH |
1327 | const unsigned int major = MAJOR(dev); |
1328 | const unsigned int minor = MINOR(dev); | |
1329 | ||
17fcfbd9 TH |
1330 | do { |
1331 | error = tomoyo_path_number3_acl(r, filename, 1 << operation, | |
1332 | mode, major, minor); | |
1333 | if (!error) | |
1334 | break; | |
1335 | msg = tomoyo_path_number32keyword(operation); | |
1336 | tomoyo_warn_log(r, "%s %s 0%o %u %u", msg, filename->name, | |
1337 | mode, major, minor); | |
1338 | error = tomoyo_supervisor(r, "allow_%s %s 0%o %u %u\n", msg, | |
1339 | tomoyo_file_pattern(filename), mode, | |
1340 | major, minor); | |
1341 | } while (error == TOMOYO_RETRY_REQUEST); | |
1342 | if (r->mode != TOMOYO_CONFIG_ENFORCING) | |
a1f9bb6a TH |
1343 | error = 0; |
1344 | return error; | |
1345 | } | |
1346 | ||
1347 | /** | |
1348 | * tomoyo_path_number3_perm - Check permission for "mkblock" and "mkchar". | |
1349 | * | |
1350 | * @operation: Type of operation. (TOMOYO_TYPE_MKCHAR or TOMOYO_TYPE_MKBLOCK) | |
1351 | * @path: Pointer to "struct path". | |
1352 | * @mode: Create mode. | |
1353 | * @dev: Device number. | |
1354 | * | |
1355 | * Returns 0 on success, negative value otherwise. | |
1356 | */ | |
1357 | int tomoyo_path_number3_perm(const u8 operation, struct path *path, | |
1358 | const unsigned int mode, unsigned int dev) | |
1359 | { | |
1360 | struct tomoyo_request_info r; | |
1361 | int error = -ENOMEM; | |
c8c57e84 | 1362 | struct tomoyo_path_info buf; |
a1f9bb6a TH |
1363 | int idx; |
1364 | ||
57c2590f TH |
1365 | if (!path->mnt || |
1366 | tomoyo_init_request_info(&r, NULL, tomoyo_pnnn2mac[operation]) | |
1367 | == TOMOYO_CONFIG_DISABLED) | |
a1f9bb6a TH |
1368 | return 0; |
1369 | idx = tomoyo_read_lock(); | |
1370 | error = -ENOMEM; | |
c8c57e84 TH |
1371 | if (tomoyo_get_realpath(&buf, path)) { |
1372 | error = tomoyo_path_number3_perm2(&r, operation, &buf, mode, | |
a1f9bb6a | 1373 | new_decode_dev(dev)); |
c8c57e84 | 1374 | kfree(buf.name); |
a1f9bb6a TH |
1375 | } |
1376 | tomoyo_read_unlock(idx); | |
1377 | if (r.mode != TOMOYO_CONFIG_ENFORCING) | |
1378 | error = 0; | |
1379 | return error; | |
1380 | } | |
1381 | ||
b69a54ee | 1382 | /** |
7ef61233 | 1383 | * tomoyo_path2_perm - Check permission for "rename", "link" and "pivot_root". |
b69a54ee | 1384 | * |
b69a54ee KT |
1385 | * @operation: Type of operation. |
1386 | * @path1: Pointer to "struct path". | |
1387 | * @path2: Pointer to "struct path". | |
1388 | * | |
1389 | * Returns 0 on success, negative value otherwise. | |
1390 | */ | |
97d6931e | 1391 | int tomoyo_path2_perm(const u8 operation, struct path *path1, |
7ef61233 | 1392 | struct path *path2) |
b69a54ee KT |
1393 | { |
1394 | int error = -ENOMEM; | |
17fcfbd9 | 1395 | const char *msg; |
c8c57e84 TH |
1396 | struct tomoyo_path_info buf1; |
1397 | struct tomoyo_path_info buf2; | |
cb0abe6a | 1398 | struct tomoyo_request_info r; |
fdb8ebb7 | 1399 | int idx; |
b69a54ee | 1400 | |
57c2590f TH |
1401 | if (!path1->mnt || !path2->mnt || |
1402 | tomoyo_init_request_info(&r, NULL, tomoyo_pp2mac[operation]) | |
1403 | == TOMOYO_CONFIG_DISABLED) | |
b69a54ee | 1404 | return 0; |
c8c57e84 TH |
1405 | buf1.name = NULL; |
1406 | buf2.name = NULL; | |
fdb8ebb7 | 1407 | idx = tomoyo_read_lock(); |
c8c57e84 TH |
1408 | if (!tomoyo_get_realpath(&buf1, path1) || |
1409 | !tomoyo_get_realpath(&buf2, path2)) | |
b69a54ee | 1410 | goto out; |
57c2590f TH |
1411 | switch (operation) { |
1412 | struct dentry *dentry; | |
1413 | case TOMOYO_TYPE_RENAME: | |
1414 | case TOMOYO_TYPE_LINK: | |
1415 | dentry = path1->dentry; | |
1416 | if (!dentry->d_inode || !S_ISDIR(dentry->d_inode->i_mode)) | |
1417 | break; | |
1418 | /* fall through */ | |
1419 | case TOMOYO_TYPE_PIVOT_ROOT: | |
1420 | tomoyo_add_slash(&buf1); | |
1421 | tomoyo_add_slash(&buf2); | |
1422 | break; | |
1423 | } | |
17fcfbd9 | 1424 | do { |
c8c57e84 | 1425 | error = tomoyo_path2_acl(&r, operation, &buf1, &buf2); |
17fcfbd9 TH |
1426 | if (!error) |
1427 | break; | |
1428 | msg = tomoyo_path22keyword(operation); | |
c8c57e84 | 1429 | tomoyo_warn_log(&r, "%s %s %s", msg, buf1.name, buf2.name); |
17fcfbd9 | 1430 | error = tomoyo_supervisor(&r, "allow_%s %s %s\n", msg, |
c8c57e84 TH |
1431 | tomoyo_file_pattern(&buf1), |
1432 | tomoyo_file_pattern(&buf2)); | |
17fcfbd9 | 1433 | } while (error == TOMOYO_RETRY_REQUEST); |
b69a54ee | 1434 | out: |
c8c57e84 TH |
1435 | kfree(buf1.name); |
1436 | kfree(buf2.name); | |
fdb8ebb7 | 1437 | tomoyo_read_unlock(idx); |
cb0abe6a | 1438 | if (r.mode != TOMOYO_CONFIG_ENFORCING) |
b69a54ee KT |
1439 | error = 0; |
1440 | return error; | |
1441 | } | |
a1f9bb6a TH |
1442 | |
1443 | /** | |
1444 | * tomoyo_write_file_policy - Update file related list. | |
1445 | * | |
1446 | * @data: String to parse. | |
1447 | * @domain: Pointer to "struct tomoyo_domain_info". | |
1448 | * @is_delete: True if it is a delete request. | |
1449 | * | |
1450 | * Returns 0 on success, negative value otherwise. | |
1451 | * | |
1452 | * Caller holds tomoyo_read_lock(). | |
1453 | */ | |
1454 | int tomoyo_write_file_policy(char *data, struct tomoyo_domain_info *domain, | |
1455 | const bool is_delete) | |
1456 | { | |
1457 | char *w[5]; | |
1458 | u8 type; | |
1459 | if (!tomoyo_tokenize(data, w, sizeof(w)) || !w[1][0]) | |
1460 | return -EINVAL; | |
237ab459 | 1461 | if (strncmp(w[0], "allow_", 6)) |
a1f9bb6a | 1462 | goto out; |
a1f9bb6a TH |
1463 | w[0] += 6; |
1464 | for (type = 0; type < TOMOYO_MAX_PATH_OPERATION; type++) { | |
1465 | if (strcmp(w[0], tomoyo_path_keyword[type])) | |
1466 | continue; | |
1467 | return tomoyo_update_path_acl(type, w[1], domain, is_delete); | |
1468 | } | |
1469 | if (!w[2][0]) | |
1470 | goto out; | |
1471 | for (type = 0; type < TOMOYO_MAX_PATH2_OPERATION; type++) { | |
1472 | if (strcmp(w[0], tomoyo_path2_keyword[type])) | |
1473 | continue; | |
1474 | return tomoyo_update_path2_acl(type, w[1], w[2], domain, | |
1475 | is_delete); | |
1476 | } | |
1477 | for (type = 0; type < TOMOYO_MAX_PATH_NUMBER_OPERATION; type++) { | |
1478 | if (strcmp(w[0], tomoyo_path_number_keyword[type])) | |
1479 | continue; | |
1480 | return tomoyo_update_path_number_acl(type, w[1], w[2], domain, | |
1481 | is_delete); | |
1482 | } | |
1483 | if (!w[3][0] || !w[4][0]) | |
1484 | goto out; | |
1485 | for (type = 0; type < TOMOYO_MAX_PATH_NUMBER3_OPERATION; type++) { | |
1486 | if (strcmp(w[0], tomoyo_path_number3_keyword[type])) | |
1487 | continue; | |
1488 | return tomoyo_update_path_number3_acl(type, w[1], w[2], w[3], | |
1489 | w[4], domain, is_delete); | |
1490 | } | |
1491 | out: | |
1492 | return -EINVAL; | |
1493 | } |