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 | 27 | /* Keyword array for operations with one pathname and three numbers. */ |
75093152 TH |
28 | static const char *tomoyo_mkdev_keyword |
29 | [TOMOYO_MAX_MKDEV_OPERATION] = { | |
a1f9bb6a TH |
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 | ||
75093152 | 68 | static const u8 tomoyo_pnnn2mac[TOMOYO_MAX_MKDEV_OPERATION] = { |
57c2590f TH |
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 | 135 | /** |
75093152 | 136 | * tomoyo_mkdev2keyword - Get the name of path/number/number/number operations. |
a1f9bb6a TH |
137 | * |
138 | * @operation: Type of operation. | |
139 | * | |
140 | * Returns the name of path/number/number/number operation. | |
141 | */ | |
75093152 | 142 | const char *tomoyo_mkdev2keyword(const u8 operation) |
a1f9bb6a | 143 | { |
75093152 TH |
144 | return (operation < TOMOYO_MAX_MKDEV_OPERATION) |
145 | ? tomoyo_mkdev_keyword[operation] : NULL; | |
a1f9bb6a TH |
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 | ||
99a85259 TH |
221 | /** |
222 | * tomoyo_audit_path_log - Audit path request log. | |
223 | * | |
224 | * @r: Pointer to "struct tomoyo_request_info". | |
225 | * | |
226 | * Returns 0 on success, negative value otherwise. | |
227 | */ | |
228 | static int tomoyo_audit_path_log(struct tomoyo_request_info *r) | |
229 | { | |
230 | const char *operation = tomoyo_path_keyword[r->param.path.operation]; | |
231 | const struct tomoyo_path_info *filename = r->param.path.filename; | |
232 | if (r->granted) | |
233 | return 0; | |
234 | tomoyo_warn_log(r, "%s %s", operation, filename->name); | |
235 | return tomoyo_supervisor(r, "allow_%s %s\n", operation, | |
236 | tomoyo_file_pattern(filename)); | |
237 | } | |
238 | ||
239 | /** | |
240 | * tomoyo_audit_path2_log - Audit path/path request log. | |
241 | * | |
242 | * @r: Pointer to "struct tomoyo_request_info". | |
243 | * | |
244 | * Returns 0 on success, negative value otherwise. | |
245 | */ | |
246 | static int tomoyo_audit_path2_log(struct tomoyo_request_info *r) | |
247 | { | |
248 | const char *operation = tomoyo_path2_keyword[r->param.path2.operation]; | |
249 | const struct tomoyo_path_info *filename1 = r->param.path2.filename1; | |
250 | const struct tomoyo_path_info *filename2 = r->param.path2.filename2; | |
251 | if (r->granted) | |
252 | return 0; | |
253 | tomoyo_warn_log(r, "%s %s %s", operation, filename1->name, | |
254 | filename2->name); | |
255 | return tomoyo_supervisor(r, "allow_%s %s %s\n", operation, | |
256 | tomoyo_file_pattern(filename1), | |
257 | tomoyo_file_pattern(filename2)); | |
258 | } | |
259 | ||
260 | /** | |
261 | * tomoyo_audit_mkdev_log - Audit path/number/number/number request log. | |
262 | * | |
263 | * @r: Pointer to "struct tomoyo_request_info". | |
264 | * | |
265 | * Returns 0 on success, negative value otherwise. | |
266 | */ | |
267 | static int tomoyo_audit_mkdev_log(struct tomoyo_request_info *r) | |
268 | { | |
75093152 | 269 | const char *operation = tomoyo_mkdev2keyword(r->param.mkdev. |
99a85259 TH |
270 | operation); |
271 | const struct tomoyo_path_info *filename = r->param.mkdev.filename; | |
272 | const unsigned int major = r->param.mkdev.major; | |
273 | const unsigned int minor = r->param.mkdev.minor; | |
274 | const unsigned int mode = r->param.mkdev.mode; | |
275 | if (r->granted) | |
276 | return 0; | |
277 | tomoyo_warn_log(r, "%s %s 0%o %u %u", operation, filename->name, mode, | |
278 | major, minor); | |
279 | return tomoyo_supervisor(r, "allow_%s %s 0%o %u %u\n", operation, | |
280 | tomoyo_file_pattern(filename), mode, major, | |
281 | minor); | |
282 | } | |
283 | ||
284 | /** | |
285 | * tomoyo_audit_path_number_log - Audit path/number request log. | |
286 | * | |
287 | * @r: Pointer to "struct tomoyo_request_info". | |
288 | * @error: Error code. | |
289 | * | |
290 | * Returns 0 on success, negative value otherwise. | |
291 | */ | |
292 | static int tomoyo_audit_path_number_log(struct tomoyo_request_info *r) | |
293 | { | |
294 | const u8 type = r->param.path_number.operation; | |
295 | u8 radix; | |
296 | const struct tomoyo_path_info *filename = r->param.path_number.filename; | |
297 | const char *operation = tomoyo_path_number_keyword[type]; | |
298 | char buffer[64]; | |
299 | if (r->granted) | |
300 | return 0; | |
301 | switch (type) { | |
302 | case TOMOYO_TYPE_CREATE: | |
303 | case TOMOYO_TYPE_MKDIR: | |
304 | case TOMOYO_TYPE_MKFIFO: | |
305 | case TOMOYO_TYPE_MKSOCK: | |
306 | case TOMOYO_TYPE_CHMOD: | |
307 | radix = TOMOYO_VALUE_TYPE_OCTAL; | |
308 | break; | |
309 | case TOMOYO_TYPE_IOCTL: | |
310 | radix = TOMOYO_VALUE_TYPE_HEXADECIMAL; | |
311 | break; | |
312 | default: | |
313 | radix = TOMOYO_VALUE_TYPE_DECIMAL; | |
314 | break; | |
315 | } | |
316 | tomoyo_print_ulong(buffer, sizeof(buffer), r->param.path_number.number, | |
317 | radix); | |
318 | tomoyo_warn_log(r, "%s %s %s", operation, filename->name, buffer); | |
319 | return tomoyo_supervisor(r, "allow_%s %s %s\n", operation, | |
320 | tomoyo_file_pattern(filename), buffer); | |
321 | } | |
322 | ||
7ef61233 TH |
323 | static int tomoyo_update_path2_acl(const u8 type, const char *filename1, |
324 | const char *filename2, | |
325 | struct tomoyo_domain_info *const domain, | |
326 | const bool is_delete); | |
327 | static int tomoyo_update_path_acl(const u8 type, const char *filename, | |
328 | struct tomoyo_domain_info *const domain, | |
329 | const bool is_delete); | |
b69a54ee | 330 | |
c3fa109a TH |
331 | /* |
332 | * tomoyo_globally_readable_list is used for holding list of pathnames which | |
333 | * are by default allowed to be open()ed for reading by any process. | |
334 | * | |
335 | * An entry is added by | |
336 | * | |
337 | * # echo 'allow_read /lib/libc-2.5.so' > \ | |
338 | * /sys/kernel/security/tomoyo/exception_policy | |
339 | * | |
340 | * and is deleted by | |
341 | * | |
342 | * # echo 'delete allow_read /lib/libc-2.5.so' > \ | |
343 | * /sys/kernel/security/tomoyo/exception_policy | |
344 | * | |
345 | * and all entries are retrieved by | |
346 | * | |
347 | * # grep ^allow_read /sys/kernel/security/tomoyo/exception_policy | |
348 | * | |
349 | * In the example above, any process is allowed to | |
350 | * open("/lib/libc-2.5.so", O_RDONLY). | |
351 | * One exception is, if the domain which current process belongs to is marked | |
352 | * as "ignore_global_allow_read", current process can't do so unless explicitly | |
353 | * given "allow_read /lib/libc-2.5.so" to the domain which current process | |
354 | * belongs to. | |
355 | */ | |
847b173e | 356 | LIST_HEAD(tomoyo_globally_readable_list); |
b69a54ee | 357 | |
36f5e1ff TH |
358 | static bool tomoyo_same_globally_readable(const struct tomoyo_acl_head *a, |
359 | const struct tomoyo_acl_head *b) | |
360 | { | |
361 | return container_of(a, struct tomoyo_globally_readable_file_entry, | |
362 | head)->filename == | |
363 | container_of(b, struct tomoyo_globally_readable_file_entry, | |
364 | head)->filename; | |
365 | } | |
366 | ||
b69a54ee KT |
367 | /** |
368 | * tomoyo_update_globally_readable_entry - Update "struct tomoyo_globally_readable_file_entry" list. | |
369 | * | |
370 | * @filename: Filename unconditionally permitted to open() for reading. | |
371 | * @is_delete: True if it is a delete request. | |
372 | * | |
373 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
374 | * |
375 | * Caller holds tomoyo_read_lock(). | |
b69a54ee KT |
376 | */ |
377 | static int tomoyo_update_globally_readable_entry(const char *filename, | |
378 | const bool is_delete) | |
379 | { | |
9e4b50e9 | 380 | struct tomoyo_globally_readable_file_entry e = { }; |
36f5e1ff | 381 | int error; |
b69a54ee | 382 | |
75093152 | 383 | if (!tomoyo_correct_word(filename)) |
b69a54ee | 384 | return -EINVAL; |
9e4b50e9 TH |
385 | e.filename = tomoyo_get_name(filename); |
386 | if (!e.filename) | |
b69a54ee | 387 | return -ENOMEM; |
36f5e1ff TH |
388 | error = tomoyo_update_policy(&e.head, sizeof(e), is_delete, |
389 | &tomoyo_globally_readable_list, | |
390 | tomoyo_same_globally_readable); | |
9e4b50e9 | 391 | tomoyo_put_name(e.filename); |
b69a54ee KT |
392 | return error; |
393 | } | |
394 | ||
395 | /** | |
75093152 | 396 | * tomoyo_globally_readable_file - Check if the file is unconditionnaly permitted to be open()ed for reading. |
b69a54ee KT |
397 | * |
398 | * @filename: The filename to check. | |
399 | * | |
400 | * Returns true if any domain can open @filename for reading, false otherwise. | |
fdb8ebb7 TH |
401 | * |
402 | * Caller holds tomoyo_read_lock(). | |
b69a54ee | 403 | */ |
75093152 | 404 | static bool tomoyo_globally_readable_file(const struct tomoyo_path_info * |
b69a54ee KT |
405 | filename) |
406 | { | |
407 | struct tomoyo_globally_readable_file_entry *ptr; | |
408 | bool found = false; | |
fdb8ebb7 | 409 | |
82e0f001 TH |
410 | list_for_each_entry_rcu(ptr, &tomoyo_globally_readable_list, |
411 | head.list) { | |
412 | if (!ptr->head.is_deleted && | |
b69a54ee KT |
413 | tomoyo_path_matches_pattern(filename, ptr->filename)) { |
414 | found = true; | |
415 | break; | |
416 | } | |
417 | } | |
b69a54ee KT |
418 | return found; |
419 | } | |
420 | ||
421 | /** | |
422 | * tomoyo_write_globally_readable_policy - Write "struct tomoyo_globally_readable_file_entry" list. | |
423 | * | |
424 | * @data: String to parse. | |
425 | * @is_delete: True if it is a delete request. | |
426 | * | |
427 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
428 | * |
429 | * Caller holds tomoyo_read_lock(). | |
b69a54ee KT |
430 | */ |
431 | int tomoyo_write_globally_readable_policy(char *data, const bool is_delete) | |
432 | { | |
433 | return tomoyo_update_globally_readable_entry(data, is_delete); | |
434 | } | |
435 | ||
436 | /** | |
437 | * tomoyo_read_globally_readable_policy - Read "struct tomoyo_globally_readable_file_entry" list. | |
438 | * | |
439 | * @head: Pointer to "struct tomoyo_io_buffer". | |
440 | * | |
441 | * Returns true on success, false otherwise. | |
fdb8ebb7 TH |
442 | * |
443 | * Caller holds tomoyo_read_lock(). | |
b69a54ee KT |
444 | */ |
445 | bool tomoyo_read_globally_readable_policy(struct tomoyo_io_buffer *head) | |
446 | { | |
447 | struct list_head *pos; | |
448 | bool done = true; | |
449 | ||
b69a54ee KT |
450 | list_for_each_cookie(pos, head->read_var2, |
451 | &tomoyo_globally_readable_list) { | |
452 | struct tomoyo_globally_readable_file_entry *ptr; | |
453 | ptr = list_entry(pos, | |
454 | struct tomoyo_globally_readable_file_entry, | |
82e0f001 TH |
455 | head.list); |
456 | if (ptr->head.is_deleted) | |
b69a54ee | 457 | continue; |
7d2948b1 TH |
458 | done = tomoyo_io_printf(head, TOMOYO_KEYWORD_ALLOW_READ "%s\n", |
459 | ptr->filename->name); | |
460 | if (!done) | |
b69a54ee | 461 | break; |
b69a54ee | 462 | } |
b69a54ee KT |
463 | return done; |
464 | } | |
465 | ||
c3fa109a TH |
466 | /* tomoyo_pattern_list is used for holding list of pathnames which are used for |
467 | * converting pathnames to pathname patterns during learning mode. | |
468 | * | |
469 | * An entry is added by | |
470 | * | |
471 | * # echo 'file_pattern /proc/\$/mounts' > \ | |
472 | * /sys/kernel/security/tomoyo/exception_policy | |
473 | * | |
474 | * and is deleted by | |
475 | * | |
476 | * # echo 'delete file_pattern /proc/\$/mounts' > \ | |
477 | * /sys/kernel/security/tomoyo/exception_policy | |
478 | * | |
479 | * and all entries are retrieved by | |
480 | * | |
481 | * # grep ^file_pattern /sys/kernel/security/tomoyo/exception_policy | |
482 | * | |
483 | * In the example above, if a process which belongs to a domain which is in | |
484 | * learning mode requested open("/proc/1/mounts", O_RDONLY), | |
485 | * "allow_read /proc/\$/mounts" is automatically added to the domain which that | |
486 | * process belongs to. | |
487 | * | |
488 | * It is not a desirable behavior that we have to use /proc/\$/ instead of | |
489 | * /proc/self/ when current process needs to access only current process's | |
490 | * information. As of now, LSM version of TOMOYO is using __d_path() for | |
491 | * calculating pathname. Non LSM version of TOMOYO is using its own function | |
492 | * which pretends as if /proc/self/ is not a symlink; so that we can forbid | |
493 | * current process from accessing other process's information. | |
494 | */ | |
847b173e | 495 | LIST_HEAD(tomoyo_pattern_list); |
b69a54ee | 496 | |
36f5e1ff TH |
497 | static bool tomoyo_same_pattern(const struct tomoyo_acl_head *a, |
498 | const struct tomoyo_acl_head *b) | |
499 | { | |
500 | return container_of(a, struct tomoyo_pattern_entry, head)->pattern == | |
501 | container_of(b, struct tomoyo_pattern_entry, head)->pattern; | |
502 | } | |
503 | ||
b69a54ee KT |
504 | /** |
505 | * tomoyo_update_file_pattern_entry - Update "struct tomoyo_pattern_entry" list. | |
506 | * | |
507 | * @pattern: Pathname pattern. | |
508 | * @is_delete: True if it is a delete request. | |
509 | * | |
510 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
511 | * |
512 | * Caller holds tomoyo_read_lock(). | |
b69a54ee KT |
513 | */ |
514 | static int tomoyo_update_file_pattern_entry(const char *pattern, | |
515 | const bool is_delete) | |
516 | { | |
3f629636 | 517 | struct tomoyo_pattern_entry e = { }; |
36f5e1ff | 518 | int error; |
b69a54ee | 519 | |
75093152 | 520 | if (!tomoyo_correct_word(pattern)) |
3f629636 TH |
521 | return -EINVAL; |
522 | e.pattern = tomoyo_get_name(pattern); | |
9e4b50e9 | 523 | if (!e.pattern) |
36f5e1ff TH |
524 | return -ENOMEM; |
525 | error = tomoyo_update_policy(&e.head, sizeof(e), is_delete, | |
526 | &tomoyo_pattern_list, | |
527 | tomoyo_same_pattern); | |
9e4b50e9 | 528 | tomoyo_put_name(e.pattern); |
b69a54ee KT |
529 | return error; |
530 | } | |
531 | ||
532 | /** | |
17fcfbd9 | 533 | * tomoyo_file_pattern - Get patterned pathname. |
b69a54ee KT |
534 | * |
535 | * @filename: The filename to find patterned pathname. | |
536 | * | |
537 | * Returns pointer to pathname pattern if matched, @filename otherwise. | |
fdb8ebb7 TH |
538 | * |
539 | * Caller holds tomoyo_read_lock(). | |
b69a54ee | 540 | */ |
17fcfbd9 | 541 | const char *tomoyo_file_pattern(const struct tomoyo_path_info *filename) |
b69a54ee KT |
542 | { |
543 | struct tomoyo_pattern_entry *ptr; | |
544 | const struct tomoyo_path_info *pattern = NULL; | |
545 | ||
82e0f001 TH |
546 | list_for_each_entry_rcu(ptr, &tomoyo_pattern_list, head.list) { |
547 | if (ptr->head.is_deleted) | |
b69a54ee KT |
548 | continue; |
549 | if (!tomoyo_path_matches_pattern(filename, ptr->pattern)) | |
550 | continue; | |
551 | pattern = ptr->pattern; | |
552 | if (tomoyo_strendswith(pattern->name, "/\\*")) { | |
553 | /* Do nothing. Try to find the better match. */ | |
554 | } else { | |
555 | /* This would be the better match. Use this. */ | |
556 | break; | |
557 | } | |
558 | } | |
b69a54ee KT |
559 | if (pattern) |
560 | filename = pattern; | |
17fcfbd9 | 561 | return filename->name; |
b69a54ee KT |
562 | } |
563 | ||
564 | /** | |
565 | * tomoyo_write_pattern_policy - Write "struct tomoyo_pattern_entry" list. | |
566 | * | |
567 | * @data: String to parse. | |
568 | * @is_delete: True if it is a delete request. | |
569 | * | |
570 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
571 | * |
572 | * Caller holds tomoyo_read_lock(). | |
b69a54ee KT |
573 | */ |
574 | int tomoyo_write_pattern_policy(char *data, const bool is_delete) | |
575 | { | |
576 | return tomoyo_update_file_pattern_entry(data, is_delete); | |
577 | } | |
578 | ||
579 | /** | |
580 | * tomoyo_read_file_pattern - Read "struct tomoyo_pattern_entry" list. | |
581 | * | |
582 | * @head: Pointer to "struct tomoyo_io_buffer". | |
583 | * | |
584 | * Returns true on success, false otherwise. | |
fdb8ebb7 TH |
585 | * |
586 | * Caller holds tomoyo_read_lock(). | |
b69a54ee KT |
587 | */ |
588 | bool tomoyo_read_file_pattern(struct tomoyo_io_buffer *head) | |
589 | { | |
590 | struct list_head *pos; | |
591 | bool done = true; | |
592 | ||
b69a54ee KT |
593 | list_for_each_cookie(pos, head->read_var2, &tomoyo_pattern_list) { |
594 | struct tomoyo_pattern_entry *ptr; | |
82e0f001 TH |
595 | ptr = list_entry(pos, struct tomoyo_pattern_entry, head.list); |
596 | if (ptr->head.is_deleted) | |
b69a54ee | 597 | continue; |
7d2948b1 TH |
598 | done = tomoyo_io_printf(head, TOMOYO_KEYWORD_FILE_PATTERN |
599 | "%s\n", ptr->pattern->name); | |
600 | if (!done) | |
b69a54ee | 601 | break; |
b69a54ee | 602 | } |
b69a54ee KT |
603 | return done; |
604 | } | |
605 | ||
c3fa109a TH |
606 | /* |
607 | * tomoyo_no_rewrite_list is used for holding list of pathnames which are by | |
608 | * default forbidden to modify already written content of a file. | |
609 | * | |
610 | * An entry is added by | |
611 | * | |
612 | * # echo 'deny_rewrite /var/log/messages' > \ | |
613 | * /sys/kernel/security/tomoyo/exception_policy | |
614 | * | |
615 | * and is deleted by | |
616 | * | |
617 | * # echo 'delete deny_rewrite /var/log/messages' > \ | |
618 | * /sys/kernel/security/tomoyo/exception_policy | |
619 | * | |
620 | * and all entries are retrieved by | |
621 | * | |
622 | * # grep ^deny_rewrite /sys/kernel/security/tomoyo/exception_policy | |
623 | * | |
624 | * In the example above, if a process requested to rewrite /var/log/messages , | |
625 | * the process can't rewrite unless the domain which that process belongs to | |
626 | * has "allow_rewrite /var/log/messages" entry. | |
627 | * | |
628 | * It is not a desirable behavior that we have to add "\040(deleted)" suffix | |
629 | * when we want to allow rewriting already unlink()ed file. As of now, | |
630 | * LSM version of TOMOYO is using __d_path() for calculating pathname. | |
631 | * Non LSM version of TOMOYO is using its own function which doesn't append | |
632 | * " (deleted)" suffix if the file is already unlink()ed; so that we don't | |
633 | * need to worry whether the file is already unlink()ed or not. | |
634 | */ | |
847b173e | 635 | LIST_HEAD(tomoyo_no_rewrite_list); |
b69a54ee | 636 | |
36f5e1ff TH |
637 | static bool tomoyo_same_no_rewrite(const struct tomoyo_acl_head *a, |
638 | const struct tomoyo_acl_head *b) | |
639 | { | |
640 | return container_of(a, struct tomoyo_no_rewrite_entry, head)->pattern | |
641 | == container_of(b, struct tomoyo_no_rewrite_entry, head) | |
642 | ->pattern; | |
643 | } | |
644 | ||
b69a54ee KT |
645 | /** |
646 | * tomoyo_update_no_rewrite_entry - Update "struct tomoyo_no_rewrite_entry" list. | |
647 | * | |
648 | * @pattern: Pathname pattern that are not rewritable by default. | |
649 | * @is_delete: True if it is a delete request. | |
650 | * | |
651 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
652 | * |
653 | * Caller holds tomoyo_read_lock(). | |
b69a54ee KT |
654 | */ |
655 | static int tomoyo_update_no_rewrite_entry(const char *pattern, | |
656 | const bool is_delete) | |
657 | { | |
9e4b50e9 | 658 | struct tomoyo_no_rewrite_entry e = { }; |
36f5e1ff | 659 | int error; |
b69a54ee | 660 | |
75093152 | 661 | if (!tomoyo_correct_word(pattern)) |
b69a54ee | 662 | return -EINVAL; |
9e4b50e9 TH |
663 | e.pattern = tomoyo_get_name(pattern); |
664 | if (!e.pattern) | |
36f5e1ff TH |
665 | return -ENOMEM; |
666 | error = tomoyo_update_policy(&e.head, sizeof(e), is_delete, | |
667 | &tomoyo_no_rewrite_list, | |
668 | tomoyo_same_no_rewrite); | |
9e4b50e9 | 669 | tomoyo_put_name(e.pattern); |
b69a54ee KT |
670 | return error; |
671 | } | |
672 | ||
673 | /** | |
75093152 | 674 | * tomoyo_no_rewrite_file - Check if the given pathname is not permitted to be rewrited. |
b69a54ee KT |
675 | * |
676 | * @filename: Filename to check. | |
677 | * | |
678 | * Returns true if @filename is specified by "deny_rewrite" directive, | |
679 | * false otherwise. | |
fdb8ebb7 TH |
680 | * |
681 | * Caller holds tomoyo_read_lock(). | |
b69a54ee | 682 | */ |
75093152 | 683 | static bool tomoyo_no_rewrite_file(const struct tomoyo_path_info *filename) |
b69a54ee KT |
684 | { |
685 | struct tomoyo_no_rewrite_entry *ptr; | |
686 | bool found = false; | |
687 | ||
82e0f001 TH |
688 | list_for_each_entry_rcu(ptr, &tomoyo_no_rewrite_list, head.list) { |
689 | if (ptr->head.is_deleted) | |
b69a54ee KT |
690 | continue; |
691 | if (!tomoyo_path_matches_pattern(filename, ptr->pattern)) | |
692 | continue; | |
693 | found = true; | |
694 | break; | |
695 | } | |
b69a54ee KT |
696 | return found; |
697 | } | |
698 | ||
699 | /** | |
700 | * tomoyo_write_no_rewrite_policy - Write "struct tomoyo_no_rewrite_entry" list. | |
701 | * | |
702 | * @data: String to parse. | |
703 | * @is_delete: True if it is a delete request. | |
704 | * | |
705 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
706 | * |
707 | * Caller holds tomoyo_read_lock(). | |
b69a54ee KT |
708 | */ |
709 | int tomoyo_write_no_rewrite_policy(char *data, const bool is_delete) | |
710 | { | |
711 | return tomoyo_update_no_rewrite_entry(data, is_delete); | |
712 | } | |
713 | ||
714 | /** | |
715 | * tomoyo_read_no_rewrite_policy - Read "struct tomoyo_no_rewrite_entry" list. | |
716 | * | |
717 | * @head: Pointer to "struct tomoyo_io_buffer". | |
718 | * | |
719 | * Returns true on success, false otherwise. | |
fdb8ebb7 TH |
720 | * |
721 | * Caller holds tomoyo_read_lock(). | |
b69a54ee KT |
722 | */ |
723 | bool tomoyo_read_no_rewrite_policy(struct tomoyo_io_buffer *head) | |
724 | { | |
725 | struct list_head *pos; | |
726 | bool done = true; | |
727 | ||
b69a54ee KT |
728 | list_for_each_cookie(pos, head->read_var2, &tomoyo_no_rewrite_list) { |
729 | struct tomoyo_no_rewrite_entry *ptr; | |
82e0f001 TH |
730 | ptr = list_entry(pos, struct tomoyo_no_rewrite_entry, |
731 | head.list); | |
732 | if (ptr->head.is_deleted) | |
b69a54ee | 733 | continue; |
7d2948b1 TH |
734 | done = tomoyo_io_printf(head, TOMOYO_KEYWORD_DENY_REWRITE |
735 | "%s\n", ptr->pattern->name); | |
736 | if (!done) | |
b69a54ee | 737 | break; |
b69a54ee | 738 | } |
b69a54ee KT |
739 | return done; |
740 | } | |
741 | ||
99a85259 TH |
742 | static bool tomoyo_check_path_acl(const struct tomoyo_request_info *r, |
743 | const struct tomoyo_acl_info *ptr) | |
b69a54ee | 744 | { |
99a85259 TH |
745 | const struct tomoyo_path_acl *acl = container_of(ptr, typeof(*acl), |
746 | head); | |
747 | return (acl->perm & (1 << r->param.path.operation)) && | |
748 | tomoyo_compare_name_union(r->param.path.filename, &acl->name); | |
749 | } | |
b69a54ee | 750 | |
99a85259 TH |
751 | static bool tomoyo_check_path_number_acl(const struct tomoyo_request_info *r, |
752 | const struct tomoyo_acl_info *ptr) | |
753 | { | |
754 | const struct tomoyo_path_number_acl *acl = | |
755 | container_of(ptr, typeof(*acl), head); | |
756 | return (acl->perm & (1 << r->param.path_number.operation)) && | |
757 | tomoyo_compare_number_union(r->param.path_number.number, | |
758 | &acl->number) && | |
759 | tomoyo_compare_name_union(r->param.path_number.filename, | |
760 | &acl->name); | |
761 | } | |
762 | ||
763 | static bool tomoyo_check_path2_acl(const struct tomoyo_request_info *r, | |
764 | const struct tomoyo_acl_info *ptr) | |
765 | { | |
766 | const struct tomoyo_path2_acl *acl = | |
767 | container_of(ptr, typeof(*acl), head); | |
768 | return (acl->perm & (1 << r->param.path2.operation)) && | |
769 | tomoyo_compare_name_union(r->param.path2.filename1, &acl->name1) | |
770 | && tomoyo_compare_name_union(r->param.path2.filename2, | |
771 | &acl->name2); | |
772 | } | |
773 | ||
774 | static bool tomoyo_check_mkdev_acl(const struct tomoyo_request_info *r, | |
775 | const struct tomoyo_acl_info *ptr) | |
776 | { | |
75093152 | 777 | const struct tomoyo_mkdev_acl *acl = |
99a85259 TH |
778 | container_of(ptr, typeof(*acl), head); |
779 | return (acl->perm & (1 << r->param.mkdev.operation)) && | |
780 | tomoyo_compare_number_union(r->param.mkdev.mode, | |
781 | &acl->mode) && | |
782 | tomoyo_compare_number_union(r->param.mkdev.major, | |
783 | &acl->major) && | |
784 | tomoyo_compare_number_union(r->param.mkdev.minor, | |
785 | &acl->minor) && | |
786 | tomoyo_compare_name_union(r->param.mkdev.filename, | |
787 | &acl->name); | |
b69a54ee KT |
788 | } |
789 | ||
237ab459 TH |
790 | static bool tomoyo_same_path_acl(const struct tomoyo_acl_info *a, |
791 | const struct tomoyo_acl_info *b) | |
792 | { | |
793 | const struct tomoyo_path_acl *p1 = container_of(a, typeof(*p1), head); | |
794 | const struct tomoyo_path_acl *p2 = container_of(b, typeof(*p2), head); | |
75093152 TH |
795 | return tomoyo_same_acl_head(&p1->head, &p2->head) && |
796 | tomoyo_same_name_union(&p1->name, &p2->name); | |
237ab459 TH |
797 | } |
798 | ||
799 | static bool tomoyo_merge_path_acl(struct tomoyo_acl_info *a, | |
800 | struct tomoyo_acl_info *b, | |
801 | const bool is_delete) | |
802 | { | |
803 | u16 * const a_perm = &container_of(a, struct tomoyo_path_acl, head) | |
804 | ->perm; | |
805 | u16 perm = *a_perm; | |
806 | const u16 b_perm = container_of(b, struct tomoyo_path_acl, head)->perm; | |
807 | if (is_delete) { | |
808 | perm &= ~b_perm; | |
809 | if ((perm & TOMOYO_RW_MASK) != TOMOYO_RW_MASK) | |
810 | perm &= ~(1 << TOMOYO_TYPE_READ_WRITE); | |
811 | else if (!(perm & (1 << TOMOYO_TYPE_READ_WRITE))) | |
812 | perm &= ~TOMOYO_RW_MASK; | |
813 | } else { | |
814 | perm |= b_perm; | |
815 | if ((perm & TOMOYO_RW_MASK) == TOMOYO_RW_MASK) | |
816 | perm |= (1 << TOMOYO_TYPE_READ_WRITE); | |
817 | else if (perm & (1 << TOMOYO_TYPE_READ_WRITE)) | |
818 | perm |= TOMOYO_RW_MASK; | |
819 | } | |
820 | *a_perm = perm; | |
821 | return !perm; | |
822 | } | |
823 | ||
b69a54ee | 824 | /** |
7ef61233 | 825 | * tomoyo_update_path_acl - Update "struct tomoyo_path_acl" list. |
b69a54ee KT |
826 | * |
827 | * @type: Type of operation. | |
828 | * @filename: Filename. | |
829 | * @domain: Pointer to "struct tomoyo_domain_info". | |
830 | * @is_delete: True if it is a delete request. | |
831 | * | |
832 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
833 | * |
834 | * Caller holds tomoyo_read_lock(). | |
b69a54ee | 835 | */ |
7ef61233 | 836 | static int tomoyo_update_path_acl(const u8 type, const char *filename, |
237ab459 | 837 | struct tomoyo_domain_info * const domain, |
7ef61233 | 838 | const bool is_delete) |
b69a54ee | 839 | { |
9e4b50e9 TH |
840 | struct tomoyo_path_acl e = { |
841 | .head.type = TOMOYO_TYPE_PATH_ACL, | |
237ab459 | 842 | .perm = 1 << type |
9e4b50e9 | 843 | }; |
237ab459 TH |
844 | int error; |
845 | if (e.perm == (1 << TOMOYO_TYPE_READ_WRITE)) | |
846 | e.perm |= TOMOYO_RW_MASK; | |
7762fbff | 847 | if (!tomoyo_parse_name_union(filename, &e.name)) |
b69a54ee | 848 | return -EINVAL; |
237ab459 TH |
849 | error = tomoyo_update_domain(&e.head, sizeof(e), is_delete, domain, |
850 | tomoyo_same_path_acl, | |
851 | tomoyo_merge_path_acl); | |
7762fbff | 852 | tomoyo_put_name_union(&e.name); |
b69a54ee KT |
853 | return error; |
854 | } | |
855 | ||
75093152 | 856 | static bool tomoyo_same_mkdev_acl(const struct tomoyo_acl_info *a, |
237ab459 TH |
857 | const struct tomoyo_acl_info *b) |
858 | { | |
75093152 | 859 | const struct tomoyo_mkdev_acl *p1 = container_of(a, typeof(*p1), |
237ab459 | 860 | head); |
75093152 | 861 | const struct tomoyo_mkdev_acl *p2 = container_of(b, typeof(*p2), |
237ab459 | 862 | head); |
75093152 TH |
863 | return tomoyo_same_acl_head(&p1->head, &p2->head) |
864 | && tomoyo_same_name_union(&p1->name, &p2->name) | |
865 | && tomoyo_same_number_union(&p1->mode, &p2->mode) | |
866 | && tomoyo_same_number_union(&p1->major, &p2->major) | |
867 | && tomoyo_same_number_union(&p1->minor, &p2->minor); | |
237ab459 TH |
868 | } |
869 | ||
75093152 | 870 | static bool tomoyo_merge_mkdev_acl(struct tomoyo_acl_info *a, |
237ab459 TH |
871 | struct tomoyo_acl_info *b, |
872 | const bool is_delete) | |
873 | { | |
75093152 | 874 | u8 *const a_perm = &container_of(a, struct tomoyo_mkdev_acl, |
237ab459 TH |
875 | head)->perm; |
876 | u8 perm = *a_perm; | |
75093152 | 877 | const u8 b_perm = container_of(b, struct tomoyo_mkdev_acl, head) |
237ab459 TH |
878 | ->perm; |
879 | if (is_delete) | |
880 | perm &= ~b_perm; | |
881 | else | |
882 | perm |= b_perm; | |
883 | *a_perm = perm; | |
884 | return !perm; | |
885 | } | |
886 | ||
a1f9bb6a | 887 | /** |
75093152 | 888 | * tomoyo_update_mkdev_acl - Update "struct tomoyo_mkdev_acl" list. |
a1f9bb6a TH |
889 | * |
890 | * @type: Type of operation. | |
891 | * @filename: Filename. | |
892 | * @mode: Create mode. | |
893 | * @major: Device major number. | |
894 | * @minor: Device minor number. | |
895 | * @domain: Pointer to "struct tomoyo_domain_info". | |
896 | * @is_delete: True if it is a delete request. | |
897 | * | |
898 | * Returns 0 on success, negative value otherwise. | |
237ab459 TH |
899 | * |
900 | * Caller holds tomoyo_read_lock(). | |
a1f9bb6a | 901 | */ |
75093152 | 902 | static int tomoyo_update_mkdev_acl(const u8 type, const char *filename, |
237ab459 TH |
903 | char *mode, char *major, char *minor, |
904 | struct tomoyo_domain_info * const | |
905 | domain, const bool is_delete) | |
a1f9bb6a | 906 | { |
75093152 TH |
907 | struct tomoyo_mkdev_acl e = { |
908 | .head.type = TOMOYO_TYPE_MKDEV_ACL, | |
237ab459 | 909 | .perm = 1 << type |
a1f9bb6a TH |
910 | }; |
911 | int error = is_delete ? -ENOENT : -ENOMEM; | |
912 | if (!tomoyo_parse_name_union(filename, &e.name) || | |
913 | !tomoyo_parse_number_union(mode, &e.mode) || | |
914 | !tomoyo_parse_number_union(major, &e.major) || | |
915 | !tomoyo_parse_number_union(minor, &e.minor)) | |
916 | goto out; | |
237ab459 | 917 | error = tomoyo_update_domain(&e.head, sizeof(e), is_delete, domain, |
75093152 TH |
918 | tomoyo_same_mkdev_acl, |
919 | tomoyo_merge_mkdev_acl); | |
a1f9bb6a TH |
920 | out: |
921 | tomoyo_put_name_union(&e.name); | |
922 | tomoyo_put_number_union(&e.mode); | |
923 | tomoyo_put_number_union(&e.major); | |
924 | tomoyo_put_number_union(&e.minor); | |
925 | return error; | |
926 | } | |
927 | ||
237ab459 TH |
928 | static bool tomoyo_same_path2_acl(const struct tomoyo_acl_info *a, |
929 | const struct tomoyo_acl_info *b) | |
930 | { | |
931 | const struct tomoyo_path2_acl *p1 = container_of(a, typeof(*p1), head); | |
932 | const struct tomoyo_path2_acl *p2 = container_of(b, typeof(*p2), head); | |
75093152 TH |
933 | return tomoyo_same_acl_head(&p1->head, &p2->head) |
934 | && tomoyo_same_name_union(&p1->name1, &p2->name1) | |
935 | && tomoyo_same_name_union(&p1->name2, &p2->name2); | |
237ab459 TH |
936 | } |
937 | ||
938 | static bool tomoyo_merge_path2_acl(struct tomoyo_acl_info *a, | |
939 | struct tomoyo_acl_info *b, | |
940 | const bool is_delete) | |
941 | { | |
942 | u8 * const a_perm = &container_of(a, struct tomoyo_path2_acl, head) | |
943 | ->perm; | |
944 | u8 perm = *a_perm; | |
945 | const u8 b_perm = container_of(b, struct tomoyo_path2_acl, head)->perm; | |
946 | if (is_delete) | |
947 | perm &= ~b_perm; | |
948 | else | |
949 | perm |= b_perm; | |
950 | *a_perm = perm; | |
951 | return !perm; | |
952 | } | |
953 | ||
b69a54ee | 954 | /** |
7ef61233 | 955 | * tomoyo_update_path2_acl - Update "struct tomoyo_path2_acl" list. |
b69a54ee KT |
956 | * |
957 | * @type: Type of operation. | |
958 | * @filename1: First filename. | |
959 | * @filename2: Second filename. | |
960 | * @domain: Pointer to "struct tomoyo_domain_info". | |
961 | * @is_delete: True if it is a delete request. | |
962 | * | |
963 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
964 | * |
965 | * Caller holds tomoyo_read_lock(). | |
b69a54ee | 966 | */ |
7ef61233 TH |
967 | static int tomoyo_update_path2_acl(const u8 type, const char *filename1, |
968 | const char *filename2, | |
237ab459 | 969 | struct tomoyo_domain_info * const domain, |
7ef61233 | 970 | const bool is_delete) |
b69a54ee | 971 | { |
9e4b50e9 TH |
972 | struct tomoyo_path2_acl e = { |
973 | .head.type = TOMOYO_TYPE_PATH2_ACL, | |
237ab459 | 974 | .perm = 1 << type |
9e4b50e9 | 975 | }; |
ca0b7df3 | 976 | int error = is_delete ? -ENOENT : -ENOMEM; |
7762fbff TH |
977 | if (!tomoyo_parse_name_union(filename1, &e.name1) || |
978 | !tomoyo_parse_name_union(filename2, &e.name2)) | |
ca0b7df3 | 979 | goto out; |
237ab459 TH |
980 | error = tomoyo_update_domain(&e.head, sizeof(e), is_delete, domain, |
981 | tomoyo_same_path2_acl, | |
982 | tomoyo_merge_path2_acl); | |
ca0b7df3 | 983 | out: |
7762fbff TH |
984 | tomoyo_put_name_union(&e.name1); |
985 | tomoyo_put_name_union(&e.name2); | |
b69a54ee KT |
986 | return error; |
987 | } | |
988 | ||
b69a54ee | 989 | /** |
cb0abe6a | 990 | * tomoyo_path_permission - Check permission for single path operation. |
b69a54ee | 991 | * |
cb0abe6a | 992 | * @r: Pointer to "struct tomoyo_request_info". |
b69a54ee KT |
993 | * @operation: Type of operation. |
994 | * @filename: Filename to check. | |
b69a54ee KT |
995 | * |
996 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
997 | * |
998 | * Caller holds tomoyo_read_lock(). | |
b69a54ee | 999 | */ |
05336dee TH |
1000 | int tomoyo_path_permission(struct tomoyo_request_info *r, u8 operation, |
1001 | const struct tomoyo_path_info *filename) | |
b69a54ee | 1002 | { |
b69a54ee | 1003 | int error; |
b69a54ee | 1004 | |
b69a54ee | 1005 | next: |
57c2590f TH |
1006 | r->type = tomoyo_p2mac[operation]; |
1007 | r->mode = tomoyo_get_mode(r->profile, r->type); | |
1008 | if (r->mode == TOMOYO_CONFIG_DISABLED) | |
1009 | return 0; | |
cf6e9a64 TH |
1010 | r->param_type = TOMOYO_TYPE_PATH_ACL; |
1011 | r->param.path.filename = filename; | |
1012 | r->param.path.operation = operation; | |
17fcfbd9 | 1013 | do { |
99a85259 TH |
1014 | tomoyo_check_acl(r, tomoyo_check_path_acl); |
1015 | if (!r->granted && operation == TOMOYO_TYPE_READ && | |
05336dee | 1016 | !r->domain->ignore_global_allow_read && |
75093152 | 1017 | tomoyo_globally_readable_file(filename)) |
99a85259 TH |
1018 | r->granted = true; |
1019 | error = tomoyo_audit_path_log(r); | |
05336dee TH |
1020 | /* |
1021 | * Do not retry for execute request, for alias may have | |
1022 | * changed. | |
1023 | */ | |
1024 | } while (error == TOMOYO_RETRY_REQUEST && | |
1025 | operation != TOMOYO_TYPE_EXECUTE); | |
b69a54ee KT |
1026 | /* |
1027 | * Since "allow_truncate" doesn't imply "allow_rewrite" permission, | |
1028 | * we need to check "allow_rewrite" permission if the filename is | |
1029 | * specified by "deny_rewrite" keyword. | |
1030 | */ | |
7ef61233 | 1031 | if (!error && operation == TOMOYO_TYPE_TRUNCATE && |
75093152 | 1032 | tomoyo_no_rewrite_file(filename)) { |
7ef61233 | 1033 | operation = TOMOYO_TYPE_REWRITE; |
b69a54ee KT |
1034 | goto next; |
1035 | } | |
1036 | return error; | |
1037 | } | |
1038 | ||
237ab459 TH |
1039 | static bool tomoyo_same_path_number_acl(const struct tomoyo_acl_info *a, |
1040 | const struct tomoyo_acl_info *b) | |
1041 | { | |
1042 | const struct tomoyo_path_number_acl *p1 = container_of(a, typeof(*p1), | |
1043 | head); | |
1044 | const struct tomoyo_path_number_acl *p2 = container_of(b, typeof(*p2), | |
1045 | head); | |
75093152 TH |
1046 | return tomoyo_same_acl_head(&p1->head, &p2->head) |
1047 | && tomoyo_same_name_union(&p1->name, &p2->name) | |
1048 | && tomoyo_same_number_union(&p1->number, &p2->number); | |
237ab459 TH |
1049 | } |
1050 | ||
1051 | static bool tomoyo_merge_path_number_acl(struct tomoyo_acl_info *a, | |
1052 | struct tomoyo_acl_info *b, | |
1053 | const bool is_delete) | |
1054 | { | |
1055 | u8 * const a_perm = &container_of(a, struct tomoyo_path_number_acl, | |
1056 | head)->perm; | |
1057 | u8 perm = *a_perm; | |
1058 | const u8 b_perm = container_of(b, struct tomoyo_path_number_acl, head) | |
1059 | ->perm; | |
1060 | if (is_delete) | |
1061 | perm &= ~b_perm; | |
1062 | else | |
1063 | perm |= b_perm; | |
1064 | *a_perm = perm; | |
1065 | return !perm; | |
1066 | } | |
1067 | ||
a1f9bb6a TH |
1068 | /** |
1069 | * tomoyo_update_path_number_acl - Update ioctl/chmod/chown/chgrp ACL. | |
1070 | * | |
1071 | * @type: Type of operation. | |
1072 | * @filename: Filename. | |
1073 | * @number: Number. | |
1074 | * @domain: Pointer to "struct tomoyo_domain_info". | |
1075 | * @is_delete: True if it is a delete request. | |
1076 | * | |
1077 | * Returns 0 on success, negative value otherwise. | |
1078 | */ | |
237ab459 TH |
1079 | static int tomoyo_update_path_number_acl(const u8 type, const char *filename, |
1080 | char *number, | |
1081 | struct tomoyo_domain_info * const | |
1082 | domain, | |
1083 | const bool is_delete) | |
a1f9bb6a | 1084 | { |
a1f9bb6a TH |
1085 | struct tomoyo_path_number_acl e = { |
1086 | .head.type = TOMOYO_TYPE_PATH_NUMBER_ACL, | |
237ab459 | 1087 | .perm = 1 << type |
a1f9bb6a TH |
1088 | }; |
1089 | int error = is_delete ? -ENOENT : -ENOMEM; | |
a1f9bb6a TH |
1090 | if (!tomoyo_parse_name_union(filename, &e.name)) |
1091 | return -EINVAL; | |
1092 | if (!tomoyo_parse_number_union(number, &e.number)) | |
1093 | goto out; | |
237ab459 TH |
1094 | error = tomoyo_update_domain(&e.head, sizeof(e), is_delete, domain, |
1095 | tomoyo_same_path_number_acl, | |
1096 | tomoyo_merge_path_number_acl); | |
a1f9bb6a TH |
1097 | out: |
1098 | tomoyo_put_name_union(&e.name); | |
1099 | tomoyo_put_number_union(&e.number); | |
1100 | return error; | |
1101 | } | |
1102 | ||
1103 | /** | |
1104 | * tomoyo_path_number_perm2 - Check permission for "create", "mkdir", "mkfifo", "mksock", "ioctl", "chmod", "chown", "chgrp". | |
1105 | * | |
1106 | * @r: Pointer to "strct tomoyo_request_info". | |
1107 | * @filename: Filename to check. | |
1108 | * @number: Number. | |
1109 | * | |
1110 | * Returns 0 on success, negative value otherwise. | |
1111 | * | |
1112 | * Caller holds tomoyo_read_lock(). | |
1113 | */ | |
1114 | static int tomoyo_path_number_perm2(struct tomoyo_request_info *r, | |
1115 | const u8 type, | |
1116 | const struct tomoyo_path_info *filename, | |
1117 | const unsigned long number) | |
1118 | { | |
a1f9bb6a | 1119 | int error; |
a1f9bb6a TH |
1120 | |
1121 | if (!filename) | |
1122 | return 0; | |
cf6e9a64 TH |
1123 | r->param_type = TOMOYO_TYPE_PATH_NUMBER_ACL; |
1124 | r->param.path_number.operation = type; | |
1125 | r->param.path_number.filename = filename; | |
1126 | r->param.path_number.number = number; | |
17fcfbd9 | 1127 | do { |
99a85259 TH |
1128 | tomoyo_check_acl(r, tomoyo_check_path_number_acl); |
1129 | error = tomoyo_audit_path_number_log(r); | |
17fcfbd9 | 1130 | } while (error == TOMOYO_RETRY_REQUEST); |
a1f9bb6a TH |
1131 | return error; |
1132 | } | |
1133 | ||
1134 | /** | |
1135 | * tomoyo_path_number_perm - Check permission for "create", "mkdir", "mkfifo", "mksock", "ioctl", "chmod", "chown", "chgrp". | |
1136 | * | |
1137 | * @type: Type of operation. | |
1138 | * @path: Pointer to "struct path". | |
1139 | * @number: Number. | |
1140 | * | |
1141 | * Returns 0 on success, negative value otherwise. | |
1142 | */ | |
1143 | int tomoyo_path_number_perm(const u8 type, struct path *path, | |
1144 | unsigned long number) | |
1145 | { | |
1146 | struct tomoyo_request_info r; | |
1147 | int error = -ENOMEM; | |
c8c57e84 | 1148 | struct tomoyo_path_info buf; |
a1f9bb6a TH |
1149 | int idx; |
1150 | ||
57c2590f TH |
1151 | if (tomoyo_init_request_info(&r, NULL, tomoyo_pn2mac[type]) |
1152 | == TOMOYO_CONFIG_DISABLED || !path->mnt || !path->dentry) | |
a1f9bb6a TH |
1153 | return 0; |
1154 | idx = tomoyo_read_lock(); | |
c8c57e84 | 1155 | if (!tomoyo_get_realpath(&buf, path)) |
a1f9bb6a | 1156 | goto out; |
c8c57e84 TH |
1157 | if (type == TOMOYO_TYPE_MKDIR) |
1158 | tomoyo_add_slash(&buf); | |
1159 | error = tomoyo_path_number_perm2(&r, type, &buf, number); | |
a1f9bb6a | 1160 | out: |
c8c57e84 | 1161 | kfree(buf.name); |
a1f9bb6a TH |
1162 | tomoyo_read_unlock(idx); |
1163 | if (r.mode != TOMOYO_CONFIG_ENFORCING) | |
1164 | error = 0; | |
1165 | return error; | |
1166 | } | |
1167 | ||
b69a54ee KT |
1168 | /** |
1169 | * tomoyo_check_open_permission - Check permission for "read" and "write". | |
1170 | * | |
1171 | * @domain: Pointer to "struct tomoyo_domain_info". | |
1172 | * @path: Pointer to "struct path". | |
1173 | * @flag: Flags for open(). | |
1174 | * | |
1175 | * Returns 0 on success, negative value otherwise. | |
1176 | */ | |
1177 | int tomoyo_check_open_permission(struct tomoyo_domain_info *domain, | |
1178 | struct path *path, const int flag) | |
1179 | { | |
1180 | const u8 acc_mode = ACC_MODE(flag); | |
1181 | int error = -ENOMEM; | |
c8c57e84 | 1182 | struct tomoyo_path_info buf; |
cb0abe6a | 1183 | struct tomoyo_request_info r; |
fdb8ebb7 | 1184 | int idx; |
b69a54ee | 1185 | |
57c2590f TH |
1186 | if (!path->mnt || |
1187 | (path->dentry->d_inode && S_ISDIR(path->dentry->d_inode->i_mode))) | |
b69a54ee | 1188 | return 0; |
57c2590f TH |
1189 | buf.name = NULL; |
1190 | r.mode = TOMOYO_CONFIG_DISABLED; | |
fdb8ebb7 | 1191 | idx = tomoyo_read_lock(); |
c8c57e84 | 1192 | if (!tomoyo_get_realpath(&buf, path)) |
b69a54ee KT |
1193 | goto out; |
1194 | error = 0; | |
1195 | /* | |
1196 | * If the filename is specified by "deny_rewrite" keyword, | |
1197 | * we need to check "allow_rewrite" permission when the filename is not | |
1198 | * opened for append mode or the filename is truncated at open time. | |
1199 | */ | |
57c2590f TH |
1200 | if ((acc_mode & MAY_WRITE) && !(flag & O_APPEND) |
1201 | && tomoyo_init_request_info(&r, domain, TOMOYO_MAC_FILE_REWRITE) | |
1202 | != TOMOYO_CONFIG_DISABLED) { | |
1203 | if (!tomoyo_get_realpath(&buf, path)) { | |
1204 | error = -ENOMEM; | |
1205 | goto out; | |
1206 | } | |
75093152 | 1207 | if (tomoyo_no_rewrite_file(&buf)) |
57c2590f TH |
1208 | error = tomoyo_path_permission(&r, TOMOYO_TYPE_REWRITE, |
1209 | &buf); | |
b69a54ee | 1210 | } |
57c2590f TH |
1211 | if (!error && acc_mode && |
1212 | tomoyo_init_request_info(&r, domain, TOMOYO_MAC_FILE_OPEN) | |
1213 | != TOMOYO_CONFIG_DISABLED) { | |
05336dee | 1214 | u8 operation; |
57c2590f TH |
1215 | if (!buf.name && !tomoyo_get_realpath(&buf, path)) { |
1216 | error = -ENOMEM; | |
1217 | goto out; | |
1218 | } | |
05336dee TH |
1219 | if (acc_mode == (MAY_READ | MAY_WRITE)) |
1220 | operation = TOMOYO_TYPE_READ_WRITE; | |
1221 | else if (acc_mode == MAY_READ) | |
1222 | operation = TOMOYO_TYPE_READ; | |
1223 | else | |
1224 | operation = TOMOYO_TYPE_WRITE; | |
1225 | error = tomoyo_path_permission(&r, operation, &buf); | |
57c2590f | 1226 | } |
b69a54ee | 1227 | out: |
c8c57e84 | 1228 | kfree(buf.name); |
fdb8ebb7 | 1229 | tomoyo_read_unlock(idx); |
cb0abe6a | 1230 | if (r.mode != TOMOYO_CONFIG_ENFORCING) |
b69a54ee KT |
1231 | error = 0; |
1232 | return error; | |
1233 | } | |
1234 | ||
1235 | /** | |
2106ccd9 | 1236 | * tomoyo_path_perm - Check permission for "unlink", "rmdir", "truncate", "symlink", "rewrite", "chroot" and "unmount". |
b69a54ee | 1237 | * |
b69a54ee KT |
1238 | * @operation: Type of operation. |
1239 | * @path: Pointer to "struct path". | |
1240 | * | |
1241 | * Returns 0 on success, negative value otherwise. | |
1242 | */ | |
97d6931e | 1243 | int tomoyo_path_perm(const u8 operation, struct path *path) |
b69a54ee KT |
1244 | { |
1245 | int error = -ENOMEM; | |
c8c57e84 | 1246 | struct tomoyo_path_info buf; |
cb0abe6a | 1247 | struct tomoyo_request_info r; |
fdb8ebb7 | 1248 | int idx; |
b69a54ee | 1249 | |
57c2590f TH |
1250 | if (!path->mnt) |
1251 | return 0; | |
1252 | if (tomoyo_init_request_info(&r, NULL, tomoyo_p2mac[operation]) | |
1253 | == TOMOYO_CONFIG_DISABLED) | |
b69a54ee | 1254 | return 0; |
57c2590f | 1255 | buf.name = NULL; |
fdb8ebb7 | 1256 | idx = tomoyo_read_lock(); |
c8c57e84 | 1257 | if (!tomoyo_get_realpath(&buf, path)) |
b69a54ee KT |
1258 | goto out; |
1259 | switch (operation) { | |
cb0abe6a | 1260 | case TOMOYO_TYPE_REWRITE: |
75093152 | 1261 | if (!tomoyo_no_rewrite_file(&buf)) { |
cb0abe6a TH |
1262 | error = 0; |
1263 | goto out; | |
1264 | } | |
1265 | break; | |
7ef61233 TH |
1266 | case TOMOYO_TYPE_RMDIR: |
1267 | case TOMOYO_TYPE_CHROOT: | |
57c2590f | 1268 | case TOMOYO_TYPE_UMOUNT: |
c8c57e84 TH |
1269 | tomoyo_add_slash(&buf); |
1270 | break; | |
b69a54ee | 1271 | } |
c8c57e84 | 1272 | error = tomoyo_path_permission(&r, operation, &buf); |
b69a54ee | 1273 | out: |
c8c57e84 | 1274 | kfree(buf.name); |
fdb8ebb7 | 1275 | tomoyo_read_unlock(idx); |
cb0abe6a | 1276 | if (r.mode != TOMOYO_CONFIG_ENFORCING) |
b69a54ee KT |
1277 | error = 0; |
1278 | return error; | |
1279 | } | |
1280 | ||
a1f9bb6a | 1281 | /** |
75093152 | 1282 | * tomoyo_mkdev_perm - Check permission for "mkblock" and "mkchar". |
a1f9bb6a TH |
1283 | * |
1284 | * @operation: Type of operation. (TOMOYO_TYPE_MKCHAR or TOMOYO_TYPE_MKBLOCK) | |
1285 | * @path: Pointer to "struct path". | |
1286 | * @mode: Create mode. | |
1287 | * @dev: Device number. | |
1288 | * | |
1289 | * Returns 0 on success, negative value otherwise. | |
1290 | */ | |
75093152 | 1291 | int tomoyo_mkdev_perm(const u8 operation, struct path *path, |
a1f9bb6a TH |
1292 | const unsigned int mode, unsigned int dev) |
1293 | { | |
1294 | struct tomoyo_request_info r; | |
1295 | int error = -ENOMEM; | |
c8c57e84 | 1296 | struct tomoyo_path_info buf; |
a1f9bb6a TH |
1297 | int idx; |
1298 | ||
57c2590f TH |
1299 | if (!path->mnt || |
1300 | tomoyo_init_request_info(&r, NULL, tomoyo_pnnn2mac[operation]) | |
1301 | == TOMOYO_CONFIG_DISABLED) | |
a1f9bb6a TH |
1302 | return 0; |
1303 | idx = tomoyo_read_lock(); | |
1304 | error = -ENOMEM; | |
c8c57e84 | 1305 | if (tomoyo_get_realpath(&buf, path)) { |
cf6e9a64 | 1306 | dev = new_decode_dev(dev); |
75093152 | 1307 | r.param_type = TOMOYO_TYPE_MKDEV_ACL; |
cf6e9a64 TH |
1308 | r.param.mkdev.filename = &buf; |
1309 | r.param.mkdev.operation = operation; | |
1310 | r.param.mkdev.mode = mode; | |
1311 | r.param.mkdev.major = MAJOR(dev); | |
1312 | r.param.mkdev.minor = MINOR(dev); | |
99a85259 TH |
1313 | tomoyo_check_acl(&r, tomoyo_check_mkdev_acl); |
1314 | error = tomoyo_audit_mkdev_log(&r); | |
c8c57e84 | 1315 | kfree(buf.name); |
a1f9bb6a TH |
1316 | } |
1317 | tomoyo_read_unlock(idx); | |
1318 | if (r.mode != TOMOYO_CONFIG_ENFORCING) | |
1319 | error = 0; | |
1320 | return error; | |
1321 | } | |
1322 | ||
b69a54ee | 1323 | /** |
7ef61233 | 1324 | * tomoyo_path2_perm - Check permission for "rename", "link" and "pivot_root". |
b69a54ee | 1325 | * |
b69a54ee KT |
1326 | * @operation: Type of operation. |
1327 | * @path1: Pointer to "struct path". | |
1328 | * @path2: Pointer to "struct path". | |
1329 | * | |
1330 | * Returns 0 on success, negative value otherwise. | |
1331 | */ | |
97d6931e | 1332 | int tomoyo_path2_perm(const u8 operation, struct path *path1, |
7ef61233 | 1333 | struct path *path2) |
b69a54ee KT |
1334 | { |
1335 | int error = -ENOMEM; | |
c8c57e84 TH |
1336 | struct tomoyo_path_info buf1; |
1337 | struct tomoyo_path_info buf2; | |
cb0abe6a | 1338 | struct tomoyo_request_info r; |
fdb8ebb7 | 1339 | int idx; |
b69a54ee | 1340 | |
57c2590f TH |
1341 | if (!path1->mnt || !path2->mnt || |
1342 | tomoyo_init_request_info(&r, NULL, tomoyo_pp2mac[operation]) | |
1343 | == TOMOYO_CONFIG_DISABLED) | |
b69a54ee | 1344 | return 0; |
c8c57e84 TH |
1345 | buf1.name = NULL; |
1346 | buf2.name = NULL; | |
fdb8ebb7 | 1347 | idx = tomoyo_read_lock(); |
c8c57e84 TH |
1348 | if (!tomoyo_get_realpath(&buf1, path1) || |
1349 | !tomoyo_get_realpath(&buf2, path2)) | |
b69a54ee | 1350 | goto out; |
57c2590f TH |
1351 | switch (operation) { |
1352 | struct dentry *dentry; | |
1353 | case TOMOYO_TYPE_RENAME: | |
1354 | case TOMOYO_TYPE_LINK: | |
1355 | dentry = path1->dentry; | |
1356 | if (!dentry->d_inode || !S_ISDIR(dentry->d_inode->i_mode)) | |
1357 | break; | |
1358 | /* fall through */ | |
1359 | case TOMOYO_TYPE_PIVOT_ROOT: | |
1360 | tomoyo_add_slash(&buf1); | |
1361 | tomoyo_add_slash(&buf2); | |
1362 | break; | |
1363 | } | |
cf6e9a64 TH |
1364 | r.param_type = TOMOYO_TYPE_PATH2_ACL; |
1365 | r.param.path2.operation = operation; | |
1366 | r.param.path2.filename1 = &buf1; | |
1367 | r.param.path2.filename2 = &buf2; | |
17fcfbd9 | 1368 | do { |
99a85259 TH |
1369 | tomoyo_check_acl(&r, tomoyo_check_path2_acl); |
1370 | error = tomoyo_audit_path2_log(&r); | |
1371 | } while (error == TOMOYO_RETRY_REQUEST); | |
b69a54ee | 1372 | out: |
c8c57e84 TH |
1373 | kfree(buf1.name); |
1374 | kfree(buf2.name); | |
fdb8ebb7 | 1375 | tomoyo_read_unlock(idx); |
cb0abe6a | 1376 | if (r.mode != TOMOYO_CONFIG_ENFORCING) |
b69a54ee KT |
1377 | error = 0; |
1378 | return error; | |
1379 | } | |
a1f9bb6a TH |
1380 | |
1381 | /** | |
1382 | * tomoyo_write_file_policy - Update file related list. | |
1383 | * | |
1384 | * @data: String to parse. | |
1385 | * @domain: Pointer to "struct tomoyo_domain_info". | |
1386 | * @is_delete: True if it is a delete request. | |
1387 | * | |
1388 | * Returns 0 on success, negative value otherwise. | |
1389 | * | |
1390 | * Caller holds tomoyo_read_lock(). | |
1391 | */ | |
1392 | int tomoyo_write_file_policy(char *data, struct tomoyo_domain_info *domain, | |
1393 | const bool is_delete) | |
1394 | { | |
1395 | char *w[5]; | |
1396 | u8 type; | |
1397 | if (!tomoyo_tokenize(data, w, sizeof(w)) || !w[1][0]) | |
1398 | return -EINVAL; | |
237ab459 | 1399 | if (strncmp(w[0], "allow_", 6)) |
a1f9bb6a | 1400 | goto out; |
a1f9bb6a TH |
1401 | w[0] += 6; |
1402 | for (type = 0; type < TOMOYO_MAX_PATH_OPERATION; type++) { | |
1403 | if (strcmp(w[0], tomoyo_path_keyword[type])) | |
1404 | continue; | |
1405 | return tomoyo_update_path_acl(type, w[1], domain, is_delete); | |
1406 | } | |
1407 | if (!w[2][0]) | |
1408 | goto out; | |
1409 | for (type = 0; type < TOMOYO_MAX_PATH2_OPERATION; type++) { | |
1410 | if (strcmp(w[0], tomoyo_path2_keyword[type])) | |
1411 | continue; | |
1412 | return tomoyo_update_path2_acl(type, w[1], w[2], domain, | |
1413 | is_delete); | |
1414 | } | |
1415 | for (type = 0; type < TOMOYO_MAX_PATH_NUMBER_OPERATION; type++) { | |
1416 | if (strcmp(w[0], tomoyo_path_number_keyword[type])) | |
1417 | continue; | |
1418 | return tomoyo_update_path_number_acl(type, w[1], w[2], domain, | |
1419 | is_delete); | |
1420 | } | |
1421 | if (!w[3][0] || !w[4][0]) | |
1422 | goto out; | |
75093152 TH |
1423 | for (type = 0; type < TOMOYO_MAX_MKDEV_OPERATION; type++) { |
1424 | if (strcmp(w[0], tomoyo_mkdev_keyword[type])) | |
a1f9bb6a | 1425 | continue; |
75093152 TH |
1426 | return tomoyo_update_mkdev_acl(type, w[1], w[2], w[3], |
1427 | w[4], domain, is_delete); | |
a1f9bb6a TH |
1428 | } |
1429 | out: | |
1430 | return -EINVAL; | |
1431 | } |