Commit | Line | Data |
---|---|---|
26a2a1c9 KT |
1 | /* |
2 | * security/tomoyo/domain.c | |
3 | * | |
c3ef1500 | 4 | * Domain transition functions for TOMOYO. |
26a2a1c9 | 5 | * |
c3ef1500 | 6 | * Copyright (C) 2005-2010 NTT DATA CORPORATION |
26a2a1c9 KT |
7 | */ |
8 | ||
9 | #include "common.h" | |
26a2a1c9 | 10 | #include <linux/binfmts.h> |
5a0e3ad6 | 11 | #include <linux/slab.h> |
26a2a1c9 KT |
12 | |
13 | /* Variables definitions.*/ | |
14 | ||
15 | /* The initial domain. */ | |
16 | struct tomoyo_domain_info tomoyo_kernel_domain; | |
17 | ||
36f5e1ff TH |
18 | /** |
19 | * tomoyo_update_policy - Update an entry for exception policy. | |
20 | * | |
21 | * @new_entry: Pointer to "struct tomoyo_acl_info". | |
22 | * @size: Size of @new_entry in bytes. | |
23 | * @is_delete: True if it is a delete request. | |
24 | * @list: Pointer to "struct list_head". | |
25 | * @check_duplicate: Callback function to find duplicated entry. | |
26 | * | |
27 | * Returns 0 on success, negative value otherwise. | |
28 | * | |
29 | * Caller holds tomoyo_read_lock(). | |
30 | */ | |
31 | int tomoyo_update_policy(struct tomoyo_acl_head *new_entry, const int size, | |
32 | bool is_delete, struct list_head *list, | |
33 | bool (*check_duplicate) (const struct tomoyo_acl_head | |
34 | *, | |
35 | const struct tomoyo_acl_head | |
36 | *)) | |
37 | { | |
38 | int error = is_delete ? -ENOENT : -ENOMEM; | |
39 | struct tomoyo_acl_head *entry; | |
40 | ||
41 | if (mutex_lock_interruptible(&tomoyo_policy_lock)) | |
42 | return -ENOMEM; | |
43 | list_for_each_entry_rcu(entry, list, list) { | |
44 | if (!check_duplicate(entry, new_entry)) | |
45 | continue; | |
46 | entry->is_deleted = is_delete; | |
47 | error = 0; | |
48 | break; | |
49 | } | |
50 | if (error && !is_delete) { | |
51 | entry = tomoyo_commit_ok(new_entry, size); | |
52 | if (entry) { | |
53 | list_add_tail_rcu(&entry->list, list); | |
54 | error = 0; | |
55 | } | |
56 | } | |
57 | mutex_unlock(&tomoyo_policy_lock); | |
58 | return error; | |
59 | } | |
60 | ||
237ab459 TH |
61 | /** |
62 | * tomoyo_update_domain - Update an entry for domain policy. | |
63 | * | |
64 | * @new_entry: Pointer to "struct tomoyo_acl_info". | |
65 | * @size: Size of @new_entry in bytes. | |
66 | * @is_delete: True if it is a delete request. | |
67 | * @domain: Pointer to "struct tomoyo_domain_info". | |
68 | * @check_duplicate: Callback function to find duplicated entry. | |
69 | * @merge_duplicate: Callback function to merge duplicated entry. | |
70 | * | |
71 | * Returns 0 on success, negative value otherwise. | |
72 | * | |
73 | * Caller holds tomoyo_read_lock(). | |
74 | */ | |
75 | int tomoyo_update_domain(struct tomoyo_acl_info *new_entry, const int size, | |
76 | bool is_delete, struct tomoyo_domain_info *domain, | |
77 | bool (*check_duplicate) (const struct tomoyo_acl_info | |
78 | *, | |
79 | const struct tomoyo_acl_info | |
80 | *), | |
81 | bool (*merge_duplicate) (struct tomoyo_acl_info *, | |
82 | struct tomoyo_acl_info *, | |
83 | const bool)) | |
84 | { | |
85 | int error = is_delete ? -ENOENT : -ENOMEM; | |
86 | struct tomoyo_acl_info *entry; | |
87 | ||
88 | if (mutex_lock_interruptible(&tomoyo_policy_lock)) | |
89 | return error; | |
90 | list_for_each_entry_rcu(entry, &domain->acl_info_list, list) { | |
91 | if (!check_duplicate(entry, new_entry)) | |
92 | continue; | |
93 | if (merge_duplicate) | |
94 | entry->is_deleted = merge_duplicate(entry, new_entry, | |
95 | is_delete); | |
96 | else | |
97 | entry->is_deleted = is_delete; | |
98 | error = 0; | |
99 | break; | |
100 | } | |
101 | if (error && !is_delete) { | |
102 | entry = tomoyo_commit_ok(new_entry, size); | |
103 | if (entry) { | |
104 | list_add_tail_rcu(&entry->list, &domain->acl_info_list); | |
105 | error = 0; | |
106 | } | |
107 | } | |
108 | mutex_unlock(&tomoyo_policy_lock); | |
109 | return error; | |
110 | } | |
111 | ||
99a85259 | 112 | void tomoyo_check_acl(struct tomoyo_request_info *r, |
484ca79c | 113 | bool (*check_entry) (struct tomoyo_request_info *, |
99a85259 TH |
114 | const struct tomoyo_acl_info *)) |
115 | { | |
116 | const struct tomoyo_domain_info *domain = r->domain; | |
117 | struct tomoyo_acl_info *ptr; | |
118 | ||
119 | list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) { | |
120 | if (ptr->is_deleted || ptr->type != r->param_type) | |
121 | continue; | |
122 | if (check_entry(r, ptr)) { | |
123 | r->granted = true; | |
124 | return; | |
125 | } | |
126 | } | |
127 | r->granted = false; | |
128 | } | |
129 | ||
a230f9e7 | 130 | /* The list for "struct tomoyo_domain_info". */ |
26a2a1c9 | 131 | LIST_HEAD(tomoyo_domain_list); |
26a2a1c9 | 132 | |
a230f9e7 TH |
133 | struct list_head tomoyo_policy_list[TOMOYO_MAX_POLICY]; |
134 | struct list_head tomoyo_group_list[TOMOYO_MAX_GROUP]; | |
135 | ||
26a2a1c9 | 136 | /** |
e2bf6907 | 137 | * tomoyo_last_word - Get last component of a domainname. |
26a2a1c9 | 138 | * |
e2bf6907 | 139 | * @domainname: Domainname to check. |
26a2a1c9 | 140 | * |
e2bf6907 | 141 | * Returns the last word of @domainname. |
26a2a1c9 | 142 | */ |
e2bf6907 | 143 | static const char *tomoyo_last_word(const char *name) |
26a2a1c9 | 144 | { |
e2bf6907 TH |
145 | const char *cp = strrchr(name, ' '); |
146 | if (cp) | |
147 | return cp + 1; | |
148 | return name; | |
26a2a1c9 KT |
149 | } |
150 | ||
e2bf6907 TH |
151 | static bool tomoyo_same_transition_control(const struct tomoyo_acl_head *a, |
152 | const struct tomoyo_acl_head *b) | |
36f5e1ff | 153 | { |
5448ec4f TH |
154 | const struct tomoyo_transition_control *p1 = container_of(a, |
155 | typeof(*p1), | |
156 | head); | |
157 | const struct tomoyo_transition_control *p2 = container_of(b, | |
158 | typeof(*p2), | |
159 | head); | |
160 | return p1->type == p2->type && p1->is_last_name == p2->is_last_name | |
36f5e1ff TH |
161 | && p1->domainname == p2->domainname |
162 | && p1->program == p2->program; | |
163 | } | |
164 | ||
26a2a1c9 | 165 | /** |
5448ec4f | 166 | * tomoyo_update_transition_control_entry - Update "struct tomoyo_transition_control" list. |
26a2a1c9 | 167 | * |
5448ec4f TH |
168 | * @domainname: The name of domain. Maybe NULL. |
169 | * @program: The name of program. Maybe NULL. | |
170 | * @type: Type of transition. | |
26a2a1c9 KT |
171 | * @is_delete: True if it is a delete request. |
172 | * | |
173 | * Returns 0 on success, negative value otherwise. | |
174 | */ | |
5448ec4f | 175 | static int tomoyo_update_transition_control_entry(const char *domainname, |
26a2a1c9 | 176 | const char *program, |
5448ec4f | 177 | const u8 type, |
26a2a1c9 KT |
178 | const bool is_delete) |
179 | { | |
5448ec4f | 180 | struct tomoyo_transition_control e = { .type = type }; |
ca0b7df3 | 181 | int error = is_delete ? -ENOENT : -ENOMEM; |
5448ec4f TH |
182 | if (program) { |
183 | if (!tomoyo_correct_path(program)) | |
184 | return -EINVAL; | |
185 | e.program = tomoyo_get_name(program); | |
186 | if (!e.program) | |
187 | goto out; | |
188 | } | |
26a2a1c9 | 189 | if (domainname) { |
5448ec4f TH |
190 | if (!tomoyo_correct_domain(domainname)) { |
191 | if (!tomoyo_correct_path(domainname)) | |
192 | goto out; | |
9e4b50e9 | 193 | e.is_last_name = true; |
5448ec4f | 194 | } |
9e4b50e9 TH |
195 | e.domainname = tomoyo_get_name(domainname); |
196 | if (!e.domainname) | |
ca0b7df3 | 197 | goto out; |
26a2a1c9 | 198 | } |
36f5e1ff | 199 | error = tomoyo_update_policy(&e.head, sizeof(e), is_delete, |
a230f9e7 | 200 | &tomoyo_policy_list |
5448ec4f | 201 | [TOMOYO_ID_TRANSITION_CONTROL], |
e2bf6907 | 202 | tomoyo_same_transition_control); |
ca0b7df3 | 203 | out: |
9e4b50e9 TH |
204 | tomoyo_put_name(e.domainname); |
205 | tomoyo_put_name(e.program); | |
26a2a1c9 KT |
206 | return error; |
207 | } | |
208 | ||
26a2a1c9 | 209 | /** |
5448ec4f | 210 | * tomoyo_write_transition_control - Write "struct tomoyo_transition_control" list. |
26a2a1c9 KT |
211 | * |
212 | * @data: String to parse. | |
26a2a1c9 | 213 | * @is_delete: True if it is a delete request. |
5448ec4f | 214 | * @type: Type of this entry. |
26a2a1c9 KT |
215 | * |
216 | * Returns 0 on success, negative value otherwise. | |
217 | */ | |
5448ec4f TH |
218 | int tomoyo_write_transition_control(char *data, const bool is_delete, |
219 | const u8 type) | |
26a2a1c9 | 220 | { |
5448ec4f TH |
221 | char *domainname = strstr(data, " from "); |
222 | if (domainname) { | |
223 | *domainname = '\0'; | |
224 | domainname += 6; | |
225 | } else if (type == TOMOYO_TRANSITION_CONTROL_NO_KEEP || | |
226 | type == TOMOYO_TRANSITION_CONTROL_KEEP) { | |
227 | domainname = data; | |
228 | data = NULL; | |
26a2a1c9 | 229 | } |
5448ec4f | 230 | return tomoyo_update_transition_control_entry(domainname, data, type, |
26a2a1c9 KT |
231 | is_delete); |
232 | } | |
233 | ||
234 | /** | |
5448ec4f | 235 | * tomoyo_transition_type - Get domain transition type. |
26a2a1c9 KT |
236 | * |
237 | * @domainname: The name of domain. | |
238 | * @program: The name of program. | |
26a2a1c9 | 239 | * |
5448ec4f TH |
240 | * Returns TOMOYO_TRANSITION_CONTROL_INITIALIZE if executing @program |
241 | * reinitializes domain transition, TOMOYO_TRANSITION_CONTROL_KEEP if executing | |
242 | * @program suppresses domain transition, others otherwise. | |
fdb8ebb7 TH |
243 | * |
244 | * Caller holds tomoyo_read_lock(). | |
26a2a1c9 | 245 | */ |
5448ec4f TH |
246 | static u8 tomoyo_transition_type(const struct tomoyo_path_info *domainname, |
247 | const struct tomoyo_path_info *program) | |
26a2a1c9 | 248 | { |
5448ec4f TH |
249 | const struct tomoyo_transition_control *ptr; |
250 | const char *last_name = tomoyo_last_word(domainname->name); | |
251 | u8 type; | |
252 | for (type = 0; type < TOMOYO_MAX_TRANSITION_TYPE; type++) { | |
253 | next: | |
254 | list_for_each_entry_rcu(ptr, &tomoyo_policy_list | |
255 | [TOMOYO_ID_TRANSITION_CONTROL], | |
256 | head.list) { | |
257 | if (ptr->head.is_deleted || ptr->type != type) | |
26a2a1c9 | 258 | continue; |
5448ec4f TH |
259 | if (ptr->domainname) { |
260 | if (!ptr->is_last_name) { | |
261 | if (ptr->domainname != domainname) | |
262 | continue; | |
263 | } else { | |
264 | /* | |
265 | * Use direct strcmp() since this is | |
266 | * unlikely used. | |
267 | */ | |
268 | if (strcmp(ptr->domainname->name, | |
269 | last_name)) | |
270 | continue; | |
271 | } | |
272 | } | |
273 | if (ptr->program && | |
274 | tomoyo_pathcmp(ptr->program, program)) | |
26a2a1c9 | 275 | continue; |
5448ec4f TH |
276 | if (type == TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE) { |
277 | /* | |
278 | * Do not check for initialize_domain if | |
279 | * no_initialize_domain matched. | |
280 | */ | |
281 | type = TOMOYO_TRANSITION_CONTROL_NO_KEEP; | |
282 | goto next; | |
283 | } | |
284 | goto done; | |
26a2a1c9 | 285 | } |
26a2a1c9 | 286 | } |
5448ec4f TH |
287 | done: |
288 | return type; | |
26a2a1c9 KT |
289 | } |
290 | ||
e2bf6907 TH |
291 | static bool tomoyo_same_aggregator(const struct tomoyo_acl_head *a, |
292 | const struct tomoyo_acl_head *b) | |
36f5e1ff | 293 | { |
e2bf6907 TH |
294 | const struct tomoyo_aggregator *p1 = container_of(a, typeof(*p1), head); |
295 | const struct tomoyo_aggregator *p2 = container_of(b, typeof(*p2), head); | |
36f5e1ff TH |
296 | return p1->original_name == p2->original_name && |
297 | p1->aggregated_name == p2->aggregated_name; | |
298 | } | |
299 | ||
1084307c | 300 | /** |
e2bf6907 | 301 | * tomoyo_update_aggregator_entry - Update "struct tomoyo_aggregator" list. |
1084307c TH |
302 | * |
303 | * @original_name: The original program's name. | |
304 | * @aggregated_name: The program name to use. | |
305 | * @is_delete: True if it is a delete request. | |
306 | * | |
307 | * Returns 0 on success, negative value otherwise. | |
308 | * | |
309 | * Caller holds tomoyo_read_lock(). | |
310 | */ | |
311 | static int tomoyo_update_aggregator_entry(const char *original_name, | |
312 | const char *aggregated_name, | |
313 | const bool is_delete) | |
314 | { | |
e2bf6907 | 315 | struct tomoyo_aggregator e = { }; |
1084307c TH |
316 | int error = is_delete ? -ENOENT : -ENOMEM; |
317 | ||
75093152 TH |
318 | if (!tomoyo_correct_path(original_name) || |
319 | !tomoyo_correct_path(aggregated_name)) | |
1084307c TH |
320 | return -EINVAL; |
321 | e.original_name = tomoyo_get_name(original_name); | |
322 | e.aggregated_name = tomoyo_get_name(aggregated_name); | |
323 | if (!e.original_name || !e.aggregated_name || | |
324 | e.aggregated_name->is_patterned) /* No patterns allowed. */ | |
325 | goto out; | |
36f5e1ff | 326 | error = tomoyo_update_policy(&e.head, sizeof(e), is_delete, |
a230f9e7 | 327 | &tomoyo_policy_list[TOMOYO_ID_AGGREGATOR], |
e2bf6907 | 328 | tomoyo_same_aggregator); |
1084307c TH |
329 | out: |
330 | tomoyo_put_name(e.original_name); | |
331 | tomoyo_put_name(e.aggregated_name); | |
332 | return error; | |
333 | } | |
334 | ||
1084307c | 335 | /** |
e2bf6907 | 336 | * tomoyo_write_aggregator - Write "struct tomoyo_aggregator" list. |
1084307c TH |
337 | * |
338 | * @data: String to parse. | |
339 | * @is_delete: True if it is a delete request. | |
340 | * | |
341 | * Returns 0 on success, negative value otherwise. | |
342 | * | |
343 | * Caller holds tomoyo_read_lock(). | |
344 | */ | |
e2bf6907 | 345 | int tomoyo_write_aggregator(char *data, const bool is_delete) |
1084307c TH |
346 | { |
347 | char *cp = strchr(data, ' '); | |
348 | ||
349 | if (!cp) | |
350 | return -EINVAL; | |
351 | *cp++ = '\0'; | |
352 | return tomoyo_update_aggregator_entry(data, cp, is_delete); | |
353 | } | |
354 | ||
26a2a1c9 | 355 | /** |
e2bf6907 | 356 | * tomoyo_assign_domain - Create a domain. |
26a2a1c9 KT |
357 | * |
358 | * @domainname: The name of domain. | |
359 | * @profile: Profile number to assign if the domain was newly created. | |
360 | * | |
361 | * Returns pointer to "struct tomoyo_domain_info" on success, NULL otherwise. | |
fdb8ebb7 TH |
362 | * |
363 | * Caller holds tomoyo_read_lock(). | |
26a2a1c9 | 364 | */ |
e2bf6907 TH |
365 | struct tomoyo_domain_info *tomoyo_assign_domain(const char *domainname, |
366 | const u8 profile) | |
26a2a1c9 | 367 | { |
ca0b7df3 | 368 | struct tomoyo_domain_info *entry; |
29282381 | 369 | struct tomoyo_domain_info *domain = NULL; |
26a2a1c9 | 370 | const struct tomoyo_path_info *saved_domainname; |
ca0b7df3 | 371 | bool found = false; |
26a2a1c9 | 372 | |
75093152 | 373 | if (!tomoyo_correct_domain(domainname)) |
ca0b7df3 | 374 | return NULL; |
bf24fb01 | 375 | saved_domainname = tomoyo_get_name(domainname); |
26a2a1c9 | 376 | if (!saved_domainname) |
ca0b7df3 | 377 | return NULL; |
4e5d6f7e | 378 | entry = kzalloc(sizeof(*entry), GFP_NOFS); |
29282381 TH |
379 | if (mutex_lock_interruptible(&tomoyo_policy_lock)) |
380 | goto out; | |
ca0b7df3 TH |
381 | list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) { |
382 | if (domain->is_deleted || | |
383 | tomoyo_pathcmp(saved_domainname, domain->domainname)) | |
384 | continue; | |
385 | found = true; | |
386 | break; | |
387 | } | |
388 | if (!found && tomoyo_memory_ok(entry)) { | |
389 | INIT_LIST_HEAD(&entry->acl_info_list); | |
390 | entry->domainname = saved_domainname; | |
bf24fb01 | 391 | saved_domainname = NULL; |
ca0b7df3 TH |
392 | entry->profile = profile; |
393 | list_add_tail_rcu(&entry->list, &tomoyo_domain_list); | |
394 | domain = entry; | |
395 | entry = NULL; | |
396 | found = true; | |
26a2a1c9 | 397 | } |
f737d95d | 398 | mutex_unlock(&tomoyo_policy_lock); |
29282381 | 399 | out: |
bf24fb01 | 400 | tomoyo_put_name(saved_domainname); |
ca0b7df3 TH |
401 | kfree(entry); |
402 | return found ? domain : NULL; | |
26a2a1c9 KT |
403 | } |
404 | ||
405 | /** | |
406 | * tomoyo_find_next_domain - Find a domain. | |
407 | * | |
56f8c9bc | 408 | * @bprm: Pointer to "struct linux_binprm". |
26a2a1c9 KT |
409 | * |
410 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
411 | * |
412 | * Caller holds tomoyo_read_lock(). | |
26a2a1c9 | 413 | */ |
56f8c9bc | 414 | int tomoyo_find_next_domain(struct linux_binprm *bprm) |
26a2a1c9 | 415 | { |
17fcfbd9 | 416 | struct tomoyo_request_info r; |
c8c57e84 | 417 | char *tmp = kzalloc(TOMOYO_EXEC_TMPSIZE, GFP_NOFS); |
26a2a1c9 KT |
418 | struct tomoyo_domain_info *old_domain = tomoyo_domain(); |
419 | struct tomoyo_domain_info *domain = NULL; | |
26a2a1c9 | 420 | const char *original_name = bprm->filename; |
57c2590f TH |
421 | u8 mode; |
422 | bool is_enforce; | |
26a2a1c9 | 423 | int retval = -ENOMEM; |
c8c57e84 TH |
424 | bool need_kfree = false; |
425 | struct tomoyo_path_info rn = { }; /* real name */ | |
26a2a1c9 | 426 | |
57c2590f TH |
427 | mode = tomoyo_init_request_info(&r, NULL, TOMOYO_MAC_FILE_EXECUTE); |
428 | is_enforce = (mode == TOMOYO_CONFIG_ENFORCING); | |
26a2a1c9 KT |
429 | if (!tmp) |
430 | goto out; | |
431 | ||
17fcfbd9 | 432 | retry: |
c8c57e84 TH |
433 | if (need_kfree) { |
434 | kfree(rn.name); | |
435 | need_kfree = false; | |
436 | } | |
0617c7ff | 437 | /* Get symlink's pathname of program. */ |
26a2a1c9 | 438 | retval = -ENOENT; |
0617c7ff | 439 | rn.name = tomoyo_realpath_nofollow(original_name); |
c8c57e84 | 440 | if (!rn.name) |
26a2a1c9 | 441 | goto out; |
c8c57e84 TH |
442 | tomoyo_fill_path_info(&rn); |
443 | need_kfree = true; | |
444 | ||
1084307c TH |
445 | /* Check 'aggregator' directive. */ |
446 | { | |
e2bf6907 | 447 | struct tomoyo_aggregator *ptr; |
a230f9e7 TH |
448 | list_for_each_entry_rcu(ptr, &tomoyo_policy_list |
449 | [TOMOYO_ID_AGGREGATOR], head.list) { | |
82e0f001 | 450 | if (ptr->head.is_deleted || |
1084307c TH |
451 | !tomoyo_path_matches_pattern(&rn, |
452 | ptr->original_name)) | |
453 | continue; | |
0617c7ff | 454 | kfree(rn.name); |
1084307c TH |
455 | need_kfree = false; |
456 | /* This is OK because it is read only. */ | |
457 | rn = *ptr->aggregated_name; | |
458 | break; | |
459 | } | |
460 | } | |
461 | ||
26a2a1c9 | 462 | /* Check execute permission. */ |
05336dee | 463 | retval = tomoyo_path_permission(&r, TOMOYO_TYPE_EXECUTE, &rn); |
17fcfbd9 TH |
464 | if (retval == TOMOYO_RETRY_REQUEST) |
465 | goto retry; | |
26a2a1c9 KT |
466 | if (retval < 0) |
467 | goto out; | |
484ca79c TH |
468 | /* |
469 | * To be able to specify domainnames with wildcards, use the | |
470 | * pathname specified in the policy (which may contain | |
471 | * wildcard) rather than the pathname passed to execve() | |
472 | * (which never contains wildcard). | |
473 | */ | |
474 | if (r.param.path.matched_path) { | |
475 | if (need_kfree) | |
476 | kfree(rn.name); | |
477 | need_kfree = false; | |
478 | /* This is OK because it is read only. */ | |
479 | rn = *r.param.path.matched_path; | |
480 | } | |
26a2a1c9 | 481 | |
5448ec4f TH |
482 | /* Calculate domain to transit to. */ |
483 | switch (tomoyo_transition_type(old_domain->domainname, &rn)) { | |
484 | case TOMOYO_TRANSITION_CONTROL_INITIALIZE: | |
26a2a1c9 | 485 | /* Transit to the child of tomoyo_kernel_domain domain. */ |
5448ec4f TH |
486 | snprintf(tmp, TOMOYO_EXEC_TMPSIZE - 1, TOMOYO_ROOT_NAME " " |
487 | "%s", rn.name); | |
488 | break; | |
489 | case TOMOYO_TRANSITION_CONTROL_KEEP: | |
26a2a1c9 KT |
490 | /* Keep current domain. */ |
491 | domain = old_domain; | |
5448ec4f TH |
492 | break; |
493 | default: | |
494 | if (old_domain == &tomoyo_kernel_domain && | |
495 | !tomoyo_policy_loaded) { | |
496 | /* | |
497 | * Needn't to transit from kernel domain before | |
498 | * starting /sbin/init. But transit from kernel domain | |
499 | * if executing initializers because they might start | |
500 | * before /sbin/init. | |
501 | */ | |
502 | domain = old_domain; | |
503 | } else { | |
504 | /* Normal domain transition. */ | |
505 | snprintf(tmp, TOMOYO_EXEC_TMPSIZE - 1, "%s %s", | |
506 | old_domain->domainname->name, rn.name); | |
507 | } | |
508 | break; | |
26a2a1c9 | 509 | } |
c8c57e84 | 510 | if (domain || strlen(tmp) >= TOMOYO_EXEC_TMPSIZE - 10) |
26a2a1c9 | 511 | goto done; |
c8c57e84 | 512 | domain = tomoyo_find_domain(tmp); |
26a2a1c9 KT |
513 | if (domain) |
514 | goto done; | |
17fcfbd9 TH |
515 | if (is_enforce) { |
516 | int error = tomoyo_supervisor(&r, "# wants to create domain\n" | |
c8c57e84 | 517 | "%s\n", tmp); |
17fcfbd9 TH |
518 | if (error == TOMOYO_RETRY_REQUEST) |
519 | goto retry; | |
520 | if (error < 0) | |
521 | goto done; | |
522 | } | |
e2bf6907 | 523 | domain = tomoyo_assign_domain(tmp, old_domain->profile); |
26a2a1c9 KT |
524 | done: |
525 | if (domain) | |
526 | goto out; | |
c8c57e84 | 527 | printk(KERN_WARNING "TOMOYO-ERROR: Domain '%s' not defined.\n", tmp); |
26a2a1c9 KT |
528 | if (is_enforce) |
529 | retval = -EPERM; | |
530 | else | |
ea13ddba | 531 | old_domain->transition_failed = true; |
26a2a1c9 | 532 | out: |
56f8c9bc TH |
533 | if (!domain) |
534 | domain = old_domain; | |
ec8e6a4e TH |
535 | /* Update reference count on "struct tomoyo_domain_info". */ |
536 | atomic_inc(&domain->users); | |
56f8c9bc | 537 | bprm->cred->security = domain; |
c8c57e84 TH |
538 | if (need_kfree) |
539 | kfree(rn.name); | |
8e2d39a1 | 540 | kfree(tmp); |
26a2a1c9 KT |
541 | return retval; |
542 | } |