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 TH |
112 | void tomoyo_check_acl(struct tomoyo_request_info *r, |
113 | bool (*check_entry) (const struct tomoyo_request_info *, | |
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 | ||
c3fa109a TH |
130 | /* |
131 | * tomoyo_domain_list is used for holding list of domains. | |
132 | * The ->acl_info_list of "struct tomoyo_domain_info" is used for holding | |
133 | * permissions (e.g. "allow_read /lib/libc-2.5.so") given to each domain. | |
134 | * | |
135 | * An entry is added by | |
136 | * | |
137 | * # ( echo "<kernel>"; echo "allow_execute /sbin/init" ) > \ | |
138 | * /sys/kernel/security/tomoyo/domain_policy | |
139 | * | |
140 | * and is deleted by | |
141 | * | |
142 | * # ( echo "<kernel>"; echo "delete allow_execute /sbin/init" ) > \ | |
143 | * /sys/kernel/security/tomoyo/domain_policy | |
144 | * | |
145 | * and all entries are retrieved by | |
146 | * | |
147 | * # cat /sys/kernel/security/tomoyo/domain_policy | |
148 | * | |
149 | * A domain is added by | |
150 | * | |
151 | * # echo "<kernel>" > /sys/kernel/security/tomoyo/domain_policy | |
152 | * | |
153 | * and is deleted by | |
154 | * | |
155 | * # echo "delete <kernel>" > /sys/kernel/security/tomoyo/domain_policy | |
156 | * | |
157 | * and all domains are retrieved by | |
158 | * | |
159 | * # grep '^<kernel>' /sys/kernel/security/tomoyo/domain_policy | |
160 | * | |
161 | * Normally, a domainname is monotonically getting longer because a domainname | |
162 | * which the process will belong to if an execve() operation succeeds is | |
163 | * defined as a concatenation of "current domainname" + "pathname passed to | |
164 | * execve()". | |
165 | * See tomoyo_domain_initializer_list and tomoyo_domain_keeper_list for | |
166 | * exceptions. | |
167 | */ | |
26a2a1c9 | 168 | LIST_HEAD(tomoyo_domain_list); |
26a2a1c9 | 169 | |
26a2a1c9 KT |
170 | /** |
171 | * tomoyo_get_last_name - Get last component of a domainname. | |
172 | * | |
173 | * @domain: Pointer to "struct tomoyo_domain_info". | |
174 | * | |
175 | * Returns the last component of the domainname. | |
176 | */ | |
177 | const char *tomoyo_get_last_name(const struct tomoyo_domain_info *domain) | |
178 | { | |
179 | const char *cp0 = domain->domainname->name; | |
180 | const char *cp1 = strrchr(cp0, ' '); | |
181 | ||
182 | if (cp1) | |
183 | return cp1 + 1; | |
184 | return cp0; | |
185 | } | |
186 | ||
c3fa109a TH |
187 | /* |
188 | * tomoyo_domain_initializer_list is used for holding list of programs which | |
189 | * triggers reinitialization of domainname. Normally, a domainname is | |
190 | * monotonically getting longer. But sometimes, we restart daemon programs. | |
191 | * It would be convenient for us that "a daemon started upon system boot" and | |
192 | * "the daemon restarted from console" belong to the same domain. Thus, TOMOYO | |
193 | * provides a way to shorten domainnames. | |
194 | * | |
195 | * An entry is added by | |
196 | * | |
197 | * # echo 'initialize_domain /usr/sbin/httpd' > \ | |
198 | * /sys/kernel/security/tomoyo/exception_policy | |
199 | * | |
200 | * and is deleted by | |
201 | * | |
202 | * # echo 'delete initialize_domain /usr/sbin/httpd' > \ | |
203 | * /sys/kernel/security/tomoyo/exception_policy | |
204 | * | |
205 | * and all entries are retrieved by | |
206 | * | |
207 | * # grep ^initialize_domain /sys/kernel/security/tomoyo/exception_policy | |
208 | * | |
209 | * In the example above, /usr/sbin/httpd will belong to | |
210 | * "<kernel> /usr/sbin/httpd" domain. | |
211 | * | |
212 | * You may specify a domainname using "from" keyword. | |
213 | * "initialize_domain /usr/sbin/httpd from <kernel> /etc/rc.d/init.d/httpd" | |
214 | * will cause "/usr/sbin/httpd" executed from "<kernel> /etc/rc.d/init.d/httpd" | |
215 | * domain to belong to "<kernel> /usr/sbin/httpd" domain. | |
216 | * | |
217 | * You may add "no_" prefix to "initialize_domain". | |
218 | * "initialize_domain /usr/sbin/httpd" and | |
219 | * "no_initialize_domain /usr/sbin/httpd from <kernel> /etc/rc.d/init.d/httpd" | |
220 | * will cause "/usr/sbin/httpd" to belong to "<kernel> /usr/sbin/httpd" domain | |
221 | * unless executed from "<kernel> /etc/rc.d/init.d/httpd" domain. | |
222 | */ | |
847b173e | 223 | LIST_HEAD(tomoyo_domain_initializer_list); |
26a2a1c9 | 224 | |
36f5e1ff TH |
225 | static bool tomoyo_same_domain_initializer_entry(const struct tomoyo_acl_head * |
226 | a, | |
227 | const struct tomoyo_acl_head * | |
228 | b) | |
229 | { | |
230 | const struct tomoyo_domain_initializer_entry *p1 = | |
231 | container_of(a, typeof(*p1), head); | |
232 | const struct tomoyo_domain_initializer_entry *p2 = | |
233 | container_of(b, typeof(*p2), head); | |
234 | return p1->is_not == p2->is_not && p1->is_last_name == p2->is_last_name | |
235 | && p1->domainname == p2->domainname | |
236 | && p1->program == p2->program; | |
237 | } | |
238 | ||
26a2a1c9 KT |
239 | /** |
240 | * tomoyo_update_domain_initializer_entry - Update "struct tomoyo_domain_initializer_entry" list. | |
241 | * | |
242 | * @domainname: The name of domain. May be NULL. | |
243 | * @program: The name of program. | |
244 | * @is_not: True if it is "no_initialize_domain" entry. | |
245 | * @is_delete: True if it is a delete request. | |
246 | * | |
247 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
248 | * |
249 | * Caller holds tomoyo_read_lock(). | |
26a2a1c9 KT |
250 | */ |
251 | static int tomoyo_update_domain_initializer_entry(const char *domainname, | |
252 | const char *program, | |
253 | const bool is_not, | |
254 | const bool is_delete) | |
255 | { | |
9e4b50e9 | 256 | struct tomoyo_domain_initializer_entry e = { .is_not = is_not }; |
ca0b7df3 | 257 | int error = is_delete ? -ENOENT : -ENOMEM; |
26a2a1c9 | 258 | |
3f629636 TH |
259 | if (!tomoyo_is_correct_path(program)) |
260 | return -EINVAL; | |
26a2a1c9 KT |
261 | if (domainname) { |
262 | if (!tomoyo_is_domain_def(domainname) && | |
3f629636 | 263 | tomoyo_is_correct_path(domainname)) |
9e4b50e9 | 264 | e.is_last_name = true; |
17080008 | 265 | else if (!tomoyo_is_correct_domain(domainname)) |
26a2a1c9 | 266 | return -EINVAL; |
9e4b50e9 TH |
267 | e.domainname = tomoyo_get_name(domainname); |
268 | if (!e.domainname) | |
ca0b7df3 | 269 | goto out; |
26a2a1c9 | 270 | } |
9e4b50e9 TH |
271 | e.program = tomoyo_get_name(program); |
272 | if (!e.program) | |
ca0b7df3 | 273 | goto out; |
36f5e1ff TH |
274 | error = tomoyo_update_policy(&e.head, sizeof(e), is_delete, |
275 | &tomoyo_domain_initializer_list, | |
276 | tomoyo_same_domain_initializer_entry); | |
ca0b7df3 | 277 | out: |
9e4b50e9 TH |
278 | tomoyo_put_name(e.domainname); |
279 | tomoyo_put_name(e.program); | |
26a2a1c9 KT |
280 | return error; |
281 | } | |
282 | ||
283 | /** | |
284 | * tomoyo_read_domain_initializer_policy - Read "struct tomoyo_domain_initializer_entry" list. | |
285 | * | |
286 | * @head: Pointer to "struct tomoyo_io_buffer". | |
287 | * | |
288 | * Returns true on success, false otherwise. | |
fdb8ebb7 TH |
289 | * |
290 | * Caller holds tomoyo_read_lock(). | |
26a2a1c9 KT |
291 | */ |
292 | bool tomoyo_read_domain_initializer_policy(struct tomoyo_io_buffer *head) | |
293 | { | |
294 | struct list_head *pos; | |
295 | bool done = true; | |
296 | ||
26a2a1c9 KT |
297 | list_for_each_cookie(pos, head->read_var2, |
298 | &tomoyo_domain_initializer_list) { | |
299 | const char *no; | |
300 | const char *from = ""; | |
301 | const char *domain = ""; | |
302 | struct tomoyo_domain_initializer_entry *ptr; | |
303 | ptr = list_entry(pos, struct tomoyo_domain_initializer_entry, | |
82e0f001 TH |
304 | head.list); |
305 | if (ptr->head.is_deleted) | |
26a2a1c9 KT |
306 | continue; |
307 | no = ptr->is_not ? "no_" : ""; | |
308 | if (ptr->domainname) { | |
309 | from = " from "; | |
310 | domain = ptr->domainname->name; | |
311 | } | |
7d2948b1 TH |
312 | done = tomoyo_io_printf(head, |
313 | "%s" TOMOYO_KEYWORD_INITIALIZE_DOMAIN | |
314 | "%s%s%s\n", no, ptr->program->name, | |
315 | from, domain); | |
316 | if (!done) | |
26a2a1c9 | 317 | break; |
26a2a1c9 | 318 | } |
26a2a1c9 KT |
319 | return done; |
320 | } | |
321 | ||
322 | /** | |
323 | * tomoyo_write_domain_initializer_policy - Write "struct tomoyo_domain_initializer_entry" list. | |
324 | * | |
325 | * @data: String to parse. | |
326 | * @is_not: True if it is "no_initialize_domain" entry. | |
327 | * @is_delete: True if it is a delete request. | |
328 | * | |
329 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
330 | * |
331 | * Caller holds tomoyo_read_lock(). | |
26a2a1c9 KT |
332 | */ |
333 | int tomoyo_write_domain_initializer_policy(char *data, const bool is_not, | |
334 | const bool is_delete) | |
335 | { | |
336 | char *cp = strstr(data, " from "); | |
337 | ||
338 | if (cp) { | |
339 | *cp = '\0'; | |
340 | return tomoyo_update_domain_initializer_entry(cp + 6, data, | |
341 | is_not, | |
342 | is_delete); | |
343 | } | |
344 | return tomoyo_update_domain_initializer_entry(NULL, data, is_not, | |
345 | is_delete); | |
346 | } | |
347 | ||
348 | /** | |
349 | * tomoyo_is_domain_initializer - Check whether the given program causes domainname reinitialization. | |
350 | * | |
351 | * @domainname: The name of domain. | |
352 | * @program: The name of program. | |
353 | * @last_name: The last component of @domainname. | |
354 | * | |
355 | * Returns true if executing @program reinitializes domain transition, | |
356 | * false otherwise. | |
fdb8ebb7 TH |
357 | * |
358 | * Caller holds tomoyo_read_lock(). | |
26a2a1c9 KT |
359 | */ |
360 | static bool tomoyo_is_domain_initializer(const struct tomoyo_path_info * | |
361 | domainname, | |
362 | const struct tomoyo_path_info *program, | |
363 | const struct tomoyo_path_info * | |
364 | last_name) | |
365 | { | |
366 | struct tomoyo_domain_initializer_entry *ptr; | |
367 | bool flag = false; | |
368 | ||
82e0f001 TH |
369 | list_for_each_entry_rcu(ptr, &tomoyo_domain_initializer_list, |
370 | head.list) { | |
371 | if (ptr->head.is_deleted) | |
26a2a1c9 KT |
372 | continue; |
373 | if (ptr->domainname) { | |
374 | if (!ptr->is_last_name) { | |
375 | if (ptr->domainname != domainname) | |
376 | continue; | |
377 | } else { | |
378 | if (tomoyo_pathcmp(ptr->domainname, last_name)) | |
379 | continue; | |
380 | } | |
381 | } | |
382 | if (tomoyo_pathcmp(ptr->program, program)) | |
383 | continue; | |
384 | if (ptr->is_not) { | |
385 | flag = false; | |
386 | break; | |
387 | } | |
388 | flag = true; | |
389 | } | |
26a2a1c9 KT |
390 | return flag; |
391 | } | |
392 | ||
c3fa109a TH |
393 | /* |
394 | * tomoyo_domain_keeper_list is used for holding list of domainnames which | |
395 | * suppresses domain transition. Normally, a domainname is monotonically | |
396 | * getting longer. But sometimes, we want to suppress domain transition. | |
397 | * It would be convenient for us that programs executed from a login session | |
398 | * belong to the same domain. Thus, TOMOYO provides a way to suppress domain | |
399 | * transition. | |
400 | * | |
401 | * An entry is added by | |
402 | * | |
403 | * # echo 'keep_domain <kernel> /usr/sbin/sshd /bin/bash' > \ | |
404 | * /sys/kernel/security/tomoyo/exception_policy | |
405 | * | |
406 | * and is deleted by | |
407 | * | |
408 | * # echo 'delete keep_domain <kernel> /usr/sbin/sshd /bin/bash' > \ | |
409 | * /sys/kernel/security/tomoyo/exception_policy | |
410 | * | |
411 | * and all entries are retrieved by | |
412 | * | |
413 | * # grep ^keep_domain /sys/kernel/security/tomoyo/exception_policy | |
414 | * | |
415 | * In the example above, any process which belongs to | |
416 | * "<kernel> /usr/sbin/sshd /bin/bash" domain will remain in that domain, | |
417 | * unless explicitly specified by "initialize_domain" or "no_keep_domain". | |
418 | * | |
419 | * You may specify a program using "from" keyword. | |
420 | * "keep_domain /bin/pwd from <kernel> /usr/sbin/sshd /bin/bash" | |
421 | * will cause "/bin/pwd" executed from "<kernel> /usr/sbin/sshd /bin/bash" | |
422 | * domain to remain in "<kernel> /usr/sbin/sshd /bin/bash" domain. | |
423 | * | |
424 | * You may add "no_" prefix to "keep_domain". | |
425 | * "keep_domain <kernel> /usr/sbin/sshd /bin/bash" and | |
426 | * "no_keep_domain /usr/bin/passwd from <kernel> /usr/sbin/sshd /bin/bash" will | |
427 | * cause "/usr/bin/passwd" to belong to | |
428 | * "<kernel> /usr/sbin/sshd /bin/bash /usr/bin/passwd" domain, unless | |
429 | * explicitly specified by "initialize_domain". | |
430 | */ | |
847b173e | 431 | LIST_HEAD(tomoyo_domain_keeper_list); |
26a2a1c9 | 432 | |
36f5e1ff TH |
433 | static bool tomoyo_same_domain_keeper_entry(const struct tomoyo_acl_head *a, |
434 | const struct tomoyo_acl_head *b) | |
435 | { | |
436 | const struct tomoyo_domain_keeper_entry *p1 = | |
437 | container_of(a, typeof(*p1), head); | |
438 | const struct tomoyo_domain_keeper_entry *p2 = | |
439 | container_of(b, typeof(*p2), head); | |
440 | return p1->is_not == p2->is_not && p1->is_last_name == p2->is_last_name | |
441 | && p1->domainname == p2->domainname | |
442 | && p1->program == p2->program; | |
443 | } | |
444 | ||
26a2a1c9 KT |
445 | /** |
446 | * tomoyo_update_domain_keeper_entry - Update "struct tomoyo_domain_keeper_entry" list. | |
447 | * | |
448 | * @domainname: The name of domain. | |
449 | * @program: The name of program. May be NULL. | |
450 | * @is_not: True if it is "no_keep_domain" entry. | |
451 | * @is_delete: True if it is a delete request. | |
452 | * | |
453 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
454 | * |
455 | * Caller holds tomoyo_read_lock(). | |
26a2a1c9 KT |
456 | */ |
457 | static int tomoyo_update_domain_keeper_entry(const char *domainname, | |
458 | const char *program, | |
459 | const bool is_not, | |
460 | const bool is_delete) | |
461 | { | |
9e4b50e9 | 462 | struct tomoyo_domain_keeper_entry e = { .is_not = is_not }; |
ca0b7df3 | 463 | int error = is_delete ? -ENOENT : -ENOMEM; |
26a2a1c9 KT |
464 | |
465 | if (!tomoyo_is_domain_def(domainname) && | |
3f629636 | 466 | tomoyo_is_correct_path(domainname)) |
9e4b50e9 | 467 | e.is_last_name = true; |
17080008 | 468 | else if (!tomoyo_is_correct_domain(domainname)) |
26a2a1c9 KT |
469 | return -EINVAL; |
470 | if (program) { | |
3f629636 | 471 | if (!tomoyo_is_correct_path(program)) |
26a2a1c9 | 472 | return -EINVAL; |
9e4b50e9 TH |
473 | e.program = tomoyo_get_name(program); |
474 | if (!e.program) | |
ca0b7df3 | 475 | goto out; |
26a2a1c9 | 476 | } |
9e4b50e9 TH |
477 | e.domainname = tomoyo_get_name(domainname); |
478 | if (!e.domainname) | |
ca0b7df3 | 479 | goto out; |
36f5e1ff TH |
480 | error = tomoyo_update_policy(&e.head, sizeof(e), is_delete, |
481 | &tomoyo_domain_keeper_list, | |
482 | tomoyo_same_domain_keeper_entry); | |
ca0b7df3 | 483 | out: |
9e4b50e9 TH |
484 | tomoyo_put_name(e.domainname); |
485 | tomoyo_put_name(e.program); | |
26a2a1c9 KT |
486 | return error; |
487 | } | |
488 | ||
489 | /** | |
490 | * tomoyo_write_domain_keeper_policy - Write "struct tomoyo_domain_keeper_entry" list. | |
491 | * | |
492 | * @data: String to parse. | |
493 | * @is_not: True if it is "no_keep_domain" entry. | |
494 | * @is_delete: True if it is a delete request. | |
495 | * | |
fdb8ebb7 | 496 | * Caller holds tomoyo_read_lock(). |
26a2a1c9 KT |
497 | */ |
498 | int tomoyo_write_domain_keeper_policy(char *data, const bool is_not, | |
499 | const bool is_delete) | |
500 | { | |
501 | char *cp = strstr(data, " from "); | |
502 | ||
503 | if (cp) { | |
504 | *cp = '\0'; | |
505 | return tomoyo_update_domain_keeper_entry(cp + 6, data, is_not, | |
506 | is_delete); | |
507 | } | |
508 | return tomoyo_update_domain_keeper_entry(data, NULL, is_not, is_delete); | |
509 | } | |
510 | ||
511 | /** | |
512 | * tomoyo_read_domain_keeper_policy - Read "struct tomoyo_domain_keeper_entry" list. | |
513 | * | |
514 | * @head: Pointer to "struct tomoyo_io_buffer". | |
515 | * | |
516 | * Returns true on success, false otherwise. | |
fdb8ebb7 TH |
517 | * |
518 | * Caller holds tomoyo_read_lock(). | |
26a2a1c9 KT |
519 | */ |
520 | bool tomoyo_read_domain_keeper_policy(struct tomoyo_io_buffer *head) | |
521 | { | |
522 | struct list_head *pos; | |
33043cbb | 523 | bool done = true; |
26a2a1c9 | 524 | |
26a2a1c9 KT |
525 | list_for_each_cookie(pos, head->read_var2, |
526 | &tomoyo_domain_keeper_list) { | |
527 | struct tomoyo_domain_keeper_entry *ptr; | |
528 | const char *no; | |
529 | const char *from = ""; | |
530 | const char *program = ""; | |
531 | ||
82e0f001 TH |
532 | ptr = list_entry(pos, struct tomoyo_domain_keeper_entry, |
533 | head.list); | |
534 | if (ptr->head.is_deleted) | |
26a2a1c9 KT |
535 | continue; |
536 | no = ptr->is_not ? "no_" : ""; | |
537 | if (ptr->program) { | |
538 | from = " from "; | |
539 | program = ptr->program->name; | |
540 | } | |
7d2948b1 TH |
541 | done = tomoyo_io_printf(head, |
542 | "%s" TOMOYO_KEYWORD_KEEP_DOMAIN | |
543 | "%s%s%s\n", no, program, from, | |
544 | ptr->domainname->name); | |
545 | if (!done) | |
26a2a1c9 | 546 | break; |
26a2a1c9 | 547 | } |
26a2a1c9 KT |
548 | return done; |
549 | } | |
550 | ||
551 | /** | |
552 | * tomoyo_is_domain_keeper - Check whether the given program causes domain transition suppression. | |
553 | * | |
554 | * @domainname: The name of domain. | |
555 | * @program: The name of program. | |
556 | * @last_name: The last component of @domainname. | |
557 | * | |
558 | * Returns true if executing @program supresses domain transition, | |
559 | * false otherwise. | |
fdb8ebb7 TH |
560 | * |
561 | * Caller holds tomoyo_read_lock(). | |
26a2a1c9 KT |
562 | */ |
563 | static bool tomoyo_is_domain_keeper(const struct tomoyo_path_info *domainname, | |
564 | const struct tomoyo_path_info *program, | |
565 | const struct tomoyo_path_info *last_name) | |
566 | { | |
567 | struct tomoyo_domain_keeper_entry *ptr; | |
568 | bool flag = false; | |
569 | ||
82e0f001 TH |
570 | list_for_each_entry_rcu(ptr, &tomoyo_domain_keeper_list, head.list) { |
571 | if (ptr->head.is_deleted) | |
26a2a1c9 KT |
572 | continue; |
573 | if (!ptr->is_last_name) { | |
574 | if (ptr->domainname != domainname) | |
575 | continue; | |
576 | } else { | |
577 | if (tomoyo_pathcmp(ptr->domainname, last_name)) | |
578 | continue; | |
579 | } | |
580 | if (ptr->program && tomoyo_pathcmp(ptr->program, program)) | |
581 | continue; | |
582 | if (ptr->is_not) { | |
583 | flag = false; | |
584 | break; | |
585 | } | |
586 | flag = true; | |
587 | } | |
26a2a1c9 KT |
588 | return flag; |
589 | } | |
590 | ||
1084307c TH |
591 | /* |
592 | * tomoyo_aggregator_list is used for holding list of rewrite table for | |
593 | * execve() request. Some programs provides similar functionality. This keyword | |
594 | * allows users to aggregate such programs. | |
595 | * | |
596 | * Entries are added by | |
597 | * | |
598 | * # echo 'aggregator /usr/bin/vi /./editor' > \ | |
599 | * /sys/kernel/security/tomoyo/exception_policy | |
600 | * # echo 'aggregator /usr/bin/emacs /./editor' > \ | |
601 | * /sys/kernel/security/tomoyo/exception_policy | |
602 | * | |
603 | * and are deleted by | |
604 | * | |
605 | * # echo 'delete aggregator /usr/bin/vi /./editor' > \ | |
606 | * /sys/kernel/security/tomoyo/exception_policy | |
607 | * # echo 'delete aggregator /usr/bin/emacs /./editor' > \ | |
608 | * /sys/kernel/security/tomoyo/exception_policy | |
609 | * | |
610 | * and all entries are retrieved by | |
611 | * | |
612 | * # grep ^aggregator /sys/kernel/security/tomoyo/exception_policy | |
613 | * | |
614 | * In the example above, if /usr/bin/vi or /usr/bin/emacs are executed, | |
615 | * permission is checked for /./editor and domainname which the current process | |
616 | * will belong to after execve() succeeds is calculated using /./editor . | |
617 | */ | |
618 | LIST_HEAD(tomoyo_aggregator_list); | |
619 | ||
36f5e1ff TH |
620 | static bool tomoyo_same_aggregator_entry(const struct tomoyo_acl_head *a, |
621 | const struct tomoyo_acl_head *b) | |
622 | { | |
623 | const struct tomoyo_aggregator_entry *p1 = container_of(a, typeof(*p1), | |
624 | head); | |
625 | const struct tomoyo_aggregator_entry *p2 = container_of(b, typeof(*p2), | |
626 | head); | |
627 | return p1->original_name == p2->original_name && | |
628 | p1->aggregated_name == p2->aggregated_name; | |
629 | } | |
630 | ||
1084307c TH |
631 | /** |
632 | * tomoyo_update_aggregator_entry - Update "struct tomoyo_aggregator_entry" list. | |
633 | * | |
634 | * @original_name: The original program's name. | |
635 | * @aggregated_name: The program name to use. | |
636 | * @is_delete: True if it is a delete request. | |
637 | * | |
638 | * Returns 0 on success, negative value otherwise. | |
639 | * | |
640 | * Caller holds tomoyo_read_lock(). | |
641 | */ | |
642 | static int tomoyo_update_aggregator_entry(const char *original_name, | |
643 | const char *aggregated_name, | |
644 | const bool is_delete) | |
645 | { | |
1084307c TH |
646 | struct tomoyo_aggregator_entry e = { }; |
647 | int error = is_delete ? -ENOENT : -ENOMEM; | |
648 | ||
649 | if (!tomoyo_is_correct_path(original_name) || | |
650 | !tomoyo_is_correct_path(aggregated_name)) | |
651 | return -EINVAL; | |
652 | e.original_name = tomoyo_get_name(original_name); | |
653 | e.aggregated_name = tomoyo_get_name(aggregated_name); | |
654 | if (!e.original_name || !e.aggregated_name || | |
655 | e.aggregated_name->is_patterned) /* No patterns allowed. */ | |
656 | goto out; | |
36f5e1ff TH |
657 | error = tomoyo_update_policy(&e.head, sizeof(e), is_delete, |
658 | &tomoyo_aggregator_list, | |
659 | tomoyo_same_aggregator_entry); | |
1084307c TH |
660 | out: |
661 | tomoyo_put_name(e.original_name); | |
662 | tomoyo_put_name(e.aggregated_name); | |
663 | return error; | |
664 | } | |
665 | ||
666 | /** | |
667 | * tomoyo_read_aggregator_policy - Read "struct tomoyo_aggregator_entry" list. | |
668 | * | |
669 | * @head: Pointer to "struct tomoyo_io_buffer". | |
670 | * | |
671 | * Returns true on success, false otherwise. | |
672 | * | |
673 | * Caller holds tomoyo_read_lock(). | |
674 | */ | |
675 | bool tomoyo_read_aggregator_policy(struct tomoyo_io_buffer *head) | |
676 | { | |
677 | struct list_head *pos; | |
678 | bool done = true; | |
679 | ||
680 | list_for_each_cookie(pos, head->read_var2, &tomoyo_aggregator_list) { | |
681 | struct tomoyo_aggregator_entry *ptr; | |
682 | ||
82e0f001 TH |
683 | ptr = list_entry(pos, struct tomoyo_aggregator_entry, |
684 | head.list); | |
685 | if (ptr->head.is_deleted) | |
1084307c TH |
686 | continue; |
687 | done = tomoyo_io_printf(head, TOMOYO_KEYWORD_AGGREGATOR | |
688 | "%s %s\n", ptr->original_name->name, | |
689 | ptr->aggregated_name->name); | |
690 | if (!done) | |
691 | break; | |
692 | } | |
693 | return done; | |
694 | } | |
695 | ||
696 | /** | |
697 | * tomoyo_write_aggregator_policy - Write "struct tomoyo_aggregator_entry" list. | |
698 | * | |
699 | * @data: String to parse. | |
700 | * @is_delete: True if it is a delete request. | |
701 | * | |
702 | * Returns 0 on success, negative value otherwise. | |
703 | * | |
704 | * Caller holds tomoyo_read_lock(). | |
705 | */ | |
706 | int tomoyo_write_aggregator_policy(char *data, const bool is_delete) | |
707 | { | |
708 | char *cp = strchr(data, ' '); | |
709 | ||
710 | if (!cp) | |
711 | return -EINVAL; | |
712 | *cp++ = '\0'; | |
713 | return tomoyo_update_aggregator_entry(data, cp, is_delete); | |
714 | } | |
715 | ||
c3fa109a TH |
716 | /* |
717 | * tomoyo_alias_list is used for holding list of symlink's pathnames which are | |
718 | * allowed to be passed to an execve() request. Normally, the domainname which | |
719 | * the current process will belong to after execve() succeeds is calculated | |
720 | * using dereferenced pathnames. But some programs behave differently depending | |
721 | * on the name passed to argv[0]. For busybox, calculating domainname using | |
722 | * dereferenced pathnames will cause all programs in the busybox to belong to | |
723 | * the same domain. Thus, TOMOYO provides a way to allow use of symlink's | |
724 | * pathname for checking execve()'s permission and calculating domainname which | |
725 | * the current process will belong to after execve() succeeds. | |
726 | * | |
727 | * An entry is added by | |
728 | * | |
729 | * # echo 'alias /bin/busybox /bin/cat' > \ | |
730 | * /sys/kernel/security/tomoyo/exception_policy | |
731 | * | |
732 | * and is deleted by | |
733 | * | |
734 | * # echo 'delete alias /bin/busybox /bin/cat' > \ | |
735 | * /sys/kernel/security/tomoyo/exception_policy | |
736 | * | |
737 | * and all entries are retrieved by | |
738 | * | |
739 | * # grep ^alias /sys/kernel/security/tomoyo/exception_policy | |
740 | * | |
741 | * In the example above, if /bin/cat is a symlink to /bin/busybox and execution | |
742 | * of /bin/cat is requested, permission is checked for /bin/cat rather than | |
743 | * /bin/busybox and domainname which the current process will belong to after | |
744 | * execve() succeeds is calculated using /bin/cat rather than /bin/busybox . | |
745 | */ | |
847b173e | 746 | LIST_HEAD(tomoyo_alias_list); |
26a2a1c9 | 747 | |
36f5e1ff TH |
748 | static bool tomoyo_same_alias_entry(const struct tomoyo_acl_head *a, |
749 | const struct tomoyo_acl_head *b) | |
750 | { | |
751 | const struct tomoyo_alias_entry *p1 = container_of(a, typeof(*p1), | |
752 | head); | |
753 | const struct tomoyo_alias_entry *p2 = container_of(b, typeof(*p2), | |
754 | head); | |
755 | return p1->original_name == p2->original_name && | |
756 | p1->aliased_name == p2->aliased_name; | |
757 | } | |
758 | ||
26a2a1c9 KT |
759 | /** |
760 | * tomoyo_update_alias_entry - Update "struct tomoyo_alias_entry" list. | |
761 | * | |
762 | * @original_name: The original program's real name. | |
763 | * @aliased_name: The symbolic program's symbolic link's name. | |
764 | * @is_delete: True if it is a delete request. | |
765 | * | |
766 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
767 | * |
768 | * Caller holds tomoyo_read_lock(). | |
26a2a1c9 KT |
769 | */ |
770 | static int tomoyo_update_alias_entry(const char *original_name, | |
771 | const char *aliased_name, | |
772 | const bool is_delete) | |
773 | { | |
9e4b50e9 | 774 | struct tomoyo_alias_entry e = { }; |
ca0b7df3 | 775 | int error = is_delete ? -ENOENT : -ENOMEM; |
26a2a1c9 | 776 | |
3f629636 TH |
777 | if (!tomoyo_is_correct_path(original_name) || |
778 | !tomoyo_is_correct_path(aliased_name)) | |
779 | return -EINVAL; | |
9e4b50e9 TH |
780 | e.original_name = tomoyo_get_name(original_name); |
781 | e.aliased_name = tomoyo_get_name(aliased_name); | |
3f629636 TH |
782 | if (!e.original_name || !e.aliased_name || |
783 | e.original_name->is_patterned || e.aliased_name->is_patterned) | |
784 | goto out; /* No patterns allowed. */ | |
36f5e1ff TH |
785 | error = tomoyo_update_policy(&e.head, sizeof(e), is_delete, |
786 | &tomoyo_alias_list, | |
787 | tomoyo_same_alias_entry); | |
ca0b7df3 | 788 | out: |
9e4b50e9 TH |
789 | tomoyo_put_name(e.original_name); |
790 | tomoyo_put_name(e.aliased_name); | |
26a2a1c9 KT |
791 | return error; |
792 | } | |
793 | ||
794 | /** | |
795 | * tomoyo_read_alias_policy - Read "struct tomoyo_alias_entry" list. | |
796 | * | |
797 | * @head: Pointer to "struct tomoyo_io_buffer". | |
798 | * | |
799 | * Returns true on success, false otherwise. | |
fdb8ebb7 TH |
800 | * |
801 | * Caller holds tomoyo_read_lock(). | |
26a2a1c9 KT |
802 | */ |
803 | bool tomoyo_read_alias_policy(struct tomoyo_io_buffer *head) | |
804 | { | |
805 | struct list_head *pos; | |
806 | bool done = true; | |
807 | ||
26a2a1c9 KT |
808 | list_for_each_cookie(pos, head->read_var2, &tomoyo_alias_list) { |
809 | struct tomoyo_alias_entry *ptr; | |
810 | ||
82e0f001 TH |
811 | ptr = list_entry(pos, struct tomoyo_alias_entry, head.list); |
812 | if (ptr->head.is_deleted) | |
26a2a1c9 | 813 | continue; |
7d2948b1 TH |
814 | done = tomoyo_io_printf(head, TOMOYO_KEYWORD_ALIAS "%s %s\n", |
815 | ptr->original_name->name, | |
816 | ptr->aliased_name->name); | |
817 | if (!done) | |
26a2a1c9 | 818 | break; |
26a2a1c9 | 819 | } |
26a2a1c9 KT |
820 | return done; |
821 | } | |
822 | ||
823 | /** | |
824 | * tomoyo_write_alias_policy - Write "struct tomoyo_alias_entry" list. | |
825 | * | |
826 | * @data: String to parse. | |
827 | * @is_delete: True if it is a delete request. | |
828 | * | |
829 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
830 | * |
831 | * Caller holds tomoyo_read_lock(). | |
26a2a1c9 KT |
832 | */ |
833 | int tomoyo_write_alias_policy(char *data, const bool is_delete) | |
834 | { | |
835 | char *cp = strchr(data, ' '); | |
836 | ||
837 | if (!cp) | |
838 | return -EINVAL; | |
839 | *cp++ = '\0'; | |
840 | return tomoyo_update_alias_entry(data, cp, is_delete); | |
841 | } | |
842 | ||
26a2a1c9 KT |
843 | /** |
844 | * tomoyo_find_or_assign_new_domain - Create a domain. | |
845 | * | |
846 | * @domainname: The name of domain. | |
847 | * @profile: Profile number to assign if the domain was newly created. | |
848 | * | |
849 | * Returns pointer to "struct tomoyo_domain_info" on success, NULL otherwise. | |
fdb8ebb7 TH |
850 | * |
851 | * Caller holds tomoyo_read_lock(). | |
26a2a1c9 KT |
852 | */ |
853 | struct tomoyo_domain_info *tomoyo_find_or_assign_new_domain(const char * | |
854 | domainname, | |
855 | const u8 profile) | |
856 | { | |
ca0b7df3 | 857 | struct tomoyo_domain_info *entry; |
29282381 | 858 | struct tomoyo_domain_info *domain = NULL; |
26a2a1c9 | 859 | const struct tomoyo_path_info *saved_domainname; |
ca0b7df3 | 860 | bool found = false; |
26a2a1c9 | 861 | |
17080008 | 862 | if (!tomoyo_is_correct_domain(domainname)) |
ca0b7df3 | 863 | return NULL; |
bf24fb01 | 864 | saved_domainname = tomoyo_get_name(domainname); |
26a2a1c9 | 865 | if (!saved_domainname) |
ca0b7df3 | 866 | return NULL; |
4e5d6f7e | 867 | entry = kzalloc(sizeof(*entry), GFP_NOFS); |
29282381 TH |
868 | if (mutex_lock_interruptible(&tomoyo_policy_lock)) |
869 | goto out; | |
ca0b7df3 TH |
870 | list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) { |
871 | if (domain->is_deleted || | |
872 | tomoyo_pathcmp(saved_domainname, domain->domainname)) | |
873 | continue; | |
874 | found = true; | |
875 | break; | |
876 | } | |
877 | if (!found && tomoyo_memory_ok(entry)) { | |
878 | INIT_LIST_HEAD(&entry->acl_info_list); | |
879 | entry->domainname = saved_domainname; | |
bf24fb01 | 880 | saved_domainname = NULL; |
ca0b7df3 TH |
881 | entry->profile = profile; |
882 | list_add_tail_rcu(&entry->list, &tomoyo_domain_list); | |
883 | domain = entry; | |
884 | entry = NULL; | |
885 | found = true; | |
26a2a1c9 | 886 | } |
f737d95d | 887 | mutex_unlock(&tomoyo_policy_lock); |
29282381 | 888 | out: |
bf24fb01 | 889 | tomoyo_put_name(saved_domainname); |
ca0b7df3 TH |
890 | kfree(entry); |
891 | return found ? domain : NULL; | |
26a2a1c9 KT |
892 | } |
893 | ||
894 | /** | |
895 | * tomoyo_find_next_domain - Find a domain. | |
896 | * | |
56f8c9bc | 897 | * @bprm: Pointer to "struct linux_binprm". |
26a2a1c9 KT |
898 | * |
899 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
900 | * |
901 | * Caller holds tomoyo_read_lock(). | |
26a2a1c9 | 902 | */ |
56f8c9bc | 903 | int tomoyo_find_next_domain(struct linux_binprm *bprm) |
26a2a1c9 | 904 | { |
17fcfbd9 | 905 | struct tomoyo_request_info r; |
c8c57e84 | 906 | char *tmp = kzalloc(TOMOYO_EXEC_TMPSIZE, GFP_NOFS); |
26a2a1c9 KT |
907 | struct tomoyo_domain_info *old_domain = tomoyo_domain(); |
908 | struct tomoyo_domain_info *domain = NULL; | |
909 | const char *old_domain_name = old_domain->domainname->name; | |
910 | const char *original_name = bprm->filename; | |
57c2590f TH |
911 | u8 mode; |
912 | bool is_enforce; | |
26a2a1c9 | 913 | int retval = -ENOMEM; |
c8c57e84 TH |
914 | bool need_kfree = false; |
915 | struct tomoyo_path_info rn = { }; /* real name */ | |
916 | struct tomoyo_path_info sn = { }; /* symlink name */ | |
17fcfbd9 | 917 | struct tomoyo_path_info ln; /* last name */ |
26a2a1c9 | 918 | |
c8c57e84 TH |
919 | ln.name = tomoyo_get_last_name(old_domain); |
920 | tomoyo_fill_path_info(&ln); | |
57c2590f TH |
921 | mode = tomoyo_init_request_info(&r, NULL, TOMOYO_MAC_FILE_EXECUTE); |
922 | is_enforce = (mode == TOMOYO_CONFIG_ENFORCING); | |
26a2a1c9 KT |
923 | if (!tmp) |
924 | goto out; | |
925 | ||
17fcfbd9 | 926 | retry: |
c8c57e84 TH |
927 | if (need_kfree) { |
928 | kfree(rn.name); | |
929 | need_kfree = false; | |
930 | } | |
26a2a1c9 KT |
931 | /* Get tomoyo_realpath of program. */ |
932 | retval = -ENOENT; | |
c8c57e84 TH |
933 | rn.name = tomoyo_realpath(original_name); |
934 | if (!rn.name) | |
26a2a1c9 | 935 | goto out; |
c8c57e84 TH |
936 | tomoyo_fill_path_info(&rn); |
937 | need_kfree = true; | |
938 | ||
26a2a1c9 | 939 | /* Get tomoyo_realpath of symbolic link. */ |
c8c57e84 TH |
940 | sn.name = tomoyo_realpath_nofollow(original_name); |
941 | if (!sn.name) | |
26a2a1c9 | 942 | goto out; |
17fcfbd9 | 943 | tomoyo_fill_path_info(&sn); |
26a2a1c9 KT |
944 | |
945 | /* Check 'alias' directive. */ | |
17fcfbd9 | 946 | if (tomoyo_pathcmp(&rn, &sn)) { |
26a2a1c9 KT |
947 | struct tomoyo_alias_entry *ptr; |
948 | /* Is this program allowed to be called via symbolic links? */ | |
82e0f001 TH |
949 | list_for_each_entry_rcu(ptr, &tomoyo_alias_list, head.list) { |
950 | if (ptr->head.is_deleted || | |
17fcfbd9 TH |
951 | tomoyo_pathcmp(&rn, ptr->original_name) || |
952 | tomoyo_pathcmp(&sn, ptr->aliased_name)) | |
26a2a1c9 | 953 | continue; |
c8c57e84 TH |
954 | kfree(rn.name); |
955 | need_kfree = false; | |
956 | /* This is OK because it is read only. */ | |
957 | rn = *ptr->aliased_name; | |
26a2a1c9 KT |
958 | break; |
959 | } | |
26a2a1c9 KT |
960 | } |
961 | ||
1084307c TH |
962 | /* Check 'aggregator' directive. */ |
963 | { | |
964 | struct tomoyo_aggregator_entry *ptr; | |
82e0f001 TH |
965 | list_for_each_entry_rcu(ptr, &tomoyo_aggregator_list, |
966 | head.list) { | |
967 | if (ptr->head.is_deleted || | |
1084307c TH |
968 | !tomoyo_path_matches_pattern(&rn, |
969 | ptr->original_name)) | |
970 | continue; | |
971 | if (need_kfree) | |
972 | kfree(rn.name); | |
973 | need_kfree = false; | |
974 | /* This is OK because it is read only. */ | |
975 | rn = *ptr->aggregated_name; | |
976 | break; | |
977 | } | |
978 | } | |
979 | ||
26a2a1c9 | 980 | /* Check execute permission. */ |
05336dee | 981 | retval = tomoyo_path_permission(&r, TOMOYO_TYPE_EXECUTE, &rn); |
17fcfbd9 TH |
982 | if (retval == TOMOYO_RETRY_REQUEST) |
983 | goto retry; | |
26a2a1c9 KT |
984 | if (retval < 0) |
985 | goto out; | |
986 | ||
17fcfbd9 | 987 | if (tomoyo_is_domain_initializer(old_domain->domainname, &rn, &ln)) { |
26a2a1c9 | 988 | /* Transit to the child of tomoyo_kernel_domain domain. */ |
c8c57e84 TH |
989 | snprintf(tmp, TOMOYO_EXEC_TMPSIZE - 1, |
990 | TOMOYO_ROOT_NAME " " "%s", rn.name); | |
26a2a1c9 KT |
991 | } else if (old_domain == &tomoyo_kernel_domain && |
992 | !tomoyo_policy_loaded) { | |
993 | /* | |
994 | * Needn't to transit from kernel domain before starting | |
995 | * /sbin/init. But transit from kernel domain if executing | |
996 | * initializers because they might start before /sbin/init. | |
997 | */ | |
998 | domain = old_domain; | |
17fcfbd9 | 999 | } else if (tomoyo_is_domain_keeper(old_domain->domainname, &rn, &ln)) { |
26a2a1c9 KT |
1000 | /* Keep current domain. */ |
1001 | domain = old_domain; | |
1002 | } else { | |
1003 | /* Normal domain transition. */ | |
c8c57e84 TH |
1004 | snprintf(tmp, TOMOYO_EXEC_TMPSIZE - 1, |
1005 | "%s %s", old_domain_name, rn.name); | |
26a2a1c9 | 1006 | } |
c8c57e84 | 1007 | if (domain || strlen(tmp) >= TOMOYO_EXEC_TMPSIZE - 10) |
26a2a1c9 | 1008 | goto done; |
c8c57e84 | 1009 | domain = tomoyo_find_domain(tmp); |
26a2a1c9 KT |
1010 | if (domain) |
1011 | goto done; | |
17fcfbd9 TH |
1012 | if (is_enforce) { |
1013 | int error = tomoyo_supervisor(&r, "# wants to create domain\n" | |
c8c57e84 | 1014 | "%s\n", tmp); |
17fcfbd9 TH |
1015 | if (error == TOMOYO_RETRY_REQUEST) |
1016 | goto retry; | |
1017 | if (error < 0) | |
1018 | goto done; | |
1019 | } | |
c8c57e84 | 1020 | domain = tomoyo_find_or_assign_new_domain(tmp, old_domain->profile); |
26a2a1c9 KT |
1021 | done: |
1022 | if (domain) | |
1023 | goto out; | |
c8c57e84 | 1024 | printk(KERN_WARNING "TOMOYO-ERROR: Domain '%s' not defined.\n", tmp); |
26a2a1c9 KT |
1025 | if (is_enforce) |
1026 | retval = -EPERM; | |
1027 | else | |
ea13ddba | 1028 | old_domain->transition_failed = true; |
26a2a1c9 | 1029 | out: |
56f8c9bc TH |
1030 | if (!domain) |
1031 | domain = old_domain; | |
ec8e6a4e TH |
1032 | /* Update reference count on "struct tomoyo_domain_info". */ |
1033 | atomic_inc(&domain->users); | |
56f8c9bc | 1034 | bprm->cred->security = domain; |
c8c57e84 TH |
1035 | if (need_kfree) |
1036 | kfree(rn.name); | |
1037 | kfree(sn.name); | |
8e2d39a1 | 1038 | kfree(tmp); |
26a2a1c9 KT |
1039 | return retval; |
1040 | } |