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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Security plug functions | |
3 | * | |
4 | * Copyright (C) 2001 WireX Communications, Inc <chris@wirex.com> | |
5 | * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com> | |
6 | * Copyright (C) 2001 Networks Associates Technology, Inc <ssmalley@nai.com> | |
d291f1a6 | 7 | * Copyright (C) 2016 Mellanox Technologies |
1da177e4 LT |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | */ | |
14 | ||
c59ede7b | 15 | #include <linux/capability.h> |
d47be3df | 16 | #include <linux/dcache.h> |
1da177e4 LT |
17 | #include <linux/module.h> |
18 | #include <linux/init.h> | |
19 | #include <linux/kernel.h> | |
3c4ed7bd | 20 | #include <linux/lsm_hooks.h> |
f381c272 | 21 | #include <linux/integrity.h> |
6c21a7fb | 22 | #include <linux/ima.h> |
3e1be52d | 23 | #include <linux/evm.h> |
40401530 | 24 | #include <linux/fsnotify.h> |
8b3ec681 AV |
25 | #include <linux/mman.h> |
26 | #include <linux/mount.h> | |
27 | #include <linux/personality.h> | |
75331a59 | 28 | #include <linux/backing-dev.h> |
3bb857e4 | 29 | #include <linux/string.h> |
ac8f82a0 | 30 | #include <linux/msg.h> |
ab5e2f3f | 31 | #include <linux/prctl.h> |
40401530 | 32 | #include <net/flow.h> |
ac8f82a0 | 33 | #include <net/sock.h> |
1da177e4 | 34 | |
823eb1cc | 35 | #define MAX_LSM_EVM_XATTR 2 |
1da177e4 | 36 | |
b1d9e6b0 CS |
37 | /* Maximum number of letters for an LSM name string */ |
38 | #define SECURITY_NAME_MAX 10 | |
2106feaf | 39 | #define SECURITY_CHOSEN_NAMES_MAX (SECURITY_NAME_MAX * LSM_MAX_MAJOR) |
a3c3cde2 | 40 | #define MODULE_STACK "(stacking)" |
b1d9e6b0 | 41 | |
3dfc9b02 | 42 | struct security_hook_heads security_hook_heads __lsm_ro_after_init; |
8f408ab6 DJ |
43 | static ATOMIC_NOTIFIER_HEAD(lsm_notifier_chain); |
44 | ||
d69dece5 | 45 | char *lsm_names; |
ab5e2f3f JJ |
46 | |
47 | /* | |
48 | * If stacking is enabled the task blob will always | |
49 | * include an indicator of what security module data | |
50 | * should be displayed. This is set with PR_SET_DISPLAY_LSM. | |
51 | */ | |
52 | static struct lsm_blob_sizes blob_sizes = { | |
53 | #ifdef CONFIG_SECURITY_STACKING | |
af50aca1 | 54 | .lbs_task = SECURITY_NAME_MAX + 6, |
ab5e2f3f JJ |
55 | #endif |
56 | }; | |
98738d70 | 57 | |
076c54c5 | 58 | /* Boot-time LSM user choice */ |
2106feaf | 59 | static __initdata char chosen_lsms[SECURITY_CHOSEN_NAMES_MAX + 1] = |
a3c3cde2 CS |
60 | #ifdef CONFIG_SECURITY_STACKING |
61 | MODULE_STACK; | |
62 | #else | |
6e65f92f | 63 | CONFIG_DEFAULT_SECURITY; |
a3c3cde2 | 64 | #endif |
d637d5bd JJ |
65 | static __initdata char chosen_display_lsm[SECURITY_NAME_MAX + 1] |
66 | #ifdef CONFIG_SECURITY_STACKING | |
67 | = CONFIG_SECURITY_DEFAULT_DISPLAY_NAME | |
68 | #endif | |
69 | ; | |
15d2143f | 70 | static char default_display_lsm[SECURITY_NAME_MAX + 1]; |
1da177e4 | 71 | |
1da177e4 LT |
72 | static void __init do_security_initcalls(void) |
73 | { | |
74 | initcall_t *call; | |
75 | call = __security_initcall_start; | |
76 | while (call < __security_initcall_end) { | |
77 | (*call) (); | |
78 | call++; | |
79 | } | |
80 | } | |
81 | ||
82 | /** | |
83 | * security_init - initializes the security framework | |
84 | * | |
85 | * This should be called early in the kernel initialization sequence. | |
86 | */ | |
87 | int __init security_init(void) | |
88 | { | |
3dfc9b02 TH |
89 | int i; |
90 | struct list_head *list = (struct list_head *) &security_hook_heads; | |
91 | ||
92 | for (i = 0; i < sizeof(security_hook_heads) / sizeof(struct list_head); | |
93 | i++) | |
94 | INIT_LIST_HEAD(&list[i]); | |
b1d9e6b0 | 95 | pr_info("Security Framework initialized\n"); |
1da177e4 | 96 | |
b1d9e6b0 | 97 | /* |
730daa16 | 98 | * Load minor LSMs, with the capability module always first. |
b1d9e6b0 CS |
99 | */ |
100 | capability_add_hooks(); | |
b1d9e6b0 | 101 | yama_add_hooks(); |
9b091556 | 102 | loadpin_add_hooks(); |
730daa16 | 103 | |
b1d9e6b0 | 104 | /* |
98738d70 CS |
105 | * The first call to a module specific init function |
106 | * updates the blob size requirements. | |
107 | */ | |
108 | do_security_initcalls(); | |
109 | ||
110 | /* | |
111 | * The second call to a module specific init function | |
112 | * adds hooks to the hook lists and does any other early | |
113 | * initializations required. | |
b1d9e6b0 | 114 | */ |
1da177e4 LT |
115 | do_security_initcalls(); |
116 | ||
98738d70 CS |
117 | #ifdef CONFIG_SECURITY_LSM_DEBUG |
118 | pr_info("LSM: cred blob size = %d\n", blob_sizes.lbs_cred); | |
004c5200 | 119 | pr_info("LSM: file blob size = %d\n", blob_sizes.lbs_file); |
ac8f82a0 CS |
120 | pr_info("LSM: inode blob size = %d\n", blob_sizes.lbs_inode); |
121 | pr_info("LSM: ipc blob size = %d\n", blob_sizes.lbs_ipc); | |
122 | #ifdef CONFIG_KEYS | |
123 | pr_info("LSM: key blob size = %d\n", blob_sizes.lbs_key); | |
124 | #endif /* CONFIG_KEYS */ | |
125 | pr_info("LSM: msg_msg blob size = %d\n", blob_sizes.lbs_msg_msg); | |
126 | pr_info("LSM: sock blob size = %d\n", blob_sizes.lbs_sock); | |
127 | pr_info("LSM: superblock blob size = %d\n", blob_sizes.lbs_superblock); | |
edcfdebc | 128 | pr_info("LSM: task blob size = %d\n", blob_sizes.lbs_task); |
ac8f82a0 | 129 | #endif /* CONFIG_SECURITY_LSM_DEBUG */ |
98738d70 | 130 | |
1da177e4 LT |
131 | return 0; |
132 | } | |
133 | ||
076c54c5 AD |
134 | /* Save user chosen LSM */ |
135 | static int __init choose_lsm(char *str) | |
136 | { | |
2106feaf JJ |
137 | strncpy(chosen_lsms, str, SECURITY_CHOSEN_NAMES_MAX); |
138 | pr_info("LSM: command line set '%s' security module(s).\n", | |
139 | chosen_lsms); | |
076c54c5 AD |
140 | return 1; |
141 | } | |
142 | __setup("security=", choose_lsm); | |
143 | ||
15d2143f JJ |
144 | static int __init choose_display_lsm(char *str) |
145 | { | |
146 | strncpy(chosen_display_lsm, str, SECURITY_NAME_MAX); | |
147 | pr_info("LSM: command line set default display lsm %s'\n", | |
148 | chosen_display_lsm); | |
149 | return 1; | |
150 | } | |
151 | __setup("security.display=", choose_display_lsm); | |
152 | ||
3bb857e4 MS |
153 | static bool match_last_lsm(const char *list, const char *lsm) |
154 | { | |
155 | const char *last; | |
156 | ||
157 | if (WARN_ON(!list || !lsm)) | |
158 | return false; | |
159 | last = strrchr(list, ','); | |
160 | if (last) | |
161 | /* Pass the comma, strcmp() will check for '\0' */ | |
162 | last++; | |
163 | else | |
164 | last = list; | |
165 | return !strcmp(last, lsm); | |
166 | } | |
167 | ||
d69dece5 CS |
168 | static int lsm_append(char *new, char **result) |
169 | { | |
170 | char *cp; | |
171 | ||
172 | if (*result == NULL) { | |
173 | *result = kstrdup(new, GFP_KERNEL); | |
174 | } else { | |
3bb857e4 MS |
175 | /* Check if it is the last registered name */ |
176 | if (match_last_lsm(*result, new)) | |
177 | return 0; | |
d69dece5 CS |
178 | cp = kasprintf(GFP_KERNEL, "%s,%s", *result, new); |
179 | if (cp == NULL) | |
180 | return -ENOMEM; | |
181 | kfree(*result); | |
182 | *result = cp; | |
183 | } | |
184 | return 0; | |
185 | } | |
186 | ||
076c54c5 AD |
187 | /** |
188 | * security_module_enable - Load given security module on boot ? | |
b1d9e6b0 | 189 | * @module: the name of the module |
a3c3cde2 | 190 | * @stacked: indicates that the module wants to be stacked |
076c54c5 AD |
191 | * |
192 | * Each LSM must pass this method before registering its own operations | |
193 | * to avoid security registration races. This method may also be used | |
7cea51be | 194 | * to check if your LSM is currently loaded during kernel initialization. |
076c54c5 | 195 | * |
0e056eb5 MCC |
196 | * Returns: |
197 | * | |
198 | * true if: | |
199 | * | |
200 | * - The passed LSM is the one chosen by user at boot time, | |
201 | * - or the passed LSM is configured as the default and the user did not | |
202 | * choose an alternate LSM at boot time. | |
203 | * | |
076c54c5 AD |
204 | * Otherwise, return false. |
205 | */ | |
2106feaf JJ |
206 | #ifdef CONFIG_SECURITY_STACKING |
207 | static bool __init cmp_lsms(const char *lsm) | |
208 | { | |
209 | const char *str = chosen_lsms; | |
210 | const char *split; | |
211 | int len = strlen(lsm); | |
212 | ||
213 | if (len > SECURITY_NAME_MAX) { | |
214 | pr_info("LSM: security module name '%s' exceeds limit\n", lsm); | |
215 | return false; | |
216 | } | |
217 | for (split = strchr(str, ','); split; split = strchr(str, ',')) { | |
218 | if ((len == split - str) && !strncmp(lsm, str, split - str)) | |
219 | return true; | |
220 | str = split + 1; | |
221 | } | |
222 | if ((len == strlen(str)) && !strncmp(lsm, str, strlen(str))) | |
223 | return true; | |
224 | return false; | |
225 | } | |
226 | #endif | |
227 | ||
a3c3cde2 | 228 | bool __init security_module_enable(const char *lsm, const bool stacked) |
076c54c5 | 229 | { |
a3c3cde2 CS |
230 | #ifdef CONFIG_SECURITY_STACKING |
231 | /* | |
232 | * Module defined on the command line security=XXXX | |
233 | */ | |
15d2143f JJ |
234 | if (strcmp(chosen_lsms, MODULE_STACK)) { |
235 | if (cmp_lsms(lsm)) { | |
236 | /* set to first LSM registered and then override */ | |
237 | if (!*default_display_lsm) | |
238 | strcpy(default_display_lsm, lsm); | |
239 | else if (*chosen_display_lsm && !strcmp(chosen_display_lsm, lsm)) { | |
240 | strcpy(default_display_lsm, lsm); | |
241 | pr_info("LSM: default display lsm '%s'\n", default_display_lsm); | |
242 | } | |
243 | return true; | |
244 | } | |
245 | return false; | |
246 | } | |
a3c3cde2 CS |
247 | /* |
248 | * Module configured as stacked. | |
249 | */ | |
15d2143f JJ |
250 | if (stacked && !*default_display_lsm) |
251 | strcpy(default_display_lsm, lsm); | |
252 | else if (stacked && *chosen_display_lsm && !strcmp(chosen_display_lsm, lsm)) { | |
253 | strcpy(default_display_lsm, lsm); | |
254 | pr_info("LSM: default display lsm '%s'\n", default_display_lsm); | |
255 | } | |
256 | ||
a3c3cde2 CS |
257 | return stacked; |
258 | #else | |
15d2143f JJ |
259 | if (strcmp(lsm, chosen_lsms) == 0) { |
260 | strcpy(default_display_lsm, lsm); | |
a3c3cde2 | 261 | return true; |
15d2143f | 262 | } |
a3c3cde2 CS |
263 | return false; |
264 | #endif | |
076c54c5 AD |
265 | } |
266 | ||
7faa33fe JJ |
267 | /* |
268 | * Keep the order of major modules for mapping secids. | |
269 | */ | |
270 | static int lsm_next_major; | |
271 | ||
d69dece5 CS |
272 | /** |
273 | * security_add_hooks - Add a modules hooks to the hook lists. | |
274 | * @hooks: the hooks to add | |
275 | * @count: the number of hooks to add | |
276 | * @lsm: the name of the security module | |
277 | * | |
278 | * Each LSM has to register its hooks with the infrastructure. | |
279 | */ | |
280 | void __init security_add_hooks(struct security_hook_list *hooks, int count, | |
281 | char *lsm) | |
282 | { | |
283 | int i; | |
7faa33fe JJ |
284 | int lsm_index = lsm_next_major++; |
285 | ||
286 | #ifdef CONFIG_SECURITY_LSM_DEBUG | |
287 | pr_info("LSM: Security module %s gets index %d\n", lsm, lsm_index); | |
288 | #endif | |
d69dece5 CS |
289 | for (i = 0; i < count; i++) { |
290 | hooks[i].lsm = lsm; | |
7faa33fe | 291 | hooks[i].lsm_index = lsm_index; |
d69dece5 CS |
292 | list_add_tail_rcu(&hooks[i].list, hooks[i].head); |
293 | } | |
294 | if (lsm_append(lsm, &lsm_names) < 0) | |
295 | panic("%s - Cannot get early memory.\n", __func__); | |
296 | } | |
297 | ||
8f408ab6 DJ |
298 | int call_lsm_notifier(enum lsm_event event, void *data) |
299 | { | |
300 | return atomic_notifier_call_chain(&lsm_notifier_chain, event, data); | |
301 | } | |
302 | EXPORT_SYMBOL(call_lsm_notifier); | |
303 | ||
304 | int register_lsm_notifier(struct notifier_block *nb) | |
305 | { | |
306 | return atomic_notifier_chain_register(&lsm_notifier_chain, nb); | |
307 | } | |
308 | EXPORT_SYMBOL(register_lsm_notifier); | |
309 | ||
310 | int unregister_lsm_notifier(struct notifier_block *nb) | |
311 | { | |
312 | return atomic_notifier_chain_unregister(&lsm_notifier_chain, nb); | |
313 | } | |
314 | EXPORT_SYMBOL(unregister_lsm_notifier); | |
315 | ||
98738d70 CS |
316 | /** |
317 | * lsm_cred_alloc - allocate a composite cred blob | |
318 | * @cred: the cred that needs a blob | |
319 | * @gfp: allocation type | |
320 | * | |
321 | * Allocate the cred blob for all the modules | |
322 | * | |
323 | * Returns 0, or -ENOMEM if memory can't be allocated. | |
324 | */ | |
325 | int lsm_cred_alloc(struct cred *cred, gfp_t gfp) | |
326 | { | |
327 | #ifdef CONFIG_SECURITY_LSM_DEBUG | |
328 | if (cred->security) | |
329 | pr_info("%s: Inbound cred blob is not NULL.\n", __func__); | |
330 | #endif | |
331 | if (blob_sizes.lbs_cred == 0) | |
332 | return 0; | |
333 | ||
334 | cred->security = kzalloc(blob_sizes.lbs_cred, gfp); | |
335 | if (cred->security == NULL) | |
336 | return -ENOMEM; | |
337 | return 0; | |
338 | } | |
339 | ||
340 | /** | |
341 | * lsm_early_cred - during initialization allocate a composite cred blob | |
342 | * @cred: the cred that needs a blob | |
343 | * | |
344 | * Allocate the cred blob for all the modules if it's not already there | |
345 | */ | |
346 | void lsm_early_cred(struct cred *cred) | |
347 | { | |
348 | int rc; | |
349 | ||
350 | if (cred == NULL) | |
351 | panic("%s: NULL cred.\n", __func__); | |
352 | if (cred->security != NULL) | |
353 | return; | |
354 | rc = lsm_cred_alloc(cred, GFP_KERNEL); | |
355 | if (rc) | |
356 | panic("%s: Early cred alloc failed.\n", __func__); | |
357 | } | |
358 | ||
359 | static void __init lsm_set_size(int *need, int *lbs) | |
360 | { | |
361 | int offset; | |
362 | ||
363 | if (*need > 0) { | |
364 | offset = *lbs; | |
365 | *lbs += *need; | |
366 | *need = offset; | |
367 | } | |
368 | } | |
369 | ||
370 | /** | |
371 | * security_add_blobs - Report blob sizes | |
372 | * @needed: the size of blobs needed by the module | |
373 | * | |
374 | * Each LSM has to register its blobs with the infrastructure. | |
375 | * The "needed" data tells the infrastructure how much memory | |
376 | * the module requires for each of its blobs. On return the | |
377 | * structure is filled with the offset that module should use | |
378 | * from the blob pointer. | |
379 | */ | |
380 | void __init security_add_blobs(struct lsm_blob_sizes *needed) | |
381 | { | |
382 | lsm_set_size(&needed->lbs_cred, &blob_sizes.lbs_cred); | |
004c5200 | 383 | lsm_set_size(&needed->lbs_file, &blob_sizes.lbs_file); |
ac8f82a0 CS |
384 | lsm_set_size(&needed->lbs_ipc, &blob_sizes.lbs_ipc); |
385 | lsm_set_size(&needed->lbs_key, &blob_sizes.lbs_key); | |
386 | lsm_set_size(&needed->lbs_msg_msg, &blob_sizes.lbs_msg_msg); | |
387 | lsm_set_size(&needed->lbs_sock, &blob_sizes.lbs_sock); | |
388 | lsm_set_size(&needed->lbs_superblock, &blob_sizes.lbs_superblock); | |
edcfdebc | 389 | lsm_set_size(&needed->lbs_task, &blob_sizes.lbs_task); |
ac8f82a0 CS |
390 | /* |
391 | * The inode blob gets an rcu_head in addition to | |
392 | * what the modules might need. | |
393 | */ | |
394 | if (needed->lbs_inode && blob_sizes.lbs_inode == 0) | |
395 | blob_sizes.lbs_inode = sizeof(struct rcu_head); | |
396 | lsm_set_size(&needed->lbs_inode, &blob_sizes.lbs_inode); | |
004c5200 CS |
397 | } |
398 | ||
399 | /** | |
400 | * lsm_file_alloc - allocate a composite file blob | |
401 | * @file: the file that needs a blob | |
402 | * | |
403 | * Allocate the file blob for all the modules | |
404 | * | |
405 | * Returns 0, or -ENOMEM if memory can't be allocated. | |
406 | */ | |
407 | int lsm_file_alloc(struct file *file) | |
408 | { | |
409 | #ifdef CONFIG_SECURITY_LSM_DEBUG | |
410 | if (file->f_security) | |
411 | pr_info("%s: Inbound file blob is not NULL.\n", __func__); | |
412 | #endif | |
413 | if (blob_sizes.lbs_file == 0) | |
414 | return 0; | |
415 | ||
416 | file->f_security = kzalloc(blob_sizes.lbs_file, GFP_KERNEL); | |
417 | if (file->f_security == NULL) | |
418 | return -ENOMEM; | |
419 | return 0; | |
98738d70 CS |
420 | } |
421 | ||
ab5e2f3f JJ |
422 | #ifdef CONFIG_SECURITY_STACKING |
423 | static inline char *lsm_of_task(struct task_struct *task) | |
424 | { | |
425 | #ifdef CONFIG_SECURITY_LSM_DEBUG | |
426 | if (task->security == NULL) | |
427 | pr_info("%s: task has no lsm name.\n", __func__); | |
428 | #endif | |
429 | return task->security; | |
430 | } | |
431 | #endif | |
432 | ||
433 | #ifdef CONFIG_SECURITY_STACKING | |
434 | struct lsm_value { | |
435 | char *lsm; | |
436 | char *data; | |
437 | }; | |
438 | ||
439 | /** | |
440 | * lsm_parse_context - break a compound "context" into module data | |
441 | * @cxt: the initial data, which will be modified | |
442 | * @vlist: an array to receive the results | |
443 | * | |
444 | * Returns the number of entries, or -EINVAL if the cxt is unworkable. | |
445 | */ | |
446 | static int lsm_parse_context(char *cxt, struct lsm_value *vlist) | |
447 | { | |
448 | char *lsm; | |
449 | char *data; | |
450 | char *cp; | |
451 | int i; | |
452 | ||
453 | lsm = cxt; | |
454 | for (i = 0; i < LSM_MAX_MAJOR; i++) { | |
455 | data = strstr(lsm, "='"); | |
456 | if (!data) | |
457 | break; | |
458 | *data = '\0'; | |
459 | data += 2; | |
460 | cp = strchr(data, '\''); | |
461 | if (!cp) | |
462 | return -EINVAL; | |
463 | *cp++ = '\0'; | |
464 | vlist[i].lsm = lsm; | |
465 | vlist[i].data = data; | |
466 | if (*cp == '\0') { | |
467 | i++; | |
468 | break; | |
469 | } | |
470 | if (*cp == ',') | |
471 | cp++; | |
472 | else | |
473 | return -EINVAL; | |
474 | lsm = cp; | |
475 | } | |
476 | return i; | |
477 | } | |
478 | #endif /* CONFIG_SECURITY_STACKING */ | |
479 | ||
edcfdebc CS |
480 | /** |
481 | * lsm_task_alloc - allocate a composite task blob | |
482 | * @task: the task that needs a blob | |
483 | * | |
484 | * Allocate the task blob for all the modules | |
485 | * | |
486 | * Returns 0, or -ENOMEM if memory can't be allocated. | |
487 | */ | |
488 | int lsm_task_alloc(struct task_struct *task) | |
489 | { | |
490 | #ifdef CONFIG_SECURITY_LSM_DEBUG | |
491 | if (task->security) | |
492 | pr_info("%s: Inbound task blob is not NULL.\n", __func__); | |
493 | #endif | |
494 | if (blob_sizes.lbs_task == 0) | |
495 | return 0; | |
496 | ||
497 | task->security = kzalloc(blob_sizes.lbs_task, GFP_KERNEL); | |
498 | if (task->security == NULL) | |
499 | return -ENOMEM; | |
f37cb143 JJ |
500 | |
501 | /* inherit current display lsm */ | |
502 | #ifdef CONFIG_SECURITY_STACKING | |
503 | if (current->security) | |
504 | strcpy(task->security, lsm_of_task(current)); | |
15d2143f JJ |
505 | else |
506 | strcpy(task->security, default_display_lsm); | |
f37cb143 | 507 | #endif |
edcfdebc CS |
508 | return 0; |
509 | } | |
510 | ||
ac8f82a0 CS |
511 | /** |
512 | * lsm_inode_alloc - allocate a composite inode blob | |
513 | * @inode: the inode that needs a blob | |
514 | * | |
515 | * Allocate the inode blob for all the modules | |
516 | * | |
517 | * Returns 0, or -ENOMEM if memory can't be allocated. | |
518 | */ | |
519 | int lsm_inode_alloc(struct inode *inode) | |
520 | { | |
521 | #ifdef CONFIG_SECURITY_LSM_DEBUG | |
522 | if (inode->i_security) | |
523 | pr_info("%s: Inbound inode blob is not NULL.\n", __func__); | |
524 | #endif | |
525 | if (blob_sizes.lbs_inode == 0) | |
526 | return 0; | |
527 | ||
528 | inode->i_security = kzalloc(blob_sizes.lbs_inode, GFP_KERNEL); | |
529 | if (inode->i_security == NULL) | |
530 | return -ENOMEM; | |
531 | return 0; | |
532 | } | |
533 | ||
534 | /** | |
535 | * lsm_early_inode - during initialization allocate a composite inode blob | |
536 | * @inode: the inode that needs a blob | |
537 | * | |
538 | * Allocate the inode blob for all the modules if it's not already there | |
539 | */ | |
540 | void lsm_early_inode(struct inode *inode) | |
541 | { | |
542 | int rc; | |
543 | ||
544 | if (inode == NULL) | |
545 | panic("%s: NULL inode.\n", __func__); | |
546 | if (inode->i_security != NULL) | |
547 | return; | |
548 | rc = lsm_inode_alloc(inode); | |
549 | if (rc) | |
550 | panic("%s: Early inode alloc failed.\n", __func__); | |
551 | } | |
552 | ||
553 | /** | |
554 | * lsm_ipc_alloc - allocate a composite ipc blob | |
555 | * @kip: the ipc that needs a blob | |
556 | * | |
557 | * Allocate the ipc blob for all the modules | |
558 | * | |
559 | * Returns 0, or -ENOMEM if memory can't be allocated. | |
560 | */ | |
561 | int lsm_ipc_alloc(struct kern_ipc_perm *kip) | |
562 | { | |
563 | #ifdef CONFIG_SECURITY_LSM_DEBUG | |
564 | if (kip->security) | |
565 | pr_info("%s: Inbound ipc blob is not NULL.\n", __func__); | |
566 | #endif | |
567 | if (blob_sizes.lbs_ipc == 0) | |
568 | return 0; | |
569 | ||
570 | kip->security = kzalloc(blob_sizes.lbs_ipc, GFP_KERNEL); | |
571 | if (kip->security == NULL) | |
572 | return -ENOMEM; | |
573 | return 0; | |
574 | } | |
575 | ||
576 | #ifdef CONFIG_KEYS | |
577 | /** | |
578 | * lsm_key_alloc - allocate a composite key blob | |
579 | * @key: the key that needs a blob | |
580 | * | |
581 | * Allocate the key blob for all the modules | |
582 | * | |
583 | * Returns 0, or -ENOMEM if memory can't be allocated. | |
584 | */ | |
585 | int lsm_key_alloc(struct key *key) | |
586 | { | |
587 | #ifdef CONFIG_SECURITY_LSM_DEBUG | |
588 | if (key->security) | |
589 | pr_info("%s: Inbound key blob is not NULL.\n", __func__); | |
590 | #endif | |
591 | if (blob_sizes.lbs_key == 0) | |
592 | return 0; | |
593 | ||
594 | key->security = kzalloc(blob_sizes.lbs_key, GFP_KERNEL); | |
595 | if (key->security == NULL) | |
596 | return -ENOMEM; | |
597 | return 0; | |
598 | } | |
599 | #endif /* CONFIG_KEYS */ | |
600 | ||
601 | /** | |
602 | * lsm_msg_msg_alloc - allocate a composite msg_msg blob | |
603 | * @mp: the msg_msg that needs a blob | |
604 | * | |
605 | * Allocate the ipc blob for all the modules | |
606 | * | |
607 | * Returns 0, or -ENOMEM if memory can't be allocated. | |
608 | */ | |
609 | int lsm_msg_msg_alloc(struct msg_msg *mp) | |
610 | { | |
611 | #ifdef CONFIG_SECURITY_LSM_DEBUG | |
612 | if (mp->security) | |
613 | pr_info("%s: Inbound msg_msg blob is not NULL.\n", __func__); | |
614 | #endif | |
615 | if (blob_sizes.lbs_msg_msg == 0) | |
616 | return 0; | |
617 | ||
618 | mp->security = kzalloc(blob_sizes.lbs_msg_msg, GFP_KERNEL); | |
619 | if (mp->security == NULL) | |
620 | return -ENOMEM; | |
621 | return 0; | |
622 | } | |
623 | ||
624 | /** | |
625 | * lsm_sock_alloc - allocate a composite sock blob | |
626 | * @sock: the sock that needs a blob | |
627 | * @priority: allocation mode | |
628 | * | |
629 | * Allocate the sock blob for all the modules | |
630 | * | |
631 | * Returns 0, or -ENOMEM if memory can't be allocated. | |
632 | */ | |
633 | int lsm_sock_alloc(struct sock *sock, gfp_t priority) | |
634 | { | |
635 | #ifdef CONFIG_SECURITY_LSM_DEBUG | |
636 | if (sock->sk_security) | |
637 | pr_info("%s: Inbound sock blob is not NULL.\n", __func__); | |
638 | #endif | |
639 | if (blob_sizes.lbs_sock == 0) | |
640 | return 0; | |
641 | ||
642 | sock->sk_security = kzalloc(blob_sizes.lbs_sock, priority); | |
643 | if (sock->sk_security == NULL) | |
644 | return -ENOMEM; | |
645 | return 0; | |
646 | } | |
647 | ||
648 | /** | |
649 | * lsm_superblock_alloc - allocate a composite superblock blob | |
650 | * @sb: the superblock that needs a blob | |
651 | * | |
652 | * Allocate the superblock blob for all the modules | |
653 | * | |
654 | * Returns 0, or -ENOMEM if memory can't be allocated. | |
655 | */ | |
656 | int lsm_superblock_alloc(struct super_block *sb) | |
657 | { | |
658 | #ifdef CONFIG_SECURITY_LSM_DEBUG | |
659 | if (sb->s_security) | |
660 | pr_info("%s: Inbound superblock blob is not NULL.\n", __func__); | |
661 | #endif | |
662 | if (blob_sizes.lbs_superblock == 0) | |
663 | return 0; | |
664 | ||
665 | sb->s_security = kzalloc(blob_sizes.lbs_superblock, GFP_KERNEL); | |
666 | if (sb->s_security == NULL) | |
667 | return -ENOMEM; | |
668 | return 0; | |
669 | } | |
670 | ||
f25fce3e | 671 | /* |
b1d9e6b0 | 672 | * Hook list operation macros. |
1da177e4 | 673 | * |
f25fce3e CS |
674 | * call_void_hook: |
675 | * This is a hook that does not return a value. | |
1da177e4 | 676 | * |
f25fce3e CS |
677 | * call_int_hook: |
678 | * This is a hook that returns a value. | |
1da177e4 | 679 | */ |
1da177e4 | 680 | |
b1d9e6b0 CS |
681 | #define call_void_hook(FUNC, ...) \ |
682 | do { \ | |
683 | struct security_hook_list *P; \ | |
684 | \ | |
685 | list_for_each_entry(P, &security_hook_heads.FUNC, list) \ | |
686 | P->hook.FUNC(__VA_ARGS__); \ | |
687 | } while (0) | |
688 | ||
689 | #define call_int_hook(FUNC, IRC, ...) ({ \ | |
690 | int RC = IRC; \ | |
691 | do { \ | |
692 | struct security_hook_list *P; \ | |
693 | \ | |
694 | list_for_each_entry(P, &security_hook_heads.FUNC, list) { \ | |
695 | RC = P->hook.FUNC(__VA_ARGS__); \ | |
696 | if (RC != 0) \ | |
697 | break; \ | |
698 | } \ | |
699 | } while (0); \ | |
700 | RC; \ | |
701 | }) | |
1da177e4 | 702 | |
20510f2f JM |
703 | /* Security operations */ |
704 | ||
79af7307 SS |
705 | int security_binder_set_context_mgr(struct task_struct *mgr) |
706 | { | |
f25fce3e | 707 | return call_int_hook(binder_set_context_mgr, 0, mgr); |
79af7307 SS |
708 | } |
709 | ||
710 | int security_binder_transaction(struct task_struct *from, | |
711 | struct task_struct *to) | |
712 | { | |
f25fce3e | 713 | return call_int_hook(binder_transaction, 0, from, to); |
79af7307 SS |
714 | } |
715 | ||
716 | int security_binder_transfer_binder(struct task_struct *from, | |
717 | struct task_struct *to) | |
718 | { | |
f25fce3e | 719 | return call_int_hook(binder_transfer_binder, 0, from, to); |
79af7307 SS |
720 | } |
721 | ||
722 | int security_binder_transfer_file(struct task_struct *from, | |
723 | struct task_struct *to, struct file *file) | |
724 | { | |
f25fce3e | 725 | return call_int_hook(binder_transfer_file, 0, from, to, file); |
79af7307 SS |
726 | } |
727 | ||
9e48858f | 728 | int security_ptrace_access_check(struct task_struct *child, unsigned int mode) |
20510f2f | 729 | { |
f25fce3e | 730 | return call_int_hook(ptrace_access_check, 0, child, mode); |
5cd9c58f DH |
731 | } |
732 | ||
733 | int security_ptrace_traceme(struct task_struct *parent) | |
734 | { | |
f25fce3e | 735 | return call_int_hook(ptrace_traceme, 0, parent); |
20510f2f JM |
736 | } |
737 | ||
738 | int security_capget(struct task_struct *target, | |
739 | kernel_cap_t *effective, | |
740 | kernel_cap_t *inheritable, | |
741 | kernel_cap_t *permitted) | |
742 | { | |
f25fce3e CS |
743 | return call_int_hook(capget, 0, target, |
744 | effective, inheritable, permitted); | |
20510f2f JM |
745 | } |
746 | ||
d84f4f99 DH |
747 | int security_capset(struct cred *new, const struct cred *old, |
748 | const kernel_cap_t *effective, | |
749 | const kernel_cap_t *inheritable, | |
750 | const kernel_cap_t *permitted) | |
20510f2f | 751 | { |
f25fce3e CS |
752 | return call_int_hook(capset, 0, new, old, |
753 | effective, inheritable, permitted); | |
20510f2f JM |
754 | } |
755 | ||
b7e724d3 | 756 | int security_capable(const struct cred *cred, struct user_namespace *ns, |
3486740a | 757 | int cap) |
20510f2f | 758 | { |
f25fce3e | 759 | return call_int_hook(capable, 0, cred, ns, cap, SECURITY_CAP_AUDIT); |
06112163 EP |
760 | } |
761 | ||
c7eba4a9 EP |
762 | int security_capable_noaudit(const struct cred *cred, struct user_namespace *ns, |
763 | int cap) | |
06112163 | 764 | { |
f25fce3e | 765 | return call_int_hook(capable, 0, cred, ns, cap, SECURITY_CAP_NOAUDIT); |
20510f2f JM |
766 | } |
767 | ||
20510f2f JM |
768 | int security_quotactl(int cmds, int type, int id, struct super_block *sb) |
769 | { | |
f25fce3e | 770 | return call_int_hook(quotactl, 0, cmds, type, id, sb); |
20510f2f JM |
771 | } |
772 | ||
773 | int security_quota_on(struct dentry *dentry) | |
774 | { | |
f25fce3e | 775 | return call_int_hook(quota_on, 0, dentry); |
20510f2f JM |
776 | } |
777 | ||
12b3052c | 778 | int security_syslog(int type) |
20510f2f | 779 | { |
f25fce3e | 780 | return call_int_hook(syslog, 0, type); |
20510f2f JM |
781 | } |
782 | ||
457db29b | 783 | int security_settime64(const struct timespec64 *ts, const struct timezone *tz) |
20510f2f | 784 | { |
f25fce3e | 785 | return call_int_hook(settime, 0, ts, tz); |
20510f2f JM |
786 | } |
787 | ||
20510f2f JM |
788 | int security_vm_enough_memory_mm(struct mm_struct *mm, long pages) |
789 | { | |
b1d9e6b0 CS |
790 | struct security_hook_list *hp; |
791 | int cap_sys_admin = 1; | |
792 | int rc; | |
793 | ||
794 | /* | |
795 | * The module will respond with a positive value if | |
796 | * it thinks the __vm_enough_memory() call should be | |
797 | * made with the cap_sys_admin set. If all of the modules | |
798 | * agree that it should be set it will. If any module | |
799 | * thinks it should not be set it won't. | |
800 | */ | |
801 | list_for_each_entry(hp, &security_hook_heads.vm_enough_memory, list) { | |
802 | rc = hp->hook.vm_enough_memory(mm, pages); | |
803 | if (rc <= 0) { | |
804 | cap_sys_admin = 0; | |
805 | break; | |
806 | } | |
807 | } | |
808 | return __vm_enough_memory(mm, pages, cap_sys_admin); | |
20510f2f JM |
809 | } |
810 | ||
a6f76f23 | 811 | int security_bprm_set_creds(struct linux_binprm *bprm) |
20510f2f | 812 | { |
f25fce3e | 813 | return call_int_hook(bprm_set_creds, 0, bprm); |
20510f2f JM |
814 | } |
815 | ||
a6f76f23 | 816 | int security_bprm_check(struct linux_binprm *bprm) |
20510f2f | 817 | { |
6c21a7fb MZ |
818 | int ret; |
819 | ||
f25fce3e | 820 | ret = call_int_hook(bprm_check_security, 0, bprm); |
6c21a7fb MZ |
821 | if (ret) |
822 | return ret; | |
823 | return ima_bprm_check(bprm); | |
20510f2f JM |
824 | } |
825 | ||
a6f76f23 | 826 | void security_bprm_committing_creds(struct linux_binprm *bprm) |
20510f2f | 827 | { |
f25fce3e | 828 | call_void_hook(bprm_committing_creds, bprm); |
20510f2f JM |
829 | } |
830 | ||
a6f76f23 | 831 | void security_bprm_committed_creds(struct linux_binprm *bprm) |
20510f2f | 832 | { |
f25fce3e | 833 | call_void_hook(bprm_committed_creds, bprm); |
20510f2f JM |
834 | } |
835 | ||
836 | int security_bprm_secureexec(struct linux_binprm *bprm) | |
837 | { | |
f25fce3e | 838 | return call_int_hook(bprm_secureexec, 0, bprm); |
20510f2f JM |
839 | } |
840 | ||
841 | int security_sb_alloc(struct super_block *sb) | |
842 | { | |
ac8f82a0 CS |
843 | int rc = lsm_superblock_alloc(sb); |
844 | ||
845 | if (rc) | |
846 | return rc; | |
f25fce3e | 847 | return call_int_hook(sb_alloc_security, 0, sb); |
20510f2f JM |
848 | } |
849 | ||
850 | void security_sb_free(struct super_block *sb) | |
851 | { | |
f25fce3e | 852 | call_void_hook(sb_free_security, sb); |
ac8f82a0 CS |
853 | kfree(sb->s_security); |
854 | sb->s_security = NULL; | |
20510f2f JM |
855 | } |
856 | ||
e0007529 | 857 | int security_sb_copy_data(char *orig, char *copy) |
20510f2f | 858 | { |
f25fce3e | 859 | return call_int_hook(sb_copy_data, 0, orig, copy); |
20510f2f | 860 | } |
e0007529 | 861 | EXPORT_SYMBOL(security_sb_copy_data); |
20510f2f | 862 | |
ff36fe2c EP |
863 | int security_sb_remount(struct super_block *sb, void *data) |
864 | { | |
f25fce3e | 865 | return call_int_hook(sb_remount, 0, sb, data); |
ff36fe2c EP |
866 | } |
867 | ||
12204e24 | 868 | int security_sb_kern_mount(struct super_block *sb, int flags, void *data) |
20510f2f | 869 | { |
f25fce3e | 870 | return call_int_hook(sb_kern_mount, 0, sb, flags, data); |
20510f2f JM |
871 | } |
872 | ||
2069f457 EP |
873 | int security_sb_show_options(struct seq_file *m, struct super_block *sb) |
874 | { | |
f25fce3e | 875 | return call_int_hook(sb_show_options, 0, m, sb); |
2069f457 EP |
876 | } |
877 | ||
20510f2f JM |
878 | int security_sb_statfs(struct dentry *dentry) |
879 | { | |
f25fce3e | 880 | return call_int_hook(sb_statfs, 0, dentry); |
20510f2f JM |
881 | } |
882 | ||
8a04c43b | 883 | int security_sb_mount(const char *dev_name, const struct path *path, |
808d4e3c | 884 | const char *type, unsigned long flags, void *data) |
20510f2f | 885 | { |
f25fce3e | 886 | return call_int_hook(sb_mount, 0, dev_name, path, type, flags, data); |
20510f2f JM |
887 | } |
888 | ||
20510f2f JM |
889 | int security_sb_umount(struct vfsmount *mnt, int flags) |
890 | { | |
f25fce3e | 891 | return call_int_hook(sb_umount, 0, mnt, flags); |
20510f2f JM |
892 | } |
893 | ||
3b73b68c | 894 | int security_sb_pivotroot(const struct path *old_path, const struct path *new_path) |
20510f2f | 895 | { |
f25fce3e | 896 | return call_int_hook(sb_pivotroot, 0, old_path, new_path); |
20510f2f JM |
897 | } |
898 | ||
c9180a57 | 899 | int security_sb_set_mnt_opts(struct super_block *sb, |
649f6e77 DQ |
900 | struct security_mnt_opts *opts, |
901 | unsigned long kern_flags, | |
902 | unsigned long *set_kern_flags) | |
c9180a57 | 903 | { |
b1d9e6b0 CS |
904 | return call_int_hook(sb_set_mnt_opts, |
905 | opts->num_mnt_opts ? -EOPNOTSUPP : 0, sb, | |
906 | opts, kern_flags, set_kern_flags); | |
c9180a57 | 907 | } |
e0007529 | 908 | EXPORT_SYMBOL(security_sb_set_mnt_opts); |
c9180a57 | 909 | |
094f7b69 | 910 | int security_sb_clone_mnt_opts(const struct super_block *oldsb, |
0b4d3452 SM |
911 | struct super_block *newsb, |
912 | unsigned long kern_flags, | |
913 | unsigned long *set_kern_flags) | |
c9180a57 | 914 | { |
0b4d3452 SM |
915 | return call_int_hook(sb_clone_mnt_opts, 0, oldsb, newsb, |
916 | kern_flags, set_kern_flags); | |
c9180a57 | 917 | } |
e0007529 EP |
918 | EXPORT_SYMBOL(security_sb_clone_mnt_opts); |
919 | ||
920 | int security_sb_parse_opts_str(char *options, struct security_mnt_opts *opts) | |
921 | { | |
f25fce3e | 922 | return call_int_hook(sb_parse_opts_str, 0, options, opts); |
e0007529 EP |
923 | } |
924 | EXPORT_SYMBOL(security_sb_parse_opts_str); | |
c9180a57 | 925 | |
20510f2f JM |
926 | int security_inode_alloc(struct inode *inode) |
927 | { | |
ac8f82a0 CS |
928 | int rc = lsm_inode_alloc(inode); |
929 | ||
930 | if (rc) | |
931 | return rc; | |
f25fce3e | 932 | return call_int_hook(inode_alloc_security, 0, inode); |
20510f2f JM |
933 | } |
934 | ||
ac8f82a0 CS |
935 | static void inode_free_by_rcu(struct rcu_head *head) |
936 | { | |
937 | /* | |
938 | * The rcu head is at the start of the inode blob | |
939 | */ | |
940 | kfree(head); | |
941 | } | |
942 | ||
20510f2f JM |
943 | void security_inode_free(struct inode *inode) |
944 | { | |
f381c272 | 945 | integrity_inode_free(inode); |
f25fce3e | 946 | call_void_hook(inode_free_security, inode); |
ac8f82a0 CS |
947 | /* |
948 | * The inode may still be referenced in a path walk and | |
949 | * a call to security_inode_permission() can be made | |
950 | * after inode_free_security() is called. Ideally, the VFS | |
951 | * wouldn't do this, but fixing that is a much harder | |
952 | * job. For now, simply free the i_security via RCU, and | |
953 | * leave the current inode->i_security pointer intact. | |
954 | * The inode will be freed after the RCU grace period too. | |
955 | */ | |
956 | if (inode->i_security != NULL) { | |
957 | call_rcu((struct rcu_head *)inode->i_security, | |
958 | inode_free_by_rcu); | |
959 | inode->i_security = NULL; | |
960 | } | |
20510f2f JM |
961 | } |
962 | ||
d47be3df | 963 | int security_dentry_init_security(struct dentry *dentry, int mode, |
4f3ccd76 | 964 | const struct qstr *name, void **ctx, |
d47be3df DQ |
965 | u32 *ctxlen) |
966 | { | |
b1d9e6b0 CS |
967 | return call_int_hook(dentry_init_security, -EOPNOTSUPP, dentry, mode, |
968 | name, ctx, ctxlen); | |
d47be3df DQ |
969 | } |
970 | EXPORT_SYMBOL(security_dentry_init_security); | |
971 | ||
2602625b VG |
972 | int security_dentry_create_files_as(struct dentry *dentry, int mode, |
973 | struct qstr *name, | |
974 | const struct cred *old, struct cred *new) | |
975 | { | |
976 | return call_int_hook(dentry_create_files_as, 0, dentry, mode, | |
977 | name, old, new); | |
978 | } | |
979 | EXPORT_SYMBOL(security_dentry_create_files_as); | |
980 | ||
20510f2f | 981 | int security_inode_init_security(struct inode *inode, struct inode *dir, |
9d8f13ba MZ |
982 | const struct qstr *qstr, |
983 | const initxattrs initxattrs, void *fs_data) | |
20510f2f | 984 | { |
823eb1cc MZ |
985 | struct xattr new_xattrs[MAX_LSM_EVM_XATTR + 1]; |
986 | struct xattr *lsm_xattr, *evm_xattr, *xattr; | |
9d8f13ba MZ |
987 | int ret; |
988 | ||
20510f2f | 989 | if (unlikely(IS_PRIVATE(inode))) |
fb88c2b6 | 990 | return 0; |
9d8f13ba | 991 | |
9d8f13ba | 992 | if (!initxattrs) |
e308fd3b JB |
993 | return call_int_hook(inode_init_security, -EOPNOTSUPP, inode, |
994 | dir, qstr, NULL, NULL, NULL); | |
9548906b | 995 | memset(new_xattrs, 0, sizeof(new_xattrs)); |
9d8f13ba | 996 | lsm_xattr = new_xattrs; |
b1d9e6b0 | 997 | ret = call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir, qstr, |
9d8f13ba MZ |
998 | &lsm_xattr->name, |
999 | &lsm_xattr->value, | |
1000 | &lsm_xattr->value_len); | |
1001 | if (ret) | |
1002 | goto out; | |
823eb1cc MZ |
1003 | |
1004 | evm_xattr = lsm_xattr + 1; | |
1005 | ret = evm_inode_init_security(inode, lsm_xattr, evm_xattr); | |
1006 | if (ret) | |
1007 | goto out; | |
9d8f13ba MZ |
1008 | ret = initxattrs(inode, new_xattrs, fs_data); |
1009 | out: | |
9548906b | 1010 | for (xattr = new_xattrs; xattr->value != NULL; xattr++) |
823eb1cc | 1011 | kfree(xattr->value); |
9d8f13ba MZ |
1012 | return (ret == -EOPNOTSUPP) ? 0 : ret; |
1013 | } | |
1014 | EXPORT_SYMBOL(security_inode_init_security); | |
1015 | ||
1016 | int security_old_inode_init_security(struct inode *inode, struct inode *dir, | |
9548906b | 1017 | const struct qstr *qstr, const char **name, |
9d8f13ba | 1018 | void **value, size_t *len) |
20510f2f JM |
1019 | { |
1020 | if (unlikely(IS_PRIVATE(inode))) | |
30e05324 | 1021 | return -EOPNOTSUPP; |
e308fd3b JB |
1022 | return call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir, |
1023 | qstr, name, value, len); | |
20510f2f | 1024 | } |
9d8f13ba | 1025 | EXPORT_SYMBOL(security_old_inode_init_security); |
20510f2f | 1026 | |
be6d3e56 | 1027 | #ifdef CONFIG_SECURITY_PATH |
d3607752 | 1028 | int security_path_mknod(const struct path *dir, struct dentry *dentry, umode_t mode, |
be6d3e56 KT |
1029 | unsigned int dev) |
1030 | { | |
c6f493d6 | 1031 | if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) |
be6d3e56 | 1032 | return 0; |
f25fce3e | 1033 | return call_int_hook(path_mknod, 0, dir, dentry, mode, dev); |
be6d3e56 KT |
1034 | } |
1035 | EXPORT_SYMBOL(security_path_mknod); | |
1036 | ||
d3607752 | 1037 | int security_path_mkdir(const struct path *dir, struct dentry *dentry, umode_t mode) |
be6d3e56 | 1038 | { |
c6f493d6 | 1039 | if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) |
be6d3e56 | 1040 | return 0; |
f25fce3e | 1041 | return call_int_hook(path_mkdir, 0, dir, dentry, mode); |
be6d3e56 | 1042 | } |
82140443 | 1043 | EXPORT_SYMBOL(security_path_mkdir); |
be6d3e56 | 1044 | |
989f74e0 | 1045 | int security_path_rmdir(const struct path *dir, struct dentry *dentry) |
be6d3e56 | 1046 | { |
c6f493d6 | 1047 | if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) |
be6d3e56 | 1048 | return 0; |
f25fce3e | 1049 | return call_int_hook(path_rmdir, 0, dir, dentry); |
be6d3e56 | 1050 | } |
b6450630 | 1051 | EXPORT_SYMBOL_GPL(security_path_rmdir); |
be6d3e56 | 1052 | |
989f74e0 | 1053 | int security_path_unlink(const struct path *dir, struct dentry *dentry) |
be6d3e56 | 1054 | { |
c6f493d6 | 1055 | if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) |
be6d3e56 | 1056 | return 0; |
f25fce3e | 1057 | return call_int_hook(path_unlink, 0, dir, dentry); |
be6d3e56 | 1058 | } |
82140443 | 1059 | EXPORT_SYMBOL(security_path_unlink); |
be6d3e56 | 1060 | |
d3607752 | 1061 | int security_path_symlink(const struct path *dir, struct dentry *dentry, |
be6d3e56 KT |
1062 | const char *old_name) |
1063 | { | |
c6f493d6 | 1064 | if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) |
be6d3e56 | 1065 | return 0; |
f25fce3e | 1066 | return call_int_hook(path_symlink, 0, dir, dentry, old_name); |
be6d3e56 | 1067 | } |
b6450630 | 1068 | EXPORT_SYMBOL_GPL(security_path_symlink); |
be6d3e56 | 1069 | |
3ccee46a | 1070 | int security_path_link(struct dentry *old_dentry, const struct path *new_dir, |
be6d3e56 KT |
1071 | struct dentry *new_dentry) |
1072 | { | |
c6f493d6 | 1073 | if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)))) |
be6d3e56 | 1074 | return 0; |
f25fce3e | 1075 | return call_int_hook(path_link, 0, old_dentry, new_dir, new_dentry); |
be6d3e56 | 1076 | } |
b6450630 | 1077 | EXPORT_SYMBOL_GPL(security_path_link); |
be6d3e56 | 1078 | |
3ccee46a AV |
1079 | int security_path_rename(const struct path *old_dir, struct dentry *old_dentry, |
1080 | const struct path *new_dir, struct dentry *new_dentry, | |
0b3974eb | 1081 | unsigned int flags) |
be6d3e56 | 1082 | { |
c6f493d6 DH |
1083 | if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) || |
1084 | (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry))))) | |
be6d3e56 | 1085 | return 0; |
da1ce067 MS |
1086 | |
1087 | if (flags & RENAME_EXCHANGE) { | |
f25fce3e CS |
1088 | int err = call_int_hook(path_rename, 0, new_dir, new_dentry, |
1089 | old_dir, old_dentry); | |
da1ce067 MS |
1090 | if (err) |
1091 | return err; | |
1092 | } | |
1093 | ||
f25fce3e CS |
1094 | return call_int_hook(path_rename, 0, old_dir, old_dentry, new_dir, |
1095 | new_dentry); | |
be6d3e56 | 1096 | } |
82140443 | 1097 | EXPORT_SYMBOL(security_path_rename); |
be6d3e56 | 1098 | |
81f4c506 | 1099 | int security_path_truncate(const struct path *path) |
be6d3e56 | 1100 | { |
c6f493d6 | 1101 | if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) |
be6d3e56 | 1102 | return 0; |
f25fce3e | 1103 | return call_int_hook(path_truncate, 0, path); |
be6d3e56 | 1104 | } |
b6450630 | 1105 | EXPORT_SYMBOL_GPL(security_path_truncate); |
89eda068 | 1106 | |
be01f9f2 | 1107 | int security_path_chmod(const struct path *path, umode_t mode) |
89eda068 | 1108 | { |
c6f493d6 | 1109 | if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) |
89eda068 | 1110 | return 0; |
f25fce3e | 1111 | return call_int_hook(path_chmod, 0, path, mode); |
89eda068 | 1112 | } |
b6450630 | 1113 | EXPORT_SYMBOL_GPL(security_path_chmod); |
89eda068 | 1114 | |
7fd25dac | 1115 | int security_path_chown(const struct path *path, kuid_t uid, kgid_t gid) |
89eda068 | 1116 | { |
c6f493d6 | 1117 | if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) |
89eda068 | 1118 | return 0; |
f25fce3e | 1119 | return call_int_hook(path_chown, 0, path, uid, gid); |
89eda068 | 1120 | } |
b6450630 | 1121 | EXPORT_SYMBOL_GPL(security_path_chown); |
8b8efb44 | 1122 | |
77b286c0 | 1123 | int security_path_chroot(const struct path *path) |
8b8efb44 | 1124 | { |
f25fce3e | 1125 | return call_int_hook(path_chroot, 0, path); |
8b8efb44 | 1126 | } |
be6d3e56 KT |
1127 | #endif |
1128 | ||
4acdaf27 | 1129 | int security_inode_create(struct inode *dir, struct dentry *dentry, umode_t mode) |
20510f2f JM |
1130 | { |
1131 | if (unlikely(IS_PRIVATE(dir))) | |
1132 | return 0; | |
f25fce3e | 1133 | return call_int_hook(inode_create, 0, dir, dentry, mode); |
20510f2f | 1134 | } |
800a9647 | 1135 | EXPORT_SYMBOL_GPL(security_inode_create); |
20510f2f JM |
1136 | |
1137 | int security_inode_link(struct dentry *old_dentry, struct inode *dir, | |
1138 | struct dentry *new_dentry) | |
1139 | { | |
c6f493d6 | 1140 | if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)))) |
20510f2f | 1141 | return 0; |
f25fce3e | 1142 | return call_int_hook(inode_link, 0, old_dentry, dir, new_dentry); |
20510f2f JM |
1143 | } |
1144 | ||
1145 | int security_inode_unlink(struct inode *dir, struct dentry *dentry) | |
1146 | { | |
c6f493d6 | 1147 | if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) |
20510f2f | 1148 | return 0; |
f25fce3e | 1149 | return call_int_hook(inode_unlink, 0, dir, dentry); |
20510f2f JM |
1150 | } |
1151 | ||
1152 | int security_inode_symlink(struct inode *dir, struct dentry *dentry, | |
1153 | const char *old_name) | |
1154 | { | |
1155 | if (unlikely(IS_PRIVATE(dir))) | |
1156 | return 0; | |
f25fce3e | 1157 | return call_int_hook(inode_symlink, 0, dir, dentry, old_name); |
20510f2f JM |
1158 | } |
1159 | ||
18bb1db3 | 1160 | int security_inode_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
20510f2f JM |
1161 | { |
1162 | if (unlikely(IS_PRIVATE(dir))) | |
1163 | return 0; | |
f25fce3e | 1164 | return call_int_hook(inode_mkdir, 0, dir, dentry, mode); |
20510f2f | 1165 | } |
800a9647 | 1166 | EXPORT_SYMBOL_GPL(security_inode_mkdir); |
20510f2f JM |
1167 | |
1168 | int security_inode_rmdir(struct inode *dir, struct dentry *dentry) | |
1169 | { | |
c6f493d6 | 1170 | if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) |
20510f2f | 1171 | return 0; |
f25fce3e | 1172 | return call_int_hook(inode_rmdir, 0, dir, dentry); |
20510f2f JM |
1173 | } |
1174 | ||
1a67aafb | 1175 | int security_inode_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev) |
20510f2f JM |
1176 | { |
1177 | if (unlikely(IS_PRIVATE(dir))) | |
1178 | return 0; | |
f25fce3e | 1179 | return call_int_hook(inode_mknod, 0, dir, dentry, mode, dev); |
20510f2f JM |
1180 | } |
1181 | ||
1182 | int security_inode_rename(struct inode *old_dir, struct dentry *old_dentry, | |
0b3974eb MS |
1183 | struct inode *new_dir, struct dentry *new_dentry, |
1184 | unsigned int flags) | |
20510f2f | 1185 | { |
c6f493d6 DH |
1186 | if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) || |
1187 | (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry))))) | |
20510f2f | 1188 | return 0; |
da1ce067 MS |
1189 | |
1190 | if (flags & RENAME_EXCHANGE) { | |
f25fce3e | 1191 | int err = call_int_hook(inode_rename, 0, new_dir, new_dentry, |
da1ce067 MS |
1192 | old_dir, old_dentry); |
1193 | if (err) | |
1194 | return err; | |
1195 | } | |
1196 | ||
f25fce3e | 1197 | return call_int_hook(inode_rename, 0, old_dir, old_dentry, |
20510f2f JM |
1198 | new_dir, new_dentry); |
1199 | } | |
1200 | ||
1201 | int security_inode_readlink(struct dentry *dentry) | |
1202 | { | |
c6f493d6 | 1203 | if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) |
20510f2f | 1204 | return 0; |
f25fce3e | 1205 | return call_int_hook(inode_readlink, 0, dentry); |
20510f2f | 1206 | } |
b6450630 | 1207 | EXPORT_SYMBOL_GPL(security_inode_readlink); |
20510f2f | 1208 | |
bda0be7a N |
1209 | int security_inode_follow_link(struct dentry *dentry, struct inode *inode, |
1210 | bool rcu) | |
20510f2f | 1211 | { |
bda0be7a | 1212 | if (unlikely(IS_PRIVATE(inode))) |
20510f2f | 1213 | return 0; |
e22619a2 | 1214 | return call_int_hook(inode_follow_link, 0, dentry, inode, rcu); |
20510f2f JM |
1215 | } |
1216 | ||
b77b0646 | 1217 | int security_inode_permission(struct inode *inode, int mask) |
20510f2f JM |
1218 | { |
1219 | if (unlikely(IS_PRIVATE(inode))) | |
1220 | return 0; | |
f25fce3e | 1221 | return call_int_hook(inode_permission, 0, inode, mask); |
20510f2f | 1222 | } |
b6450630 | 1223 | EXPORT_SYMBOL_GPL(security_inode_permission); |
20510f2f JM |
1224 | |
1225 | int security_inode_setattr(struct dentry *dentry, struct iattr *attr) | |
1226 | { | |
817b54aa MZ |
1227 | int ret; |
1228 | ||
c6f493d6 | 1229 | if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) |
20510f2f | 1230 | return 0; |
f25fce3e | 1231 | ret = call_int_hook(inode_setattr, 0, dentry, attr); |
817b54aa MZ |
1232 | if (ret) |
1233 | return ret; | |
1234 | return evm_inode_setattr(dentry, attr); | |
20510f2f | 1235 | } |
b1da47e2 | 1236 | EXPORT_SYMBOL_GPL(security_inode_setattr); |
20510f2f | 1237 | |
3f7036a0 | 1238 | int security_inode_getattr(const struct path *path) |
20510f2f | 1239 | { |
c6f493d6 | 1240 | if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) |
20510f2f | 1241 | return 0; |
f25fce3e | 1242 | return call_int_hook(inode_getattr, 0, path); |
20510f2f JM |
1243 | } |
1244 | ||
8f0cfa52 DH |
1245 | int security_inode_setxattr(struct dentry *dentry, const char *name, |
1246 | const void *value, size_t size, int flags) | |
20510f2f | 1247 | { |
3e1be52d MZ |
1248 | int ret; |
1249 | ||
c6f493d6 | 1250 | if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) |
20510f2f | 1251 | return 0; |
b1d9e6b0 CS |
1252 | /* |
1253 | * SELinux and Smack integrate the cap call, | |
1254 | * so assume that all LSMs supplying this call do so. | |
1255 | */ | |
1256 | ret = call_int_hook(inode_setxattr, 1, dentry, name, value, size, | |
f25fce3e | 1257 | flags); |
b1d9e6b0 CS |
1258 | |
1259 | if (ret == 1) | |
1260 | ret = cap_inode_setxattr(dentry, name, value, size, flags); | |
42c63330 MZ |
1261 | if (ret) |
1262 | return ret; | |
1263 | ret = ima_inode_setxattr(dentry, name, value, size); | |
3e1be52d MZ |
1264 | if (ret) |
1265 | return ret; | |
1266 | return evm_inode_setxattr(dentry, name, value, size); | |
20510f2f JM |
1267 | } |
1268 | ||
8f0cfa52 DH |
1269 | void security_inode_post_setxattr(struct dentry *dentry, const char *name, |
1270 | const void *value, size_t size, int flags) | |
20510f2f | 1271 | { |
c6f493d6 | 1272 | if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) |
20510f2f | 1273 | return; |
f25fce3e | 1274 | call_void_hook(inode_post_setxattr, dentry, name, value, size, flags); |
3e1be52d | 1275 | evm_inode_post_setxattr(dentry, name, value, size); |
20510f2f JM |
1276 | } |
1277 | ||
8f0cfa52 | 1278 | int security_inode_getxattr(struct dentry *dentry, const char *name) |
20510f2f | 1279 | { |
c6f493d6 | 1280 | if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) |
20510f2f | 1281 | return 0; |
f25fce3e | 1282 | return call_int_hook(inode_getxattr, 0, dentry, name); |
20510f2f JM |
1283 | } |
1284 | ||
1285 | int security_inode_listxattr(struct dentry *dentry) | |
1286 | { | |
c6f493d6 | 1287 | if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) |
20510f2f | 1288 | return 0; |
f25fce3e | 1289 | return call_int_hook(inode_listxattr, 0, dentry); |
20510f2f JM |
1290 | } |
1291 | ||
8f0cfa52 | 1292 | int security_inode_removexattr(struct dentry *dentry, const char *name) |
20510f2f | 1293 | { |
3e1be52d MZ |
1294 | int ret; |
1295 | ||
c6f493d6 | 1296 | if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) |
20510f2f | 1297 | return 0; |
b1d9e6b0 CS |
1298 | /* |
1299 | * SELinux and Smack integrate the cap call, | |
1300 | * so assume that all LSMs supplying this call do so. | |
1301 | */ | |
1302 | ret = call_int_hook(inode_removexattr, 1, dentry, name); | |
1303 | if (ret == 1) | |
1304 | ret = cap_inode_removexattr(dentry, name); | |
42c63330 MZ |
1305 | if (ret) |
1306 | return ret; | |
1307 | ret = ima_inode_removexattr(dentry, name); | |
3e1be52d MZ |
1308 | if (ret) |
1309 | return ret; | |
1310 | return evm_inode_removexattr(dentry, name); | |
20510f2f JM |
1311 | } |
1312 | ||
b5376771 SH |
1313 | int security_inode_need_killpriv(struct dentry *dentry) |
1314 | { | |
f25fce3e | 1315 | return call_int_hook(inode_need_killpriv, 0, dentry); |
b5376771 SH |
1316 | } |
1317 | ||
1318 | int security_inode_killpriv(struct dentry *dentry) | |
1319 | { | |
f25fce3e | 1320 | return call_int_hook(inode_killpriv, 0, dentry); |
b5376771 SH |
1321 | } |
1322 | ||
ea861dfd | 1323 | int security_inode_getsecurity(struct inode *inode, const char *name, void **buffer, bool alloc) |
20510f2f | 1324 | { |
2885c1e3 CS |
1325 | struct security_hook_list *hp; |
1326 | int rc; | |
1327 | ||
20510f2f | 1328 | if (unlikely(IS_PRIVATE(inode))) |
8d952504 | 1329 | return -EOPNOTSUPP; |
2885c1e3 CS |
1330 | /* |
1331 | * Only one module will provide an attribute with a given name. | |
1332 | */ | |
1333 | list_for_each_entry(hp, &security_hook_heads.inode_getsecurity, list) { | |
1334 | rc = hp->hook.inode_getsecurity(inode, name, buffer, alloc); | |
1335 | if (rc != -EOPNOTSUPP) | |
1336 | return rc; | |
1337 | } | |
1338 | return -EOPNOTSUPP; | |
20510f2f JM |
1339 | } |
1340 | ||
1341 | int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags) | |
1342 | { | |
2885c1e3 CS |
1343 | struct security_hook_list *hp; |
1344 | int rc; | |
1345 | ||
20510f2f | 1346 | if (unlikely(IS_PRIVATE(inode))) |
8d952504 | 1347 | return -EOPNOTSUPP; |
2885c1e3 CS |
1348 | /* |
1349 | * Only one module will provide an attribute with a given name. | |
1350 | */ | |
1351 | list_for_each_entry(hp, &security_hook_heads.inode_setsecurity, list) { | |
1352 | rc = hp->hook.inode_setsecurity(inode, name, value, size, | |
1353 | flags); | |
1354 | if (rc != -EOPNOTSUPP) | |
1355 | return rc; | |
1356 | } | |
1357 | return -EOPNOTSUPP; | |
20510f2f JM |
1358 | } |
1359 | ||
1360 | int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size) | |
1361 | { | |
1362 | if (unlikely(IS_PRIVATE(inode))) | |
1363 | return 0; | |
f25fce3e | 1364 | return call_int_hook(inode_listsecurity, 0, inode, buffer, buffer_size); |
20510f2f | 1365 | } |
c9bccef6 | 1366 | EXPORT_SYMBOL(security_inode_listsecurity); |
20510f2f | 1367 | |
d6335d77 | 1368 | void security_inode_getsecid(struct inode *inode, u32 *secid) |
8a076191 | 1369 | { |
f25fce3e | 1370 | call_void_hook(inode_getsecid, inode, secid); |
8a076191 AD |
1371 | } |
1372 | ||
d8ad8b49 VG |
1373 | int security_inode_copy_up(struct dentry *src, struct cred **new) |
1374 | { | |
1375 | return call_int_hook(inode_copy_up, 0, src, new); | |
1376 | } | |
1377 | EXPORT_SYMBOL(security_inode_copy_up); | |
1378 | ||
121ab822 VG |
1379 | int security_inode_copy_up_xattr(const char *name) |
1380 | { | |
1381 | return call_int_hook(inode_copy_up_xattr, -EOPNOTSUPP, name); | |
1382 | } | |
1383 | EXPORT_SYMBOL(security_inode_copy_up_xattr); | |
1384 | ||
20510f2f JM |
1385 | int security_file_permission(struct file *file, int mask) |
1386 | { | |
c4ec54b4 EP |
1387 | int ret; |
1388 | ||
f25fce3e | 1389 | ret = call_int_hook(file_permission, 0, file, mask); |
c4ec54b4 EP |
1390 | if (ret) |
1391 | return ret; | |
1392 | ||
1393 | return fsnotify_perm(file, mask); | |
20510f2f | 1394 | } |
b6450630 | 1395 | EXPORT_SYMBOL_GPL(security_file_permission); |
20510f2f JM |
1396 | |
1397 | int security_file_alloc(struct file *file) | |
1398 | { | |
004c5200 CS |
1399 | int rc = lsm_file_alloc(file); |
1400 | ||
1401 | if (rc) | |
1402 | return rc; | |
f25fce3e | 1403 | return call_int_hook(file_alloc_security, 0, file); |
20510f2f JM |
1404 | } |
1405 | ||
1406 | void security_file_free(struct file *file) | |
1407 | { | |
f25fce3e | 1408 | call_void_hook(file_free_security, file); |
004c5200 CS |
1409 | |
1410 | kfree(file->f_security); | |
1411 | file->f_security = NULL; | |
20510f2f JM |
1412 | } |
1413 | ||
1414 | int security_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
1415 | { | |
f25fce3e | 1416 | return call_int_hook(file_ioctl, 0, file, cmd, arg); |
20510f2f JM |
1417 | } |
1418 | ||
98de59bf | 1419 | static inline unsigned long mmap_prot(struct file *file, unsigned long prot) |
20510f2f | 1420 | { |
8b3ec681 | 1421 | /* |
98de59bf AV |
1422 | * Does we have PROT_READ and does the application expect |
1423 | * it to imply PROT_EXEC? If not, nothing to talk about... | |
8b3ec681 | 1424 | */ |
98de59bf AV |
1425 | if ((prot & (PROT_READ | PROT_EXEC)) != PROT_READ) |
1426 | return prot; | |
8b3ec681 | 1427 | if (!(current->personality & READ_IMPLIES_EXEC)) |
98de59bf AV |
1428 | return prot; |
1429 | /* | |
1430 | * if that's an anonymous mapping, let it. | |
1431 | */ | |
1432 | if (!file) | |
1433 | return prot | PROT_EXEC; | |
1434 | /* | |
1435 | * ditto if it's not on noexec mount, except that on !MMU we need | |
b4caecd4 | 1436 | * NOMMU_MAP_EXEC (== VM_MAYEXEC) in this case |
98de59bf | 1437 | */ |
90f8572b | 1438 | if (!path_noexec(&file->f_path)) { |
8b3ec681 | 1439 | #ifndef CONFIG_MMU |
b4caecd4 CH |
1440 | if (file->f_op->mmap_capabilities) { |
1441 | unsigned caps = file->f_op->mmap_capabilities(file); | |
1442 | if (!(caps & NOMMU_MAP_EXEC)) | |
1443 | return prot; | |
1444 | } | |
8b3ec681 | 1445 | #endif |
98de59bf | 1446 | return prot | PROT_EXEC; |
8b3ec681 | 1447 | } |
98de59bf AV |
1448 | /* anything on noexec mount won't get PROT_EXEC */ |
1449 | return prot; | |
1450 | } | |
1451 | ||
1452 | int security_mmap_file(struct file *file, unsigned long prot, | |
1453 | unsigned long flags) | |
1454 | { | |
1455 | int ret; | |
f25fce3e | 1456 | ret = call_int_hook(mmap_file, 0, file, prot, |
98de59bf | 1457 | mmap_prot(file, prot), flags); |
6c21a7fb MZ |
1458 | if (ret) |
1459 | return ret; | |
1460 | return ima_file_mmap(file, prot); | |
20510f2f | 1461 | } |
b6450630 | 1462 | EXPORT_SYMBOL_GPL(security_mmap_file); |
20510f2f | 1463 | |
e5467859 AV |
1464 | int security_mmap_addr(unsigned long addr) |
1465 | { | |
f25fce3e | 1466 | return call_int_hook(mmap_addr, 0, addr); |
e5467859 AV |
1467 | } |
1468 | ||
20510f2f JM |
1469 | int security_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot, |
1470 | unsigned long prot) | |
1471 | { | |
f25fce3e | 1472 | return call_int_hook(file_mprotect, 0, vma, reqprot, prot); |
20510f2f JM |
1473 | } |
1474 | ||
1475 | int security_file_lock(struct file *file, unsigned int cmd) | |
1476 | { | |
f25fce3e | 1477 | return call_int_hook(file_lock, 0, file, cmd); |
20510f2f JM |
1478 | } |
1479 | ||
1480 | int security_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg) | |
1481 | { | |
f25fce3e | 1482 | return call_int_hook(file_fcntl, 0, file, cmd, arg); |
20510f2f JM |
1483 | } |
1484 | ||
e0b93edd | 1485 | void security_file_set_fowner(struct file *file) |
20510f2f | 1486 | { |
f25fce3e | 1487 | call_void_hook(file_set_fowner, file); |
20510f2f JM |
1488 | } |
1489 | ||
1490 | int security_file_send_sigiotask(struct task_struct *tsk, | |
1491 | struct fown_struct *fown, int sig) | |
1492 | { | |
f25fce3e | 1493 | return call_int_hook(file_send_sigiotask, 0, tsk, fown, sig); |
20510f2f JM |
1494 | } |
1495 | ||
1496 | int security_file_receive(struct file *file) | |
1497 | { | |
f25fce3e | 1498 | return call_int_hook(file_receive, 0, file); |
20510f2f JM |
1499 | } |
1500 | ||
83d49856 | 1501 | int security_file_open(struct file *file, const struct cred *cred) |
20510f2f | 1502 | { |
c4ec54b4 EP |
1503 | int ret; |
1504 | ||
f25fce3e | 1505 | ret = call_int_hook(file_open, 0, file, cred); |
c4ec54b4 EP |
1506 | if (ret) |
1507 | return ret; | |
1508 | ||
1509 | return fsnotify_perm(file, MAY_OPEN); | |
20510f2f JM |
1510 | } |
1511 | ||
1512 | int security_task_create(unsigned long clone_flags) | |
1513 | { | |
f25fce3e | 1514 | return call_int_hook(task_create, 0, clone_flags); |
20510f2f JM |
1515 | } |
1516 | ||
e4e55b47 TH |
1517 | int security_task_alloc(struct task_struct *task, unsigned long clone_flags) |
1518 | { | |
44559d36 CS |
1519 | int rc = lsm_task_alloc(task); |
1520 | ||
1521 | if (rc) | |
1522 | return rc; | |
e4e55b47 TH |
1523 | return call_int_hook(task_alloc, 0, task, clone_flags); |
1524 | } | |
1525 | ||
1a2a4d06 KC |
1526 | void security_task_free(struct task_struct *task) |
1527 | { | |
f25fce3e | 1528 | call_void_hook(task_free, task); |
edcfdebc CS |
1529 | |
1530 | kfree(task->security); | |
1531 | task->security = NULL; | |
1a2a4d06 KC |
1532 | } |
1533 | ||
ee18d64c DH |
1534 | int security_cred_alloc_blank(struct cred *cred, gfp_t gfp) |
1535 | { | |
98738d70 CS |
1536 | int rc = lsm_cred_alloc(cred, gfp); |
1537 | ||
1538 | if (rc) | |
1539 | return rc; | |
1540 | ||
f25fce3e | 1541 | return call_int_hook(cred_alloc_blank, 0, cred, gfp); |
ee18d64c DH |
1542 | } |
1543 | ||
d84f4f99 | 1544 | void security_cred_free(struct cred *cred) |
20510f2f | 1545 | { |
f25fce3e | 1546 | call_void_hook(cred_free, cred); |
98738d70 CS |
1547 | |
1548 | kfree(cred->security); | |
1549 | cred->security = NULL; | |
20510f2f JM |
1550 | } |
1551 | ||
d84f4f99 | 1552 | int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp) |
20510f2f | 1553 | { |
98738d70 CS |
1554 | int rc = lsm_cred_alloc(new, gfp); |
1555 | ||
1556 | if (rc) | |
1557 | return rc; | |
1558 | ||
f25fce3e | 1559 | return call_int_hook(cred_prepare, 0, new, old, gfp); |
d84f4f99 DH |
1560 | } |
1561 | ||
ee18d64c DH |
1562 | void security_transfer_creds(struct cred *new, const struct cred *old) |
1563 | { | |
f25fce3e | 1564 | call_void_hook(cred_transfer, new, old); |
ee18d64c DH |
1565 | } |
1566 | ||
3a3b7ce9 DH |
1567 | int security_kernel_act_as(struct cred *new, u32 secid) |
1568 | { | |
f25fce3e | 1569 | return call_int_hook(kernel_act_as, 0, new, secid); |
3a3b7ce9 DH |
1570 | } |
1571 | ||
1572 | int security_kernel_create_files_as(struct cred *new, struct inode *inode) | |
1573 | { | |
f25fce3e | 1574 | return call_int_hook(kernel_create_files_as, 0, new, inode); |
3a3b7ce9 DH |
1575 | } |
1576 | ||
dd8dbf2e | 1577 | int security_kernel_module_request(char *kmod_name) |
9188499c | 1578 | { |
f25fce3e | 1579 | return call_int_hook(kernel_module_request, 0, kmod_name); |
9188499c EP |
1580 | } |
1581 | ||
39eeb4fb MZ |
1582 | int security_kernel_read_file(struct file *file, enum kernel_read_file_id id) |
1583 | { | |
1584 | int ret; | |
1585 | ||
1586 | ret = call_int_hook(kernel_read_file, 0, file, id); | |
1587 | if (ret) | |
1588 | return ret; | |
1589 | return ima_read_file(file, id); | |
1590 | } | |
1591 | EXPORT_SYMBOL_GPL(security_kernel_read_file); | |
1592 | ||
bc8ca5b9 MZ |
1593 | int security_kernel_post_read_file(struct file *file, char *buf, loff_t size, |
1594 | enum kernel_read_file_id id) | |
b44a7dfc | 1595 | { |
cf222217 MZ |
1596 | int ret; |
1597 | ||
1598 | ret = call_int_hook(kernel_post_read_file, 0, file, buf, size, id); | |
1599 | if (ret) | |
1600 | return ret; | |
1601 | return ima_post_read_file(file, buf, size, id); | |
b44a7dfc MZ |
1602 | } |
1603 | EXPORT_SYMBOL_GPL(security_kernel_post_read_file); | |
1604 | ||
d84f4f99 DH |
1605 | int security_task_fix_setuid(struct cred *new, const struct cred *old, |
1606 | int flags) | |
20510f2f | 1607 | { |
f25fce3e | 1608 | return call_int_hook(task_fix_setuid, 0, new, old, flags); |
20510f2f JM |
1609 | } |
1610 | ||
20510f2f JM |
1611 | int security_task_setpgid(struct task_struct *p, pid_t pgid) |
1612 | { | |
f25fce3e | 1613 | return call_int_hook(task_setpgid, 0, p, pgid); |
20510f2f JM |
1614 | } |
1615 | ||
1616 | int security_task_getpgid(struct task_struct *p) | |
1617 | { | |
f25fce3e | 1618 | return call_int_hook(task_getpgid, 0, p); |
20510f2f JM |
1619 | } |
1620 | ||
1621 | int security_task_getsid(struct task_struct *p) | |
1622 | { | |
f25fce3e | 1623 | return call_int_hook(task_getsid, 0, p); |
20510f2f JM |
1624 | } |
1625 | ||
1626 | void security_task_getsecid(struct task_struct *p, u32 *secid) | |
1627 | { | |
b1d9e6b0 | 1628 | *secid = 0; |
f25fce3e | 1629 | call_void_hook(task_getsecid, p, secid); |
20510f2f JM |
1630 | } |
1631 | EXPORT_SYMBOL(security_task_getsecid); | |
1632 | ||
20510f2f JM |
1633 | int security_task_setnice(struct task_struct *p, int nice) |
1634 | { | |
f25fce3e | 1635 | return call_int_hook(task_setnice, 0, p, nice); |
20510f2f JM |
1636 | } |
1637 | ||
1638 | int security_task_setioprio(struct task_struct *p, int ioprio) | |
1639 | { | |
f25fce3e | 1640 | return call_int_hook(task_setioprio, 0, p, ioprio); |
20510f2f JM |
1641 | } |
1642 | ||
1643 | int security_task_getioprio(struct task_struct *p) | |
1644 | { | |
f25fce3e | 1645 | return call_int_hook(task_getioprio, 0, p); |
20510f2f JM |
1646 | } |
1647 | ||
791ec491 SS |
1648 | int security_task_prlimit(const struct cred *cred, const struct cred *tcred, |
1649 | unsigned int flags) | |
1650 | { | |
1651 | return call_int_hook(task_prlimit, 0, cred, tcred, flags); | |
1652 | } | |
1653 | ||
8fd00b4d JS |
1654 | int security_task_setrlimit(struct task_struct *p, unsigned int resource, |
1655 | struct rlimit *new_rlim) | |
20510f2f | 1656 | { |
f25fce3e | 1657 | return call_int_hook(task_setrlimit, 0, p, resource, new_rlim); |
20510f2f JM |
1658 | } |
1659 | ||
b0ae1981 | 1660 | int security_task_setscheduler(struct task_struct *p) |
20510f2f | 1661 | { |
f25fce3e | 1662 | return call_int_hook(task_setscheduler, 0, p); |
20510f2f JM |
1663 | } |
1664 | ||
1665 | int security_task_getscheduler(struct task_struct *p) | |
1666 | { | |
f25fce3e | 1667 | return call_int_hook(task_getscheduler, 0, p); |
20510f2f JM |
1668 | } |
1669 | ||
1670 | int security_task_movememory(struct task_struct *p) | |
1671 | { | |
f25fce3e | 1672 | return call_int_hook(task_movememory, 0, p); |
20510f2f JM |
1673 | } |
1674 | ||
1675 | int security_task_kill(struct task_struct *p, struct siginfo *info, | |
1676 | int sig, u32 secid) | |
1677 | { | |
f25fce3e | 1678 | return call_int_hook(task_kill, 0, p, info, sig, secid); |
20510f2f JM |
1679 | } |
1680 | ||
ab5e2f3f JJ |
1681 | #ifdef CONFIG_SECURITY_STACKING |
1682 | static char *nolsm = "-default"; | |
1683 | #define NOLSMLEN 9 | |
1684 | ||
281260ac JJ |
1685 | static bool is_registered_lsm(const char *str, size_t size) |
1686 | { | |
1687 | struct security_hook_list *hp; | |
1688 | ||
1689 | list_for_each_entry(hp, &security_hook_heads.getprocattr, list) { | |
1690 | if (size == strlen(hp->lsm) && !strncmp(str, hp->lsm, size)) | |
1691 | return true; | |
1692 | } | |
1693 | ||
1694 | return false; | |
1695 | } | |
1696 | ||
1697 | static bool set_lsm_of_current(const char *str, size_t size) | |
1698 | { | |
1699 | char *lsm = lsm_of_task(current); | |
1700 | ||
1701 | if (is_registered_lsm(str, size)) { | |
1702 | strncpy(lsm, str, size); | |
1703 | lsm[size] = '\0'; | |
1704 | } else if (size == NOLSMLEN && !strncmp(str, nolsm, size)) { | |
1705 | lsm[0] = '\0'; | |
1706 | } else { | |
1707 | return false; | |
1708 | } | |
1709 | return true; | |
1710 | } | |
1711 | ||
ab5e2f3f JJ |
1712 | static int lsm_task_prctl(int option, unsigned long arg2, unsigned long arg3, |
1713 | unsigned long arg4, unsigned long arg5) | |
1714 | { | |
1715 | char *lsm = lsm_of_task(current); | |
1716 | char buffer[SECURITY_NAME_MAX + 1]; | |
1717 | __user char *optval = (__user char *)arg2; | |
1718 | __user int *optlen = (__user int *)arg3; | |
1719 | int dlen; | |
1720 | int len; | |
1721 | ||
1722 | switch (option) { | |
1723 | case PR_GET_DISPLAY_LSM: | |
1724 | len = arg4; | |
1725 | if (lsm[0] == '\0') { | |
1726 | lsm = nolsm; | |
1727 | dlen = NOLSMLEN; | |
1728 | } else | |
1729 | dlen = strlen(lsm) + 1; | |
1730 | if (dlen > len) | |
1731 | return -ERANGE; | |
1732 | if (copy_to_user(optval, lsm, dlen)) | |
1733 | return -EFAULT; | |
1734 | if (put_user(dlen, optlen)) | |
1735 | return -EFAULT; | |
1736 | break; | |
1737 | case PR_SET_DISPLAY_LSM: | |
1738 | len = arg3; | |
1739 | if (len > SECURITY_NAME_MAX) | |
1740 | return -EINVAL; | |
1741 | if (copy_from_user(buffer, optval, len)) | |
1742 | return -EFAULT; | |
1743 | buffer[len] = '\0'; | |
4ea81591 | 1744 | /* verify the requested LSM is registered */ |
281260ac | 1745 | if (!set_lsm_of_current(buffer, len)) |
4ea81591 | 1746 | return -ENOENT; |
ab5e2f3f JJ |
1747 | break; |
1748 | default: | |
1749 | return -ENOSYS; | |
1750 | } | |
1751 | return 0; | |
1752 | } | |
1753 | #endif | |
1754 | ||
20510f2f | 1755 | int security_task_prctl(int option, unsigned long arg2, unsigned long arg3, |
d84f4f99 | 1756 | unsigned long arg4, unsigned long arg5) |
20510f2f | 1757 | { |
b1d9e6b0 CS |
1758 | int thisrc; |
1759 | int rc = -ENOSYS; | |
1760 | struct security_hook_list *hp; | |
1761 | ||
ab5e2f3f JJ |
1762 | #ifdef CONFIG_SECURITY_STACKING |
1763 | rc = lsm_task_prctl(option, arg2, arg3, arg4, arg5); | |
1764 | if (rc != -ENOSYS) | |
1765 | return rc; | |
1766 | #endif | |
1767 | ||
b1d9e6b0 CS |
1768 | list_for_each_entry(hp, &security_hook_heads.task_prctl, list) { |
1769 | thisrc = hp->hook.task_prctl(option, arg2, arg3, arg4, arg5); | |
1770 | if (thisrc != -ENOSYS) { | |
1771 | rc = thisrc; | |
1772 | if (thisrc != 0) | |
1773 | break; | |
1774 | } | |
1775 | } | |
1776 | return rc; | |
20510f2f JM |
1777 | } |
1778 | ||
1779 | void security_task_to_inode(struct task_struct *p, struct inode *inode) | |
1780 | { | |
f25fce3e | 1781 | call_void_hook(task_to_inode, p, inode); |
20510f2f JM |
1782 | } |
1783 | ||
1784 | int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag) | |
1785 | { | |
f25fce3e | 1786 | return call_int_hook(ipc_permission, 0, ipcp, flag); |
20510f2f JM |
1787 | } |
1788 | ||
8a076191 AD |
1789 | void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid) |
1790 | { | |
b1d9e6b0 | 1791 | *secid = 0; |
f25fce3e | 1792 | call_void_hook(ipc_getsecid, ipcp, secid); |
8a076191 AD |
1793 | } |
1794 | ||
20510f2f JM |
1795 | int security_msg_msg_alloc(struct msg_msg *msg) |
1796 | { | |
ac8f82a0 CS |
1797 | int rc = lsm_msg_msg_alloc(msg); |
1798 | ||
1799 | if (rc) | |
1800 | return rc; | |
f25fce3e | 1801 | return call_int_hook(msg_msg_alloc_security, 0, msg); |
20510f2f JM |
1802 | } |
1803 | ||
1804 | void security_msg_msg_free(struct msg_msg *msg) | |
1805 | { | |
f25fce3e | 1806 | call_void_hook(msg_msg_free_security, msg); |
ac8f82a0 CS |
1807 | kfree(msg->security); |
1808 | msg->security = NULL; | |
20510f2f JM |
1809 | } |
1810 | ||
1811 | int security_msg_queue_alloc(struct msg_queue *msq) | |
1812 | { | |
ac8f82a0 CS |
1813 | int rc = lsm_ipc_alloc(&msq->q_perm); |
1814 | ||
1815 | if (rc) | |
1816 | return rc; | |
f25fce3e | 1817 | return call_int_hook(msg_queue_alloc_security, 0, msq); |
20510f2f JM |
1818 | } |
1819 | ||
1820 | void security_msg_queue_free(struct msg_queue *msq) | |
1821 | { | |
ac8f82a0 CS |
1822 | struct kern_ipc_perm *kip = &msq->q_perm; |
1823 | ||
f25fce3e | 1824 | call_void_hook(msg_queue_free_security, msq); |
ac8f82a0 CS |
1825 | kfree(kip->security); |
1826 | kip->security = NULL; | |
20510f2f JM |
1827 | } |
1828 | ||
1829 | int security_msg_queue_associate(struct msg_queue *msq, int msqflg) | |
1830 | { | |
f25fce3e | 1831 | return call_int_hook(msg_queue_associate, 0, msq, msqflg); |
20510f2f JM |
1832 | } |
1833 | ||
1834 | int security_msg_queue_msgctl(struct msg_queue *msq, int cmd) | |
1835 | { | |
f25fce3e | 1836 | return call_int_hook(msg_queue_msgctl, 0, msq, cmd); |
20510f2f JM |
1837 | } |
1838 | ||
1839 | int security_msg_queue_msgsnd(struct msg_queue *msq, | |
1840 | struct msg_msg *msg, int msqflg) | |
1841 | { | |
f25fce3e | 1842 | return call_int_hook(msg_queue_msgsnd, 0, msq, msg, msqflg); |
20510f2f JM |
1843 | } |
1844 | ||
1845 | int security_msg_queue_msgrcv(struct msg_queue *msq, struct msg_msg *msg, | |
1846 | struct task_struct *target, long type, int mode) | |
1847 | { | |
f25fce3e | 1848 | return call_int_hook(msg_queue_msgrcv, 0, msq, msg, target, type, mode); |
20510f2f JM |
1849 | } |
1850 | ||
1851 | int security_shm_alloc(struct shmid_kernel *shp) | |
1852 | { | |
ac8f82a0 CS |
1853 | int rc = lsm_ipc_alloc(&shp->shm_perm); |
1854 | ||
1855 | if (rc) | |
1856 | return rc; | |
f25fce3e | 1857 | return call_int_hook(shm_alloc_security, 0, shp); |
20510f2f JM |
1858 | } |
1859 | ||
1860 | void security_shm_free(struct shmid_kernel *shp) | |
1861 | { | |
ac8f82a0 CS |
1862 | struct kern_ipc_perm *kip = &shp->shm_perm; |
1863 | ||
f25fce3e | 1864 | call_void_hook(shm_free_security, shp); |
ac8f82a0 CS |
1865 | kfree(kip->security); |
1866 | kip->security = NULL; | |
20510f2f JM |
1867 | } |
1868 | ||
1869 | int security_shm_associate(struct shmid_kernel *shp, int shmflg) | |
1870 | { | |
f25fce3e | 1871 | return call_int_hook(shm_associate, 0, shp, shmflg); |
20510f2f JM |
1872 | } |
1873 | ||
1874 | int security_shm_shmctl(struct shmid_kernel *shp, int cmd) | |
1875 | { | |
f25fce3e | 1876 | return call_int_hook(shm_shmctl, 0, shp, cmd); |
20510f2f JM |
1877 | } |
1878 | ||
1879 | int security_shm_shmat(struct shmid_kernel *shp, char __user *shmaddr, int shmflg) | |
1880 | { | |
f25fce3e | 1881 | return call_int_hook(shm_shmat, 0, shp, shmaddr, shmflg); |
20510f2f JM |
1882 | } |
1883 | ||
1884 | int security_sem_alloc(struct sem_array *sma) | |
1885 | { | |
ac8f82a0 CS |
1886 | int rc = lsm_ipc_alloc(&sma->sem_perm); |
1887 | ||
1888 | if (rc) | |
1889 | return rc; | |
f25fce3e | 1890 | return call_int_hook(sem_alloc_security, 0, sma); |
20510f2f JM |
1891 | } |
1892 | ||
1893 | void security_sem_free(struct sem_array *sma) | |
1894 | { | |
ac8f82a0 CS |
1895 | struct kern_ipc_perm *kip = &sma->sem_perm; |
1896 | ||
f25fce3e | 1897 | call_void_hook(sem_free_security, sma); |
ac8f82a0 CS |
1898 | kfree(kip->security); |
1899 | kip->security = NULL; | |
20510f2f JM |
1900 | } |
1901 | ||
1902 | int security_sem_associate(struct sem_array *sma, int semflg) | |
1903 | { | |
f25fce3e | 1904 | return call_int_hook(sem_associate, 0, sma, semflg); |
20510f2f JM |
1905 | } |
1906 | ||
1907 | int security_sem_semctl(struct sem_array *sma, int cmd) | |
1908 | { | |
f25fce3e | 1909 | return call_int_hook(sem_semctl, 0, sma, cmd); |
20510f2f JM |
1910 | } |
1911 | ||
1912 | int security_sem_semop(struct sem_array *sma, struct sembuf *sops, | |
1913 | unsigned nsops, int alter) | |
1914 | { | |
f25fce3e | 1915 | return call_int_hook(sem_semop, 0, sma, sops, nsops, alter); |
20510f2f JM |
1916 | } |
1917 | ||
1918 | void security_d_instantiate(struct dentry *dentry, struct inode *inode) | |
1919 | { | |
1920 | if (unlikely(inode && IS_PRIVATE(inode))) | |
1921 | return; | |
f25fce3e | 1922 | call_void_hook(d_instantiate, dentry, inode); |
20510f2f JM |
1923 | } |
1924 | EXPORT_SYMBOL(security_d_instantiate); | |
1925 | ||
9eee8d63 CS |
1926 | int security_getprocattr(struct task_struct *p, const char *lsm, char *name, |
1927 | char **value) | |
20510f2f | 1928 | { |
ab5e2f3f JJ |
1929 | #ifdef CONFIG_SECURITY_STACKING |
1930 | char *speclsm = lsm_of_task(p); | |
1931 | #endif | |
9eee8d63 | 1932 | struct security_hook_list *hp; |
a3c3cde2 CS |
1933 | char *vp; |
1934 | char *cp = NULL; | |
1935 | int trc; | |
9eee8d63 CS |
1936 | int rc; |
1937 | ||
a3c3cde2 CS |
1938 | /* |
1939 | * "context" requires work here in addition to what | |
1940 | * the modules provide. | |
1941 | */ | |
1942 | if (strcmp(name, "context") == 0) { | |
1943 | *value = NULL; | |
1944 | rc = -EINVAL; | |
1945 | list_for_each_entry(hp, | |
1946 | &security_hook_heads.getprocattr, list) { | |
1947 | if (lsm != NULL && strcmp(lsm, hp->lsm)) | |
1948 | continue; | |
1949 | trc = hp->hook.getprocattr(p, "context", &vp); | |
1950 | if (trc == -ENOENT) | |
1951 | continue; | |
1952 | if (trc <= 0) { | |
1953 | kfree(*value); | |
1954 | return trc; | |
1955 | } | |
1956 | rc = trc; | |
1957 | if (*value == NULL) { | |
1958 | *value = vp; | |
1959 | } else { | |
1960 | cp = kasprintf(GFP_KERNEL, "%s,%s", *value, vp); | |
1961 | if (cp == NULL) { | |
1962 | kfree(*value); | |
1963 | kfree(vp); | |
1964 | return -ENOMEM; | |
1965 | } | |
1966 | kfree(*value); | |
1967 | kfree(vp); | |
1968 | *value = cp; | |
1969 | } | |
1970 | } | |
1971 | if (rc > 0) | |
1972 | return strlen(*value); | |
1973 | return rc; | |
281260ac JJ |
1974 | } else if (strcmp(name, "display_lsm") == 0) { |
1975 | *value = kstrdup(current->security, GFP_KERNEL); | |
1976 | if (*value == NULL) | |
1977 | return -ENOMEM; | |
1978 | return strlen(*value); | |
a3c3cde2 CS |
1979 | } |
1980 | ||
9eee8d63 CS |
1981 | list_for_each_entry(hp, &security_hook_heads.getprocattr, list) { |
1982 | if (lsm != NULL && strcmp(lsm, hp->lsm)) | |
1983 | continue; | |
ab5e2f3f JJ |
1984 | #ifdef CONFIG_SECURITY_STACKING |
1985 | if (!lsm && speclsm && speclsm[0] && strcmp(speclsm, hp->lsm)) | |
1986 | continue; | |
1987 | #endif | |
9eee8d63 | 1988 | rc = hp->hook.getprocattr(p, name, value); |
4b84c3ba | 1989 | if (rc != -ENOSYS) |
9eee8d63 CS |
1990 | return rc; |
1991 | } | |
1992 | return -EINVAL; | |
20510f2f JM |
1993 | } |
1994 | ||
9eee8d63 CS |
1995 | int security_setprocattr(const char *lsm, const char *name, void *value, |
1996 | size_t size) | |
20510f2f | 1997 | { |
ab5e2f3f JJ |
1998 | #ifdef CONFIG_SECURITY_STACKING |
1999 | char *speclsm = lsm_of_task(current); | |
2000 | struct lsm_value *lsm_value = NULL; | |
2001 | int count; | |
2002 | #else | |
2003 | char *tvalue; | |
2004 | #endif | |
9eee8d63 CS |
2005 | struct security_hook_list *hp; |
2006 | int rc; | |
ab5e2f3f | 2007 | char *temp; |
a3c3cde2 | 2008 | char *cp; |
a3c3cde2 | 2009 | |
e183feca CIK |
2010 | if (!size) |
2011 | return -EINVAL; | |
2012 | ||
a3c3cde2 CS |
2013 | /* |
2014 | * If lsm is NULL look at all the modules to find one | |
2015 | * that processes name. If lsm is not NULL only look at | |
2016 | * that module. | |
2017 | * | |
2018 | * "context" is handled directly here. | |
2019 | */ | |
2020 | if (strcmp(name, "context") == 0) { | |
a3c3cde2 | 2021 | rc = -EINVAL; |
ab5e2f3f JJ |
2022 | temp = kmemdup(value, size + 1, GFP_KERNEL); |
2023 | if (!temp) | |
2024 | return -ENOMEM; | |
2025 | ||
2026 | temp[size] = '\0'; | |
2027 | cp = strrchr(temp, '\''); | |
2028 | if (!cp) | |
2029 | goto free_out; | |
2030 | ||
2031 | cp[1] = '\0'; | |
2032 | #ifdef CONFIG_SECURITY_STACKING | |
2033 | lsm_value = kzalloc(sizeof(*lsm_value) * LSM_MAX_MAJOR, | |
2034 | GFP_KERNEL); | |
2035 | if (!lsm_value) { | |
2036 | rc = -ENOMEM; | |
2037 | goto free_out; | |
a3c3cde2 CS |
2038 | } |
2039 | ||
ab5e2f3f JJ |
2040 | count = lsm_parse_context(temp, lsm_value); |
2041 | if (count <= 0) | |
2042 | goto free_out; | |
2043 | ||
2044 | for (count--; count >= 0; count--) { | |
2045 | list_for_each_entry(hp, | |
2046 | &security_hook_heads.setprocattr, list) { | |
2047 | ||
2048 | if (lsm && strcmp(lsm, hp->lsm)) | |
2049 | continue; | |
2050 | if (!strcmp(hp->lsm, lsm_value[count].lsm)) { | |
2051 | rc = hp->hook.setprocattr("context", | |
2052 | lsm_value[count].data, | |
2053 | strlen(lsm_value[count].data)); | |
2054 | break; | |
2055 | } | |
2056 | } | |
2057 | if (rc < 0 || (lsm && rc >0)) | |
2058 | break; | |
2059 | } | |
2060 | #else /* CONFIG_SECURITY_STACKING */ | |
2061 | cp = strstr(temp, "='"); | |
2062 | if (!cp) | |
2063 | goto free_out; | |
2064 | *cp = '\0'; | |
2065 | tvalue = strchr(cp + 2, '\''); | |
2066 | if (!tvalue) | |
2067 | goto free_out; | |
a3c3cde2 | 2068 | list_for_each_entry(hp, &security_hook_heads.setprocattr, |
ab5e2f3f JJ |
2069 | list) { |
2070 | if (lsm == NULL || !strcmp(lsm, hp->lsm)) { | |
2071 | rc = hp->hook.setprocattr(name, tvalue, size); | |
2072 | break; | |
2073 | } | |
a3c3cde2 | 2074 | } |
ab5e2f3f | 2075 | #endif /* CONFIG_SECURITY_STACKING */ |
a3c3cde2 | 2076 | free_out: |
ab5e2f3f JJ |
2077 | kfree(temp); |
2078 | #ifdef CONFIG_SECURITY_STACKING | |
2079 | kfree(lsm_value); | |
2080 | #endif | |
2081 | if (rc >= 0) | |
2082 | return size; | |
a3c3cde2 | 2083 | return rc; |
281260ac JJ |
2084 | } else if (strcmp(name, "display_lsm") == 0) { |
2085 | #ifdef CONFIG_SECURITY_STACKING | |
2086 | if (set_lsm_of_current(value, size)) | |
2087 | return size; | |
2088 | #endif | |
2089 | return -EINVAL; | |
a3c3cde2 | 2090 | } |
9eee8d63 CS |
2091 | |
2092 | list_for_each_entry(hp, &security_hook_heads.setprocattr, list) { | |
ab5e2f3f | 2093 | if (lsm && strcmp(lsm, hp->lsm)) |
9eee8d63 | 2094 | continue; |
ab5e2f3f JJ |
2095 | #ifdef CONFIG_SECURITY_STACKING |
2096 | if (!lsm && speclsm && speclsm[0] && strcmp(speclsm, hp->lsm)) | |
2097 | continue; | |
2098 | #endif | |
9eee8d63 | 2099 | rc = hp->hook.setprocattr(name, value, size); |
4b84c3ba | 2100 | if (rc) |
9eee8d63 CS |
2101 | return rc; |
2102 | } | |
2103 | return -EINVAL; | |
20510f2f JM |
2104 | } |
2105 | ||
2106 | int security_netlink_send(struct sock *sk, struct sk_buff *skb) | |
2107 | { | |
f25fce3e | 2108 | return call_int_hook(netlink_send, 0, sk, skb); |
20510f2f | 2109 | } |
20510f2f | 2110 | |
746df9b5 DQ |
2111 | int security_ismaclabel(const char *name) |
2112 | { | |
f25fce3e | 2113 | return call_int_hook(ismaclabel, 0, name); |
746df9b5 DQ |
2114 | } |
2115 | EXPORT_SYMBOL(security_ismaclabel); | |
2116 | ||
20510f2f JM |
2117 | int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen) |
2118 | { | |
b1d9e6b0 CS |
2119 | return call_int_hook(secid_to_secctx, -EOPNOTSUPP, secid, secdata, |
2120 | seclen); | |
20510f2f JM |
2121 | } |
2122 | EXPORT_SYMBOL(security_secid_to_secctx); | |
2123 | ||
7bf570dc | 2124 | int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid) |
63cb3449 | 2125 | { |
b1d9e6b0 | 2126 | *secid = 0; |
f25fce3e | 2127 | return call_int_hook(secctx_to_secid, 0, secdata, seclen, secid); |
63cb3449 DH |
2128 | } |
2129 | EXPORT_SYMBOL(security_secctx_to_secid); | |
2130 | ||
20510f2f JM |
2131 | void security_release_secctx(char *secdata, u32 seclen) |
2132 | { | |
ab5e2f3f JJ |
2133 | #ifdef CONFIG_SECURITY_STACKING |
2134 | char *speclsm = lsm_of_task(current); | |
2135 | #endif | |
2136 | struct security_hook_list *hp; | |
2137 | ||
2138 | list_for_each_entry(hp, &security_hook_heads.release_secctx, list) { | |
2139 | #ifdef CONFIG_SECURITY_STACKING | |
2140 | if (speclsm[0] && strcmp(hp->lsm, speclsm)) | |
2141 | continue; | |
2142 | #endif | |
2143 | hp->hook.release_secctx(secdata, seclen); | |
2144 | break; | |
2145 | } | |
20510f2f JM |
2146 | } |
2147 | EXPORT_SYMBOL(security_release_secctx); | |
2148 | ||
6f3be9f5 AG |
2149 | void security_inode_invalidate_secctx(struct inode *inode) |
2150 | { | |
2151 | call_void_hook(inode_invalidate_secctx, inode); | |
2152 | } | |
2153 | EXPORT_SYMBOL(security_inode_invalidate_secctx); | |
2154 | ||
1ee65e37 DQ |
2155 | int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen) |
2156 | { | |
f25fce3e | 2157 | return call_int_hook(inode_notifysecctx, 0, inode, ctx, ctxlen); |
1ee65e37 DQ |
2158 | } |
2159 | EXPORT_SYMBOL(security_inode_notifysecctx); | |
2160 | ||
2161 | int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen) | |
2162 | { | |
f25fce3e | 2163 | return call_int_hook(inode_setsecctx, 0, dentry, ctx, ctxlen); |
1ee65e37 DQ |
2164 | } |
2165 | EXPORT_SYMBOL(security_inode_setsecctx); | |
2166 | ||
2167 | int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen) | |
2168 | { | |
b1d9e6b0 | 2169 | return call_int_hook(inode_getsecctx, -EOPNOTSUPP, inode, ctx, ctxlen); |
1ee65e37 DQ |
2170 | } |
2171 | EXPORT_SYMBOL(security_inode_getsecctx); | |
2172 | ||
20510f2f JM |
2173 | #ifdef CONFIG_SECURITY_NETWORK |
2174 | ||
3610cda5 | 2175 | int security_unix_stream_connect(struct sock *sock, struct sock *other, struct sock *newsk) |
20510f2f | 2176 | { |
f25fce3e | 2177 | return call_int_hook(unix_stream_connect, 0, sock, other, newsk); |
20510f2f JM |
2178 | } |
2179 | EXPORT_SYMBOL(security_unix_stream_connect); | |
2180 | ||
2181 | int security_unix_may_send(struct socket *sock, struct socket *other) | |
2182 | { | |
f25fce3e | 2183 | return call_int_hook(unix_may_send, 0, sock, other); |
20510f2f JM |
2184 | } |
2185 | EXPORT_SYMBOL(security_unix_may_send); | |
2186 | ||
2187 | int security_socket_create(int family, int type, int protocol, int kern) | |
2188 | { | |
f25fce3e | 2189 | return call_int_hook(socket_create, 0, family, type, protocol, kern); |
20510f2f JM |
2190 | } |
2191 | ||
2192 | int security_socket_post_create(struct socket *sock, int family, | |
2193 | int type, int protocol, int kern) | |
2194 | { | |
f25fce3e | 2195 | return call_int_hook(socket_post_create, 0, sock, family, type, |
20510f2f JM |
2196 | protocol, kern); |
2197 | } | |
2198 | ||
2199 | int security_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen) | |
2200 | { | |
f25fce3e | 2201 | return call_int_hook(socket_bind, 0, sock, address, addrlen); |
20510f2f JM |
2202 | } |
2203 | ||
2204 | int security_socket_connect(struct socket *sock, struct sockaddr *address, int addrlen) | |
2205 | { | |
f25fce3e | 2206 | return call_int_hook(socket_connect, 0, sock, address, addrlen); |
20510f2f JM |
2207 | } |
2208 | ||
2209 | int security_socket_listen(struct socket *sock, int backlog) | |
2210 | { | |
f25fce3e | 2211 | return call_int_hook(socket_listen, 0, sock, backlog); |
20510f2f JM |
2212 | } |
2213 | ||
2214 | int security_socket_accept(struct socket *sock, struct socket *newsock) | |
2215 | { | |
f25fce3e | 2216 | return call_int_hook(socket_accept, 0, sock, newsock); |
20510f2f JM |
2217 | } |
2218 | ||
20510f2f JM |
2219 | int security_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size) |
2220 | { | |
f25fce3e | 2221 | return call_int_hook(socket_sendmsg, 0, sock, msg, size); |
20510f2f JM |
2222 | } |
2223 | ||
2224 | int security_socket_recvmsg(struct socket *sock, struct msghdr *msg, | |
2225 | int size, int flags) | |
2226 | { | |
f25fce3e | 2227 | return call_int_hook(socket_recvmsg, 0, sock, msg, size, flags); |
20510f2f JM |
2228 | } |
2229 | ||
2230 | int security_socket_getsockname(struct socket *sock) | |
2231 | { | |
f25fce3e | 2232 | return call_int_hook(socket_getsockname, 0, sock); |
20510f2f JM |
2233 | } |
2234 | ||
2235 | int security_socket_getpeername(struct socket *sock) | |
2236 | { | |
f25fce3e | 2237 | return call_int_hook(socket_getpeername, 0, sock); |
20510f2f JM |
2238 | } |
2239 | ||
2240 | int security_socket_getsockopt(struct socket *sock, int level, int optname) | |
2241 | { | |
f25fce3e | 2242 | return call_int_hook(socket_getsockopt, 0, sock, level, optname); |
20510f2f JM |
2243 | } |
2244 | ||
2245 | int security_socket_setsockopt(struct socket *sock, int level, int optname) | |
2246 | { | |
f25fce3e | 2247 | return call_int_hook(socket_setsockopt, 0, sock, level, optname); |
20510f2f JM |
2248 | } |
2249 | ||
2250 | int security_socket_shutdown(struct socket *sock, int how) | |
2251 | { | |
f25fce3e | 2252 | return call_int_hook(socket_shutdown, 0, sock, how); |
20510f2f JM |
2253 | } |
2254 | ||
2255 | int security_sock_rcv_skb(struct sock *sk, struct sk_buff *skb) | |
2256 | { | |
f25fce3e | 2257 | return call_int_hook(socket_sock_rcv_skb, 0, sk, skb); |
20510f2f JM |
2258 | } |
2259 | EXPORT_SYMBOL(security_sock_rcv_skb); | |
2260 | ||
2261 | int security_socket_getpeersec_stream(struct socket *sock, char __user *optval, | |
2262 | int __user *optlen, unsigned len) | |
2263 | { | |
d827e191 JJ |
2264 | #ifdef CONFIG_SECURITY_STACKING |
2265 | struct security_hook_list *hp; | |
2266 | char *lsm = lsm_of_task(current); | |
2267 | ||
2268 | list_for_each_entry(hp, &security_hook_heads.socket_getpeersec_stream, | |
2269 | list) { | |
2270 | if (!lsm || !lsm[0] || !strcmp(lsm, hp->lsm)) | |
2271 | return hp->hook.socket_getpeersec_stream(sock, optval, | |
2272 | optlen, len); | |
2273 | } | |
2274 | return -ENOPROTOOPT; | |
2275 | #else | |
b1d9e6b0 CS |
2276 | return call_int_hook(socket_getpeersec_stream, -ENOPROTOOPT, sock, |
2277 | optval, optlen, len); | |
d827e191 | 2278 | #endif |
20510f2f JM |
2279 | } |
2280 | ||
2281 | int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid) | |
2282 | { | |
e308fd3b JB |
2283 | return call_int_hook(socket_getpeersec_dgram, -ENOPROTOOPT, sock, |
2284 | skb, secid); | |
20510f2f JM |
2285 | } |
2286 | EXPORT_SYMBOL(security_socket_getpeersec_dgram); | |
2287 | ||
2288 | int security_sk_alloc(struct sock *sk, int family, gfp_t priority) | |
2289 | { | |
ac8f82a0 CS |
2290 | int rc = lsm_sock_alloc(sk, priority); |
2291 | ||
2292 | if (rc) | |
2293 | return rc; | |
f25fce3e | 2294 | return call_int_hook(sk_alloc_security, 0, sk, family, priority); |
20510f2f JM |
2295 | } |
2296 | ||
2297 | void security_sk_free(struct sock *sk) | |
2298 | { | |
f25fce3e | 2299 | call_void_hook(sk_free_security, sk); |
ac8f82a0 CS |
2300 | kfree(sk->sk_security); |
2301 | sk->sk_security = NULL; | |
20510f2f JM |
2302 | } |
2303 | ||
2304 | void security_sk_clone(const struct sock *sk, struct sock *newsk) | |
2305 | { | |
f25fce3e | 2306 | call_void_hook(sk_clone_security, sk, newsk); |
20510f2f | 2307 | } |
6230c9b4 | 2308 | EXPORT_SYMBOL(security_sk_clone); |
20510f2f JM |
2309 | |
2310 | void security_sk_classify_flow(struct sock *sk, struct flowi *fl) | |
2311 | { | |
f25fce3e | 2312 | call_void_hook(sk_getsecid, sk, &fl->flowi_secid); |
20510f2f JM |
2313 | } |
2314 | EXPORT_SYMBOL(security_sk_classify_flow); | |
2315 | ||
2316 | void security_req_classify_flow(const struct request_sock *req, struct flowi *fl) | |
2317 | { | |
f25fce3e | 2318 | call_void_hook(req_classify_flow, req, fl); |
20510f2f JM |
2319 | } |
2320 | EXPORT_SYMBOL(security_req_classify_flow); | |
2321 | ||
2322 | void security_sock_graft(struct sock *sk, struct socket *parent) | |
2323 | { | |
f25fce3e | 2324 | call_void_hook(sock_graft, sk, parent); |
20510f2f JM |
2325 | } |
2326 | EXPORT_SYMBOL(security_sock_graft); | |
2327 | ||
2328 | int security_inet_conn_request(struct sock *sk, | |
2329 | struct sk_buff *skb, struct request_sock *req) | |
2330 | { | |
f25fce3e | 2331 | return call_int_hook(inet_conn_request, 0, sk, skb, req); |
20510f2f JM |
2332 | } |
2333 | EXPORT_SYMBOL(security_inet_conn_request); | |
2334 | ||
2335 | void security_inet_csk_clone(struct sock *newsk, | |
2336 | const struct request_sock *req) | |
2337 | { | |
f25fce3e | 2338 | call_void_hook(inet_csk_clone, newsk, req); |
20510f2f JM |
2339 | } |
2340 | ||
2341 | void security_inet_conn_established(struct sock *sk, | |
2342 | struct sk_buff *skb) | |
2343 | { | |
f25fce3e | 2344 | call_void_hook(inet_conn_established, sk, skb); |
20510f2f JM |
2345 | } |
2346 | ||
2606fd1f EP |
2347 | int security_secmark_relabel_packet(u32 secid) |
2348 | { | |
f25fce3e | 2349 | return call_int_hook(secmark_relabel_packet, 0, secid); |
2606fd1f EP |
2350 | } |
2351 | EXPORT_SYMBOL(security_secmark_relabel_packet); | |
2352 | ||
2353 | void security_secmark_refcount_inc(void) | |
2354 | { | |
f25fce3e | 2355 | call_void_hook(secmark_refcount_inc); |
2606fd1f EP |
2356 | } |
2357 | EXPORT_SYMBOL(security_secmark_refcount_inc); | |
2358 | ||
2359 | void security_secmark_refcount_dec(void) | |
2360 | { | |
f25fce3e | 2361 | call_void_hook(secmark_refcount_dec); |
2606fd1f EP |
2362 | } |
2363 | EXPORT_SYMBOL(security_secmark_refcount_dec); | |
2364 | ||
5dbbaf2d PM |
2365 | int security_tun_dev_alloc_security(void **security) |
2366 | { | |
f25fce3e | 2367 | return call_int_hook(tun_dev_alloc_security, 0, security); |
5dbbaf2d PM |
2368 | } |
2369 | EXPORT_SYMBOL(security_tun_dev_alloc_security); | |
2370 | ||
2371 | void security_tun_dev_free_security(void *security) | |
2372 | { | |
f25fce3e | 2373 | call_void_hook(tun_dev_free_security, security); |
5dbbaf2d PM |
2374 | } |
2375 | EXPORT_SYMBOL(security_tun_dev_free_security); | |
2376 | ||
2b980dbd PM |
2377 | int security_tun_dev_create(void) |
2378 | { | |
f25fce3e | 2379 | return call_int_hook(tun_dev_create, 0); |
2b980dbd PM |
2380 | } |
2381 | EXPORT_SYMBOL(security_tun_dev_create); | |
2382 | ||
5dbbaf2d | 2383 | int security_tun_dev_attach_queue(void *security) |
2b980dbd | 2384 | { |
f25fce3e | 2385 | return call_int_hook(tun_dev_attach_queue, 0, security); |
2b980dbd | 2386 | } |
5dbbaf2d | 2387 | EXPORT_SYMBOL(security_tun_dev_attach_queue); |
2b980dbd | 2388 | |
5dbbaf2d | 2389 | int security_tun_dev_attach(struct sock *sk, void *security) |
2b980dbd | 2390 | { |
f25fce3e | 2391 | return call_int_hook(tun_dev_attach, 0, sk, security); |
2b980dbd PM |
2392 | } |
2393 | EXPORT_SYMBOL(security_tun_dev_attach); | |
2394 | ||
5dbbaf2d PM |
2395 | int security_tun_dev_open(void *security) |
2396 | { | |
f25fce3e | 2397 | return call_int_hook(tun_dev_open, 0, security); |
5dbbaf2d PM |
2398 | } |
2399 | EXPORT_SYMBOL(security_tun_dev_open); | |
2400 | ||
20510f2f JM |
2401 | #endif /* CONFIG_SECURITY_NETWORK */ |
2402 | ||
d291f1a6 DJ |
2403 | #ifdef CONFIG_SECURITY_INFINIBAND |
2404 | ||
2405 | int security_ib_pkey_access(void *sec, u64 subnet_prefix, u16 pkey) | |
2406 | { | |
2407 | return call_int_hook(ib_pkey_access, 0, sec, subnet_prefix, pkey); | |
2408 | } | |
2409 | EXPORT_SYMBOL(security_ib_pkey_access); | |
2410 | ||
47a2b338 DJ |
2411 | int security_ib_endport_manage_subnet(void *sec, const char *dev_name, u8 port_num) |
2412 | { | |
2413 | return call_int_hook(ib_endport_manage_subnet, 0, sec, dev_name, port_num); | |
2414 | } | |
2415 | EXPORT_SYMBOL(security_ib_endport_manage_subnet); | |
2416 | ||
d291f1a6 DJ |
2417 | int security_ib_alloc_security(void **sec) |
2418 | { | |
2419 | return call_int_hook(ib_alloc_security, 0, sec); | |
2420 | } | |
2421 | EXPORT_SYMBOL(security_ib_alloc_security); | |
2422 | ||
2423 | void security_ib_free_security(void *sec) | |
2424 | { | |
2425 | call_void_hook(ib_free_security, sec); | |
2426 | } | |
2427 | EXPORT_SYMBOL(security_ib_free_security); | |
2428 | #endif /* CONFIG_SECURITY_INFINIBAND */ | |
2429 | ||
20510f2f JM |
2430 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
2431 | ||
52a4c640 NA |
2432 | int security_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp, |
2433 | struct xfrm_user_sec_ctx *sec_ctx, | |
2434 | gfp_t gfp) | |
20510f2f | 2435 | { |
f25fce3e | 2436 | return call_int_hook(xfrm_policy_alloc_security, 0, ctxp, sec_ctx, gfp); |
20510f2f JM |
2437 | } |
2438 | EXPORT_SYMBOL(security_xfrm_policy_alloc); | |
2439 | ||
03e1ad7b PM |
2440 | int security_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx, |
2441 | struct xfrm_sec_ctx **new_ctxp) | |
20510f2f | 2442 | { |
f25fce3e | 2443 | return call_int_hook(xfrm_policy_clone_security, 0, old_ctx, new_ctxp); |
20510f2f JM |
2444 | } |
2445 | ||
03e1ad7b | 2446 | void security_xfrm_policy_free(struct xfrm_sec_ctx *ctx) |
20510f2f | 2447 | { |
f25fce3e | 2448 | call_void_hook(xfrm_policy_free_security, ctx); |
20510f2f JM |
2449 | } |
2450 | EXPORT_SYMBOL(security_xfrm_policy_free); | |
2451 | ||
03e1ad7b | 2452 | int security_xfrm_policy_delete(struct xfrm_sec_ctx *ctx) |
20510f2f | 2453 | { |
f25fce3e | 2454 | return call_int_hook(xfrm_policy_delete_security, 0, ctx); |
20510f2f JM |
2455 | } |
2456 | ||
2e5aa866 PM |
2457 | int security_xfrm_state_alloc(struct xfrm_state *x, |
2458 | struct xfrm_user_sec_ctx *sec_ctx) | |
20510f2f | 2459 | { |
f25fce3e | 2460 | return call_int_hook(xfrm_state_alloc, 0, x, sec_ctx); |
20510f2f JM |
2461 | } |
2462 | EXPORT_SYMBOL(security_xfrm_state_alloc); | |
2463 | ||
2464 | int security_xfrm_state_alloc_acquire(struct xfrm_state *x, | |
2465 | struct xfrm_sec_ctx *polsec, u32 secid) | |
2466 | { | |
f25fce3e | 2467 | return call_int_hook(xfrm_state_alloc_acquire, 0, x, polsec, secid); |
20510f2f JM |
2468 | } |
2469 | ||
2470 | int security_xfrm_state_delete(struct xfrm_state *x) | |
2471 | { | |
f25fce3e | 2472 | return call_int_hook(xfrm_state_delete_security, 0, x); |
20510f2f JM |
2473 | } |
2474 | EXPORT_SYMBOL(security_xfrm_state_delete); | |
2475 | ||
2476 | void security_xfrm_state_free(struct xfrm_state *x) | |
2477 | { | |
f25fce3e | 2478 | call_void_hook(xfrm_state_free_security, x); |
20510f2f JM |
2479 | } |
2480 | ||
03e1ad7b | 2481 | int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir) |
20510f2f | 2482 | { |
f25fce3e | 2483 | return call_int_hook(xfrm_policy_lookup, 0, ctx, fl_secid, dir); |
20510f2f JM |
2484 | } |
2485 | ||
2486 | int security_xfrm_state_pol_flow_match(struct xfrm_state *x, | |
e33f7704 DM |
2487 | struct xfrm_policy *xp, |
2488 | const struct flowi *fl) | |
20510f2f | 2489 | { |
b1d9e6b0 CS |
2490 | struct security_hook_list *hp; |
2491 | int rc = 1; | |
2492 | ||
2493 | /* | |
2494 | * Since this function is expected to return 0 or 1, the judgment | |
2495 | * becomes difficult if multiple LSMs supply this call. Fortunately, | |
2496 | * we can use the first LSM's judgment because currently only SELinux | |
2497 | * supplies this call. | |
2498 | * | |
2499 | * For speed optimization, we explicitly break the loop rather than | |
2500 | * using the macro | |
2501 | */ | |
2502 | list_for_each_entry(hp, &security_hook_heads.xfrm_state_pol_flow_match, | |
2503 | list) { | |
2504 | rc = hp->hook.xfrm_state_pol_flow_match(x, xp, fl); | |
2505 | break; | |
2506 | } | |
2507 | return rc; | |
20510f2f JM |
2508 | } |
2509 | ||
2510 | int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid) | |
2511 | { | |
f25fce3e | 2512 | return call_int_hook(xfrm_decode_session, 0, skb, secid, 1); |
20510f2f JM |
2513 | } |
2514 | ||
2515 | void security_skb_classify_flow(struct sk_buff *skb, struct flowi *fl) | |
2516 | { | |
f25fce3e CS |
2517 | int rc = call_int_hook(xfrm_decode_session, 0, skb, &fl->flowi_secid, |
2518 | 0); | |
20510f2f JM |
2519 | |
2520 | BUG_ON(rc); | |
2521 | } | |
2522 | EXPORT_SYMBOL(security_skb_classify_flow); | |
2523 | ||
2524 | #endif /* CONFIG_SECURITY_NETWORK_XFRM */ | |
2525 | ||
2526 | #ifdef CONFIG_KEYS | |
2527 | ||
d84f4f99 DH |
2528 | int security_key_alloc(struct key *key, const struct cred *cred, |
2529 | unsigned long flags) | |
20510f2f | 2530 | { |
ac8f82a0 CS |
2531 | int rc = lsm_key_alloc(key); |
2532 | ||
2533 | if (rc) | |
2534 | return rc; | |
f25fce3e | 2535 | return call_int_hook(key_alloc, 0, key, cred, flags); |
20510f2f JM |
2536 | } |
2537 | ||
2538 | void security_key_free(struct key *key) | |
2539 | { | |
f25fce3e | 2540 | call_void_hook(key_free, key); |
ac8f82a0 CS |
2541 | kfree(key->security); |
2542 | key->security = NULL; | |
20510f2f JM |
2543 | } |
2544 | ||
2545 | int security_key_permission(key_ref_t key_ref, | |
f5895943 | 2546 | const struct cred *cred, unsigned perm) |
20510f2f | 2547 | { |
f25fce3e | 2548 | return call_int_hook(key_permission, 0, key_ref, cred, perm); |
20510f2f JM |
2549 | } |
2550 | ||
70a5bb72 DH |
2551 | int security_key_getsecurity(struct key *key, char **_buffer) |
2552 | { | |
b1d9e6b0 | 2553 | *_buffer = NULL; |
f25fce3e | 2554 | return call_int_hook(key_getsecurity, 0, key, _buffer); |
70a5bb72 DH |
2555 | } |
2556 | ||
20510f2f | 2557 | #endif /* CONFIG_KEYS */ |
03d37d25 AD |
2558 | |
2559 | #ifdef CONFIG_AUDIT | |
2560 | ||
2561 | int security_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule) | |
2562 | { | |
f25fce3e | 2563 | return call_int_hook(audit_rule_init, 0, field, op, rulestr, lsmrule); |
03d37d25 AD |
2564 | } |
2565 | ||
2566 | int security_audit_rule_known(struct audit_krule *krule) | |
2567 | { | |
f25fce3e | 2568 | return call_int_hook(audit_rule_known, 0, krule); |
03d37d25 AD |
2569 | } |
2570 | ||
2571 | void security_audit_rule_free(void *lsmrule) | |
2572 | { | |
f25fce3e | 2573 | call_void_hook(audit_rule_free, lsmrule); |
03d37d25 AD |
2574 | } |
2575 | ||
2576 | int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule, | |
2577 | struct audit_context *actx) | |
2578 | { | |
f25fce3e CS |
2579 | return call_int_hook(audit_rule_match, 0, secid, field, op, lsmrule, |
2580 | actx); | |
03d37d25 | 2581 | } |
b1d9e6b0 | 2582 | #endif /* CONFIG_AUDIT */ |