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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 | ||
afdb09c7 | 15 | #include <linux/bpf.h> |
c59ede7b | 16 | #include <linux/capability.h> |
d47be3df | 17 | #include <linux/dcache.h> |
1da177e4 LT |
18 | #include <linux/module.h> |
19 | #include <linux/init.h> | |
20 | #include <linux/kernel.h> | |
3c4ed7bd | 21 | #include <linux/lsm_hooks.h> |
f381c272 | 22 | #include <linux/integrity.h> |
6c21a7fb | 23 | #include <linux/ima.h> |
3e1be52d | 24 | #include <linux/evm.h> |
40401530 | 25 | #include <linux/fsnotify.h> |
8b3ec681 AV |
26 | #include <linux/mman.h> |
27 | #include <linux/mount.h> | |
28 | #include <linux/personality.h> | |
75331a59 | 29 | #include <linux/backing-dev.h> |
3bb857e4 | 30 | #include <linux/string.h> |
7a90fc39 | 31 | #include <linux/msg.h> |
a69a0684 | 32 | #include <linux/prctl.h> |
40401530 | 33 | #include <net/flow.h> |
7a90fc39 | 34 | #include <net/sock.h> |
1da177e4 | 35 | |
823eb1cc | 36 | #define MAX_LSM_EVM_XATTR 2 |
1da177e4 | 37 | |
b1d9e6b0 CS |
38 | /* Maximum number of letters for an LSM name string */ |
39 | #define SECURITY_NAME_MAX 10 | |
f9047a0c | 40 | #define SECURITY_CHOSEN_NAMES_MAX (SECURITY_NAME_MAX * LSM_MAX_MAJOR) |
54f4b36b | 41 | #define MODULE_STACK "(stacking)" |
b1d9e6b0 | 42 | |
3dfc9b02 | 43 | struct security_hook_heads security_hook_heads __lsm_ro_after_init; |
8f408ab6 DJ |
44 | static ATOMIC_NOTIFIER_HEAD(lsm_notifier_chain); |
45 | ||
ab9b110b | 46 | static struct kmem_cache *lsm_file_cache; |
7a90fc39 | 47 | static struct kmem_cache *lsm_inode_cache; |
ab9b110b | 48 | |
d69dece5 | 49 | char *lsm_names; |
a69a0684 JJ |
50 | |
51 | /* | |
52 | * If stacking is enabled the task blob will always | |
53 | * include an indicator of what security module data | |
54 | * should be displayed. This is set with PR_SET_DISPLAY_LSM. | |
55 | */ | |
56 | static struct lsm_blob_sizes blob_sizes = { | |
57 | #ifdef CONFIG_SECURITY_STACKING | |
469fbb39 | 58 | .lbs_task = SECURITY_NAME_MAX + 6, |
a69a0684 JJ |
59 | #endif |
60 | }; | |
f1efc8c4 | 61 | |
076c54c5 | 62 | /* Boot-time LSM user choice */ |
f9047a0c | 63 | static __initdata char chosen_lsms[SECURITY_CHOSEN_NAMES_MAX + 1] = |
54f4b36b CS |
64 | #ifdef CONFIG_SECURITY_STACKING |
65 | MODULE_STACK; | |
66 | #else | |
6e65f92f | 67 | CONFIG_DEFAULT_SECURITY; |
54f4b36b | 68 | #endif |
adf8a6ee JJ |
69 | static __initdata char chosen_display_lsm[SECURITY_NAME_MAX + 1] |
70 | #ifdef CONFIG_SECURITY_STACKING | |
71 | = CONFIG_SECURITY_DEFAULT_DISPLAY_NAME | |
72 | #endif | |
73 | ; | |
6a3b4b47 | 74 | static char default_display_lsm[SECURITY_NAME_MAX + 1]; |
1da177e4 | 75 | |
1da177e4 LT |
76 | static void __init do_security_initcalls(void) |
77 | { | |
78 | initcall_t *call; | |
79 | call = __security_initcall_start; | |
80 | while (call < __security_initcall_end) { | |
81 | (*call) (); | |
82 | call++; | |
83 | } | |
84 | } | |
85 | ||
86 | /** | |
87 | * security_init - initializes the security framework | |
88 | * | |
89 | * This should be called early in the kernel initialization sequence. | |
90 | */ | |
91 | int __init security_init(void) | |
92 | { | |
3dfc9b02 TH |
93 | int i; |
94 | struct list_head *list = (struct list_head *) &security_hook_heads; | |
95 | ||
96 | for (i = 0; i < sizeof(security_hook_heads) / sizeof(struct list_head); | |
97 | i++) | |
98 | INIT_LIST_HEAD(&list[i]); | |
b1d9e6b0 | 99 | pr_info("Security Framework initialized\n"); |
1da177e4 | 100 | |
b1d9e6b0 | 101 | /* |
730daa16 | 102 | * Load minor LSMs, with the capability module always first. |
b1d9e6b0 CS |
103 | */ |
104 | capability_add_hooks(); | |
b1d9e6b0 | 105 | yama_add_hooks(); |
9b091556 | 106 | loadpin_add_hooks(); |
730daa16 | 107 | |
b1d9e6b0 | 108 | /* |
f1efc8c4 CS |
109 | * The first call to a module specific init function |
110 | * updates the blob size requirements. | |
111 | */ | |
112 | do_security_initcalls(); | |
113 | ||
ab9b110b CS |
114 | /* |
115 | * Create any kmem_caches needed for blobs | |
116 | */ | |
117 | if (blob_sizes.lbs_file) | |
118 | lsm_file_cache = kmem_cache_create("lsm_file_cache", | |
119 | blob_sizes.lbs_file, 0, | |
120 | SLAB_PANIC, NULL); | |
7a90fc39 CS |
121 | if (blob_sizes.lbs_inode) |
122 | lsm_inode_cache = kmem_cache_create("lsm_inode_cache", | |
123 | blob_sizes.lbs_inode, 0, | |
124 | SLAB_PANIC, NULL); | |
f1efc8c4 CS |
125 | /* |
126 | * The second call to a module specific init function | |
127 | * adds hooks to the hook lists and does any other early | |
128 | * initializations required. | |
b1d9e6b0 | 129 | */ |
1da177e4 LT |
130 | do_security_initcalls(); |
131 | ||
f1efc8c4 CS |
132 | #ifdef CONFIG_SECURITY_LSM_DEBUG |
133 | pr_info("LSM: cred blob size = %d\n", blob_sizes.lbs_cred); | |
ab9b110b | 134 | pr_info("LSM: file blob size = %d\n", blob_sizes.lbs_file); |
7a90fc39 CS |
135 | pr_info("LSM: inode blob size = %d\n", blob_sizes.lbs_inode); |
136 | pr_info("LSM: ipc blob size = %d\n", blob_sizes.lbs_ipc); | |
137 | #ifdef CONFIG_KEYS | |
138 | pr_info("LSM: key blob size = %d\n", blob_sizes.lbs_key); | |
139 | #endif /* CONFIG_KEYS */ | |
140 | pr_info("LSM: msg_msg blob size = %d\n", blob_sizes.lbs_msg_msg); | |
141 | pr_info("LSM: sock blob size = %d\n", blob_sizes.lbs_sock); | |
142 | pr_info("LSM: superblock blob size = %d\n", blob_sizes.lbs_superblock); | |
7f79f508 | 143 | pr_info("LSM: task blob size = %d\n", blob_sizes.lbs_task); |
7a90fc39 | 144 | #endif /* CONFIG_SECURITY_LSM_DEBUG */ |
f1efc8c4 | 145 | |
1da177e4 LT |
146 | return 0; |
147 | } | |
148 | ||
076c54c5 AD |
149 | /* Save user chosen LSM */ |
150 | static int __init choose_lsm(char *str) | |
151 | { | |
f9047a0c JJ |
152 | strncpy(chosen_lsms, str, SECURITY_CHOSEN_NAMES_MAX); |
153 | pr_info("LSM: command line set '%s' security module(s).\n", | |
154 | chosen_lsms); | |
076c54c5 AD |
155 | return 1; |
156 | } | |
157 | __setup("security=", choose_lsm); | |
158 | ||
6a3b4b47 JJ |
159 | static int __init choose_display_lsm(char *str) |
160 | { | |
161 | strncpy(chosen_display_lsm, str, SECURITY_NAME_MAX); | |
162 | pr_info("LSM: command line set default display lsm %s'\n", | |
163 | chosen_display_lsm); | |
164 | return 1; | |
165 | } | |
166 | __setup("security.display=", choose_display_lsm); | |
167 | ||
3bb857e4 MS |
168 | static bool match_last_lsm(const char *list, const char *lsm) |
169 | { | |
170 | const char *last; | |
171 | ||
172 | if (WARN_ON(!list || !lsm)) | |
173 | return false; | |
174 | last = strrchr(list, ','); | |
175 | if (last) | |
176 | /* Pass the comma, strcmp() will check for '\0' */ | |
177 | last++; | |
178 | else | |
179 | last = list; | |
180 | return !strcmp(last, lsm); | |
181 | } | |
182 | ||
d69dece5 CS |
183 | static int lsm_append(char *new, char **result) |
184 | { | |
185 | char *cp; | |
186 | ||
187 | if (*result == NULL) { | |
188 | *result = kstrdup(new, GFP_KERNEL); | |
189 | } else { | |
3bb857e4 MS |
190 | /* Check if it is the last registered name */ |
191 | if (match_last_lsm(*result, new)) | |
192 | return 0; | |
d69dece5 CS |
193 | cp = kasprintf(GFP_KERNEL, "%s,%s", *result, new); |
194 | if (cp == NULL) | |
195 | return -ENOMEM; | |
196 | kfree(*result); | |
197 | *result = cp; | |
198 | } | |
199 | return 0; | |
200 | } | |
201 | ||
076c54c5 AD |
202 | /** |
203 | * security_module_enable - Load given security module on boot ? | |
b1d9e6b0 | 204 | * @module: the name of the module |
54f4b36b | 205 | * @stacked: indicates that the module wants to be stacked |
076c54c5 AD |
206 | * |
207 | * Each LSM must pass this method before registering its own operations | |
208 | * to avoid security registration races. This method may also be used | |
7cea51be | 209 | * to check if your LSM is currently loaded during kernel initialization. |
076c54c5 | 210 | * |
0e056eb5 MCC |
211 | * Returns: |
212 | * | |
213 | * true if: | |
214 | * | |
215 | * - The passed LSM is the one chosen by user at boot time, | |
216 | * - or the passed LSM is configured as the default and the user did not | |
217 | * choose an alternate LSM at boot time. | |
218 | * | |
076c54c5 AD |
219 | * Otherwise, return false. |
220 | */ | |
f9047a0c JJ |
221 | #ifdef CONFIG_SECURITY_STACKING |
222 | static bool __init cmp_lsms(const char *lsm) | |
223 | { | |
224 | const char *str = chosen_lsms; | |
225 | const char *split; | |
226 | int len = strlen(lsm); | |
227 | ||
228 | if (len > SECURITY_NAME_MAX) { | |
229 | pr_info("LSM: security module name '%s' exceeds limit\n", lsm); | |
230 | return false; | |
231 | } | |
232 | for (split = strchr(str, ','); split; split = strchr(str, ',')) { | |
233 | if ((len == split - str) && !strncmp(lsm, str, split - str)) | |
234 | return true; | |
235 | str = split + 1; | |
236 | } | |
237 | if ((len == strlen(str)) && !strncmp(lsm, str, strlen(str))) | |
238 | return true; | |
239 | return false; | |
240 | } | |
241 | #endif | |
242 | ||
54f4b36b | 243 | bool __init security_module_enable(const char *lsm, const bool stacked) |
076c54c5 | 244 | { |
54f4b36b CS |
245 | #ifdef CONFIG_SECURITY_STACKING |
246 | /* | |
247 | * Module defined on the command line security=XXXX | |
248 | */ | |
6a3b4b47 JJ |
249 | if (strcmp(chosen_lsms, MODULE_STACK)) { |
250 | if (cmp_lsms(lsm)) { | |
251 | /* set to first LSM registered and then override */ | |
252 | if (!*default_display_lsm) | |
253 | strcpy(default_display_lsm, lsm); | |
254 | else if (*chosen_display_lsm && !strcmp(chosen_display_lsm, lsm)) { | |
255 | strcpy(default_display_lsm, lsm); | |
256 | pr_info("LSM: default display lsm '%s'\n", default_display_lsm); | |
257 | } | |
258 | return true; | |
259 | } | |
260 | return false; | |
261 | } | |
54f4b36b CS |
262 | /* |
263 | * Module configured as stacked. | |
264 | */ | |
6a3b4b47 JJ |
265 | if (stacked && !*default_display_lsm) |
266 | strcpy(default_display_lsm, lsm); | |
267 | else if (stacked && *chosen_display_lsm && !strcmp(chosen_display_lsm, lsm)) { | |
268 | strcpy(default_display_lsm, lsm); | |
269 | pr_info("LSM: default display lsm '%s'\n", default_display_lsm); | |
270 | } | |
271 | ||
54f4b36b CS |
272 | return stacked; |
273 | #else | |
6a3b4b47 JJ |
274 | if (strcmp(lsm, chosen_lsms) == 0) { |
275 | strcpy(default_display_lsm, lsm); | |
54f4b36b | 276 | return true; |
6a3b4b47 | 277 | } |
54f4b36b CS |
278 | return false; |
279 | #endif | |
076c54c5 AD |
280 | } |
281 | ||
d0c8f0ad JJ |
282 | /* |
283 | * Keep the order of major modules for mapping secids. | |
284 | */ | |
285 | static int lsm_next_major; | |
286 | ||
d69dece5 CS |
287 | /** |
288 | * security_add_hooks - Add a modules hooks to the hook lists. | |
289 | * @hooks: the hooks to add | |
290 | * @count: the number of hooks to add | |
291 | * @lsm: the name of the security module | |
292 | * | |
293 | * Each LSM has to register its hooks with the infrastructure. | |
294 | */ | |
295 | void __init security_add_hooks(struct security_hook_list *hooks, int count, | |
296 | char *lsm) | |
297 | { | |
298 | int i; | |
d0c8f0ad JJ |
299 | int lsm_index = lsm_next_major++; |
300 | ||
301 | #ifdef CONFIG_SECURITY_LSM_DEBUG | |
302 | pr_info("LSM: Security module %s gets index %d\n", lsm, lsm_index); | |
303 | #endif | |
d69dece5 CS |
304 | for (i = 0; i < count; i++) { |
305 | hooks[i].lsm = lsm; | |
d0c8f0ad | 306 | hooks[i].lsm_index = lsm_index; |
d69dece5 CS |
307 | list_add_tail_rcu(&hooks[i].list, hooks[i].head); |
308 | } | |
309 | if (lsm_append(lsm, &lsm_names) < 0) | |
310 | panic("%s - Cannot get early memory.\n", __func__); | |
311 | } | |
312 | ||
8f408ab6 DJ |
313 | int call_lsm_notifier(enum lsm_event event, void *data) |
314 | { | |
315 | return atomic_notifier_call_chain(&lsm_notifier_chain, event, data); | |
316 | } | |
317 | EXPORT_SYMBOL(call_lsm_notifier); | |
318 | ||
319 | int register_lsm_notifier(struct notifier_block *nb) | |
320 | { | |
321 | return atomic_notifier_chain_register(&lsm_notifier_chain, nb); | |
322 | } | |
323 | EXPORT_SYMBOL(register_lsm_notifier); | |
324 | ||
325 | int unregister_lsm_notifier(struct notifier_block *nb) | |
326 | { | |
327 | return atomic_notifier_chain_unregister(&lsm_notifier_chain, nb); | |
328 | } | |
329 | EXPORT_SYMBOL(unregister_lsm_notifier); | |
330 | ||
f1efc8c4 CS |
331 | /** |
332 | * lsm_cred_alloc - allocate a composite cred blob | |
333 | * @cred: the cred that needs a blob | |
334 | * @gfp: allocation type | |
335 | * | |
336 | * Allocate the cred blob for all the modules | |
337 | * | |
338 | * Returns 0, or -ENOMEM if memory can't be allocated. | |
339 | */ | |
340 | int lsm_cred_alloc(struct cred *cred, gfp_t gfp) | |
341 | { | |
342 | if (blob_sizes.lbs_cred == 0) { | |
343 | cred->security = NULL; | |
344 | return 0; | |
345 | } | |
346 | ||
347 | cred->security = kzalloc(blob_sizes.lbs_cred, gfp); | |
348 | if (cred->security == NULL) | |
349 | return -ENOMEM; | |
350 | return 0; | |
351 | } | |
352 | ||
353 | /** | |
354 | * lsm_early_cred - during initialization allocate a composite cred blob | |
355 | * @cred: the cred that needs a blob | |
356 | * | |
357 | * Allocate the cred blob for all the modules if it's not already there | |
358 | */ | |
359 | void lsm_early_cred(struct cred *cred) | |
360 | { | |
361 | int rc; | |
362 | ||
363 | if (cred == NULL) | |
364 | panic("%s: NULL cred.\n", __func__); | |
365 | if (cred->security != NULL) | |
366 | return; | |
367 | rc = lsm_cred_alloc(cred, GFP_KERNEL); | |
368 | if (rc) | |
369 | panic("%s: Early cred alloc failed.\n", __func__); | |
370 | } | |
371 | ||
372 | static void __init lsm_set_size(int *need, int *lbs) | |
373 | { | |
374 | int offset; | |
375 | ||
376 | if (*need > 0) { | |
377 | offset = *lbs; | |
378 | *lbs += *need; | |
379 | *need = offset; | |
380 | } | |
381 | } | |
382 | ||
383 | /** | |
384 | * security_add_blobs - Report blob sizes | |
385 | * @needed: the size of blobs needed by the module | |
386 | * | |
387 | * Each LSM has to register its blobs with the infrastructure. | |
388 | * The "needed" data tells the infrastructure how much memory | |
389 | * the module requires for each of its blobs. On return the | |
390 | * structure is filled with the offset that module should use | |
391 | * from the blob pointer. | |
392 | */ | |
393 | void __init security_add_blobs(struct lsm_blob_sizes *needed) | |
394 | { | |
395 | lsm_set_size(&needed->lbs_cred, &blob_sizes.lbs_cred); | |
ab9b110b | 396 | lsm_set_size(&needed->lbs_file, &blob_sizes.lbs_file); |
7a90fc39 CS |
397 | lsm_set_size(&needed->lbs_ipc, &blob_sizes.lbs_ipc); |
398 | lsm_set_size(&needed->lbs_key, &blob_sizes.lbs_key); | |
399 | lsm_set_size(&needed->lbs_msg_msg, &blob_sizes.lbs_msg_msg); | |
400 | lsm_set_size(&needed->lbs_sock, &blob_sizes.lbs_sock); | |
401 | lsm_set_size(&needed->lbs_superblock, &blob_sizes.lbs_superblock); | |
7f79f508 | 402 | lsm_set_size(&needed->lbs_task, &blob_sizes.lbs_task); |
7a90fc39 CS |
403 | /* |
404 | * The inode blob gets an rcu_head in addition to | |
405 | * what the modules might need. | |
406 | */ | |
407 | if (needed->lbs_inode && blob_sizes.lbs_inode == 0) | |
408 | blob_sizes.lbs_inode = sizeof(struct rcu_head); | |
409 | lsm_set_size(&needed->lbs_inode, &blob_sizes.lbs_inode); | |
ab9b110b CS |
410 | } |
411 | ||
412 | /** | |
413 | * lsm_file_alloc - allocate a composite file blob | |
414 | * @file: the file that needs a blob | |
415 | * | |
416 | * Allocate the file blob for all the modules | |
417 | * | |
418 | * Returns 0, or -ENOMEM if memory can't be allocated. | |
419 | */ | |
420 | int lsm_file_alloc(struct file *file) | |
421 | { | |
422 | if (!lsm_file_cache) { | |
423 | file->f_security = NULL; | |
424 | return 0; | |
425 | } | |
426 | ||
427 | file->f_security = kmem_cache_zalloc(lsm_file_cache, GFP_KERNEL); | |
428 | if (file->f_security == NULL) | |
429 | return -ENOMEM; | |
430 | return 0; | |
f1efc8c4 CS |
431 | } |
432 | ||
a69a0684 JJ |
433 | #ifdef CONFIG_SECURITY_STACKING |
434 | static inline char *lsm_of_task(struct task_struct *task) | |
435 | { | |
436 | #ifdef CONFIG_SECURITY_LSM_DEBUG | |
437 | if (task->security == NULL) | |
438 | pr_info("%s: task has no lsm name.\n", __func__); | |
439 | #endif | |
440 | return task->security; | |
441 | } | |
442 | #endif | |
443 | ||
444 | #ifdef CONFIG_SECURITY_STACKING | |
445 | struct lsm_value { | |
446 | char *lsm; | |
447 | char *data; | |
448 | }; | |
449 | ||
450 | /** | |
451 | * lsm_parse_context - break a compound "context" into module data | |
452 | * @cxt: the initial data, which will be modified | |
453 | * @vlist: an array to receive the results | |
454 | * | |
455 | * Returns the number of entries, or -EINVAL if the cxt is unworkable. | |
456 | */ | |
457 | static int lsm_parse_context(char *cxt, struct lsm_value *vlist) | |
458 | { | |
459 | char *lsm; | |
460 | char *data; | |
461 | char *cp; | |
462 | int i; | |
463 | ||
464 | lsm = cxt; | |
465 | for (i = 0; i < LSM_MAX_MAJOR; i++) { | |
466 | data = strstr(lsm, "='"); | |
467 | if (!data) | |
468 | break; | |
469 | *data = '\0'; | |
470 | data += 2; | |
471 | cp = strchr(data, '\''); | |
472 | if (!cp) | |
473 | return -EINVAL; | |
474 | *cp++ = '\0'; | |
475 | vlist[i].lsm = lsm; | |
476 | vlist[i].data = data; | |
477 | if (*cp == '\0') { | |
478 | i++; | |
479 | break; | |
480 | } | |
481 | if (*cp == ',') | |
482 | cp++; | |
483 | else | |
484 | return -EINVAL; | |
485 | lsm = cp; | |
486 | } | |
487 | return i; | |
488 | } | |
489 | #endif /* CONFIG_SECURITY_STACKING */ | |
490 | ||
7f79f508 CS |
491 | /** |
492 | * lsm_task_alloc - allocate a composite task blob | |
493 | * @task: the task that needs a blob | |
494 | * | |
495 | * Allocate the task blob for all the modules | |
496 | * | |
497 | * Returns 0, or -ENOMEM if memory can't be allocated. | |
498 | */ | |
499 | int lsm_task_alloc(struct task_struct *task) | |
500 | { | |
501 | if (blob_sizes.lbs_task == 0) { | |
502 | task->security = NULL; | |
503 | return 0; | |
504 | } | |
505 | ||
506 | task->security = kzalloc(blob_sizes.lbs_task, GFP_KERNEL); | |
507 | if (task->security == NULL) | |
508 | return -ENOMEM; | |
76afa12e JJ |
509 | |
510 | /* inherit current display lsm */ | |
511 | #ifdef CONFIG_SECURITY_STACKING | |
512 | if (current->security) | |
513 | strcpy(task->security, lsm_of_task(current)); | |
6a3b4b47 JJ |
514 | else |
515 | strcpy(task->security, default_display_lsm); | |
76afa12e | 516 | #endif |
7f79f508 CS |
517 | return 0; |
518 | } | |
519 | ||
7a90fc39 CS |
520 | /** |
521 | * lsm_inode_alloc - allocate a composite inode blob | |
522 | * @inode: the inode that needs a blob | |
523 | * | |
524 | * Allocate the inode blob for all the modules | |
525 | * | |
526 | * Returns 0, or -ENOMEM if memory can't be allocated. | |
527 | */ | |
528 | int lsm_inode_alloc(struct inode *inode) | |
529 | { | |
530 | if (!lsm_inode_cache) { | |
531 | inode->i_security = NULL; | |
532 | return 0; | |
533 | } | |
534 | ||
535 | inode->i_security = kmem_cache_zalloc(lsm_inode_cache, GFP_KERNEL); | |
536 | if (inode->i_security == NULL) | |
537 | return -ENOMEM; | |
538 | return 0; | |
539 | } | |
540 | ||
541 | /** | |
542 | * lsm_early_inode - during initialization allocate a composite inode blob | |
543 | * @inode: the inode that needs a blob | |
544 | * | |
545 | * Allocate the inode blob for all the modules if it's not already there | |
546 | */ | |
547 | void lsm_early_inode(struct inode *inode) | |
548 | { | |
549 | int rc; | |
550 | ||
551 | if (inode == NULL) | |
552 | panic("%s: NULL inode.\n", __func__); | |
553 | if (inode->i_security != NULL) | |
554 | return; | |
555 | rc = lsm_inode_alloc(inode); | |
556 | if (rc) | |
557 | panic("%s: Early inode alloc failed.\n", __func__); | |
558 | } | |
559 | ||
560 | /** | |
561 | * lsm_ipc_alloc - allocate a composite ipc blob | |
562 | * @kip: the ipc that needs a blob | |
563 | * | |
564 | * Allocate the ipc blob for all the modules | |
565 | * | |
566 | * Returns 0, or -ENOMEM if memory can't be allocated. | |
567 | */ | |
568 | int lsm_ipc_alloc(struct kern_ipc_perm *kip) | |
569 | { | |
570 | if (blob_sizes.lbs_ipc == 0) { | |
571 | kip->security = NULL; | |
572 | return 0; | |
573 | } | |
574 | ||
575 | kip->security = kzalloc(blob_sizes.lbs_ipc, GFP_KERNEL); | |
576 | if (kip->security == NULL) | |
577 | return -ENOMEM; | |
578 | return 0; | |
579 | } | |
580 | ||
581 | #ifdef CONFIG_KEYS | |
582 | /** | |
583 | * lsm_key_alloc - allocate a composite key blob | |
584 | * @key: the key that needs a blob | |
585 | * | |
586 | * Allocate the key blob for all the modules | |
587 | * | |
588 | * Returns 0, or -ENOMEM if memory can't be allocated. | |
589 | */ | |
590 | int lsm_key_alloc(struct key *key) | |
591 | { | |
592 | if (blob_sizes.lbs_key == 0) { | |
593 | key->security = NULL; | |
594 | return 0; | |
595 | } | |
596 | ||
597 | key->security = kzalloc(blob_sizes.lbs_key, GFP_KERNEL); | |
598 | if (key->security == NULL) | |
599 | return -ENOMEM; | |
600 | return 0; | |
601 | } | |
602 | #endif /* CONFIG_KEYS */ | |
603 | ||
604 | /** | |
605 | * lsm_msg_msg_alloc - allocate a composite msg_msg blob | |
606 | * @mp: the msg_msg that needs a blob | |
607 | * | |
608 | * Allocate the ipc blob for all the modules | |
609 | * | |
610 | * Returns 0, or -ENOMEM if memory can't be allocated. | |
611 | */ | |
612 | int lsm_msg_msg_alloc(struct msg_msg *mp) | |
613 | { | |
614 | if (blob_sizes.lbs_msg_msg == 0) { | |
615 | mp->security = NULL; | |
616 | return 0; | |
617 | } | |
618 | ||
619 | mp->security = kzalloc(blob_sizes.lbs_msg_msg, GFP_KERNEL); | |
620 | if (mp->security == NULL) | |
621 | return -ENOMEM; | |
622 | return 0; | |
623 | } | |
624 | ||
625 | /** | |
626 | * lsm_sock_alloc - allocate a composite sock blob | |
627 | * @sock: the sock that needs a blob | |
628 | * @priority: allocation mode | |
629 | * | |
630 | * Allocate the sock blob for all the modules | |
631 | * | |
632 | * Returns 0, or -ENOMEM if memory can't be allocated. | |
633 | */ | |
634 | int lsm_sock_alloc(struct sock *sock, gfp_t priority) | |
635 | { | |
636 | if (blob_sizes.lbs_sock == 0) { | |
637 | sock->sk_security = NULL; | |
638 | return 0; | |
639 | } | |
640 | ||
641 | sock->sk_security = kzalloc(blob_sizes.lbs_sock, priority); | |
642 | if (sock->sk_security == NULL) | |
643 | return -ENOMEM; | |
644 | return 0; | |
645 | } | |
646 | ||
647 | /** | |
648 | * lsm_superblock_alloc - allocate a composite superblock blob | |
649 | * @sb: the superblock that needs a blob | |
650 | * | |
651 | * Allocate the superblock blob for all the modules | |
652 | * | |
653 | * Returns 0, or -ENOMEM if memory can't be allocated. | |
654 | */ | |
655 | int lsm_superblock_alloc(struct super_block *sb) | |
656 | { | |
657 | if (blob_sizes.lbs_superblock == 0) { | |
658 | sb->s_security = NULL; | |
659 | return 0; | |
660 | } | |
661 | ||
662 | sb->s_security = kzalloc(blob_sizes.lbs_superblock, GFP_KERNEL); | |
663 | if (sb->s_security == NULL) | |
664 | return -ENOMEM; | |
665 | return 0; | |
666 | } | |
667 | ||
f25fce3e | 668 | /* |
b1d9e6b0 | 669 | * Hook list operation macros. |
1da177e4 | 670 | * |
f25fce3e CS |
671 | * call_void_hook: |
672 | * This is a hook that does not return a value. | |
1da177e4 | 673 | * |
f25fce3e CS |
674 | * call_int_hook: |
675 | * This is a hook that returns a value. | |
1da177e4 | 676 | */ |
1da177e4 | 677 | |
b1d9e6b0 CS |
678 | #define call_void_hook(FUNC, ...) \ |
679 | do { \ | |
680 | struct security_hook_list *P; \ | |
681 | \ | |
682 | list_for_each_entry(P, &security_hook_heads.FUNC, list) \ | |
683 | P->hook.FUNC(__VA_ARGS__); \ | |
684 | } while (0) | |
685 | ||
686 | #define call_int_hook(FUNC, IRC, ...) ({ \ | |
687 | int RC = IRC; \ | |
688 | do { \ | |
689 | struct security_hook_list *P; \ | |
690 | \ | |
691 | list_for_each_entry(P, &security_hook_heads.FUNC, list) { \ | |
692 | RC = P->hook.FUNC(__VA_ARGS__); \ | |
693 | if (RC != 0) \ | |
694 | break; \ | |
695 | } \ | |
696 | } while (0); \ | |
697 | RC; \ | |
698 | }) | |
1da177e4 | 699 | |
20510f2f JM |
700 | /* Security operations */ |
701 | ||
79af7307 SS |
702 | int security_binder_set_context_mgr(struct task_struct *mgr) |
703 | { | |
f25fce3e | 704 | return call_int_hook(binder_set_context_mgr, 0, mgr); |
79af7307 SS |
705 | } |
706 | ||
707 | int security_binder_transaction(struct task_struct *from, | |
708 | struct task_struct *to) | |
709 | { | |
f25fce3e | 710 | return call_int_hook(binder_transaction, 0, from, to); |
79af7307 SS |
711 | } |
712 | ||
713 | int security_binder_transfer_binder(struct task_struct *from, | |
714 | struct task_struct *to) | |
715 | { | |
f25fce3e | 716 | return call_int_hook(binder_transfer_binder, 0, from, to); |
79af7307 SS |
717 | } |
718 | ||
719 | int security_binder_transfer_file(struct task_struct *from, | |
720 | struct task_struct *to, struct file *file) | |
721 | { | |
f25fce3e | 722 | return call_int_hook(binder_transfer_file, 0, from, to, file); |
79af7307 SS |
723 | } |
724 | ||
9e48858f | 725 | int security_ptrace_access_check(struct task_struct *child, unsigned int mode) |
20510f2f | 726 | { |
f25fce3e | 727 | return call_int_hook(ptrace_access_check, 0, child, mode); |
5cd9c58f DH |
728 | } |
729 | ||
730 | int security_ptrace_traceme(struct task_struct *parent) | |
731 | { | |
f25fce3e | 732 | return call_int_hook(ptrace_traceme, 0, parent); |
20510f2f JM |
733 | } |
734 | ||
735 | int security_capget(struct task_struct *target, | |
736 | kernel_cap_t *effective, | |
737 | kernel_cap_t *inheritable, | |
738 | kernel_cap_t *permitted) | |
739 | { | |
f25fce3e CS |
740 | return call_int_hook(capget, 0, target, |
741 | effective, inheritable, permitted); | |
20510f2f JM |
742 | } |
743 | ||
d84f4f99 DH |
744 | int security_capset(struct cred *new, const struct cred *old, |
745 | const kernel_cap_t *effective, | |
746 | const kernel_cap_t *inheritable, | |
747 | const kernel_cap_t *permitted) | |
20510f2f | 748 | { |
f25fce3e CS |
749 | return call_int_hook(capset, 0, new, old, |
750 | effective, inheritable, permitted); | |
20510f2f JM |
751 | } |
752 | ||
b7e724d3 | 753 | int security_capable(const struct cred *cred, struct user_namespace *ns, |
3486740a | 754 | int cap) |
20510f2f | 755 | { |
f25fce3e | 756 | return call_int_hook(capable, 0, cred, ns, cap, SECURITY_CAP_AUDIT); |
06112163 EP |
757 | } |
758 | ||
c7eba4a9 EP |
759 | int security_capable_noaudit(const struct cred *cred, struct user_namespace *ns, |
760 | int cap) | |
06112163 | 761 | { |
f25fce3e | 762 | return call_int_hook(capable, 0, cred, ns, cap, SECURITY_CAP_NOAUDIT); |
20510f2f JM |
763 | } |
764 | ||
20510f2f JM |
765 | int security_quotactl(int cmds, int type, int id, struct super_block *sb) |
766 | { | |
f25fce3e | 767 | return call_int_hook(quotactl, 0, cmds, type, id, sb); |
20510f2f JM |
768 | } |
769 | ||
770 | int security_quota_on(struct dentry *dentry) | |
771 | { | |
f25fce3e | 772 | return call_int_hook(quota_on, 0, dentry); |
20510f2f JM |
773 | } |
774 | ||
12b3052c | 775 | int security_syslog(int type) |
20510f2f | 776 | { |
f25fce3e | 777 | return call_int_hook(syslog, 0, type); |
20510f2f JM |
778 | } |
779 | ||
457db29b | 780 | int security_settime64(const struct timespec64 *ts, const struct timezone *tz) |
20510f2f | 781 | { |
f25fce3e | 782 | return call_int_hook(settime, 0, ts, tz); |
20510f2f JM |
783 | } |
784 | ||
20510f2f JM |
785 | int security_vm_enough_memory_mm(struct mm_struct *mm, long pages) |
786 | { | |
b1d9e6b0 CS |
787 | struct security_hook_list *hp; |
788 | int cap_sys_admin = 1; | |
789 | int rc; | |
790 | ||
791 | /* | |
792 | * The module will respond with a positive value if | |
793 | * it thinks the __vm_enough_memory() call should be | |
794 | * made with the cap_sys_admin set. If all of the modules | |
795 | * agree that it should be set it will. If any module | |
796 | * thinks it should not be set it won't. | |
797 | */ | |
798 | list_for_each_entry(hp, &security_hook_heads.vm_enough_memory, list) { | |
799 | rc = hp->hook.vm_enough_memory(mm, pages); | |
800 | if (rc <= 0) { | |
801 | cap_sys_admin = 0; | |
802 | break; | |
803 | } | |
804 | } | |
805 | return __vm_enough_memory(mm, pages, cap_sys_admin); | |
20510f2f JM |
806 | } |
807 | ||
a6f76f23 | 808 | int security_bprm_set_creds(struct linux_binprm *bprm) |
20510f2f | 809 | { |
f25fce3e | 810 | return call_int_hook(bprm_set_creds, 0, bprm); |
20510f2f JM |
811 | } |
812 | ||
a6f76f23 | 813 | int security_bprm_check(struct linux_binprm *bprm) |
20510f2f | 814 | { |
6c21a7fb MZ |
815 | int ret; |
816 | ||
f25fce3e | 817 | ret = call_int_hook(bprm_check_security, 0, bprm); |
6c21a7fb MZ |
818 | if (ret) |
819 | return ret; | |
820 | return ima_bprm_check(bprm); | |
20510f2f JM |
821 | } |
822 | ||
a6f76f23 | 823 | void security_bprm_committing_creds(struct linux_binprm *bprm) |
20510f2f | 824 | { |
f25fce3e | 825 | call_void_hook(bprm_committing_creds, bprm); |
20510f2f JM |
826 | } |
827 | ||
a6f76f23 | 828 | void security_bprm_committed_creds(struct linux_binprm *bprm) |
20510f2f | 829 | { |
f25fce3e | 830 | call_void_hook(bprm_committed_creds, bprm); |
20510f2f JM |
831 | } |
832 | ||
20510f2f JM |
833 | int security_sb_alloc(struct super_block *sb) |
834 | { | |
7a90fc39 CS |
835 | int rc = lsm_superblock_alloc(sb); |
836 | ||
837 | if (unlikely(rc)) | |
838 | return rc; | |
839 | rc = call_int_hook(sb_alloc_security, 0, sb); | |
840 | if (unlikely(rc)) | |
841 | security_sb_free(sb); | |
842 | return rc; | |
20510f2f JM |
843 | } |
844 | ||
845 | void security_sb_free(struct super_block *sb) | |
846 | { | |
f25fce3e | 847 | call_void_hook(sb_free_security, sb); |
7a90fc39 CS |
848 | kfree(sb->s_security); |
849 | sb->s_security = NULL; | |
20510f2f JM |
850 | } |
851 | ||
e0007529 | 852 | int security_sb_copy_data(char *orig, char *copy) |
20510f2f | 853 | { |
f25fce3e | 854 | return call_int_hook(sb_copy_data, 0, orig, copy); |
20510f2f | 855 | } |
e0007529 | 856 | EXPORT_SYMBOL(security_sb_copy_data); |
20510f2f | 857 | |
ff36fe2c EP |
858 | int security_sb_remount(struct super_block *sb, void *data) |
859 | { | |
f25fce3e | 860 | return call_int_hook(sb_remount, 0, sb, data); |
ff36fe2c EP |
861 | } |
862 | ||
12204e24 | 863 | int security_sb_kern_mount(struct super_block *sb, int flags, void *data) |
20510f2f | 864 | { |
f25fce3e | 865 | return call_int_hook(sb_kern_mount, 0, sb, flags, data); |
20510f2f JM |
866 | } |
867 | ||
2069f457 EP |
868 | int security_sb_show_options(struct seq_file *m, struct super_block *sb) |
869 | { | |
f25fce3e | 870 | return call_int_hook(sb_show_options, 0, m, sb); |
2069f457 EP |
871 | } |
872 | ||
20510f2f JM |
873 | int security_sb_statfs(struct dentry *dentry) |
874 | { | |
f25fce3e | 875 | return call_int_hook(sb_statfs, 0, dentry); |
20510f2f JM |
876 | } |
877 | ||
8a04c43b | 878 | int security_sb_mount(const char *dev_name, const struct path *path, |
808d4e3c | 879 | const char *type, unsigned long flags, void *data) |
20510f2f | 880 | { |
f25fce3e | 881 | return call_int_hook(sb_mount, 0, dev_name, path, type, flags, data); |
20510f2f JM |
882 | } |
883 | ||
20510f2f JM |
884 | int security_sb_umount(struct vfsmount *mnt, int flags) |
885 | { | |
f25fce3e | 886 | return call_int_hook(sb_umount, 0, mnt, flags); |
20510f2f JM |
887 | } |
888 | ||
3b73b68c | 889 | int security_sb_pivotroot(const struct path *old_path, const struct path *new_path) |
20510f2f | 890 | { |
f25fce3e | 891 | return call_int_hook(sb_pivotroot, 0, old_path, new_path); |
20510f2f JM |
892 | } |
893 | ||
c9180a57 | 894 | int security_sb_set_mnt_opts(struct super_block *sb, |
649f6e77 DQ |
895 | struct security_mnt_opts *opts, |
896 | unsigned long kern_flags, | |
897 | unsigned long *set_kern_flags) | |
c9180a57 | 898 | { |
b1d9e6b0 CS |
899 | return call_int_hook(sb_set_mnt_opts, |
900 | opts->num_mnt_opts ? -EOPNOTSUPP : 0, sb, | |
901 | opts, kern_flags, set_kern_flags); | |
c9180a57 | 902 | } |
e0007529 | 903 | EXPORT_SYMBOL(security_sb_set_mnt_opts); |
c9180a57 | 904 | |
094f7b69 | 905 | int security_sb_clone_mnt_opts(const struct super_block *oldsb, |
0b4d3452 SM |
906 | struct super_block *newsb, |
907 | unsigned long kern_flags, | |
908 | unsigned long *set_kern_flags) | |
c9180a57 | 909 | { |
0b4d3452 SM |
910 | return call_int_hook(sb_clone_mnt_opts, 0, oldsb, newsb, |
911 | kern_flags, set_kern_flags); | |
c9180a57 | 912 | } |
e0007529 EP |
913 | EXPORT_SYMBOL(security_sb_clone_mnt_opts); |
914 | ||
915 | int security_sb_parse_opts_str(char *options, struct security_mnt_opts *opts) | |
916 | { | |
f25fce3e | 917 | return call_int_hook(sb_parse_opts_str, 0, options, opts); |
e0007529 EP |
918 | } |
919 | EXPORT_SYMBOL(security_sb_parse_opts_str); | |
c9180a57 | 920 | |
20510f2f JM |
921 | int security_inode_alloc(struct inode *inode) |
922 | { | |
7a90fc39 CS |
923 | int rc = lsm_inode_alloc(inode); |
924 | ||
925 | if (unlikely(rc)) | |
926 | return rc; | |
927 | rc = call_int_hook(inode_alloc_security, 0, inode); | |
928 | if (unlikely(rc)) | |
929 | security_inode_free(inode); | |
930 | return rc; | |
931 | } | |
932 | ||
933 | static void inode_free_by_rcu(struct rcu_head *head) | |
934 | { | |
935 | /* | |
936 | * The rcu head is at the start of the inode blob | |
937 | */ | |
938 | kmem_cache_free(lsm_inode_cache, head); | |
20510f2f JM |
939 | } |
940 | ||
941 | void security_inode_free(struct inode *inode) | |
942 | { | |
f381c272 | 943 | integrity_inode_free(inode); |
f25fce3e | 944 | call_void_hook(inode_free_security, inode); |
7a90fc39 CS |
945 | /* |
946 | * The inode may still be referenced in a path walk and | |
947 | * a call to security_inode_permission() can be made | |
948 | * after inode_free_security() is called. Ideally, the VFS | |
949 | * wouldn't do this, but fixing that is a much harder | |
950 | * job. For now, simply free the i_security via RCU, and | |
951 | * leave the current inode->i_security pointer intact. | |
952 | * The inode will be freed after the RCU grace period too. | |
953 | */ | |
954 | if (inode->i_security) | |
955 | call_rcu((struct rcu_head *)inode->i_security, | |
956 | inode_free_by_rcu); | |
20510f2f JM |
957 | } |
958 | ||
d47be3df | 959 | int security_dentry_init_security(struct dentry *dentry, int mode, |
4f3ccd76 | 960 | const struct qstr *name, void **ctx, |
d47be3df DQ |
961 | u32 *ctxlen) |
962 | { | |
b1d9e6b0 CS |
963 | return call_int_hook(dentry_init_security, -EOPNOTSUPP, dentry, mode, |
964 | name, ctx, ctxlen); | |
d47be3df DQ |
965 | } |
966 | EXPORT_SYMBOL(security_dentry_init_security); | |
967 | ||
2602625b VG |
968 | int security_dentry_create_files_as(struct dentry *dentry, int mode, |
969 | struct qstr *name, | |
970 | const struct cred *old, struct cred *new) | |
971 | { | |
972 | return call_int_hook(dentry_create_files_as, 0, dentry, mode, | |
973 | name, old, new); | |
974 | } | |
975 | EXPORT_SYMBOL(security_dentry_create_files_as); | |
976 | ||
20510f2f | 977 | int security_inode_init_security(struct inode *inode, struct inode *dir, |
9d8f13ba MZ |
978 | const struct qstr *qstr, |
979 | const initxattrs initxattrs, void *fs_data) | |
20510f2f | 980 | { |
823eb1cc MZ |
981 | struct xattr new_xattrs[MAX_LSM_EVM_XATTR + 1]; |
982 | struct xattr *lsm_xattr, *evm_xattr, *xattr; | |
9d8f13ba MZ |
983 | int ret; |
984 | ||
20510f2f | 985 | if (unlikely(IS_PRIVATE(inode))) |
fb88c2b6 | 986 | return 0; |
9d8f13ba | 987 | |
9d8f13ba | 988 | if (!initxattrs) |
e308fd3b JB |
989 | return call_int_hook(inode_init_security, -EOPNOTSUPP, inode, |
990 | dir, qstr, NULL, NULL, NULL); | |
9548906b | 991 | memset(new_xattrs, 0, sizeof(new_xattrs)); |
9d8f13ba | 992 | lsm_xattr = new_xattrs; |
b1d9e6b0 | 993 | ret = call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir, qstr, |
9d8f13ba MZ |
994 | &lsm_xattr->name, |
995 | &lsm_xattr->value, | |
996 | &lsm_xattr->value_len); | |
997 | if (ret) | |
998 | goto out; | |
823eb1cc MZ |
999 | |
1000 | evm_xattr = lsm_xattr + 1; | |
1001 | ret = evm_inode_init_security(inode, lsm_xattr, evm_xattr); | |
1002 | if (ret) | |
1003 | goto out; | |
9d8f13ba MZ |
1004 | ret = initxattrs(inode, new_xattrs, fs_data); |
1005 | out: | |
9548906b | 1006 | for (xattr = new_xattrs; xattr->value != NULL; xattr++) |
823eb1cc | 1007 | kfree(xattr->value); |
9d8f13ba MZ |
1008 | return (ret == -EOPNOTSUPP) ? 0 : ret; |
1009 | } | |
1010 | EXPORT_SYMBOL(security_inode_init_security); | |
1011 | ||
1012 | int security_old_inode_init_security(struct inode *inode, struct inode *dir, | |
9548906b | 1013 | const struct qstr *qstr, const char **name, |
9d8f13ba | 1014 | void **value, size_t *len) |
20510f2f JM |
1015 | { |
1016 | if (unlikely(IS_PRIVATE(inode))) | |
30e05324 | 1017 | return -EOPNOTSUPP; |
e308fd3b JB |
1018 | return call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir, |
1019 | qstr, name, value, len); | |
20510f2f | 1020 | } |
9d8f13ba | 1021 | EXPORT_SYMBOL(security_old_inode_init_security); |
20510f2f | 1022 | |
be6d3e56 | 1023 | #ifdef CONFIG_SECURITY_PATH |
d3607752 | 1024 | int security_path_mknod(const struct path *dir, struct dentry *dentry, umode_t mode, |
be6d3e56 KT |
1025 | unsigned int dev) |
1026 | { | |
c6f493d6 | 1027 | if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) |
be6d3e56 | 1028 | return 0; |
f25fce3e | 1029 | return call_int_hook(path_mknod, 0, dir, dentry, mode, dev); |
be6d3e56 KT |
1030 | } |
1031 | EXPORT_SYMBOL(security_path_mknod); | |
1032 | ||
d3607752 | 1033 | int security_path_mkdir(const struct path *dir, struct dentry *dentry, umode_t mode) |
be6d3e56 | 1034 | { |
c6f493d6 | 1035 | if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) |
be6d3e56 | 1036 | return 0; |
f25fce3e | 1037 | return call_int_hook(path_mkdir, 0, dir, dentry, mode); |
be6d3e56 | 1038 | } |
82140443 | 1039 | EXPORT_SYMBOL(security_path_mkdir); |
be6d3e56 | 1040 | |
989f74e0 | 1041 | int security_path_rmdir(const struct path *dir, struct dentry *dentry) |
be6d3e56 | 1042 | { |
c6f493d6 | 1043 | if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) |
be6d3e56 | 1044 | return 0; |
f25fce3e | 1045 | return call_int_hook(path_rmdir, 0, dir, dentry); |
be6d3e56 | 1046 | } |
c088e31d | 1047 | EXPORT_SYMBOL_GPL(security_path_rmdir); |
be6d3e56 | 1048 | |
989f74e0 | 1049 | int security_path_unlink(const struct path *dir, struct dentry *dentry) |
be6d3e56 | 1050 | { |
c6f493d6 | 1051 | if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) |
be6d3e56 | 1052 | return 0; |
f25fce3e | 1053 | return call_int_hook(path_unlink, 0, dir, dentry); |
be6d3e56 | 1054 | } |
82140443 | 1055 | EXPORT_SYMBOL(security_path_unlink); |
be6d3e56 | 1056 | |
d3607752 | 1057 | int security_path_symlink(const struct path *dir, struct dentry *dentry, |
be6d3e56 KT |
1058 | const char *old_name) |
1059 | { | |
c6f493d6 | 1060 | if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) |
be6d3e56 | 1061 | return 0; |
f25fce3e | 1062 | return call_int_hook(path_symlink, 0, dir, dentry, old_name); |
be6d3e56 | 1063 | } |
c088e31d | 1064 | EXPORT_SYMBOL_GPL(security_path_symlink); |
be6d3e56 | 1065 | |
3ccee46a | 1066 | int security_path_link(struct dentry *old_dentry, const struct path *new_dir, |
be6d3e56 KT |
1067 | struct dentry *new_dentry) |
1068 | { | |
c6f493d6 | 1069 | if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)))) |
be6d3e56 | 1070 | return 0; |
f25fce3e | 1071 | return call_int_hook(path_link, 0, old_dentry, new_dir, new_dentry); |
be6d3e56 | 1072 | } |
c088e31d | 1073 | EXPORT_SYMBOL_GPL(security_path_link); |
be6d3e56 | 1074 | |
3ccee46a AV |
1075 | int security_path_rename(const struct path *old_dir, struct dentry *old_dentry, |
1076 | const struct path *new_dir, struct dentry *new_dentry, | |
0b3974eb | 1077 | unsigned int flags) |
be6d3e56 | 1078 | { |
c6f493d6 DH |
1079 | if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) || |
1080 | (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry))))) | |
be6d3e56 | 1081 | return 0; |
da1ce067 MS |
1082 | |
1083 | if (flags & RENAME_EXCHANGE) { | |
f25fce3e CS |
1084 | int err = call_int_hook(path_rename, 0, new_dir, new_dentry, |
1085 | old_dir, old_dentry); | |
da1ce067 MS |
1086 | if (err) |
1087 | return err; | |
1088 | } | |
1089 | ||
f25fce3e CS |
1090 | return call_int_hook(path_rename, 0, old_dir, old_dentry, new_dir, |
1091 | new_dentry); | |
be6d3e56 | 1092 | } |
82140443 | 1093 | EXPORT_SYMBOL(security_path_rename); |
be6d3e56 | 1094 | |
81f4c506 | 1095 | int security_path_truncate(const struct path *path) |
be6d3e56 | 1096 | { |
c6f493d6 | 1097 | if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) |
be6d3e56 | 1098 | return 0; |
f25fce3e | 1099 | return call_int_hook(path_truncate, 0, path); |
be6d3e56 | 1100 | } |
c088e31d | 1101 | EXPORT_SYMBOL_GPL(security_path_truncate); |
89eda068 | 1102 | |
be01f9f2 | 1103 | int security_path_chmod(const struct path *path, umode_t mode) |
89eda068 | 1104 | { |
c6f493d6 | 1105 | if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) |
89eda068 | 1106 | return 0; |
f25fce3e | 1107 | return call_int_hook(path_chmod, 0, path, mode); |
89eda068 | 1108 | } |
c088e31d | 1109 | EXPORT_SYMBOL_GPL(security_path_chmod); |
89eda068 | 1110 | |
7fd25dac | 1111 | int security_path_chown(const struct path *path, kuid_t uid, kgid_t gid) |
89eda068 | 1112 | { |
c6f493d6 | 1113 | if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) |
89eda068 | 1114 | return 0; |
f25fce3e | 1115 | return call_int_hook(path_chown, 0, path, uid, gid); |
89eda068 | 1116 | } |
c088e31d | 1117 | EXPORT_SYMBOL_GPL(security_path_chown); |
8b8efb44 | 1118 | |
77b286c0 | 1119 | int security_path_chroot(const struct path *path) |
8b8efb44 | 1120 | { |
f25fce3e | 1121 | return call_int_hook(path_chroot, 0, path); |
8b8efb44 | 1122 | } |
be6d3e56 KT |
1123 | #endif |
1124 | ||
4acdaf27 | 1125 | int security_inode_create(struct inode *dir, struct dentry *dentry, umode_t mode) |
20510f2f JM |
1126 | { |
1127 | if (unlikely(IS_PRIVATE(dir))) | |
1128 | return 0; | |
f25fce3e | 1129 | return call_int_hook(inode_create, 0, dir, dentry, mode); |
20510f2f | 1130 | } |
800a9647 | 1131 | EXPORT_SYMBOL_GPL(security_inode_create); |
20510f2f JM |
1132 | |
1133 | int security_inode_link(struct dentry *old_dentry, struct inode *dir, | |
1134 | struct dentry *new_dentry) | |
1135 | { | |
c6f493d6 | 1136 | if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)))) |
20510f2f | 1137 | return 0; |
f25fce3e | 1138 | return call_int_hook(inode_link, 0, old_dentry, dir, new_dentry); |
20510f2f JM |
1139 | } |
1140 | ||
1141 | int security_inode_unlink(struct inode *dir, struct dentry *dentry) | |
1142 | { | |
c6f493d6 | 1143 | if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) |
20510f2f | 1144 | return 0; |
f25fce3e | 1145 | return call_int_hook(inode_unlink, 0, dir, dentry); |
20510f2f JM |
1146 | } |
1147 | ||
1148 | int security_inode_symlink(struct inode *dir, struct dentry *dentry, | |
1149 | const char *old_name) | |
1150 | { | |
1151 | if (unlikely(IS_PRIVATE(dir))) | |
1152 | return 0; | |
f25fce3e | 1153 | return call_int_hook(inode_symlink, 0, dir, dentry, old_name); |
20510f2f JM |
1154 | } |
1155 | ||
18bb1db3 | 1156 | int security_inode_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
20510f2f JM |
1157 | { |
1158 | if (unlikely(IS_PRIVATE(dir))) | |
1159 | return 0; | |
f25fce3e | 1160 | return call_int_hook(inode_mkdir, 0, dir, dentry, mode); |
20510f2f | 1161 | } |
800a9647 | 1162 | EXPORT_SYMBOL_GPL(security_inode_mkdir); |
20510f2f JM |
1163 | |
1164 | int security_inode_rmdir(struct inode *dir, struct dentry *dentry) | |
1165 | { | |
c6f493d6 | 1166 | if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) |
20510f2f | 1167 | return 0; |
f25fce3e | 1168 | return call_int_hook(inode_rmdir, 0, dir, dentry); |
20510f2f JM |
1169 | } |
1170 | ||
1a67aafb | 1171 | int security_inode_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev) |
20510f2f JM |
1172 | { |
1173 | if (unlikely(IS_PRIVATE(dir))) | |
1174 | return 0; | |
f25fce3e | 1175 | return call_int_hook(inode_mknod, 0, dir, dentry, mode, dev); |
20510f2f JM |
1176 | } |
1177 | ||
1178 | int security_inode_rename(struct inode *old_dir, struct dentry *old_dentry, | |
0b3974eb MS |
1179 | struct inode *new_dir, struct dentry *new_dentry, |
1180 | unsigned int flags) | |
20510f2f | 1181 | { |
c6f493d6 DH |
1182 | if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) || |
1183 | (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry))))) | |
20510f2f | 1184 | return 0; |
da1ce067 MS |
1185 | |
1186 | if (flags & RENAME_EXCHANGE) { | |
f25fce3e | 1187 | int err = call_int_hook(inode_rename, 0, new_dir, new_dentry, |
da1ce067 MS |
1188 | old_dir, old_dentry); |
1189 | if (err) | |
1190 | return err; | |
1191 | } | |
1192 | ||
f25fce3e | 1193 | return call_int_hook(inode_rename, 0, old_dir, old_dentry, |
20510f2f JM |
1194 | new_dir, new_dentry); |
1195 | } | |
1196 | ||
1197 | int security_inode_readlink(struct dentry *dentry) | |
1198 | { | |
c6f493d6 | 1199 | if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) |
20510f2f | 1200 | return 0; |
f25fce3e | 1201 | return call_int_hook(inode_readlink, 0, dentry); |
20510f2f | 1202 | } |
c088e31d | 1203 | EXPORT_SYMBOL_GPL(security_inode_readlink); |
20510f2f | 1204 | |
bda0be7a N |
1205 | int security_inode_follow_link(struct dentry *dentry, struct inode *inode, |
1206 | bool rcu) | |
20510f2f | 1207 | { |
bda0be7a | 1208 | if (unlikely(IS_PRIVATE(inode))) |
20510f2f | 1209 | return 0; |
e22619a2 | 1210 | return call_int_hook(inode_follow_link, 0, dentry, inode, rcu); |
20510f2f JM |
1211 | } |
1212 | ||
b77b0646 | 1213 | int security_inode_permission(struct inode *inode, int mask) |
20510f2f JM |
1214 | { |
1215 | if (unlikely(IS_PRIVATE(inode))) | |
1216 | return 0; | |
f25fce3e | 1217 | return call_int_hook(inode_permission, 0, inode, mask); |
20510f2f | 1218 | } |
c088e31d | 1219 | EXPORT_SYMBOL_GPL(security_inode_permission); |
20510f2f JM |
1220 | |
1221 | int security_inode_setattr(struct dentry *dentry, struct iattr *attr) | |
1222 | { | |
817b54aa MZ |
1223 | int ret; |
1224 | ||
c6f493d6 | 1225 | if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) |
20510f2f | 1226 | return 0; |
f25fce3e | 1227 | ret = call_int_hook(inode_setattr, 0, dentry, attr); |
817b54aa MZ |
1228 | if (ret) |
1229 | return ret; | |
1230 | return evm_inode_setattr(dentry, attr); | |
20510f2f | 1231 | } |
b1da47e2 | 1232 | EXPORT_SYMBOL_GPL(security_inode_setattr); |
20510f2f | 1233 | |
3f7036a0 | 1234 | int security_inode_getattr(const struct path *path) |
20510f2f | 1235 | { |
c6f493d6 | 1236 | if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) |
20510f2f | 1237 | return 0; |
f25fce3e | 1238 | return call_int_hook(inode_getattr, 0, path); |
20510f2f JM |
1239 | } |
1240 | ||
8f0cfa52 DH |
1241 | int security_inode_setxattr(struct dentry *dentry, const char *name, |
1242 | const void *value, size_t size, int flags) | |
20510f2f | 1243 | { |
3e1be52d MZ |
1244 | int ret; |
1245 | ||
c6f493d6 | 1246 | if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) |
20510f2f | 1247 | return 0; |
b1d9e6b0 CS |
1248 | /* |
1249 | * SELinux and Smack integrate the cap call, | |
1250 | * so assume that all LSMs supplying this call do so. | |
1251 | */ | |
1252 | ret = call_int_hook(inode_setxattr, 1, dentry, name, value, size, | |
f25fce3e | 1253 | flags); |
b1d9e6b0 CS |
1254 | |
1255 | if (ret == 1) | |
1256 | ret = cap_inode_setxattr(dentry, name, value, size, flags); | |
42c63330 MZ |
1257 | if (ret) |
1258 | return ret; | |
1259 | ret = ima_inode_setxattr(dentry, name, value, size); | |
3e1be52d MZ |
1260 | if (ret) |
1261 | return ret; | |
1262 | return evm_inode_setxattr(dentry, name, value, size); | |
20510f2f JM |
1263 | } |
1264 | ||
8f0cfa52 DH |
1265 | void security_inode_post_setxattr(struct dentry *dentry, const char *name, |
1266 | const void *value, size_t size, int flags) | |
20510f2f | 1267 | { |
c6f493d6 | 1268 | if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) |
20510f2f | 1269 | return; |
f25fce3e | 1270 | call_void_hook(inode_post_setxattr, dentry, name, value, size, flags); |
3e1be52d | 1271 | evm_inode_post_setxattr(dentry, name, value, size); |
20510f2f JM |
1272 | } |
1273 | ||
8f0cfa52 | 1274 | int security_inode_getxattr(struct dentry *dentry, const char *name) |
20510f2f | 1275 | { |
c6f493d6 | 1276 | if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) |
20510f2f | 1277 | return 0; |
f25fce3e | 1278 | return call_int_hook(inode_getxattr, 0, dentry, name); |
20510f2f JM |
1279 | } |
1280 | ||
1281 | int security_inode_listxattr(struct dentry *dentry) | |
1282 | { | |
c6f493d6 | 1283 | if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) |
20510f2f | 1284 | return 0; |
f25fce3e | 1285 | return call_int_hook(inode_listxattr, 0, dentry); |
20510f2f JM |
1286 | } |
1287 | ||
8f0cfa52 | 1288 | int security_inode_removexattr(struct dentry *dentry, const char *name) |
20510f2f | 1289 | { |
3e1be52d MZ |
1290 | int ret; |
1291 | ||
c6f493d6 | 1292 | if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) |
20510f2f | 1293 | return 0; |
b1d9e6b0 CS |
1294 | /* |
1295 | * SELinux and Smack integrate the cap call, | |
1296 | * so assume that all LSMs supplying this call do so. | |
1297 | */ | |
1298 | ret = call_int_hook(inode_removexattr, 1, dentry, name); | |
1299 | if (ret == 1) | |
1300 | ret = cap_inode_removexattr(dentry, name); | |
42c63330 MZ |
1301 | if (ret) |
1302 | return ret; | |
1303 | ret = ima_inode_removexattr(dentry, name); | |
3e1be52d MZ |
1304 | if (ret) |
1305 | return ret; | |
1306 | return evm_inode_removexattr(dentry, name); | |
20510f2f JM |
1307 | } |
1308 | ||
b5376771 SH |
1309 | int security_inode_need_killpriv(struct dentry *dentry) |
1310 | { | |
f25fce3e | 1311 | return call_int_hook(inode_need_killpriv, 0, dentry); |
b5376771 SH |
1312 | } |
1313 | ||
1314 | int security_inode_killpriv(struct dentry *dentry) | |
1315 | { | |
f25fce3e | 1316 | return call_int_hook(inode_killpriv, 0, dentry); |
b5376771 SH |
1317 | } |
1318 | ||
ea861dfd | 1319 | int security_inode_getsecurity(struct inode *inode, const char *name, void **buffer, bool alloc) |
20510f2f | 1320 | { |
2885c1e3 CS |
1321 | struct security_hook_list *hp; |
1322 | int rc; | |
1323 | ||
20510f2f | 1324 | if (unlikely(IS_PRIVATE(inode))) |
8d952504 | 1325 | return -EOPNOTSUPP; |
2885c1e3 CS |
1326 | /* |
1327 | * Only one module will provide an attribute with a given name. | |
1328 | */ | |
1329 | list_for_each_entry(hp, &security_hook_heads.inode_getsecurity, list) { | |
1330 | rc = hp->hook.inode_getsecurity(inode, name, buffer, alloc); | |
1331 | if (rc != -EOPNOTSUPP) | |
1332 | return rc; | |
1333 | } | |
1334 | return -EOPNOTSUPP; | |
20510f2f JM |
1335 | } |
1336 | ||
1337 | int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags) | |
1338 | { | |
2885c1e3 CS |
1339 | struct security_hook_list *hp; |
1340 | int rc; | |
1341 | ||
20510f2f | 1342 | if (unlikely(IS_PRIVATE(inode))) |
8d952504 | 1343 | return -EOPNOTSUPP; |
2885c1e3 CS |
1344 | /* |
1345 | * Only one module will provide an attribute with a given name. | |
1346 | */ | |
1347 | list_for_each_entry(hp, &security_hook_heads.inode_setsecurity, list) { | |
1348 | rc = hp->hook.inode_setsecurity(inode, name, value, size, | |
1349 | flags); | |
1350 | if (rc != -EOPNOTSUPP) | |
1351 | return rc; | |
1352 | } | |
1353 | return -EOPNOTSUPP; | |
20510f2f JM |
1354 | } |
1355 | ||
1356 | int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size) | |
1357 | { | |
1358 | if (unlikely(IS_PRIVATE(inode))) | |
1359 | return 0; | |
f25fce3e | 1360 | return call_int_hook(inode_listsecurity, 0, inode, buffer, buffer_size); |
20510f2f | 1361 | } |
c9bccef6 | 1362 | EXPORT_SYMBOL(security_inode_listsecurity); |
20510f2f | 1363 | |
d6335d77 | 1364 | void security_inode_getsecid(struct inode *inode, u32 *secid) |
8a076191 | 1365 | { |
f25fce3e | 1366 | call_void_hook(inode_getsecid, inode, secid); |
8a076191 AD |
1367 | } |
1368 | ||
d8ad8b49 VG |
1369 | int security_inode_copy_up(struct dentry *src, struct cred **new) |
1370 | { | |
1371 | return call_int_hook(inode_copy_up, 0, src, new); | |
1372 | } | |
1373 | EXPORT_SYMBOL(security_inode_copy_up); | |
1374 | ||
121ab822 VG |
1375 | int security_inode_copy_up_xattr(const char *name) |
1376 | { | |
1377 | return call_int_hook(inode_copy_up_xattr, -EOPNOTSUPP, name); | |
1378 | } | |
1379 | EXPORT_SYMBOL(security_inode_copy_up_xattr); | |
1380 | ||
20510f2f JM |
1381 | int security_file_permission(struct file *file, int mask) |
1382 | { | |
c4ec54b4 EP |
1383 | int ret; |
1384 | ||
f25fce3e | 1385 | ret = call_int_hook(file_permission, 0, file, mask); |
c4ec54b4 EP |
1386 | if (ret) |
1387 | return ret; | |
1388 | ||
1389 | return fsnotify_perm(file, mask); | |
20510f2f | 1390 | } |
c088e31d | 1391 | EXPORT_SYMBOL_GPL(security_file_permission); |
20510f2f JM |
1392 | |
1393 | int security_file_alloc(struct file *file) | |
1394 | { | |
ab9b110b CS |
1395 | int rc = lsm_file_alloc(file); |
1396 | ||
7a90fc39 | 1397 | if (unlikely(rc)) |
ab9b110b CS |
1398 | return rc; |
1399 | rc = call_int_hook(file_alloc_security, 0, file); | |
1400 | if (unlikely(rc)) | |
1401 | security_file_free(file); | |
1402 | return rc; | |
20510f2f JM |
1403 | } |
1404 | ||
1405 | void security_file_free(struct file *file) | |
1406 | { | |
ab9b110b CS |
1407 | void *blob; |
1408 | ||
1409 | if (!lsm_file_cache) | |
1410 | return; | |
1411 | ||
f25fce3e | 1412 | call_void_hook(file_free_security, file); |
ab9b110b CS |
1413 | |
1414 | blob = file->f_security; | |
1415 | file->f_security = NULL; | |
1416 | kmem_cache_free(lsm_file_cache, blob); | |
20510f2f JM |
1417 | } |
1418 | ||
1419 | int security_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
1420 | { | |
f25fce3e | 1421 | return call_int_hook(file_ioctl, 0, file, cmd, arg); |
20510f2f JM |
1422 | } |
1423 | ||
98de59bf | 1424 | static inline unsigned long mmap_prot(struct file *file, unsigned long prot) |
20510f2f | 1425 | { |
8b3ec681 | 1426 | /* |
98de59bf AV |
1427 | * Does we have PROT_READ and does the application expect |
1428 | * it to imply PROT_EXEC? If not, nothing to talk about... | |
8b3ec681 | 1429 | */ |
98de59bf AV |
1430 | if ((prot & (PROT_READ | PROT_EXEC)) != PROT_READ) |
1431 | return prot; | |
8b3ec681 | 1432 | if (!(current->personality & READ_IMPLIES_EXEC)) |
98de59bf AV |
1433 | return prot; |
1434 | /* | |
1435 | * if that's an anonymous mapping, let it. | |
1436 | */ | |
1437 | if (!file) | |
1438 | return prot | PROT_EXEC; | |
1439 | /* | |
1440 | * ditto if it's not on noexec mount, except that on !MMU we need | |
b4caecd4 | 1441 | * NOMMU_MAP_EXEC (== VM_MAYEXEC) in this case |
98de59bf | 1442 | */ |
90f8572b | 1443 | if (!path_noexec(&file->f_path)) { |
8b3ec681 | 1444 | #ifndef CONFIG_MMU |
b4caecd4 CH |
1445 | if (file->f_op->mmap_capabilities) { |
1446 | unsigned caps = file->f_op->mmap_capabilities(file); | |
1447 | if (!(caps & NOMMU_MAP_EXEC)) | |
1448 | return prot; | |
1449 | } | |
8b3ec681 | 1450 | #endif |
98de59bf | 1451 | return prot | PROT_EXEC; |
8b3ec681 | 1452 | } |
98de59bf AV |
1453 | /* anything on noexec mount won't get PROT_EXEC */ |
1454 | return prot; | |
1455 | } | |
1456 | ||
1457 | int security_mmap_file(struct file *file, unsigned long prot, | |
1458 | unsigned long flags) | |
1459 | { | |
1460 | int ret; | |
f25fce3e | 1461 | ret = call_int_hook(mmap_file, 0, file, prot, |
98de59bf | 1462 | mmap_prot(file, prot), flags); |
6c21a7fb MZ |
1463 | if (ret) |
1464 | return ret; | |
1465 | return ima_file_mmap(file, prot); | |
20510f2f | 1466 | } |
c088e31d | 1467 | EXPORT_SYMBOL_GPL(security_mmap_file); |
20510f2f | 1468 | |
e5467859 AV |
1469 | int security_mmap_addr(unsigned long addr) |
1470 | { | |
f25fce3e | 1471 | return call_int_hook(mmap_addr, 0, addr); |
e5467859 AV |
1472 | } |
1473 | ||
20510f2f JM |
1474 | int security_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot, |
1475 | unsigned long prot) | |
1476 | { | |
f25fce3e | 1477 | return call_int_hook(file_mprotect, 0, vma, reqprot, prot); |
20510f2f JM |
1478 | } |
1479 | ||
1480 | int security_file_lock(struct file *file, unsigned int cmd) | |
1481 | { | |
f25fce3e | 1482 | return call_int_hook(file_lock, 0, file, cmd); |
20510f2f JM |
1483 | } |
1484 | ||
1485 | int security_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg) | |
1486 | { | |
f25fce3e | 1487 | return call_int_hook(file_fcntl, 0, file, cmd, arg); |
20510f2f JM |
1488 | } |
1489 | ||
e0b93edd | 1490 | void security_file_set_fowner(struct file *file) |
20510f2f | 1491 | { |
f25fce3e | 1492 | call_void_hook(file_set_fowner, file); |
20510f2f JM |
1493 | } |
1494 | ||
1495 | int security_file_send_sigiotask(struct task_struct *tsk, | |
1496 | struct fown_struct *fown, int sig) | |
1497 | { | |
f25fce3e | 1498 | return call_int_hook(file_send_sigiotask, 0, tsk, fown, sig); |
20510f2f JM |
1499 | } |
1500 | ||
1501 | int security_file_receive(struct file *file) | |
1502 | { | |
f25fce3e | 1503 | return call_int_hook(file_receive, 0, file); |
20510f2f JM |
1504 | } |
1505 | ||
83d49856 | 1506 | int security_file_open(struct file *file, const struct cred *cred) |
20510f2f | 1507 | { |
c4ec54b4 EP |
1508 | int ret; |
1509 | ||
f25fce3e | 1510 | ret = call_int_hook(file_open, 0, file, cred); |
c4ec54b4 EP |
1511 | if (ret) |
1512 | return ret; | |
1513 | ||
1514 | return fsnotify_perm(file, MAY_OPEN); | |
20510f2f JM |
1515 | } |
1516 | ||
e4e55b47 TH |
1517 | int security_task_alloc(struct task_struct *task, unsigned long clone_flags) |
1518 | { | |
7f79f508 CS |
1519 | int rc = lsm_task_alloc(task); |
1520 | ||
7a90fc39 | 1521 | if (unlikely(rc)) |
7f79f508 CS |
1522 | return rc; |
1523 | rc = call_int_hook(task_alloc, 0, task, clone_flags); | |
1524 | if (unlikely(rc)) | |
1525 | security_task_free(task); | |
1526 | return rc; | |
e4e55b47 TH |
1527 | } |
1528 | ||
1a2a4d06 KC |
1529 | void security_task_free(struct task_struct *task) |
1530 | { | |
f25fce3e | 1531 | call_void_hook(task_free, task); |
7f79f508 CS |
1532 | |
1533 | kfree(task->security); | |
1534 | task->security = NULL; | |
1a2a4d06 KC |
1535 | } |
1536 | ||
ee18d64c DH |
1537 | int security_cred_alloc_blank(struct cred *cred, gfp_t gfp) |
1538 | { | |
f1efc8c4 CS |
1539 | int rc = lsm_cred_alloc(cred, gfp); |
1540 | ||
7a90fc39 | 1541 | if (unlikely(rc)) |
f1efc8c4 CS |
1542 | return rc; |
1543 | ||
1544 | rc = call_int_hook(cred_alloc_blank, 0, cred, gfp); | |
ab9b110b | 1545 | if (unlikely(rc)) |
f1efc8c4 CS |
1546 | security_cred_free(cred); |
1547 | return rc; | |
ee18d64c DH |
1548 | } |
1549 | ||
d84f4f99 | 1550 | void security_cred_free(struct cred *cred) |
20510f2f | 1551 | { |
f25fce3e | 1552 | call_void_hook(cred_free, cred); |
f1efc8c4 CS |
1553 | |
1554 | kfree(cred->security); | |
1555 | cred->security = NULL; | |
20510f2f JM |
1556 | } |
1557 | ||
d84f4f99 | 1558 | int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp) |
20510f2f | 1559 | { |
f1efc8c4 CS |
1560 | int rc = lsm_cred_alloc(new, gfp); |
1561 | ||
7a90fc39 | 1562 | if (unlikely(rc)) |
f1efc8c4 CS |
1563 | return rc; |
1564 | ||
1565 | rc = call_int_hook(cred_prepare, 0, new, old, gfp); | |
ab9b110b | 1566 | if (unlikely(rc)) |
f1efc8c4 CS |
1567 | security_cred_free(new); |
1568 | return rc; | |
d84f4f99 DH |
1569 | } |
1570 | ||
ee18d64c DH |
1571 | void security_transfer_creds(struct cred *new, const struct cred *old) |
1572 | { | |
f25fce3e | 1573 | call_void_hook(cred_transfer, new, old); |
ee18d64c DH |
1574 | } |
1575 | ||
3a3b7ce9 DH |
1576 | int security_kernel_act_as(struct cred *new, u32 secid) |
1577 | { | |
f25fce3e | 1578 | return call_int_hook(kernel_act_as, 0, new, secid); |
3a3b7ce9 DH |
1579 | } |
1580 | ||
1581 | int security_kernel_create_files_as(struct cred *new, struct inode *inode) | |
1582 | { | |
f25fce3e | 1583 | return call_int_hook(kernel_create_files_as, 0, new, inode); |
3a3b7ce9 DH |
1584 | } |
1585 | ||
dd8dbf2e | 1586 | int security_kernel_module_request(char *kmod_name) |
9188499c | 1587 | { |
f25fce3e | 1588 | return call_int_hook(kernel_module_request, 0, kmod_name); |
9188499c EP |
1589 | } |
1590 | ||
39eeb4fb MZ |
1591 | int security_kernel_read_file(struct file *file, enum kernel_read_file_id id) |
1592 | { | |
1593 | int ret; | |
1594 | ||
1595 | ret = call_int_hook(kernel_read_file, 0, file, id); | |
1596 | if (ret) | |
1597 | return ret; | |
1598 | return ima_read_file(file, id); | |
1599 | } | |
1600 | EXPORT_SYMBOL_GPL(security_kernel_read_file); | |
1601 | ||
bc8ca5b9 MZ |
1602 | int security_kernel_post_read_file(struct file *file, char *buf, loff_t size, |
1603 | enum kernel_read_file_id id) | |
b44a7dfc | 1604 | { |
cf222217 MZ |
1605 | int ret; |
1606 | ||
1607 | ret = call_int_hook(kernel_post_read_file, 0, file, buf, size, id); | |
1608 | if (ret) | |
1609 | return ret; | |
1610 | return ima_post_read_file(file, buf, size, id); | |
b44a7dfc MZ |
1611 | } |
1612 | EXPORT_SYMBOL_GPL(security_kernel_post_read_file); | |
1613 | ||
d84f4f99 DH |
1614 | int security_task_fix_setuid(struct cred *new, const struct cred *old, |
1615 | int flags) | |
20510f2f | 1616 | { |
f25fce3e | 1617 | return call_int_hook(task_fix_setuid, 0, new, old, flags); |
20510f2f JM |
1618 | } |
1619 | ||
20510f2f JM |
1620 | int security_task_setpgid(struct task_struct *p, pid_t pgid) |
1621 | { | |
f25fce3e | 1622 | return call_int_hook(task_setpgid, 0, p, pgid); |
20510f2f JM |
1623 | } |
1624 | ||
1625 | int security_task_getpgid(struct task_struct *p) | |
1626 | { | |
f25fce3e | 1627 | return call_int_hook(task_getpgid, 0, p); |
20510f2f JM |
1628 | } |
1629 | ||
1630 | int security_task_getsid(struct task_struct *p) | |
1631 | { | |
f25fce3e | 1632 | return call_int_hook(task_getsid, 0, p); |
20510f2f JM |
1633 | } |
1634 | ||
1635 | void security_task_getsecid(struct task_struct *p, u32 *secid) | |
1636 | { | |
b1d9e6b0 | 1637 | *secid = 0; |
f25fce3e | 1638 | call_void_hook(task_getsecid, p, secid); |
20510f2f JM |
1639 | } |
1640 | EXPORT_SYMBOL(security_task_getsecid); | |
1641 | ||
20510f2f JM |
1642 | int security_task_setnice(struct task_struct *p, int nice) |
1643 | { | |
f25fce3e | 1644 | return call_int_hook(task_setnice, 0, p, nice); |
20510f2f JM |
1645 | } |
1646 | ||
1647 | int security_task_setioprio(struct task_struct *p, int ioprio) | |
1648 | { | |
f25fce3e | 1649 | return call_int_hook(task_setioprio, 0, p, ioprio); |
20510f2f JM |
1650 | } |
1651 | ||
1652 | int security_task_getioprio(struct task_struct *p) | |
1653 | { | |
f25fce3e | 1654 | return call_int_hook(task_getioprio, 0, p); |
20510f2f JM |
1655 | } |
1656 | ||
791ec491 SS |
1657 | int security_task_prlimit(const struct cred *cred, const struct cred *tcred, |
1658 | unsigned int flags) | |
1659 | { | |
1660 | return call_int_hook(task_prlimit, 0, cred, tcred, flags); | |
1661 | } | |
1662 | ||
8fd00b4d JS |
1663 | int security_task_setrlimit(struct task_struct *p, unsigned int resource, |
1664 | struct rlimit *new_rlim) | |
20510f2f | 1665 | { |
f25fce3e | 1666 | return call_int_hook(task_setrlimit, 0, p, resource, new_rlim); |
20510f2f JM |
1667 | } |
1668 | ||
b0ae1981 | 1669 | int security_task_setscheduler(struct task_struct *p) |
20510f2f | 1670 | { |
f25fce3e | 1671 | return call_int_hook(task_setscheduler, 0, p); |
20510f2f JM |
1672 | } |
1673 | ||
1674 | int security_task_getscheduler(struct task_struct *p) | |
1675 | { | |
f25fce3e | 1676 | return call_int_hook(task_getscheduler, 0, p); |
20510f2f JM |
1677 | } |
1678 | ||
1679 | int security_task_movememory(struct task_struct *p) | |
1680 | { | |
f25fce3e | 1681 | return call_int_hook(task_movememory, 0, p); |
20510f2f JM |
1682 | } |
1683 | ||
1684 | int security_task_kill(struct task_struct *p, struct siginfo *info, | |
1685 | int sig, u32 secid) | |
1686 | { | |
f25fce3e | 1687 | return call_int_hook(task_kill, 0, p, info, sig, secid); |
20510f2f JM |
1688 | } |
1689 | ||
a69a0684 JJ |
1690 | #ifdef CONFIG_SECURITY_STACKING |
1691 | static char *nolsm = "-default"; | |
1692 | #define NOLSMLEN 9 | |
1693 | ||
c9353421 JJ |
1694 | static bool is_registered_lsm(const char *str, size_t size) |
1695 | { | |
1696 | struct security_hook_list *hp; | |
1697 | ||
1698 | list_for_each_entry(hp, &security_hook_heads.getprocattr, list) { | |
1699 | if (size == strlen(hp->lsm) && !strncmp(str, hp->lsm, size)) | |
1700 | return true; | |
1701 | } | |
1702 | ||
1703 | return false; | |
1704 | } | |
1705 | ||
1706 | static bool set_lsm_of_current(const char *str, size_t size) | |
1707 | { | |
1708 | char *lsm = lsm_of_task(current); | |
1709 | ||
1710 | if (is_registered_lsm(str, size)) { | |
1711 | strncpy(lsm, str, size); | |
1712 | lsm[size] = '\0'; | |
1713 | } else if (size == NOLSMLEN && !strncmp(str, nolsm, size)) { | |
1714 | lsm[0] = '\0'; | |
1715 | } else { | |
1716 | return false; | |
1717 | } | |
1718 | return true; | |
1719 | } | |
1720 | ||
a69a0684 JJ |
1721 | static int lsm_task_prctl(int option, unsigned long arg2, unsigned long arg3, |
1722 | unsigned long arg4, unsigned long arg5) | |
1723 | { | |
1724 | char *lsm = lsm_of_task(current); | |
1725 | char buffer[SECURITY_NAME_MAX + 1]; | |
1726 | __user char *optval = (__user char *)arg2; | |
1727 | __user int *optlen = (__user int *)arg3; | |
1728 | int dlen; | |
1729 | int len; | |
1730 | ||
1731 | switch (option) { | |
1732 | case PR_GET_DISPLAY_LSM: | |
1733 | len = arg4; | |
1734 | if (lsm[0] == '\0') { | |
1735 | lsm = nolsm; | |
1736 | dlen = NOLSMLEN; | |
1737 | } else | |
1738 | dlen = strlen(lsm) + 1; | |
1739 | if (dlen > len) | |
1740 | return -ERANGE; | |
1741 | if (copy_to_user(optval, lsm, dlen)) | |
1742 | return -EFAULT; | |
1743 | if (put_user(dlen, optlen)) | |
1744 | return -EFAULT; | |
1745 | break; | |
1746 | case PR_SET_DISPLAY_LSM: | |
1747 | len = arg3; | |
1748 | if (len > SECURITY_NAME_MAX) | |
1749 | return -EINVAL; | |
1750 | if (copy_from_user(buffer, optval, len)) | |
1751 | return -EFAULT; | |
1752 | buffer[len] = '\0'; | |
b3da8757 | 1753 | /* verify the requested LSM is registered */ |
c9353421 | 1754 | if (!set_lsm_of_current(buffer, len)) |
b3da8757 | 1755 | return -ENOENT; |
a69a0684 JJ |
1756 | break; |
1757 | default: | |
1758 | return -ENOSYS; | |
1759 | } | |
1760 | return 0; | |
1761 | } | |
1762 | #endif | |
1763 | ||
20510f2f | 1764 | int security_task_prctl(int option, unsigned long arg2, unsigned long arg3, |
d84f4f99 | 1765 | unsigned long arg4, unsigned long arg5) |
20510f2f | 1766 | { |
b1d9e6b0 CS |
1767 | int thisrc; |
1768 | int rc = -ENOSYS; | |
1769 | struct security_hook_list *hp; | |
1770 | ||
a69a0684 JJ |
1771 | #ifdef CONFIG_SECURITY_STACKING |
1772 | rc = lsm_task_prctl(option, arg2, arg3, arg4, arg5); | |
1773 | if (rc != -ENOSYS) | |
1774 | return rc; | |
1775 | #endif | |
1776 | ||
b1d9e6b0 CS |
1777 | list_for_each_entry(hp, &security_hook_heads.task_prctl, list) { |
1778 | thisrc = hp->hook.task_prctl(option, arg2, arg3, arg4, arg5); | |
1779 | if (thisrc != -ENOSYS) { | |
1780 | rc = thisrc; | |
1781 | if (thisrc != 0) | |
1782 | break; | |
1783 | } | |
1784 | } | |
1785 | return rc; | |
20510f2f JM |
1786 | } |
1787 | ||
1788 | void security_task_to_inode(struct task_struct *p, struct inode *inode) | |
1789 | { | |
f25fce3e | 1790 | call_void_hook(task_to_inode, p, inode); |
20510f2f JM |
1791 | } |
1792 | ||
1793 | int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag) | |
1794 | { | |
f25fce3e | 1795 | return call_int_hook(ipc_permission, 0, ipcp, flag); |
20510f2f JM |
1796 | } |
1797 | ||
8a076191 AD |
1798 | void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid) |
1799 | { | |
b1d9e6b0 | 1800 | *secid = 0; |
f25fce3e | 1801 | call_void_hook(ipc_getsecid, ipcp, secid); |
8a076191 AD |
1802 | } |
1803 | ||
20510f2f JM |
1804 | int security_msg_msg_alloc(struct msg_msg *msg) |
1805 | { | |
7a90fc39 CS |
1806 | int rc = lsm_msg_msg_alloc(msg); |
1807 | ||
1808 | if (unlikely(rc)) | |
1809 | return rc; | |
1810 | rc = call_int_hook(msg_msg_alloc_security, 0, msg); | |
1811 | if (unlikely(rc)) | |
1812 | security_msg_msg_free(msg); | |
1813 | return rc; | |
20510f2f JM |
1814 | } |
1815 | ||
1816 | void security_msg_msg_free(struct msg_msg *msg) | |
1817 | { | |
f25fce3e | 1818 | call_void_hook(msg_msg_free_security, msg); |
7a90fc39 CS |
1819 | kfree(msg->security); |
1820 | msg->security = NULL; | |
20510f2f JM |
1821 | } |
1822 | ||
1823 | int security_msg_queue_alloc(struct msg_queue *msq) | |
1824 | { | |
7a90fc39 CS |
1825 | int rc = lsm_ipc_alloc(&msq->q_perm); |
1826 | ||
1827 | if (unlikely(rc)) | |
1828 | return rc; | |
1829 | rc = call_int_hook(msg_queue_alloc_security, 0, msq); | |
1830 | if (unlikely(rc)) | |
1831 | security_msg_queue_free(msq); | |
1832 | return rc; | |
20510f2f JM |
1833 | } |
1834 | ||
1835 | void security_msg_queue_free(struct msg_queue *msq) | |
1836 | { | |
7a90fc39 CS |
1837 | struct kern_ipc_perm *kip = &msq->q_perm; |
1838 | ||
f25fce3e | 1839 | call_void_hook(msg_queue_free_security, msq); |
7a90fc39 CS |
1840 | kfree(kip->security); |
1841 | kip->security = NULL; | |
20510f2f JM |
1842 | } |
1843 | ||
1844 | int security_msg_queue_associate(struct msg_queue *msq, int msqflg) | |
1845 | { | |
f25fce3e | 1846 | return call_int_hook(msg_queue_associate, 0, msq, msqflg); |
20510f2f JM |
1847 | } |
1848 | ||
1849 | int security_msg_queue_msgctl(struct msg_queue *msq, int cmd) | |
1850 | { | |
f25fce3e | 1851 | return call_int_hook(msg_queue_msgctl, 0, msq, cmd); |
20510f2f JM |
1852 | } |
1853 | ||
1854 | int security_msg_queue_msgsnd(struct msg_queue *msq, | |
1855 | struct msg_msg *msg, int msqflg) | |
1856 | { | |
f25fce3e | 1857 | return call_int_hook(msg_queue_msgsnd, 0, msq, msg, msqflg); |
20510f2f JM |
1858 | } |
1859 | ||
1860 | int security_msg_queue_msgrcv(struct msg_queue *msq, struct msg_msg *msg, | |
1861 | struct task_struct *target, long type, int mode) | |
1862 | { | |
f25fce3e | 1863 | return call_int_hook(msg_queue_msgrcv, 0, msq, msg, target, type, mode); |
20510f2f JM |
1864 | } |
1865 | ||
1866 | int security_shm_alloc(struct shmid_kernel *shp) | |
1867 | { | |
7a90fc39 CS |
1868 | int rc = lsm_ipc_alloc(&shp->shm_perm); |
1869 | ||
1870 | if (unlikely(rc)) | |
1871 | return rc; | |
1872 | rc = call_int_hook(shm_alloc_security, 0, shp); | |
1873 | if (unlikely(rc)) | |
1874 | security_shm_free(shp); | |
1875 | return rc; | |
20510f2f JM |
1876 | } |
1877 | ||
1878 | void security_shm_free(struct shmid_kernel *shp) | |
1879 | { | |
7a90fc39 CS |
1880 | struct kern_ipc_perm *kip = &shp->shm_perm; |
1881 | ||
f25fce3e | 1882 | call_void_hook(shm_free_security, shp); |
7a90fc39 CS |
1883 | kfree(kip->security); |
1884 | kip->security = NULL; | |
20510f2f JM |
1885 | } |
1886 | ||
1887 | int security_shm_associate(struct shmid_kernel *shp, int shmflg) | |
1888 | { | |
f25fce3e | 1889 | return call_int_hook(shm_associate, 0, shp, shmflg); |
20510f2f JM |
1890 | } |
1891 | ||
1892 | int security_shm_shmctl(struct shmid_kernel *shp, int cmd) | |
1893 | { | |
f25fce3e | 1894 | return call_int_hook(shm_shmctl, 0, shp, cmd); |
20510f2f JM |
1895 | } |
1896 | ||
1897 | int security_shm_shmat(struct shmid_kernel *shp, char __user *shmaddr, int shmflg) | |
1898 | { | |
f25fce3e | 1899 | return call_int_hook(shm_shmat, 0, shp, shmaddr, shmflg); |
20510f2f JM |
1900 | } |
1901 | ||
1902 | int security_sem_alloc(struct sem_array *sma) | |
1903 | { | |
7a90fc39 CS |
1904 | int rc = lsm_ipc_alloc(&sma->sem_perm); |
1905 | ||
1906 | if (unlikely(rc)) | |
1907 | return rc; | |
1908 | rc = call_int_hook(sem_alloc_security, 0, sma); | |
1909 | if (unlikely(rc)) | |
1910 | security_sem_free(sma); | |
1911 | return rc; | |
20510f2f JM |
1912 | } |
1913 | ||
1914 | void security_sem_free(struct sem_array *sma) | |
1915 | { | |
7a90fc39 CS |
1916 | struct kern_ipc_perm *kip = &sma->sem_perm; |
1917 | ||
f25fce3e | 1918 | call_void_hook(sem_free_security, sma); |
7a90fc39 CS |
1919 | kfree(kip->security); |
1920 | kip->security = NULL; | |
20510f2f JM |
1921 | } |
1922 | ||
1923 | int security_sem_associate(struct sem_array *sma, int semflg) | |
1924 | { | |
f25fce3e | 1925 | return call_int_hook(sem_associate, 0, sma, semflg); |
20510f2f JM |
1926 | } |
1927 | ||
1928 | int security_sem_semctl(struct sem_array *sma, int cmd) | |
1929 | { | |
f25fce3e | 1930 | return call_int_hook(sem_semctl, 0, sma, cmd); |
20510f2f JM |
1931 | } |
1932 | ||
1933 | int security_sem_semop(struct sem_array *sma, struct sembuf *sops, | |
1934 | unsigned nsops, int alter) | |
1935 | { | |
f25fce3e | 1936 | return call_int_hook(sem_semop, 0, sma, sops, nsops, alter); |
20510f2f JM |
1937 | } |
1938 | ||
1939 | void security_d_instantiate(struct dentry *dentry, struct inode *inode) | |
1940 | { | |
1941 | if (unlikely(inode && IS_PRIVATE(inode))) | |
1942 | return; | |
f25fce3e | 1943 | call_void_hook(d_instantiate, dentry, inode); |
20510f2f JM |
1944 | } |
1945 | EXPORT_SYMBOL(security_d_instantiate); | |
1946 | ||
dcd148a1 CS |
1947 | int security_getprocattr(struct task_struct *p, const char *lsm, char *name, |
1948 | char **value) | |
20510f2f | 1949 | { |
a69a0684 JJ |
1950 | #ifdef CONFIG_SECURITY_STACKING |
1951 | char *speclsm = lsm_of_task(p); | |
1952 | #endif | |
dcd148a1 | 1953 | struct security_hook_list *hp; |
c9353421 JJ |
1954 | char *vp; |
1955 | char *cp = NULL; | |
1956 | int trc; | |
1957 | int rc; | |
1958 | ||
1959 | /* | |
1960 | * "context" requires work here in addition to what | |
1961 | * the modules provide. | |
1962 | */ | |
1963 | if (strcmp(name, "context") == 0) { | |
1964 | *value = NULL; | |
1965 | rc = -EINVAL; | |
1966 | list_for_each_entry(hp, | |
1967 | &security_hook_heads.getprocattr, list) { | |
1968 | if (lsm != NULL && strcmp(lsm, hp->lsm)) | |
1969 | continue; | |
1970 | trc = hp->hook.getprocattr(p, "context", &vp); | |
1971 | if (trc == -ENOENT) | |
1972 | continue; | |
1973 | if (trc <= 0) { | |
1974 | kfree(*value); | |
1975 | return trc; | |
1976 | } | |
1977 | rc = trc; | |
1978 | if (*value == NULL) { | |
1979 | *value = vp; | |
1980 | } else { | |
1981 | cp = kasprintf(GFP_KERNEL, "%s,%s", *value, vp); | |
1982 | if (cp == NULL) { | |
1983 | kfree(*value); | |
1984 | kfree(vp); | |
1985 | return -ENOMEM; | |
1986 | } | |
1987 | kfree(*value); | |
1988 | kfree(vp); | |
1989 | *value = cp; | |
1990 | } | |
1991 | } | |
1992 | if (rc > 0) | |
1993 | return strlen(*value); | |
1994 | return rc; | |
1995 | } else if (strcmp(name, "display_lsm") == 0) { | |
1996 | *value = kstrdup(current->security, GFP_KERNEL); | |
1997 | if (*value == NULL) | |
1998 | return -ENOMEM; | |
1999 | return strlen(*value); | |
2000 | } | |
dcd148a1 CS |
2001 | |
2002 | list_for_each_entry(hp, &security_hook_heads.getprocattr, list) { | |
2003 | if (lsm != NULL && strcmp(lsm, hp->lsm)) | |
2004 | continue; | |
a69a0684 JJ |
2005 | #ifdef CONFIG_SECURITY_STACKING |
2006 | if (!lsm && speclsm && speclsm[0] && strcmp(speclsm, hp->lsm)) | |
2007 | continue; | |
2008 | #endif | |
2009 | rc = hp->hook.getprocattr(p, name, value); | |
2010 | if (rc != -ENOSYS) | |
2011 | return rc; | |
dcd148a1 CS |
2012 | } |
2013 | return -EINVAL; | |
20510f2f JM |
2014 | } |
2015 | ||
dcd148a1 CS |
2016 | int security_setprocattr(const char *lsm, const char *name, void *value, |
2017 | size_t size) | |
20510f2f | 2018 | { |
a69a0684 JJ |
2019 | #ifdef CONFIG_SECURITY_STACKING |
2020 | char *speclsm = lsm_of_task(current); | |
2021 | struct lsm_value *lsm_value = NULL; | |
2022 | int count; | |
2023 | #else | |
2024 | char *tvalue; | |
2025 | #endif | |
dcd148a1 | 2026 | struct security_hook_list *hp; |
a69a0684 JJ |
2027 | int rc; |
2028 | char *temp; | |
2029 | char *cp; | |
2030 | ||
2031 | /* | |
2032 | * If lsm is NULL look at all the modules to find one | |
2033 | * that processes name. If lsm is not NULL only look at | |
2034 | * that module. | |
2035 | * | |
2036 | * "context" is handled directly here. | |
2037 | */ | |
2038 | if (strcmp(name, "context") == 0) { | |
2039 | rc = -EINVAL; | |
2040 | temp = kmemdup(value, size + 1, GFP_KERNEL); | |
2041 | if (!temp) | |
2042 | return -ENOMEM; | |
2043 | ||
2044 | temp[size] = '\0'; | |
2045 | cp = strrchr(temp, '\''); | |
2046 | if (!cp) | |
2047 | goto free_out; | |
2048 | ||
2049 | cp[1] = '\0'; | |
2050 | #ifdef CONFIG_SECURITY_STACKING | |
2051 | lsm_value = kzalloc(sizeof(*lsm_value) * LSM_MAX_MAJOR, | |
2052 | GFP_KERNEL); | |
2053 | if (!lsm_value) { | |
2054 | rc = -ENOMEM; | |
2055 | goto free_out; | |
2056 | } | |
2057 | ||
2058 | count = lsm_parse_context(temp, lsm_value); | |
2059 | if (count <= 0) | |
2060 | goto free_out; | |
2061 | ||
2062 | for (count--; count >= 0; count--) { | |
2063 | list_for_each_entry(hp, | |
2064 | &security_hook_heads.setprocattr, list) { | |
2065 | ||
2066 | if (lsm && strcmp(lsm, hp->lsm)) | |
2067 | continue; | |
2068 | if (!strcmp(hp->lsm, lsm_value[count].lsm)) { | |
2069 | rc = hp->hook.setprocattr("context", | |
2070 | lsm_value[count].data, | |
2071 | strlen(lsm_value[count].data)); | |
2072 | break; | |
2073 | } | |
2074 | } | |
2075 | if (rc < 0 || (lsm && rc >0)) | |
2076 | break; | |
2077 | } | |
2078 | #else /* CONFIG_SECURITY_STACKING */ | |
2079 | cp = strstr(temp, "='"); | |
2080 | if (!cp) | |
2081 | goto free_out; | |
2082 | *cp = '\0'; | |
2083 | tvalue = strchr(cp + 2, '\''); | |
2084 | if (!tvalue) | |
2085 | goto free_out; | |
2086 | list_for_each_entry(hp, &security_hook_heads.setprocattr, | |
2087 | list) { | |
2088 | if (lsm == NULL || !strcmp(lsm, hp->lsm)) { | |
2089 | rc = hp->hook.setprocattr(name, tvalue, size); | |
2090 | break; | |
2091 | } | |
2092 | } | |
2093 | #endif /* CONFIG_SECURITY_STACKING */ | |
2094 | free_out: | |
2095 | kfree(temp); | |
2096 | #ifdef CONFIG_SECURITY_STACKING | |
2097 | kfree(lsm_value); | |
2098 | #endif | |
2099 | if (rc >= 0) | |
2100 | return size; | |
2101 | return rc; | |
c9353421 JJ |
2102 | } else if (strcmp(name, "display_lsm") == 0) { |
2103 | #ifdef CONFIG_SECURITY_STACKING | |
2104 | if (set_lsm_of_current(value, size)) | |
2105 | return size; | |
2106 | #endif | |
2107 | return -EINVAL; | |
a69a0684 | 2108 | } |
dcd148a1 CS |
2109 | |
2110 | list_for_each_entry(hp, &security_hook_heads.setprocattr, list) { | |
a69a0684 JJ |
2111 | #ifdef CONFIG_SECURITY_STACKING |
2112 | if (!lsm && speclsm && speclsm[0] && strcmp(speclsm, hp->lsm)) | |
dcd148a1 | 2113 | continue; |
a69a0684 JJ |
2114 | #endif |
2115 | rc = hp->hook.setprocattr(name, value, size); | |
2116 | if (rc) | |
2117 | return rc; | |
dcd148a1 CS |
2118 | } |
2119 | return -EINVAL; | |
20510f2f JM |
2120 | } |
2121 | ||
2122 | int security_netlink_send(struct sock *sk, struct sk_buff *skb) | |
2123 | { | |
f25fce3e | 2124 | return call_int_hook(netlink_send, 0, sk, skb); |
20510f2f | 2125 | } |
20510f2f | 2126 | |
746df9b5 DQ |
2127 | int security_ismaclabel(const char *name) |
2128 | { | |
f25fce3e | 2129 | return call_int_hook(ismaclabel, 0, name); |
746df9b5 DQ |
2130 | } |
2131 | EXPORT_SYMBOL(security_ismaclabel); | |
2132 | ||
20510f2f JM |
2133 | int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen) |
2134 | { | |
b1d9e6b0 CS |
2135 | return call_int_hook(secid_to_secctx, -EOPNOTSUPP, secid, secdata, |
2136 | seclen); | |
20510f2f JM |
2137 | } |
2138 | EXPORT_SYMBOL(security_secid_to_secctx); | |
2139 | ||
7bf570dc | 2140 | int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid) |
63cb3449 | 2141 | { |
b1d9e6b0 | 2142 | *secid = 0; |
f25fce3e | 2143 | return call_int_hook(secctx_to_secid, 0, secdata, seclen, secid); |
63cb3449 DH |
2144 | } |
2145 | EXPORT_SYMBOL(security_secctx_to_secid); | |
2146 | ||
20510f2f JM |
2147 | void security_release_secctx(char *secdata, u32 seclen) |
2148 | { | |
a69a0684 JJ |
2149 | #ifdef CONFIG_SECURITY_STACKING |
2150 | char *speclsm = lsm_of_task(current); | |
2151 | #endif | |
2152 | struct security_hook_list *hp; | |
2153 | ||
2154 | list_for_each_entry(hp, &security_hook_heads.release_secctx, list) { | |
2155 | #ifdef CONFIG_SECURITY_STACKING | |
2156 | if (speclsm[0] && strcmp(hp->lsm, speclsm)) | |
2157 | continue; | |
2158 | #endif | |
2159 | hp->hook.release_secctx(secdata, seclen); | |
2160 | break; | |
2161 | } | |
20510f2f JM |
2162 | } |
2163 | EXPORT_SYMBOL(security_release_secctx); | |
2164 | ||
6f3be9f5 AG |
2165 | void security_inode_invalidate_secctx(struct inode *inode) |
2166 | { | |
2167 | call_void_hook(inode_invalidate_secctx, inode); | |
2168 | } | |
2169 | EXPORT_SYMBOL(security_inode_invalidate_secctx); | |
2170 | ||
1ee65e37 DQ |
2171 | int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen) |
2172 | { | |
f25fce3e | 2173 | return call_int_hook(inode_notifysecctx, 0, inode, ctx, ctxlen); |
1ee65e37 DQ |
2174 | } |
2175 | EXPORT_SYMBOL(security_inode_notifysecctx); | |
2176 | ||
2177 | int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen) | |
2178 | { | |
f25fce3e | 2179 | return call_int_hook(inode_setsecctx, 0, dentry, ctx, ctxlen); |
1ee65e37 DQ |
2180 | } |
2181 | EXPORT_SYMBOL(security_inode_setsecctx); | |
2182 | ||
2183 | int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen) | |
2184 | { | |
b1d9e6b0 | 2185 | return call_int_hook(inode_getsecctx, -EOPNOTSUPP, inode, ctx, ctxlen); |
1ee65e37 DQ |
2186 | } |
2187 | EXPORT_SYMBOL(security_inode_getsecctx); | |
2188 | ||
20510f2f JM |
2189 | #ifdef CONFIG_SECURITY_NETWORK |
2190 | ||
3610cda5 | 2191 | int security_unix_stream_connect(struct sock *sock, struct sock *other, struct sock *newsk) |
20510f2f | 2192 | { |
f25fce3e | 2193 | return call_int_hook(unix_stream_connect, 0, sock, other, newsk); |
20510f2f JM |
2194 | } |
2195 | EXPORT_SYMBOL(security_unix_stream_connect); | |
2196 | ||
2197 | int security_unix_may_send(struct socket *sock, struct socket *other) | |
2198 | { | |
f25fce3e | 2199 | return call_int_hook(unix_may_send, 0, sock, other); |
20510f2f JM |
2200 | } |
2201 | EXPORT_SYMBOL(security_unix_may_send); | |
2202 | ||
2203 | int security_socket_create(int family, int type, int protocol, int kern) | |
2204 | { | |
f25fce3e | 2205 | return call_int_hook(socket_create, 0, family, type, protocol, kern); |
20510f2f JM |
2206 | } |
2207 | ||
2208 | int security_socket_post_create(struct socket *sock, int family, | |
2209 | int type, int protocol, int kern) | |
2210 | { | |
f25fce3e | 2211 | return call_int_hook(socket_post_create, 0, sock, family, type, |
20510f2f JM |
2212 | protocol, kern); |
2213 | } | |
2214 | ||
2215 | int security_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen) | |
2216 | { | |
f25fce3e | 2217 | return call_int_hook(socket_bind, 0, sock, address, addrlen); |
20510f2f JM |
2218 | } |
2219 | ||
2220 | int security_socket_connect(struct socket *sock, struct sockaddr *address, int addrlen) | |
2221 | { | |
f25fce3e | 2222 | return call_int_hook(socket_connect, 0, sock, address, addrlen); |
20510f2f JM |
2223 | } |
2224 | ||
2225 | int security_socket_listen(struct socket *sock, int backlog) | |
2226 | { | |
f25fce3e | 2227 | return call_int_hook(socket_listen, 0, sock, backlog); |
20510f2f JM |
2228 | } |
2229 | ||
2230 | int security_socket_accept(struct socket *sock, struct socket *newsock) | |
2231 | { | |
f25fce3e | 2232 | return call_int_hook(socket_accept, 0, sock, newsock); |
20510f2f JM |
2233 | } |
2234 | ||
20510f2f JM |
2235 | int security_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size) |
2236 | { | |
f25fce3e | 2237 | return call_int_hook(socket_sendmsg, 0, sock, msg, size); |
20510f2f JM |
2238 | } |
2239 | ||
2240 | int security_socket_recvmsg(struct socket *sock, struct msghdr *msg, | |
2241 | int size, int flags) | |
2242 | { | |
f25fce3e | 2243 | return call_int_hook(socket_recvmsg, 0, sock, msg, size, flags); |
20510f2f JM |
2244 | } |
2245 | ||
2246 | int security_socket_getsockname(struct socket *sock) | |
2247 | { | |
f25fce3e | 2248 | return call_int_hook(socket_getsockname, 0, sock); |
20510f2f JM |
2249 | } |
2250 | ||
2251 | int security_socket_getpeername(struct socket *sock) | |
2252 | { | |
f25fce3e | 2253 | return call_int_hook(socket_getpeername, 0, sock); |
20510f2f JM |
2254 | } |
2255 | ||
2256 | int security_socket_getsockopt(struct socket *sock, int level, int optname) | |
2257 | { | |
f25fce3e | 2258 | return call_int_hook(socket_getsockopt, 0, sock, level, optname); |
20510f2f JM |
2259 | } |
2260 | ||
2261 | int security_socket_setsockopt(struct socket *sock, int level, int optname) | |
2262 | { | |
f25fce3e | 2263 | return call_int_hook(socket_setsockopt, 0, sock, level, optname); |
20510f2f JM |
2264 | } |
2265 | ||
2266 | int security_socket_shutdown(struct socket *sock, int how) | |
2267 | { | |
f25fce3e | 2268 | return call_int_hook(socket_shutdown, 0, sock, how); |
20510f2f JM |
2269 | } |
2270 | ||
2271 | int security_sock_rcv_skb(struct sock *sk, struct sk_buff *skb) | |
2272 | { | |
f25fce3e | 2273 | return call_int_hook(socket_sock_rcv_skb, 0, sk, skb); |
20510f2f JM |
2274 | } |
2275 | EXPORT_SYMBOL(security_sock_rcv_skb); | |
2276 | ||
2277 | int security_socket_getpeersec_stream(struct socket *sock, char __user *optval, | |
2278 | int __user *optlen, unsigned len) | |
2279 | { | |
8e42f92b JJ |
2280 | #ifdef CONFIG_SECURITY_STACKING |
2281 | struct security_hook_list *hp; | |
2282 | char *lsm = lsm_of_task(current); | |
2283 | ||
2284 | list_for_each_entry(hp, &security_hook_heads.socket_getpeersec_stream, | |
2285 | list) { | |
2286 | if (!lsm || !lsm[0] || !strcmp(lsm, hp->lsm)) | |
2287 | return hp->hook.socket_getpeersec_stream(sock, optval, | |
2288 | optlen, len); | |
2289 | } | |
2290 | return -ENOPROTOOPT; | |
2291 | #else | |
b1d9e6b0 CS |
2292 | return call_int_hook(socket_getpeersec_stream, -ENOPROTOOPT, sock, |
2293 | optval, optlen, len); | |
8e42f92b | 2294 | #endif |
20510f2f JM |
2295 | } |
2296 | ||
2297 | int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid) | |
2298 | { | |
e308fd3b JB |
2299 | return call_int_hook(socket_getpeersec_dgram, -ENOPROTOOPT, sock, |
2300 | skb, secid); | |
20510f2f JM |
2301 | } |
2302 | EXPORT_SYMBOL(security_socket_getpeersec_dgram); | |
2303 | ||
2304 | int security_sk_alloc(struct sock *sk, int family, gfp_t priority) | |
2305 | { | |
7a90fc39 CS |
2306 | int rc = lsm_sock_alloc(sk, priority); |
2307 | ||
2308 | if (unlikely(rc)) | |
2309 | return rc; | |
2310 | rc = call_int_hook(sk_alloc_security, 0, sk, family, priority); | |
2311 | if (unlikely(rc)) | |
2312 | security_sk_free(sk); | |
2313 | return rc; | |
20510f2f JM |
2314 | } |
2315 | ||
2316 | void security_sk_free(struct sock *sk) | |
2317 | { | |
f25fce3e | 2318 | call_void_hook(sk_free_security, sk); |
7a90fc39 CS |
2319 | kfree(sk->sk_security); |
2320 | sk->sk_security = NULL; | |
20510f2f JM |
2321 | } |
2322 | ||
2323 | void security_sk_clone(const struct sock *sk, struct sock *newsk) | |
2324 | { | |
f25fce3e | 2325 | call_void_hook(sk_clone_security, sk, newsk); |
20510f2f | 2326 | } |
6230c9b4 | 2327 | EXPORT_SYMBOL(security_sk_clone); |
20510f2f JM |
2328 | |
2329 | void security_sk_classify_flow(struct sock *sk, struct flowi *fl) | |
2330 | { | |
f25fce3e | 2331 | call_void_hook(sk_getsecid, sk, &fl->flowi_secid); |
20510f2f JM |
2332 | } |
2333 | EXPORT_SYMBOL(security_sk_classify_flow); | |
2334 | ||
2335 | void security_req_classify_flow(const struct request_sock *req, struct flowi *fl) | |
2336 | { | |
f25fce3e | 2337 | call_void_hook(req_classify_flow, req, fl); |
20510f2f JM |
2338 | } |
2339 | EXPORT_SYMBOL(security_req_classify_flow); | |
2340 | ||
2341 | void security_sock_graft(struct sock *sk, struct socket *parent) | |
2342 | { | |
f25fce3e | 2343 | call_void_hook(sock_graft, sk, parent); |
20510f2f JM |
2344 | } |
2345 | EXPORT_SYMBOL(security_sock_graft); | |
2346 | ||
2347 | int security_inet_conn_request(struct sock *sk, | |
2348 | struct sk_buff *skb, struct request_sock *req) | |
2349 | { | |
f25fce3e | 2350 | return call_int_hook(inet_conn_request, 0, sk, skb, req); |
20510f2f JM |
2351 | } |
2352 | EXPORT_SYMBOL(security_inet_conn_request); | |
2353 | ||
2354 | void security_inet_csk_clone(struct sock *newsk, | |
2355 | const struct request_sock *req) | |
2356 | { | |
f25fce3e | 2357 | call_void_hook(inet_csk_clone, newsk, req); |
20510f2f JM |
2358 | } |
2359 | ||
2360 | void security_inet_conn_established(struct sock *sk, | |
2361 | struct sk_buff *skb) | |
2362 | { | |
f25fce3e | 2363 | call_void_hook(inet_conn_established, sk, skb); |
20510f2f JM |
2364 | } |
2365 | ||
2606fd1f EP |
2366 | int security_secmark_relabel_packet(u32 secid) |
2367 | { | |
f25fce3e | 2368 | return call_int_hook(secmark_relabel_packet, 0, secid); |
2606fd1f EP |
2369 | } |
2370 | EXPORT_SYMBOL(security_secmark_relabel_packet); | |
2371 | ||
2372 | void security_secmark_refcount_inc(void) | |
2373 | { | |
f25fce3e | 2374 | call_void_hook(secmark_refcount_inc); |
2606fd1f EP |
2375 | } |
2376 | EXPORT_SYMBOL(security_secmark_refcount_inc); | |
2377 | ||
2378 | void security_secmark_refcount_dec(void) | |
2379 | { | |
f25fce3e | 2380 | call_void_hook(secmark_refcount_dec); |
2606fd1f EP |
2381 | } |
2382 | EXPORT_SYMBOL(security_secmark_refcount_dec); | |
2383 | ||
5dbbaf2d PM |
2384 | int security_tun_dev_alloc_security(void **security) |
2385 | { | |
f25fce3e | 2386 | return call_int_hook(tun_dev_alloc_security, 0, security); |
5dbbaf2d PM |
2387 | } |
2388 | EXPORT_SYMBOL(security_tun_dev_alloc_security); | |
2389 | ||
2390 | void security_tun_dev_free_security(void *security) | |
2391 | { | |
f25fce3e | 2392 | call_void_hook(tun_dev_free_security, security); |
5dbbaf2d PM |
2393 | } |
2394 | EXPORT_SYMBOL(security_tun_dev_free_security); | |
2395 | ||
2b980dbd PM |
2396 | int security_tun_dev_create(void) |
2397 | { | |
f25fce3e | 2398 | return call_int_hook(tun_dev_create, 0); |
2b980dbd PM |
2399 | } |
2400 | EXPORT_SYMBOL(security_tun_dev_create); | |
2401 | ||
5dbbaf2d | 2402 | int security_tun_dev_attach_queue(void *security) |
2b980dbd | 2403 | { |
f25fce3e | 2404 | return call_int_hook(tun_dev_attach_queue, 0, security); |
2b980dbd | 2405 | } |
5dbbaf2d | 2406 | EXPORT_SYMBOL(security_tun_dev_attach_queue); |
2b980dbd | 2407 | |
5dbbaf2d | 2408 | int security_tun_dev_attach(struct sock *sk, void *security) |
2b980dbd | 2409 | { |
f25fce3e | 2410 | return call_int_hook(tun_dev_attach, 0, sk, security); |
2b980dbd PM |
2411 | } |
2412 | EXPORT_SYMBOL(security_tun_dev_attach); | |
2413 | ||
5dbbaf2d PM |
2414 | int security_tun_dev_open(void *security) |
2415 | { | |
f25fce3e | 2416 | return call_int_hook(tun_dev_open, 0, security); |
5dbbaf2d PM |
2417 | } |
2418 | EXPORT_SYMBOL(security_tun_dev_open); | |
2419 | ||
20510f2f JM |
2420 | #endif /* CONFIG_SECURITY_NETWORK */ |
2421 | ||
d291f1a6 DJ |
2422 | #ifdef CONFIG_SECURITY_INFINIBAND |
2423 | ||
2424 | int security_ib_pkey_access(void *sec, u64 subnet_prefix, u16 pkey) | |
2425 | { | |
2426 | return call_int_hook(ib_pkey_access, 0, sec, subnet_prefix, pkey); | |
2427 | } | |
2428 | EXPORT_SYMBOL(security_ib_pkey_access); | |
2429 | ||
47a2b338 DJ |
2430 | int security_ib_endport_manage_subnet(void *sec, const char *dev_name, u8 port_num) |
2431 | { | |
2432 | return call_int_hook(ib_endport_manage_subnet, 0, sec, dev_name, port_num); | |
2433 | } | |
2434 | EXPORT_SYMBOL(security_ib_endport_manage_subnet); | |
2435 | ||
d291f1a6 DJ |
2436 | int security_ib_alloc_security(void **sec) |
2437 | { | |
2438 | return call_int_hook(ib_alloc_security, 0, sec); | |
2439 | } | |
2440 | EXPORT_SYMBOL(security_ib_alloc_security); | |
2441 | ||
2442 | void security_ib_free_security(void *sec) | |
2443 | { | |
2444 | call_void_hook(ib_free_security, sec); | |
2445 | } | |
2446 | EXPORT_SYMBOL(security_ib_free_security); | |
2447 | #endif /* CONFIG_SECURITY_INFINIBAND */ | |
2448 | ||
20510f2f JM |
2449 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
2450 | ||
52a4c640 NA |
2451 | int security_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp, |
2452 | struct xfrm_user_sec_ctx *sec_ctx, | |
2453 | gfp_t gfp) | |
20510f2f | 2454 | { |
f25fce3e | 2455 | return call_int_hook(xfrm_policy_alloc_security, 0, ctxp, sec_ctx, gfp); |
20510f2f JM |
2456 | } |
2457 | EXPORT_SYMBOL(security_xfrm_policy_alloc); | |
2458 | ||
03e1ad7b PM |
2459 | int security_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx, |
2460 | struct xfrm_sec_ctx **new_ctxp) | |
20510f2f | 2461 | { |
f25fce3e | 2462 | return call_int_hook(xfrm_policy_clone_security, 0, old_ctx, new_ctxp); |
20510f2f JM |
2463 | } |
2464 | ||
03e1ad7b | 2465 | void security_xfrm_policy_free(struct xfrm_sec_ctx *ctx) |
20510f2f | 2466 | { |
f25fce3e | 2467 | call_void_hook(xfrm_policy_free_security, ctx); |
20510f2f JM |
2468 | } |
2469 | EXPORT_SYMBOL(security_xfrm_policy_free); | |
2470 | ||
03e1ad7b | 2471 | int security_xfrm_policy_delete(struct xfrm_sec_ctx *ctx) |
20510f2f | 2472 | { |
f25fce3e | 2473 | return call_int_hook(xfrm_policy_delete_security, 0, ctx); |
20510f2f JM |
2474 | } |
2475 | ||
2e5aa866 PM |
2476 | int security_xfrm_state_alloc(struct xfrm_state *x, |
2477 | struct xfrm_user_sec_ctx *sec_ctx) | |
20510f2f | 2478 | { |
f25fce3e | 2479 | return call_int_hook(xfrm_state_alloc, 0, x, sec_ctx); |
20510f2f JM |
2480 | } |
2481 | EXPORT_SYMBOL(security_xfrm_state_alloc); | |
2482 | ||
2483 | int security_xfrm_state_alloc_acquire(struct xfrm_state *x, | |
2484 | struct xfrm_sec_ctx *polsec, u32 secid) | |
2485 | { | |
f25fce3e | 2486 | return call_int_hook(xfrm_state_alloc_acquire, 0, x, polsec, secid); |
20510f2f JM |
2487 | } |
2488 | ||
2489 | int security_xfrm_state_delete(struct xfrm_state *x) | |
2490 | { | |
f25fce3e | 2491 | return call_int_hook(xfrm_state_delete_security, 0, x); |
20510f2f JM |
2492 | } |
2493 | EXPORT_SYMBOL(security_xfrm_state_delete); | |
2494 | ||
2495 | void security_xfrm_state_free(struct xfrm_state *x) | |
2496 | { | |
f25fce3e | 2497 | call_void_hook(xfrm_state_free_security, x); |
20510f2f JM |
2498 | } |
2499 | ||
03e1ad7b | 2500 | int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir) |
20510f2f | 2501 | { |
f25fce3e | 2502 | return call_int_hook(xfrm_policy_lookup, 0, ctx, fl_secid, dir); |
20510f2f JM |
2503 | } |
2504 | ||
2505 | int security_xfrm_state_pol_flow_match(struct xfrm_state *x, | |
e33f7704 DM |
2506 | struct xfrm_policy *xp, |
2507 | const struct flowi *fl) | |
20510f2f | 2508 | { |
b1d9e6b0 CS |
2509 | struct security_hook_list *hp; |
2510 | int rc = 1; | |
2511 | ||
2512 | /* | |
2513 | * Since this function is expected to return 0 or 1, the judgment | |
2514 | * becomes difficult if multiple LSMs supply this call. Fortunately, | |
2515 | * we can use the first LSM's judgment because currently only SELinux | |
2516 | * supplies this call. | |
2517 | * | |
2518 | * For speed optimization, we explicitly break the loop rather than | |
2519 | * using the macro | |
2520 | */ | |
2521 | list_for_each_entry(hp, &security_hook_heads.xfrm_state_pol_flow_match, | |
2522 | list) { | |
2523 | rc = hp->hook.xfrm_state_pol_flow_match(x, xp, fl); | |
2524 | break; | |
2525 | } | |
2526 | return rc; | |
20510f2f JM |
2527 | } |
2528 | ||
2529 | int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid) | |
2530 | { | |
f25fce3e | 2531 | return call_int_hook(xfrm_decode_session, 0, skb, secid, 1); |
20510f2f JM |
2532 | } |
2533 | ||
2534 | void security_skb_classify_flow(struct sk_buff *skb, struct flowi *fl) | |
2535 | { | |
f25fce3e CS |
2536 | int rc = call_int_hook(xfrm_decode_session, 0, skb, &fl->flowi_secid, |
2537 | 0); | |
20510f2f JM |
2538 | |
2539 | BUG_ON(rc); | |
2540 | } | |
2541 | EXPORT_SYMBOL(security_skb_classify_flow); | |
2542 | ||
2543 | #endif /* CONFIG_SECURITY_NETWORK_XFRM */ | |
2544 | ||
2545 | #ifdef CONFIG_KEYS | |
2546 | ||
d84f4f99 DH |
2547 | int security_key_alloc(struct key *key, const struct cred *cred, |
2548 | unsigned long flags) | |
20510f2f | 2549 | { |
7a90fc39 CS |
2550 | int rc = lsm_key_alloc(key); |
2551 | ||
2552 | if (unlikely(rc)) | |
2553 | return rc; | |
2554 | rc = call_int_hook(key_alloc, 0, key, cred, flags); | |
2555 | if (unlikely(rc)) | |
2556 | security_key_free(key); | |
2557 | return rc; | |
20510f2f JM |
2558 | } |
2559 | ||
2560 | void security_key_free(struct key *key) | |
2561 | { | |
f25fce3e | 2562 | call_void_hook(key_free, key); |
7a90fc39 CS |
2563 | kfree(key->security); |
2564 | key->security = NULL; | |
20510f2f JM |
2565 | } |
2566 | ||
2567 | int security_key_permission(key_ref_t key_ref, | |
f5895943 | 2568 | const struct cred *cred, unsigned perm) |
20510f2f | 2569 | { |
f25fce3e | 2570 | return call_int_hook(key_permission, 0, key_ref, cred, perm); |
20510f2f JM |
2571 | } |
2572 | ||
70a5bb72 DH |
2573 | int security_key_getsecurity(struct key *key, char **_buffer) |
2574 | { | |
b1d9e6b0 | 2575 | *_buffer = NULL; |
f25fce3e | 2576 | return call_int_hook(key_getsecurity, 0, key, _buffer); |
70a5bb72 DH |
2577 | } |
2578 | ||
20510f2f | 2579 | #endif /* CONFIG_KEYS */ |
03d37d25 AD |
2580 | |
2581 | #ifdef CONFIG_AUDIT | |
2582 | ||
2583 | int security_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule) | |
2584 | { | |
f25fce3e | 2585 | return call_int_hook(audit_rule_init, 0, field, op, rulestr, lsmrule); |
03d37d25 AD |
2586 | } |
2587 | ||
2588 | int security_audit_rule_known(struct audit_krule *krule) | |
2589 | { | |
f25fce3e | 2590 | return call_int_hook(audit_rule_known, 0, krule); |
03d37d25 AD |
2591 | } |
2592 | ||
2593 | void security_audit_rule_free(void *lsmrule) | |
2594 | { | |
f25fce3e | 2595 | call_void_hook(audit_rule_free, lsmrule); |
03d37d25 AD |
2596 | } |
2597 | ||
2598 | int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule, | |
2599 | struct audit_context *actx) | |
2600 | { | |
f25fce3e CS |
2601 | return call_int_hook(audit_rule_match, 0, secid, field, op, lsmrule, |
2602 | actx); | |
03d37d25 | 2603 | } |
b1d9e6b0 | 2604 | #endif /* CONFIG_AUDIT */ |
afdb09c7 CF |
2605 | |
2606 | #ifdef CONFIG_BPF_SYSCALL | |
2607 | int security_bpf(int cmd, union bpf_attr *attr, unsigned int size) | |
2608 | { | |
2609 | return call_int_hook(bpf, 0, cmd, attr, size); | |
2610 | } | |
2611 | int security_bpf_map(struct bpf_map *map, fmode_t fmode) | |
2612 | { | |
2613 | return call_int_hook(bpf_map, 0, map, fmode); | |
2614 | } | |
2615 | int security_bpf_prog(struct bpf_prog *prog) | |
2616 | { | |
2617 | return call_int_hook(bpf_prog, 0, prog); | |
2618 | } | |
2619 | int security_bpf_map_alloc(struct bpf_map *map) | |
2620 | { | |
2621 | return call_int_hook(bpf_map_alloc_security, 0, map); | |
2622 | } | |
2623 | int security_bpf_prog_alloc(struct bpf_prog_aux *aux) | |
2624 | { | |
2625 | return call_int_hook(bpf_prog_alloc_security, 0, aux); | |
2626 | } | |
2627 | void security_bpf_map_free(struct bpf_map *map) | |
2628 | { | |
2629 | call_void_hook(bpf_map_free_security, map); | |
2630 | } | |
2631 | void security_bpf_prog_free(struct bpf_prog_aux *aux) | |
2632 | { | |
2633 | call_void_hook(bpf_prog_free_security, aux); | |
2634 | } | |
2635 | #endif /* CONFIG_BPF_SYSCALL */ |