xref: /openbmc/linux/security/security.c (revision 232b0b08)
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>
7  *
8  *	This program is free software; you can redistribute it and/or modify
9  *	it under the terms of the GNU General Public License as published by
10  *	the Free Software Foundation; either version 2 of the License, or
11  *	(at your option) any later version.
12  */
13 
14 #include <linux/capability.h>
15 #include <linux/dcache.h>
16 #include <linux/module.h>
17 #include <linux/init.h>
18 #include <linux/kernel.h>
19 #include <linux/lsm_hooks.h>
20 #include <linux/integrity.h>
21 #include <linux/ima.h>
22 #include <linux/evm.h>
23 #include <linux/fsnotify.h>
24 #include <linux/mman.h>
25 #include <linux/mount.h>
26 #include <linux/personality.h>
27 #include <linux/backing-dev.h>
28 #include <net/flow.h>
29 
30 #define MAX_LSM_EVM_XATTR	2
31 
32 /* Maximum number of letters for an LSM name string */
33 #define SECURITY_NAME_MAX	10
34 
35 struct security_hook_heads security_hook_heads __lsm_ro_after_init;
36 char *lsm_names;
37 /* Boot-time LSM user choice */
38 static __initdata char chosen_lsm[SECURITY_NAME_MAX + 1] =
39 	CONFIG_DEFAULT_SECURITY;
40 
41 static void __init do_security_initcalls(void)
42 {
43 	initcall_t *call;
44 	call = __security_initcall_start;
45 	while (call < __security_initcall_end) {
46 		(*call) ();
47 		call++;
48 	}
49 }
50 
51 /**
52  * security_init - initializes the security framework
53  *
54  * This should be called early in the kernel initialization sequence.
55  */
56 int __init security_init(void)
57 {
58 	int i;
59 	struct list_head *list = (struct list_head *) &security_hook_heads;
60 
61 	for (i = 0; i < sizeof(security_hook_heads) / sizeof(struct list_head);
62 	     i++)
63 		INIT_LIST_HEAD(&list[i]);
64 	pr_info("Security Framework initialized\n");
65 
66 	/*
67 	 * Load minor LSMs, with the capability module always first.
68 	 */
69 	capability_add_hooks();
70 	yama_add_hooks();
71 	loadpin_add_hooks();
72 
73 	/*
74 	 * Load all the remaining security modules.
75 	 */
76 	do_security_initcalls();
77 
78 	return 0;
79 }
80 
81 /* Save user chosen LSM */
82 static int __init choose_lsm(char *str)
83 {
84 	strncpy(chosen_lsm, str, SECURITY_NAME_MAX);
85 	return 1;
86 }
87 __setup("security=", choose_lsm);
88 
89 static int lsm_append(char *new, char **result)
90 {
91 	char *cp;
92 
93 	if (*result == NULL) {
94 		*result = kstrdup(new, GFP_KERNEL);
95 	} else {
96 		cp = kasprintf(GFP_KERNEL, "%s,%s", *result, new);
97 		if (cp == NULL)
98 			return -ENOMEM;
99 		kfree(*result);
100 		*result = cp;
101 	}
102 	return 0;
103 }
104 
105 /**
106  * security_module_enable - Load given security module on boot ?
107  * @module: the name of the module
108  *
109  * Each LSM must pass this method before registering its own operations
110  * to avoid security registration races. This method may also be used
111  * to check if your LSM is currently loaded during kernel initialization.
112  *
113  * Return true if:
114  *	-The passed LSM is the one chosen by user at boot time,
115  *	-or the passed LSM is configured as the default and the user did not
116  *	 choose an alternate LSM at boot time.
117  * Otherwise, return false.
118  */
119 int __init security_module_enable(const char *module)
120 {
121 	return !strcmp(module, chosen_lsm);
122 }
123 
124 /**
125  * security_add_hooks - Add a modules hooks to the hook lists.
126  * @hooks: the hooks to add
127  * @count: the number of hooks to add
128  * @lsm: the name of the security module
129  *
130  * Each LSM has to register its hooks with the infrastructure.
131  */
132 void __init security_add_hooks(struct security_hook_list *hooks, int count,
133 				char *lsm)
134 {
135 	int i;
136 
137 	for (i = 0; i < count; i++) {
138 		hooks[i].lsm = lsm;
139 		list_add_tail_rcu(&hooks[i].list, hooks[i].head);
140 	}
141 	if (lsm_append(lsm, &lsm_names) < 0)
142 		panic("%s - Cannot get early memory.\n", __func__);
143 }
144 
145 /*
146  * Hook list operation macros.
147  *
148  * call_void_hook:
149  *	This is a hook that does not return a value.
150  *
151  * call_int_hook:
152  *	This is a hook that returns a value.
153  */
154 
155 #define call_void_hook(FUNC, ...)				\
156 	do {							\
157 		struct security_hook_list *P;			\
158 								\
159 		list_for_each_entry(P, &security_hook_heads.FUNC, list)	\
160 			P->hook.FUNC(__VA_ARGS__);		\
161 	} while (0)
162 
163 #define call_int_hook(FUNC, IRC, ...) ({			\
164 	int RC = IRC;						\
165 	do {							\
166 		struct security_hook_list *P;			\
167 								\
168 		list_for_each_entry(P, &security_hook_heads.FUNC, list) { \
169 			RC = P->hook.FUNC(__VA_ARGS__);		\
170 			if (RC != 0)				\
171 				break;				\
172 		}						\
173 	} while (0);						\
174 	RC;							\
175 })
176 
177 /* Security operations */
178 
179 int security_binder_set_context_mgr(struct task_struct *mgr)
180 {
181 	return call_int_hook(binder_set_context_mgr, 0, mgr);
182 }
183 
184 int security_binder_transaction(struct task_struct *from,
185 				struct task_struct *to)
186 {
187 	return call_int_hook(binder_transaction, 0, from, to);
188 }
189 
190 int security_binder_transfer_binder(struct task_struct *from,
191 				    struct task_struct *to)
192 {
193 	return call_int_hook(binder_transfer_binder, 0, from, to);
194 }
195 
196 int security_binder_transfer_file(struct task_struct *from,
197 				  struct task_struct *to, struct file *file)
198 {
199 	return call_int_hook(binder_transfer_file, 0, from, to, file);
200 }
201 
202 int security_ptrace_access_check(struct task_struct *child, unsigned int mode)
203 {
204 	return call_int_hook(ptrace_access_check, 0, child, mode);
205 }
206 
207 int security_ptrace_traceme(struct task_struct *parent)
208 {
209 	return call_int_hook(ptrace_traceme, 0, parent);
210 }
211 
212 int security_capget(struct task_struct *target,
213 		     kernel_cap_t *effective,
214 		     kernel_cap_t *inheritable,
215 		     kernel_cap_t *permitted)
216 {
217 	return call_int_hook(capget, 0, target,
218 				effective, inheritable, permitted);
219 }
220 
221 int security_capset(struct cred *new, const struct cred *old,
222 		    const kernel_cap_t *effective,
223 		    const kernel_cap_t *inheritable,
224 		    const kernel_cap_t *permitted)
225 {
226 	return call_int_hook(capset, 0, new, old,
227 				effective, inheritable, permitted);
228 }
229 
230 int security_capable(const struct cred *cred, struct user_namespace *ns,
231 		     int cap)
232 {
233 	return call_int_hook(capable, 0, cred, ns, cap, SECURITY_CAP_AUDIT);
234 }
235 
236 int security_capable_noaudit(const struct cred *cred, struct user_namespace *ns,
237 			     int cap)
238 {
239 	return call_int_hook(capable, 0, cred, ns, cap, SECURITY_CAP_NOAUDIT);
240 }
241 
242 int security_quotactl(int cmds, int type, int id, struct super_block *sb)
243 {
244 	return call_int_hook(quotactl, 0, cmds, type, id, sb);
245 }
246 
247 int security_quota_on(struct dentry *dentry)
248 {
249 	return call_int_hook(quota_on, 0, dentry);
250 }
251 
252 int security_syslog(int type)
253 {
254 	return call_int_hook(syslog, 0, type);
255 }
256 
257 int security_settime64(const struct timespec64 *ts, const struct timezone *tz)
258 {
259 	return call_int_hook(settime, 0, ts, tz);
260 }
261 
262 int security_vm_enough_memory_mm(struct mm_struct *mm, long pages)
263 {
264 	struct security_hook_list *hp;
265 	int cap_sys_admin = 1;
266 	int rc;
267 
268 	/*
269 	 * The module will respond with a positive value if
270 	 * it thinks the __vm_enough_memory() call should be
271 	 * made with the cap_sys_admin set. If all of the modules
272 	 * agree that it should be set it will. If any module
273 	 * thinks it should not be set it won't.
274 	 */
275 	list_for_each_entry(hp, &security_hook_heads.vm_enough_memory, list) {
276 		rc = hp->hook.vm_enough_memory(mm, pages);
277 		if (rc <= 0) {
278 			cap_sys_admin = 0;
279 			break;
280 		}
281 	}
282 	return __vm_enough_memory(mm, pages, cap_sys_admin);
283 }
284 
285 int security_bprm_set_creds(struct linux_binprm *bprm)
286 {
287 	return call_int_hook(bprm_set_creds, 0, bprm);
288 }
289 
290 int security_bprm_check(struct linux_binprm *bprm)
291 {
292 	int ret;
293 
294 	ret = call_int_hook(bprm_check_security, 0, bprm);
295 	if (ret)
296 		return ret;
297 	return ima_bprm_check(bprm);
298 }
299 
300 void security_bprm_committing_creds(struct linux_binprm *bprm)
301 {
302 	call_void_hook(bprm_committing_creds, bprm);
303 }
304 
305 void security_bprm_committed_creds(struct linux_binprm *bprm)
306 {
307 	call_void_hook(bprm_committed_creds, bprm);
308 }
309 
310 int security_bprm_secureexec(struct linux_binprm *bprm)
311 {
312 	return call_int_hook(bprm_secureexec, 0, bprm);
313 }
314 
315 int security_sb_alloc(struct super_block *sb)
316 {
317 	return call_int_hook(sb_alloc_security, 0, sb);
318 }
319 
320 void security_sb_free(struct super_block *sb)
321 {
322 	call_void_hook(sb_free_security, sb);
323 }
324 
325 int security_sb_copy_data(char *orig, char *copy)
326 {
327 	return call_int_hook(sb_copy_data, 0, orig, copy);
328 }
329 EXPORT_SYMBOL(security_sb_copy_data);
330 
331 int security_sb_remount(struct super_block *sb, void *data)
332 {
333 	return call_int_hook(sb_remount, 0, sb, data);
334 }
335 
336 int security_sb_kern_mount(struct super_block *sb, int flags, void *data)
337 {
338 	return call_int_hook(sb_kern_mount, 0, sb, flags, data);
339 }
340 
341 int security_sb_show_options(struct seq_file *m, struct super_block *sb)
342 {
343 	return call_int_hook(sb_show_options, 0, m, sb);
344 }
345 
346 int security_sb_statfs(struct dentry *dentry)
347 {
348 	return call_int_hook(sb_statfs, 0, dentry);
349 }
350 
351 int security_sb_mount(const char *dev_name, const struct path *path,
352                        const char *type, unsigned long flags, void *data)
353 {
354 	return call_int_hook(sb_mount, 0, dev_name, path, type, flags, data);
355 }
356 
357 int security_sb_umount(struct vfsmount *mnt, int flags)
358 {
359 	return call_int_hook(sb_umount, 0, mnt, flags);
360 }
361 
362 int security_sb_pivotroot(const struct path *old_path, const struct path *new_path)
363 {
364 	return call_int_hook(sb_pivotroot, 0, old_path, new_path);
365 }
366 
367 int security_sb_set_mnt_opts(struct super_block *sb,
368 				struct security_mnt_opts *opts,
369 				unsigned long kern_flags,
370 				unsigned long *set_kern_flags)
371 {
372 	return call_int_hook(sb_set_mnt_opts,
373 				opts->num_mnt_opts ? -EOPNOTSUPP : 0, sb,
374 				opts, kern_flags, set_kern_flags);
375 }
376 EXPORT_SYMBOL(security_sb_set_mnt_opts);
377 
378 int security_sb_clone_mnt_opts(const struct super_block *oldsb,
379 				struct super_block *newsb)
380 {
381 	return call_int_hook(sb_clone_mnt_opts, 0, oldsb, newsb);
382 }
383 EXPORT_SYMBOL(security_sb_clone_mnt_opts);
384 
385 int security_sb_parse_opts_str(char *options, struct security_mnt_opts *opts)
386 {
387 	return call_int_hook(sb_parse_opts_str, 0, options, opts);
388 }
389 EXPORT_SYMBOL(security_sb_parse_opts_str);
390 
391 int security_inode_alloc(struct inode *inode)
392 {
393 	inode->i_security = NULL;
394 	return call_int_hook(inode_alloc_security, 0, inode);
395 }
396 
397 void security_inode_free(struct inode *inode)
398 {
399 	integrity_inode_free(inode);
400 	call_void_hook(inode_free_security, inode);
401 }
402 
403 int security_dentry_init_security(struct dentry *dentry, int mode,
404 					const struct qstr *name, void **ctx,
405 					u32 *ctxlen)
406 {
407 	return call_int_hook(dentry_init_security, -EOPNOTSUPP, dentry, mode,
408 				name, ctx, ctxlen);
409 }
410 EXPORT_SYMBOL(security_dentry_init_security);
411 
412 int security_dentry_create_files_as(struct dentry *dentry, int mode,
413 				    struct qstr *name,
414 				    const struct cred *old, struct cred *new)
415 {
416 	return call_int_hook(dentry_create_files_as, 0, dentry, mode,
417 				name, old, new);
418 }
419 EXPORT_SYMBOL(security_dentry_create_files_as);
420 
421 int security_inode_init_security(struct inode *inode, struct inode *dir,
422 				 const struct qstr *qstr,
423 				 const initxattrs initxattrs, void *fs_data)
424 {
425 	struct xattr new_xattrs[MAX_LSM_EVM_XATTR + 1];
426 	struct xattr *lsm_xattr, *evm_xattr, *xattr;
427 	int ret;
428 
429 	if (unlikely(IS_PRIVATE(inode)))
430 		return 0;
431 
432 	if (!initxattrs)
433 		return call_int_hook(inode_init_security, -EOPNOTSUPP, inode,
434 				     dir, qstr, NULL, NULL, NULL);
435 	memset(new_xattrs, 0, sizeof(new_xattrs));
436 	lsm_xattr = new_xattrs;
437 	ret = call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir, qstr,
438 						&lsm_xattr->name,
439 						&lsm_xattr->value,
440 						&lsm_xattr->value_len);
441 	if (ret)
442 		goto out;
443 
444 	evm_xattr = lsm_xattr + 1;
445 	ret = evm_inode_init_security(inode, lsm_xattr, evm_xattr);
446 	if (ret)
447 		goto out;
448 	ret = initxattrs(inode, new_xattrs, fs_data);
449 out:
450 	for (xattr = new_xattrs; xattr->value != NULL; xattr++)
451 		kfree(xattr->value);
452 	return (ret == -EOPNOTSUPP) ? 0 : ret;
453 }
454 EXPORT_SYMBOL(security_inode_init_security);
455 
456 int security_old_inode_init_security(struct inode *inode, struct inode *dir,
457 				     const struct qstr *qstr, const char **name,
458 				     void **value, size_t *len)
459 {
460 	if (unlikely(IS_PRIVATE(inode)))
461 		return -EOPNOTSUPP;
462 	return call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir,
463 			     qstr, name, value, len);
464 }
465 EXPORT_SYMBOL(security_old_inode_init_security);
466 
467 #ifdef CONFIG_SECURITY_PATH
468 int security_path_mknod(const struct path *dir, struct dentry *dentry, umode_t mode,
469 			unsigned int dev)
470 {
471 	if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
472 		return 0;
473 	return call_int_hook(path_mknod, 0, dir, dentry, mode, dev);
474 }
475 EXPORT_SYMBOL(security_path_mknod);
476 
477 int security_path_mkdir(const struct path *dir, struct dentry *dentry, umode_t mode)
478 {
479 	if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
480 		return 0;
481 	return call_int_hook(path_mkdir, 0, dir, dentry, mode);
482 }
483 EXPORT_SYMBOL(security_path_mkdir);
484 
485 int security_path_rmdir(const struct path *dir, struct dentry *dentry)
486 {
487 	if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
488 		return 0;
489 	return call_int_hook(path_rmdir, 0, dir, dentry);
490 }
491 
492 int security_path_unlink(const struct path *dir, struct dentry *dentry)
493 {
494 	if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
495 		return 0;
496 	return call_int_hook(path_unlink, 0, dir, dentry);
497 }
498 EXPORT_SYMBOL(security_path_unlink);
499 
500 int security_path_symlink(const struct path *dir, struct dentry *dentry,
501 			  const char *old_name)
502 {
503 	if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
504 		return 0;
505 	return call_int_hook(path_symlink, 0, dir, dentry, old_name);
506 }
507 
508 int security_path_link(struct dentry *old_dentry, const struct path *new_dir,
509 		       struct dentry *new_dentry)
510 {
511 	if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry))))
512 		return 0;
513 	return call_int_hook(path_link, 0, old_dentry, new_dir, new_dentry);
514 }
515 
516 int security_path_rename(const struct path *old_dir, struct dentry *old_dentry,
517 			 const struct path *new_dir, struct dentry *new_dentry,
518 			 unsigned int flags)
519 {
520 	if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) ||
521 		     (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry)))))
522 		return 0;
523 
524 	if (flags & RENAME_EXCHANGE) {
525 		int err = call_int_hook(path_rename, 0, new_dir, new_dentry,
526 					old_dir, old_dentry);
527 		if (err)
528 			return err;
529 	}
530 
531 	return call_int_hook(path_rename, 0, old_dir, old_dentry, new_dir,
532 				new_dentry);
533 }
534 EXPORT_SYMBOL(security_path_rename);
535 
536 int security_path_truncate(const struct path *path)
537 {
538 	if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
539 		return 0;
540 	return call_int_hook(path_truncate, 0, path);
541 }
542 
543 int security_path_chmod(const struct path *path, umode_t mode)
544 {
545 	if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
546 		return 0;
547 	return call_int_hook(path_chmod, 0, path, mode);
548 }
549 
550 int security_path_chown(const struct path *path, kuid_t uid, kgid_t gid)
551 {
552 	if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
553 		return 0;
554 	return call_int_hook(path_chown, 0, path, uid, gid);
555 }
556 
557 int security_path_chroot(const struct path *path)
558 {
559 	return call_int_hook(path_chroot, 0, path);
560 }
561 #endif
562 
563 int security_inode_create(struct inode *dir, struct dentry *dentry, umode_t mode)
564 {
565 	if (unlikely(IS_PRIVATE(dir)))
566 		return 0;
567 	return call_int_hook(inode_create, 0, dir, dentry, mode);
568 }
569 EXPORT_SYMBOL_GPL(security_inode_create);
570 
571 int security_inode_link(struct dentry *old_dentry, struct inode *dir,
572 			 struct dentry *new_dentry)
573 {
574 	if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry))))
575 		return 0;
576 	return call_int_hook(inode_link, 0, old_dentry, dir, new_dentry);
577 }
578 
579 int security_inode_unlink(struct inode *dir, struct dentry *dentry)
580 {
581 	if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
582 		return 0;
583 	return call_int_hook(inode_unlink, 0, dir, dentry);
584 }
585 
586 int security_inode_symlink(struct inode *dir, struct dentry *dentry,
587 			    const char *old_name)
588 {
589 	if (unlikely(IS_PRIVATE(dir)))
590 		return 0;
591 	return call_int_hook(inode_symlink, 0, dir, dentry, old_name);
592 }
593 
594 int security_inode_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
595 {
596 	if (unlikely(IS_PRIVATE(dir)))
597 		return 0;
598 	return call_int_hook(inode_mkdir, 0, dir, dentry, mode);
599 }
600 EXPORT_SYMBOL_GPL(security_inode_mkdir);
601 
602 int security_inode_rmdir(struct inode *dir, struct dentry *dentry)
603 {
604 	if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
605 		return 0;
606 	return call_int_hook(inode_rmdir, 0, dir, dentry);
607 }
608 
609 int security_inode_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev)
610 {
611 	if (unlikely(IS_PRIVATE(dir)))
612 		return 0;
613 	return call_int_hook(inode_mknod, 0, dir, dentry, mode, dev);
614 }
615 
616 int security_inode_rename(struct inode *old_dir, struct dentry *old_dentry,
617 			   struct inode *new_dir, struct dentry *new_dentry,
618 			   unsigned int flags)
619 {
620         if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) ||
621             (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry)))))
622 		return 0;
623 
624 	if (flags & RENAME_EXCHANGE) {
625 		int err = call_int_hook(inode_rename, 0, new_dir, new_dentry,
626 						     old_dir, old_dentry);
627 		if (err)
628 			return err;
629 	}
630 
631 	return call_int_hook(inode_rename, 0, old_dir, old_dentry,
632 					   new_dir, new_dentry);
633 }
634 
635 int security_inode_readlink(struct dentry *dentry)
636 {
637 	if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
638 		return 0;
639 	return call_int_hook(inode_readlink, 0, dentry);
640 }
641 
642 int security_inode_follow_link(struct dentry *dentry, struct inode *inode,
643 			       bool rcu)
644 {
645 	if (unlikely(IS_PRIVATE(inode)))
646 		return 0;
647 	return call_int_hook(inode_follow_link, 0, dentry, inode, rcu);
648 }
649 
650 int security_inode_permission(struct inode *inode, int mask)
651 {
652 	if (unlikely(IS_PRIVATE(inode)))
653 		return 0;
654 	return call_int_hook(inode_permission, 0, inode, mask);
655 }
656 
657 int security_inode_setattr(struct dentry *dentry, struct iattr *attr)
658 {
659 	int ret;
660 
661 	if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
662 		return 0;
663 	ret = call_int_hook(inode_setattr, 0, dentry, attr);
664 	if (ret)
665 		return ret;
666 	return evm_inode_setattr(dentry, attr);
667 }
668 EXPORT_SYMBOL_GPL(security_inode_setattr);
669 
670 int security_inode_getattr(const struct path *path)
671 {
672 	if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
673 		return 0;
674 	return call_int_hook(inode_getattr, 0, path);
675 }
676 
677 int security_inode_setxattr(struct dentry *dentry, const char *name,
678 			    const void *value, size_t size, int flags)
679 {
680 	int ret;
681 
682 	if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
683 		return 0;
684 	/*
685 	 * SELinux and Smack integrate the cap call,
686 	 * so assume that all LSMs supplying this call do so.
687 	 */
688 	ret = call_int_hook(inode_setxattr, 1, dentry, name, value, size,
689 				flags);
690 
691 	if (ret == 1)
692 		ret = cap_inode_setxattr(dentry, name, value, size, flags);
693 	if (ret)
694 		return ret;
695 	ret = ima_inode_setxattr(dentry, name, value, size);
696 	if (ret)
697 		return ret;
698 	return evm_inode_setxattr(dentry, name, value, size);
699 }
700 
701 void security_inode_post_setxattr(struct dentry *dentry, const char *name,
702 				  const void *value, size_t size, int flags)
703 {
704 	if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
705 		return;
706 	call_void_hook(inode_post_setxattr, dentry, name, value, size, flags);
707 	evm_inode_post_setxattr(dentry, name, value, size);
708 }
709 
710 int security_inode_getxattr(struct dentry *dentry, const char *name)
711 {
712 	if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
713 		return 0;
714 	return call_int_hook(inode_getxattr, 0, dentry, name);
715 }
716 
717 int security_inode_listxattr(struct dentry *dentry)
718 {
719 	if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
720 		return 0;
721 	return call_int_hook(inode_listxattr, 0, dentry);
722 }
723 
724 int security_inode_removexattr(struct dentry *dentry, const char *name)
725 {
726 	int ret;
727 
728 	if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
729 		return 0;
730 	/*
731 	 * SELinux and Smack integrate the cap call,
732 	 * so assume that all LSMs supplying this call do so.
733 	 */
734 	ret = call_int_hook(inode_removexattr, 1, dentry, name);
735 	if (ret == 1)
736 		ret = cap_inode_removexattr(dentry, name);
737 	if (ret)
738 		return ret;
739 	ret = ima_inode_removexattr(dentry, name);
740 	if (ret)
741 		return ret;
742 	return evm_inode_removexattr(dentry, name);
743 }
744 
745 int security_inode_need_killpriv(struct dentry *dentry)
746 {
747 	return call_int_hook(inode_need_killpriv, 0, dentry);
748 }
749 
750 int security_inode_killpriv(struct dentry *dentry)
751 {
752 	return call_int_hook(inode_killpriv, 0, dentry);
753 }
754 
755 int security_inode_getsecurity(struct inode *inode, const char *name, void **buffer, bool alloc)
756 {
757 	struct security_hook_list *hp;
758 	int rc;
759 
760 	if (unlikely(IS_PRIVATE(inode)))
761 		return -EOPNOTSUPP;
762 	/*
763 	 * Only one module will provide an attribute with a given name.
764 	 */
765 	list_for_each_entry(hp, &security_hook_heads.inode_getsecurity, list) {
766 		rc = hp->hook.inode_getsecurity(inode, name, buffer, alloc);
767 		if (rc != -EOPNOTSUPP)
768 			return rc;
769 	}
770 	return -EOPNOTSUPP;
771 }
772 
773 int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags)
774 {
775 	struct security_hook_list *hp;
776 	int rc;
777 
778 	if (unlikely(IS_PRIVATE(inode)))
779 		return -EOPNOTSUPP;
780 	/*
781 	 * Only one module will provide an attribute with a given name.
782 	 */
783 	list_for_each_entry(hp, &security_hook_heads.inode_setsecurity, list) {
784 		rc = hp->hook.inode_setsecurity(inode, name, value, size,
785 								flags);
786 		if (rc != -EOPNOTSUPP)
787 			return rc;
788 	}
789 	return -EOPNOTSUPP;
790 }
791 
792 int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
793 {
794 	if (unlikely(IS_PRIVATE(inode)))
795 		return 0;
796 	return call_int_hook(inode_listsecurity, 0, inode, buffer, buffer_size);
797 }
798 EXPORT_SYMBOL(security_inode_listsecurity);
799 
800 void security_inode_getsecid(struct inode *inode, u32 *secid)
801 {
802 	call_void_hook(inode_getsecid, inode, secid);
803 }
804 
805 int security_inode_copy_up(struct dentry *src, struct cred **new)
806 {
807 	return call_int_hook(inode_copy_up, 0, src, new);
808 }
809 EXPORT_SYMBOL(security_inode_copy_up);
810 
811 int security_inode_copy_up_xattr(const char *name)
812 {
813 	return call_int_hook(inode_copy_up_xattr, -EOPNOTSUPP, name);
814 }
815 EXPORT_SYMBOL(security_inode_copy_up_xattr);
816 
817 int security_file_permission(struct file *file, int mask)
818 {
819 	int ret;
820 
821 	ret = call_int_hook(file_permission, 0, file, mask);
822 	if (ret)
823 		return ret;
824 
825 	return fsnotify_perm(file, mask);
826 }
827 
828 int security_file_alloc(struct file *file)
829 {
830 	return call_int_hook(file_alloc_security, 0, file);
831 }
832 
833 void security_file_free(struct file *file)
834 {
835 	call_void_hook(file_free_security, file);
836 }
837 
838 int security_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
839 {
840 	return call_int_hook(file_ioctl, 0, file, cmd, arg);
841 }
842 
843 static inline unsigned long mmap_prot(struct file *file, unsigned long prot)
844 {
845 	/*
846 	 * Does we have PROT_READ and does the application expect
847 	 * it to imply PROT_EXEC?  If not, nothing to talk about...
848 	 */
849 	if ((prot & (PROT_READ | PROT_EXEC)) != PROT_READ)
850 		return prot;
851 	if (!(current->personality & READ_IMPLIES_EXEC))
852 		return prot;
853 	/*
854 	 * if that's an anonymous mapping, let it.
855 	 */
856 	if (!file)
857 		return prot | PROT_EXEC;
858 	/*
859 	 * ditto if it's not on noexec mount, except that on !MMU we need
860 	 * NOMMU_MAP_EXEC (== VM_MAYEXEC) in this case
861 	 */
862 	if (!path_noexec(&file->f_path)) {
863 #ifndef CONFIG_MMU
864 		if (file->f_op->mmap_capabilities) {
865 			unsigned caps = file->f_op->mmap_capabilities(file);
866 			if (!(caps & NOMMU_MAP_EXEC))
867 				return prot;
868 		}
869 #endif
870 		return prot | PROT_EXEC;
871 	}
872 	/* anything on noexec mount won't get PROT_EXEC */
873 	return prot;
874 }
875 
876 int security_mmap_file(struct file *file, unsigned long prot,
877 			unsigned long flags)
878 {
879 	int ret;
880 	ret = call_int_hook(mmap_file, 0, file, prot,
881 					mmap_prot(file, prot), flags);
882 	if (ret)
883 		return ret;
884 	return ima_file_mmap(file, prot);
885 }
886 
887 int security_mmap_addr(unsigned long addr)
888 {
889 	return call_int_hook(mmap_addr, 0, addr);
890 }
891 
892 int security_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot,
893 			    unsigned long prot)
894 {
895 	return call_int_hook(file_mprotect, 0, vma, reqprot, prot);
896 }
897 
898 int security_file_lock(struct file *file, unsigned int cmd)
899 {
900 	return call_int_hook(file_lock, 0, file, cmd);
901 }
902 
903 int security_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg)
904 {
905 	return call_int_hook(file_fcntl, 0, file, cmd, arg);
906 }
907 
908 void security_file_set_fowner(struct file *file)
909 {
910 	call_void_hook(file_set_fowner, file);
911 }
912 
913 int security_file_send_sigiotask(struct task_struct *tsk,
914 				  struct fown_struct *fown, int sig)
915 {
916 	return call_int_hook(file_send_sigiotask, 0, tsk, fown, sig);
917 }
918 
919 int security_file_receive(struct file *file)
920 {
921 	return call_int_hook(file_receive, 0, file);
922 }
923 
924 int security_file_open(struct file *file, const struct cred *cred)
925 {
926 	int ret;
927 
928 	ret = call_int_hook(file_open, 0, file, cred);
929 	if (ret)
930 		return ret;
931 
932 	return fsnotify_perm(file, MAY_OPEN);
933 }
934 
935 int security_task_create(unsigned long clone_flags)
936 {
937 	return call_int_hook(task_create, 0, clone_flags);
938 }
939 
940 int security_task_alloc(struct task_struct *task, unsigned long clone_flags)
941 {
942 	return call_int_hook(task_alloc, 0, task, clone_flags);
943 }
944 
945 void security_task_free(struct task_struct *task)
946 {
947 	call_void_hook(task_free, task);
948 }
949 
950 int security_cred_alloc_blank(struct cred *cred, gfp_t gfp)
951 {
952 	return call_int_hook(cred_alloc_blank, 0, cred, gfp);
953 }
954 
955 void security_cred_free(struct cred *cred)
956 {
957 	call_void_hook(cred_free, cred);
958 }
959 
960 int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp)
961 {
962 	return call_int_hook(cred_prepare, 0, new, old, gfp);
963 }
964 
965 void security_transfer_creds(struct cred *new, const struct cred *old)
966 {
967 	call_void_hook(cred_transfer, new, old);
968 }
969 
970 int security_kernel_act_as(struct cred *new, u32 secid)
971 {
972 	return call_int_hook(kernel_act_as, 0, new, secid);
973 }
974 
975 int security_kernel_create_files_as(struct cred *new, struct inode *inode)
976 {
977 	return call_int_hook(kernel_create_files_as, 0, new, inode);
978 }
979 
980 int security_kernel_module_request(char *kmod_name)
981 {
982 	return call_int_hook(kernel_module_request, 0, kmod_name);
983 }
984 
985 int security_kernel_read_file(struct file *file, enum kernel_read_file_id id)
986 {
987 	int ret;
988 
989 	ret = call_int_hook(kernel_read_file, 0, file, id);
990 	if (ret)
991 		return ret;
992 	return ima_read_file(file, id);
993 }
994 EXPORT_SYMBOL_GPL(security_kernel_read_file);
995 
996 int security_kernel_post_read_file(struct file *file, char *buf, loff_t size,
997 				   enum kernel_read_file_id id)
998 {
999 	int ret;
1000 
1001 	ret = call_int_hook(kernel_post_read_file, 0, file, buf, size, id);
1002 	if (ret)
1003 		return ret;
1004 	return ima_post_read_file(file, buf, size, id);
1005 }
1006 EXPORT_SYMBOL_GPL(security_kernel_post_read_file);
1007 
1008 int security_task_fix_setuid(struct cred *new, const struct cred *old,
1009 			     int flags)
1010 {
1011 	return call_int_hook(task_fix_setuid, 0, new, old, flags);
1012 }
1013 
1014 int security_task_setpgid(struct task_struct *p, pid_t pgid)
1015 {
1016 	return call_int_hook(task_setpgid, 0, p, pgid);
1017 }
1018 
1019 int security_task_getpgid(struct task_struct *p)
1020 {
1021 	return call_int_hook(task_getpgid, 0, p);
1022 }
1023 
1024 int security_task_getsid(struct task_struct *p)
1025 {
1026 	return call_int_hook(task_getsid, 0, p);
1027 }
1028 
1029 void security_task_getsecid(struct task_struct *p, u32 *secid)
1030 {
1031 	*secid = 0;
1032 	call_void_hook(task_getsecid, p, secid);
1033 }
1034 EXPORT_SYMBOL(security_task_getsecid);
1035 
1036 int security_task_setnice(struct task_struct *p, int nice)
1037 {
1038 	return call_int_hook(task_setnice, 0, p, nice);
1039 }
1040 
1041 int security_task_setioprio(struct task_struct *p, int ioprio)
1042 {
1043 	return call_int_hook(task_setioprio, 0, p, ioprio);
1044 }
1045 
1046 int security_task_getioprio(struct task_struct *p)
1047 {
1048 	return call_int_hook(task_getioprio, 0, p);
1049 }
1050 
1051 int security_task_prlimit(const struct cred *cred, const struct cred *tcred,
1052 			  unsigned int flags)
1053 {
1054 	return call_int_hook(task_prlimit, 0, cred, tcred, flags);
1055 }
1056 
1057 int security_task_setrlimit(struct task_struct *p, unsigned int resource,
1058 		struct rlimit *new_rlim)
1059 {
1060 	return call_int_hook(task_setrlimit, 0, p, resource, new_rlim);
1061 }
1062 
1063 int security_task_setscheduler(struct task_struct *p)
1064 {
1065 	return call_int_hook(task_setscheduler, 0, p);
1066 }
1067 
1068 int security_task_getscheduler(struct task_struct *p)
1069 {
1070 	return call_int_hook(task_getscheduler, 0, p);
1071 }
1072 
1073 int security_task_movememory(struct task_struct *p)
1074 {
1075 	return call_int_hook(task_movememory, 0, p);
1076 }
1077 
1078 int security_task_kill(struct task_struct *p, struct siginfo *info,
1079 			int sig, u32 secid)
1080 {
1081 	return call_int_hook(task_kill, 0, p, info, sig, secid);
1082 }
1083 
1084 int security_task_prctl(int option, unsigned long arg2, unsigned long arg3,
1085 			 unsigned long arg4, unsigned long arg5)
1086 {
1087 	int thisrc;
1088 	int rc = -ENOSYS;
1089 	struct security_hook_list *hp;
1090 
1091 	list_for_each_entry(hp, &security_hook_heads.task_prctl, list) {
1092 		thisrc = hp->hook.task_prctl(option, arg2, arg3, arg4, arg5);
1093 		if (thisrc != -ENOSYS) {
1094 			rc = thisrc;
1095 			if (thisrc != 0)
1096 				break;
1097 		}
1098 	}
1099 	return rc;
1100 }
1101 
1102 void security_task_to_inode(struct task_struct *p, struct inode *inode)
1103 {
1104 	call_void_hook(task_to_inode, p, inode);
1105 }
1106 
1107 int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag)
1108 {
1109 	return call_int_hook(ipc_permission, 0, ipcp, flag);
1110 }
1111 
1112 void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid)
1113 {
1114 	*secid = 0;
1115 	call_void_hook(ipc_getsecid, ipcp, secid);
1116 }
1117 
1118 int security_msg_msg_alloc(struct msg_msg *msg)
1119 {
1120 	return call_int_hook(msg_msg_alloc_security, 0, msg);
1121 }
1122 
1123 void security_msg_msg_free(struct msg_msg *msg)
1124 {
1125 	call_void_hook(msg_msg_free_security, msg);
1126 }
1127 
1128 int security_msg_queue_alloc(struct msg_queue *msq)
1129 {
1130 	return call_int_hook(msg_queue_alloc_security, 0, msq);
1131 }
1132 
1133 void security_msg_queue_free(struct msg_queue *msq)
1134 {
1135 	call_void_hook(msg_queue_free_security, msq);
1136 }
1137 
1138 int security_msg_queue_associate(struct msg_queue *msq, int msqflg)
1139 {
1140 	return call_int_hook(msg_queue_associate, 0, msq, msqflg);
1141 }
1142 
1143 int security_msg_queue_msgctl(struct msg_queue *msq, int cmd)
1144 {
1145 	return call_int_hook(msg_queue_msgctl, 0, msq, cmd);
1146 }
1147 
1148 int security_msg_queue_msgsnd(struct msg_queue *msq,
1149 			       struct msg_msg *msg, int msqflg)
1150 {
1151 	return call_int_hook(msg_queue_msgsnd, 0, msq, msg, msqflg);
1152 }
1153 
1154 int security_msg_queue_msgrcv(struct msg_queue *msq, struct msg_msg *msg,
1155 			       struct task_struct *target, long type, int mode)
1156 {
1157 	return call_int_hook(msg_queue_msgrcv, 0, msq, msg, target, type, mode);
1158 }
1159 
1160 int security_shm_alloc(struct shmid_kernel *shp)
1161 {
1162 	return call_int_hook(shm_alloc_security, 0, shp);
1163 }
1164 
1165 void security_shm_free(struct shmid_kernel *shp)
1166 {
1167 	call_void_hook(shm_free_security, shp);
1168 }
1169 
1170 int security_shm_associate(struct shmid_kernel *shp, int shmflg)
1171 {
1172 	return call_int_hook(shm_associate, 0, shp, shmflg);
1173 }
1174 
1175 int security_shm_shmctl(struct shmid_kernel *shp, int cmd)
1176 {
1177 	return call_int_hook(shm_shmctl, 0, shp, cmd);
1178 }
1179 
1180 int security_shm_shmat(struct shmid_kernel *shp, char __user *shmaddr, int shmflg)
1181 {
1182 	return call_int_hook(shm_shmat, 0, shp, shmaddr, shmflg);
1183 }
1184 
1185 int security_sem_alloc(struct sem_array *sma)
1186 {
1187 	return call_int_hook(sem_alloc_security, 0, sma);
1188 }
1189 
1190 void security_sem_free(struct sem_array *sma)
1191 {
1192 	call_void_hook(sem_free_security, sma);
1193 }
1194 
1195 int security_sem_associate(struct sem_array *sma, int semflg)
1196 {
1197 	return call_int_hook(sem_associate, 0, sma, semflg);
1198 }
1199 
1200 int security_sem_semctl(struct sem_array *sma, int cmd)
1201 {
1202 	return call_int_hook(sem_semctl, 0, sma, cmd);
1203 }
1204 
1205 int security_sem_semop(struct sem_array *sma, struct sembuf *sops,
1206 			unsigned nsops, int alter)
1207 {
1208 	return call_int_hook(sem_semop, 0, sma, sops, nsops, alter);
1209 }
1210 
1211 void security_d_instantiate(struct dentry *dentry, struct inode *inode)
1212 {
1213 	if (unlikely(inode && IS_PRIVATE(inode)))
1214 		return;
1215 	call_void_hook(d_instantiate, dentry, inode);
1216 }
1217 EXPORT_SYMBOL(security_d_instantiate);
1218 
1219 int security_getprocattr(struct task_struct *p, char *name, char **value)
1220 {
1221 	return call_int_hook(getprocattr, -EINVAL, p, name, value);
1222 }
1223 
1224 int security_setprocattr(const char *name, void *value, size_t size)
1225 {
1226 	return call_int_hook(setprocattr, -EINVAL, name, value, size);
1227 }
1228 
1229 int security_netlink_send(struct sock *sk, struct sk_buff *skb)
1230 {
1231 	return call_int_hook(netlink_send, 0, sk, skb);
1232 }
1233 
1234 int security_ismaclabel(const char *name)
1235 {
1236 	return call_int_hook(ismaclabel, 0, name);
1237 }
1238 EXPORT_SYMBOL(security_ismaclabel);
1239 
1240 int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
1241 {
1242 	return call_int_hook(secid_to_secctx, -EOPNOTSUPP, secid, secdata,
1243 				seclen);
1244 }
1245 EXPORT_SYMBOL(security_secid_to_secctx);
1246 
1247 int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
1248 {
1249 	*secid = 0;
1250 	return call_int_hook(secctx_to_secid, 0, secdata, seclen, secid);
1251 }
1252 EXPORT_SYMBOL(security_secctx_to_secid);
1253 
1254 void security_release_secctx(char *secdata, u32 seclen)
1255 {
1256 	call_void_hook(release_secctx, secdata, seclen);
1257 }
1258 EXPORT_SYMBOL(security_release_secctx);
1259 
1260 void security_inode_invalidate_secctx(struct inode *inode)
1261 {
1262 	call_void_hook(inode_invalidate_secctx, inode);
1263 }
1264 EXPORT_SYMBOL(security_inode_invalidate_secctx);
1265 
1266 int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen)
1267 {
1268 	return call_int_hook(inode_notifysecctx, 0, inode, ctx, ctxlen);
1269 }
1270 EXPORT_SYMBOL(security_inode_notifysecctx);
1271 
1272 int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen)
1273 {
1274 	return call_int_hook(inode_setsecctx, 0, dentry, ctx, ctxlen);
1275 }
1276 EXPORT_SYMBOL(security_inode_setsecctx);
1277 
1278 int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen)
1279 {
1280 	return call_int_hook(inode_getsecctx, -EOPNOTSUPP, inode, ctx, ctxlen);
1281 }
1282 EXPORT_SYMBOL(security_inode_getsecctx);
1283 
1284 #ifdef CONFIG_SECURITY_NETWORK
1285 
1286 int security_unix_stream_connect(struct sock *sock, struct sock *other, struct sock *newsk)
1287 {
1288 	return call_int_hook(unix_stream_connect, 0, sock, other, newsk);
1289 }
1290 EXPORT_SYMBOL(security_unix_stream_connect);
1291 
1292 int security_unix_may_send(struct socket *sock,  struct socket *other)
1293 {
1294 	return call_int_hook(unix_may_send, 0, sock, other);
1295 }
1296 EXPORT_SYMBOL(security_unix_may_send);
1297 
1298 int security_socket_create(int family, int type, int protocol, int kern)
1299 {
1300 	return call_int_hook(socket_create, 0, family, type, protocol, kern);
1301 }
1302 
1303 int security_socket_post_create(struct socket *sock, int family,
1304 				int type, int protocol, int kern)
1305 {
1306 	return call_int_hook(socket_post_create, 0, sock, family, type,
1307 						protocol, kern);
1308 }
1309 
1310 int security_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen)
1311 {
1312 	return call_int_hook(socket_bind, 0, sock, address, addrlen);
1313 }
1314 
1315 int security_socket_connect(struct socket *sock, struct sockaddr *address, int addrlen)
1316 {
1317 	return call_int_hook(socket_connect, 0, sock, address, addrlen);
1318 }
1319 
1320 int security_socket_listen(struct socket *sock, int backlog)
1321 {
1322 	return call_int_hook(socket_listen, 0, sock, backlog);
1323 }
1324 
1325 int security_socket_accept(struct socket *sock, struct socket *newsock)
1326 {
1327 	return call_int_hook(socket_accept, 0, sock, newsock);
1328 }
1329 
1330 int security_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size)
1331 {
1332 	return call_int_hook(socket_sendmsg, 0, sock, msg, size);
1333 }
1334 
1335 int security_socket_recvmsg(struct socket *sock, struct msghdr *msg,
1336 			    int size, int flags)
1337 {
1338 	return call_int_hook(socket_recvmsg, 0, sock, msg, size, flags);
1339 }
1340 
1341 int security_socket_getsockname(struct socket *sock)
1342 {
1343 	return call_int_hook(socket_getsockname, 0, sock);
1344 }
1345 
1346 int security_socket_getpeername(struct socket *sock)
1347 {
1348 	return call_int_hook(socket_getpeername, 0, sock);
1349 }
1350 
1351 int security_socket_getsockopt(struct socket *sock, int level, int optname)
1352 {
1353 	return call_int_hook(socket_getsockopt, 0, sock, level, optname);
1354 }
1355 
1356 int security_socket_setsockopt(struct socket *sock, int level, int optname)
1357 {
1358 	return call_int_hook(socket_setsockopt, 0, sock, level, optname);
1359 }
1360 
1361 int security_socket_shutdown(struct socket *sock, int how)
1362 {
1363 	return call_int_hook(socket_shutdown, 0, sock, how);
1364 }
1365 
1366 int security_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
1367 {
1368 	return call_int_hook(socket_sock_rcv_skb, 0, sk, skb);
1369 }
1370 EXPORT_SYMBOL(security_sock_rcv_skb);
1371 
1372 int security_socket_getpeersec_stream(struct socket *sock, char __user *optval,
1373 				      int __user *optlen, unsigned len)
1374 {
1375 	return call_int_hook(socket_getpeersec_stream, -ENOPROTOOPT, sock,
1376 				optval, optlen, len);
1377 }
1378 
1379 int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid)
1380 {
1381 	return call_int_hook(socket_getpeersec_dgram, -ENOPROTOOPT, sock,
1382 			     skb, secid);
1383 }
1384 EXPORT_SYMBOL(security_socket_getpeersec_dgram);
1385 
1386 int security_sk_alloc(struct sock *sk, int family, gfp_t priority)
1387 {
1388 	return call_int_hook(sk_alloc_security, 0, sk, family, priority);
1389 }
1390 
1391 void security_sk_free(struct sock *sk)
1392 {
1393 	call_void_hook(sk_free_security, sk);
1394 }
1395 
1396 void security_sk_clone(const struct sock *sk, struct sock *newsk)
1397 {
1398 	call_void_hook(sk_clone_security, sk, newsk);
1399 }
1400 EXPORT_SYMBOL(security_sk_clone);
1401 
1402 void security_sk_classify_flow(struct sock *sk, struct flowi *fl)
1403 {
1404 	call_void_hook(sk_getsecid, sk, &fl->flowi_secid);
1405 }
1406 EXPORT_SYMBOL(security_sk_classify_flow);
1407 
1408 void security_req_classify_flow(const struct request_sock *req, struct flowi *fl)
1409 {
1410 	call_void_hook(req_classify_flow, req, fl);
1411 }
1412 EXPORT_SYMBOL(security_req_classify_flow);
1413 
1414 void security_sock_graft(struct sock *sk, struct socket *parent)
1415 {
1416 	call_void_hook(sock_graft, sk, parent);
1417 }
1418 EXPORT_SYMBOL(security_sock_graft);
1419 
1420 int security_inet_conn_request(struct sock *sk,
1421 			struct sk_buff *skb, struct request_sock *req)
1422 {
1423 	return call_int_hook(inet_conn_request, 0, sk, skb, req);
1424 }
1425 EXPORT_SYMBOL(security_inet_conn_request);
1426 
1427 void security_inet_csk_clone(struct sock *newsk,
1428 			const struct request_sock *req)
1429 {
1430 	call_void_hook(inet_csk_clone, newsk, req);
1431 }
1432 
1433 void security_inet_conn_established(struct sock *sk,
1434 			struct sk_buff *skb)
1435 {
1436 	call_void_hook(inet_conn_established, sk, skb);
1437 }
1438 
1439 int security_secmark_relabel_packet(u32 secid)
1440 {
1441 	return call_int_hook(secmark_relabel_packet, 0, secid);
1442 }
1443 EXPORT_SYMBOL(security_secmark_relabel_packet);
1444 
1445 void security_secmark_refcount_inc(void)
1446 {
1447 	call_void_hook(secmark_refcount_inc);
1448 }
1449 EXPORT_SYMBOL(security_secmark_refcount_inc);
1450 
1451 void security_secmark_refcount_dec(void)
1452 {
1453 	call_void_hook(secmark_refcount_dec);
1454 }
1455 EXPORT_SYMBOL(security_secmark_refcount_dec);
1456 
1457 int security_tun_dev_alloc_security(void **security)
1458 {
1459 	return call_int_hook(tun_dev_alloc_security, 0, security);
1460 }
1461 EXPORT_SYMBOL(security_tun_dev_alloc_security);
1462 
1463 void security_tun_dev_free_security(void *security)
1464 {
1465 	call_void_hook(tun_dev_free_security, security);
1466 }
1467 EXPORT_SYMBOL(security_tun_dev_free_security);
1468 
1469 int security_tun_dev_create(void)
1470 {
1471 	return call_int_hook(tun_dev_create, 0);
1472 }
1473 EXPORT_SYMBOL(security_tun_dev_create);
1474 
1475 int security_tun_dev_attach_queue(void *security)
1476 {
1477 	return call_int_hook(tun_dev_attach_queue, 0, security);
1478 }
1479 EXPORT_SYMBOL(security_tun_dev_attach_queue);
1480 
1481 int security_tun_dev_attach(struct sock *sk, void *security)
1482 {
1483 	return call_int_hook(tun_dev_attach, 0, sk, security);
1484 }
1485 EXPORT_SYMBOL(security_tun_dev_attach);
1486 
1487 int security_tun_dev_open(void *security)
1488 {
1489 	return call_int_hook(tun_dev_open, 0, security);
1490 }
1491 EXPORT_SYMBOL(security_tun_dev_open);
1492 
1493 #endif	/* CONFIG_SECURITY_NETWORK */
1494 
1495 #ifdef CONFIG_SECURITY_NETWORK_XFRM
1496 
1497 int security_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp,
1498 			       struct xfrm_user_sec_ctx *sec_ctx,
1499 			       gfp_t gfp)
1500 {
1501 	return call_int_hook(xfrm_policy_alloc_security, 0, ctxp, sec_ctx, gfp);
1502 }
1503 EXPORT_SYMBOL(security_xfrm_policy_alloc);
1504 
1505 int security_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx,
1506 			      struct xfrm_sec_ctx **new_ctxp)
1507 {
1508 	return call_int_hook(xfrm_policy_clone_security, 0, old_ctx, new_ctxp);
1509 }
1510 
1511 void security_xfrm_policy_free(struct xfrm_sec_ctx *ctx)
1512 {
1513 	call_void_hook(xfrm_policy_free_security, ctx);
1514 }
1515 EXPORT_SYMBOL(security_xfrm_policy_free);
1516 
1517 int security_xfrm_policy_delete(struct xfrm_sec_ctx *ctx)
1518 {
1519 	return call_int_hook(xfrm_policy_delete_security, 0, ctx);
1520 }
1521 
1522 int security_xfrm_state_alloc(struct xfrm_state *x,
1523 			      struct xfrm_user_sec_ctx *sec_ctx)
1524 {
1525 	return call_int_hook(xfrm_state_alloc, 0, x, sec_ctx);
1526 }
1527 EXPORT_SYMBOL(security_xfrm_state_alloc);
1528 
1529 int security_xfrm_state_alloc_acquire(struct xfrm_state *x,
1530 				      struct xfrm_sec_ctx *polsec, u32 secid)
1531 {
1532 	return call_int_hook(xfrm_state_alloc_acquire, 0, x, polsec, secid);
1533 }
1534 
1535 int security_xfrm_state_delete(struct xfrm_state *x)
1536 {
1537 	return call_int_hook(xfrm_state_delete_security, 0, x);
1538 }
1539 EXPORT_SYMBOL(security_xfrm_state_delete);
1540 
1541 void security_xfrm_state_free(struct xfrm_state *x)
1542 {
1543 	call_void_hook(xfrm_state_free_security, x);
1544 }
1545 
1546 int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir)
1547 {
1548 	return call_int_hook(xfrm_policy_lookup, 0, ctx, fl_secid, dir);
1549 }
1550 
1551 int security_xfrm_state_pol_flow_match(struct xfrm_state *x,
1552 				       struct xfrm_policy *xp,
1553 				       const struct flowi *fl)
1554 {
1555 	struct security_hook_list *hp;
1556 	int rc = 1;
1557 
1558 	/*
1559 	 * Since this function is expected to return 0 or 1, the judgment
1560 	 * becomes difficult if multiple LSMs supply this call. Fortunately,
1561 	 * we can use the first LSM's judgment because currently only SELinux
1562 	 * supplies this call.
1563 	 *
1564 	 * For speed optimization, we explicitly break the loop rather than
1565 	 * using the macro
1566 	 */
1567 	list_for_each_entry(hp, &security_hook_heads.xfrm_state_pol_flow_match,
1568 				list) {
1569 		rc = hp->hook.xfrm_state_pol_flow_match(x, xp, fl);
1570 		break;
1571 	}
1572 	return rc;
1573 }
1574 
1575 int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid)
1576 {
1577 	return call_int_hook(xfrm_decode_session, 0, skb, secid, 1);
1578 }
1579 
1580 void security_skb_classify_flow(struct sk_buff *skb, struct flowi *fl)
1581 {
1582 	int rc = call_int_hook(xfrm_decode_session, 0, skb, &fl->flowi_secid,
1583 				0);
1584 
1585 	BUG_ON(rc);
1586 }
1587 EXPORT_SYMBOL(security_skb_classify_flow);
1588 
1589 #endif	/* CONFIG_SECURITY_NETWORK_XFRM */
1590 
1591 #ifdef CONFIG_KEYS
1592 
1593 int security_key_alloc(struct key *key, const struct cred *cred,
1594 		       unsigned long flags)
1595 {
1596 	return call_int_hook(key_alloc, 0, key, cred, flags);
1597 }
1598 
1599 void security_key_free(struct key *key)
1600 {
1601 	call_void_hook(key_free, key);
1602 }
1603 
1604 int security_key_permission(key_ref_t key_ref,
1605 			    const struct cred *cred, unsigned perm)
1606 {
1607 	return call_int_hook(key_permission, 0, key_ref, cred, perm);
1608 }
1609 
1610 int security_key_getsecurity(struct key *key, char **_buffer)
1611 {
1612 	*_buffer = NULL;
1613 	return call_int_hook(key_getsecurity, 0, key, _buffer);
1614 }
1615 
1616 #endif	/* CONFIG_KEYS */
1617 
1618 #ifdef CONFIG_AUDIT
1619 
1620 int security_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule)
1621 {
1622 	return call_int_hook(audit_rule_init, 0, field, op, rulestr, lsmrule);
1623 }
1624 
1625 int security_audit_rule_known(struct audit_krule *krule)
1626 {
1627 	return call_int_hook(audit_rule_known, 0, krule);
1628 }
1629 
1630 void security_audit_rule_free(void *lsmrule)
1631 {
1632 	call_void_hook(audit_rule_free, lsmrule);
1633 }
1634 
1635 int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule,
1636 			      struct audit_context *actx)
1637 {
1638 	return call_int_hook(audit_rule_match, 0, secid, field, op, lsmrule,
1639 				actx);
1640 }
1641 #endif /* CONFIG_AUDIT */
1642