security: introduce kernel_module_from_file hook
[linux-3.10.git] / security / security.c
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/module.h>
16 #include <linux/init.h>
17 #include <linux/kernel.h>
18 #include <linux/security.h>
19 #include <linux/integrity.h>
20 #include <linux/ima.h>
21 #include <linux/evm.h>
22 #include <linux/fsnotify.h>
23 #include <linux/mman.h>
24 #include <linux/mount.h>
25 #include <linux/personality.h>
26 #include <linux/backing-dev.h>
27 #include <net/flow.h>
28
29 #define MAX_LSM_EVM_XATTR       2
30
31 /* Boot-time LSM user choice */
32 static __initdata char chosen_lsm[SECURITY_NAME_MAX + 1] =
33         CONFIG_DEFAULT_SECURITY;
34
35 static struct security_operations *security_ops;
36 static struct security_operations default_security_ops = {
37         .name   = "default",
38 };
39
40 static inline int __init verify(struct security_operations *ops)
41 {
42         /* verify the security_operations structure exists */
43         if (!ops)
44                 return -EINVAL;
45         security_fixup_ops(ops);
46         return 0;
47 }
48
49 static void __init do_security_initcalls(void)
50 {
51         initcall_t *call;
52         call = __security_initcall_start;
53         while (call < __security_initcall_end) {
54                 (*call) ();
55                 call++;
56         }
57 }
58
59 /**
60  * security_init - initializes the security framework
61  *
62  * This should be called early in the kernel initialization sequence.
63  */
64 int __init security_init(void)
65 {
66         printk(KERN_INFO "Security Framework initialized\n");
67
68         security_fixup_ops(&default_security_ops);
69         security_ops = &default_security_ops;
70         do_security_initcalls();
71
72         return 0;
73 }
74
75 void reset_security_ops(void)
76 {
77         security_ops = &default_security_ops;
78 }
79
80 /* Save user chosen LSM */
81 static int __init choose_lsm(char *str)
82 {
83         strncpy(chosen_lsm, str, SECURITY_NAME_MAX);
84         return 1;
85 }
86 __setup("security=", choose_lsm);
87
88 /**
89  * security_module_enable - Load given security module on boot ?
90  * @ops: a pointer to the struct security_operations that is to be checked.
91  *
92  * Each LSM must pass this method before registering its own operations
93  * to avoid security registration races. This method may also be used
94  * to check if your LSM is currently loaded during kernel initialization.
95  *
96  * Return true if:
97  *      -The passed LSM is the one chosen by user at boot time,
98  *      -or the passed LSM is configured as the default and the user did not
99  *       choose an alternate LSM at boot time.
100  * Otherwise, return false.
101  */
102 int __init security_module_enable(struct security_operations *ops)
103 {
104         return !strcmp(ops->name, chosen_lsm);
105 }
106
107 /**
108  * register_security - registers a security framework with the kernel
109  * @ops: a pointer to the struct security_options that is to be registered
110  *
111  * This function allows a security module to register itself with the
112  * kernel security subsystem.  Some rudimentary checking is done on the @ops
113  * value passed to this function. You'll need to check first if your LSM
114  * is allowed to register its @ops by calling security_module_enable(@ops).
115  *
116  * If there is already a security module registered with the kernel,
117  * an error will be returned.  Otherwise %0 is returned on success.
118  */
119 int __init register_security(struct security_operations *ops)
120 {
121         if (verify(ops)) {
122                 printk(KERN_DEBUG "%s could not verify "
123                        "security_operations structure.\n", __func__);
124                 return -EINVAL;
125         }
126
127         if (security_ops != &default_security_ops)
128                 return -EAGAIN;
129
130         security_ops = ops;
131
132         return 0;
133 }
134
135 /* Security operations */
136
137 int security_ptrace_access_check(struct task_struct *child, unsigned int mode)
138 {
139 #ifdef CONFIG_SECURITY_YAMA_STACKED
140         int rc;
141         rc = yama_ptrace_access_check(child, mode);
142         if (rc)
143                 return rc;
144 #endif
145         return security_ops->ptrace_access_check(child, mode);
146 }
147
148 int security_ptrace_traceme(struct task_struct *parent)
149 {
150 #ifdef CONFIG_SECURITY_YAMA_STACKED
151         int rc;
152         rc = yama_ptrace_traceme(parent);
153         if (rc)
154                 return rc;
155 #endif
156         return security_ops->ptrace_traceme(parent);
157 }
158
159 int security_capget(struct task_struct *target,
160                      kernel_cap_t *effective,
161                      kernel_cap_t *inheritable,
162                      kernel_cap_t *permitted)
163 {
164         return security_ops->capget(target, effective, inheritable, permitted);
165 }
166
167 int security_capset(struct cred *new, const struct cred *old,
168                     const kernel_cap_t *effective,
169                     const kernel_cap_t *inheritable,
170                     const kernel_cap_t *permitted)
171 {
172         return security_ops->capset(new, old,
173                                     effective, inheritable, permitted);
174 }
175
176 int security_capable(const struct cred *cred, struct user_namespace *ns,
177                      int cap)
178 {
179         return security_ops->capable(cred, ns, cap, SECURITY_CAP_AUDIT);
180 }
181
182 int security_capable_noaudit(const struct cred *cred, struct user_namespace *ns,
183                              int cap)
184 {
185         return security_ops->capable(cred, ns, cap, SECURITY_CAP_NOAUDIT);
186 }
187
188 int security_quotactl(int cmds, int type, int id, struct super_block *sb)
189 {
190         return security_ops->quotactl(cmds, type, id, sb);
191 }
192
193 int security_quota_on(struct dentry *dentry)
194 {
195         return security_ops->quota_on(dentry);
196 }
197
198 int security_syslog(int type)
199 {
200         return security_ops->syslog(type);
201 }
202
203 int security_settime(const struct timespec *ts, const struct timezone *tz)
204 {
205         return security_ops->settime(ts, tz);
206 }
207
208 int security_vm_enough_memory_mm(struct mm_struct *mm, long pages)
209 {
210         return security_ops->vm_enough_memory(mm, pages);
211 }
212
213 int security_bprm_set_creds(struct linux_binprm *bprm)
214 {
215         return security_ops->bprm_set_creds(bprm);
216 }
217
218 int security_bprm_check(struct linux_binprm *bprm)
219 {
220         int ret;
221
222         ret = security_ops->bprm_check_security(bprm);
223         if (ret)
224                 return ret;
225         return ima_bprm_check(bprm);
226 }
227
228 void security_bprm_committing_creds(struct linux_binprm *bprm)
229 {
230         security_ops->bprm_committing_creds(bprm);
231 }
232
233 void security_bprm_committed_creds(struct linux_binprm *bprm)
234 {
235         security_ops->bprm_committed_creds(bprm);
236 }
237
238 int security_bprm_secureexec(struct linux_binprm *bprm)
239 {
240         return security_ops->bprm_secureexec(bprm);
241 }
242
243 int security_sb_alloc(struct super_block *sb)
244 {
245         return security_ops->sb_alloc_security(sb);
246 }
247
248 void security_sb_free(struct super_block *sb)
249 {
250         security_ops->sb_free_security(sb);
251 }
252
253 int security_sb_copy_data(char *orig, char *copy)
254 {
255         return security_ops->sb_copy_data(orig, copy);
256 }
257 EXPORT_SYMBOL(security_sb_copy_data);
258
259 int security_sb_remount(struct super_block *sb, void *data)
260 {
261         return security_ops->sb_remount(sb, data);
262 }
263
264 int security_sb_kern_mount(struct super_block *sb, int flags, void *data)
265 {
266         return security_ops->sb_kern_mount(sb, flags, data);
267 }
268
269 int security_sb_show_options(struct seq_file *m, struct super_block *sb)
270 {
271         return security_ops->sb_show_options(m, sb);
272 }
273
274 int security_sb_statfs(struct dentry *dentry)
275 {
276         return security_ops->sb_statfs(dentry);
277 }
278
279 int security_sb_mount(const char *dev_name, struct path *path,
280                        const char *type, unsigned long flags, void *data)
281 {
282         return security_ops->sb_mount(dev_name, path, type, flags, data);
283 }
284
285 int security_sb_umount(struct vfsmount *mnt, int flags)
286 {
287         return security_ops->sb_umount(mnt, flags);
288 }
289
290 int security_sb_pivotroot(struct path *old_path, struct path *new_path)
291 {
292         return security_ops->sb_pivotroot(old_path, new_path);
293 }
294
295 int security_sb_set_mnt_opts(struct super_block *sb,
296                                 struct security_mnt_opts *opts)
297 {
298         return security_ops->sb_set_mnt_opts(sb, opts);
299 }
300 EXPORT_SYMBOL(security_sb_set_mnt_opts);
301
302 void security_sb_clone_mnt_opts(const struct super_block *oldsb,
303                                 struct super_block *newsb)
304 {
305         security_ops->sb_clone_mnt_opts(oldsb, newsb);
306 }
307 EXPORT_SYMBOL(security_sb_clone_mnt_opts);
308
309 int security_sb_parse_opts_str(char *options, struct security_mnt_opts *opts)
310 {
311         return security_ops->sb_parse_opts_str(options, opts);
312 }
313 EXPORT_SYMBOL(security_sb_parse_opts_str);
314
315 int security_inode_alloc(struct inode *inode)
316 {
317         inode->i_security = NULL;
318         return security_ops->inode_alloc_security(inode);
319 }
320
321 void security_inode_free(struct inode *inode)
322 {
323         integrity_inode_free(inode);
324         security_ops->inode_free_security(inode);
325 }
326
327 int security_inode_init_security(struct inode *inode, struct inode *dir,
328                                  const struct qstr *qstr,
329                                  const initxattrs initxattrs, void *fs_data)
330 {
331         struct xattr new_xattrs[MAX_LSM_EVM_XATTR + 1];
332         struct xattr *lsm_xattr, *evm_xattr, *xattr;
333         int ret;
334
335         if (unlikely(IS_PRIVATE(inode)))
336                 return 0;
337
338         memset(new_xattrs, 0, sizeof new_xattrs);
339         if (!initxattrs)
340                 return security_ops->inode_init_security(inode, dir, qstr,
341                                                          NULL, NULL, NULL);
342         lsm_xattr = new_xattrs;
343         ret = security_ops->inode_init_security(inode, dir, qstr,
344                                                 &lsm_xattr->name,
345                                                 &lsm_xattr->value,
346                                                 &lsm_xattr->value_len);
347         if (ret)
348                 goto out;
349
350         evm_xattr = lsm_xattr + 1;
351         ret = evm_inode_init_security(inode, lsm_xattr, evm_xattr);
352         if (ret)
353                 goto out;
354         ret = initxattrs(inode, new_xattrs, fs_data);
355 out:
356         for (xattr = new_xattrs; xattr->name != NULL; xattr++) {
357                 kfree(xattr->name);
358                 kfree(xattr->value);
359         }
360         return (ret == -EOPNOTSUPP) ? 0 : ret;
361 }
362 EXPORT_SYMBOL(security_inode_init_security);
363
364 int security_old_inode_init_security(struct inode *inode, struct inode *dir,
365                                      const struct qstr *qstr, char **name,
366                                      void **value, size_t *len)
367 {
368         if (unlikely(IS_PRIVATE(inode)))
369                 return -EOPNOTSUPP;
370         return security_ops->inode_init_security(inode, dir, qstr, name, value,
371                                                  len);
372 }
373 EXPORT_SYMBOL(security_old_inode_init_security);
374
375 #ifdef CONFIG_SECURITY_PATH
376 int security_path_mknod(struct path *dir, struct dentry *dentry, umode_t mode,
377                         unsigned int dev)
378 {
379         if (unlikely(IS_PRIVATE(dir->dentry->d_inode)))
380                 return 0;
381         return security_ops->path_mknod(dir, dentry, mode, dev);
382 }
383 EXPORT_SYMBOL(security_path_mknod);
384
385 int security_path_mkdir(struct path *dir, struct dentry *dentry, umode_t mode)
386 {
387         if (unlikely(IS_PRIVATE(dir->dentry->d_inode)))
388                 return 0;
389         return security_ops->path_mkdir(dir, dentry, mode);
390 }
391 EXPORT_SYMBOL(security_path_mkdir);
392
393 int security_path_rmdir(struct path *dir, struct dentry *dentry)
394 {
395         if (unlikely(IS_PRIVATE(dir->dentry->d_inode)))
396                 return 0;
397         return security_ops->path_rmdir(dir, dentry);
398 }
399
400 int security_path_unlink(struct path *dir, struct dentry *dentry)
401 {
402         if (unlikely(IS_PRIVATE(dir->dentry->d_inode)))
403                 return 0;
404         return security_ops->path_unlink(dir, dentry);
405 }
406 EXPORT_SYMBOL(security_path_unlink);
407
408 int security_path_symlink(struct path *dir, struct dentry *dentry,
409                           const char *old_name)
410 {
411         if (unlikely(IS_PRIVATE(dir->dentry->d_inode)))
412                 return 0;
413         return security_ops->path_symlink(dir, dentry, old_name);
414 }
415
416 int security_path_link(struct dentry *old_dentry, struct path *new_dir,
417                        struct dentry *new_dentry)
418 {
419         if (unlikely(IS_PRIVATE(old_dentry->d_inode)))
420                 return 0;
421         return security_ops->path_link(old_dentry, new_dir, new_dentry);
422 }
423
424 int security_path_rename(struct path *old_dir, struct dentry *old_dentry,
425                          struct path *new_dir, struct dentry *new_dentry)
426 {
427         if (unlikely(IS_PRIVATE(old_dentry->d_inode) ||
428                      (new_dentry->d_inode && IS_PRIVATE(new_dentry->d_inode))))
429                 return 0;
430         return security_ops->path_rename(old_dir, old_dentry, new_dir,
431                                          new_dentry);
432 }
433 EXPORT_SYMBOL(security_path_rename);
434
435 int security_path_truncate(struct path *path)
436 {
437         if (unlikely(IS_PRIVATE(path->dentry->d_inode)))
438                 return 0;
439         return security_ops->path_truncate(path);
440 }
441
442 int security_path_chmod(struct path *path, umode_t mode)
443 {
444         if (unlikely(IS_PRIVATE(path->dentry->d_inode)))
445                 return 0;
446         return security_ops->path_chmod(path, mode);
447 }
448
449 int security_path_chown(struct path *path, kuid_t uid, kgid_t gid)
450 {
451         if (unlikely(IS_PRIVATE(path->dentry->d_inode)))
452                 return 0;
453         return security_ops->path_chown(path, uid, gid);
454 }
455
456 int security_path_chroot(struct path *path)
457 {
458         return security_ops->path_chroot(path);
459 }
460 #endif
461
462 int security_inode_create(struct inode *dir, struct dentry *dentry, umode_t mode)
463 {
464         if (unlikely(IS_PRIVATE(dir)))
465                 return 0;
466         return security_ops->inode_create(dir, dentry, mode);
467 }
468 EXPORT_SYMBOL_GPL(security_inode_create);
469
470 int security_inode_link(struct dentry *old_dentry, struct inode *dir,
471                          struct dentry *new_dentry)
472 {
473         if (unlikely(IS_PRIVATE(old_dentry->d_inode)))
474                 return 0;
475         return security_ops->inode_link(old_dentry, dir, new_dentry);
476 }
477
478 int security_inode_unlink(struct inode *dir, struct dentry *dentry)
479 {
480         if (unlikely(IS_PRIVATE(dentry->d_inode)))
481                 return 0;
482         return security_ops->inode_unlink(dir, dentry);
483 }
484
485 int security_inode_symlink(struct inode *dir, struct dentry *dentry,
486                             const char *old_name)
487 {
488         if (unlikely(IS_PRIVATE(dir)))
489                 return 0;
490         return security_ops->inode_symlink(dir, dentry, old_name);
491 }
492
493 int security_inode_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
494 {
495         if (unlikely(IS_PRIVATE(dir)))
496                 return 0;
497         return security_ops->inode_mkdir(dir, dentry, mode);
498 }
499 EXPORT_SYMBOL_GPL(security_inode_mkdir);
500
501 int security_inode_rmdir(struct inode *dir, struct dentry *dentry)
502 {
503         if (unlikely(IS_PRIVATE(dentry->d_inode)))
504                 return 0;
505         return security_ops->inode_rmdir(dir, dentry);
506 }
507
508 int security_inode_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev)
509 {
510         if (unlikely(IS_PRIVATE(dir)))
511                 return 0;
512         return security_ops->inode_mknod(dir, dentry, mode, dev);
513 }
514
515 int security_inode_rename(struct inode *old_dir, struct dentry *old_dentry,
516                            struct inode *new_dir, struct dentry *new_dentry)
517 {
518         if (unlikely(IS_PRIVATE(old_dentry->d_inode) ||
519             (new_dentry->d_inode && IS_PRIVATE(new_dentry->d_inode))))
520                 return 0;
521         return security_ops->inode_rename(old_dir, old_dentry,
522                                            new_dir, new_dentry);
523 }
524
525 int security_inode_readlink(struct dentry *dentry)
526 {
527         if (unlikely(IS_PRIVATE(dentry->d_inode)))
528                 return 0;
529         return security_ops->inode_readlink(dentry);
530 }
531
532 int security_inode_follow_link(struct dentry *dentry, struct nameidata *nd)
533 {
534         if (unlikely(IS_PRIVATE(dentry->d_inode)))
535                 return 0;
536         return security_ops->inode_follow_link(dentry, nd);
537 }
538
539 int security_inode_permission(struct inode *inode, int mask)
540 {
541         if (unlikely(IS_PRIVATE(inode)))
542                 return 0;
543         return security_ops->inode_permission(inode, mask);
544 }
545
546 int security_inode_setattr(struct dentry *dentry, struct iattr *attr)
547 {
548         int ret;
549
550         if (unlikely(IS_PRIVATE(dentry->d_inode)))
551                 return 0;
552         ret = security_ops->inode_setattr(dentry, attr);
553         if (ret)
554                 return ret;
555         return evm_inode_setattr(dentry, attr);
556 }
557 EXPORT_SYMBOL_GPL(security_inode_setattr);
558
559 int security_inode_getattr(struct vfsmount *mnt, struct dentry *dentry)
560 {
561         if (unlikely(IS_PRIVATE(dentry->d_inode)))
562                 return 0;
563         return security_ops->inode_getattr(mnt, dentry);
564 }
565
566 int security_inode_setxattr(struct dentry *dentry, const char *name,
567                             const void *value, size_t size, int flags)
568 {
569         int ret;
570
571         if (unlikely(IS_PRIVATE(dentry->d_inode)))
572                 return 0;
573         ret = security_ops->inode_setxattr(dentry, name, value, size, flags);
574         if (ret)
575                 return ret;
576         ret = ima_inode_setxattr(dentry, name, value, size);
577         if (ret)
578                 return ret;
579         return evm_inode_setxattr(dentry, name, value, size);
580 }
581
582 void security_inode_post_setxattr(struct dentry *dentry, const char *name,
583                                   const void *value, size_t size, int flags)
584 {
585         if (unlikely(IS_PRIVATE(dentry->d_inode)))
586                 return;
587         security_ops->inode_post_setxattr(dentry, name, value, size, flags);
588         evm_inode_post_setxattr(dentry, name, value, size);
589 }
590
591 int security_inode_getxattr(struct dentry *dentry, const char *name)
592 {
593         if (unlikely(IS_PRIVATE(dentry->d_inode)))
594                 return 0;
595         return security_ops->inode_getxattr(dentry, name);
596 }
597
598 int security_inode_listxattr(struct dentry *dentry)
599 {
600         if (unlikely(IS_PRIVATE(dentry->d_inode)))
601                 return 0;
602         return security_ops->inode_listxattr(dentry);
603 }
604
605 int security_inode_removexattr(struct dentry *dentry, const char *name)
606 {
607         int ret;
608
609         if (unlikely(IS_PRIVATE(dentry->d_inode)))
610                 return 0;
611         ret = security_ops->inode_removexattr(dentry, name);
612         if (ret)
613                 return ret;
614         ret = ima_inode_removexattr(dentry, name);
615         if (ret)
616                 return ret;
617         return evm_inode_removexattr(dentry, name);
618 }
619
620 int security_inode_need_killpriv(struct dentry *dentry)
621 {
622         return security_ops->inode_need_killpriv(dentry);
623 }
624
625 int security_inode_killpriv(struct dentry *dentry)
626 {
627         return security_ops->inode_killpriv(dentry);
628 }
629
630 int security_inode_getsecurity(const struct inode *inode, const char *name, void **buffer, bool alloc)
631 {
632         if (unlikely(IS_PRIVATE(inode)))
633                 return -EOPNOTSUPP;
634         return security_ops->inode_getsecurity(inode, name, buffer, alloc);
635 }
636
637 int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags)
638 {
639         if (unlikely(IS_PRIVATE(inode)))
640                 return -EOPNOTSUPP;
641         return security_ops->inode_setsecurity(inode, name, value, size, flags);
642 }
643
644 int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
645 {
646         if (unlikely(IS_PRIVATE(inode)))
647                 return 0;
648         return security_ops->inode_listsecurity(inode, buffer, buffer_size);
649 }
650
651 void security_inode_getsecid(const struct inode *inode, u32 *secid)
652 {
653         security_ops->inode_getsecid(inode, secid);
654 }
655
656 int security_file_permission(struct file *file, int mask)
657 {
658         int ret;
659
660         ret = security_ops->file_permission(file, mask);
661         if (ret)
662                 return ret;
663
664         return fsnotify_perm(file, mask);
665 }
666
667 int security_file_alloc(struct file *file)
668 {
669         return security_ops->file_alloc_security(file);
670 }
671
672 void security_file_free(struct file *file)
673 {
674         security_ops->file_free_security(file);
675 }
676
677 int security_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
678 {
679         return security_ops->file_ioctl(file, cmd, arg);
680 }
681
682 static inline unsigned long mmap_prot(struct file *file, unsigned long prot)
683 {
684         /*
685          * Does we have PROT_READ and does the application expect
686          * it to imply PROT_EXEC?  If not, nothing to talk about...
687          */
688         if ((prot & (PROT_READ | PROT_EXEC)) != PROT_READ)
689                 return prot;
690         if (!(current->personality & READ_IMPLIES_EXEC))
691                 return prot;
692         /*
693          * if that's an anonymous mapping, let it.
694          */
695         if (!file)
696                 return prot | PROT_EXEC;
697         /*
698          * ditto if it's not on noexec mount, except that on !MMU we need
699          * BDI_CAP_EXEC_MMAP (== VM_MAYEXEC) in this case
700          */
701         if (!(file->f_path.mnt->mnt_flags & MNT_NOEXEC)) {
702 #ifndef CONFIG_MMU
703                 unsigned long caps = 0;
704                 struct address_space *mapping = file->f_mapping;
705                 if (mapping && mapping->backing_dev_info)
706                         caps = mapping->backing_dev_info->capabilities;
707                 if (!(caps & BDI_CAP_EXEC_MAP))
708                         return prot;
709 #endif
710                 return prot | PROT_EXEC;
711         }
712         /* anything on noexec mount won't get PROT_EXEC */
713         return prot;
714 }
715
716 int security_mmap_file(struct file *file, unsigned long prot,
717                         unsigned long flags)
718 {
719         int ret;
720         ret = security_ops->mmap_file(file, prot,
721                                         mmap_prot(file, prot), flags);
722         if (ret)
723                 return ret;
724         return ima_file_mmap(file, prot);
725 }
726
727 int security_mmap_addr(unsigned long addr)
728 {
729         return security_ops->mmap_addr(addr);
730 }
731
732 int security_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot,
733                             unsigned long prot)
734 {
735         return security_ops->file_mprotect(vma, reqprot, prot);
736 }
737
738 int security_file_lock(struct file *file, unsigned int cmd)
739 {
740         return security_ops->file_lock(file, cmd);
741 }
742
743 int security_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg)
744 {
745         return security_ops->file_fcntl(file, cmd, arg);
746 }
747
748 int security_file_set_fowner(struct file *file)
749 {
750         return security_ops->file_set_fowner(file);
751 }
752
753 int security_file_send_sigiotask(struct task_struct *tsk,
754                                   struct fown_struct *fown, int sig)
755 {
756         return security_ops->file_send_sigiotask(tsk, fown, sig);
757 }
758
759 int security_file_receive(struct file *file)
760 {
761         return security_ops->file_receive(file);
762 }
763
764 int security_file_open(struct file *file, const struct cred *cred)
765 {
766         int ret;
767
768         ret = security_ops->file_open(file, cred);
769         if (ret)
770                 return ret;
771
772         return fsnotify_perm(file, MAY_OPEN);
773 }
774
775 int security_task_create(unsigned long clone_flags)
776 {
777         return security_ops->task_create(clone_flags);
778 }
779
780 void security_task_free(struct task_struct *task)
781 {
782 #ifdef CONFIG_SECURITY_YAMA_STACKED
783         yama_task_free(task);
784 #endif
785         security_ops->task_free(task);
786 }
787
788 int security_cred_alloc_blank(struct cred *cred, gfp_t gfp)
789 {
790         return security_ops->cred_alloc_blank(cred, gfp);
791 }
792
793 void security_cred_free(struct cred *cred)
794 {
795         security_ops->cred_free(cred);
796 }
797
798 int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp)
799 {
800         return security_ops->cred_prepare(new, old, gfp);
801 }
802
803 void security_transfer_creds(struct cred *new, const struct cred *old)
804 {
805         security_ops->cred_transfer(new, old);
806 }
807
808 int security_kernel_act_as(struct cred *new, u32 secid)
809 {
810         return security_ops->kernel_act_as(new, secid);
811 }
812
813 int security_kernel_create_files_as(struct cred *new, struct inode *inode)
814 {
815         return security_ops->kernel_create_files_as(new, inode);
816 }
817
818 int security_kernel_module_request(char *kmod_name)
819 {
820         return security_ops->kernel_module_request(kmod_name);
821 }
822
823 int security_kernel_module_from_file(struct file *file)
824 {
825         return security_ops->kernel_module_from_file(file);
826 }
827
828 int security_task_fix_setuid(struct cred *new, const struct cred *old,
829                              int flags)
830 {
831         return security_ops->task_fix_setuid(new, old, flags);
832 }
833
834 int security_task_setpgid(struct task_struct *p, pid_t pgid)
835 {
836         return security_ops->task_setpgid(p, pgid);
837 }
838
839 int security_task_getpgid(struct task_struct *p)
840 {
841         return security_ops->task_getpgid(p);
842 }
843
844 int security_task_getsid(struct task_struct *p)
845 {
846         return security_ops->task_getsid(p);
847 }
848
849 void security_task_getsecid(struct task_struct *p, u32 *secid)
850 {
851         security_ops->task_getsecid(p, secid);
852 }
853 EXPORT_SYMBOL(security_task_getsecid);
854
855 int security_task_setnice(struct task_struct *p, int nice)
856 {
857         return security_ops->task_setnice(p, nice);
858 }
859
860 int security_task_setioprio(struct task_struct *p, int ioprio)
861 {
862         return security_ops->task_setioprio(p, ioprio);
863 }
864
865 int security_task_getioprio(struct task_struct *p)
866 {
867         return security_ops->task_getioprio(p);
868 }
869
870 int security_task_setrlimit(struct task_struct *p, unsigned int resource,
871                 struct rlimit *new_rlim)
872 {
873         return security_ops->task_setrlimit(p, resource, new_rlim);
874 }
875
876 int security_task_setscheduler(struct task_struct *p)
877 {
878         return security_ops->task_setscheduler(p);
879 }
880
881 int security_task_getscheduler(struct task_struct *p)
882 {
883         return security_ops->task_getscheduler(p);
884 }
885
886 int security_task_movememory(struct task_struct *p)
887 {
888         return security_ops->task_movememory(p);
889 }
890
891 int security_task_kill(struct task_struct *p, struct siginfo *info,
892                         int sig, u32 secid)
893 {
894         return security_ops->task_kill(p, info, sig, secid);
895 }
896
897 int security_task_wait(struct task_struct *p)
898 {
899         return security_ops->task_wait(p);
900 }
901
902 int security_task_prctl(int option, unsigned long arg2, unsigned long arg3,
903                          unsigned long arg4, unsigned long arg5)
904 {
905 #ifdef CONFIG_SECURITY_YAMA_STACKED
906         int rc;
907         rc = yama_task_prctl(option, arg2, arg3, arg4, arg5);
908         if (rc != -ENOSYS)
909                 return rc;
910 #endif
911         return security_ops->task_prctl(option, arg2, arg3, arg4, arg5);
912 }
913
914 void security_task_to_inode(struct task_struct *p, struct inode *inode)
915 {
916         security_ops->task_to_inode(p, inode);
917 }
918
919 int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag)
920 {
921         return security_ops->ipc_permission(ipcp, flag);
922 }
923
924 void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid)
925 {
926         security_ops->ipc_getsecid(ipcp, secid);
927 }
928
929 int security_msg_msg_alloc(struct msg_msg *msg)
930 {
931         return security_ops->msg_msg_alloc_security(msg);
932 }
933
934 void security_msg_msg_free(struct msg_msg *msg)
935 {
936         security_ops->msg_msg_free_security(msg);
937 }
938
939 int security_msg_queue_alloc(struct msg_queue *msq)
940 {
941         return security_ops->msg_queue_alloc_security(msq);
942 }
943
944 void security_msg_queue_free(struct msg_queue *msq)
945 {
946         security_ops->msg_queue_free_security(msq);
947 }
948
949 int security_msg_queue_associate(struct msg_queue *msq, int msqflg)
950 {
951         return security_ops->msg_queue_associate(msq, msqflg);
952 }
953
954 int security_msg_queue_msgctl(struct msg_queue *msq, int cmd)
955 {
956         return security_ops->msg_queue_msgctl(msq, cmd);
957 }
958
959 int security_msg_queue_msgsnd(struct msg_queue *msq,
960                                struct msg_msg *msg, int msqflg)
961 {
962         return security_ops->msg_queue_msgsnd(msq, msg, msqflg);
963 }
964
965 int security_msg_queue_msgrcv(struct msg_queue *msq, struct msg_msg *msg,
966                                struct task_struct *target, long type, int mode)
967 {
968         return security_ops->msg_queue_msgrcv(msq, msg, target, type, mode);
969 }
970
971 int security_shm_alloc(struct shmid_kernel *shp)
972 {
973         return security_ops->shm_alloc_security(shp);
974 }
975
976 void security_shm_free(struct shmid_kernel *shp)
977 {
978         security_ops->shm_free_security(shp);
979 }
980
981 int security_shm_associate(struct shmid_kernel *shp, int shmflg)
982 {
983         return security_ops->shm_associate(shp, shmflg);
984 }
985
986 int security_shm_shmctl(struct shmid_kernel *shp, int cmd)
987 {
988         return security_ops->shm_shmctl(shp, cmd);
989 }
990
991 int security_shm_shmat(struct shmid_kernel *shp, char __user *shmaddr, int shmflg)
992 {
993         return security_ops->shm_shmat(shp, shmaddr, shmflg);
994 }
995
996 int security_sem_alloc(struct sem_array *sma)
997 {
998         return security_ops->sem_alloc_security(sma);
999 }
1000
1001 void security_sem_free(struct sem_array *sma)
1002 {
1003         security_ops->sem_free_security(sma);
1004 }
1005
1006 int security_sem_associate(struct sem_array *sma, int semflg)
1007 {
1008         return security_ops->sem_associate(sma, semflg);
1009 }
1010
1011 int security_sem_semctl(struct sem_array *sma, int cmd)
1012 {
1013         return security_ops->sem_semctl(sma, cmd);
1014 }
1015
1016 int security_sem_semop(struct sem_array *sma, struct sembuf *sops,
1017                         unsigned nsops, int alter)
1018 {
1019         return security_ops->sem_semop(sma, sops, nsops, alter);
1020 }
1021
1022 void security_d_instantiate(struct dentry *dentry, struct inode *inode)
1023 {
1024         if (unlikely(inode && IS_PRIVATE(inode)))
1025                 return;
1026         security_ops->d_instantiate(dentry, inode);
1027 }
1028 EXPORT_SYMBOL(security_d_instantiate);
1029
1030 int security_getprocattr(struct task_struct *p, char *name, char **value)
1031 {
1032         return security_ops->getprocattr(p, name, value);
1033 }
1034
1035 int security_setprocattr(struct task_struct *p, char *name, void *value, size_t size)
1036 {
1037         return security_ops->setprocattr(p, name, value, size);
1038 }
1039
1040 int security_netlink_send(struct sock *sk, struct sk_buff *skb)
1041 {
1042         return security_ops->netlink_send(sk, skb);
1043 }
1044
1045 int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
1046 {
1047         return security_ops->secid_to_secctx(secid, secdata, seclen);
1048 }
1049 EXPORT_SYMBOL(security_secid_to_secctx);
1050
1051 int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
1052 {
1053         return security_ops->secctx_to_secid(secdata, seclen, secid);
1054 }
1055 EXPORT_SYMBOL(security_secctx_to_secid);
1056
1057 void security_release_secctx(char *secdata, u32 seclen)
1058 {
1059         security_ops->release_secctx(secdata, seclen);
1060 }
1061 EXPORT_SYMBOL(security_release_secctx);
1062
1063 int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen)
1064 {
1065         return security_ops->inode_notifysecctx(inode, ctx, ctxlen);
1066 }
1067 EXPORT_SYMBOL(security_inode_notifysecctx);
1068
1069 int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen)
1070 {
1071         return security_ops->inode_setsecctx(dentry, ctx, ctxlen);
1072 }
1073 EXPORT_SYMBOL(security_inode_setsecctx);
1074
1075 int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen)
1076 {
1077         return security_ops->inode_getsecctx(inode, ctx, ctxlen);
1078 }
1079 EXPORT_SYMBOL(security_inode_getsecctx);
1080
1081 #ifdef CONFIG_SECURITY_NETWORK
1082
1083 int security_unix_stream_connect(struct sock *sock, struct sock *other, struct sock *newsk)
1084 {
1085         return security_ops->unix_stream_connect(sock, other, newsk);
1086 }
1087 EXPORT_SYMBOL(security_unix_stream_connect);
1088
1089 int security_unix_may_send(struct socket *sock,  struct socket *other)
1090 {
1091         return security_ops->unix_may_send(sock, other);
1092 }
1093 EXPORT_SYMBOL(security_unix_may_send);
1094
1095 int security_socket_create(int family, int type, int protocol, int kern)
1096 {
1097         return security_ops->socket_create(family, type, protocol, kern);
1098 }
1099
1100 int security_socket_post_create(struct socket *sock, int family,
1101                                 int type, int protocol, int kern)
1102 {
1103         return security_ops->socket_post_create(sock, family, type,
1104                                                 protocol, kern);
1105 }
1106
1107 int security_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen)
1108 {
1109         return security_ops->socket_bind(sock, address, addrlen);
1110 }
1111
1112 int security_socket_connect(struct socket *sock, struct sockaddr *address, int addrlen)
1113 {
1114         return security_ops->socket_connect(sock, address, addrlen);
1115 }
1116
1117 int security_socket_listen(struct socket *sock, int backlog)
1118 {
1119         return security_ops->socket_listen(sock, backlog);
1120 }
1121
1122 int security_socket_accept(struct socket *sock, struct socket *newsock)
1123 {
1124         return security_ops->socket_accept(sock, newsock);
1125 }
1126
1127 int security_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size)
1128 {
1129         return security_ops->socket_sendmsg(sock, msg, size);
1130 }
1131
1132 int security_socket_recvmsg(struct socket *sock, struct msghdr *msg,
1133                             int size, int flags)
1134 {
1135         return security_ops->socket_recvmsg(sock, msg, size, flags);
1136 }
1137
1138 int security_socket_getsockname(struct socket *sock)
1139 {
1140         return security_ops->socket_getsockname(sock);
1141 }
1142
1143 int security_socket_getpeername(struct socket *sock)
1144 {
1145         return security_ops->socket_getpeername(sock);
1146 }
1147
1148 int security_socket_getsockopt(struct socket *sock, int level, int optname)
1149 {
1150         return security_ops->socket_getsockopt(sock, level, optname);
1151 }
1152
1153 int security_socket_setsockopt(struct socket *sock, int level, int optname)
1154 {
1155         return security_ops->socket_setsockopt(sock, level, optname);
1156 }
1157
1158 int security_socket_shutdown(struct socket *sock, int how)
1159 {
1160         return security_ops->socket_shutdown(sock, how);
1161 }
1162
1163 int security_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
1164 {
1165         return security_ops->socket_sock_rcv_skb(sk, skb);
1166 }
1167 EXPORT_SYMBOL(security_sock_rcv_skb);
1168
1169 int security_socket_getpeersec_stream(struct socket *sock, char __user *optval,
1170                                       int __user *optlen, unsigned len)
1171 {
1172         return security_ops->socket_getpeersec_stream(sock, optval, optlen, len);
1173 }
1174
1175 int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid)
1176 {
1177         return security_ops->socket_getpeersec_dgram(sock, skb, secid);
1178 }
1179 EXPORT_SYMBOL(security_socket_getpeersec_dgram);
1180
1181 int security_sk_alloc(struct sock *sk, int family, gfp_t priority)
1182 {
1183         return security_ops->sk_alloc_security(sk, family, priority);
1184 }
1185
1186 void security_sk_free(struct sock *sk)
1187 {
1188         security_ops->sk_free_security(sk);
1189 }
1190
1191 void security_sk_clone(const struct sock *sk, struct sock *newsk)
1192 {
1193         security_ops->sk_clone_security(sk, newsk);
1194 }
1195 EXPORT_SYMBOL(security_sk_clone);
1196
1197 void security_sk_classify_flow(struct sock *sk, struct flowi *fl)
1198 {
1199         security_ops->sk_getsecid(sk, &fl->flowi_secid);
1200 }
1201 EXPORT_SYMBOL(security_sk_classify_flow);
1202
1203 void security_req_classify_flow(const struct request_sock *req, struct flowi *fl)
1204 {
1205         security_ops->req_classify_flow(req, fl);
1206 }
1207 EXPORT_SYMBOL(security_req_classify_flow);
1208
1209 void security_sock_graft(struct sock *sk, struct socket *parent)
1210 {
1211         security_ops->sock_graft(sk, parent);
1212 }
1213 EXPORT_SYMBOL(security_sock_graft);
1214
1215 int security_inet_conn_request(struct sock *sk,
1216                         struct sk_buff *skb, struct request_sock *req)
1217 {
1218         return security_ops->inet_conn_request(sk, skb, req);
1219 }
1220 EXPORT_SYMBOL(security_inet_conn_request);
1221
1222 void security_inet_csk_clone(struct sock *newsk,
1223                         const struct request_sock *req)
1224 {
1225         security_ops->inet_csk_clone(newsk, req);
1226 }
1227
1228 void security_inet_conn_established(struct sock *sk,
1229                         struct sk_buff *skb)
1230 {
1231         security_ops->inet_conn_established(sk, skb);
1232 }
1233
1234 int security_secmark_relabel_packet(u32 secid)
1235 {
1236         return security_ops->secmark_relabel_packet(secid);
1237 }
1238 EXPORT_SYMBOL(security_secmark_relabel_packet);
1239
1240 void security_secmark_refcount_inc(void)
1241 {
1242         security_ops->secmark_refcount_inc();
1243 }
1244 EXPORT_SYMBOL(security_secmark_refcount_inc);
1245
1246 void security_secmark_refcount_dec(void)
1247 {
1248         security_ops->secmark_refcount_dec();
1249 }
1250 EXPORT_SYMBOL(security_secmark_refcount_dec);
1251
1252 int security_tun_dev_create(void)
1253 {
1254         return security_ops->tun_dev_create();
1255 }
1256 EXPORT_SYMBOL(security_tun_dev_create);
1257
1258 void security_tun_dev_post_create(struct sock *sk)
1259 {
1260         return security_ops->tun_dev_post_create(sk);
1261 }
1262 EXPORT_SYMBOL(security_tun_dev_post_create);
1263
1264 int security_tun_dev_attach(struct sock *sk)
1265 {
1266         return security_ops->tun_dev_attach(sk);
1267 }
1268 EXPORT_SYMBOL(security_tun_dev_attach);
1269
1270 #endif  /* CONFIG_SECURITY_NETWORK */
1271
1272 #ifdef CONFIG_SECURITY_NETWORK_XFRM
1273
1274 int security_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp, struct xfrm_user_sec_ctx *sec_ctx)
1275 {
1276         return security_ops->xfrm_policy_alloc_security(ctxp, sec_ctx);
1277 }
1278 EXPORT_SYMBOL(security_xfrm_policy_alloc);
1279
1280 int security_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx,
1281                               struct xfrm_sec_ctx **new_ctxp)
1282 {
1283         return security_ops->xfrm_policy_clone_security(old_ctx, new_ctxp);
1284 }
1285
1286 void security_xfrm_policy_free(struct xfrm_sec_ctx *ctx)
1287 {
1288         security_ops->xfrm_policy_free_security(ctx);
1289 }
1290 EXPORT_SYMBOL(security_xfrm_policy_free);
1291
1292 int security_xfrm_policy_delete(struct xfrm_sec_ctx *ctx)
1293 {
1294         return security_ops->xfrm_policy_delete_security(ctx);
1295 }
1296
1297 int security_xfrm_state_alloc(struct xfrm_state *x, struct xfrm_user_sec_ctx *sec_ctx)
1298 {
1299         return security_ops->xfrm_state_alloc_security(x, sec_ctx, 0);
1300 }
1301 EXPORT_SYMBOL(security_xfrm_state_alloc);
1302
1303 int security_xfrm_state_alloc_acquire(struct xfrm_state *x,
1304                                       struct xfrm_sec_ctx *polsec, u32 secid)
1305 {
1306         if (!polsec)
1307                 return 0;
1308         /*
1309          * We want the context to be taken from secid which is usually
1310          * from the sock.
1311          */
1312         return security_ops->xfrm_state_alloc_security(x, NULL, secid);
1313 }
1314
1315 int security_xfrm_state_delete(struct xfrm_state *x)
1316 {
1317         return security_ops->xfrm_state_delete_security(x);
1318 }
1319 EXPORT_SYMBOL(security_xfrm_state_delete);
1320
1321 void security_xfrm_state_free(struct xfrm_state *x)
1322 {
1323         security_ops->xfrm_state_free_security(x);
1324 }
1325
1326 int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir)
1327 {
1328         return security_ops->xfrm_policy_lookup(ctx, fl_secid, dir);
1329 }
1330
1331 int security_xfrm_state_pol_flow_match(struct xfrm_state *x,
1332                                        struct xfrm_policy *xp,
1333                                        const struct flowi *fl)
1334 {
1335         return security_ops->xfrm_state_pol_flow_match(x, xp, fl);
1336 }
1337
1338 int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid)
1339 {
1340         return security_ops->xfrm_decode_session(skb, secid, 1);
1341 }
1342
1343 void security_skb_classify_flow(struct sk_buff *skb, struct flowi *fl)
1344 {
1345         int rc = security_ops->xfrm_decode_session(skb, &fl->flowi_secid, 0);
1346
1347         BUG_ON(rc);
1348 }
1349 EXPORT_SYMBOL(security_skb_classify_flow);
1350
1351 #endif  /* CONFIG_SECURITY_NETWORK_XFRM */
1352
1353 #ifdef CONFIG_KEYS
1354
1355 int security_key_alloc(struct key *key, const struct cred *cred,
1356                        unsigned long flags)
1357 {
1358         return security_ops->key_alloc(key, cred, flags);
1359 }
1360
1361 void security_key_free(struct key *key)
1362 {
1363         security_ops->key_free(key);
1364 }
1365
1366 int security_key_permission(key_ref_t key_ref,
1367                             const struct cred *cred, key_perm_t perm)
1368 {
1369         return security_ops->key_permission(key_ref, cred, perm);
1370 }
1371
1372 int security_key_getsecurity(struct key *key, char **_buffer)
1373 {
1374         return security_ops->key_getsecurity(key, _buffer);
1375 }
1376
1377 #endif  /* CONFIG_KEYS */
1378
1379 #ifdef CONFIG_AUDIT
1380
1381 int security_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule)
1382 {
1383         return security_ops->audit_rule_init(field, op, rulestr, lsmrule);
1384 }
1385
1386 int security_audit_rule_known(struct audit_krule *krule)
1387 {
1388         return security_ops->audit_rule_known(krule);
1389 }
1390
1391 void security_audit_rule_free(void *lsmrule)
1392 {
1393         security_ops->audit_rule_free(lsmrule);
1394 }
1395
1396 int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule,
1397                               struct audit_context *actx)
1398 {
1399         return security_ops->audit_rule_match(secid, field, op, lsmrule, actx);
1400 }
1401
1402 #endif /* CONFIG_AUDIT */