security: remove unused sb_get_mnt_opts hook
[linux-2.6.git] / security / dummy.c
1 /*
2  * Stub functions for the default security function pointers in case no
3  * security model is loaded.
4  *
5  * Copyright (C) 2001 WireX Communications, Inc <chris@wirex.com>
6  * Copyright (C) 2001-2002  Greg Kroah-Hartman <greg@kroah.com>
7  * Copyright (C) 2001 Networks Associates Technology, Inc <ssmalley@nai.com>
8  *
9  *      This program is free software; you can redistribute it and/or modify
10  *      it under the terms of the GNU General Public License as published by
11  *      the Free Software Foundation; either version 2 of the License, or
12  *      (at your option) any later version.
13  */
14
15 #undef DEBUG
16
17 #include <linux/capability.h>
18 #include <linux/kernel.h>
19 #include <linux/mman.h>
20 #include <linux/pagemap.h>
21 #include <linux/swap.h>
22 #include <linux/security.h>
23 #include <linux/skbuff.h>
24 #include <linux/netlink.h>
25 #include <net/sock.h>
26 #include <linux/xattr.h>
27 #include <linux/hugetlb.h>
28 #include <linux/ptrace.h>
29 #include <linux/file.h>
30 #include <linux/prctl.h>
31 #include <linux/securebits.h>
32
33 static int dummy_ptrace (struct task_struct *parent, struct task_struct *child,
34                          unsigned int mode)
35 {
36         return 0;
37 }
38
39 static int dummy_capget (struct task_struct *target, kernel_cap_t * effective,
40                          kernel_cap_t * inheritable, kernel_cap_t * permitted)
41 {
42         if (target->euid == 0) {
43                 cap_set_full(*permitted);
44                 cap_set_init_eff(*effective);
45         } else {
46                 cap_clear(*permitted);
47                 cap_clear(*effective);
48         }
49
50         cap_clear(*inheritable);
51
52         if (target->fsuid != 0) {
53                 *permitted = cap_drop_fs_set(*permitted);
54                 *effective = cap_drop_fs_set(*effective);
55         }
56         return 0;
57 }
58
59 static int dummy_capset_check (struct task_struct *target,
60                                kernel_cap_t * effective,
61                                kernel_cap_t * inheritable,
62                                kernel_cap_t * permitted)
63 {
64         return -EPERM;
65 }
66
67 static void dummy_capset_set (struct task_struct *target,
68                               kernel_cap_t * effective,
69                               kernel_cap_t * inheritable,
70                               kernel_cap_t * permitted)
71 {
72         return;
73 }
74
75 static int dummy_acct (struct file *file)
76 {
77         return 0;
78 }
79
80 static int dummy_capable (struct task_struct *tsk, int cap)
81 {
82         if (cap_raised (tsk->cap_effective, cap))
83                 return 0;
84         return -EPERM;
85 }
86
87 static int dummy_sysctl (ctl_table * table, int op)
88 {
89         return 0;
90 }
91
92 static int dummy_quotactl (int cmds, int type, int id, struct super_block *sb)
93 {
94         return 0;
95 }
96
97 static int dummy_quota_on (struct dentry *dentry)
98 {
99         return 0;
100 }
101
102 static int dummy_syslog (int type)
103 {
104         if ((type != 3 && type != 10) && current->euid)
105                 return -EPERM;
106         return 0;
107 }
108
109 static int dummy_settime(struct timespec *ts, struct timezone *tz)
110 {
111         if (!capable(CAP_SYS_TIME))
112                 return -EPERM;
113         return 0;
114 }
115
116 static int dummy_vm_enough_memory(struct mm_struct *mm, long pages)
117 {
118         int cap_sys_admin = 0;
119
120         if (dummy_capable(current, CAP_SYS_ADMIN) == 0)
121                 cap_sys_admin = 1;
122         return __vm_enough_memory(mm, pages, cap_sys_admin);
123 }
124
125 static int dummy_bprm_alloc_security (struct linux_binprm *bprm)
126 {
127         return 0;
128 }
129
130 static void dummy_bprm_free_security (struct linux_binprm *bprm)
131 {
132         return;
133 }
134
135 static void dummy_bprm_apply_creds (struct linux_binprm *bprm, int unsafe)
136 {
137         if (bprm->e_uid != current->uid || bprm->e_gid != current->gid) {
138                 set_dumpable(current->mm, suid_dumpable);
139
140                 if ((unsafe & ~LSM_UNSAFE_PTRACE_CAP) && !capable(CAP_SETUID)) {
141                         bprm->e_uid = current->uid;
142                         bprm->e_gid = current->gid;
143                 }
144         }
145
146         current->suid = current->euid = current->fsuid = bprm->e_uid;
147         current->sgid = current->egid = current->fsgid = bprm->e_gid;
148
149         dummy_capget(current, &current->cap_effective, &current->cap_inheritable, &current->cap_permitted);
150 }
151
152 static void dummy_bprm_post_apply_creds (struct linux_binprm *bprm)
153 {
154         return;
155 }
156
157 static int dummy_bprm_set_security (struct linux_binprm *bprm)
158 {
159         return 0;
160 }
161
162 static int dummy_bprm_check_security (struct linux_binprm *bprm)
163 {
164         return 0;
165 }
166
167 static int dummy_bprm_secureexec (struct linux_binprm *bprm)
168 {
169         /* The new userland will simply use the value provided
170            in the AT_SECURE field to decide whether secure mode
171            is required.  Hence, this logic is required to preserve
172            the legacy decision algorithm used by the old userland. */
173         return (current->euid != current->uid ||
174                 current->egid != current->gid);
175 }
176
177 static int dummy_sb_alloc_security (struct super_block *sb)
178 {
179         return 0;
180 }
181
182 static void dummy_sb_free_security (struct super_block *sb)
183 {
184         return;
185 }
186
187 static int dummy_sb_copy_data (char *orig, char *copy)
188 {
189         return 0;
190 }
191
192 static int dummy_sb_kern_mount (struct super_block *sb, void *data)
193 {
194         return 0;
195 }
196
197 static int dummy_sb_show_options(struct seq_file *m, struct super_block *sb)
198 {
199         return 0;
200 }
201
202 static int dummy_sb_statfs (struct dentry *dentry)
203 {
204         return 0;
205 }
206
207 static int dummy_sb_mount (char *dev_name, struct path *path, char *type,
208                            unsigned long flags, void *data)
209 {
210         return 0;
211 }
212
213 static int dummy_sb_check_sb (struct vfsmount *mnt, struct path *path)
214 {
215         return 0;
216 }
217
218 static int dummy_sb_umount (struct vfsmount *mnt, int flags)
219 {
220         return 0;
221 }
222
223 static void dummy_sb_umount_close (struct vfsmount *mnt)
224 {
225         return;
226 }
227
228 static void dummy_sb_umount_busy (struct vfsmount *mnt)
229 {
230         return;
231 }
232
233 static void dummy_sb_post_remount (struct vfsmount *mnt, unsigned long flags,
234                                    void *data)
235 {
236         return;
237 }
238
239
240 static void dummy_sb_post_addmount (struct vfsmount *mnt, struct path *path)
241 {
242         return;
243 }
244
245 static int dummy_sb_pivotroot (struct path *old_path, struct path *new_path)
246 {
247         return 0;
248 }
249
250 static void dummy_sb_post_pivotroot (struct path *old_path, struct path *new_path)
251 {
252         return;
253 }
254
255 static int dummy_sb_set_mnt_opts(struct super_block *sb,
256                                  struct security_mnt_opts *opts)
257 {
258         if (unlikely(opts->num_mnt_opts))
259                 return -EOPNOTSUPP;
260         return 0;
261 }
262
263 static void dummy_sb_clone_mnt_opts(const struct super_block *oldsb,
264                                     struct super_block *newsb)
265 {
266         return;
267 }
268
269 static int dummy_sb_parse_opts_str(char *options, struct security_mnt_opts *opts)
270 {
271         return 0;
272 }
273
274 static int dummy_inode_alloc_security (struct inode *inode)
275 {
276         return 0;
277 }
278
279 static void dummy_inode_free_security (struct inode *inode)
280 {
281         return;
282 }
283
284 static int dummy_inode_init_security (struct inode *inode, struct inode *dir,
285                                       char **name, void **value, size_t *len)
286 {
287         return -EOPNOTSUPP;
288 }
289
290 static int dummy_inode_create (struct inode *inode, struct dentry *dentry,
291                                int mask)
292 {
293         return 0;
294 }
295
296 static int dummy_inode_link (struct dentry *old_dentry, struct inode *inode,
297                              struct dentry *new_dentry)
298 {
299         return 0;
300 }
301
302 static int dummy_inode_unlink (struct inode *inode, struct dentry *dentry)
303 {
304         return 0;
305 }
306
307 static int dummy_inode_symlink (struct inode *inode, struct dentry *dentry,
308                                 const char *name)
309 {
310         return 0;
311 }
312
313 static int dummy_inode_mkdir (struct inode *inode, struct dentry *dentry,
314                               int mask)
315 {
316         return 0;
317 }
318
319 static int dummy_inode_rmdir (struct inode *inode, struct dentry *dentry)
320 {
321         return 0;
322 }
323
324 static int dummy_inode_mknod (struct inode *inode, struct dentry *dentry,
325                               int mode, dev_t dev)
326 {
327         return 0;
328 }
329
330 static int dummy_inode_rename (struct inode *old_inode,
331                                struct dentry *old_dentry,
332                                struct inode *new_inode,
333                                struct dentry *new_dentry)
334 {
335         return 0;
336 }
337
338 static int dummy_inode_readlink (struct dentry *dentry)
339 {
340         return 0;
341 }
342
343 static int dummy_inode_follow_link (struct dentry *dentry,
344                                     struct nameidata *nameidata)
345 {
346         return 0;
347 }
348
349 static int dummy_inode_permission (struct inode *inode, int mask, struct nameidata *nd)
350 {
351         return 0;
352 }
353
354 static int dummy_inode_setattr (struct dentry *dentry, struct iattr *iattr)
355 {
356         return 0;
357 }
358
359 static int dummy_inode_getattr (struct vfsmount *mnt, struct dentry *dentry)
360 {
361         return 0;
362 }
363
364 static void dummy_inode_delete (struct inode *ino)
365 {
366         return;
367 }
368
369 static int dummy_inode_setxattr (struct dentry *dentry, const char *name,
370                                  const void *value, size_t size, int flags)
371 {
372         if (!strncmp(name, XATTR_SECURITY_PREFIX,
373                      sizeof(XATTR_SECURITY_PREFIX) - 1) &&
374             !capable(CAP_SYS_ADMIN))
375                 return -EPERM;
376         return 0;
377 }
378
379 static void dummy_inode_post_setxattr (struct dentry *dentry, const char *name,
380                                        const void *value, size_t size,
381                                        int flags)
382 {
383 }
384
385 static int dummy_inode_getxattr (struct dentry *dentry, const char *name)
386 {
387         return 0;
388 }
389
390 static int dummy_inode_listxattr (struct dentry *dentry)
391 {
392         return 0;
393 }
394
395 static int dummy_inode_removexattr (struct dentry *dentry, const char *name)
396 {
397         if (!strncmp(name, XATTR_SECURITY_PREFIX,
398                      sizeof(XATTR_SECURITY_PREFIX) - 1) &&
399             !capable(CAP_SYS_ADMIN))
400                 return -EPERM;
401         return 0;
402 }
403
404 static int dummy_inode_need_killpriv(struct dentry *dentry)
405 {
406         return 0;
407 }
408
409 static int dummy_inode_killpriv(struct dentry *dentry)
410 {
411         return 0;
412 }
413
414 static int dummy_inode_getsecurity(const struct inode *inode, const char *name, void **buffer, bool alloc)
415 {
416         return -EOPNOTSUPP;
417 }
418
419 static int dummy_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags)
420 {
421         return -EOPNOTSUPP;
422 }
423
424 static int dummy_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
425 {
426         return 0;
427 }
428
429 static void dummy_inode_getsecid(const struct inode *inode, u32 *secid)
430 {
431         *secid = 0;
432 }
433
434 static int dummy_file_permission (struct file *file, int mask)
435 {
436         return 0;
437 }
438
439 static int dummy_file_alloc_security (struct file *file)
440 {
441         return 0;
442 }
443
444 static void dummy_file_free_security (struct file *file)
445 {
446         return;
447 }
448
449 static int dummy_file_ioctl (struct file *file, unsigned int command,
450                              unsigned long arg)
451 {
452         return 0;
453 }
454
455 static int dummy_file_mmap (struct file *file, unsigned long reqprot,
456                             unsigned long prot,
457                             unsigned long flags,
458                             unsigned long addr,
459                             unsigned long addr_only)
460 {
461         if ((addr < mmap_min_addr) && !capable(CAP_SYS_RAWIO))
462                 return -EACCES;
463         return 0;
464 }
465
466 static int dummy_file_mprotect (struct vm_area_struct *vma,
467                                 unsigned long reqprot,
468                                 unsigned long prot)
469 {
470         return 0;
471 }
472
473 static int dummy_file_lock (struct file *file, unsigned int cmd)
474 {
475         return 0;
476 }
477
478 static int dummy_file_fcntl (struct file *file, unsigned int cmd,
479                              unsigned long arg)
480 {
481         return 0;
482 }
483
484 static int dummy_file_set_fowner (struct file *file)
485 {
486         return 0;
487 }
488
489 static int dummy_file_send_sigiotask (struct task_struct *tsk,
490                                       struct fown_struct *fown, int sig)
491 {
492         return 0;
493 }
494
495 static int dummy_file_receive (struct file *file)
496 {
497         return 0;
498 }
499
500 static int dummy_dentry_open (struct file *file)
501 {
502         return 0;
503 }
504
505 static int dummy_task_create (unsigned long clone_flags)
506 {
507         return 0;
508 }
509
510 static int dummy_task_alloc_security (struct task_struct *p)
511 {
512         return 0;
513 }
514
515 static void dummy_task_free_security (struct task_struct *p)
516 {
517         return;
518 }
519
520 static int dummy_task_setuid (uid_t id0, uid_t id1, uid_t id2, int flags)
521 {
522         return 0;
523 }
524
525 static int dummy_task_post_setuid (uid_t id0, uid_t id1, uid_t id2, int flags)
526 {
527         dummy_capget(current, &current->cap_effective, &current->cap_inheritable, &current->cap_permitted);
528         return 0;
529 }
530
531 static int dummy_task_setgid (gid_t id0, gid_t id1, gid_t id2, int flags)
532 {
533         return 0;
534 }
535
536 static int dummy_task_setpgid (struct task_struct *p, pid_t pgid)
537 {
538         return 0;
539 }
540
541 static int dummy_task_getpgid (struct task_struct *p)
542 {
543         return 0;
544 }
545
546 static int dummy_task_getsid (struct task_struct *p)
547 {
548         return 0;
549 }
550
551 static void dummy_task_getsecid (struct task_struct *p, u32 *secid)
552 {
553         *secid = 0;
554 }
555
556 static int dummy_task_setgroups (struct group_info *group_info)
557 {
558         return 0;
559 }
560
561 static int dummy_task_setnice (struct task_struct *p, int nice)
562 {
563         return 0;
564 }
565
566 static int dummy_task_setioprio (struct task_struct *p, int ioprio)
567 {
568         return 0;
569 }
570
571 static int dummy_task_getioprio (struct task_struct *p)
572 {
573         return 0;
574 }
575
576 static int dummy_task_setrlimit (unsigned int resource, struct rlimit *new_rlim)
577 {
578         return 0;
579 }
580
581 static int dummy_task_setscheduler (struct task_struct *p, int policy,
582                                     struct sched_param *lp)
583 {
584         return 0;
585 }
586
587 static int dummy_task_getscheduler (struct task_struct *p)
588 {
589         return 0;
590 }
591
592 static int dummy_task_movememory (struct task_struct *p)
593 {
594         return 0;
595 }
596
597 static int dummy_task_wait (struct task_struct *p)
598 {
599         return 0;
600 }
601
602 static int dummy_task_kill (struct task_struct *p, struct siginfo *info,
603                             int sig, u32 secid)
604 {
605         return 0;
606 }
607
608 static int dummy_task_prctl (int option, unsigned long arg2, unsigned long arg3,
609                              unsigned long arg4, unsigned long arg5, long *rc_p)
610 {
611         switch (option) {
612         case PR_CAPBSET_READ:
613                 *rc_p = (cap_valid(arg2) ? 1 : -EINVAL);
614                 break;
615         case PR_GET_KEEPCAPS:
616                 *rc_p = issecure(SECURE_KEEP_CAPS);
617                 break;
618         case PR_SET_KEEPCAPS:
619                 if (arg2 > 1)
620                         *rc_p = -EINVAL;
621                 else if (arg2)
622                         current->securebits |= issecure_mask(SECURE_KEEP_CAPS);
623                 else
624                         current->securebits &=
625                                 ~issecure_mask(SECURE_KEEP_CAPS);
626                 break;
627         default:
628                 return 0;
629         }
630
631         return 1;
632 }
633
634 static void dummy_task_reparent_to_init (struct task_struct *p)
635 {
636         p->euid = p->fsuid = 0;
637         return;
638 }
639
640 static void dummy_task_to_inode(struct task_struct *p, struct inode *inode)
641 { }
642
643 static int dummy_ipc_permission (struct kern_ipc_perm *ipcp, short flag)
644 {
645         return 0;
646 }
647
648 static void dummy_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid)
649 {
650         *secid = 0;
651 }
652
653 static int dummy_msg_msg_alloc_security (struct msg_msg *msg)
654 {
655         return 0;
656 }
657
658 static void dummy_msg_msg_free_security (struct msg_msg *msg)
659 {
660         return;
661 }
662
663 static int dummy_msg_queue_alloc_security (struct msg_queue *msq)
664 {
665         return 0;
666 }
667
668 static void dummy_msg_queue_free_security (struct msg_queue *msq)
669 {
670         return;
671 }
672
673 static int dummy_msg_queue_associate (struct msg_queue *msq, 
674                                       int msqflg)
675 {
676         return 0;
677 }
678
679 static int dummy_msg_queue_msgctl (struct msg_queue *msq, int cmd)
680 {
681         return 0;
682 }
683
684 static int dummy_msg_queue_msgsnd (struct msg_queue *msq, struct msg_msg *msg,
685                                    int msgflg)
686 {
687         return 0;
688 }
689
690 static int dummy_msg_queue_msgrcv (struct msg_queue *msq, struct msg_msg *msg,
691                                    struct task_struct *target, long type,
692                                    int mode)
693 {
694         return 0;
695 }
696
697 static int dummy_shm_alloc_security (struct shmid_kernel *shp)
698 {
699         return 0;
700 }
701
702 static void dummy_shm_free_security (struct shmid_kernel *shp)
703 {
704         return;
705 }
706
707 static int dummy_shm_associate (struct shmid_kernel *shp, int shmflg)
708 {
709         return 0;
710 }
711
712 static int dummy_shm_shmctl (struct shmid_kernel *shp, int cmd)
713 {
714         return 0;
715 }
716
717 static int dummy_shm_shmat (struct shmid_kernel *shp, char __user *shmaddr,
718                             int shmflg)
719 {
720         return 0;
721 }
722
723 static int dummy_sem_alloc_security (struct sem_array *sma)
724 {
725         return 0;
726 }
727
728 static void dummy_sem_free_security (struct sem_array *sma)
729 {
730         return;
731 }
732
733 static int dummy_sem_associate (struct sem_array *sma, int semflg)
734 {
735         return 0;
736 }
737
738 static int dummy_sem_semctl (struct sem_array *sma, int cmd)
739 {
740         return 0;
741 }
742
743 static int dummy_sem_semop (struct sem_array *sma, 
744                             struct sembuf *sops, unsigned nsops, int alter)
745 {
746         return 0;
747 }
748
749 static int dummy_netlink_send (struct sock *sk, struct sk_buff *skb)
750 {
751         NETLINK_CB(skb).eff_cap = current->cap_effective;
752         return 0;
753 }
754
755 static int dummy_netlink_recv (struct sk_buff *skb, int cap)
756 {
757         if (!cap_raised (NETLINK_CB (skb).eff_cap, cap))
758                 return -EPERM;
759         return 0;
760 }
761
762 #ifdef CONFIG_SECURITY_NETWORK
763 static int dummy_unix_stream_connect (struct socket *sock,
764                                       struct socket *other,
765                                       struct sock *newsk)
766 {
767         return 0;
768 }
769
770 static int dummy_unix_may_send (struct socket *sock,
771                                 struct socket *other)
772 {
773         return 0;
774 }
775
776 static int dummy_socket_create (int family, int type,
777                                 int protocol, int kern)
778 {
779         return 0;
780 }
781
782 static int dummy_socket_post_create (struct socket *sock, int family, int type,
783                                      int protocol, int kern)
784 {
785         return 0;
786 }
787
788 static int dummy_socket_bind (struct socket *sock, struct sockaddr *address,
789                               int addrlen)
790 {
791         return 0;
792 }
793
794 static int dummy_socket_connect (struct socket *sock, struct sockaddr *address,
795                                  int addrlen)
796 {
797         return 0;
798 }
799
800 static int dummy_socket_listen (struct socket *sock, int backlog)
801 {
802         return 0;
803 }
804
805 static int dummy_socket_accept (struct socket *sock, struct socket *newsock)
806 {
807         return 0;
808 }
809
810 static void dummy_socket_post_accept (struct socket *sock, 
811                                       struct socket *newsock)
812 {
813         return;
814 }
815
816 static int dummy_socket_sendmsg (struct socket *sock, struct msghdr *msg,
817                                  int size)
818 {
819         return 0;
820 }
821
822 static int dummy_socket_recvmsg (struct socket *sock, struct msghdr *msg,
823                                  int size, int flags)
824 {
825         return 0;
826 }
827
828 static int dummy_socket_getsockname (struct socket *sock)
829 {
830         return 0;
831 }
832
833 static int dummy_socket_getpeername (struct socket *sock)
834 {
835         return 0;
836 }
837
838 static int dummy_socket_setsockopt (struct socket *sock, int level, int optname)
839 {
840         return 0;
841 }
842
843 static int dummy_socket_getsockopt (struct socket *sock, int level, int optname)
844 {
845         return 0;
846 }
847
848 static int dummy_socket_shutdown (struct socket *sock, int how)
849 {
850         return 0;
851 }
852
853 static int dummy_socket_sock_rcv_skb (struct sock *sk, struct sk_buff *skb)
854 {
855         return 0;
856 }
857
858 static int dummy_socket_getpeersec_stream(struct socket *sock, char __user *optval,
859                                           int __user *optlen, unsigned len)
860 {
861         return -ENOPROTOOPT;
862 }
863
864 static int dummy_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid)
865 {
866         return -ENOPROTOOPT;
867 }
868
869 static inline int dummy_sk_alloc_security (struct sock *sk, int family, gfp_t priority)
870 {
871         return 0;
872 }
873
874 static inline void dummy_sk_free_security (struct sock *sk)
875 {
876 }
877
878 static inline void dummy_sk_clone_security (const struct sock *sk, struct sock *newsk)
879 {
880 }
881
882 static inline void dummy_sk_getsecid(struct sock *sk, u32 *secid)
883 {
884 }
885
886 static inline void dummy_sock_graft(struct sock* sk, struct socket *parent)
887 {
888 }
889
890 static inline int dummy_inet_conn_request(struct sock *sk,
891                         struct sk_buff *skb, struct request_sock *req)
892 {
893         return 0;
894 }
895
896 static inline void dummy_inet_csk_clone(struct sock *newsk,
897                         const struct request_sock *req)
898 {
899 }
900
901 static inline void dummy_inet_conn_established(struct sock *sk,
902                         struct sk_buff *skb)
903 {
904 }
905
906 static inline void dummy_req_classify_flow(const struct request_sock *req,
907                         struct flowi *fl)
908 {
909 }
910 #endif  /* CONFIG_SECURITY_NETWORK */
911
912 #ifdef CONFIG_SECURITY_NETWORK_XFRM
913 static int dummy_xfrm_policy_alloc_security(struct xfrm_sec_ctx **ctxp,
914                                             struct xfrm_user_sec_ctx *sec_ctx)
915 {
916         return 0;
917 }
918
919 static inline int dummy_xfrm_policy_clone_security(struct xfrm_sec_ctx *old_ctx,
920                                            struct xfrm_sec_ctx **new_ctxp)
921 {
922         return 0;
923 }
924
925 static void dummy_xfrm_policy_free_security(struct xfrm_sec_ctx *ctx)
926 {
927 }
928
929 static int dummy_xfrm_policy_delete_security(struct xfrm_sec_ctx *ctx)
930 {
931         return 0;
932 }
933
934 static int dummy_xfrm_state_alloc_security(struct xfrm_state *x,
935         struct xfrm_user_sec_ctx *sec_ctx, u32 secid)
936 {
937         return 0;
938 }
939
940 static void dummy_xfrm_state_free_security(struct xfrm_state *x)
941 {
942 }
943
944 static int dummy_xfrm_state_delete_security(struct xfrm_state *x)
945 {
946         return 0;
947 }
948
949 static int dummy_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx,
950                                     u32 sk_sid, u8 dir)
951 {
952         return 0;
953 }
954
955 static int dummy_xfrm_state_pol_flow_match(struct xfrm_state *x,
956                                 struct xfrm_policy *xp, struct flowi *fl)
957 {
958         return 1;
959 }
960
961 static int dummy_xfrm_decode_session(struct sk_buff *skb, u32 *fl, int ckall)
962 {
963         return 0;
964 }
965
966 #endif /* CONFIG_SECURITY_NETWORK_XFRM */
967 static int dummy_register_security (const char *name, struct security_operations *ops)
968 {
969         return -EINVAL;
970 }
971
972 static void dummy_d_instantiate (struct dentry *dentry, struct inode *inode)
973 {
974         return;
975 }
976
977 static int dummy_getprocattr(struct task_struct *p, char *name, char **value)
978 {
979         return -EINVAL;
980 }
981
982 static int dummy_setprocattr(struct task_struct *p, char *name, void *value, size_t size)
983 {
984         return -EINVAL;
985 }
986
987 static int dummy_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
988 {
989         return -EOPNOTSUPP;
990 }
991
992 static int dummy_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
993 {
994         return -EOPNOTSUPP;
995 }
996
997 static void dummy_release_secctx(char *secdata, u32 seclen)
998 {
999 }
1000
1001 #ifdef CONFIG_KEYS
1002 static inline int dummy_key_alloc(struct key *key, struct task_struct *ctx,
1003                                   unsigned long flags)
1004 {
1005         return 0;
1006 }
1007
1008 static inline void dummy_key_free(struct key *key)
1009 {
1010 }
1011
1012 static inline int dummy_key_permission(key_ref_t key_ref,
1013                                        struct task_struct *context,
1014                                        key_perm_t perm)
1015 {
1016         return 0;
1017 }
1018
1019 static int dummy_key_getsecurity(struct key *key, char **_buffer)
1020 {
1021         *_buffer = NULL;
1022         return 0;
1023 }
1024
1025 #endif /* CONFIG_KEYS */
1026
1027 #ifdef CONFIG_AUDIT
1028 static inline int dummy_audit_rule_init(u32 field, u32 op, char *rulestr,
1029                                         void **lsmrule)
1030 {
1031         return 0;
1032 }
1033
1034 static inline int dummy_audit_rule_known(struct audit_krule *krule)
1035 {
1036         return 0;
1037 }
1038
1039 static inline int dummy_audit_rule_match(u32 secid, u32 field, u32 op,
1040                                          void *lsmrule,
1041                                          struct audit_context *actx)
1042 {
1043         return 0;
1044 }
1045
1046 static inline void dummy_audit_rule_free(void *lsmrule)
1047 { }
1048
1049 #endif /* CONFIG_AUDIT */
1050
1051 struct security_operations dummy_security_ops = {
1052         .name = "dummy",
1053 };
1054
1055 #define set_to_dummy_if_null(ops, function)                             \
1056         do {                                                            \
1057                 if (!ops->function) {                                   \
1058                         ops->function = dummy_##function;               \
1059                         pr_debug("Had to override the " #function       \
1060                                  " security operation with the dummy one.\n");\
1061                         }                                               \
1062         } while (0)
1063
1064 void security_fixup_ops (struct security_operations *ops)
1065 {
1066         set_to_dummy_if_null(ops, ptrace);
1067         set_to_dummy_if_null(ops, capget);
1068         set_to_dummy_if_null(ops, capset_check);
1069         set_to_dummy_if_null(ops, capset_set);
1070         set_to_dummy_if_null(ops, acct);
1071         set_to_dummy_if_null(ops, capable);
1072         set_to_dummy_if_null(ops, quotactl);
1073         set_to_dummy_if_null(ops, quota_on);
1074         set_to_dummy_if_null(ops, sysctl);
1075         set_to_dummy_if_null(ops, syslog);
1076         set_to_dummy_if_null(ops, settime);
1077         set_to_dummy_if_null(ops, vm_enough_memory);
1078         set_to_dummy_if_null(ops, bprm_alloc_security);
1079         set_to_dummy_if_null(ops, bprm_free_security);
1080         set_to_dummy_if_null(ops, bprm_apply_creds);
1081         set_to_dummy_if_null(ops, bprm_post_apply_creds);
1082         set_to_dummy_if_null(ops, bprm_set_security);
1083         set_to_dummy_if_null(ops, bprm_check_security);
1084         set_to_dummy_if_null(ops, bprm_secureexec);
1085         set_to_dummy_if_null(ops, sb_alloc_security);
1086         set_to_dummy_if_null(ops, sb_free_security);
1087         set_to_dummy_if_null(ops, sb_copy_data);
1088         set_to_dummy_if_null(ops, sb_kern_mount);
1089         set_to_dummy_if_null(ops, sb_show_options);
1090         set_to_dummy_if_null(ops, sb_statfs);
1091         set_to_dummy_if_null(ops, sb_mount);
1092         set_to_dummy_if_null(ops, sb_check_sb);
1093         set_to_dummy_if_null(ops, sb_umount);
1094         set_to_dummy_if_null(ops, sb_umount_close);
1095         set_to_dummy_if_null(ops, sb_umount_busy);
1096         set_to_dummy_if_null(ops, sb_post_remount);
1097         set_to_dummy_if_null(ops, sb_post_addmount);
1098         set_to_dummy_if_null(ops, sb_pivotroot);
1099         set_to_dummy_if_null(ops, sb_post_pivotroot);
1100         set_to_dummy_if_null(ops, sb_set_mnt_opts);
1101         set_to_dummy_if_null(ops, sb_clone_mnt_opts);
1102         set_to_dummy_if_null(ops, sb_parse_opts_str);
1103         set_to_dummy_if_null(ops, inode_alloc_security);
1104         set_to_dummy_if_null(ops, inode_free_security);
1105         set_to_dummy_if_null(ops, inode_init_security);
1106         set_to_dummy_if_null(ops, inode_create);
1107         set_to_dummy_if_null(ops, inode_link);
1108         set_to_dummy_if_null(ops, inode_unlink);
1109         set_to_dummy_if_null(ops, inode_symlink);
1110         set_to_dummy_if_null(ops, inode_mkdir);
1111         set_to_dummy_if_null(ops, inode_rmdir);
1112         set_to_dummy_if_null(ops, inode_mknod);
1113         set_to_dummy_if_null(ops, inode_rename);
1114         set_to_dummy_if_null(ops, inode_readlink);
1115         set_to_dummy_if_null(ops, inode_follow_link);
1116         set_to_dummy_if_null(ops, inode_permission);
1117         set_to_dummy_if_null(ops, inode_setattr);
1118         set_to_dummy_if_null(ops, inode_getattr);
1119         set_to_dummy_if_null(ops, inode_delete);
1120         set_to_dummy_if_null(ops, inode_setxattr);
1121         set_to_dummy_if_null(ops, inode_post_setxattr);
1122         set_to_dummy_if_null(ops, inode_getxattr);
1123         set_to_dummy_if_null(ops, inode_listxattr);
1124         set_to_dummy_if_null(ops, inode_removexattr);
1125         set_to_dummy_if_null(ops, inode_need_killpriv);
1126         set_to_dummy_if_null(ops, inode_killpriv);
1127         set_to_dummy_if_null(ops, inode_getsecurity);
1128         set_to_dummy_if_null(ops, inode_setsecurity);
1129         set_to_dummy_if_null(ops, inode_listsecurity);
1130         set_to_dummy_if_null(ops, inode_getsecid);
1131         set_to_dummy_if_null(ops, file_permission);
1132         set_to_dummy_if_null(ops, file_alloc_security);
1133         set_to_dummy_if_null(ops, file_free_security);
1134         set_to_dummy_if_null(ops, file_ioctl);
1135         set_to_dummy_if_null(ops, file_mmap);
1136         set_to_dummy_if_null(ops, file_mprotect);
1137         set_to_dummy_if_null(ops, file_lock);
1138         set_to_dummy_if_null(ops, file_fcntl);
1139         set_to_dummy_if_null(ops, file_set_fowner);
1140         set_to_dummy_if_null(ops, file_send_sigiotask);
1141         set_to_dummy_if_null(ops, file_receive);
1142         set_to_dummy_if_null(ops, dentry_open);
1143         set_to_dummy_if_null(ops, task_create);
1144         set_to_dummy_if_null(ops, task_alloc_security);
1145         set_to_dummy_if_null(ops, task_free_security);
1146         set_to_dummy_if_null(ops, task_setuid);
1147         set_to_dummy_if_null(ops, task_post_setuid);
1148         set_to_dummy_if_null(ops, task_setgid);
1149         set_to_dummy_if_null(ops, task_setpgid);
1150         set_to_dummy_if_null(ops, task_getpgid);
1151         set_to_dummy_if_null(ops, task_getsid);
1152         set_to_dummy_if_null(ops, task_getsecid);
1153         set_to_dummy_if_null(ops, task_setgroups);
1154         set_to_dummy_if_null(ops, task_setnice);
1155         set_to_dummy_if_null(ops, task_setioprio);
1156         set_to_dummy_if_null(ops, task_getioprio);
1157         set_to_dummy_if_null(ops, task_setrlimit);
1158         set_to_dummy_if_null(ops, task_setscheduler);
1159         set_to_dummy_if_null(ops, task_getscheduler);
1160         set_to_dummy_if_null(ops, task_movememory);
1161         set_to_dummy_if_null(ops, task_wait);
1162         set_to_dummy_if_null(ops, task_kill);
1163         set_to_dummy_if_null(ops, task_prctl);
1164         set_to_dummy_if_null(ops, task_reparent_to_init);
1165         set_to_dummy_if_null(ops, task_to_inode);
1166         set_to_dummy_if_null(ops, ipc_permission);
1167         set_to_dummy_if_null(ops, ipc_getsecid);
1168         set_to_dummy_if_null(ops, msg_msg_alloc_security);
1169         set_to_dummy_if_null(ops, msg_msg_free_security);
1170         set_to_dummy_if_null(ops, msg_queue_alloc_security);
1171         set_to_dummy_if_null(ops, msg_queue_free_security);
1172         set_to_dummy_if_null(ops, msg_queue_associate);
1173         set_to_dummy_if_null(ops, msg_queue_msgctl);
1174         set_to_dummy_if_null(ops, msg_queue_msgsnd);
1175         set_to_dummy_if_null(ops, msg_queue_msgrcv);
1176         set_to_dummy_if_null(ops, shm_alloc_security);
1177         set_to_dummy_if_null(ops, shm_free_security);
1178         set_to_dummy_if_null(ops, shm_associate);
1179         set_to_dummy_if_null(ops, shm_shmctl);
1180         set_to_dummy_if_null(ops, shm_shmat);
1181         set_to_dummy_if_null(ops, sem_alloc_security);
1182         set_to_dummy_if_null(ops, sem_free_security);
1183         set_to_dummy_if_null(ops, sem_associate);
1184         set_to_dummy_if_null(ops, sem_semctl);
1185         set_to_dummy_if_null(ops, sem_semop);
1186         set_to_dummy_if_null(ops, netlink_send);
1187         set_to_dummy_if_null(ops, netlink_recv);
1188         set_to_dummy_if_null(ops, register_security);
1189         set_to_dummy_if_null(ops, d_instantiate);
1190         set_to_dummy_if_null(ops, getprocattr);
1191         set_to_dummy_if_null(ops, setprocattr);
1192         set_to_dummy_if_null(ops, secid_to_secctx);
1193         set_to_dummy_if_null(ops, secctx_to_secid);
1194         set_to_dummy_if_null(ops, release_secctx);
1195 #ifdef CONFIG_SECURITY_NETWORK
1196         set_to_dummy_if_null(ops, unix_stream_connect);
1197         set_to_dummy_if_null(ops, unix_may_send);
1198         set_to_dummy_if_null(ops, socket_create);
1199         set_to_dummy_if_null(ops, socket_post_create);
1200         set_to_dummy_if_null(ops, socket_bind);
1201         set_to_dummy_if_null(ops, socket_connect);
1202         set_to_dummy_if_null(ops, socket_listen);
1203         set_to_dummy_if_null(ops, socket_accept);
1204         set_to_dummy_if_null(ops, socket_post_accept);
1205         set_to_dummy_if_null(ops, socket_sendmsg);
1206         set_to_dummy_if_null(ops, socket_recvmsg);
1207         set_to_dummy_if_null(ops, socket_getsockname);
1208         set_to_dummy_if_null(ops, socket_getpeername);
1209         set_to_dummy_if_null(ops, socket_setsockopt);
1210         set_to_dummy_if_null(ops, socket_getsockopt);
1211         set_to_dummy_if_null(ops, socket_shutdown);
1212         set_to_dummy_if_null(ops, socket_sock_rcv_skb);
1213         set_to_dummy_if_null(ops, socket_getpeersec_stream);
1214         set_to_dummy_if_null(ops, socket_getpeersec_dgram);
1215         set_to_dummy_if_null(ops, sk_alloc_security);
1216         set_to_dummy_if_null(ops, sk_free_security);
1217         set_to_dummy_if_null(ops, sk_clone_security);
1218         set_to_dummy_if_null(ops, sk_getsecid);
1219         set_to_dummy_if_null(ops, sock_graft);
1220         set_to_dummy_if_null(ops, inet_conn_request);
1221         set_to_dummy_if_null(ops, inet_csk_clone);
1222         set_to_dummy_if_null(ops, inet_conn_established);
1223         set_to_dummy_if_null(ops, req_classify_flow);
1224  #endif /* CONFIG_SECURITY_NETWORK */
1225 #ifdef  CONFIG_SECURITY_NETWORK_XFRM
1226         set_to_dummy_if_null(ops, xfrm_policy_alloc_security);
1227         set_to_dummy_if_null(ops, xfrm_policy_clone_security);
1228         set_to_dummy_if_null(ops, xfrm_policy_free_security);
1229         set_to_dummy_if_null(ops, xfrm_policy_delete_security);
1230         set_to_dummy_if_null(ops, xfrm_state_alloc_security);
1231         set_to_dummy_if_null(ops, xfrm_state_free_security);
1232         set_to_dummy_if_null(ops, xfrm_state_delete_security);
1233         set_to_dummy_if_null(ops, xfrm_policy_lookup);
1234         set_to_dummy_if_null(ops, xfrm_state_pol_flow_match);
1235         set_to_dummy_if_null(ops, xfrm_decode_session);
1236 #endif  /* CONFIG_SECURITY_NETWORK_XFRM */
1237 #ifdef CONFIG_KEYS
1238         set_to_dummy_if_null(ops, key_alloc);
1239         set_to_dummy_if_null(ops, key_free);
1240         set_to_dummy_if_null(ops, key_permission);
1241         set_to_dummy_if_null(ops, key_getsecurity);
1242 #endif  /* CONFIG_KEYS */
1243 #ifdef CONFIG_AUDIT
1244         set_to_dummy_if_null(ops, audit_rule_init);
1245         set_to_dummy_if_null(ops, audit_rule_known);
1246         set_to_dummy_if_null(ops, audit_rule_match);
1247         set_to_dummy_if_null(ops, audit_rule_free);
1248 #endif
1249 }
1250