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