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