SELinux: remove inherit field from inode_security_struct
[linux-3.10.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 {
35         return 0;
36 }
37
38 static int dummy_capget (struct task_struct *target, kernel_cap_t * effective,
39                          kernel_cap_t * inheritable, kernel_cap_t * permitted)
40 {
41         if (target->euid == 0) {
42                 cap_set_full(*permitted);
43                 cap_set_init_eff(*effective);
44         } else {
45                 cap_clear(*permitted);
46                 cap_clear(*effective);
47         }
48
49         cap_clear(*inheritable);
50
51         if (target->fsuid != 0) {
52                 *permitted = cap_drop_fs_set(*permitted);
53                 *effective = cap_drop_fs_set(*effective);
54         }
55         return 0;
56 }
57
58 static int dummy_capset_check (struct task_struct *target,
59                                kernel_cap_t * effective,
60                                kernel_cap_t * inheritable,
61                                kernel_cap_t * permitted)
62 {
63         return -EPERM;
64 }
65
66 static void dummy_capset_set (struct task_struct *target,
67                               kernel_cap_t * effective,
68                               kernel_cap_t * inheritable,
69                               kernel_cap_t * permitted)
70 {
71         return;
72 }
73
74 static int dummy_acct (struct file *file)
75 {
76         return 0;
77 }
78
79 static int dummy_capable (struct task_struct *tsk, int cap)
80 {
81         if (cap_raised (tsk->cap_effective, cap))
82                 return 0;
83         return -EPERM;
84 }
85
86 static int dummy_sysctl (ctl_table * table, int op)
87 {
88         return 0;
89 }
90
91 static int dummy_quotactl (int cmds, int type, int id, struct super_block *sb)
92 {
93         return 0;
94 }
95
96 static int dummy_quota_on (struct dentry *dentry)
97 {
98         return 0;
99 }
100
101 static int dummy_syslog (int type)
102 {
103         if ((type != 3 && type != 10) && current->euid)
104                 return -EPERM;
105         return 0;
106 }
107
108 static int dummy_settime(struct timespec *ts, struct timezone *tz)
109 {
110         if (!capable(CAP_SYS_TIME))
111                 return -EPERM;
112         return 0;
113 }
114
115 static int dummy_vm_enough_memory(struct mm_struct *mm, long pages)
116 {
117         int cap_sys_admin = 0;
118
119         if (dummy_capable(current, CAP_SYS_ADMIN) == 0)
120                 cap_sys_admin = 1;
121         return __vm_enough_memory(mm, pages, cap_sys_admin);
122 }
123
124 static int dummy_bprm_alloc_security (struct linux_binprm *bprm)
125 {
126         return 0;
127 }
128
129 static void dummy_bprm_free_security (struct linux_binprm *bprm)
130 {
131         return;
132 }
133
134 static void dummy_bprm_apply_creds (struct linux_binprm *bprm, int unsafe)
135 {
136         if (bprm->e_uid != current->uid || bprm->e_gid != current->gid) {
137                 set_dumpable(current->mm, suid_dumpable);
138
139                 if ((unsafe & ~LSM_UNSAFE_PTRACE_CAP) && !capable(CAP_SETUID)) {
140                         bprm->e_uid = current->uid;
141                         bprm->e_gid = current->gid;
142                 }
143         }
144
145         current->suid = current->euid = current->fsuid = bprm->e_uid;
146         current->sgid = current->egid = current->fsgid = bprm->e_gid;
147
148         dummy_capget(current, &current->cap_effective, &current->cap_inheritable, &current->cap_permitted);
149 }
150
151 static void dummy_bprm_post_apply_creds (struct linux_binprm *bprm)
152 {
153         return;
154 }
155
156 static int dummy_bprm_set_security (struct linux_binprm *bprm)
157 {
158         return 0;
159 }
160
161 static int dummy_bprm_check_security (struct linux_binprm *bprm)
162 {
163         return 0;
164 }
165
166 static int dummy_bprm_secureexec (struct linux_binprm *bprm)
167 {
168         /* The new userland will simply use the value provided
169            in the AT_SECURE field to decide whether secure mode
170            is required.  Hence, this logic is required to preserve
171            the legacy decision algorithm used by the old userland. */
172         return (current->euid != current->uid ||
173                 current->egid != current->gid);
174 }
175
176 static int dummy_sb_alloc_security (struct super_block *sb)
177 {
178         return 0;
179 }
180
181 static void dummy_sb_free_security (struct super_block *sb)
182 {
183         return;
184 }
185
186 static int dummy_sb_copy_data (char *orig, char *copy)
187 {
188         return 0;
189 }
190
191 static int dummy_sb_kern_mount (struct super_block *sb, void *data)
192 {
193         return 0;
194 }
195
196 static int dummy_sb_statfs (struct dentry *dentry)
197 {
198         return 0;
199 }
200
201 static int dummy_sb_mount (char *dev_name, struct path *path, char *type,
202                            unsigned long flags, void *data)
203 {
204         return 0;
205 }
206
207 static int dummy_sb_check_sb (struct vfsmount *mnt, struct path *path)
208 {
209         return 0;
210 }
211
212 static int dummy_sb_umount (struct vfsmount *mnt, int flags)
213 {
214         return 0;
215 }
216
217 static void dummy_sb_umount_close (struct vfsmount *mnt)
218 {
219         return;
220 }
221
222 static void dummy_sb_umount_busy (struct vfsmount *mnt)
223 {
224         return;
225 }
226
227 static void dummy_sb_post_remount (struct vfsmount *mnt, unsigned long flags,
228                                    void *data)
229 {
230         return;
231 }
232
233
234 static void dummy_sb_post_addmount (struct vfsmount *mnt, struct path *path)
235 {
236         return;
237 }
238
239 static int dummy_sb_pivotroot (struct path *old_path, struct path *new_path)
240 {
241         return 0;
242 }
243
244 static void dummy_sb_post_pivotroot (struct path *old_path, struct path *new_path)
245 {
246         return;
247 }
248
249 static int dummy_sb_get_mnt_opts(const struct super_block *sb,
250                                  struct security_mnt_opts *opts)
251 {
252         security_init_mnt_opts(opts);
253         return 0;
254 }
255
256 static int dummy_sb_set_mnt_opts(struct super_block *sb,
257                                  struct security_mnt_opts *opts)
258 {
259         if (unlikely(opts->num_mnt_opts))
260                 return -EOPNOTSUPP;
261         return 0;
262 }
263
264 static void dummy_sb_clone_mnt_opts(const struct super_block *oldsb,
265                                     struct super_block *newsb)
266 {
267         return;
268 }
269
270 static int dummy_sb_parse_opts_str(char *options, struct security_mnt_opts *opts)
271 {
272         return 0;
273 }
274
275 static int dummy_inode_alloc_security (struct inode *inode)
276 {
277         return 0;
278 }
279
280 static void dummy_inode_free_security (struct inode *inode)
281 {
282         return;
283 }
284
285 static int dummy_inode_init_security (struct inode *inode, struct inode *dir,
286                                       char **name, void **value, size_t *len)
287 {
288         return -EOPNOTSUPP;
289 }
290
291 static int dummy_inode_create (struct inode *inode, struct dentry *dentry,
292                                int mask)
293 {
294         return 0;
295 }
296
297 static int dummy_inode_link (struct dentry *old_dentry, struct inode *inode,
298                              struct dentry *new_dentry)
299 {
300         return 0;
301 }
302
303 static int dummy_inode_unlink (struct inode *inode, struct dentry *dentry)
304 {
305         return 0;
306 }
307
308 static int dummy_inode_symlink (struct inode *inode, struct dentry *dentry,
309                                 const char *name)
310 {
311         return 0;
312 }
313
314 static int dummy_inode_mkdir (struct inode *inode, struct dentry *dentry,
315                               int mask)
316 {
317         return 0;
318 }
319
320 static int dummy_inode_rmdir (struct inode *inode, struct dentry *dentry)
321 {
322         return 0;
323 }
324
325 static int dummy_inode_mknod (struct inode *inode, struct dentry *dentry,
326                               int mode, dev_t dev)
327 {
328         return 0;
329 }
330
331 static int dummy_inode_rename (struct inode *old_inode,
332                                struct dentry *old_dentry,
333                                struct inode *new_inode,
334                                struct dentry *new_dentry)
335 {
336         return 0;
337 }
338
339 static int dummy_inode_readlink (struct dentry *dentry)
340 {
341         return 0;
342 }
343
344 static int dummy_inode_follow_link (struct dentry *dentry,
345                                     struct nameidata *nameidata)
346 {
347         return 0;
348 }
349
350 static int dummy_inode_permission (struct inode *inode, int mask, struct nameidata *nd)
351 {
352         return 0;
353 }
354
355 static int dummy_inode_setattr (struct dentry *dentry, struct iattr *iattr)
356 {
357         return 0;
358 }
359
360 static int dummy_inode_getattr (struct vfsmount *mnt, struct dentry *dentry)
361 {
362         return 0;
363 }
364
365 static void dummy_inode_delete (struct inode *ino)
366 {
367         return;
368 }
369
370 static int dummy_inode_setxattr (struct dentry *dentry, const char *name,
371                                  const void *value, size_t size, int flags)
372 {
373         if (!strncmp(name, XATTR_SECURITY_PREFIX,
374                      sizeof(XATTR_SECURITY_PREFIX) - 1) &&
375             !capable(CAP_SYS_ADMIN))
376                 return -EPERM;
377         return 0;
378 }
379
380 static void dummy_inode_post_setxattr (struct dentry *dentry, const char *name,
381                                        const void *value, size_t size,
382                                        int flags)
383 {
384 }
385
386 static int dummy_inode_getxattr (struct dentry *dentry, const char *name)
387 {
388         return 0;
389 }
390
391 static int dummy_inode_listxattr (struct dentry *dentry)
392 {
393         return 0;
394 }
395
396 static int dummy_inode_removexattr (struct dentry *dentry, const char *name)
397 {
398         if (!strncmp(name, XATTR_SECURITY_PREFIX,
399                      sizeof(XATTR_SECURITY_PREFIX) - 1) &&
400             !capable(CAP_SYS_ADMIN))
401                 return -EPERM;
402         return 0;
403 }
404
405 static int dummy_inode_need_killpriv(struct dentry *dentry)
406 {
407         return 0;
408 }
409
410 static int dummy_inode_killpriv(struct dentry *dentry)
411 {
412         return 0;
413 }
414
415 static int dummy_inode_getsecurity(const struct inode *inode, const char *name, void **buffer, bool alloc)
416 {
417         return -EOPNOTSUPP;
418 }
419
420 static int dummy_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags)
421 {
422         return -EOPNOTSUPP;
423 }
424
425 static int dummy_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
426 {
427         return 0;
428 }
429
430 static void dummy_inode_getsecid(const struct inode *inode, u32 *secid)
431 {
432         *secid = 0;
433 }
434
435 static int dummy_file_permission (struct file *file, int mask)
436 {
437         return 0;
438 }
439
440 static int dummy_file_alloc_security (struct file *file)
441 {
442         return 0;
443 }
444
445 static void dummy_file_free_security (struct file *file)
446 {
447         return;
448 }
449
450 static int dummy_file_ioctl (struct file *file, unsigned int command,
451                              unsigned long arg)
452 {
453         return 0;
454 }
455
456 static int dummy_file_mmap (struct file *file, unsigned long reqprot,
457                             unsigned long prot,
458                             unsigned long flags,
459                             unsigned long addr,
460                             unsigned long addr_only)
461 {
462         if ((addr < mmap_min_addr) && !capable(CAP_SYS_RAWIO))
463                 return -EACCES;
464         return 0;
465 }
466
467 static int dummy_file_mprotect (struct vm_area_struct *vma,
468                                 unsigned long reqprot,
469                                 unsigned long prot)
470 {
471         return 0;
472 }
473
474 static int dummy_file_lock (struct file *file, unsigned int cmd)
475 {
476         return 0;
477 }
478
479 static int dummy_file_fcntl (struct file *file, unsigned int cmd,
480                              unsigned long arg)
481 {
482         return 0;
483 }
484
485 static int dummy_file_set_fowner (struct file *file)
486 {
487         return 0;
488 }
489
490 static int dummy_file_send_sigiotask (struct task_struct *tsk,
491                                       struct fown_struct *fown, int sig)
492 {
493         return 0;
494 }
495
496 static int dummy_file_receive (struct file *file)
497 {
498         return 0;
499 }
500
501 static int dummy_dentry_open (struct file *file)
502 {
503         return 0;
504 }
505
506 static int dummy_task_create (unsigned long clone_flags)
507 {
508         return 0;
509 }
510
511 static int dummy_task_alloc_security (struct task_struct *p)
512 {
513         return 0;
514 }
515
516 static void dummy_task_free_security (struct task_struct *p)
517 {
518         return;
519 }
520
521 static int dummy_task_setuid (uid_t id0, uid_t id1, uid_t id2, int flags)
522 {
523         return 0;
524 }
525
526 static int dummy_task_post_setuid (uid_t id0, uid_t id1, uid_t id2, int flags)
527 {
528         dummy_capget(current, &current->cap_effective, &current->cap_inheritable, &current->cap_permitted);
529         return 0;
530 }
531
532 static int dummy_task_setgid (gid_t id0, gid_t id1, gid_t id2, int flags)
533 {
534         return 0;
535 }
536
537 static int dummy_task_setpgid (struct task_struct *p, pid_t pgid)
538 {
539         return 0;
540 }
541
542 static int dummy_task_getpgid (struct task_struct *p)
543 {
544         return 0;
545 }
546
547 static int dummy_task_getsid (struct task_struct *p)
548 {
549         return 0;
550 }
551
552 static void dummy_task_getsecid (struct task_struct *p, u32 *secid)
553 {
554         *secid = 0;
555 }
556
557 static int dummy_task_setgroups (struct group_info *group_info)
558 {
559         return 0;
560 }
561
562 static int dummy_task_setnice (struct task_struct *p, int nice)
563 {
564         return 0;
565 }
566
567 static int dummy_task_setioprio (struct task_struct *p, int ioprio)
568 {
569         return 0;
570 }
571
572 static int dummy_task_getioprio (struct task_struct *p)
573 {
574         return 0;
575 }
576
577 static int dummy_task_setrlimit (unsigned int resource, struct rlimit *new_rlim)
578 {
579         return 0;
580 }
581
582 static int dummy_task_setscheduler (struct task_struct *p, int policy,
583                                     struct sched_param *lp)
584 {
585         return 0;
586 }
587
588 static int dummy_task_getscheduler (struct task_struct *p)
589 {
590         return 0;
591 }
592
593 static int dummy_task_movememory (struct task_struct *p)
594 {
595         return 0;
596 }
597
598 static int dummy_task_wait (struct task_struct *p)
599 {
600         return 0;
601 }
602
603 static int dummy_task_kill (struct task_struct *p, struct siginfo *info,
604                             int sig, u32 secid)
605 {
606         return 0;
607 }
608
609 static int dummy_task_prctl (int option, unsigned long arg2, unsigned long arg3,
610                              unsigned long arg4, unsigned long arg5, long *rc_p)
611 {
612         switch (option) {
613         case PR_CAPBSET_READ:
614                 *rc_p = (cap_valid(arg2) ? 1 : -EINVAL);
615                 break;
616         case PR_GET_KEEPCAPS:
617                 *rc_p = issecure(SECURE_KEEP_CAPS);
618                 break;
619         case PR_SET_KEEPCAPS:
620                 if (arg2 > 1)
621                         *rc_p = -EINVAL;
622                 else if (arg2)
623                         current->securebits |= issecure_mask(SECURE_KEEP_CAPS);
624                 else
625                         current->securebits &=
626                                 ~issecure_mask(SECURE_KEEP_CAPS);
627                 break;
628         default:
629                 return 0;
630         }
631
632         return 1;
633 }
634
635 static void dummy_task_reparent_to_init (struct task_struct *p)
636 {
637         p->euid = p->fsuid = 0;
638         return;
639 }
640
641 static void dummy_task_to_inode(struct task_struct *p, struct inode *inode)
642 { }
643
644 static int dummy_ipc_permission (struct kern_ipc_perm *ipcp, short flag)
645 {
646         return 0;
647 }
648
649 static void dummy_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid)
650 {
651         *secid = 0;
652 }
653
654 static int dummy_msg_msg_alloc_security (struct msg_msg *msg)
655 {
656         return 0;
657 }
658
659 static void dummy_msg_msg_free_security (struct msg_msg *msg)
660 {
661         return;
662 }
663
664 static int dummy_msg_queue_alloc_security (struct msg_queue *msq)
665 {
666         return 0;
667 }
668
669 static void dummy_msg_queue_free_security (struct msg_queue *msq)
670 {
671         return;
672 }
673
674 static int dummy_msg_queue_associate (struct msg_queue *msq, 
675                                       int msqflg)
676 {
677         return 0;
678 }
679
680 static int dummy_msg_queue_msgctl (struct msg_queue *msq, int cmd)
681 {
682         return 0;
683 }
684
685 static int dummy_msg_queue_msgsnd (struct msg_queue *msq, struct msg_msg *msg,
686                                    int msgflg)
687 {
688         return 0;
689 }
690
691 static int dummy_msg_queue_msgrcv (struct msg_queue *msq, struct msg_msg *msg,
692                                    struct task_struct *target, long type,
693                                    int mode)
694 {
695         return 0;
696 }
697
698 static int dummy_shm_alloc_security (struct shmid_kernel *shp)
699 {
700         return 0;
701 }
702
703 static void dummy_shm_free_security (struct shmid_kernel *shp)
704 {
705         return;
706 }
707
708 static int dummy_shm_associate (struct shmid_kernel *shp, int shmflg)
709 {
710         return 0;
711 }
712
713 static int dummy_shm_shmctl (struct shmid_kernel *shp, int cmd)
714 {
715         return 0;
716 }
717
718 static int dummy_shm_shmat (struct shmid_kernel *shp, char __user *shmaddr,
719                             int shmflg)
720 {
721         return 0;
722 }
723
724 static int dummy_sem_alloc_security (struct sem_array *sma)
725 {
726         return 0;
727 }
728
729 static void dummy_sem_free_security (struct sem_array *sma)
730 {
731         return;
732 }
733
734 static int dummy_sem_associate (struct sem_array *sma, int semflg)
735 {
736         return 0;
737 }
738
739 static int dummy_sem_semctl (struct sem_array *sma, int cmd)
740 {
741         return 0;
742 }
743
744 static int dummy_sem_semop (struct sem_array *sma, 
745                             struct sembuf *sops, unsigned nsops, int alter)
746 {
747         return 0;
748 }
749
750 static int dummy_netlink_send (struct sock *sk, struct sk_buff *skb)
751 {
752         NETLINK_CB(skb).eff_cap = current->cap_effective;
753         return 0;
754 }
755
756 static int dummy_netlink_recv (struct sk_buff *skb, int cap)
757 {
758         if (!cap_raised (NETLINK_CB (skb).eff_cap, cap))
759                 return -EPERM;
760         return 0;
761 }
762
763 #ifdef CONFIG_SECURITY_NETWORK
764 static int dummy_unix_stream_connect (struct socket *sock,
765                                       struct socket *other,
766                                       struct sock *newsk)
767 {
768         return 0;
769 }
770
771 static int dummy_unix_may_send (struct socket *sock,
772                                 struct socket *other)
773 {
774         return 0;
775 }
776
777 static int dummy_socket_create (int family, int type,
778                                 int protocol, int kern)
779 {
780         return 0;
781 }
782
783 static int dummy_socket_post_create (struct socket *sock, int family, int type,
784                                      int protocol, int kern)
785 {
786         return 0;
787 }
788
789 static int dummy_socket_bind (struct socket *sock, struct sockaddr *address,
790                               int addrlen)
791 {
792         return 0;
793 }
794
795 static int dummy_socket_connect (struct socket *sock, struct sockaddr *address,
796                                  int addrlen)
797 {
798         return 0;
799 }
800
801 static int dummy_socket_listen (struct socket *sock, int backlog)
802 {
803         return 0;
804 }
805
806 static int dummy_socket_accept (struct socket *sock, struct socket *newsock)
807 {
808         return 0;
809 }
810
811 static void dummy_socket_post_accept (struct socket *sock, 
812                                       struct socket *newsock)
813 {
814         return;
815 }
816
817 static int dummy_socket_sendmsg (struct socket *sock, struct msghdr *msg,
818                                  int size)
819 {
820         return 0;
821 }
822
823 static int dummy_socket_recvmsg (struct socket *sock, struct msghdr *msg,
824                                  int size, int flags)
825 {
826         return 0;
827 }
828
829 static int dummy_socket_getsockname (struct socket *sock)
830 {
831         return 0;
832 }
833
834 static int dummy_socket_getpeername (struct socket *sock)
835 {
836         return 0;
837 }
838
839 static int dummy_socket_setsockopt (struct socket *sock, int level, int optname)
840 {
841         return 0;
842 }
843
844 static int dummy_socket_getsockopt (struct socket *sock, int level, int optname)
845 {
846         return 0;
847 }
848
849 static int dummy_socket_shutdown (struct socket *sock, int how)
850 {
851         return 0;
852 }
853
854 static int dummy_socket_sock_rcv_skb (struct sock *sk, struct sk_buff *skb)
855 {
856         return 0;
857 }
858
859 static int dummy_socket_getpeersec_stream(struct socket *sock, char __user *optval,
860                                           int __user *optlen, unsigned len)
861 {
862         return -ENOPROTOOPT;
863 }
864
865 static int dummy_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid)
866 {
867         return -ENOPROTOOPT;
868 }
869
870 static inline int dummy_sk_alloc_security (struct sock *sk, int family, gfp_t priority)
871 {
872         return 0;
873 }
874
875 static inline void dummy_sk_free_security (struct sock *sk)
876 {
877 }
878
879 static inline void dummy_sk_clone_security (const struct sock *sk, struct sock *newsk)
880 {
881 }
882
883 static inline void dummy_sk_getsecid(struct sock *sk, u32 *secid)
884 {
885 }
886
887 static inline void dummy_sock_graft(struct sock* sk, struct socket *parent)
888 {
889 }
890
891 static inline int dummy_inet_conn_request(struct sock *sk,
892                         struct sk_buff *skb, struct request_sock *req)
893 {
894         return 0;
895 }
896
897 static inline void dummy_inet_csk_clone(struct sock *newsk,
898                         const struct request_sock *req)
899 {
900 }
901
902 static inline void dummy_inet_conn_established(struct sock *sk,
903                         struct sk_buff *skb)
904 {
905 }
906
907 static inline void dummy_req_classify_flow(const struct request_sock *req,
908                         struct flowi *fl)
909 {
910 }
911 #endif  /* CONFIG_SECURITY_NETWORK */
912
913 #ifdef CONFIG_SECURITY_NETWORK_XFRM
914 static int dummy_xfrm_policy_alloc_security(struct xfrm_sec_ctx **ctxp,
915                                             struct xfrm_user_sec_ctx *sec_ctx)
916 {
917         return 0;
918 }
919
920 static inline int dummy_xfrm_policy_clone_security(struct xfrm_sec_ctx *old_ctx,
921                                            struct xfrm_sec_ctx **new_ctxp)
922 {
923         return 0;
924 }
925
926 static void dummy_xfrm_policy_free_security(struct xfrm_sec_ctx *ctx)
927 {
928 }
929
930 static int dummy_xfrm_policy_delete_security(struct xfrm_sec_ctx *ctx)
931 {
932         return 0;
933 }
934
935 static int dummy_xfrm_state_alloc_security(struct xfrm_state *x,
936         struct xfrm_user_sec_ctx *sec_ctx, u32 secid)
937 {
938         return 0;
939 }
940
941 static void dummy_xfrm_state_free_security(struct xfrm_state *x)
942 {
943 }
944
945 static int dummy_xfrm_state_delete_security(struct xfrm_state *x)
946 {
947         return 0;
948 }
949
950 static int dummy_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx,
951                                     u32 sk_sid, u8 dir)
952 {
953         return 0;
954 }
955
956 static int dummy_xfrm_state_pol_flow_match(struct xfrm_state *x,
957                                 struct xfrm_policy *xp, struct flowi *fl)
958 {
959         return 1;
960 }
961
962 static int dummy_xfrm_decode_session(struct sk_buff *skb, u32 *fl, int ckall)
963 {
964         return 0;
965 }
966
967 #endif /* CONFIG_SECURITY_NETWORK_XFRM */
968 static int dummy_register_security (const char *name, struct security_operations *ops)
969 {
970         return -EINVAL;
971 }
972
973 static void dummy_d_instantiate (struct dentry *dentry, struct inode *inode)
974 {
975         return;
976 }
977
978 static int dummy_getprocattr(struct task_struct *p, char *name, char **value)
979 {
980         return -EINVAL;
981 }
982
983 static int dummy_setprocattr(struct task_struct *p, char *name, void *value, size_t size)
984 {
985         return -EINVAL;
986 }
987
988 static int dummy_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
989 {
990         return -EOPNOTSUPP;
991 }
992
993 static int dummy_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
994 {
995         return -EOPNOTSUPP;
996 }
997
998 static void dummy_release_secctx(char *secdata, u32 seclen)
999 {
1000 }
1001
1002 #ifdef CONFIG_KEYS
1003 static inline int dummy_key_alloc(struct key *key, struct task_struct *ctx,
1004                                   unsigned long flags)
1005 {
1006         return 0;
1007 }
1008
1009 static inline void dummy_key_free(struct key *key)
1010 {
1011 }
1012
1013 static inline int dummy_key_permission(key_ref_t key_ref,
1014                                        struct task_struct *context,
1015                                        key_perm_t perm)
1016 {
1017         return 0;
1018 }
1019
1020 static int dummy_key_getsecurity(struct key *key, char **_buffer)
1021 {
1022         *_buffer = NULL;
1023         return 0;
1024 }
1025
1026 #endif /* CONFIG_KEYS */
1027
1028 #ifdef CONFIG_AUDIT
1029 static inline int dummy_audit_rule_init(u32 field, u32 op, char *rulestr,
1030                                         void **lsmrule)
1031 {
1032         return 0;
1033 }
1034
1035 static inline int dummy_audit_rule_known(struct audit_krule *krule)
1036 {
1037         return 0;
1038 }
1039
1040 static inline int dummy_audit_rule_match(u32 secid, u32 field, u32 op,
1041                                          void *lsmrule,
1042                                          struct audit_context *actx)
1043 {
1044         return 0;
1045 }
1046
1047 static inline void dummy_audit_rule_free(void *lsmrule)
1048 { }
1049
1050 #endif /* CONFIG_AUDIT */
1051
1052 struct security_operations dummy_security_ops = {
1053         .name = "dummy",
1054 };
1055
1056 #define set_to_dummy_if_null(ops, function)                             \
1057         do {                                                            \
1058                 if (!ops->function) {                                   \
1059                         ops->function = dummy_##function;               \
1060                         pr_debug("Had to override the " #function       \
1061                                  " security operation with the dummy one.\n");\
1062                         }                                               \
1063         } while (0)
1064
1065 void security_fixup_ops (struct security_operations *ops)
1066 {
1067         set_to_dummy_if_null(ops, ptrace);
1068         set_to_dummy_if_null(ops, capget);
1069         set_to_dummy_if_null(ops, capset_check);
1070         set_to_dummy_if_null(ops, capset_set);
1071         set_to_dummy_if_null(ops, acct);
1072         set_to_dummy_if_null(ops, capable);
1073         set_to_dummy_if_null(ops, quotactl);
1074         set_to_dummy_if_null(ops, quota_on);
1075         set_to_dummy_if_null(ops, sysctl);
1076         set_to_dummy_if_null(ops, syslog);
1077         set_to_dummy_if_null(ops, settime);
1078         set_to_dummy_if_null(ops, vm_enough_memory);
1079         set_to_dummy_if_null(ops, bprm_alloc_security);
1080         set_to_dummy_if_null(ops, bprm_free_security);
1081         set_to_dummy_if_null(ops, bprm_apply_creds);
1082         set_to_dummy_if_null(ops, bprm_post_apply_creds);
1083         set_to_dummy_if_null(ops, bprm_set_security);
1084         set_to_dummy_if_null(ops, bprm_check_security);
1085         set_to_dummy_if_null(ops, bprm_secureexec);
1086         set_to_dummy_if_null(ops, sb_alloc_security);
1087         set_to_dummy_if_null(ops, sb_free_security);
1088         set_to_dummy_if_null(ops, sb_copy_data);
1089         set_to_dummy_if_null(ops, sb_kern_mount);
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_get_mnt_opts);
1101         set_to_dummy_if_null(ops, sb_set_mnt_opts);
1102         set_to_dummy_if_null(ops, sb_clone_mnt_opts);
1103         set_to_dummy_if_null(ops, sb_parse_opts_str);
1104         set_to_dummy_if_null(ops, inode_alloc_security);
1105         set_to_dummy_if_null(ops, inode_free_security);
1106         set_to_dummy_if_null(ops, inode_init_security);
1107         set_to_dummy_if_null(ops, inode_create);
1108         set_to_dummy_if_null(ops, inode_link);
1109         set_to_dummy_if_null(ops, inode_unlink);
1110         set_to_dummy_if_null(ops, inode_symlink);
1111         set_to_dummy_if_null(ops, inode_mkdir);
1112         set_to_dummy_if_null(ops, inode_rmdir);
1113         set_to_dummy_if_null(ops, inode_mknod);
1114         set_to_dummy_if_null(ops, inode_rename);
1115         set_to_dummy_if_null(ops, inode_readlink);
1116         set_to_dummy_if_null(ops, inode_follow_link);
1117         set_to_dummy_if_null(ops, inode_permission);
1118         set_to_dummy_if_null(ops, inode_setattr);
1119         set_to_dummy_if_null(ops, inode_getattr);
1120         set_to_dummy_if_null(ops, inode_delete);
1121         set_to_dummy_if_null(ops, inode_setxattr);
1122         set_to_dummy_if_null(ops, inode_post_setxattr);
1123         set_to_dummy_if_null(ops, inode_getxattr);
1124         set_to_dummy_if_null(ops, inode_listxattr);
1125         set_to_dummy_if_null(ops, inode_removexattr);
1126         set_to_dummy_if_null(ops, inode_need_killpriv);
1127         set_to_dummy_if_null(ops, inode_killpriv);
1128         set_to_dummy_if_null(ops, inode_getsecurity);
1129         set_to_dummy_if_null(ops, inode_setsecurity);
1130         set_to_dummy_if_null(ops, inode_listsecurity);
1131         set_to_dummy_if_null(ops, inode_getsecid);
1132         set_to_dummy_if_null(ops, file_permission);
1133         set_to_dummy_if_null(ops, file_alloc_security);
1134         set_to_dummy_if_null(ops, file_free_security);
1135         set_to_dummy_if_null(ops, file_ioctl);
1136         set_to_dummy_if_null(ops, file_mmap);
1137         set_to_dummy_if_null(ops, file_mprotect);
1138         set_to_dummy_if_null(ops, file_lock);
1139         set_to_dummy_if_null(ops, file_fcntl);
1140         set_to_dummy_if_null(ops, file_set_fowner);
1141         set_to_dummy_if_null(ops, file_send_sigiotask);
1142         set_to_dummy_if_null(ops, file_receive);
1143         set_to_dummy_if_null(ops, dentry_open);
1144         set_to_dummy_if_null(ops, task_create);
1145         set_to_dummy_if_null(ops, task_alloc_security);
1146         set_to_dummy_if_null(ops, task_free_security);
1147         set_to_dummy_if_null(ops, task_setuid);
1148         set_to_dummy_if_null(ops, task_post_setuid);
1149         set_to_dummy_if_null(ops, task_setgid);
1150         set_to_dummy_if_null(ops, task_setpgid);
1151         set_to_dummy_if_null(ops, task_getpgid);
1152         set_to_dummy_if_null(ops, task_getsid);
1153         set_to_dummy_if_null(ops, task_getsecid);
1154         set_to_dummy_if_null(ops, task_setgroups);
1155         set_to_dummy_if_null(ops, task_setnice);
1156         set_to_dummy_if_null(ops, task_setioprio);
1157         set_to_dummy_if_null(ops, task_getioprio);
1158         set_to_dummy_if_null(ops, task_setrlimit);
1159         set_to_dummy_if_null(ops, task_setscheduler);
1160         set_to_dummy_if_null(ops, task_getscheduler);
1161         set_to_dummy_if_null(ops, task_movememory);
1162         set_to_dummy_if_null(ops, task_wait);
1163         set_to_dummy_if_null(ops, task_kill);
1164         set_to_dummy_if_null(ops, task_prctl);
1165         set_to_dummy_if_null(ops, task_reparent_to_init);
1166         set_to_dummy_if_null(ops, task_to_inode);
1167         set_to_dummy_if_null(ops, ipc_permission);
1168         set_to_dummy_if_null(ops, ipc_getsecid);
1169         set_to_dummy_if_null(ops, msg_msg_alloc_security);
1170         set_to_dummy_if_null(ops, msg_msg_free_security);
1171         set_to_dummy_if_null(ops, msg_queue_alloc_security);
1172         set_to_dummy_if_null(ops, msg_queue_free_security);
1173         set_to_dummy_if_null(ops, msg_queue_associate);
1174         set_to_dummy_if_null(ops, msg_queue_msgctl);
1175         set_to_dummy_if_null(ops, msg_queue_msgsnd);
1176         set_to_dummy_if_null(ops, msg_queue_msgrcv);
1177         set_to_dummy_if_null(ops, shm_alloc_security);
1178         set_to_dummy_if_null(ops, shm_free_security);
1179         set_to_dummy_if_null(ops, shm_associate);
1180         set_to_dummy_if_null(ops, shm_shmctl);
1181         set_to_dummy_if_null(ops, shm_shmat);
1182         set_to_dummy_if_null(ops, sem_alloc_security);
1183         set_to_dummy_if_null(ops, sem_free_security);
1184         set_to_dummy_if_null(ops, sem_associate);
1185         set_to_dummy_if_null(ops, sem_semctl);
1186         set_to_dummy_if_null(ops, sem_semop);
1187         set_to_dummy_if_null(ops, netlink_send);
1188         set_to_dummy_if_null(ops, netlink_recv);
1189         set_to_dummy_if_null(ops, register_security);
1190         set_to_dummy_if_null(ops, d_instantiate);
1191         set_to_dummy_if_null(ops, getprocattr);
1192         set_to_dummy_if_null(ops, setprocattr);
1193         set_to_dummy_if_null(ops, secid_to_secctx);
1194         set_to_dummy_if_null(ops, secctx_to_secid);
1195         set_to_dummy_if_null(ops, release_secctx);
1196 #ifdef CONFIG_SECURITY_NETWORK
1197         set_to_dummy_if_null(ops, unix_stream_connect);
1198         set_to_dummy_if_null(ops, unix_may_send);
1199         set_to_dummy_if_null(ops, socket_create);
1200         set_to_dummy_if_null(ops, socket_post_create);
1201         set_to_dummy_if_null(ops, socket_bind);
1202         set_to_dummy_if_null(ops, socket_connect);
1203         set_to_dummy_if_null(ops, socket_listen);
1204         set_to_dummy_if_null(ops, socket_accept);
1205         set_to_dummy_if_null(ops, socket_post_accept);
1206         set_to_dummy_if_null(ops, socket_sendmsg);
1207         set_to_dummy_if_null(ops, socket_recvmsg);
1208         set_to_dummy_if_null(ops, socket_getsockname);
1209         set_to_dummy_if_null(ops, socket_getpeername);
1210         set_to_dummy_if_null(ops, socket_setsockopt);
1211         set_to_dummy_if_null(ops, socket_getsockopt);
1212         set_to_dummy_if_null(ops, socket_shutdown);
1213         set_to_dummy_if_null(ops, socket_sock_rcv_skb);
1214         set_to_dummy_if_null(ops, socket_getpeersec_stream);
1215         set_to_dummy_if_null(ops, socket_getpeersec_dgram);
1216         set_to_dummy_if_null(ops, sk_alloc_security);
1217         set_to_dummy_if_null(ops, sk_free_security);
1218         set_to_dummy_if_null(ops, sk_clone_security);
1219         set_to_dummy_if_null(ops, sk_getsecid);
1220         set_to_dummy_if_null(ops, sock_graft);
1221         set_to_dummy_if_null(ops, inet_conn_request);
1222         set_to_dummy_if_null(ops, inet_csk_clone);
1223         set_to_dummy_if_null(ops, inet_conn_established);
1224         set_to_dummy_if_null(ops, req_classify_flow);
1225  #endif /* CONFIG_SECURITY_NETWORK */
1226 #ifdef  CONFIG_SECURITY_NETWORK_XFRM
1227         set_to_dummy_if_null(ops, xfrm_policy_alloc_security);
1228         set_to_dummy_if_null(ops, xfrm_policy_clone_security);
1229         set_to_dummy_if_null(ops, xfrm_policy_free_security);
1230         set_to_dummy_if_null(ops, xfrm_policy_delete_security);
1231         set_to_dummy_if_null(ops, xfrm_state_alloc_security);
1232         set_to_dummy_if_null(ops, xfrm_state_free_security);
1233         set_to_dummy_if_null(ops, xfrm_state_delete_security);
1234         set_to_dummy_if_null(ops, xfrm_policy_lookup);
1235         set_to_dummy_if_null(ops, xfrm_state_pol_flow_match);
1236         set_to_dummy_if_null(ops, xfrm_decode_session);
1237 #endif  /* CONFIG_SECURITY_NETWORK_XFRM */
1238 #ifdef CONFIG_KEYS
1239         set_to_dummy_if_null(ops, key_alloc);
1240         set_to_dummy_if_null(ops, key_free);
1241         set_to_dummy_if_null(ops, key_permission);
1242         set_to_dummy_if_null(ops, key_getsecurity);
1243 #endif  /* CONFIG_KEYS */
1244 #ifdef CONFIG_AUDIT
1245         set_to_dummy_if_null(ops, audit_rule_init);
1246         set_to_dummy_if_null(ops, audit_rule_known);
1247         set_to_dummy_if_null(ops, audit_rule_match);
1248         set_to_dummy_if_null(ops, audit_rule_free);
1249 #endif
1250 }
1251