memstick: add support for 8-bit parallel mode
[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         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 (char *orig, char *copy)
185 {
186         return 0;
187 }
188
189 static int dummy_sb_kern_mount (struct super_block *sb, void *data)
190 {
191         return 0;
192 }
193
194 static int dummy_sb_statfs (struct dentry *dentry)
195 {
196         return 0;
197 }
198
199 static int dummy_sb_mount (char *dev_name, struct nameidata *nd, char *type,
200                            unsigned long flags, void *data)
201 {
202         return 0;
203 }
204
205 static int dummy_sb_check_sb (struct vfsmount *mnt, struct nameidata *nd)
206 {
207         return 0;
208 }
209
210 static int dummy_sb_umount (struct vfsmount *mnt, int flags)
211 {
212         return 0;
213 }
214
215 static void dummy_sb_umount_close (struct vfsmount *mnt)
216 {
217         return;
218 }
219
220 static void dummy_sb_umount_busy (struct vfsmount *mnt)
221 {
222         return;
223 }
224
225 static void dummy_sb_post_remount (struct vfsmount *mnt, unsigned long flags,
226                                    void *data)
227 {
228         return;
229 }
230
231
232 static void dummy_sb_post_addmount (struct vfsmount *mnt, struct nameidata *nd)
233 {
234         return;
235 }
236
237 static int dummy_sb_pivotroot (struct nameidata *old_nd, struct nameidata *new_nd)
238 {
239         return 0;
240 }
241
242 static void dummy_sb_post_pivotroot (struct nameidata *old_nd, struct nameidata *new_nd)
243 {
244         return;
245 }
246
247 static int dummy_sb_get_mnt_opts(const struct super_block *sb,
248                                  struct security_mnt_opts *opts)
249 {
250         security_init_mnt_opts(opts);
251         return 0;
252 }
253
254 static int dummy_sb_set_mnt_opts(struct super_block *sb,
255                                  struct security_mnt_opts *opts)
256 {
257         if (unlikely(opts->num_mnt_opts))
258                 return -EOPNOTSUPP;
259         return 0;
260 }
261
262 static void dummy_sb_clone_mnt_opts(const struct super_block *oldsb,
263                                     struct super_block *newsb)
264 {
265         return;
266 }
267
268 static int dummy_sb_parse_opts_str(char *options, struct security_mnt_opts *opts)
269 {
270         return 0;
271 }
272
273 static int dummy_inode_alloc_security (struct inode *inode)
274 {
275         return 0;
276 }
277
278 static void dummy_inode_free_security (struct inode *inode)
279 {
280         return;
281 }
282
283 static int dummy_inode_init_security (struct inode *inode, struct inode *dir,
284                                       char **name, void **value, size_t *len)
285 {
286         return -EOPNOTSUPP;
287 }
288
289 static int dummy_inode_create (struct inode *inode, struct dentry *dentry,
290                                int mask)
291 {
292         return 0;
293 }
294
295 static int dummy_inode_link (struct dentry *old_dentry, struct inode *inode,
296                              struct dentry *new_dentry)
297 {
298         return 0;
299 }
300
301 static int dummy_inode_unlink (struct inode *inode, struct dentry *dentry)
302 {
303         return 0;
304 }
305
306 static int dummy_inode_symlink (struct inode *inode, struct dentry *dentry,
307                                 const char *name)
308 {
309         return 0;
310 }
311
312 static int dummy_inode_mkdir (struct inode *inode, struct dentry *dentry,
313                               int mask)
314 {
315         return 0;
316 }
317
318 static int dummy_inode_rmdir (struct inode *inode, struct dentry *dentry)
319 {
320         return 0;
321 }
322
323 static int dummy_inode_mknod (struct inode *inode, struct dentry *dentry,
324                               int mode, dev_t dev)
325 {
326         return 0;
327 }
328
329 static int dummy_inode_rename (struct inode *old_inode,
330                                struct dentry *old_dentry,
331                                struct inode *new_inode,
332                                struct dentry *new_dentry)
333 {
334         return 0;
335 }
336
337 static int dummy_inode_readlink (struct dentry *dentry)
338 {
339         return 0;
340 }
341
342 static int dummy_inode_follow_link (struct dentry *dentry,
343                                     struct nameidata *nameidata)
344 {
345         return 0;
346 }
347
348 static int dummy_inode_permission (struct inode *inode, int mask, struct nameidata *nd)
349 {
350         return 0;
351 }
352
353 static int dummy_inode_setattr (struct dentry *dentry, struct iattr *iattr)
354 {
355         return 0;
356 }
357
358 static int dummy_inode_getattr (struct vfsmount *mnt, struct dentry *dentry)
359 {
360         return 0;
361 }
362
363 static void dummy_inode_delete (struct inode *ino)
364 {
365         return;
366 }
367
368 static int dummy_inode_setxattr (struct dentry *dentry, char *name, void *value,
369                                 size_t size, int flags)
370 {
371         if (!strncmp(name, XATTR_SECURITY_PREFIX,
372                      sizeof(XATTR_SECURITY_PREFIX) - 1) &&
373             !capable(CAP_SYS_ADMIN))
374                 return -EPERM;
375         return 0;
376 }
377
378 static void dummy_inode_post_setxattr (struct dentry *dentry, char *name, void *value,
379                                        size_t size, int flags)
380 {
381 }
382
383 static int dummy_inode_getxattr (struct dentry *dentry, char *name)
384 {
385         return 0;
386 }
387
388 static int dummy_inode_listxattr (struct dentry *dentry)
389 {
390         return 0;
391 }
392
393 static int dummy_inode_removexattr (struct dentry *dentry, char *name)
394 {
395         if (!strncmp(name, XATTR_SECURITY_PREFIX,
396                      sizeof(XATTR_SECURITY_PREFIX) - 1) &&
397             !capable(CAP_SYS_ADMIN))
398                 return -EPERM;
399         return 0;
400 }
401
402 static int dummy_inode_need_killpriv(struct dentry *dentry)
403 {
404         return 0;
405 }
406
407 static int dummy_inode_killpriv(struct dentry *dentry)
408 {
409         return 0;
410 }
411
412 static int dummy_inode_getsecurity(const struct inode *inode, const char *name, void **buffer, bool alloc)
413 {
414         return -EOPNOTSUPP;
415 }
416
417 static int dummy_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags)
418 {
419         return -EOPNOTSUPP;
420 }
421
422 static int dummy_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
423 {
424         return 0;
425 }
426
427 static int dummy_file_permission (struct file *file, int mask)
428 {
429         return 0;
430 }
431
432 static int dummy_file_alloc_security (struct file *file)
433 {
434         return 0;
435 }
436
437 static void dummy_file_free_security (struct file *file)
438 {
439         return;
440 }
441
442 static int dummy_file_ioctl (struct file *file, unsigned int command,
443                              unsigned long arg)
444 {
445         return 0;
446 }
447
448 static int dummy_file_mmap (struct file *file, unsigned long reqprot,
449                             unsigned long prot,
450                             unsigned long flags,
451                             unsigned long addr,
452                             unsigned long addr_only)
453 {
454         if ((addr < mmap_min_addr) && !capable(CAP_SYS_RAWIO))
455                 return -EACCES;
456         return 0;
457 }
458
459 static int dummy_file_mprotect (struct vm_area_struct *vma,
460                                 unsigned long reqprot,
461                                 unsigned long prot)
462 {
463         return 0;
464 }
465
466 static int dummy_file_lock (struct file *file, unsigned int cmd)
467 {
468         return 0;
469 }
470
471 static int dummy_file_fcntl (struct file *file, unsigned int cmd,
472                              unsigned long arg)
473 {
474         return 0;
475 }
476
477 static int dummy_file_set_fowner (struct file *file)
478 {
479         return 0;
480 }
481
482 static int dummy_file_send_sigiotask (struct task_struct *tsk,
483                                       struct fown_struct *fown, int sig)
484 {
485         return 0;
486 }
487
488 static int dummy_file_receive (struct file *file)
489 {
490         return 0;
491 }
492
493 static int dummy_dentry_open (struct file *file)
494 {
495         return 0;
496 }
497
498 static int dummy_task_create (unsigned long clone_flags)
499 {
500         return 0;
501 }
502
503 static int dummy_task_alloc_security (struct task_struct *p)
504 {
505         return 0;
506 }
507
508 static void dummy_task_free_security (struct task_struct *p)
509 {
510         return;
511 }
512
513 static int dummy_task_setuid (uid_t id0, uid_t id1, uid_t id2, int flags)
514 {
515         return 0;
516 }
517
518 static int dummy_task_post_setuid (uid_t id0, uid_t id1, uid_t id2, int flags)
519 {
520         dummy_capget(current, &current->cap_effective, &current->cap_inheritable, &current->cap_permitted);
521         return 0;
522 }
523
524 static int dummy_task_setgid (gid_t id0, gid_t id1, gid_t id2, int flags)
525 {
526         return 0;
527 }
528
529 static int dummy_task_setpgid (struct task_struct *p, pid_t pgid)
530 {
531         return 0;
532 }
533
534 static int dummy_task_getpgid (struct task_struct *p)
535 {
536         return 0;
537 }
538
539 static int dummy_task_getsid (struct task_struct *p)
540 {
541         return 0;
542 }
543
544 static void dummy_task_getsecid (struct task_struct *p, u32 *secid)
545 { }
546
547 static int dummy_task_setgroups (struct group_info *group_info)
548 {
549         return 0;
550 }
551
552 static int dummy_task_setnice (struct task_struct *p, int nice)
553 {
554         return 0;
555 }
556
557 static int dummy_task_setioprio (struct task_struct *p, int ioprio)
558 {
559         return 0;
560 }
561
562 static int dummy_task_getioprio (struct task_struct *p)
563 {
564         return 0;
565 }
566
567 static int dummy_task_setrlimit (unsigned int resource, struct rlimit *new_rlim)
568 {
569         return 0;
570 }
571
572 static int dummy_task_setscheduler (struct task_struct *p, int policy,
573                                     struct sched_param *lp)
574 {
575         return 0;
576 }
577
578 static int dummy_task_getscheduler (struct task_struct *p)
579 {
580         return 0;
581 }
582
583 static int dummy_task_movememory (struct task_struct *p)
584 {
585         return 0;
586 }
587
588 static int dummy_task_wait (struct task_struct *p)
589 {
590         return 0;
591 }
592
593 static int dummy_task_kill (struct task_struct *p, struct siginfo *info,
594                             int sig, u32 secid)
595 {
596         return 0;
597 }
598
599 static int dummy_task_prctl (int option, unsigned long arg2, unsigned long arg3,
600                              unsigned long arg4, unsigned long arg5)
601 {
602         return 0;
603 }
604
605 static void dummy_task_reparent_to_init (struct task_struct *p)
606 {
607         p->euid = p->fsuid = 0;
608         return;
609 }
610
611 static void dummy_task_to_inode(struct task_struct *p, struct inode *inode)
612 { }
613
614 static int dummy_ipc_permission (struct kern_ipc_perm *ipcp, short flag)
615 {
616         return 0;
617 }
618
619 static int dummy_msg_msg_alloc_security (struct msg_msg *msg)
620 {
621         return 0;
622 }
623
624 static void dummy_msg_msg_free_security (struct msg_msg *msg)
625 {
626         return;
627 }
628
629 static int dummy_msg_queue_alloc_security (struct msg_queue *msq)
630 {
631         return 0;
632 }
633
634 static void dummy_msg_queue_free_security (struct msg_queue *msq)
635 {
636         return;
637 }
638
639 static int dummy_msg_queue_associate (struct msg_queue *msq, 
640                                       int msqflg)
641 {
642         return 0;
643 }
644
645 static int dummy_msg_queue_msgctl (struct msg_queue *msq, int cmd)
646 {
647         return 0;
648 }
649
650 static int dummy_msg_queue_msgsnd (struct msg_queue *msq, struct msg_msg *msg,
651                                    int msgflg)
652 {
653         return 0;
654 }
655
656 static int dummy_msg_queue_msgrcv (struct msg_queue *msq, struct msg_msg *msg,
657                                    struct task_struct *target, long type,
658                                    int mode)
659 {
660         return 0;
661 }
662
663 static int dummy_shm_alloc_security (struct shmid_kernel *shp)
664 {
665         return 0;
666 }
667
668 static void dummy_shm_free_security (struct shmid_kernel *shp)
669 {
670         return;
671 }
672
673 static int dummy_shm_associate (struct shmid_kernel *shp, int shmflg)
674 {
675         return 0;
676 }
677
678 static int dummy_shm_shmctl (struct shmid_kernel *shp, int cmd)
679 {
680         return 0;
681 }
682
683 static int dummy_shm_shmat (struct shmid_kernel *shp, char __user *shmaddr,
684                             int shmflg)
685 {
686         return 0;
687 }
688
689 static int dummy_sem_alloc_security (struct sem_array *sma)
690 {
691         return 0;
692 }
693
694 static void dummy_sem_free_security (struct sem_array *sma)
695 {
696         return;
697 }
698
699 static int dummy_sem_associate (struct sem_array *sma, int semflg)
700 {
701         return 0;
702 }
703
704 static int dummy_sem_semctl (struct sem_array *sma, int cmd)
705 {
706         return 0;
707 }
708
709 static int dummy_sem_semop (struct sem_array *sma, 
710                             struct sembuf *sops, unsigned nsops, int alter)
711 {
712         return 0;
713 }
714
715 static int dummy_netlink_send (struct sock *sk, struct sk_buff *skb)
716 {
717         NETLINK_CB(skb).eff_cap = current->cap_effective;
718         return 0;
719 }
720
721 static int dummy_netlink_recv (struct sk_buff *skb, int cap)
722 {
723         if (!cap_raised (NETLINK_CB (skb).eff_cap, cap))
724                 return -EPERM;
725         return 0;
726 }
727
728 #ifdef CONFIG_SECURITY_NETWORK
729 static int dummy_unix_stream_connect (struct socket *sock,
730                                       struct socket *other,
731                                       struct sock *newsk)
732 {
733         return 0;
734 }
735
736 static int dummy_unix_may_send (struct socket *sock,
737                                 struct socket *other)
738 {
739         return 0;
740 }
741
742 static int dummy_socket_create (int family, int type,
743                                 int protocol, int kern)
744 {
745         return 0;
746 }
747
748 static int dummy_socket_post_create (struct socket *sock, int family, int type,
749                                      int protocol, int kern)
750 {
751         return 0;
752 }
753
754 static int dummy_socket_bind (struct socket *sock, struct sockaddr *address,
755                               int addrlen)
756 {
757         return 0;
758 }
759
760 static int dummy_socket_connect (struct socket *sock, struct sockaddr *address,
761                                  int addrlen)
762 {
763         return 0;
764 }
765
766 static int dummy_socket_listen (struct socket *sock, int backlog)
767 {
768         return 0;
769 }
770
771 static int dummy_socket_accept (struct socket *sock, struct socket *newsock)
772 {
773         return 0;
774 }
775
776 static void dummy_socket_post_accept (struct socket *sock, 
777                                       struct socket *newsock)
778 {
779         return;
780 }
781
782 static int dummy_socket_sendmsg (struct socket *sock, struct msghdr *msg,
783                                  int size)
784 {
785         return 0;
786 }
787
788 static int dummy_socket_recvmsg (struct socket *sock, struct msghdr *msg,
789                                  int size, int flags)
790 {
791         return 0;
792 }
793
794 static int dummy_socket_getsockname (struct socket *sock)
795 {
796         return 0;
797 }
798
799 static int dummy_socket_getpeername (struct socket *sock)
800 {
801         return 0;
802 }
803
804 static int dummy_socket_setsockopt (struct socket *sock, int level, int optname)
805 {
806         return 0;
807 }
808
809 static int dummy_socket_getsockopt (struct socket *sock, int level, int optname)
810 {
811         return 0;
812 }
813
814 static int dummy_socket_shutdown (struct socket *sock, int how)
815 {
816         return 0;
817 }
818
819 static int dummy_socket_sock_rcv_skb (struct sock *sk, struct sk_buff *skb)
820 {
821         return 0;
822 }
823
824 static int dummy_socket_getpeersec_stream(struct socket *sock, char __user *optval,
825                                           int __user *optlen, unsigned len)
826 {
827         return -ENOPROTOOPT;
828 }
829
830 static int dummy_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid)
831 {
832         return -ENOPROTOOPT;
833 }
834
835 static inline int dummy_sk_alloc_security (struct sock *sk, int family, gfp_t priority)
836 {
837         return 0;
838 }
839
840 static inline void dummy_sk_free_security (struct sock *sk)
841 {
842 }
843
844 static inline void dummy_sk_clone_security (const struct sock *sk, struct sock *newsk)
845 {
846 }
847
848 static inline void dummy_sk_getsecid(struct sock *sk, u32 *secid)
849 {
850 }
851
852 static inline void dummy_sock_graft(struct sock* sk, struct socket *parent)
853 {
854 }
855
856 static inline int dummy_inet_conn_request(struct sock *sk,
857                         struct sk_buff *skb, struct request_sock *req)
858 {
859         return 0;
860 }
861
862 static inline void dummy_inet_csk_clone(struct sock *newsk,
863                         const struct request_sock *req)
864 {
865 }
866
867 static inline void dummy_inet_conn_established(struct sock *sk,
868                         struct sk_buff *skb)
869 {
870 }
871
872 static inline void dummy_req_classify_flow(const struct request_sock *req,
873                         struct flowi *fl)
874 {
875 }
876 #endif  /* CONFIG_SECURITY_NETWORK */
877
878 #ifdef CONFIG_SECURITY_NETWORK_XFRM
879 static int dummy_xfrm_policy_alloc_security(struct xfrm_policy *xp,
880                 struct xfrm_user_sec_ctx *sec_ctx)
881 {
882         return 0;
883 }
884
885 static inline int dummy_xfrm_policy_clone_security(struct xfrm_policy *old, struct xfrm_policy *new)
886 {
887         return 0;
888 }
889
890 static void dummy_xfrm_policy_free_security(struct xfrm_policy *xp)
891 {
892 }
893
894 static int dummy_xfrm_policy_delete_security(struct xfrm_policy *xp)
895 {
896         return 0;
897 }
898
899 static int dummy_xfrm_state_alloc_security(struct xfrm_state *x,
900         struct xfrm_user_sec_ctx *sec_ctx, u32 secid)
901 {
902         return 0;
903 }
904
905 static void dummy_xfrm_state_free_security(struct xfrm_state *x)
906 {
907 }
908
909 static int dummy_xfrm_state_delete_security(struct xfrm_state *x)
910 {
911         return 0;
912 }
913
914 static int dummy_xfrm_policy_lookup(struct xfrm_policy *xp, u32 sk_sid, u8 dir)
915 {
916         return 0;
917 }
918
919 static int dummy_xfrm_state_pol_flow_match(struct xfrm_state *x,
920                                 struct xfrm_policy *xp, struct flowi *fl)
921 {
922         return 1;
923 }
924
925 static int dummy_xfrm_decode_session(struct sk_buff *skb, u32 *fl, int ckall)
926 {
927         return 0;
928 }
929
930 #endif /* CONFIG_SECURITY_NETWORK_XFRM */
931 static int dummy_register_security (const char *name, struct security_operations *ops)
932 {
933         return -EINVAL;
934 }
935
936 static void dummy_d_instantiate (struct dentry *dentry, struct inode *inode)
937 {
938         return;
939 }
940
941 static int dummy_getprocattr(struct task_struct *p, char *name, char **value)
942 {
943         return -EINVAL;
944 }
945
946 static int dummy_setprocattr(struct task_struct *p, char *name, void *value, size_t size)
947 {
948         return -EINVAL;
949 }
950
951 static int dummy_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
952 {
953         return -EOPNOTSUPP;
954 }
955
956 static int dummy_secctx_to_secid(char *secdata, u32 seclen, u32 *secid)
957 {
958         return -EOPNOTSUPP;
959 }
960
961 static void dummy_release_secctx(char *secdata, u32 seclen)
962 {
963 }
964
965 #ifdef CONFIG_KEYS
966 static inline int dummy_key_alloc(struct key *key, struct task_struct *ctx,
967                                   unsigned long flags)
968 {
969         return 0;
970 }
971
972 static inline void dummy_key_free(struct key *key)
973 {
974 }
975
976 static inline int dummy_key_permission(key_ref_t key_ref,
977                                        struct task_struct *context,
978                                        key_perm_t perm)
979 {
980         return 0;
981 }
982 #endif /* CONFIG_KEYS */
983
984 struct security_operations dummy_security_ops;
985
986 #define set_to_dummy_if_null(ops, function)                             \
987         do {                                                            \
988                 if (!ops->function) {                                   \
989                         ops->function = dummy_##function;               \
990                         pr_debug("Had to override the " #function       \
991                                  " security operation with the dummy one.\n");\
992                         }                                               \
993         } while (0)
994
995 void security_fixup_ops (struct security_operations *ops)
996 {
997         set_to_dummy_if_null(ops, ptrace);
998         set_to_dummy_if_null(ops, capget);
999         set_to_dummy_if_null(ops, capset_check);
1000         set_to_dummy_if_null(ops, capset_set);
1001         set_to_dummy_if_null(ops, acct);
1002         set_to_dummy_if_null(ops, capable);
1003         set_to_dummy_if_null(ops, quotactl);
1004         set_to_dummy_if_null(ops, quota_on);
1005         set_to_dummy_if_null(ops, sysctl);
1006         set_to_dummy_if_null(ops, syslog);
1007         set_to_dummy_if_null(ops, settime);
1008         set_to_dummy_if_null(ops, vm_enough_memory);
1009         set_to_dummy_if_null(ops, bprm_alloc_security);
1010         set_to_dummy_if_null(ops, bprm_free_security);
1011         set_to_dummy_if_null(ops, bprm_apply_creds);
1012         set_to_dummy_if_null(ops, bprm_post_apply_creds);
1013         set_to_dummy_if_null(ops, bprm_set_security);
1014         set_to_dummy_if_null(ops, bprm_check_security);
1015         set_to_dummy_if_null(ops, bprm_secureexec);
1016         set_to_dummy_if_null(ops, sb_alloc_security);
1017         set_to_dummy_if_null(ops, sb_free_security);
1018         set_to_dummy_if_null(ops, sb_copy_data);
1019         set_to_dummy_if_null(ops, sb_kern_mount);
1020         set_to_dummy_if_null(ops, sb_statfs);
1021         set_to_dummy_if_null(ops, sb_mount);
1022         set_to_dummy_if_null(ops, sb_check_sb);
1023         set_to_dummy_if_null(ops, sb_umount);
1024         set_to_dummy_if_null(ops, sb_umount_close);
1025         set_to_dummy_if_null(ops, sb_umount_busy);
1026         set_to_dummy_if_null(ops, sb_post_remount);
1027         set_to_dummy_if_null(ops, sb_post_addmount);
1028         set_to_dummy_if_null(ops, sb_pivotroot);
1029         set_to_dummy_if_null(ops, sb_post_pivotroot);
1030         set_to_dummy_if_null(ops, sb_get_mnt_opts);
1031         set_to_dummy_if_null(ops, sb_set_mnt_opts);
1032         set_to_dummy_if_null(ops, sb_clone_mnt_opts);
1033         set_to_dummy_if_null(ops, sb_parse_opts_str);
1034         set_to_dummy_if_null(ops, inode_alloc_security);
1035         set_to_dummy_if_null(ops, inode_free_security);
1036         set_to_dummy_if_null(ops, inode_init_security);
1037         set_to_dummy_if_null(ops, inode_create);
1038         set_to_dummy_if_null(ops, inode_link);
1039         set_to_dummy_if_null(ops, inode_unlink);
1040         set_to_dummy_if_null(ops, inode_symlink);
1041         set_to_dummy_if_null(ops, inode_mkdir);
1042         set_to_dummy_if_null(ops, inode_rmdir);
1043         set_to_dummy_if_null(ops, inode_mknod);
1044         set_to_dummy_if_null(ops, inode_rename);
1045         set_to_dummy_if_null(ops, inode_readlink);
1046         set_to_dummy_if_null(ops, inode_follow_link);
1047         set_to_dummy_if_null(ops, inode_permission);
1048         set_to_dummy_if_null(ops, inode_setattr);
1049         set_to_dummy_if_null(ops, inode_getattr);
1050         set_to_dummy_if_null(ops, inode_delete);
1051         set_to_dummy_if_null(ops, inode_setxattr);
1052         set_to_dummy_if_null(ops, inode_post_setxattr);
1053         set_to_dummy_if_null(ops, inode_getxattr);
1054         set_to_dummy_if_null(ops, inode_listxattr);
1055         set_to_dummy_if_null(ops, inode_removexattr);
1056         set_to_dummy_if_null(ops, inode_need_killpriv);
1057         set_to_dummy_if_null(ops, inode_killpriv);
1058         set_to_dummy_if_null(ops, inode_getsecurity);
1059         set_to_dummy_if_null(ops, inode_setsecurity);
1060         set_to_dummy_if_null(ops, inode_listsecurity);
1061         set_to_dummy_if_null(ops, file_permission);
1062         set_to_dummy_if_null(ops, file_alloc_security);
1063         set_to_dummy_if_null(ops, file_free_security);
1064         set_to_dummy_if_null(ops, file_ioctl);
1065         set_to_dummy_if_null(ops, file_mmap);
1066         set_to_dummy_if_null(ops, file_mprotect);
1067         set_to_dummy_if_null(ops, file_lock);
1068         set_to_dummy_if_null(ops, file_fcntl);
1069         set_to_dummy_if_null(ops, file_set_fowner);
1070         set_to_dummy_if_null(ops, file_send_sigiotask);
1071         set_to_dummy_if_null(ops, file_receive);
1072         set_to_dummy_if_null(ops, dentry_open);
1073         set_to_dummy_if_null(ops, task_create);
1074         set_to_dummy_if_null(ops, task_alloc_security);
1075         set_to_dummy_if_null(ops, task_free_security);
1076         set_to_dummy_if_null(ops, task_setuid);
1077         set_to_dummy_if_null(ops, task_post_setuid);
1078         set_to_dummy_if_null(ops, task_setgid);
1079         set_to_dummy_if_null(ops, task_setpgid);
1080         set_to_dummy_if_null(ops, task_getpgid);
1081         set_to_dummy_if_null(ops, task_getsid);
1082         set_to_dummy_if_null(ops, task_getsecid);
1083         set_to_dummy_if_null(ops, task_setgroups);
1084         set_to_dummy_if_null(ops, task_setnice);
1085         set_to_dummy_if_null(ops, task_setioprio);
1086         set_to_dummy_if_null(ops, task_getioprio);
1087         set_to_dummy_if_null(ops, task_setrlimit);
1088         set_to_dummy_if_null(ops, task_setscheduler);
1089         set_to_dummy_if_null(ops, task_getscheduler);
1090         set_to_dummy_if_null(ops, task_movememory);
1091         set_to_dummy_if_null(ops, task_wait);
1092         set_to_dummy_if_null(ops, task_kill);
1093         set_to_dummy_if_null(ops, task_prctl);
1094         set_to_dummy_if_null(ops, task_reparent_to_init);
1095         set_to_dummy_if_null(ops, task_to_inode);
1096         set_to_dummy_if_null(ops, ipc_permission);
1097         set_to_dummy_if_null(ops, msg_msg_alloc_security);
1098         set_to_dummy_if_null(ops, msg_msg_free_security);
1099         set_to_dummy_if_null(ops, msg_queue_alloc_security);
1100         set_to_dummy_if_null(ops, msg_queue_free_security);
1101         set_to_dummy_if_null(ops, msg_queue_associate);
1102         set_to_dummy_if_null(ops, msg_queue_msgctl);
1103         set_to_dummy_if_null(ops, msg_queue_msgsnd);
1104         set_to_dummy_if_null(ops, msg_queue_msgrcv);
1105         set_to_dummy_if_null(ops, shm_alloc_security);
1106         set_to_dummy_if_null(ops, shm_free_security);
1107         set_to_dummy_if_null(ops, shm_associate);
1108         set_to_dummy_if_null(ops, shm_shmctl);
1109         set_to_dummy_if_null(ops, shm_shmat);
1110         set_to_dummy_if_null(ops, sem_alloc_security);
1111         set_to_dummy_if_null(ops, sem_free_security);
1112         set_to_dummy_if_null(ops, sem_associate);
1113         set_to_dummy_if_null(ops, sem_semctl);
1114         set_to_dummy_if_null(ops, sem_semop);
1115         set_to_dummy_if_null(ops, netlink_send);
1116         set_to_dummy_if_null(ops, netlink_recv);
1117         set_to_dummy_if_null(ops, register_security);
1118         set_to_dummy_if_null(ops, d_instantiate);
1119         set_to_dummy_if_null(ops, getprocattr);
1120         set_to_dummy_if_null(ops, setprocattr);
1121         set_to_dummy_if_null(ops, secid_to_secctx);
1122         set_to_dummy_if_null(ops, secctx_to_secid);
1123         set_to_dummy_if_null(ops, release_secctx);
1124 #ifdef CONFIG_SECURITY_NETWORK
1125         set_to_dummy_if_null(ops, unix_stream_connect);
1126         set_to_dummy_if_null(ops, unix_may_send);
1127         set_to_dummy_if_null(ops, socket_create);
1128         set_to_dummy_if_null(ops, socket_post_create);
1129         set_to_dummy_if_null(ops, socket_bind);
1130         set_to_dummy_if_null(ops, socket_connect);
1131         set_to_dummy_if_null(ops, socket_listen);
1132         set_to_dummy_if_null(ops, socket_accept);
1133         set_to_dummy_if_null(ops, socket_post_accept);
1134         set_to_dummy_if_null(ops, socket_sendmsg);
1135         set_to_dummy_if_null(ops, socket_recvmsg);
1136         set_to_dummy_if_null(ops, socket_getsockname);
1137         set_to_dummy_if_null(ops, socket_getpeername);
1138         set_to_dummy_if_null(ops, socket_setsockopt);
1139         set_to_dummy_if_null(ops, socket_getsockopt);
1140         set_to_dummy_if_null(ops, socket_shutdown);
1141         set_to_dummy_if_null(ops, socket_sock_rcv_skb);
1142         set_to_dummy_if_null(ops, socket_getpeersec_stream);
1143         set_to_dummy_if_null(ops, socket_getpeersec_dgram);
1144         set_to_dummy_if_null(ops, sk_alloc_security);
1145         set_to_dummy_if_null(ops, sk_free_security);
1146         set_to_dummy_if_null(ops, sk_clone_security);
1147         set_to_dummy_if_null(ops, sk_getsecid);
1148         set_to_dummy_if_null(ops, sock_graft);
1149         set_to_dummy_if_null(ops, inet_conn_request);
1150         set_to_dummy_if_null(ops, inet_csk_clone);
1151         set_to_dummy_if_null(ops, inet_conn_established);
1152         set_to_dummy_if_null(ops, req_classify_flow);
1153  #endif /* CONFIG_SECURITY_NETWORK */
1154 #ifdef  CONFIG_SECURITY_NETWORK_XFRM
1155         set_to_dummy_if_null(ops, xfrm_policy_alloc_security);
1156         set_to_dummy_if_null(ops, xfrm_policy_clone_security);
1157         set_to_dummy_if_null(ops, xfrm_policy_free_security);
1158         set_to_dummy_if_null(ops, xfrm_policy_delete_security);
1159         set_to_dummy_if_null(ops, xfrm_state_alloc_security);
1160         set_to_dummy_if_null(ops, xfrm_state_free_security);
1161         set_to_dummy_if_null(ops, xfrm_state_delete_security);
1162         set_to_dummy_if_null(ops, xfrm_policy_lookup);
1163         set_to_dummy_if_null(ops, xfrm_state_pol_flow_match);
1164         set_to_dummy_if_null(ops, xfrm_decode_session);
1165 #endif  /* CONFIG_SECURITY_NETWORK_XFRM */
1166 #ifdef CONFIG_KEYS
1167         set_to_dummy_if_null(ops, key_alloc);
1168         set_to_dummy_if_null(ops, key_free);
1169         set_to_dummy_if_null(ops, key_permission);
1170 #endif  /* CONFIG_KEYS */
1171
1172 }
1173