summaryrefslogtreecommitdiff
path: root/security/dummy.c
blob: c505122e22dbddec700ea967b604f1a01480399b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
/*
 * Stub functions for the default security function pointers in case no
 * security model is loaded.
 *
 * Copyright (C) 2001 WireX Communications, Inc <chris@wirex.com>
 * Copyright (C) 2001-2002  Greg Kroah-Hartman <greg@kroah.com>
 * Copyright (C) 2001 Networks Associates Technology, Inc <ssmalley@nai.com>
 *
 *	This program is free software; you can redistribute it and/or modify
 *	it under the terms of the GNU General Public License as published by
 *	the Free Software Foundation; either version 2 of the License, or
 *	(at your option) any later version.
 */

#undef DEBUG

#include <linux/capability.h>
#include <linux/kernel.h>
#include <linux/mman.h>
#include <linux/pagemap.h>
#include <linux/swap.h>
#include <linux/security.h>
#include <linux/skbuff.h>
#include <linux/netlink.h>
#include <net/sock.h>
#include <linux/xattr.h>
#include <linux/hugetlb.h>
#include <linux/ptrace.h>
#include <linux/file.h>

static int dummy_ptrace (struct task_struct *parent, struct task_struct *child)
{
	return 0;
}

static int dummy_capget (struct task_struct *target, kernel_cap_t * effective,
			 kernel_cap_t * inheritable, kernel_cap_t * permitted)
{
	*effective = *inheritable = *permitted = 0;
	if (target->euid == 0) {
		*permitted |= (~0 & ~CAP_FS_MASK);
		*effective |= (~0 & ~CAP_TO_MASK(CAP_SETPCAP) & ~CAP_FS_MASK);
	}
	if (target->fsuid == 0) {
		*permitted |= CAP_FS_MASK;
		*effective |= CAP_FS_MASK;
	}
	return 0;
}

static int dummy_capset_check (struct task_struct *target,
			       kernel_cap_t * effective,
			       kernel_cap_t * inheritable,
			       kernel_cap_t * permitted)
{
	return -EPERM;
}

static void dummy_capset_set (struct task_struct *target,
			      kernel_cap_t * effective,
			      kernel_cap_t * inheritable,
			      kernel_cap_t * permitted)
{
	return;
}

static int dummy_acct (struct file *file)
{
	return 0;
}

static int dummy_capable (struct task_struct *tsk, int cap)
{
	if (cap_raised (tsk->cap_effective, cap))
		return 0;
	return -EPERM;
}

static int dummy_sysctl (ctl_table * table, int op)
{
	return 0;
}

static int dummy_quotactl (int cmds, int type, int id, struct super_block *sb)
{
	return 0;
}

static int dummy_quota_on (struct dentry *dentry)
{
	return 0;
}

static int dummy_syslog (int type)
{
	if ((type != 3 && type != 10) && current->euid)
		return -EPERM;
	return 0;
}

static int dummy_settime(struct timespec *ts, struct timezone *tz)
{
	if (!capable(CAP_SYS_TIME))
		return -EPERM;
	return 0;
}

static int dummy_vm_enough_memory(struct mm_struct *mm, long pages)
{
	int cap_sys_admin = 0;

	if (dummy_capable(current, CAP_SYS_ADMIN) == 0)
		cap_sys_admin = 1;
	return __vm_enough_memory(mm, pages, cap_sys_admin);
}

static int dummy_bprm_alloc_security (struct linux_binprm *bprm)
{
	return 0;
}

static void dummy_bprm_free_security (struct linux_binprm *bprm)
{
	return;
}

static void dummy_bprm_apply_creds (struct linux_binprm *bprm, int unsafe)
{
	if (bprm->e_uid != current->uid || bprm->e_gid != current->gid) {
		set_dumpable(current->mm, suid_dumpable);

		if ((unsafe & ~LSM_UNSAFE_PTRACE_CAP) && !capable(CAP_SETUID)) {
			bprm->e_uid = current->uid;
			bprm->e_gid = current->gid;
		}
	}

	current->suid = current->euid = current->fsuid = bprm->e_uid;
	current->sgid = current->egid = current->fsgid = bprm->e_gid;

	dummy_capget(current, &current->cap_effective, &current->cap_inheritable, &current->cap_permitted);
}

static void dummy_bprm_post_apply_creds (struct linux_binprm *bprm)
{
	return;
}

static int dummy_bprm_set_security (struct linux_binprm *bprm)
{
	return 0;
}

static int dummy_bprm_check_security (struct linux_binprm *bprm)
{
	return 0;
}

static int dummy_bprm_secureexec (struct linux_binprm *bprm)
{
	/* The new userland will simply use the value provided
	   in the AT_SECURE field to decide whether secure mode
	   is required.  Hence, this logic is required to preserve
	   the legacy decision algorithm used by the old userland. */
	return (current->euid != current->uid ||
		current->egid != current->gid);
}

static int dummy_sb_alloc_security (struct super_block *sb)
{
	return 0;
}

static void dummy_sb_free_security (struct super_block *sb)
{
	return;
}

static int dummy_sb_copy_data (struct file_system_type *type,
			       void *orig, void *copy)
{
	return 0;
}

static int dummy_sb_kern_mount (struct super_block *sb, void *data)
{
	return 0;
}

static int dummy_sb_statfs (struct dentry *dentry)
{
	return 0;
}

static int dummy_sb_mount (char *dev_name, struct nameidata *nd, char *type,
			   unsigned long flags, void *data)
{
	return 0;
}

static int dummy_sb_check_sb (struct vfsmount *mnt, struct nameidata *nd)
{
	return 0;
}

static int dummy_sb_umount (struct vfsmount *mnt, int flags)
{
	return 0;
}

static void dummy_sb_umount_close (struct vfsmount *mnt)
{
	return;
}

static void dummy_sb_umount_busy (struct vfsmount *mnt)
{
	return;
}

static void dummy_sb_post_remount (struct vfsmount *mnt, unsigned long flags,
				   void *data)
{
	return;
}


static void dummy_sb_post_addmount (struct vfsmount *mnt, struct nameidata *nd)
{
	return;
}

static int dummy_sb_pivotroot (struct nameidata *old_nd, struct nameidata *new_nd)
{
	return 0;
}

static void dummy_sb_post_pivotroot (struct nameidata *old_nd, struct nameidata *new_nd)
{
	return;
}

static int dummy_sb_get_mnt_opts(const struct super_block *sb, char ***mount_options,
				 int **flags, int *num_opts)
{
	*mount_options = NULL;
	*flags = NULL;
	*num_opts = 0;
	return 0;
}

static int dummy_sb_set_mnt_opts(struct super_block *sb, char **mount_options,
				 int *flags, int num_opts)
{
	if (unlikely(num_opts))
		return -EOPNOTSUPP;
	return 0;
}

static void dummy_sb_clone_mnt_opts(const struct super_block *oldsb,
				    struct super_block *newsb)
{
	return;
}

static int dummy_inode_alloc_security (struct inode *inode)
{
	return 0;
}

static void dummy_inode_free_security (struct inode *inode)
{
	return;
}

static int dummy_inode_init_security (struct inode *inode, struct inode *dir,
				      char **name, void **value, size_t *len)
{
	return -EOPNOTSUPP;
}

static int dummy_inode_create (struct inode *inode, struct dentry *dentry,
			       int mask)
{
	return 0;
}

static int dummy_inode_link (struct dentry *old_dentry, struct inode *inode,
			     struct dentry *new_dentry)
{
	return 0;
}

static int dummy_inode_unlink (struct inode *inode, struct dentry *dentry)
{
	return 0;
}

static int dummy_inode_symlink (struct inode *inode, struct dentry *dentry,
				const char *name)
{
	return 0;
}

static int dummy_inode_mkdir (struct inode *inode, struct dentry *dentry,
			      int mask)
{
	return 0;
}

static int dummy_inode_rmdir (struct inode *inode, struct dentry *dentry)
{
	return 0;
}

static int dummy_inode_mknod (struct inode *inode, struct dentry *dentry,
			      int mode, dev_t dev)
{
	return 0;
}

static int dummy_inode_rename (struct inode *old_inode,
			       struct dentry *old_dentry,
			       struct inode *new_inode,
			       struct dentry *new_dentry)
{
	return 0;
}

static int dummy_inode_readlink (struct dentry *dentry)
{
	return 0;
}

static int dummy_inode_follow_link (struct dentry *dentry,
				    struct nameidata *nameidata)
{
	return 0;
}

static int dummy_inode_permission (struct inode *inode, int mask, struct nameidata *nd)
{
	return 0;
}

static int dummy_inode_setattr (struct dentry *dentry, struct iattr *iattr)
{
	return 0;
}

static int dummy_inode_getattr (struct vfsmount *mnt, struct dentry *dentry)
{
	return 0;
}

static void dummy_inode_delete (struct inode *ino)
{
	return;
}

static int dummy_inode_setxattr (struct dentry *dentry, char *name, void *value,
				size_t size, int flags)
{
	if (!strncmp(name, XATTR_SECURITY_PREFIX,
		     sizeof(XATTR_SECURITY_PREFIX) - 1) &&
	    !capable(CAP_SYS_ADMIN))
		return -EPERM;
	return 0;
}

static void dummy_inode_post_setxattr (struct dentry *dentry, char *name, void *value,
				       size_t size, int flags)
{
}

static int dummy_inode_getxattr (struct dentry *dentry, char *name)
{
	return 0;
}

static int dummy_inode_listxattr (struct dentry *dentry)
{
	return 0;
}

static int dummy_inode_removexattr (struct dentry *dentry, char *name)
{
	if (!strncmp(name, XATTR_SECURITY_PREFIX,
		     sizeof(XATTR_SECURITY_PREFIX) - 1) &&
	    !capable(CAP_SYS_ADMIN))
		return -EPERM;
	return 0;
}

static int dummy_inode_need_killpriv(struct dentry *dentry)
{
	return 0;
}

static int dummy_inode_killpriv(struct dentry *dentry)
{
	return 0;
}

static int dummy_inode_getsecurity(const struct inode *inode, const char *name, void **buffer, bool alloc)
{
	return -EOPNOTSUPP;
}

static int dummy_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags)
{
	return -EOPNOTSUPP;
}

static int dummy_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
{
	return 0;
}

static int dummy_file_permission (struct file *file, int mask)
{
	return 0;
}

static int dummy_file_alloc_security (struct file *file)
{
	return 0;
}

static void dummy_file_free_security (struct file *file)
{
	return;
}

static int dummy_file_ioctl (struct file *file, unsigned int command,
			     unsigned long arg)
{
	return 0;
}

static int dummy_file_mmap (struct file *file, unsigned long reqprot,
			    unsigned long prot,
			    unsigned long flags,
			    unsigned long addr,
			    unsigned long addr_only)
{
	if ((addr < mmap_min_addr) && !capable(CAP_SYS_RAWIO))
		return -EACCES;
	return 0;
}

static int dummy_file_mprotect (struct vm_area_struct *vma,
				unsigned long reqprot,
				unsigned long prot)
{
	return 0;
}

static int dummy_file_lock (struct file *file, unsigned int cmd)
{
	return 0;
}

static int dummy_file_fcntl (struct file *file, unsigned int cmd,
			     unsigned long arg)
{
	return 0;
}

static int dummy_file_set_fowner (struct file *file)
{
	return 0;
}

static int dummy_file_send_sigiotask (struct task_struct *tsk,
				      struct fown_struct *fown, int sig)
{
	return 0;
}

static int dummy_file_receive (struct file *file)
{
	return 0;
}

static int dummy_dentry_open (struct file *file)
{
	return 0;
}

static int dummy_task_create (unsigned long clone_flags)
{
	return 0;
}

static int dummy_task_alloc_security (struct task_struct *p)
{
	return 0;
}

static void dummy_task_free_security (struct task_struct *p)
{
	return;
}

static int dummy_task_setuid (uid_t id0, uid_t id1, uid_t id2, int flags)
{
	return 0;
}

static int dummy_task_post_setuid (uid_t id0, uid_t id1, uid_t id2, int flags)
{
	dummy_capget(current, &current->cap_effective, &current->cap_inheritable, &current->cap_permitted);
	return 0;
}

static int dummy_task_setgid (gid_t id0, gid_t id1, gid_t id2, int flags)
{
	return 0;
}

static int dummy_task_setpgid (struct task_struct *p, pid_t pgid)
{
	return 0;
}

static int dummy_task_getpgid (struct task_struct *p)
{
	return 0;
}

static int dummy_task_getsid (struct task_struct *p)
{
	return 0;
}

static void dummy_task_getsecid (struct task_struct *p, u32 *secid)
{ }

static int dummy_task_setgroups (struct group_info *group_info)
{
	return 0;
}

static int dummy_task_setnice (struct task_struct *p, int nice)
{
	return 0;
}

static int dummy_task_setioprio (struct task_struct *p, int ioprio)
{
	return 0;
}

static int dummy_task_getioprio (struct task_struct *p)
{
	return 0;
}

static int dummy_task_setrlimit (unsigned int resource, struct rlimit *new_rlim)
{
	return 0;
}

static int dummy_task_setscheduler (struct task_struct *p, int policy,
				    struct sched_param *lp)
{
	return 0;
}

static int dummy_task_getscheduler (struct task_struct *p)
{
	return 0;
}

static int dummy_task_movememory (struct task_struct *p)
{
	return 0;
}

static int dummy_task_wait (struct task_struct *p)
{
	return 0;
}

static int dummy_task_kill (struct task_struct *p, struct siginfo *info,
			    int sig, u32 secid)
{
	return 0;
}

static int dummy_task_prctl (int option, unsigned long arg2, unsigned long arg3,
			     unsigned long arg4, unsigned long arg5)
{
	return 0;
}

static void dummy_task_reparent_to_init (struct task_struct *p)
{
	p->euid = p->fsuid = 0;
	return;
}

static void dummy_task_to_inode(struct task_struct *p, struct inode *inode)
{ }

static int dummy_ipc_permission (struct kern_ipc_perm *ipcp, short flag)
{
	return 0;
}

static int dummy_msg_msg_alloc_security (struct msg_msg *msg)
{
	return 0;
}

static void dummy_msg_msg_free_security (struct msg_msg *msg)
{
	return;
}

static int dummy_msg_queue_alloc_security (struct msg_queue *msq)
{
	return 0;
}

static void dummy_msg_queue_free_security (struct msg_queue *msq)
{
	return;
}

static int dummy_msg_queue_associate (struct msg_queue *msq, 
				      int msqflg)
{
	return 0;
}

static int dummy_msg_queue_msgctl (struct msg_queue *msq, int cmd)
{
	return 0;
}

static int dummy_msg_queue_msgsnd (struct msg_queue *msq, struct msg_msg *msg,
				   int msgflg)
{
	return 0;
}

static int dummy_msg_queue_msgrcv (struct msg_queue *msq, struct msg_msg *msg,
				   struct task_struct *target, long type,
				   int mode)
{
	return 0;
}

static int dummy_shm_alloc_security (struct shmid_kernel *shp)
{
	return 0;
}

static void dummy_shm_free_security (struct shmid_kernel *shp)
{
	return;
}

static int dummy_shm_associate (struct shmid_kernel *shp, int shmflg)
{
	return 0;
}

static int dummy_shm_shmctl (struct shmid_kernel *shp, int cmd)
{
	return 0;
}

static int dummy_shm_shmat (struct shmid_kernel *shp, char __user *shmaddr,
			    int shmflg)
{
	return 0;
}

static int dummy_sem_alloc_security (struct sem_array *sma)
{
	return 0;
}

static void dummy_sem_free_security (struct sem_array *sma)
{
	return;
}

static int dummy_sem_associate (struct sem_array *sma, int semflg)
{
	return 0;
}

static int dummy_sem_semctl (struct sem_array *sma, int cmd)
{
	return 0;
}

static int dummy_sem_semop (struct sem_array *sma, 
			    struct sembuf *sops, unsigned nsops, int alter)
{
	return 0;
}

static int dummy_netlink_send (struct sock *sk, struct sk_buff *skb)
{
	NETLINK_CB(skb).eff_cap = current->cap_effective;
	return 0;
}

static int dummy_netlink_recv (struct sk_buff *skb, int cap)
{
	if (!cap_raised (NETLINK_CB (skb).eff_cap, cap))
		return -EPERM;
	return 0;
}

#ifdef CONFIG_SECURITY_NETWORK
static int dummy_unix_stream_connect (struct socket *sock,
				      struct socket *other,
				      struct sock *newsk)
{
	return 0;
}

static int dummy_unix_may_send (struct socket *sock,
				struct socket *other)
{
	return 0;
}

static int dummy_socket_create (int family, int type,
				int protocol, int kern)
{
	return 0;
}

static int dummy_socket_post_create (struct socket *sock, int family, int type,
				     int protocol, int kern)
{
	return 0;
}

static int dummy_socket_bind (struct socket *sock, struct sockaddr *address,
			      int addrlen)
{
	return 0;
}

static int dummy_socket_connect (struct socket *sock, struct sockaddr *address,
				 int addrlen)
{
	return 0;
}

static int dummy_socket_listen (struct socket *sock, int backlog)
{
	return 0;
}

static int dummy_socket_accept (struct socket *sock, struct socket *newsock)
{
	return 0;
}

static void dummy_socket_post_accept (struct socket *sock, 
				      struct socket *newsock)
{
	return;
}

static int dummy_socket_sendmsg (struct socket *sock, struct msghdr *msg,
				 int size)
{
	return 0;
}

static int dummy_socket_recvmsg (struct socket *sock, struct msghdr *msg,
				 int size, int flags)
{
	return 0;
}

static int dummy_socket_getsockname (struct socket *sock)
{
	return 0;
}

static int dummy_socket_getpeername (struct socket *sock)
{
	return 0;
}

static int dummy_socket_setsockopt (struct socket *sock, int level, int optname)
{
	return 0;
}

static int dummy_socket_getsockopt (struct socket *sock, int level, int optname)
{
	return 0;
}

static int dummy_socket_shutdown (struct socket *sock, int how)
{
	return 0;
}

static int dummy_socket_sock_rcv_skb (struct sock *sk, struct sk_buff *skb)
{
	return 0;
}

static int dummy_socket_getpeersec_stream(struct socket *sock, char __user *optval,
					  int __user *optlen, unsigned len)
{
	return -ENOPROTOOPT;
}

static int dummy_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid)
{
	return -ENOPROTOOPT;
}

static inline int dummy_sk_alloc_security (struct sock *sk, int family, gfp_t priority)
{
	return 0;
}

static inline void dummy_sk_free_security (struct sock *sk)
{
}

static inline void dummy_sk_clone_security (const struct sock *sk, struct sock *newsk)
{
}

static inline void dummy_sk_getsecid(struct sock *sk, u32 *secid)
{
}

static inline void dummy_sock_graft(struct sock* sk, struct socket *parent)
{
}

static inline int dummy_inet_conn_request(struct sock *sk,
			struct sk_buff *skb, struct request_sock *req)
{
	return 0;
}

static inline void dummy_inet_csk_clone(struct sock *newsk,
			const struct request_sock *req)
{
}

static inline void dummy_inet_conn_established(struct sock *sk,
			struct sk_buff *skb)
{
}

static inline void dummy_req_classify_flow(const struct request_sock *req,
			struct flowi *fl)
{
}
#endif	/* CONFIG_SECURITY_NETWORK */

#ifdef CONFIG_SECURITY_NETWORK_XFRM
static int dummy_xfrm_policy_alloc_security(struct xfrm_policy *xp,
		struct xfrm_user_sec_ctx *sec_ctx)
{
	return 0;
}

static inline int dummy_xfrm_policy_clone_security(struct xfrm_policy *old, struct xfrm_policy *new)
{
	return 0;
}

static void dummy_xfrm_policy_free_security(struct xfrm_policy *xp)
{
}

static int dummy_xfrm_policy_delete_security(struct xfrm_policy *xp)
{
	return 0;
}

static int dummy_xfrm_state_alloc_security(struct xfrm_state *x,
	struct xfrm_user_sec_ctx *sec_ctx, u32 secid)
{
	return 0;
}

static void dummy_xfrm_state_free_security(struct xfrm_state *x)
{
}

static int dummy_xfrm_state_delete_security(struct xfrm_state *x)
{
	return 0;
}

static int dummy_xfrm_policy_lookup(struct xfrm_policy *xp, u32 sk_sid, u8 dir)
{
	return 0;
}

static int dummy_xfrm_state_pol_flow_match(struct xfrm_state *x,
				struct xfrm_policy *xp, struct flowi *fl)
{
	return 1;
}

static int dummy_xfrm_decode_session(struct sk_buff *skb, u32 *fl, int ckall)
{
	return 0;
}

#endif /* CONFIG_SECURITY_NETWORK_XFRM */
static int dummy_register_security (const char *name, struct security_operations *ops)
{
	return -EINVAL;
}

static void dummy_d_instantiate (struct dentry *dentry, struct inode *inode)
{
	return;
}

static int dummy_getprocattr(struct task_struct *p, char *name, char **value)
{
	return -EINVAL;
}

static int dummy_setprocattr(struct task_struct *p, char *name, void *value, size_t size)
{
	return -EINVAL;
}

static int dummy_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
{
	return -EOPNOTSUPP;
}

static int dummy_secctx_to_secid(char *secdata, u32 seclen, u32 *secid)
{
	return -EOPNOTSUPP;
}

static void dummy_release_secctx(char *secdata, u32 seclen)
{
}

#ifdef CONFIG_KEYS
static inline int dummy_key_alloc(struct key *key, struct task_struct *ctx,
				  unsigned long flags)
{
	return 0;
}

static inline void dummy_key_free(struct key *key)
{
}

static inline int dummy_key_permission(key_ref_t key_ref,
				       struct task_struct *context,
				       key_perm_t perm)
{
	return 0;
}
#endif /* CONFIG_KEYS */

struct security_operations dummy_security_ops;

#define set_to_dummy_if_null(ops, function)				\
	do {								\
		if (!ops->function) {					\
			ops->function = dummy_##function;		\
			pr_debug("Had to override the " #function	\
				 " security operation with the dummy one.\n");\
			}						\
	} while (0)

void security_fixup_ops (struct security_operations *ops)
{
	set_to_dummy_if_null(ops, ptrace);
	set_to_dummy_if_null(ops, capget);
	set_to_dummy_if_null(ops, capset_check);
	set_to_dummy_if_null(ops, capset_set);
	set_to_dummy_if_null(ops, acct);
	set_to_dummy_if_null(ops, capable);
	set_to_dummy_if_null(ops, quotactl);
	set_to_dummy_if_null(ops, quota_on);
	set_to_dummy_if_null(ops, sysctl);
	set_to_dummy_if_null(ops, syslog);
	set_to_dummy_if_null(ops, settime);
	set_to_dummy_if_null(ops, vm_enough_memory);
	set_to_dummy_if_null(ops, bprm_alloc_security);
	set_to_dummy_if_null(ops, bprm_free_security);
	set_to_dummy_if_null(ops, bprm_apply_creds);
	set_to_dummy_if_null(ops, bprm_post_apply_creds);
	set_to_dummy_if_null(ops, bprm_set_security);
	set_to_dummy_if_null(ops, bprm_check_security);
	set_to_dummy_if_null(ops, bprm_secureexec);
	set_to_dummy_if_null(ops, sb_alloc_security);
	set_to_dummy_if_null(ops, sb_free_security);
	set_to_dummy_if_null(ops, sb_copy_data);
	set_to_dummy_if_null(ops, sb_kern_mount);
	set_to_dummy_if_null(ops, sb_statfs);
	set_to_dummy_if_null(ops, sb_mount);
	set_to_dummy_if_null(ops, sb_check_sb);
	set_to_dummy_if_null(ops, sb_umount);
	set_to_dummy_if_null(ops, sb_umount_close);
	set_to_dummy_if_null(ops, sb_umount_busy);
	set_to_dummy_if_null(ops, sb_post_remount);
	set_to_dummy_if_null(ops, sb_post_addmount);
	set_to_dummy_if_null(ops, sb_pivotroot);
	set_to_dummy_if_null(ops, sb_post_pivotroot);
	set_to_dummy_if_null(ops, sb_get_mnt_opts);
	set_to_dummy_if_null(ops, sb_set_mnt_opts);
	set_to_dummy_if_null(ops, sb_clone_mnt_opts);
	set_to_dummy_if_null(ops, inode_alloc_security);
	set_to_dummy_if_null(ops, inode_free_security);
	set_to_dummy_if_null(ops, inode_init_security);
	set_to_dummy_if_null(ops, inode_create);
	set_to_dummy_if_null(ops, inode_link);
	set_to_dummy_if_null(ops, inode_unlink);
	set_to_dummy_if_null(ops, inode_symlink);
	set_to_dummy_if_null(ops, inode_mkdir);
	set_to_dummy_if_null(ops, inode_rmdir);
	set_to_dummy_if_null(ops, inode_mknod);
	set_to_dummy_if_null(ops, inode_rename);
	set_to_dummy_if_null(ops, inode_readlink);
	set_to_dummy_if_null(ops, inode_follow_link);
	set_to_dummy_if_null(ops, inode_permission);
	set_to_dummy_if_null(ops, inode_setattr);
	set_to_dummy_if_null(ops, inode_getattr);
	set_to_dummy_if_null(ops, inode_delete);
	set_to_dummy_if_null(ops, inode_setxattr);
	set_to_dummy_if_null(ops, inode_post_setxattr);
	set_to_dummy_if_null(ops, inode_getxattr);
	set_to_dummy_if_null(ops, inode_listxattr);
	set_to_dummy_if_null(ops, inode_removexattr);
	set_to_dummy_if_null(ops, inode_need_killpriv);
	set_to_dummy_if_null(ops, inode_killpriv);
	set_to_dummy_if_null(ops, inode_getsecurity);
	set_to_dummy_if_null(ops, inode_setsecurity);
	set_to_dummy_if_null(ops, inode_listsecurity);
	set_to_dummy_if_null(ops, file_permission);
	set_to_dummy_if_null(ops, file_alloc_security);
	set_to_dummy_if_null(ops, file_free_security);
	set_to_dummy_if_null(ops, file_ioctl);
	set_to_dummy_if_null(ops, file_mmap);
	set_to_dummy_if_null(ops, file_mprotect);
	set_to_dummy_if_null(ops, file_lock);
	set_to_dummy_if_null(ops, file_fcntl);
	set_to_dummy_if_null(ops, file_set_fowner);
	set_to_dummy_if_null(ops, file_send_sigiotask);
	set_to_dummy_if_null(ops, file_receive);
	set_to_dummy_if_null(ops, dentry_open);
	set_to_dummy_if_null(ops, task_create);
	set_to_dummy_if_null(ops, task_alloc_security);
	set_to_dummy_if_null(ops, task_free_security);
	set_to_dummy_if_null(ops, task_setuid);
	set_to_dummy_if_null(ops, task_post_setuid);
	set_to_dummy_if_null(ops, task_setgid);
	set_to_dummy_if_null(ops, task_setpgid);
	set_to_dummy_if_null(ops, task_getpgid);
	set_to_dummy_if_null(ops, task_getsid);
	set_to_dummy_if_null(ops, task_getsecid);
	set_to_dummy_if_null(ops, task_setgroups);
	set_to_dummy_if_null(ops, task_setnice);
	set_to_dummy_if_null(ops, task_setioprio);
	set_to_dummy_if_null(ops, task_getioprio);
	set_to_dummy_if_null(ops, task_setrlimit);
	set_to_dummy_if_null(ops, task_setscheduler);
	set_to_dummy_if_null(ops, task_getscheduler);
	set_to_dummy_if_null(ops, task_movememory);
	set_to_dummy_if_null(ops, task_wait);
	set_to_dummy_if_null(ops, task_kill);
	set_to_dummy_if_null(ops, task_prctl);
	set_to_dummy_if_null(ops, task_reparent_to_init);
 	set_to_dummy_if_null(ops, task_to_inode);
	set_to_dummy_if_null(ops, ipc_permission);
	set_to_dummy_if_null(ops, msg_msg_alloc_security);
	set_to_dummy_if_null(ops, msg_msg_free_security);
	set_to_dummy_if_null(ops, msg_queue_alloc_security);
	set_to_dummy_if_null(ops, msg_queue_free_security);
	set_to_dummy_if_null(ops, msg_queue_associate);
	set_to_dummy_if_null(ops, msg_queue_msgctl);
	set_to_dummy_if_null(ops, msg_queue_msgsnd);
	set_to_dummy_if_null(ops, msg_queue_msgrcv);
	set_to_dummy_if_null(ops, shm_alloc_security);
	set_to_dummy_if_null(ops, shm_free_security);
	set_to_dummy_if_null(ops, shm_associate);
	set_to_dummy_if_null(ops, shm_shmctl);
	set_to_dummy_if_null(ops, shm_shmat);
	set_to_dummy_if_null(ops, sem_alloc_security);
	set_to_dummy_if_null(ops, sem_free_security);
	set_to_dummy_if_null(ops, sem_associate);
	set_to_dummy_if_null(ops, sem_semctl);
	set_to_dummy_if_null(ops, sem_semop);
	set_to_dummy_if_null(ops, netlink_send);
	set_to_dummy_if_null(ops, netlink_recv);
	set_to_dummy_if_null(ops, register_security);
	set_to_dummy_if_null(ops, d_instantiate);
 	set_to_dummy_if_null(ops, getprocattr);
 	set_to_dummy_if_null(ops, setprocattr);
 	set_to_dummy_if_null(ops, secid_to_secctx);
	set_to_dummy_if_null(ops, secctx_to_secid);
 	set_to_dummy_if_null(ops, release_secctx);
#ifdef CONFIG_SECURITY_NETWORK
	set_to_dummy_if_null(ops, unix_stream_connect);
	set_to_dummy_if_null(ops, unix_may_send);
	set_to_dummy_if_null(ops, socket_create);
	set_to_dummy_if_null(ops, socket_post_create);
	set_to_dummy_if_null(ops, socket_bind);
	set_to_dummy_if_null(ops, socket_connect);
	set_to_dummy_if_null(ops, socket_listen);
	set_to_dummy_if_null(ops, socket_accept);
	set_to_dummy_if_null(ops, socket_post_accept);
	set_to_dummy_if_null(ops, socket_sendmsg);
	set_to_dummy_if_null(ops, socket_recvmsg);
	set_to_dummy_if_null(ops, socket_getsockname);
	set_to_dummy_if_null(ops, socket_getpeername);
	set_to_dummy_if_null(ops, socket_setsockopt);
	set_to_dummy_if_null(ops, socket_getsockopt);
	set_to_dummy_if_null(ops, socket_shutdown);
	set_to_dummy_if_null(ops, socket_sock_rcv_skb);
	set_to_dummy_if_null(ops, socket_getpeersec_stream);
	set_to_dummy_if_null(ops, socket_getpeersec_dgram);
	set_to_dummy_if_null(ops, sk_alloc_security);
	set_to_dummy_if_null(ops, sk_free_security);
	set_to_dummy_if_null(ops, sk_clone_security);
	set_to_dummy_if_null(ops, sk_getsecid);
	set_to_dummy_if_null(ops, sock_graft);
	set_to_dummy_if_null(ops, inet_conn_request);
	set_to_dummy_if_null(ops, inet_csk_clone);
	set_to_dummy_if_null(ops, inet_conn_established);
	set_to_dummy_if_null(ops, req_classify_flow);
 #endif	/* CONFIG_SECURITY_NETWORK */
#ifdef  CONFIG_SECURITY_NETWORK_XFRM
	set_to_dummy_if_null(ops, xfrm_policy_alloc_security);
	set_to_dummy_if_null(ops, xfrm_policy_clone_security);
	set_to_dummy_if_null(ops, xfrm_policy_free_security);
	set_to_dummy_if_null(ops, xfrm_policy_delete_security);
	set_to_dummy_if_null(ops, xfrm_state_alloc_security);
	set_to_dummy_if_null(ops, xfrm_state_free_security);
	set_to_dummy_if_null(ops, xfrm_state_delete_security);
	set_to_dummy_if_null(ops, xfrm_policy_lookup);
	set_to_dummy_if_null(ops, xfrm_state_pol_flow_match);
	set_to_dummy_if_null(ops, xfrm_decode_session);
#endif	/* CONFIG_SECURITY_NETWORK_XFRM */
#ifdef CONFIG_KEYS
	set_to_dummy_if_null(ops, key_alloc);
	set_to_dummy_if_null(ops, key_free);
	set_to_dummy_if_null(ops, key_permission);
#endif	/* CONFIG_KEYS */

}