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20#include <linux/xattr.h>
21#include <linux/pagemap.h>
22#include <linux/mount.h>
23#include <linux/stat.h>
24#include <linux/kd.h>
25#include <asm/ioctls.h>
26#include <linux/ip.h>
27#include <linux/tcp.h>
28#include <linux/udp.h>
29#include <linux/slab.h>
30#include <linux/mutex.h>
31#include <linux/pipe_fs_i.h>
32#include <net/netlabel.h>
33#include <net/cipso_ipv4.h>
34#include <linux/audit.h>
35#include <linux/magic.h>
36#include "smack.h"
37
38#define task_security(task) (task_cred_xxx((task), security))
39
40#define TRANS_TRUE "TRUE"
41#define TRANS_TRUE_SIZE 4
42
43
44
45
46
47
48
49
50
51static char *smk_fetch(const char *name, struct inode *ip, struct dentry *dp)
52{
53 int rc;
54 char in[SMK_LABELLEN];
55
56 if (ip->i_op->getxattr == NULL)
57 return NULL;
58
59 rc = ip->i_op->getxattr(dp, name, in, SMK_LABELLEN);
60 if (rc < 0)
61 return NULL;
62
63 return smk_import(in, rc);
64}
65
66
67
68
69
70
71
72struct inode_smack *new_inode_smack(char *smack)
73{
74 struct inode_smack *isp;
75
76 isp = kzalloc(sizeof(struct inode_smack), GFP_KERNEL);
77 if (isp == NULL)
78 return NULL;
79
80 isp->smk_inode = smack;
81 isp->smk_flags = 0;
82 mutex_init(&isp->smk_lock);
83
84 return isp;
85}
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101static int smack_ptrace_access_check(struct task_struct *ctp, unsigned int mode)
102{
103 int rc;
104 struct smk_audit_info ad;
105 char *sp, *tsp;
106
107 rc = cap_ptrace_access_check(ctp, mode);
108 if (rc != 0)
109 return rc;
110
111 sp = smk_of_current();
112 tsp = smk_of_task(task_security(ctp));
113 smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_TASK);
114 smk_ad_setfield_u_tsk(&ad, ctp);
115
116
117 rc = smk_access(sp, tsp, MAY_READWRITE, NULL);
118 if (rc != 0 && capable(CAP_MAC_OVERRIDE))
119 rc = 0;
120
121 smack_log(sp, tsp, MAY_READWRITE, rc, &ad);
122 return rc;
123}
124
125
126
127
128
129
130
131
132
133static int smack_ptrace_traceme(struct task_struct *ptp)
134{
135 int rc;
136 struct smk_audit_info ad;
137 char *sp, *tsp;
138
139 rc = cap_ptrace_traceme(ptp);
140 if (rc != 0)
141 return rc;
142
143 smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_TASK);
144 smk_ad_setfield_u_tsk(&ad, ptp);
145
146 sp = smk_of_current();
147 tsp = smk_of_task(task_security(ptp));
148
149 rc = smk_access(tsp, sp, MAY_READWRITE, NULL);
150 if (rc != 0 && has_capability(ptp, CAP_MAC_OVERRIDE))
151 rc = 0;
152
153 smack_log(tsp, sp, MAY_READWRITE, rc, &ad);
154 return rc;
155}
156
157
158
159
160
161
162
163
164
165static int smack_syslog(int typefrom_file)
166{
167 int rc = 0;
168 char *sp = smk_of_current();
169
170 if (capable(CAP_MAC_OVERRIDE))
171 return 0;
172
173 if (sp != smack_known_floor.smk_known)
174 rc = -EACCES;
175
176 return rc;
177}
178
179
180
181
182
183
184
185
186
187
188
189
190static int smack_sb_alloc_security(struct super_block *sb)
191{
192 struct superblock_smack *sbsp;
193
194 sbsp = kzalloc(sizeof(struct superblock_smack), GFP_KERNEL);
195
196 if (sbsp == NULL)
197 return -ENOMEM;
198
199 sbsp->smk_root = smack_known_floor.smk_known;
200 sbsp->smk_default = smack_known_floor.smk_known;
201 sbsp->smk_floor = smack_known_floor.smk_known;
202 sbsp->smk_hat = smack_known_hat.smk_known;
203 sbsp->smk_initialized = 0;
204 spin_lock_init(&sbsp->smk_sblock);
205
206 sb->s_security = sbsp;
207
208 return 0;
209}
210
211
212
213
214
215
216static void smack_sb_free_security(struct super_block *sb)
217{
218 kfree(sb->s_security);
219 sb->s_security = NULL;
220}
221
222
223
224
225
226
227
228
229
230
231
232static int smack_sb_copy_data(char *orig, char *smackopts)
233{
234 char *cp, *commap, *otheropts, *dp;
235
236 otheropts = (char *)get_zeroed_page(GFP_KERNEL);
237 if (otheropts == NULL)
238 return -ENOMEM;
239
240 for (cp = orig, commap = orig; commap != NULL; cp = commap + 1) {
241 if (strstr(cp, SMK_FSDEFAULT) == cp)
242 dp = smackopts;
243 else if (strstr(cp, SMK_FSFLOOR) == cp)
244 dp = smackopts;
245 else if (strstr(cp, SMK_FSHAT) == cp)
246 dp = smackopts;
247 else if (strstr(cp, SMK_FSROOT) == cp)
248 dp = smackopts;
249 else
250 dp = otheropts;
251
252 commap = strchr(cp, ',');
253 if (commap != NULL)
254 *commap = '\0';
255
256 if (*dp != '\0')
257 strcat(dp, ",");
258 strcat(dp, cp);
259 }
260
261 strcpy(orig, otheropts);
262 free_page((unsigned long)otheropts);
263
264 return 0;
265}
266
267
268
269
270
271
272
273
274
275static int smack_sb_kern_mount(struct super_block *sb, int flags, void *data)
276{
277 struct dentry *root = sb->s_root;
278 struct inode *inode = root->d_inode;
279 struct superblock_smack *sp = sb->s_security;
280 struct inode_smack *isp;
281 char *op;
282 char *commap;
283 char *nsp;
284
285 spin_lock(&sp->smk_sblock);
286 if (sp->smk_initialized != 0) {
287 spin_unlock(&sp->smk_sblock);
288 return 0;
289 }
290 sp->smk_initialized = 1;
291 spin_unlock(&sp->smk_sblock);
292
293 for (op = data; op != NULL; op = commap) {
294 commap = strchr(op, ',');
295 if (commap != NULL)
296 *commap++ = '\0';
297
298 if (strncmp(op, SMK_FSHAT, strlen(SMK_FSHAT)) == 0) {
299 op += strlen(SMK_FSHAT);
300 nsp = smk_import(op, 0);
301 if (nsp != NULL)
302 sp->smk_hat = nsp;
303 } else if (strncmp(op, SMK_FSFLOOR, strlen(SMK_FSFLOOR)) == 0) {
304 op += strlen(SMK_FSFLOOR);
305 nsp = smk_import(op, 0);
306 if (nsp != NULL)
307 sp->smk_floor = nsp;
308 } else if (strncmp(op, SMK_FSDEFAULT,
309 strlen(SMK_FSDEFAULT)) == 0) {
310 op += strlen(SMK_FSDEFAULT);
311 nsp = smk_import(op, 0);
312 if (nsp != NULL)
313 sp->smk_default = nsp;
314 } else if (strncmp(op, SMK_FSROOT, strlen(SMK_FSROOT)) == 0) {
315 op += strlen(SMK_FSROOT);
316 nsp = smk_import(op, 0);
317 if (nsp != NULL)
318 sp->smk_root = nsp;
319 }
320 }
321
322
323
324
325 isp = inode->i_security;
326 if (isp == NULL)
327 inode->i_security = new_inode_smack(sp->smk_root);
328 else
329 isp->smk_inode = sp->smk_root;
330
331 return 0;
332}
333
334
335
336
337
338
339
340
341static int smack_sb_statfs(struct dentry *dentry)
342{
343 struct superblock_smack *sbp = dentry->d_sb->s_security;
344 int rc;
345 struct smk_audit_info ad;
346
347 smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS);
348 smk_ad_setfield_u_fs_path_dentry(&ad, dentry);
349
350 rc = smk_curacc(sbp->smk_floor, MAY_READ, &ad);
351 return rc;
352}
353
354
355
356
357
358
359
360
361
362
363
364
365static int smack_sb_mount(char *dev_name, struct path *path,
366 char *type, unsigned long flags, void *data)
367{
368 struct superblock_smack *sbp = path->mnt->mnt_sb->s_security;
369 struct smk_audit_info ad;
370
371 smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS);
372 smk_ad_setfield_u_fs_path(&ad, *path);
373
374 return smk_curacc(sbp->smk_floor, MAY_WRITE, &ad);
375}
376
377
378
379
380
381
382
383
384
385static int smack_sb_umount(struct vfsmount *mnt, int flags)
386{
387 struct superblock_smack *sbp;
388 struct smk_audit_info ad;
389
390 smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS);
391 smk_ad_setfield_u_fs_path_dentry(&ad, mnt->mnt_root);
392 smk_ad_setfield_u_fs_path_mnt(&ad, mnt);
393
394 sbp = mnt->mnt_sb->s_security;
395 return smk_curacc(sbp->smk_floor, MAY_WRITE, &ad);
396}
397
398
399
400
401
402static int smack_bprm_set_creds(struct linux_binprm *bprm)
403{
404 struct task_smack *tsp = bprm->cred->security;
405 struct inode_smack *isp;
406 struct dentry *dp;
407 int rc;
408
409 rc = cap_bprm_set_creds(bprm);
410 if (rc != 0)
411 return rc;
412
413 if (bprm->cred_prepared)
414 return 0;
415
416 if (bprm->file == NULL || bprm->file->f_dentry == NULL)
417 return 0;
418
419 dp = bprm->file->f_dentry;
420
421 if (dp->d_inode == NULL)
422 return 0;
423
424 isp = dp->d_inode->i_security;
425
426 if (isp->smk_task != NULL)
427 tsp->smk_task = isp->smk_task;
428
429 return 0;
430}
431
432
433
434
435
436
437
438
439
440
441
442static int smack_inode_alloc_security(struct inode *inode)
443{
444 inode->i_security = new_inode_smack(smk_of_current());
445 if (inode->i_security == NULL)
446 return -ENOMEM;
447 return 0;
448}
449
450
451
452
453
454
455
456static void smack_inode_free_security(struct inode *inode)
457{
458 kfree(inode->i_security);
459 inode->i_security = NULL;
460}
461
462
463
464
465
466
467
468
469
470
471
472static int smack_inode_init_security(struct inode *inode, struct inode *dir,
473 char **name, void **value, size_t *len)
474{
475 char *isp = smk_of_inode(inode);
476 char *dsp = smk_of_inode(dir);
477 u32 may;
478
479 if (name) {
480 *name = kstrdup(XATTR_SMACK_SUFFIX, GFP_KERNEL);
481 if (*name == NULL)
482 return -ENOMEM;
483 }
484
485 if (value) {
486 may = smk_access_entry(smk_of_current(), dsp);
487
488
489
490
491
492
493 if (((may & MAY_TRANSMUTE) != 0) && smk_inode_transmutable(dir))
494 isp = dsp;
495
496 *value = kstrdup(isp, GFP_KERNEL);
497 if (*value == NULL)
498 return -ENOMEM;
499 }
500
501 if (len)
502 *len = strlen(isp) + 1;
503
504 return 0;
505}
506
507
508
509
510
511
512
513
514
515static int smack_inode_link(struct dentry *old_dentry, struct inode *dir,
516 struct dentry *new_dentry)
517{
518 char *isp;
519 struct smk_audit_info ad;
520 int rc;
521
522 smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS);
523 smk_ad_setfield_u_fs_path_dentry(&ad, old_dentry);
524
525 isp = smk_of_inode(old_dentry->d_inode);
526 rc = smk_curacc(isp, MAY_WRITE, &ad);
527
528 if (rc == 0 && new_dentry->d_inode != NULL) {
529 isp = smk_of_inode(new_dentry->d_inode);
530 smk_ad_setfield_u_fs_path_dentry(&ad, new_dentry);
531 rc = smk_curacc(isp, MAY_WRITE, &ad);
532 }
533
534 return rc;
535}
536
537
538
539
540
541
542
543
544
545static int smack_inode_unlink(struct inode *dir, struct dentry *dentry)
546{
547 struct inode *ip = dentry->d_inode;
548 struct smk_audit_info ad;
549 int rc;
550
551 smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS);
552 smk_ad_setfield_u_fs_path_dentry(&ad, dentry);
553
554
555
556
557 rc = smk_curacc(smk_of_inode(ip), MAY_WRITE, &ad);
558 if (rc == 0) {
559
560
561
562 smk_ad_setfield_u_fs_path_dentry(&ad, NULL);
563 smk_ad_setfield_u_fs_inode(&ad, dir);
564 rc = smk_curacc(smk_of_inode(dir), MAY_WRITE, &ad);
565 }
566 return rc;
567}
568
569
570
571
572
573
574
575
576
577static int smack_inode_rmdir(struct inode *dir, struct dentry *dentry)
578{
579 struct smk_audit_info ad;
580 int rc;
581
582 smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS);
583 smk_ad_setfield_u_fs_path_dentry(&ad, dentry);
584
585
586
587
588 rc = smk_curacc(smk_of_inode(dentry->d_inode), MAY_WRITE, &ad);
589 if (rc == 0) {
590
591
592
593 smk_ad_setfield_u_fs_path_dentry(&ad, NULL);
594 smk_ad_setfield_u_fs_inode(&ad, dir);
595 rc = smk_curacc(smk_of_inode(dir), MAY_WRITE, &ad);
596 }
597
598 return rc;
599}
600
601
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609
610
611
612
613static int smack_inode_rename(struct inode *old_inode,
614 struct dentry *old_dentry,
615 struct inode *new_inode,
616 struct dentry *new_dentry)
617{
618 int rc;
619 char *isp;
620 struct smk_audit_info ad;
621
622 smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS);
623 smk_ad_setfield_u_fs_path_dentry(&ad, old_dentry);
624
625 isp = smk_of_inode(old_dentry->d_inode);
626 rc = smk_curacc(isp, MAY_READWRITE, &ad);
627
628 if (rc == 0 && new_dentry->d_inode != NULL) {
629 isp = smk_of_inode(new_dentry->d_inode);
630 smk_ad_setfield_u_fs_path_dentry(&ad, new_dentry);
631 rc = smk_curacc(isp, MAY_READWRITE, &ad);
632 }
633 return rc;
634}
635
636
637
638
639
640
641
642
643
644
645static int smack_inode_permission(struct inode *inode, int mask)
646{
647 struct smk_audit_info ad;
648
649 mask &= (MAY_READ|MAY_WRITE|MAY_EXEC|MAY_APPEND);
650
651
652
653 if (mask == 0)
654 return 0;
655 smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS);
656 smk_ad_setfield_u_fs_inode(&ad, inode);
657 return smk_curacc(smk_of_inode(inode), mask, &ad);
658}
659
660
661
662
663
664
665
666
667static int smack_inode_setattr(struct dentry *dentry, struct iattr *iattr)
668{
669 struct smk_audit_info ad;
670
671
672
673 if (iattr->ia_valid & ATTR_FORCE)
674 return 0;
675 smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS);
676 smk_ad_setfield_u_fs_path_dentry(&ad, dentry);
677
678 return smk_curacc(smk_of_inode(dentry->d_inode), MAY_WRITE, &ad);
679}
680
681
682
683
684
685
686
687
688static int smack_inode_getattr(struct vfsmount *mnt, struct dentry *dentry)
689{
690 struct smk_audit_info ad;
691
692 smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS);
693 smk_ad_setfield_u_fs_path_dentry(&ad, dentry);
694 smk_ad_setfield_u_fs_path_mnt(&ad, mnt);
695 return smk_curacc(smk_of_inode(dentry->d_inode), MAY_READ, &ad);
696}
697
698
699
700
701
702
703
704
705
706
707
708
709
710static int smack_inode_setxattr(struct dentry *dentry, const char *name,
711 const void *value, size_t size, int flags)
712{
713 struct smk_audit_info ad;
714 int rc = 0;
715
716 if (strcmp(name, XATTR_NAME_SMACK) == 0 ||
717 strcmp(name, XATTR_NAME_SMACKIPIN) == 0 ||
718 strcmp(name, XATTR_NAME_SMACKIPOUT) == 0 ||
719 strcmp(name, XATTR_NAME_SMACKEXEC) == 0) {
720 if (!capable(CAP_MAC_ADMIN))
721 rc = -EPERM;
722
723
724
725
726 if (size == 0 || size >= SMK_LABELLEN ||
727 smk_import(value, size) == NULL)
728 rc = -EINVAL;
729 } else if (strcmp(name, XATTR_NAME_SMACKTRANSMUTE) == 0) {
730 if (!capable(CAP_MAC_ADMIN))
731 rc = -EPERM;
732 if (size != TRANS_TRUE_SIZE ||
733 strncmp(value, TRANS_TRUE, TRANS_TRUE_SIZE) != 0)
734 rc = -EINVAL;
735 } else
736 rc = cap_inode_setxattr(dentry, name, value, size, flags);
737
738 smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS);
739 smk_ad_setfield_u_fs_path_dentry(&ad, dentry);
740
741 if (rc == 0)
742 rc = smk_curacc(smk_of_inode(dentry->d_inode), MAY_WRITE, &ad);
743
744 return rc;
745}
746
747
748
749
750
751
752
753
754
755
756
757
758static void smack_inode_post_setxattr(struct dentry *dentry, const char *name,
759 const void *value, size_t size, int flags)
760{
761 char *nsp;
762 struct inode_smack *isp = dentry->d_inode->i_security;
763
764 if (strcmp(name, XATTR_NAME_SMACK) == 0) {
765 nsp = smk_import(value, size);
766 if (nsp != NULL)
767 isp->smk_inode = nsp;
768 else
769 isp->smk_inode = smack_known_invalid.smk_known;
770 } else if (strcmp(name, XATTR_NAME_SMACKEXEC) == 0) {
771 nsp = smk_import(value, size);
772 if (nsp != NULL)
773 isp->smk_task = nsp;
774 else
775 isp->smk_task = smack_known_invalid.smk_known;
776 } else if (strcmp(name, XATTR_NAME_SMACKTRANSMUTE) == 0)
777 isp->smk_flags |= SMK_INODE_TRANSMUTE;
778
779 return;
780}
781
782
783
784
785
786
787
788
789static int smack_inode_getxattr(struct dentry *dentry, const char *name)
790{
791 struct smk_audit_info ad;
792
793 smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS);
794 smk_ad_setfield_u_fs_path_dentry(&ad, dentry);
795
796 return smk_curacc(smk_of_inode(dentry->d_inode), MAY_READ, &ad);
797}
798
799
800
801
802
803
804
805
806
807
808static int smack_inode_removexattr(struct dentry *dentry, const char *name)
809{
810 struct inode_smack *isp;
811 struct smk_audit_info ad;
812 int rc = 0;
813
814 if (strcmp(name, XATTR_NAME_SMACK) == 0 ||
815 strcmp(name, XATTR_NAME_SMACKIPIN) == 0 ||
816 strcmp(name, XATTR_NAME_SMACKIPOUT) == 0 ||
817 strcmp(name, XATTR_NAME_SMACKEXEC) == 0 ||
818 strcmp(name, XATTR_NAME_SMACKTRANSMUTE) == 0) {
819 if (!capable(CAP_MAC_ADMIN))
820 rc = -EPERM;
821 } else
822 rc = cap_inode_removexattr(dentry, name);
823
824 smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS);
825 smk_ad_setfield_u_fs_path_dentry(&ad, dentry);
826 if (rc == 0)
827 rc = smk_curacc(smk_of_inode(dentry->d_inode), MAY_WRITE, &ad);
828
829 if (rc == 0) {
830 isp = dentry->d_inode->i_security;
831 isp->smk_task = NULL;
832 }
833
834 return rc;
835}
836
837
838
839
840
841
842
843
844
845
846static int smack_inode_getsecurity(const struct inode *inode,
847 const char *name, void **buffer,
848 bool alloc)
849{
850 struct socket_smack *ssp;
851 struct socket *sock;
852 struct super_block *sbp;
853 struct inode *ip = (struct inode *)inode;
854 char *isp;
855 int ilen;
856 int rc = 0;
857
858 if (strcmp(name, XATTR_SMACK_SUFFIX) == 0) {
859 isp = smk_of_inode(inode);
860 ilen = strlen(isp) + 1;
861 *buffer = isp;
862 return ilen;
863 }
864
865
866
867
868 sbp = ip->i_sb;
869 if (sbp->s_magic != SOCKFS_MAGIC)
870 return -EOPNOTSUPP;
871
872 sock = SOCKET_I(ip);
873 if (sock == NULL || sock->sk == NULL)
874 return -EOPNOTSUPP;
875
876 ssp = sock->sk->sk_security;
877
878 if (strcmp(name, XATTR_SMACK_IPIN) == 0)
879 isp = ssp->smk_in;
880 else if (strcmp(name, XATTR_SMACK_IPOUT) == 0)
881 isp = ssp->smk_out;
882 else
883 return -EOPNOTSUPP;
884
885 ilen = strlen(isp) + 1;
886 if (rc == 0) {
887 *buffer = isp;
888 rc = ilen;
889 }
890
891 return rc;
892}
893
894
895
896
897
898
899
900
901
902
903static int smack_inode_listsecurity(struct inode *inode, char *buffer,
904 size_t buffer_size)
905{
906 int len = strlen(XATTR_NAME_SMACK);
907
908 if (buffer != NULL && len <= buffer_size) {
909 memcpy(buffer, XATTR_NAME_SMACK, len);
910 return len;
911 }
912 return -EINVAL;
913}
914
915
916
917
918
919
920static void smack_inode_getsecid(const struct inode *inode, u32 *secid)
921{
922 struct inode_smack *isp = inode->i_security;
923
924 *secid = smack_to_secid(isp->smk_inode);
925}
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945static int smack_file_permission(struct file *file, int mask)
946{
947 return 0;
948}
949
950
951
952
953
954
955
956
957
958
959static int smack_file_alloc_security(struct file *file)
960{
961 file->f_security = smk_of_current();
962 return 0;
963}
964
965
966
967
968
969
970
971
972static void smack_file_free_security(struct file *file)
973{
974 file->f_security = NULL;
975}
976
977
978
979
980
981
982
983
984
985
986
987static int smack_file_ioctl(struct file *file, unsigned int cmd,
988 unsigned long arg)
989{
990 int rc = 0;
991 struct smk_audit_info ad;
992
993 smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS);
994 smk_ad_setfield_u_fs_path(&ad, file->f_path);
995
996 if (_IOC_DIR(cmd) & _IOC_WRITE)
997 rc = smk_curacc(file->f_security, MAY_WRITE, &ad);
998
999 if (rc == 0 && (_IOC_DIR(cmd) & _IOC_READ))
1000 rc = smk_curacc(file->f_security, MAY_READ, &ad);
1001
1002 return rc;
1003}
1004
1005
1006
1007
1008
1009
1010
1011
1012static int smack_file_lock(struct file *file, unsigned int cmd)
1013{
1014 struct smk_audit_info ad;
1015
1016 smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS);
1017 smk_ad_setfield_u_fs_path_dentry(&ad, file->f_path.dentry);
1018 return smk_curacc(file->f_security, MAY_WRITE, &ad);
1019}
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029static int smack_file_fcntl(struct file *file, unsigned int cmd,
1030 unsigned long arg)
1031{
1032 struct smk_audit_info ad;
1033 int rc;
1034
1035 smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS);
1036 smk_ad_setfield_u_fs_path(&ad, file->f_path);
1037
1038 switch (cmd) {
1039 case F_DUPFD:
1040 case F_GETFD:
1041 case F_GETFL:
1042 case F_GETLK:
1043 case F_GETOWN:
1044 case F_GETSIG:
1045 rc = smk_curacc(file->f_security, MAY_READ, &ad);
1046 break;
1047 case F_SETFD:
1048 case F_SETFL:
1049 case F_SETLK:
1050 case F_SETLKW:
1051 case F_SETOWN:
1052 case F_SETSIG:
1053 rc = smk_curacc(file->f_security, MAY_WRITE, &ad);
1054 break;
1055 default:
1056 rc = smk_curacc(file->f_security, MAY_READWRITE, &ad);
1057 }
1058
1059 return rc;
1060}
1061
1062
1063
1064
1065
1066
1067
1068
1069static int smack_file_set_fowner(struct file *file)
1070{
1071 file->f_security = smk_of_current();
1072 return 0;
1073}
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086static int smack_file_send_sigiotask(struct task_struct *tsk,
1087 struct fown_struct *fown, int signum)
1088{
1089 struct file *file;
1090 int rc;
1091 char *tsp = smk_of_task(tsk->cred->security);
1092 struct smk_audit_info ad;
1093
1094
1095
1096
1097 file = container_of(fown, struct file, f_owner);
1098
1099 rc = smk_access(file->f_security, tsp, MAY_WRITE, NULL);
1100 if (rc != 0 && has_capability(tsk, CAP_MAC_OVERRIDE))
1101 rc = 0;
1102
1103 smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_TASK);
1104 smk_ad_setfield_u_tsk(&ad, tsk);
1105 smack_log(file->f_security, tsp, MAY_WRITE, rc, &ad);
1106 return rc;
1107}
1108
1109
1110
1111
1112
1113
1114
1115static int smack_file_receive(struct file *file)
1116{
1117 int may = 0;
1118 struct smk_audit_info ad;
1119
1120 smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_TASK);
1121 smk_ad_setfield_u_fs_path(&ad, file->f_path);
1122
1123
1124
1125 if (file->f_mode & FMODE_READ)
1126 may = MAY_READ;
1127 if (file->f_mode & FMODE_WRITE)
1128 may |= MAY_WRITE;
1129
1130 return smk_curacc(file->f_security, may, &ad);
1131}
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146static int smack_cred_alloc_blank(struct cred *cred, gfp_t gfp)
1147{
1148 cred->security = kzalloc(sizeof(struct task_smack), gfp);
1149 if (cred->security == NULL)
1150 return -ENOMEM;
1151 return 0;
1152}
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163static void smack_cred_free(struct cred *cred)
1164{
1165 kfree(cred->security);
1166}
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176static int smack_cred_prepare(struct cred *new, const struct cred *old,
1177 gfp_t gfp)
1178{
1179 struct task_smack *old_tsp = old->security;
1180 struct task_smack *new_tsp;
1181
1182 new_tsp = kzalloc(sizeof(struct task_smack), gfp);
1183 if (new_tsp == NULL)
1184 return -ENOMEM;
1185
1186 new_tsp->smk_task = old_tsp->smk_task;
1187 new_tsp->smk_forked = old_tsp->smk_task;
1188 new->security = new_tsp;
1189 return 0;
1190}
1191
1192
1193
1194
1195
1196
1197
1198
1199static void smack_cred_transfer(struct cred *new, const struct cred *old)
1200{
1201 struct task_smack *old_tsp = old->security;
1202 struct task_smack *new_tsp = new->security;
1203
1204 new_tsp->smk_task = old_tsp->smk_task;
1205 new_tsp->smk_forked = old_tsp->smk_task;
1206}
1207
1208
1209
1210
1211
1212
1213
1214
1215static int smack_kernel_act_as(struct cred *new, u32 secid)
1216{
1217 struct task_smack *new_tsp = new->security;
1218 char *smack = smack_from_secid(secid);
1219
1220 if (smack == NULL)
1221 return -EINVAL;
1222
1223 new_tsp->smk_task = smack;
1224 return 0;
1225}
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235static int smack_kernel_create_files_as(struct cred *new,
1236 struct inode *inode)
1237{
1238 struct inode_smack *isp = inode->i_security;
1239 struct task_smack *tsp = new->security;
1240
1241 tsp->smk_forked = isp->smk_inode;
1242 tsp->smk_task = isp->smk_inode;
1243 return 0;
1244}
1245
1246
1247
1248
1249
1250
1251
1252
1253static int smk_curacc_on_task(struct task_struct *p, int access)
1254{
1255 struct smk_audit_info ad;
1256
1257 smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_TASK);
1258 smk_ad_setfield_u_tsk(&ad, p);
1259 return smk_curacc(smk_of_task(task_security(p)), access, &ad);
1260}
1261
1262
1263
1264
1265
1266
1267
1268
1269static int smack_task_setpgid(struct task_struct *p, pid_t pgid)
1270{
1271 return smk_curacc_on_task(p, MAY_WRITE);
1272}
1273
1274
1275
1276
1277
1278
1279
1280static int smack_task_getpgid(struct task_struct *p)
1281{
1282 return smk_curacc_on_task(p, MAY_READ);
1283}
1284
1285
1286
1287
1288
1289
1290
1291static int smack_task_getsid(struct task_struct *p)
1292{
1293 return smk_curacc_on_task(p, MAY_READ);
1294}
1295
1296
1297
1298
1299
1300
1301
1302
1303static void smack_task_getsecid(struct task_struct *p, u32 *secid)
1304{
1305 *secid = smack_to_secid(smk_of_task(task_security(p)));
1306}
1307
1308
1309
1310
1311
1312
1313
1314
1315static int smack_task_setnice(struct task_struct *p, int nice)
1316{
1317 int rc;
1318
1319 rc = cap_task_setnice(p, nice);
1320 if (rc == 0)
1321 rc = smk_curacc_on_task(p, MAY_WRITE);
1322 return rc;
1323}
1324
1325
1326
1327
1328
1329
1330
1331
1332static int smack_task_setioprio(struct task_struct *p, int ioprio)
1333{
1334 int rc;
1335
1336 rc = cap_task_setioprio(p, ioprio);
1337 if (rc == 0)
1338 rc = smk_curacc_on_task(p, MAY_WRITE);
1339 return rc;
1340}
1341
1342
1343
1344
1345
1346
1347
1348static int smack_task_getioprio(struct task_struct *p)
1349{
1350 return smk_curacc_on_task(p, MAY_READ);
1351}
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361static int smack_task_setscheduler(struct task_struct *p)
1362{
1363 int rc;
1364
1365 rc = cap_task_setscheduler(p);
1366 if (rc == 0)
1367 rc = smk_curacc_on_task(p, MAY_WRITE);
1368 return rc;
1369}
1370
1371
1372
1373
1374
1375
1376
1377static int smack_task_getscheduler(struct task_struct *p)
1378{
1379 return smk_curacc_on_task(p, MAY_READ);
1380}
1381
1382
1383
1384
1385
1386
1387
1388static int smack_task_movememory(struct task_struct *p)
1389{
1390 return smk_curacc_on_task(p, MAY_WRITE);
1391}
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405static int smack_task_kill(struct task_struct *p, struct siginfo *info,
1406 int sig, u32 secid)
1407{
1408 struct smk_audit_info ad;
1409
1410 smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_TASK);
1411 smk_ad_setfield_u_tsk(&ad, p);
1412
1413
1414
1415
1416 if (secid == 0)
1417 return smk_curacc(smk_of_task(task_security(p)), MAY_WRITE,
1418 &ad);
1419
1420
1421
1422
1423
1424 return smk_access(smack_from_secid(secid),
1425 smk_of_task(task_security(p)), MAY_WRITE, &ad);
1426}
1427
1428
1429
1430
1431
1432
1433
1434static int smack_task_wait(struct task_struct *p)
1435{
1436 struct smk_audit_info ad;
1437 char *sp = smk_of_current();
1438 char *tsp = smk_of_forked(task_security(p));
1439 int rc;
1440
1441
1442 rc = smk_access(tsp, sp, MAY_WRITE, NULL);
1443 if (rc == 0)
1444 goto out_log;
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457 if (capable(CAP_MAC_OVERRIDE) || has_capability(p, CAP_MAC_OVERRIDE))
1458 rc = 0;
1459
1460 out_log:
1461 smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_TASK);
1462 smk_ad_setfield_u_tsk(&ad, p);
1463 smack_log(tsp, sp, MAY_WRITE, rc, &ad);
1464 return rc;
1465}
1466
1467
1468
1469
1470
1471
1472
1473
1474static void smack_task_to_inode(struct task_struct *p, struct inode *inode)
1475{
1476 struct inode_smack *isp = inode->i_security;
1477 isp->smk_inode = smk_of_task(task_security(p));
1478}
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494static int smack_sk_alloc_security(struct sock *sk, int family, gfp_t gfp_flags)
1495{
1496 char *csp = smk_of_current();
1497 struct socket_smack *ssp;
1498
1499 ssp = kzalloc(sizeof(struct socket_smack), gfp_flags);
1500 if (ssp == NULL)
1501 return -ENOMEM;
1502
1503 ssp->smk_in = csp;
1504 ssp->smk_out = csp;
1505 ssp->smk_packet[0] = '\0';
1506
1507 sk->sk_security = ssp;
1508
1509 return 0;
1510}
1511
1512
1513
1514
1515
1516
1517
1518static void smack_sk_free_security(struct sock *sk)
1519{
1520 kfree(sk->sk_security);
1521}
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535static char *smack_host_label(struct sockaddr_in *sip)
1536{
1537 struct smk_netlbladdr *snp;
1538 struct in_addr *siap = &sip->sin_addr;
1539
1540 if (siap->s_addr == 0)
1541 return NULL;
1542
1543 list_for_each_entry_rcu(snp, &smk_netlbladdr_list, list)
1544
1545
1546
1547
1548
1549 if ((&snp->smk_host.sin_addr)->s_addr ==
1550 (siap->s_addr & (&snp->smk_mask)->s_addr)) {
1551
1552 if (snp->smk_label == smack_cipso_option)
1553 return NULL;
1554 return snp->smk_label;
1555 }
1556
1557 return NULL;
1558}
1559
1560
1561
1562
1563
1564
1565
1566
1567static void smack_set_catset(char *catset, struct netlbl_lsm_secattr *sap)
1568{
1569 unsigned char *cp;
1570 unsigned char m;
1571 int cat;
1572 int rc;
1573 int byte;
1574
1575 if (!catset)
1576 return;
1577
1578 sap->flags |= NETLBL_SECATTR_MLS_CAT;
1579 sap->attr.mls.cat = netlbl_secattr_catmap_alloc(GFP_ATOMIC);
1580 sap->attr.mls.cat->startbit = 0;
1581
1582 for (cat = 1, cp = catset, byte = 0; byte < SMK_LABELLEN; cp++, byte++)
1583 for (m = 0x80; m != 0; m >>= 1, cat++) {
1584 if ((m & *cp) == 0)
1585 continue;
1586 rc = netlbl_secattr_catmap_setbit(sap->attr.mls.cat,
1587 cat, GFP_ATOMIC);
1588 }
1589}
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601static void smack_to_secattr(char *smack, struct netlbl_lsm_secattr *nlsp)
1602{
1603 struct smack_cipso cipso;
1604 int rc;
1605
1606 nlsp->domain = smack;
1607 nlsp->flags = NETLBL_SECATTR_DOMAIN | NETLBL_SECATTR_MLS_LVL;
1608
1609 rc = smack_to_cipso(smack, &cipso);
1610 if (rc == 0) {
1611 nlsp->attr.mls.lvl = cipso.smk_level;
1612 smack_set_catset(cipso.smk_catset, nlsp);
1613 } else {
1614 nlsp->attr.mls.lvl = smack_cipso_direct;
1615 smack_set_catset(smack, nlsp);
1616 }
1617}
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629static int smack_netlabel(struct sock *sk, int labeled)
1630{
1631 struct socket_smack *ssp = sk->sk_security;
1632 struct netlbl_lsm_secattr secattr;
1633 int rc = 0;
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643 local_bh_disable();
1644 bh_lock_sock_nested(sk);
1645
1646 if (ssp->smk_out == smack_net_ambient ||
1647 labeled == SMACK_UNLABELED_SOCKET)
1648 netlbl_sock_delattr(sk);
1649 else {
1650 netlbl_secattr_init(&secattr);
1651 smack_to_secattr(ssp->smk_out, &secattr);
1652 rc = netlbl_sock_setattr(sk, sk->sk_family, &secattr);
1653 netlbl_secattr_destroy(&secattr);
1654 }
1655
1656 bh_unlock_sock(sk);
1657 local_bh_enable();
1658
1659 return rc;
1660}
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673static int smack_netlabel_send(struct sock *sk, struct sockaddr_in *sap)
1674{
1675 int rc;
1676 int sk_lbl;
1677 char *hostsp;
1678 struct socket_smack *ssp = sk->sk_security;
1679 struct smk_audit_info ad;
1680
1681 rcu_read_lock();
1682 hostsp = smack_host_label(sap);
1683 if (hostsp != NULL) {
1684 sk_lbl = SMACK_UNLABELED_SOCKET;
1685#ifdef CONFIG_AUDIT
1686 smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_NET);
1687 ad.a.u.net.family = sap->sin_family;
1688 ad.a.u.net.dport = sap->sin_port;
1689 ad.a.u.net.v4info.daddr = sap->sin_addr.s_addr;
1690#endif
1691 rc = smk_access(ssp->smk_out, hostsp, MAY_WRITE, &ad);
1692 } else {
1693 sk_lbl = SMACK_CIPSO_SOCKET;
1694 rc = 0;
1695 }
1696 rcu_read_unlock();
1697 if (rc != 0)
1698 return rc;
1699
1700 return smack_netlabel(sk, sk_lbl);
1701}
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715static int smack_inode_setsecurity(struct inode *inode, const char *name,
1716 const void *value, size_t size, int flags)
1717{
1718 char *sp;
1719 struct inode_smack *nsp = inode->i_security;
1720 struct socket_smack *ssp;
1721 struct socket *sock;
1722 int rc = 0;
1723
1724 if (value == NULL || size > SMK_LABELLEN || size == 0)
1725 return -EACCES;
1726
1727 sp = smk_import(value, size);
1728 if (sp == NULL)
1729 return -EINVAL;
1730
1731 if (strcmp(name, XATTR_SMACK_SUFFIX) == 0) {
1732 nsp->smk_inode = sp;
1733 nsp->smk_flags |= SMK_INODE_INSTANT;
1734 return 0;
1735 }
1736
1737
1738
1739 if (inode->i_sb->s_magic != SOCKFS_MAGIC)
1740 return -EOPNOTSUPP;
1741
1742 sock = SOCKET_I(inode);
1743 if (sock == NULL || sock->sk == NULL)
1744 return -EOPNOTSUPP;
1745
1746 ssp = sock->sk->sk_security;
1747
1748 if (strcmp(name, XATTR_SMACK_IPIN) == 0)
1749 ssp->smk_in = sp;
1750 else if (strcmp(name, XATTR_SMACK_IPOUT) == 0) {
1751 ssp->smk_out = sp;
1752 if (sock->sk->sk_family != PF_UNIX) {
1753 rc = smack_netlabel(sock->sk, SMACK_CIPSO_SOCKET);
1754 if (rc != 0)
1755 printk(KERN_WARNING
1756 "Smack: \"%s\" netlbl error %d.\n",
1757 __func__, -rc);
1758 }
1759 } else
1760 return -EOPNOTSUPP;
1761
1762 return 0;
1763}
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777static int smack_socket_post_create(struct socket *sock, int family,
1778 int type, int protocol, int kern)
1779{
1780 if (family != PF_INET || sock->sk == NULL)
1781 return 0;
1782
1783
1784
1785 return smack_netlabel(sock->sk, SMACK_CIPSO_SOCKET);
1786}
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798static int smack_socket_connect(struct socket *sock, struct sockaddr *sap,
1799 int addrlen)
1800{
1801 if (sock->sk == NULL || sock->sk->sk_family != PF_INET)
1802 return 0;
1803 if (addrlen < sizeof(struct sockaddr_in))
1804 return -EINVAL;
1805
1806 return smack_netlabel_send(sock->sk, (struct sockaddr_in *)sap);
1807}
1808
1809
1810
1811
1812
1813
1814
1815static int smack_flags_to_may(int flags)
1816{
1817 int may = 0;
1818
1819 if (flags & S_IRUGO)
1820 may |= MAY_READ;
1821 if (flags & S_IWUGO)
1822 may |= MAY_WRITE;
1823 if (flags & S_IXUGO)
1824 may |= MAY_EXEC;
1825
1826 return may;
1827}
1828
1829
1830
1831
1832
1833
1834
1835static int smack_msg_msg_alloc_security(struct msg_msg *msg)
1836{
1837 msg->security = smk_of_current();
1838 return 0;
1839}
1840
1841
1842
1843
1844
1845
1846
1847static void smack_msg_msg_free_security(struct msg_msg *msg)
1848{
1849 msg->security = NULL;
1850}
1851
1852
1853
1854
1855
1856
1857
1858static char *smack_of_shm(struct shmid_kernel *shp)
1859{
1860 return (char *)shp->shm_perm.security;
1861}
1862
1863
1864
1865
1866
1867
1868
1869static int smack_shm_alloc_security(struct shmid_kernel *shp)
1870{
1871 struct kern_ipc_perm *isp = &shp->shm_perm;
1872
1873 isp->security = smk_of_current();
1874 return 0;
1875}
1876
1877
1878
1879
1880
1881
1882
1883static void smack_shm_free_security(struct shmid_kernel *shp)
1884{
1885 struct kern_ipc_perm *isp = &shp->shm_perm;
1886
1887 isp->security = NULL;
1888}
1889
1890
1891
1892
1893
1894
1895
1896
1897static int smk_curacc_shm(struct shmid_kernel *shp, int access)
1898{
1899 char *ssp = smack_of_shm(shp);
1900 struct smk_audit_info ad;
1901
1902#ifdef CONFIG_AUDIT
1903 smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_IPC);
1904 ad.a.u.ipc_id = shp->shm_perm.id;
1905#endif
1906 return smk_curacc(ssp, access, &ad);
1907}
1908
1909
1910
1911
1912
1913
1914
1915
1916static int smack_shm_associate(struct shmid_kernel *shp, int shmflg)
1917{
1918 int may;
1919
1920 may = smack_flags_to_may(shmflg);
1921 return smk_curacc_shm(shp, may);
1922}
1923
1924
1925
1926
1927
1928
1929
1930
1931static int smack_shm_shmctl(struct shmid_kernel *shp, int cmd)
1932{
1933 int may;
1934
1935 switch (cmd) {
1936 case IPC_STAT:
1937 case SHM_STAT:
1938 may = MAY_READ;
1939 break;
1940 case IPC_SET:
1941 case SHM_LOCK:
1942 case SHM_UNLOCK:
1943 case IPC_RMID:
1944 may = MAY_READWRITE;
1945 break;
1946 case IPC_INFO:
1947 case SHM_INFO:
1948
1949
1950
1951 return 0;
1952 default:
1953 return -EINVAL;
1954 }
1955 return smk_curacc_shm(shp, may);
1956}
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966static int smack_shm_shmat(struct shmid_kernel *shp, char __user *shmaddr,
1967 int shmflg)
1968{
1969 int may;
1970
1971 may = smack_flags_to_may(shmflg);
1972 return smk_curacc_shm(shp, may);
1973}
1974
1975
1976
1977
1978
1979
1980
1981static char *smack_of_sem(struct sem_array *sma)
1982{
1983 return (char *)sma->sem_perm.security;
1984}
1985
1986
1987
1988
1989
1990
1991
1992static int smack_sem_alloc_security(struct sem_array *sma)
1993{
1994 struct kern_ipc_perm *isp = &sma->sem_perm;
1995
1996 isp->security = smk_of_current();
1997 return 0;
1998}
1999
2000
2001
2002
2003
2004
2005
2006static void smack_sem_free_security(struct sem_array *sma)
2007{
2008 struct kern_ipc_perm *isp = &sma->sem_perm;
2009
2010 isp->security = NULL;
2011}
2012
2013
2014
2015
2016
2017
2018
2019
2020static int smk_curacc_sem(struct sem_array *sma, int access)
2021{
2022 char *ssp = smack_of_sem(sma);
2023 struct smk_audit_info ad;
2024
2025#ifdef CONFIG_AUDIT
2026 smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_IPC);
2027 ad.a.u.ipc_id = sma->sem_perm.id;
2028#endif
2029 return smk_curacc(ssp, access, &ad);
2030}
2031
2032
2033
2034
2035
2036
2037
2038
2039static int smack_sem_associate(struct sem_array *sma, int semflg)
2040{
2041 int may;
2042
2043 may = smack_flags_to_may(semflg);
2044 return smk_curacc_sem(sma, may);
2045}
2046
2047
2048
2049
2050
2051
2052
2053
2054static int smack_sem_semctl(struct sem_array *sma, int cmd)
2055{
2056 int may;
2057
2058 switch (cmd) {
2059 case GETPID:
2060 case GETNCNT:
2061 case GETZCNT:
2062 case GETVAL:
2063 case GETALL:
2064 case IPC_STAT:
2065 case SEM_STAT:
2066 may = MAY_READ;
2067 break;
2068 case SETVAL:
2069 case SETALL:
2070 case IPC_RMID:
2071 case IPC_SET:
2072 may = MAY_READWRITE;
2073 break;
2074 case IPC_INFO:
2075 case SEM_INFO:
2076
2077
2078
2079 return 0;
2080 default:
2081 return -EINVAL;
2082 }
2083
2084 return smk_curacc_sem(sma, may);
2085}
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098static int smack_sem_semop(struct sem_array *sma, struct sembuf *sops,
2099 unsigned nsops, int alter)
2100{
2101 return smk_curacc_sem(sma, MAY_READWRITE);
2102}
2103
2104
2105
2106
2107
2108
2109
2110static int smack_msg_queue_alloc_security(struct msg_queue *msq)
2111{
2112 struct kern_ipc_perm *kisp = &msq->q_perm;
2113
2114 kisp->security = smk_of_current();
2115 return 0;
2116}
2117
2118
2119
2120
2121
2122
2123
2124static void smack_msg_queue_free_security(struct msg_queue *msq)
2125{
2126 struct kern_ipc_perm *kisp = &msq->q_perm;
2127
2128 kisp->security = NULL;
2129}
2130
2131
2132
2133
2134
2135
2136
2137static char *smack_of_msq(struct msg_queue *msq)
2138{
2139 return (char *)msq->q_perm.security;
2140}
2141
2142
2143
2144
2145
2146
2147
2148
2149static int smk_curacc_msq(struct msg_queue *msq, int access)
2150{
2151 char *msp = smack_of_msq(msq);
2152 struct smk_audit_info ad;
2153
2154#ifdef CONFIG_AUDIT
2155 smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_IPC);
2156 ad.a.u.ipc_id = msq->q_perm.id;
2157#endif
2158 return smk_curacc(msp, access, &ad);
2159}
2160
2161
2162
2163
2164
2165
2166
2167
2168static int smack_msg_queue_associate(struct msg_queue *msq, int msqflg)
2169{
2170 int may;
2171
2172 may = smack_flags_to_may(msqflg);
2173 return smk_curacc_msq(msq, may);
2174}
2175
2176
2177
2178
2179
2180
2181
2182
2183static int smack_msg_queue_msgctl(struct msg_queue *msq, int cmd)
2184{
2185 int may;
2186
2187 switch (cmd) {
2188 case IPC_STAT:
2189 case MSG_STAT:
2190 may = MAY_READ;
2191 break;
2192 case IPC_SET:
2193 case IPC_RMID:
2194 may = MAY_READWRITE;
2195 break;
2196 case IPC_INFO:
2197 case MSG_INFO:
2198
2199
2200
2201 return 0;
2202 default:
2203 return -EINVAL;
2204 }
2205
2206 return smk_curacc_msq(msq, may);
2207}
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217static int smack_msg_queue_msgsnd(struct msg_queue *msq, struct msg_msg *msg,
2218 int msqflg)
2219{
2220 int may;
2221
2222 may = smack_flags_to_may(msqflg);
2223 return smk_curacc_msq(msq, may);
2224}
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236static int smack_msg_queue_msgrcv(struct msg_queue *msq, struct msg_msg *msg,
2237 struct task_struct *target, long type, int mode)
2238{
2239 return smk_curacc_msq(msq, MAY_READWRITE);
2240}
2241
2242
2243
2244
2245
2246
2247
2248
2249static int smack_ipc_permission(struct kern_ipc_perm *ipp, short flag)
2250{
2251 char *isp = ipp->security;
2252 int may = smack_flags_to_may(flag);
2253 struct smk_audit_info ad;
2254
2255#ifdef CONFIG_AUDIT
2256 smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_IPC);
2257 ad.a.u.ipc_id = ipp->id;
2258#endif
2259 return smk_curacc(isp, may, &ad);
2260}
2261
2262
2263
2264
2265
2266
2267static void smack_ipc_getsecid(struct kern_ipc_perm *ipp, u32 *secid)
2268{
2269 char *smack = ipp->security;
2270
2271 *secid = smack_to_secid(smack);
2272}
2273
2274
2275
2276
2277
2278
2279
2280
2281static void smack_d_instantiate(struct dentry *opt_dentry, struct inode *inode)
2282{
2283 struct super_block *sbp;
2284 struct superblock_smack *sbsp;
2285 struct inode_smack *isp;
2286 char *csp = smk_of_current();
2287 char *fetched;
2288 char *final;
2289 char trattr[TRANS_TRUE_SIZE];
2290 int transflag = 0;
2291 struct dentry *dp;
2292
2293 if (inode == NULL)
2294 return;
2295
2296 isp = inode->i_security;
2297
2298 mutex_lock(&isp->smk_lock);
2299
2300
2301
2302
2303 if (isp->smk_flags & SMK_INODE_INSTANT)
2304 goto unlockandout;
2305
2306 sbp = inode->i_sb;
2307 sbsp = sbp->s_security;
2308
2309
2310
2311
2312 final = sbsp->smk_default;
2313
2314
2315
2316
2317
2318
2319
2320 if (opt_dentry->d_parent == opt_dentry) {
2321 isp->smk_inode = sbsp->smk_root;
2322 isp->smk_flags |= SMK_INODE_INSTANT;
2323 goto unlockandout;
2324 }
2325
2326
2327
2328
2329
2330
2331
2332 switch (sbp->s_magic) {
2333 case SMACK_MAGIC:
2334
2335
2336
2337
2338
2339 final = smack_known_star.smk_known;
2340 break;
2341 case PIPEFS_MAGIC:
2342
2343
2344
2345 final = smack_known_star.smk_known;
2346 break;
2347 case DEVPTS_SUPER_MAGIC:
2348
2349
2350
2351
2352
2353 final = csp;
2354 break;
2355 case SOCKFS_MAGIC:
2356
2357
2358
2359
2360 final = smack_known_star.smk_known;
2361 break;
2362 case PROC_SUPER_MAGIC:
2363
2364
2365
2366
2367 break;
2368 case TMPFS_MAGIC:
2369
2370
2371
2372
2373
2374 final = smack_known_star.smk_known;
2375
2376
2377
2378
2379
2380
2381
2382
2383 default:
2384
2385
2386
2387
2388
2389
2390
2391
2392 if (S_ISSOCK(inode->i_mode)) {
2393 final = smack_known_star.smk_known;
2394 break;
2395 }
2396
2397
2398
2399
2400
2401
2402 if (inode->i_op->getxattr == NULL)
2403 break;
2404
2405
2406
2407 dp = dget(opt_dentry);
2408 fetched = smk_fetch(XATTR_NAME_SMACK, inode, dp);
2409 if (fetched != NULL) {
2410 final = fetched;
2411 if (S_ISDIR(inode->i_mode)) {
2412 trattr[0] = '\0';
2413 inode->i_op->getxattr(dp,
2414 XATTR_NAME_SMACKTRANSMUTE,
2415 trattr, TRANS_TRUE_SIZE);
2416 if (strncmp(trattr, TRANS_TRUE,
2417 TRANS_TRUE_SIZE) == 0)
2418 transflag = SMK_INODE_TRANSMUTE;
2419 }
2420 }
2421 isp->smk_task = smk_fetch(XATTR_NAME_SMACKEXEC, inode, dp);
2422
2423 dput(dp);
2424 break;
2425 }
2426
2427 if (final == NULL)
2428 isp->smk_inode = csp;
2429 else
2430 isp->smk_inode = final;
2431
2432 isp->smk_flags |= (SMK_INODE_INSTANT | transflag);
2433
2434unlockandout:
2435 mutex_unlock(&isp->smk_lock);
2436 return;
2437}
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449static int smack_getprocattr(struct task_struct *p, char *name, char **value)
2450{
2451 char *cp;
2452 int slen;
2453
2454 if (strcmp(name, "current") != 0)
2455 return -EINVAL;
2456
2457 cp = kstrdup(smk_of_task(task_security(p)), GFP_KERNEL);
2458 if (cp == NULL)
2459 return -ENOMEM;
2460
2461 slen = strlen(cp);
2462 *value = cp;
2463 return slen;
2464}
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478static int smack_setprocattr(struct task_struct *p, char *name,
2479 void *value, size_t size)
2480{
2481 struct task_smack *tsp;
2482 struct task_smack *oldtsp;
2483 struct cred *new;
2484 char *newsmack;
2485
2486
2487
2488
2489
2490 if (p != current)
2491 return -EPERM;
2492
2493 if (!capable(CAP_MAC_ADMIN))
2494 return -EPERM;
2495
2496 if (value == NULL || size == 0 || size >= SMK_LABELLEN)
2497 return -EINVAL;
2498
2499 if (strcmp(name, "current") != 0)
2500 return -EINVAL;
2501
2502 newsmack = smk_import(value, size);
2503 if (newsmack == NULL)
2504 return -EINVAL;
2505
2506
2507
2508
2509 if (newsmack == smack_known_web.smk_known)
2510 return -EPERM;
2511
2512 oldtsp = p->cred->security;
2513 new = prepare_creds();
2514 if (new == NULL)
2515 return -ENOMEM;
2516 tsp = kzalloc(sizeof(struct task_smack), GFP_KERNEL);
2517 if (tsp == NULL) {
2518 kfree(new);
2519 return -ENOMEM;
2520 }
2521 tsp->smk_task = newsmack;
2522 tsp->smk_forked = oldtsp->smk_forked;
2523 new->security = tsp;
2524 commit_creds(new);
2525 return size;
2526}
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537static int smack_unix_stream_connect(struct sock *sock,
2538 struct sock *other, struct sock *newsk)
2539{
2540 struct socket_smack *ssp = sock->sk_security;
2541 struct socket_smack *osp = other->sk_security;
2542 struct smk_audit_info ad;
2543 int rc = 0;
2544
2545 smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_NET);
2546 smk_ad_setfield_u_net_sk(&ad, other);
2547
2548 if (!capable(CAP_MAC_OVERRIDE))
2549 rc = smk_access(ssp->smk_out, osp->smk_in, MAY_WRITE, &ad);
2550
2551 return rc;
2552}
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562static int smack_unix_may_send(struct socket *sock, struct socket *other)
2563{
2564 struct socket_smack *ssp = sock->sk->sk_security;
2565 struct socket_smack *osp = other->sk->sk_security;
2566 struct smk_audit_info ad;
2567 int rc = 0;
2568
2569 smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_NET);
2570 smk_ad_setfield_u_net_sk(&ad, other->sk);
2571
2572 if (!capable(CAP_MAC_OVERRIDE))
2573 rc = smk_access(ssp->smk_out, osp->smk_in, MAY_WRITE, &ad);
2574
2575 return rc;
2576}
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588static int smack_socket_sendmsg(struct socket *sock, struct msghdr *msg,
2589 int size)
2590{
2591 struct sockaddr_in *sip = (struct sockaddr_in *) msg->msg_name;
2592
2593
2594
2595
2596 if (sip == NULL || sip->sin_family != AF_INET)
2597 return 0;
2598
2599 return smack_netlabel_send(sock->sk, sip);
2600}
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610static void smack_from_secattr(struct netlbl_lsm_secattr *sap, char *sip)
2611{
2612 char smack[SMK_LABELLEN];
2613 char *sp;
2614 int pcat;
2615
2616 if ((sap->flags & NETLBL_SECATTR_MLS_LVL) != 0) {
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627 memset(smack, '\0', SMK_LABELLEN);
2628 if ((sap->flags & NETLBL_SECATTR_MLS_CAT) != 0)
2629 for (pcat = -1;;) {
2630 pcat = netlbl_secattr_catmap_walk(
2631 sap->attr.mls.cat, pcat + 1);
2632 if (pcat < 0)
2633 break;
2634 smack_catset_bit(pcat, smack);
2635 }
2636
2637
2638
2639
2640 if (sap->attr.mls.lvl == smack_cipso_direct) {
2641 memcpy(sip, smack, SMK_MAXLEN);
2642 return;
2643 }
2644
2645
2646
2647
2648 smack_from_cipso(sap->attr.mls.lvl, smack, sip);
2649 return;
2650 }
2651 if ((sap->flags & NETLBL_SECATTR_SECID) != 0) {
2652
2653
2654
2655 sp = smack_from_secid(sap->attr.secid);
2656
2657
2658
2659
2660
2661
2662
2663 BUG_ON(sp == NULL);
2664 strncpy(sip, sp, SMK_MAXLEN);
2665 return;
2666 }
2667
2668
2669
2670
2671
2672 strncpy(sip, smack_net_ambient, SMK_MAXLEN);
2673 return;
2674}
2675
2676
2677
2678
2679
2680
2681
2682
2683static int smack_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
2684{
2685 struct netlbl_lsm_secattr secattr;
2686 struct socket_smack *ssp = sk->sk_security;
2687 char smack[SMK_LABELLEN];
2688 char *csp;
2689 int rc;
2690 struct smk_audit_info ad;
2691 if (sk->sk_family != PF_INET && sk->sk_family != PF_INET6)
2692 return 0;
2693
2694
2695
2696
2697 netlbl_secattr_init(&secattr);
2698
2699 rc = netlbl_skbuff_getattr(skb, sk->sk_family, &secattr);
2700 if (rc == 0) {
2701 smack_from_secattr(&secattr, smack);
2702 csp = smack;
2703 } else
2704 csp = smack_net_ambient;
2705
2706 netlbl_secattr_destroy(&secattr);
2707
2708#ifdef CONFIG_AUDIT
2709 smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_NET);
2710 ad.a.u.net.family = sk->sk_family;
2711 ad.a.u.net.netif = skb->skb_iif;
2712 ipv4_skb_to_auditdata(skb, &ad.a, NULL);
2713#endif
2714
2715
2716
2717
2718
2719
2720 rc = smk_access(csp, ssp->smk_in, MAY_WRITE, &ad);
2721 if (rc != 0)
2722 netlbl_skbuff_err(skb, rc, 0);
2723 return rc;
2724}
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735static int smack_socket_getpeersec_stream(struct socket *sock,
2736 char __user *optval,
2737 int __user *optlen, unsigned len)
2738{
2739 struct socket_smack *ssp;
2740 int slen;
2741 int rc = 0;
2742
2743 ssp = sock->sk->sk_security;
2744 slen = strlen(ssp->smk_packet) + 1;
2745
2746 if (slen > len)
2747 rc = -ERANGE;
2748 else if (copy_to_user(optval, ssp->smk_packet, slen) != 0)
2749 rc = -EFAULT;
2750
2751 if (put_user(slen, optlen) != 0)
2752 rc = -EFAULT;
2753
2754 return rc;
2755}
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766static int smack_socket_getpeersec_dgram(struct socket *sock,
2767 struct sk_buff *skb, u32 *secid)
2768
2769{
2770 struct netlbl_lsm_secattr secattr;
2771 struct socket_smack *sp;
2772 char smack[SMK_LABELLEN];
2773 int family = PF_UNSPEC;
2774 u32 s = 0;
2775 int rc;
2776
2777 if (skb != NULL) {
2778 if (skb->protocol == htons(ETH_P_IP))
2779 family = PF_INET;
2780 else if (skb->protocol == htons(ETH_P_IPV6))
2781 family = PF_INET6;
2782 }
2783 if (family == PF_UNSPEC && sock != NULL)
2784 family = sock->sk->sk_family;
2785
2786 if (family == PF_UNIX) {
2787 sp = sock->sk->sk_security;
2788 s = smack_to_secid(sp->smk_out);
2789 } else if (family == PF_INET || family == PF_INET6) {
2790
2791
2792
2793 netlbl_secattr_init(&secattr);
2794 rc = netlbl_skbuff_getattr(skb, family, &secattr);
2795 if (rc == 0) {
2796 smack_from_secattr(&secattr, smack);
2797 s = smack_to_secid(smack);
2798 }
2799 netlbl_secattr_destroy(&secattr);
2800 }
2801 *secid = s;
2802 if (s == 0)
2803 return -EINVAL;
2804 return 0;
2805}
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815static void smack_sock_graft(struct sock *sk, struct socket *parent)
2816{
2817 struct socket_smack *ssp;
2818
2819 if (sk == NULL ||
2820 (sk->sk_family != PF_INET && sk->sk_family != PF_INET6))
2821 return;
2822
2823 ssp = sk->sk_security;
2824 ssp->smk_in = ssp->smk_out = smk_of_current();
2825
2826}
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837static int smack_inet_conn_request(struct sock *sk, struct sk_buff *skb,
2838 struct request_sock *req)
2839{
2840 u16 family = sk->sk_family;
2841 struct socket_smack *ssp = sk->sk_security;
2842 struct netlbl_lsm_secattr secattr;
2843 struct sockaddr_in addr;
2844 struct iphdr *hdr;
2845 char smack[SMK_LABELLEN];
2846 int rc;
2847 struct smk_audit_info ad;
2848
2849
2850 if (family == PF_INET6 && skb->protocol == htons(ETH_P_IP))
2851 family = PF_INET;
2852
2853 netlbl_secattr_init(&secattr);
2854 rc = netlbl_skbuff_getattr(skb, family, &secattr);
2855 if (rc == 0)
2856 smack_from_secattr(&secattr, smack);
2857 else
2858 strncpy(smack, smack_known_huh.smk_known, SMK_MAXLEN);
2859 netlbl_secattr_destroy(&secattr);
2860
2861#ifdef CONFIG_AUDIT
2862 smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_NET);
2863 ad.a.u.net.family = family;
2864 ad.a.u.net.netif = skb->skb_iif;
2865 ipv4_skb_to_auditdata(skb, &ad.a, NULL);
2866#endif
2867
2868
2869
2870
2871 rc = smk_access(smack, ssp->smk_in, MAY_WRITE, &ad);
2872 if (rc != 0)
2873 return rc;
2874
2875
2876
2877
2878
2879 req->peer_secid = smack_to_secid(smack);
2880
2881
2882
2883
2884
2885
2886 hdr = ip_hdr(skb);
2887 addr.sin_addr.s_addr = hdr->saddr;
2888 rcu_read_lock();
2889 if (smack_host_label(&addr) == NULL) {
2890 rcu_read_unlock();
2891 netlbl_secattr_init(&secattr);
2892 smack_to_secattr(smack, &secattr);
2893 rc = netlbl_req_setattr(req, &secattr);
2894 netlbl_secattr_destroy(&secattr);
2895 } else {
2896 rcu_read_unlock();
2897 netlbl_req_delattr(req);
2898 }
2899
2900 return rc;
2901}
2902
2903
2904
2905
2906
2907
2908
2909
2910static void smack_inet_csk_clone(struct sock *sk,
2911 const struct request_sock *req)
2912{
2913 struct socket_smack *ssp = sk->sk_security;
2914 char *smack;
2915
2916 if (req->peer_secid != 0) {
2917 smack = smack_from_secid(req->peer_secid);
2918 strncpy(ssp->smk_packet, smack, SMK_MAXLEN);
2919 } else
2920 ssp->smk_packet[0] = '\0';
2921}
2922
2923
2924
2925
2926
2927
2928
2929
2930#ifdef CONFIG_KEYS
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942static int smack_key_alloc(struct key *key, const struct cred *cred,
2943 unsigned long flags)
2944{
2945 key->security = smk_of_task(cred->security);
2946 return 0;
2947}
2948
2949
2950
2951
2952
2953
2954
2955static void smack_key_free(struct key *key)
2956{
2957 key->security = NULL;
2958}
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969static int smack_key_permission(key_ref_t key_ref,
2970 const struct cred *cred, key_perm_t perm)
2971{
2972 struct key *keyp;
2973 struct smk_audit_info ad;
2974 char *tsp = smk_of_task(cred->security);
2975
2976 keyp = key_ref_to_ptr(key_ref);
2977 if (keyp == NULL)
2978 return -EINVAL;
2979
2980
2981
2982
2983 if (keyp->security == NULL)
2984 return 0;
2985
2986
2987
2988 if (tsp == NULL)
2989 return -EACCES;
2990#ifdef CONFIG_AUDIT
2991 smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_KEY);
2992 ad.a.u.key_struct.key = keyp->serial;
2993 ad.a.u.key_struct.key_desc = keyp->description;
2994#endif
2995 return smk_access(tsp, keyp->security,
2996 MAY_READWRITE, &ad);
2997}
2998#endif
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013#ifdef CONFIG_AUDIT
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025static int smack_audit_rule_init(u32 field, u32 op, char *rulestr, void **vrule)
3026{
3027 char **rule = (char **)vrule;
3028 *rule = NULL;
3029
3030 if (field != AUDIT_SUBJ_USER && field != AUDIT_OBJ_USER)
3031 return -EINVAL;
3032
3033 if (op != Audit_equal && op != Audit_not_equal)
3034 return -EINVAL;
3035
3036 *rule = smk_import(rulestr, 0);
3037
3038 return 0;
3039}
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049static int smack_audit_rule_known(struct audit_krule *krule)
3050{
3051 struct audit_field *f;
3052 int i;
3053
3054 for (i = 0; i < krule->field_count; i++) {
3055 f = &krule->fields[i];
3056
3057 if (f->type == AUDIT_SUBJ_USER || f->type == AUDIT_OBJ_USER)
3058 return 1;
3059 }
3060
3061 return 0;
3062}
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075static int smack_audit_rule_match(u32 secid, u32 field, u32 op, void *vrule,
3076 struct audit_context *actx)
3077{
3078 char *smack;
3079 char *rule = vrule;
3080
3081 if (!rule) {
3082 audit_log(actx, GFP_KERNEL, AUDIT_SELINUX_ERR,
3083 "Smack: missing rule\n");
3084 return -ENOENT;
3085 }
3086
3087 if (field != AUDIT_SUBJ_USER && field != AUDIT_OBJ_USER)
3088 return 0;
3089
3090 smack = smack_from_secid(secid);
3091
3092
3093
3094
3095
3096
3097 if (op == Audit_equal)
3098 return (rule == smack);
3099 if (op == Audit_not_equal)
3100 return (rule != smack);
3101
3102 return 0;
3103}
3104
3105
3106
3107
3108
3109
3110
3111static void smack_audit_rule_free(void *vrule)
3112{
3113
3114}
3115
3116#endif
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126static int smack_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
3127{
3128 char *sp = smack_from_secid(secid);
3129
3130 if (secdata)
3131 *secdata = sp;
3132 *seclen = strlen(sp);
3133 return 0;
3134}
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144static int smack_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
3145{
3146 *secid = smack_to_secid(secdata);
3147 return 0;
3148}
3149
3150
3151
3152
3153
3154
3155
3156
3157static void smack_release_secctx(char *secdata, u32 seclen)
3158{
3159}
3160
3161static int smack_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen)
3162{
3163 return smack_inode_setsecurity(inode, XATTR_SMACK_SUFFIX, ctx, ctxlen, 0);
3164}
3165
3166static int smack_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen)
3167{
3168 return __vfs_setxattr_noperm(dentry, XATTR_NAME_SMACK, ctx, ctxlen, 0);
3169}
3170
3171static int smack_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen)
3172{
3173 int len = 0;
3174 len = smack_inode_getsecurity(inode, XATTR_SMACK_SUFFIX, ctx, true);
3175
3176 if (len < 0)
3177 return len;
3178 *ctxlen = len;
3179 return 0;
3180}
3181
3182struct security_operations smack_ops = {
3183 .name = "smack",
3184
3185 .ptrace_access_check = smack_ptrace_access_check,
3186 .ptrace_traceme = smack_ptrace_traceme,
3187 .syslog = smack_syslog,
3188
3189 .sb_alloc_security = smack_sb_alloc_security,
3190 .sb_free_security = smack_sb_free_security,
3191 .sb_copy_data = smack_sb_copy_data,
3192 .sb_kern_mount = smack_sb_kern_mount,
3193 .sb_statfs = smack_sb_statfs,
3194 .sb_mount = smack_sb_mount,
3195 .sb_umount = smack_sb_umount,
3196
3197 .bprm_set_creds = smack_bprm_set_creds,
3198
3199 .inode_alloc_security = smack_inode_alloc_security,
3200 .inode_free_security = smack_inode_free_security,
3201 .inode_init_security = smack_inode_init_security,
3202 .inode_link = smack_inode_link,
3203 .inode_unlink = smack_inode_unlink,
3204 .inode_rmdir = smack_inode_rmdir,
3205 .inode_rename = smack_inode_rename,
3206 .inode_permission = smack_inode_permission,
3207 .inode_setattr = smack_inode_setattr,
3208 .inode_getattr = smack_inode_getattr,
3209 .inode_setxattr = smack_inode_setxattr,
3210 .inode_post_setxattr = smack_inode_post_setxattr,
3211 .inode_getxattr = smack_inode_getxattr,
3212 .inode_removexattr = smack_inode_removexattr,
3213 .inode_getsecurity = smack_inode_getsecurity,
3214 .inode_setsecurity = smack_inode_setsecurity,
3215 .inode_listsecurity = smack_inode_listsecurity,
3216 .inode_getsecid = smack_inode_getsecid,
3217
3218 .file_permission = smack_file_permission,
3219 .file_alloc_security = smack_file_alloc_security,
3220 .file_free_security = smack_file_free_security,
3221 .file_ioctl = smack_file_ioctl,
3222 .file_lock = smack_file_lock,
3223 .file_fcntl = smack_file_fcntl,
3224 .file_set_fowner = smack_file_set_fowner,
3225 .file_send_sigiotask = smack_file_send_sigiotask,
3226 .file_receive = smack_file_receive,
3227
3228 .cred_alloc_blank = smack_cred_alloc_blank,
3229 .cred_free = smack_cred_free,
3230 .cred_prepare = smack_cred_prepare,
3231 .cred_transfer = smack_cred_transfer,
3232 .kernel_act_as = smack_kernel_act_as,
3233 .kernel_create_files_as = smack_kernel_create_files_as,
3234 .task_setpgid = smack_task_setpgid,
3235 .task_getpgid = smack_task_getpgid,
3236 .task_getsid = smack_task_getsid,
3237 .task_getsecid = smack_task_getsecid,
3238 .task_setnice = smack_task_setnice,
3239 .task_setioprio = smack_task_setioprio,
3240 .task_getioprio = smack_task_getioprio,
3241 .task_setscheduler = smack_task_setscheduler,
3242 .task_getscheduler = smack_task_getscheduler,
3243 .task_movememory = smack_task_movememory,
3244 .task_kill = smack_task_kill,
3245 .task_wait = smack_task_wait,
3246 .task_to_inode = smack_task_to_inode,
3247
3248 .ipc_permission = smack_ipc_permission,
3249 .ipc_getsecid = smack_ipc_getsecid,
3250
3251 .msg_msg_alloc_security = smack_msg_msg_alloc_security,
3252 .msg_msg_free_security = smack_msg_msg_free_security,
3253
3254 .msg_queue_alloc_security = smack_msg_queue_alloc_security,
3255 .msg_queue_free_security = smack_msg_queue_free_security,
3256 .msg_queue_associate = smack_msg_queue_associate,
3257 .msg_queue_msgctl = smack_msg_queue_msgctl,
3258 .msg_queue_msgsnd = smack_msg_queue_msgsnd,
3259 .msg_queue_msgrcv = smack_msg_queue_msgrcv,
3260
3261 .shm_alloc_security = smack_shm_alloc_security,
3262 .shm_free_security = smack_shm_free_security,
3263 .shm_associate = smack_shm_associate,
3264 .shm_shmctl = smack_shm_shmctl,
3265 .shm_shmat = smack_shm_shmat,
3266
3267 .sem_alloc_security = smack_sem_alloc_security,
3268 .sem_free_security = smack_sem_free_security,
3269 .sem_associate = smack_sem_associate,
3270 .sem_semctl = smack_sem_semctl,
3271 .sem_semop = smack_sem_semop,
3272
3273 .d_instantiate = smack_d_instantiate,
3274
3275 .getprocattr = smack_getprocattr,
3276 .setprocattr = smack_setprocattr,
3277
3278 .unix_stream_connect = smack_unix_stream_connect,
3279 .unix_may_send = smack_unix_may_send,
3280
3281 .socket_post_create = smack_socket_post_create,
3282 .socket_connect = smack_socket_connect,
3283 .socket_sendmsg = smack_socket_sendmsg,
3284 .socket_sock_rcv_skb = smack_socket_sock_rcv_skb,
3285 .socket_getpeersec_stream = smack_socket_getpeersec_stream,
3286 .socket_getpeersec_dgram = smack_socket_getpeersec_dgram,
3287 .sk_alloc_security = smack_sk_alloc_security,
3288 .sk_free_security = smack_sk_free_security,
3289 .sock_graft = smack_sock_graft,
3290 .inet_conn_request = smack_inet_conn_request,
3291 .inet_csk_clone = smack_inet_csk_clone,
3292
3293
3294#ifdef CONFIG_KEYS
3295 .key_alloc = smack_key_alloc,
3296 .key_free = smack_key_free,
3297 .key_permission = smack_key_permission,
3298#endif
3299
3300
3301#ifdef CONFIG_AUDIT
3302 .audit_rule_init = smack_audit_rule_init,
3303 .audit_rule_known = smack_audit_rule_known,
3304 .audit_rule_match = smack_audit_rule_match,
3305 .audit_rule_free = smack_audit_rule_free,
3306#endif
3307
3308 .secid_to_secctx = smack_secid_to_secctx,
3309 .secctx_to_secid = smack_secctx_to_secid,
3310 .release_secctx = smack_release_secctx,
3311 .inode_notifysecctx = smack_inode_notifysecctx,
3312 .inode_setsecctx = smack_inode_setsecctx,
3313 .inode_getsecctx = smack_inode_getsecctx,
3314};
3315
3316
3317static __init void init_smack_know_list(void)
3318{
3319 list_add(&smack_known_huh.list, &smack_known_list);
3320 list_add(&smack_known_hat.list, &smack_known_list);
3321 list_add(&smack_known_star.list, &smack_known_list);
3322 list_add(&smack_known_floor.list, &smack_known_list);
3323 list_add(&smack_known_invalid.list, &smack_known_list);
3324 list_add(&smack_known_web.list, &smack_known_list);
3325}
3326
3327
3328
3329
3330
3331
3332static __init int smack_init(void)
3333{
3334 struct cred *cred;
3335 struct task_smack *tsp;
3336
3337 tsp = kzalloc(sizeof(struct task_smack), GFP_KERNEL);
3338 if (tsp == NULL)
3339 return -ENOMEM;
3340
3341 if (!security_module_enable(&smack_ops)) {
3342 kfree(tsp);
3343 return 0;
3344 }
3345
3346 printk(KERN_INFO "Smack: Initializing.\n");
3347
3348
3349
3350
3351 cred = (struct cred *) current->cred;
3352 tsp->smk_forked = smack_known_floor.smk_known;
3353 tsp->smk_task = smack_known_floor.smk_known;
3354 cred->security = tsp;
3355
3356
3357 init_smack_know_list();
3358
3359
3360
3361 spin_lock_init(&smack_known_huh.smk_cipsolock);
3362 spin_lock_init(&smack_known_hat.smk_cipsolock);
3363 spin_lock_init(&smack_known_star.smk_cipsolock);
3364 spin_lock_init(&smack_known_floor.smk_cipsolock);
3365 spin_lock_init(&smack_known_invalid.smk_cipsolock);
3366
3367
3368
3369
3370 if (register_security(&smack_ops))
3371 panic("smack: Unable to register with kernel.\n");
3372
3373 return 0;
3374}
3375
3376
3377
3378
3379
3380security_initcall(smack_init);
3381