1
2
3
4
5
6
7
8
9
10
11
12
13
14
15#include <linux/kernel.h>
16#include <linux/vmalloc.h>
17#include <linux/security.h>
18#include <linux/mutex.h>
19#include <linux/slab.h>
20#include <net/net_namespace.h>
21#include <net/cipso_ipv4.h>
22#include <linux/seq_file.h>
23#include <linux/ctype.h>
24#include <linux/audit.h>
25#include <linux/magic.h>
26#include "smack.h"
27
28#define BEBITS (sizeof(__be32) * 8)
29
30
31
32
33enum smk_inos {
34 SMK_ROOT_INO = 2,
35 SMK_LOAD = 3,
36 SMK_CIPSO = 4,
37 SMK_DOI = 5,
38 SMK_DIRECT = 6,
39 SMK_AMBIENT = 7,
40 SMK_NET4ADDR = 8,
41 SMK_ONLYCAP = 9,
42 SMK_LOGGING = 10,
43 SMK_LOAD_SELF = 11,
44 SMK_ACCESSES = 12,
45 SMK_MAPPED = 13,
46 SMK_LOAD2 = 14,
47 SMK_LOAD_SELF2 = 15,
48 SMK_ACCESS2 = 16,
49 SMK_CIPSO2 = 17,
50 SMK_REVOKE_SUBJ = 18,
51 SMK_CHANGE_RULE = 19,
52 SMK_SYSLOG = 20,
53 SMK_PTRACE = 21,
54#ifdef CONFIG_SECURITY_SMACK_BRINGUP
55 SMK_UNCONFINED = 22,
56#endif
57#if IS_ENABLED(CONFIG_IPV6)
58 SMK_NET6ADDR = 23,
59#endif
60 SMK_RELABEL_SELF = 24,
61};
62
63
64
65
66static DEFINE_MUTEX(smack_cipso_lock);
67static DEFINE_MUTEX(smack_ambient_lock);
68static DEFINE_MUTEX(smk_net4addr_lock);
69#if IS_ENABLED(CONFIG_IPV6)
70static DEFINE_MUTEX(smk_net6addr_lock);
71#endif
72
73
74
75
76
77
78struct smack_known *smack_net_ambient;
79
80
81
82
83
84
85int smack_cipso_direct = SMACK_CIPSO_DIRECT_DEFAULT;
86
87
88
89
90
91
92int smack_cipso_mapped = SMACK_CIPSO_MAPPED_DEFAULT;
93
94#ifdef CONFIG_SECURITY_SMACK_BRINGUP
95
96
97
98
99
100
101struct smack_known *smack_unconfined;
102#endif
103
104
105
106
107
108struct smack_known *smack_syslog_label;
109
110
111
112
113
114
115
116
117int smack_ptrace_rule = SMACK_PTRACE_DEFAULT;
118
119
120
121
122
123
124
125LIST_HEAD(smk_net4addr_list);
126#if IS_ENABLED(CONFIG_IPV6)
127LIST_HEAD(smk_net6addr_list);
128#endif
129
130
131
132
133struct smack_parsed_rule {
134 struct smack_known *smk_subject;
135 struct smack_known *smk_object;
136 int smk_access1;
137 int smk_access2;
138};
139
140static int smk_cipso_doi_value = SMACK_CIPSO_DOI_DEFAULT;
141
142
143
144
145
146
147
148#define SMK_DIGITLEN 4
149#define SMK_CIPSOMIN (SMK_LABELLEN + 2 * SMK_DIGITLEN)
150#define SMK_CIPSOMAX (SMK_CIPSOMIN + SMACK_CIPSO_MAXCATNUM * SMK_DIGITLEN)
151
152
153
154
155
156
157
158#define SMK_OACCESS "rwxa"
159#define SMK_ACCESS "rwxatl"
160#define SMK_OACCESSLEN (sizeof(SMK_OACCESS) - 1)
161#define SMK_ACCESSLEN (sizeof(SMK_ACCESS) - 1)
162#define SMK_OLOADLEN (SMK_LABELLEN + SMK_LABELLEN + SMK_OACCESSLEN)
163#define SMK_LOADLEN (SMK_LABELLEN + SMK_LABELLEN + SMK_ACCESSLEN)
164
165
166
167
168
169static inline void smack_catset_bit(unsigned int cat, char *catsetp)
170{
171 if (cat == 0 || cat > (SMK_CIPSOLEN * 8))
172 return;
173
174 catsetp[(cat - 1) / 8] |= 0x80 >> ((cat - 1) % 8);
175}
176
177
178
179
180
181static void smk_netlabel_audit_set(struct netlbl_audit *nap)
182{
183 struct smack_known *skp = smk_of_current();
184
185 nap->loginuid = audit_get_loginuid(current);
186 nap->sessionid = audit_get_sessionid(current);
187 nap->secid = skp->smk_secid;
188}
189
190
191
192
193
194#define SMK_NETLBLADDRMIN 9
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210static int smk_set_access(struct smack_parsed_rule *srp,
211 struct list_head *rule_list,
212 struct mutex *rule_lock)
213{
214 struct smack_rule *sp;
215 int found = 0;
216 int rc = 0;
217
218 mutex_lock(rule_lock);
219
220
221
222
223
224 list_for_each_entry_rcu(sp, rule_list, list) {
225 if (sp->smk_object == srp->smk_object &&
226 sp->smk_subject == srp->smk_subject) {
227 found = 1;
228 sp->smk_access |= srp->smk_access1;
229 sp->smk_access &= ~srp->smk_access2;
230 break;
231 }
232 }
233
234 if (found == 0) {
235 sp = kmem_cache_zalloc(smack_rule_cache, GFP_KERNEL);
236 if (sp == NULL) {
237 rc = -ENOMEM;
238 goto out;
239 }
240
241 sp->smk_subject = srp->smk_subject;
242 sp->smk_object = srp->smk_object;
243 sp->smk_access = srp->smk_access1 & ~srp->smk_access2;
244
245 list_add_rcu(&sp->list, rule_list);
246 }
247
248out:
249 mutex_unlock(rule_lock);
250 return rc;
251}
252
253
254
255
256
257
258
259static int smk_perm_from_str(const char *string)
260{
261 int perm = 0;
262 const char *cp;
263
264 for (cp = string; ; cp++)
265 switch (*cp) {
266 case '-':
267 break;
268 case 'r':
269 case 'R':
270 perm |= MAY_READ;
271 break;
272 case 'w':
273 case 'W':
274 perm |= MAY_WRITE;
275 break;
276 case 'x':
277 case 'X':
278 perm |= MAY_EXEC;
279 break;
280 case 'a':
281 case 'A':
282 perm |= MAY_APPEND;
283 break;
284 case 't':
285 case 'T':
286 perm |= MAY_TRANSMUTE;
287 break;
288 case 'l':
289 case 'L':
290 perm |= MAY_LOCK;
291 break;
292 case 'b':
293 case 'B':
294 perm |= MAY_BRINGUP;
295 break;
296 default:
297 return perm;
298 }
299}
300
301
302
303
304
305
306
307
308
309
310
311
312
313static int smk_fill_rule(const char *subject, const char *object,
314 const char *access1, const char *access2,
315 struct smack_parsed_rule *rule, int import,
316 int len)
317{
318 const char *cp;
319 struct smack_known *skp;
320
321 if (import) {
322 rule->smk_subject = smk_import_entry(subject, len);
323 if (IS_ERR(rule->smk_subject))
324 return PTR_ERR(rule->smk_subject);
325
326 rule->smk_object = smk_import_entry(object, len);
327 if (IS_ERR(rule->smk_object))
328 return PTR_ERR(rule->smk_object);
329 } else {
330 cp = smk_parse_smack(subject, len);
331 if (IS_ERR(cp))
332 return PTR_ERR(cp);
333 skp = smk_find_entry(cp);
334 kfree(cp);
335 if (skp == NULL)
336 return -ENOENT;
337 rule->smk_subject = skp;
338
339 cp = smk_parse_smack(object, len);
340 if (IS_ERR(cp))
341 return PTR_ERR(cp);
342 skp = smk_find_entry(cp);
343 kfree(cp);
344 if (skp == NULL)
345 return -ENOENT;
346 rule->smk_object = skp;
347 }
348
349 rule->smk_access1 = smk_perm_from_str(access1);
350 if (access2)
351 rule->smk_access2 = smk_perm_from_str(access2);
352 else
353 rule->smk_access2 = ~rule->smk_access1;
354
355 return 0;
356}
357
358
359
360
361
362
363
364
365
366static int smk_parse_rule(const char *data, struct smack_parsed_rule *rule,
367 int import)
368{
369 int rc;
370
371 rc = smk_fill_rule(data, data + SMK_LABELLEN,
372 data + SMK_LABELLEN + SMK_LABELLEN, NULL, rule,
373 import, SMK_LABELLEN);
374 return rc;
375}
376
377
378
379
380
381
382
383
384
385
386static ssize_t smk_parse_long_rule(char *data, struct smack_parsed_rule *rule,
387 int import, int tokens)
388{
389 ssize_t cnt = 0;
390 char *tok[4];
391 int rc;
392 int i;
393
394
395
396
397 for (i = 0; i < tokens; ++i) {
398 while (isspace(data[cnt]))
399 data[cnt++] = '\0';
400
401 if (data[cnt] == '\0')
402
403 return -EINVAL;
404
405 tok[i] = data + cnt;
406
407 while (data[cnt] && !isspace(data[cnt]))
408 ++cnt;
409 }
410 while (isspace(data[cnt]))
411 data[cnt++] = '\0';
412
413 while (i < 4)
414 tok[i++] = NULL;
415
416 rc = smk_fill_rule(tok[0], tok[1], tok[2], tok[3], rule, import, 0);
417 return rc == 0 ? cnt : rc;
418}
419
420#define SMK_FIXED24_FMT 0
421#define SMK_LONG_FMT 1
422#define SMK_CHANGE_FMT 2
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442static ssize_t smk_write_rules_list(struct file *file, const char __user *buf,
443 size_t count, loff_t *ppos,
444 struct list_head *rule_list,
445 struct mutex *rule_lock, int format)
446{
447 struct smack_parsed_rule rule;
448 char *data;
449 int rc;
450 int trunc = 0;
451 int tokens;
452 ssize_t cnt = 0;
453
454
455
456
457
458 if (*ppos != 0)
459 return -EINVAL;
460
461 if (format == SMK_FIXED24_FMT) {
462
463
464
465 if (count < SMK_OLOADLEN || count > SMK_LOADLEN)
466 return -EINVAL;
467 } else {
468 if (count >= PAGE_SIZE) {
469 count = PAGE_SIZE - 1;
470 trunc = 1;
471 }
472 }
473
474 data = memdup_user_nul(buf, count);
475 if (IS_ERR(data))
476 return PTR_ERR(data);
477
478
479
480
481
482 if (trunc) {
483 while (count > 0 && (data[count - 1] != '\n'))
484 --count;
485 if (count == 0) {
486 rc = -EINVAL;
487 goto out;
488 }
489 }
490
491 data[count] = '\0';
492 tokens = (format == SMK_CHANGE_FMT ? 4 : 3);
493 while (cnt < count) {
494 if (format == SMK_FIXED24_FMT) {
495 rc = smk_parse_rule(data, &rule, 1);
496 if (rc < 0)
497 goto out;
498 cnt = count;
499 } else {
500 rc = smk_parse_long_rule(data + cnt, &rule, 1, tokens);
501 if (rc < 0)
502 goto out;
503 if (rc == 0) {
504 rc = -EINVAL;
505 goto out;
506 }
507 cnt += rc;
508 }
509
510 if (rule_list == NULL)
511 rc = smk_set_access(&rule, &rule.smk_subject->smk_rules,
512 &rule.smk_subject->smk_rules_lock);
513 else
514 rc = smk_set_access(&rule, rule_list, rule_lock);
515
516 if (rc)
517 goto out;
518 }
519
520 rc = cnt;
521out:
522 kfree(data);
523 return rc;
524}
525
526
527
528
529
530static void *smk_seq_start(struct seq_file *s, loff_t *pos,
531 struct list_head *head)
532{
533 struct list_head *list;
534 int i = *pos;
535
536 rcu_read_lock();
537 for (list = rcu_dereference(list_next_rcu(head));
538 list != head;
539 list = rcu_dereference(list_next_rcu(list))) {
540 if (i-- == 0)
541 return list;
542 }
543
544 return NULL;
545}
546
547static void *smk_seq_next(struct seq_file *s, void *v, loff_t *pos,
548 struct list_head *head)
549{
550 struct list_head *list = v;
551
552 ++*pos;
553 list = rcu_dereference(list_next_rcu(list));
554
555 return (list == head) ? NULL : list;
556}
557
558static void smk_seq_stop(struct seq_file *s, void *v)
559{
560 rcu_read_unlock();
561}
562
563static void smk_rule_show(struct seq_file *s, struct smack_rule *srp, int max)
564{
565
566
567
568
569
570
571 if (strlen(srp->smk_subject->smk_known) >= max ||
572 strlen(srp->smk_object->smk_known) >= max)
573 return;
574
575 if (srp->smk_access == 0)
576 return;
577
578 seq_printf(s, "%s %s",
579 srp->smk_subject->smk_known,
580 srp->smk_object->smk_known);
581
582 seq_putc(s, ' ');
583
584 if (srp->smk_access & MAY_READ)
585 seq_putc(s, 'r');
586 if (srp->smk_access & MAY_WRITE)
587 seq_putc(s, 'w');
588 if (srp->smk_access & MAY_EXEC)
589 seq_putc(s, 'x');
590 if (srp->smk_access & MAY_APPEND)
591 seq_putc(s, 'a');
592 if (srp->smk_access & MAY_TRANSMUTE)
593 seq_putc(s, 't');
594 if (srp->smk_access & MAY_LOCK)
595 seq_putc(s, 'l');
596 if (srp->smk_access & MAY_BRINGUP)
597 seq_putc(s, 'b');
598
599 seq_putc(s, '\n');
600}
601
602
603
604
605
606static void *load2_seq_start(struct seq_file *s, loff_t *pos)
607{
608 return smk_seq_start(s, pos, &smack_known_list);
609}
610
611static void *load2_seq_next(struct seq_file *s, void *v, loff_t *pos)
612{
613 return smk_seq_next(s, v, pos, &smack_known_list);
614}
615
616static int load_seq_show(struct seq_file *s, void *v)
617{
618 struct list_head *list = v;
619 struct smack_rule *srp;
620 struct smack_known *skp =
621 list_entry_rcu(list, struct smack_known, list);
622
623 list_for_each_entry_rcu(srp, &skp->smk_rules, list)
624 smk_rule_show(s, srp, SMK_LABELLEN);
625
626 return 0;
627}
628
629static const struct seq_operations load_seq_ops = {
630 .start = load2_seq_start,
631 .next = load2_seq_next,
632 .show = load_seq_show,
633 .stop = smk_seq_stop,
634};
635
636
637
638
639
640
641
642
643static int smk_open_load(struct inode *inode, struct file *file)
644{
645 return seq_open(file, &load_seq_ops);
646}
647
648
649
650
651
652
653
654
655
656static ssize_t smk_write_load(struct file *file, const char __user *buf,
657 size_t count, loff_t *ppos)
658{
659
660
661
662
663
664 if (!smack_privileged(CAP_MAC_ADMIN))
665 return -EPERM;
666
667 return smk_write_rules_list(file, buf, count, ppos, NULL, NULL,
668 SMK_FIXED24_FMT);
669}
670
671static const struct file_operations smk_load_ops = {
672 .open = smk_open_load,
673 .read = seq_read,
674 .llseek = seq_lseek,
675 .write = smk_write_load,
676 .release = seq_release,
677};
678
679
680
681
682static void smk_cipso_doi(void)
683{
684 int rc;
685 struct cipso_v4_doi *doip;
686 struct netlbl_audit nai;
687
688 smk_netlabel_audit_set(&nai);
689
690 rc = netlbl_cfg_map_del(NULL, PF_INET, NULL, NULL, &nai);
691 if (rc != 0)
692 printk(KERN_WARNING "%s:%d remove rc = %d\n",
693 __func__, __LINE__, rc);
694
695 doip = kmalloc(sizeof(struct cipso_v4_doi), GFP_KERNEL);
696 if (doip == NULL)
697 panic("smack: Failed to initialize cipso DOI.\n");
698 doip->map.std = NULL;
699 doip->doi = smk_cipso_doi_value;
700 doip->type = CIPSO_V4_MAP_PASS;
701 doip->tags[0] = CIPSO_V4_TAG_RBITMAP;
702 for (rc = 1; rc < CIPSO_V4_TAG_MAXCNT; rc++)
703 doip->tags[rc] = CIPSO_V4_TAG_INVALID;
704
705 rc = netlbl_cfg_cipsov4_add(doip, &nai);
706 if (rc != 0) {
707 printk(KERN_WARNING "%s:%d cipso add rc = %d\n",
708 __func__, __LINE__, rc);
709 kfree(doip);
710 return;
711 }
712 rc = netlbl_cfg_cipsov4_map_add(doip->doi, NULL, NULL, NULL, &nai);
713 if (rc != 0) {
714 printk(KERN_WARNING "%s:%d map add rc = %d\n",
715 __func__, __LINE__, rc);
716 kfree(doip);
717 return;
718 }
719}
720
721
722
723
724
725static void smk_unlbl_ambient(char *oldambient)
726{
727 int rc;
728 struct netlbl_audit nai;
729
730 smk_netlabel_audit_set(&nai);
731
732 if (oldambient != NULL) {
733 rc = netlbl_cfg_map_del(oldambient, PF_INET, NULL, NULL, &nai);
734 if (rc != 0)
735 printk(KERN_WARNING "%s:%d remove rc = %d\n",
736 __func__, __LINE__, rc);
737 }
738 if (smack_net_ambient == NULL)
739 smack_net_ambient = &smack_known_floor;
740
741 rc = netlbl_cfg_unlbl_map_add(smack_net_ambient->smk_known, PF_INET,
742 NULL, NULL, &nai);
743 if (rc != 0)
744 printk(KERN_WARNING "%s:%d add rc = %d\n",
745 __func__, __LINE__, rc);
746}
747
748
749
750
751
752static void *cipso_seq_start(struct seq_file *s, loff_t *pos)
753{
754 return smk_seq_start(s, pos, &smack_known_list);
755}
756
757static void *cipso_seq_next(struct seq_file *s, void *v, loff_t *pos)
758{
759 return smk_seq_next(s, v, pos, &smack_known_list);
760}
761
762
763
764
765
766static int cipso_seq_show(struct seq_file *s, void *v)
767{
768 struct list_head *list = v;
769 struct smack_known *skp =
770 list_entry_rcu(list, struct smack_known, list);
771 struct netlbl_lsm_catmap *cmp = skp->smk_netlabel.attr.mls.cat;
772 char sep = '/';
773 int i;
774
775
776
777
778
779
780
781
782
783 if (strlen(skp->smk_known) >= SMK_LABELLEN)
784 return 0;
785
786 seq_printf(s, "%s %3d", skp->smk_known, skp->smk_netlabel.attr.mls.lvl);
787
788 for (i = netlbl_catmap_walk(cmp, 0); i >= 0;
789 i = netlbl_catmap_walk(cmp, i + 1)) {
790 seq_printf(s, "%c%d", sep, i);
791 sep = ',';
792 }
793
794 seq_putc(s, '\n');
795
796 return 0;
797}
798
799static const struct seq_operations cipso_seq_ops = {
800 .start = cipso_seq_start,
801 .next = cipso_seq_next,
802 .show = cipso_seq_show,
803 .stop = smk_seq_stop,
804};
805
806
807
808
809
810
811
812
813
814static int smk_open_cipso(struct inode *inode, struct file *file)
815{
816 return seq_open(file, &cipso_seq_ops);
817}
818
819
820
821
822
823
824
825
826
827
828
829
830static ssize_t smk_set_cipso(struct file *file, const char __user *buf,
831 size_t count, loff_t *ppos, int format)
832{
833 struct smack_known *skp;
834 struct netlbl_lsm_secattr ncats;
835 char mapcatset[SMK_CIPSOLEN];
836 int maplevel;
837 unsigned int cat;
838 int catlen;
839 ssize_t rc = -EINVAL;
840 char *data = NULL;
841 char *rule;
842 int ret;
843 int i;
844
845
846
847
848
849
850 if (!smack_privileged(CAP_MAC_ADMIN))
851 return -EPERM;
852 if (*ppos != 0)
853 return -EINVAL;
854 if (format == SMK_FIXED24_FMT &&
855 (count < SMK_CIPSOMIN || count > SMK_CIPSOMAX))
856 return -EINVAL;
857
858 data = memdup_user_nul(buf, count);
859 if (IS_ERR(data))
860 return PTR_ERR(data);
861
862 rule = data;
863
864
865
866
867 mutex_lock(&smack_cipso_lock);
868
869 skp = smk_import_entry(rule, 0);
870 if (IS_ERR(skp)) {
871 rc = PTR_ERR(skp);
872 goto out;
873 }
874
875 if (format == SMK_FIXED24_FMT)
876 rule += SMK_LABELLEN;
877 else
878 rule += strlen(skp->smk_known) + 1;
879
880 ret = sscanf(rule, "%d", &maplevel);
881 if (ret != 1 || maplevel > SMACK_CIPSO_MAXLEVEL)
882 goto out;
883
884 rule += SMK_DIGITLEN;
885 ret = sscanf(rule, "%d", &catlen);
886 if (ret != 1 || catlen > SMACK_CIPSO_MAXCATNUM)
887 goto out;
888
889 if (format == SMK_FIXED24_FMT &&
890 count != (SMK_CIPSOMIN + catlen * SMK_DIGITLEN))
891 goto out;
892
893 memset(mapcatset, 0, sizeof(mapcatset));
894
895 for (i = 0; i < catlen; i++) {
896 rule += SMK_DIGITLEN;
897 ret = sscanf(rule, "%u", &cat);
898 if (ret != 1 || cat > SMACK_CIPSO_MAXCATNUM)
899 goto out;
900
901 smack_catset_bit(cat, mapcatset);
902 }
903
904 rc = smk_netlbl_mls(maplevel, mapcatset, &ncats, SMK_CIPSOLEN);
905 if (rc >= 0) {
906 netlbl_catmap_free(skp->smk_netlabel.attr.mls.cat);
907 skp->smk_netlabel.attr.mls.cat = ncats.attr.mls.cat;
908 skp->smk_netlabel.attr.mls.lvl = ncats.attr.mls.lvl;
909 rc = count;
910 }
911
912out:
913 mutex_unlock(&smack_cipso_lock);
914 kfree(data);
915 return rc;
916}
917
918
919
920
921
922
923
924
925
926
927
928static ssize_t smk_write_cipso(struct file *file, const char __user *buf,
929 size_t count, loff_t *ppos)
930{
931 return smk_set_cipso(file, buf, count, ppos, SMK_FIXED24_FMT);
932}
933
934static const struct file_operations smk_cipso_ops = {
935 .open = smk_open_cipso,
936 .read = seq_read,
937 .llseek = seq_lseek,
938 .write = smk_write_cipso,
939 .release = seq_release,
940};
941
942
943
944
945
946
947
948
949
950static int cipso2_seq_show(struct seq_file *s, void *v)
951{
952 struct list_head *list = v;
953 struct smack_known *skp =
954 list_entry_rcu(list, struct smack_known, list);
955 struct netlbl_lsm_catmap *cmp = skp->smk_netlabel.attr.mls.cat;
956 char sep = '/';
957 int i;
958
959 seq_printf(s, "%s %3d", skp->smk_known, skp->smk_netlabel.attr.mls.lvl);
960
961 for (i = netlbl_catmap_walk(cmp, 0); i >= 0;
962 i = netlbl_catmap_walk(cmp, i + 1)) {
963 seq_printf(s, "%c%d", sep, i);
964 sep = ',';
965 }
966
967 seq_putc(s, '\n');
968
969 return 0;
970}
971
972static const struct seq_operations cipso2_seq_ops = {
973 .start = cipso_seq_start,
974 .next = cipso_seq_next,
975 .show = cipso2_seq_show,
976 .stop = smk_seq_stop,
977};
978
979
980
981
982
983
984
985
986
987static int smk_open_cipso2(struct inode *inode, struct file *file)
988{
989 return seq_open(file, &cipso2_seq_ops);
990}
991
992
993
994
995
996
997
998
999
1000
1001
1002static ssize_t smk_write_cipso2(struct file *file, const char __user *buf,
1003 size_t count, loff_t *ppos)
1004{
1005 return smk_set_cipso(file, buf, count, ppos, SMK_LONG_FMT);
1006}
1007
1008static const struct file_operations smk_cipso2_ops = {
1009 .open = smk_open_cipso2,
1010 .read = seq_read,
1011 .llseek = seq_lseek,
1012 .write = smk_write_cipso2,
1013 .release = seq_release,
1014};
1015
1016
1017
1018
1019
1020static void *net4addr_seq_start(struct seq_file *s, loff_t *pos)
1021{
1022 return smk_seq_start(s, pos, &smk_net4addr_list);
1023}
1024
1025static void *net4addr_seq_next(struct seq_file *s, void *v, loff_t *pos)
1026{
1027 return smk_seq_next(s, v, pos, &smk_net4addr_list);
1028}
1029
1030
1031
1032
1033static int net4addr_seq_show(struct seq_file *s, void *v)
1034{
1035 struct list_head *list = v;
1036 struct smk_net4addr *skp =
1037 list_entry_rcu(list, struct smk_net4addr, list);
1038 char *kp = SMACK_CIPSO_OPTION;
1039
1040 if (skp->smk_label != NULL)
1041 kp = skp->smk_label->smk_known;
1042 seq_printf(s, "%pI4/%d %s\n", &skp->smk_host.s_addr,
1043 skp->smk_masks, kp);
1044
1045 return 0;
1046}
1047
1048static const struct seq_operations net4addr_seq_ops = {
1049 .start = net4addr_seq_start,
1050 .next = net4addr_seq_next,
1051 .show = net4addr_seq_show,
1052 .stop = smk_seq_stop,
1053};
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063static int smk_open_net4addr(struct inode *inode, struct file *file)
1064{
1065 return seq_open(file, &net4addr_seq_ops);
1066}
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077static void smk_net4addr_insert(struct smk_net4addr *new)
1078{
1079 struct smk_net4addr *m;
1080 struct smk_net4addr *m_next;
1081
1082 if (list_empty(&smk_net4addr_list)) {
1083 list_add_rcu(&new->list, &smk_net4addr_list);
1084 return;
1085 }
1086
1087 m = list_entry_rcu(smk_net4addr_list.next,
1088 struct smk_net4addr, list);
1089
1090
1091 if (new->smk_masks > m->smk_masks) {
1092 list_add_rcu(&new->list, &smk_net4addr_list);
1093 return;
1094 }
1095
1096 list_for_each_entry_rcu(m, &smk_net4addr_list, list) {
1097 if (list_is_last(&m->list, &smk_net4addr_list)) {
1098 list_add_rcu(&new->list, &m->list);
1099 return;
1100 }
1101 m_next = list_entry_rcu(m->list.next,
1102 struct smk_net4addr, list);
1103 if (new->smk_masks > m_next->smk_masks) {
1104 list_add_rcu(&new->list, &m->list);
1105 return;
1106 }
1107 }
1108}
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121static ssize_t smk_write_net4addr(struct file *file, const char __user *buf,
1122 size_t count, loff_t *ppos)
1123{
1124 struct smk_net4addr *snp;
1125 struct sockaddr_in newname;
1126 char *smack;
1127 struct smack_known *skp = NULL;
1128 char *data;
1129 char *host = (char *)&newname.sin_addr.s_addr;
1130 int rc;
1131 struct netlbl_audit audit_info;
1132 struct in_addr mask;
1133 unsigned int m;
1134 unsigned int masks;
1135 int found;
1136 u32 mask_bits = (1<<31);
1137 __be32 nsa;
1138 u32 temp_mask;
1139
1140
1141
1142
1143
1144
1145
1146
1147 if (!smack_privileged(CAP_MAC_ADMIN))
1148 return -EPERM;
1149 if (*ppos != 0)
1150 return -EINVAL;
1151 if (count < SMK_NETLBLADDRMIN)
1152 return -EINVAL;
1153
1154 data = memdup_user_nul(buf, count);
1155 if (IS_ERR(data))
1156 return PTR_ERR(data);
1157
1158 smack = kzalloc(count + 1, GFP_KERNEL);
1159 if (smack == NULL) {
1160 rc = -ENOMEM;
1161 goto free_data_out;
1162 }
1163
1164 rc = sscanf(data, "%hhd.%hhd.%hhd.%hhd/%u %s",
1165 &host[0], &host[1], &host[2], &host[3], &masks, smack);
1166 if (rc != 6) {
1167 rc = sscanf(data, "%hhd.%hhd.%hhd.%hhd %s",
1168 &host[0], &host[1], &host[2], &host[3], smack);
1169 if (rc != 5) {
1170 rc = -EINVAL;
1171 goto free_out;
1172 }
1173 m = BEBITS;
1174 masks = 32;
1175 }
1176 if (masks > BEBITS) {
1177 rc = -EINVAL;
1178 goto free_out;
1179 }
1180
1181
1182
1183
1184 if (smack[0] != '-') {
1185 skp = smk_import_entry(smack, 0);
1186 if (IS_ERR(skp)) {
1187 rc = PTR_ERR(skp);
1188 goto free_out;
1189 }
1190 } else {
1191
1192
1193
1194 if (strcmp(smack, SMACK_CIPSO_OPTION) != 0) {
1195 rc = -EINVAL;
1196 goto free_out;
1197 }
1198 }
1199
1200 for (m = masks, temp_mask = 0; m > 0; m--) {
1201 temp_mask |= mask_bits;
1202 mask_bits >>= 1;
1203 }
1204 mask.s_addr = cpu_to_be32(temp_mask);
1205
1206 newname.sin_addr.s_addr &= mask.s_addr;
1207
1208
1209
1210
1211 mutex_lock(&smk_net4addr_lock);
1212
1213 nsa = newname.sin_addr.s_addr;
1214
1215 found = 0;
1216 list_for_each_entry_rcu(snp, &smk_net4addr_list, list) {
1217 if (snp->smk_host.s_addr == nsa && snp->smk_masks == masks) {
1218 found = 1;
1219 break;
1220 }
1221 }
1222 smk_netlabel_audit_set(&audit_info);
1223
1224 if (found == 0) {
1225 snp = kzalloc(sizeof(*snp), GFP_KERNEL);
1226 if (snp == NULL)
1227 rc = -ENOMEM;
1228 else {
1229 rc = 0;
1230 snp->smk_host.s_addr = newname.sin_addr.s_addr;
1231 snp->smk_mask.s_addr = mask.s_addr;
1232 snp->smk_label = skp;
1233 snp->smk_masks = masks;
1234 smk_net4addr_insert(snp);
1235 }
1236 } else {
1237
1238
1239
1240
1241 if (snp->smk_label != NULL)
1242 rc = netlbl_cfg_unlbl_static_del(&init_net, NULL,
1243 &snp->smk_host, &snp->smk_mask,
1244 PF_INET, &audit_info);
1245 else
1246 rc = 0;
1247 snp->smk_label = skp;
1248 }
1249
1250
1251
1252
1253
1254
1255 if (rc == 0 && skp != NULL)
1256 rc = netlbl_cfg_unlbl_static_add(&init_net, NULL,
1257 &snp->smk_host, &snp->smk_mask, PF_INET,
1258 snp->smk_label->smk_secid, &audit_info);
1259
1260 if (rc == 0)
1261 rc = count;
1262
1263 mutex_unlock(&smk_net4addr_lock);
1264
1265free_out:
1266 kfree(smack);
1267free_data_out:
1268 kfree(data);
1269
1270 return rc;
1271}
1272
1273static const struct file_operations smk_net4addr_ops = {
1274 .open = smk_open_net4addr,
1275 .read = seq_read,
1276 .llseek = seq_lseek,
1277 .write = smk_write_net4addr,
1278 .release = seq_release,
1279};
1280
1281#if IS_ENABLED(CONFIG_IPV6)
1282
1283
1284
1285
1286static void *net6addr_seq_start(struct seq_file *s, loff_t *pos)
1287{
1288 return smk_seq_start(s, pos, &smk_net6addr_list);
1289}
1290
1291static void *net6addr_seq_next(struct seq_file *s, void *v, loff_t *pos)
1292{
1293 return smk_seq_next(s, v, pos, &smk_net6addr_list);
1294}
1295
1296
1297
1298
1299static int net6addr_seq_show(struct seq_file *s, void *v)
1300{
1301 struct list_head *list = v;
1302 struct smk_net6addr *skp =
1303 list_entry(list, struct smk_net6addr, list);
1304
1305 if (skp->smk_label != NULL)
1306 seq_printf(s, "%pI6/%d %s\n", &skp->smk_host, skp->smk_masks,
1307 skp->smk_label->smk_known);
1308
1309 return 0;
1310}
1311
1312static const struct seq_operations net6addr_seq_ops = {
1313 .start = net6addr_seq_start,
1314 .next = net6addr_seq_next,
1315 .show = net6addr_seq_show,
1316 .stop = smk_seq_stop,
1317};
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327static int smk_open_net6addr(struct inode *inode, struct file *file)
1328{
1329 return seq_open(file, &net6addr_seq_ops);
1330}
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341static void smk_net6addr_insert(struct smk_net6addr *new)
1342{
1343 struct smk_net6addr *m_next;
1344 struct smk_net6addr *m;
1345
1346 if (list_empty(&smk_net6addr_list)) {
1347 list_add_rcu(&new->list, &smk_net6addr_list);
1348 return;
1349 }
1350
1351 m = list_entry_rcu(smk_net6addr_list.next,
1352 struct smk_net6addr, list);
1353
1354 if (new->smk_masks > m->smk_masks) {
1355 list_add_rcu(&new->list, &smk_net6addr_list);
1356 return;
1357 }
1358
1359 list_for_each_entry_rcu(m, &smk_net6addr_list, list) {
1360 if (list_is_last(&m->list, &smk_net6addr_list)) {
1361 list_add_rcu(&new->list, &m->list);
1362 return;
1363 }
1364 m_next = list_entry_rcu(m->list.next,
1365 struct smk_net6addr, list);
1366 if (new->smk_masks > m_next->smk_masks) {
1367 list_add_rcu(&new->list, &m->list);
1368 return;
1369 }
1370 }
1371}
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384static ssize_t smk_write_net6addr(struct file *file, const char __user *buf,
1385 size_t count, loff_t *ppos)
1386{
1387 struct smk_net6addr *snp;
1388 struct in6_addr newname;
1389 struct in6_addr fullmask;
1390 struct smack_known *skp = NULL;
1391 char *smack;
1392 char *data;
1393 int rc = 0;
1394 int found = 0;
1395 int i;
1396 unsigned int scanned[8];
1397 unsigned int m;
1398 unsigned int mask = 128;
1399
1400
1401
1402
1403
1404
1405
1406
1407 if (!smack_privileged(CAP_MAC_ADMIN))
1408 return -EPERM;
1409 if (*ppos != 0)
1410 return -EINVAL;
1411 if (count < SMK_NETLBLADDRMIN)
1412 return -EINVAL;
1413
1414 data = memdup_user_nul(buf, count);
1415 if (IS_ERR(data))
1416 return PTR_ERR(data);
1417
1418 smack = kzalloc(count + 1, GFP_KERNEL);
1419 if (smack == NULL) {
1420 rc = -ENOMEM;
1421 goto free_data_out;
1422 }
1423
1424 i = sscanf(data, "%x:%x:%x:%x:%x:%x:%x:%x/%u %s",
1425 &scanned[0], &scanned[1], &scanned[2], &scanned[3],
1426 &scanned[4], &scanned[5], &scanned[6], &scanned[7],
1427 &mask, smack);
1428 if (i != 10) {
1429 i = sscanf(data, "%x:%x:%x:%x:%x:%x:%x:%x %s",
1430 &scanned[0], &scanned[1], &scanned[2],
1431 &scanned[3], &scanned[4], &scanned[5],
1432 &scanned[6], &scanned[7], smack);
1433 if (i != 9) {
1434 rc = -EINVAL;
1435 goto free_out;
1436 }
1437 }
1438 if (mask > 128) {
1439 rc = -EINVAL;
1440 goto free_out;
1441 }
1442 for (i = 0; i < 8; i++) {
1443 if (scanned[i] > 0xffff) {
1444 rc = -EINVAL;
1445 goto free_out;
1446 }
1447 newname.s6_addr16[i] = htons(scanned[i]);
1448 }
1449
1450
1451
1452
1453 if (smack[0] != '-') {
1454 skp = smk_import_entry(smack, 0);
1455 if (IS_ERR(skp)) {
1456 rc = PTR_ERR(skp);
1457 goto free_out;
1458 }
1459 } else {
1460
1461
1462
1463 if (strcmp(smack, SMACK_DELETE_OPTION) != 0) {
1464 rc = -EINVAL;
1465 goto free_out;
1466 }
1467 }
1468
1469 for (i = 0, m = mask; i < 8; i++) {
1470 if (m >= 16) {
1471 fullmask.s6_addr16[i] = 0xffff;
1472 m -= 16;
1473 } else if (m > 0) {
1474 fullmask.s6_addr16[i] = (1 << m) - 1;
1475 m = 0;
1476 } else
1477 fullmask.s6_addr16[i] = 0;
1478 newname.s6_addr16[i] &= fullmask.s6_addr16[i];
1479 }
1480
1481
1482
1483
1484
1485 mutex_lock(&smk_net6addr_lock);
1486
1487
1488
1489 list_for_each_entry_rcu(snp, &smk_net6addr_list, list) {
1490 if (mask != snp->smk_masks)
1491 continue;
1492 for (found = 1, i = 0; i < 8; i++) {
1493 if (newname.s6_addr16[i] !=
1494 snp->smk_host.s6_addr16[i]) {
1495 found = 0;
1496 break;
1497 }
1498 }
1499 if (found == 1)
1500 break;
1501 }
1502 if (found == 0) {
1503 snp = kzalloc(sizeof(*snp), GFP_KERNEL);
1504 if (snp == NULL)
1505 rc = -ENOMEM;
1506 else {
1507 snp->smk_host = newname;
1508 snp->smk_mask = fullmask;
1509 snp->smk_masks = mask;
1510 snp->smk_label = skp;
1511 smk_net6addr_insert(snp);
1512 }
1513 } else {
1514 snp->smk_label = skp;
1515 }
1516
1517 if (rc == 0)
1518 rc = count;
1519
1520 mutex_unlock(&smk_net6addr_lock);
1521
1522free_out:
1523 kfree(smack);
1524free_data_out:
1525 kfree(data);
1526
1527 return rc;
1528}
1529
1530static const struct file_operations smk_net6addr_ops = {
1531 .open = smk_open_net6addr,
1532 .read = seq_read,
1533 .llseek = seq_lseek,
1534 .write = smk_write_net6addr,
1535 .release = seq_release,
1536};
1537#endif
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548static ssize_t smk_read_doi(struct file *filp, char __user *buf,
1549 size_t count, loff_t *ppos)
1550{
1551 char temp[80];
1552 ssize_t rc;
1553
1554 if (*ppos != 0)
1555 return 0;
1556
1557 sprintf(temp, "%d", smk_cipso_doi_value);
1558 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
1559
1560 return rc;
1561}
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572static ssize_t smk_write_doi(struct file *file, const char __user *buf,
1573 size_t count, loff_t *ppos)
1574{
1575 char temp[80];
1576 int i;
1577
1578 if (!smack_privileged(CAP_MAC_ADMIN))
1579 return -EPERM;
1580
1581 if (count >= sizeof(temp) || count == 0)
1582 return -EINVAL;
1583
1584 if (copy_from_user(temp, buf, count) != 0)
1585 return -EFAULT;
1586
1587 temp[count] = '\0';
1588
1589 if (sscanf(temp, "%d", &i) != 1)
1590 return -EINVAL;
1591
1592 smk_cipso_doi_value = i;
1593
1594 smk_cipso_doi();
1595
1596 return count;
1597}
1598
1599static const struct file_operations smk_doi_ops = {
1600 .read = smk_read_doi,
1601 .write = smk_write_doi,
1602 .llseek = default_llseek,
1603};
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614static ssize_t smk_read_direct(struct file *filp, char __user *buf,
1615 size_t count, loff_t *ppos)
1616{
1617 char temp[80];
1618 ssize_t rc;
1619
1620 if (*ppos != 0)
1621 return 0;
1622
1623 sprintf(temp, "%d", smack_cipso_direct);
1624 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
1625
1626 return rc;
1627}
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638static ssize_t smk_write_direct(struct file *file, const char __user *buf,
1639 size_t count, loff_t *ppos)
1640{
1641 struct smack_known *skp;
1642 char temp[80];
1643 int i;
1644
1645 if (!smack_privileged(CAP_MAC_ADMIN))
1646 return -EPERM;
1647
1648 if (count >= sizeof(temp) || count == 0)
1649 return -EINVAL;
1650
1651 if (copy_from_user(temp, buf, count) != 0)
1652 return -EFAULT;
1653
1654 temp[count] = '\0';
1655
1656 if (sscanf(temp, "%d", &i) != 1)
1657 return -EINVAL;
1658
1659
1660
1661
1662
1663
1664 if (smack_cipso_direct != i) {
1665 mutex_lock(&smack_known_lock);
1666 list_for_each_entry_rcu(skp, &smack_known_list, list)
1667 if (skp->smk_netlabel.attr.mls.lvl ==
1668 smack_cipso_direct)
1669 skp->smk_netlabel.attr.mls.lvl = i;
1670 smack_cipso_direct = i;
1671 mutex_unlock(&smack_known_lock);
1672 }
1673
1674 return count;
1675}
1676
1677static const struct file_operations smk_direct_ops = {
1678 .read = smk_read_direct,
1679 .write = smk_write_direct,
1680 .llseek = default_llseek,
1681};
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692static ssize_t smk_read_mapped(struct file *filp, char __user *buf,
1693 size_t count, loff_t *ppos)
1694{
1695 char temp[80];
1696 ssize_t rc;
1697
1698 if (*ppos != 0)
1699 return 0;
1700
1701 sprintf(temp, "%d", smack_cipso_mapped);
1702 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
1703
1704 return rc;
1705}
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716static ssize_t smk_write_mapped(struct file *file, const char __user *buf,
1717 size_t count, loff_t *ppos)
1718{
1719 struct smack_known *skp;
1720 char temp[80];
1721 int i;
1722
1723 if (!smack_privileged(CAP_MAC_ADMIN))
1724 return -EPERM;
1725
1726 if (count >= sizeof(temp) || count == 0)
1727 return -EINVAL;
1728
1729 if (copy_from_user(temp, buf, count) != 0)
1730 return -EFAULT;
1731
1732 temp[count] = '\0';
1733
1734 if (sscanf(temp, "%d", &i) != 1)
1735 return -EINVAL;
1736
1737
1738
1739
1740
1741
1742 if (smack_cipso_mapped != i) {
1743 mutex_lock(&smack_known_lock);
1744 list_for_each_entry_rcu(skp, &smack_known_list, list)
1745 if (skp->smk_netlabel.attr.mls.lvl ==
1746 smack_cipso_mapped)
1747 skp->smk_netlabel.attr.mls.lvl = i;
1748 smack_cipso_mapped = i;
1749 mutex_unlock(&smack_known_lock);
1750 }
1751
1752 return count;
1753}
1754
1755static const struct file_operations smk_mapped_ops = {
1756 .read = smk_read_mapped,
1757 .write = smk_write_mapped,
1758 .llseek = default_llseek,
1759};
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770static ssize_t smk_read_ambient(struct file *filp, char __user *buf,
1771 size_t cn, loff_t *ppos)
1772{
1773 ssize_t rc;
1774 int asize;
1775
1776 if (*ppos != 0)
1777 return 0;
1778
1779
1780
1781
1782 mutex_lock(&smack_ambient_lock);
1783
1784 asize = strlen(smack_net_ambient->smk_known) + 1;
1785
1786 if (cn >= asize)
1787 rc = simple_read_from_buffer(buf, cn, ppos,
1788 smack_net_ambient->smk_known,
1789 asize);
1790 else
1791 rc = -EINVAL;
1792
1793 mutex_unlock(&smack_ambient_lock);
1794
1795 return rc;
1796}
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807static ssize_t smk_write_ambient(struct file *file, const char __user *buf,
1808 size_t count, loff_t *ppos)
1809{
1810 struct smack_known *skp;
1811 char *oldambient;
1812 char *data;
1813 int rc = count;
1814
1815 if (!smack_privileged(CAP_MAC_ADMIN))
1816 return -EPERM;
1817
1818 data = memdup_user_nul(buf, count);
1819 if (IS_ERR(data))
1820 return PTR_ERR(data);
1821
1822 skp = smk_import_entry(data, count);
1823 if (IS_ERR(skp)) {
1824 rc = PTR_ERR(skp);
1825 goto out;
1826 }
1827
1828 mutex_lock(&smack_ambient_lock);
1829
1830 oldambient = smack_net_ambient->smk_known;
1831 smack_net_ambient = skp;
1832 smk_unlbl_ambient(oldambient);
1833
1834 mutex_unlock(&smack_ambient_lock);
1835
1836out:
1837 kfree(data);
1838 return rc;
1839}
1840
1841static const struct file_operations smk_ambient_ops = {
1842 .read = smk_read_ambient,
1843 .write = smk_write_ambient,
1844 .llseek = default_llseek,
1845};
1846
1847
1848
1849
1850static void *onlycap_seq_start(struct seq_file *s, loff_t *pos)
1851{
1852 return smk_seq_start(s, pos, &smack_onlycap_list);
1853}
1854
1855static void *onlycap_seq_next(struct seq_file *s, void *v, loff_t *pos)
1856{
1857 return smk_seq_next(s, v, pos, &smack_onlycap_list);
1858}
1859
1860static int onlycap_seq_show(struct seq_file *s, void *v)
1861{
1862 struct list_head *list = v;
1863 struct smack_known_list_elem *sklep =
1864 list_entry_rcu(list, struct smack_known_list_elem, list);
1865
1866 seq_puts(s, sklep->smk_label->smk_known);
1867 seq_putc(s, ' ');
1868
1869 return 0;
1870}
1871
1872static const struct seq_operations onlycap_seq_ops = {
1873 .start = onlycap_seq_start,
1874 .next = onlycap_seq_next,
1875 .show = onlycap_seq_show,
1876 .stop = smk_seq_stop,
1877};
1878
1879static int smk_open_onlycap(struct inode *inode, struct file *file)
1880{
1881 return seq_open(file, &onlycap_seq_ops);
1882}
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893static void smk_list_swap_rcu(struct list_head *public,
1894 struct list_head *private)
1895{
1896 struct list_head *first, *last;
1897
1898 if (list_empty(public)) {
1899 list_splice_init_rcu(private, public, synchronize_rcu);
1900 } else {
1901
1902 first = public->next;
1903 last = public->prev;
1904
1905
1906 private->prev->next = public;
1907 private->next->prev = public;
1908 rcu_assign_pointer(public->next, private->next);
1909 public->prev = private->prev;
1910
1911 synchronize_rcu();
1912
1913
1914
1915 private->next = first;
1916 private->prev = last;
1917 first->prev = private;
1918 last->next = private;
1919 }
1920}
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930static int smk_parse_label_list(char *data, struct list_head *list)
1931{
1932 char *tok;
1933 struct smack_known *skp;
1934 struct smack_known_list_elem *sklep;
1935
1936 while ((tok = strsep(&data, " ")) != NULL) {
1937 if (!*tok)
1938 continue;
1939
1940 skp = smk_import_entry(tok, 0);
1941 if (IS_ERR(skp))
1942 return PTR_ERR(skp);
1943
1944 sklep = kzalloc(sizeof(*sklep), GFP_KERNEL);
1945 if (sklep == NULL)
1946 return -ENOMEM;
1947
1948 sklep->smk_label = skp;
1949 list_add(&sklep->list, list);
1950 }
1951
1952 return 0;
1953}
1954
1955
1956
1957
1958
1959void smk_destroy_label_list(struct list_head *list)
1960{
1961 struct smack_known_list_elem *sklep;
1962 struct smack_known_list_elem *sklep2;
1963
1964 list_for_each_entry_safe(sklep, sklep2, list, list)
1965 kfree(sklep);
1966
1967 INIT_LIST_HEAD(list);
1968}
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979static ssize_t smk_write_onlycap(struct file *file, const char __user *buf,
1980 size_t count, loff_t *ppos)
1981{
1982 char *data;
1983 LIST_HEAD(list_tmp);
1984 int rc;
1985
1986 if (!smack_privileged(CAP_MAC_ADMIN))
1987 return -EPERM;
1988
1989 data = memdup_user_nul(buf, count);
1990 if (IS_ERR(data))
1991 return PTR_ERR(data);
1992
1993 rc = smk_parse_label_list(data, &list_tmp);
1994 kfree(data);
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006 if (!rc || (rc == -EINVAL && list_empty(&list_tmp))) {
2007 mutex_lock(&smack_onlycap_lock);
2008 smk_list_swap_rcu(&smack_onlycap_list, &list_tmp);
2009 mutex_unlock(&smack_onlycap_lock);
2010 rc = count;
2011 }
2012
2013 smk_destroy_label_list(&list_tmp);
2014
2015 return rc;
2016}
2017
2018static const struct file_operations smk_onlycap_ops = {
2019 .open = smk_open_onlycap,
2020 .read = seq_read,
2021 .write = smk_write_onlycap,
2022 .llseek = seq_lseek,
2023 .release = seq_release,
2024};
2025
2026#ifdef CONFIG_SECURITY_SMACK_BRINGUP
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036static ssize_t smk_read_unconfined(struct file *filp, char __user *buf,
2037 size_t cn, loff_t *ppos)
2038{
2039 char *smack = "";
2040 ssize_t rc = -EINVAL;
2041 int asize;
2042
2043 if (*ppos != 0)
2044 return 0;
2045
2046 if (smack_unconfined != NULL)
2047 smack = smack_unconfined->smk_known;
2048
2049 asize = strlen(smack) + 1;
2050
2051 if (cn >= asize)
2052 rc = simple_read_from_buffer(buf, cn, ppos, smack, asize);
2053
2054 return rc;
2055}
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066static ssize_t smk_write_unconfined(struct file *file, const char __user *buf,
2067 size_t count, loff_t *ppos)
2068{
2069 char *data;
2070 struct smack_known *skp;
2071 int rc = count;
2072
2073 if (!smack_privileged(CAP_MAC_ADMIN))
2074 return -EPERM;
2075
2076 data = memdup_user_nul(buf, count);
2077 if (IS_ERR(data))
2078 return PTR_ERR(data);
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089 skp = smk_import_entry(data, count);
2090 if (PTR_ERR(skp) == -EINVAL)
2091 skp = NULL;
2092 else if (IS_ERR(skp)) {
2093 rc = PTR_ERR(skp);
2094 goto freeout;
2095 }
2096
2097 smack_unconfined = skp;
2098
2099freeout:
2100 kfree(data);
2101 return rc;
2102}
2103
2104static const struct file_operations smk_unconfined_ops = {
2105 .read = smk_read_unconfined,
2106 .write = smk_write_unconfined,
2107 .llseek = default_llseek,
2108};
2109#endif
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120static ssize_t smk_read_logging(struct file *filp, char __user *buf,
2121 size_t count, loff_t *ppos)
2122{
2123 char temp[32];
2124 ssize_t rc;
2125
2126 if (*ppos != 0)
2127 return 0;
2128
2129 sprintf(temp, "%d\n", log_policy);
2130 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
2131 return rc;
2132}
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143static ssize_t smk_write_logging(struct file *file, const char __user *buf,
2144 size_t count, loff_t *ppos)
2145{
2146 char temp[32];
2147 int i;
2148
2149 if (!smack_privileged(CAP_MAC_ADMIN))
2150 return -EPERM;
2151
2152 if (count >= sizeof(temp) || count == 0)
2153 return -EINVAL;
2154
2155 if (copy_from_user(temp, buf, count) != 0)
2156 return -EFAULT;
2157
2158 temp[count] = '\0';
2159
2160 if (sscanf(temp, "%d", &i) != 1)
2161 return -EINVAL;
2162 if (i < 0 || i > 3)
2163 return -EINVAL;
2164 log_policy = i;
2165 return count;
2166}
2167
2168
2169
2170static const struct file_operations smk_logging_ops = {
2171 .read = smk_read_logging,
2172 .write = smk_write_logging,
2173 .llseek = default_llseek,
2174};
2175
2176
2177
2178
2179
2180static void *load_self_seq_start(struct seq_file *s, loff_t *pos)
2181{
2182 struct task_smack *tsp = smack_cred(current_cred());
2183
2184 return smk_seq_start(s, pos, &tsp->smk_rules);
2185}
2186
2187static void *load_self_seq_next(struct seq_file *s, void *v, loff_t *pos)
2188{
2189 struct task_smack *tsp = smack_cred(current_cred());
2190
2191 return smk_seq_next(s, v, pos, &tsp->smk_rules);
2192}
2193
2194static int load_self_seq_show(struct seq_file *s, void *v)
2195{
2196 struct list_head *list = v;
2197 struct smack_rule *srp =
2198 list_entry_rcu(list, struct smack_rule, list);
2199
2200 smk_rule_show(s, srp, SMK_LABELLEN);
2201
2202 return 0;
2203}
2204
2205static const struct seq_operations load_self_seq_ops = {
2206 .start = load_self_seq_start,
2207 .next = load_self_seq_next,
2208 .show = load_self_seq_show,
2209 .stop = smk_seq_stop,
2210};
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220static int smk_open_load_self(struct inode *inode, struct file *file)
2221{
2222 return seq_open(file, &load_self_seq_ops);
2223}
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233static ssize_t smk_write_load_self(struct file *file, const char __user *buf,
2234 size_t count, loff_t *ppos)
2235{
2236 struct task_smack *tsp = smack_cred(current_cred());
2237
2238 return smk_write_rules_list(file, buf, count, ppos, &tsp->smk_rules,
2239 &tsp->smk_rules_lock, SMK_FIXED24_FMT);
2240}
2241
2242static const struct file_operations smk_load_self_ops = {
2243 .open = smk_open_load_self,
2244 .read = seq_read,
2245 .llseek = seq_lseek,
2246 .write = smk_write_load_self,
2247 .release = seq_release,
2248};
2249
2250
2251
2252
2253
2254
2255
2256
2257static ssize_t smk_user_access(struct file *file, const char __user *buf,
2258 size_t count, loff_t *ppos, int format)
2259{
2260 struct smack_parsed_rule rule;
2261 char *data;
2262 int res;
2263
2264 data = simple_transaction_get(file, buf, count);
2265 if (IS_ERR(data))
2266 return PTR_ERR(data);
2267
2268 if (format == SMK_FIXED24_FMT) {
2269 if (count < SMK_LOADLEN)
2270 return -EINVAL;
2271 res = smk_parse_rule(data, &rule, 0);
2272 } else {
2273
2274
2275
2276 res = smk_parse_long_rule(data, &rule, 0, 3);
2277 }
2278
2279 if (res >= 0)
2280 res = smk_access(rule.smk_subject, rule.smk_object,
2281 rule.smk_access1, NULL);
2282 else if (res != -ENOENT)
2283 return res;
2284
2285
2286
2287
2288 data[0] = res >= 0 ? '1' : '0';
2289 data[1] = '\0';
2290
2291 simple_transaction_set(file, 2);
2292
2293 if (format == SMK_FIXED24_FMT)
2294 return SMK_LOADLEN;
2295 return count;
2296}
2297
2298
2299
2300
2301
2302
2303
2304
2305static ssize_t smk_write_access(struct file *file, const char __user *buf,
2306 size_t count, loff_t *ppos)
2307{
2308 return smk_user_access(file, buf, count, ppos, SMK_FIXED24_FMT);
2309}
2310
2311static const struct file_operations smk_access_ops = {
2312 .write = smk_write_access,
2313 .read = simple_transaction_read,
2314 .release = simple_transaction_release,
2315 .llseek = generic_file_llseek,
2316};
2317
2318
2319
2320
2321
2322
2323static int load2_seq_show(struct seq_file *s, void *v)
2324{
2325 struct list_head *list = v;
2326 struct smack_rule *srp;
2327 struct smack_known *skp =
2328 list_entry_rcu(list, struct smack_known, list);
2329
2330 list_for_each_entry_rcu(srp, &skp->smk_rules, list)
2331 smk_rule_show(s, srp, SMK_LONGLABEL);
2332
2333 return 0;
2334}
2335
2336static const struct seq_operations load2_seq_ops = {
2337 .start = load2_seq_start,
2338 .next = load2_seq_next,
2339 .show = load2_seq_show,
2340 .stop = smk_seq_stop,
2341};
2342
2343
2344
2345
2346
2347
2348
2349
2350static int smk_open_load2(struct inode *inode, struct file *file)
2351{
2352 return seq_open(file, &load2_seq_ops);
2353}
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363static ssize_t smk_write_load2(struct file *file, const char __user *buf,
2364 size_t count, loff_t *ppos)
2365{
2366
2367
2368
2369 if (!smack_privileged(CAP_MAC_ADMIN))
2370 return -EPERM;
2371
2372 return smk_write_rules_list(file, buf, count, ppos, NULL, NULL,
2373 SMK_LONG_FMT);
2374}
2375
2376static const struct file_operations smk_load2_ops = {
2377 .open = smk_open_load2,
2378 .read = seq_read,
2379 .llseek = seq_lseek,
2380 .write = smk_write_load2,
2381 .release = seq_release,
2382};
2383
2384
2385
2386
2387
2388static void *load_self2_seq_start(struct seq_file *s, loff_t *pos)
2389{
2390 struct task_smack *tsp = smack_cred(current_cred());
2391
2392 return smk_seq_start(s, pos, &tsp->smk_rules);
2393}
2394
2395static void *load_self2_seq_next(struct seq_file *s, void *v, loff_t *pos)
2396{
2397 struct task_smack *tsp = smack_cred(current_cred());
2398
2399 return smk_seq_next(s, v, pos, &tsp->smk_rules);
2400}
2401
2402static int load_self2_seq_show(struct seq_file *s, void *v)
2403{
2404 struct list_head *list = v;
2405 struct smack_rule *srp =
2406 list_entry_rcu(list, struct smack_rule, list);
2407
2408 smk_rule_show(s, srp, SMK_LONGLABEL);
2409
2410 return 0;
2411}
2412
2413static const struct seq_operations load_self2_seq_ops = {
2414 .start = load_self2_seq_start,
2415 .next = load_self2_seq_next,
2416 .show = load_self2_seq_show,
2417 .stop = smk_seq_stop,
2418};
2419
2420
2421
2422
2423
2424
2425
2426
2427static int smk_open_load_self2(struct inode *inode, struct file *file)
2428{
2429 return seq_open(file, &load_self2_seq_ops);
2430}
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440static ssize_t smk_write_load_self2(struct file *file, const char __user *buf,
2441 size_t count, loff_t *ppos)
2442{
2443 struct task_smack *tsp = smack_cred(current_cred());
2444
2445 return smk_write_rules_list(file, buf, count, ppos, &tsp->smk_rules,
2446 &tsp->smk_rules_lock, SMK_LONG_FMT);
2447}
2448
2449static const struct file_operations smk_load_self2_ops = {
2450 .open = smk_open_load_self2,
2451 .read = seq_read,
2452 .llseek = seq_lseek,
2453 .write = smk_write_load_self2,
2454 .release = seq_release,
2455};
2456
2457
2458
2459
2460
2461
2462
2463
2464static ssize_t smk_write_access2(struct file *file, const char __user *buf,
2465 size_t count, loff_t *ppos)
2466{
2467 return smk_user_access(file, buf, count, ppos, SMK_LONG_FMT);
2468}
2469
2470static const struct file_operations smk_access2_ops = {
2471 .write = smk_write_access2,
2472 .read = simple_transaction_read,
2473 .release = simple_transaction_release,
2474 .llseek = generic_file_llseek,
2475};
2476
2477
2478
2479
2480
2481
2482
2483
2484static ssize_t smk_write_revoke_subj(struct file *file, const char __user *buf,
2485 size_t count, loff_t *ppos)
2486{
2487 char *data;
2488 const char *cp;
2489 struct smack_known *skp;
2490 struct smack_rule *sp;
2491 struct list_head *rule_list;
2492 struct mutex *rule_lock;
2493 int rc = count;
2494
2495 if (*ppos != 0)
2496 return -EINVAL;
2497
2498 if (!smack_privileged(CAP_MAC_ADMIN))
2499 return -EPERM;
2500
2501 if (count == 0 || count > SMK_LONGLABEL)
2502 return -EINVAL;
2503
2504 data = memdup_user(buf, count);
2505 if (IS_ERR(data))
2506 return PTR_ERR(data);
2507
2508 cp = smk_parse_smack(data, count);
2509 if (IS_ERR(cp)) {
2510 rc = PTR_ERR(cp);
2511 goto out_data;
2512 }
2513
2514 skp = smk_find_entry(cp);
2515 if (skp == NULL)
2516 goto out_cp;
2517
2518 rule_list = &skp->smk_rules;
2519 rule_lock = &skp->smk_rules_lock;
2520
2521 mutex_lock(rule_lock);
2522
2523 list_for_each_entry_rcu(sp, rule_list, list)
2524 sp->smk_access = 0;
2525
2526 mutex_unlock(rule_lock);
2527
2528out_cp:
2529 kfree(cp);
2530out_data:
2531 kfree(data);
2532
2533 return rc;
2534}
2535
2536static const struct file_operations smk_revoke_subj_ops = {
2537 .write = smk_write_revoke_subj,
2538 .read = simple_transaction_read,
2539 .release = simple_transaction_release,
2540 .llseek = generic_file_llseek,
2541};
2542
2543
2544
2545
2546
2547static int smk_init_sysfs(void)
2548{
2549 return sysfs_create_mount_point(fs_kobj, "smackfs");
2550}
2551
2552
2553
2554
2555
2556
2557
2558
2559static ssize_t smk_write_change_rule(struct file *file, const char __user *buf,
2560 size_t count, loff_t *ppos)
2561{
2562
2563
2564
2565 if (!smack_privileged(CAP_MAC_ADMIN))
2566 return -EPERM;
2567
2568 return smk_write_rules_list(file, buf, count, ppos, NULL, NULL,
2569 SMK_CHANGE_FMT);
2570}
2571
2572static const struct file_operations smk_change_rule_ops = {
2573 .write = smk_write_change_rule,
2574 .read = simple_transaction_read,
2575 .release = simple_transaction_release,
2576 .llseek = generic_file_llseek,
2577};
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588static ssize_t smk_read_syslog(struct file *filp, char __user *buf,
2589 size_t cn, loff_t *ppos)
2590{
2591 struct smack_known *skp;
2592 ssize_t rc = -EINVAL;
2593 int asize;
2594
2595 if (*ppos != 0)
2596 return 0;
2597
2598 if (smack_syslog_label == NULL)
2599 skp = &smack_known_star;
2600 else
2601 skp = smack_syslog_label;
2602
2603 asize = strlen(skp->smk_known) + 1;
2604
2605 if (cn >= asize)
2606 rc = simple_read_from_buffer(buf, cn, ppos, skp->smk_known,
2607 asize);
2608
2609 return rc;
2610}
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621static ssize_t smk_write_syslog(struct file *file, const char __user *buf,
2622 size_t count, loff_t *ppos)
2623{
2624 char *data;
2625 struct smack_known *skp;
2626 int rc = count;
2627
2628 if (!smack_privileged(CAP_MAC_ADMIN))
2629 return -EPERM;
2630
2631 data = memdup_user_nul(buf, count);
2632 if (IS_ERR(data))
2633 return PTR_ERR(data);
2634
2635 skp = smk_import_entry(data, count);
2636 if (IS_ERR(skp))
2637 rc = PTR_ERR(skp);
2638 else
2639 smack_syslog_label = skp;
2640
2641 kfree(data);
2642 return rc;
2643}
2644
2645static const struct file_operations smk_syslog_ops = {
2646 .read = smk_read_syslog,
2647 .write = smk_write_syslog,
2648 .llseek = default_llseek,
2649};
2650
2651
2652
2653
2654
2655static void *relabel_self_seq_start(struct seq_file *s, loff_t *pos)
2656{
2657 struct task_smack *tsp = smack_cred(current_cred());
2658
2659 return smk_seq_start(s, pos, &tsp->smk_relabel);
2660}
2661
2662static void *relabel_self_seq_next(struct seq_file *s, void *v, loff_t *pos)
2663{
2664 struct task_smack *tsp = smack_cred(current_cred());
2665
2666 return smk_seq_next(s, v, pos, &tsp->smk_relabel);
2667}
2668
2669static int relabel_self_seq_show(struct seq_file *s, void *v)
2670{
2671 struct list_head *list = v;
2672 struct smack_known_list_elem *sklep =
2673 list_entry(list, struct smack_known_list_elem, list);
2674
2675 seq_puts(s, sklep->smk_label->smk_known);
2676 seq_putc(s, ' ');
2677
2678 return 0;
2679}
2680
2681static const struct seq_operations relabel_self_seq_ops = {
2682 .start = relabel_self_seq_start,
2683 .next = relabel_self_seq_next,
2684 .show = relabel_self_seq_show,
2685 .stop = smk_seq_stop,
2686};
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696static int smk_open_relabel_self(struct inode *inode, struct file *file)
2697{
2698 return seq_open(file, &relabel_self_seq_ops);
2699}
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709static ssize_t smk_write_relabel_self(struct file *file, const char __user *buf,
2710 size_t count, loff_t *ppos)
2711{
2712 struct task_smack *tsp = smack_cred(current_cred());
2713 char *data;
2714 int rc;
2715 LIST_HEAD(list_tmp);
2716
2717
2718
2719
2720 if (!smack_privileged(CAP_MAC_ADMIN))
2721 return -EPERM;
2722
2723
2724
2725
2726 if (*ppos != 0)
2727 return -EINVAL;
2728
2729 data = memdup_user_nul(buf, count);
2730 if (IS_ERR(data))
2731 return PTR_ERR(data);
2732
2733 rc = smk_parse_label_list(data, &list_tmp);
2734 kfree(data);
2735
2736 if (!rc || (rc == -EINVAL && list_empty(&list_tmp))) {
2737 smk_destroy_label_list(&tsp->smk_relabel);
2738 list_splice(&list_tmp, &tsp->smk_relabel);
2739 return count;
2740 }
2741
2742 smk_destroy_label_list(&list_tmp);
2743 return rc;
2744}
2745
2746static const struct file_operations smk_relabel_self_ops = {
2747 .open = smk_open_relabel_self,
2748 .read = seq_read,
2749 .llseek = seq_lseek,
2750 .write = smk_write_relabel_self,
2751 .release = seq_release,
2752};
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763static ssize_t smk_read_ptrace(struct file *filp, char __user *buf,
2764 size_t count, loff_t *ppos)
2765{
2766 char temp[32];
2767 ssize_t rc;
2768
2769 if (*ppos != 0)
2770 return 0;
2771
2772 sprintf(temp, "%d\n", smack_ptrace_rule);
2773 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
2774 return rc;
2775}
2776
2777
2778
2779
2780
2781
2782
2783
2784static ssize_t smk_write_ptrace(struct file *file, const char __user *buf,
2785 size_t count, loff_t *ppos)
2786{
2787 char temp[32];
2788 int i;
2789
2790 if (!smack_privileged(CAP_MAC_ADMIN))
2791 return -EPERM;
2792
2793 if (*ppos != 0 || count >= sizeof(temp) || count == 0)
2794 return -EINVAL;
2795
2796 if (copy_from_user(temp, buf, count) != 0)
2797 return -EFAULT;
2798
2799 temp[count] = '\0';
2800
2801 if (sscanf(temp, "%d", &i) != 1)
2802 return -EINVAL;
2803 if (i < SMACK_PTRACE_DEFAULT || i > SMACK_PTRACE_MAX)
2804 return -EINVAL;
2805 smack_ptrace_rule = i;
2806
2807 return count;
2808}
2809
2810static const struct file_operations smk_ptrace_ops = {
2811 .write = smk_write_ptrace,
2812 .read = smk_read_ptrace,
2813 .llseek = default_llseek,
2814};
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826static int smk_fill_super(struct super_block *sb, void *data, int silent)
2827{
2828 int rc;
2829
2830 static const struct tree_descr smack_files[] = {
2831 [SMK_LOAD] = {
2832 "load", &smk_load_ops, S_IRUGO|S_IWUSR},
2833 [SMK_CIPSO] = {
2834 "cipso", &smk_cipso_ops, S_IRUGO|S_IWUSR},
2835 [SMK_DOI] = {
2836 "doi", &smk_doi_ops, S_IRUGO|S_IWUSR},
2837 [SMK_DIRECT] = {
2838 "direct", &smk_direct_ops, S_IRUGO|S_IWUSR},
2839 [SMK_AMBIENT] = {
2840 "ambient", &smk_ambient_ops, S_IRUGO|S_IWUSR},
2841 [SMK_NET4ADDR] = {
2842 "netlabel", &smk_net4addr_ops, S_IRUGO|S_IWUSR},
2843 [SMK_ONLYCAP] = {
2844 "onlycap", &smk_onlycap_ops, S_IRUGO|S_IWUSR},
2845 [SMK_LOGGING] = {
2846 "logging", &smk_logging_ops, S_IRUGO|S_IWUSR},
2847 [SMK_LOAD_SELF] = {
2848 "load-self", &smk_load_self_ops, S_IRUGO|S_IWUGO},
2849 [SMK_ACCESSES] = {
2850 "access", &smk_access_ops, S_IRUGO|S_IWUGO},
2851 [SMK_MAPPED] = {
2852 "mapped", &smk_mapped_ops, S_IRUGO|S_IWUSR},
2853 [SMK_LOAD2] = {
2854 "load2", &smk_load2_ops, S_IRUGO|S_IWUSR},
2855 [SMK_LOAD_SELF2] = {
2856 "load-self2", &smk_load_self2_ops, S_IRUGO|S_IWUGO},
2857 [SMK_ACCESS2] = {
2858 "access2", &smk_access2_ops, S_IRUGO|S_IWUGO},
2859 [SMK_CIPSO2] = {
2860 "cipso2", &smk_cipso2_ops, S_IRUGO|S_IWUSR},
2861 [SMK_REVOKE_SUBJ] = {
2862 "revoke-subject", &smk_revoke_subj_ops,
2863 S_IRUGO|S_IWUSR},
2864 [SMK_CHANGE_RULE] = {
2865 "change-rule", &smk_change_rule_ops, S_IRUGO|S_IWUSR},
2866 [SMK_SYSLOG] = {
2867 "syslog", &smk_syslog_ops, S_IRUGO|S_IWUSR},
2868 [SMK_PTRACE] = {
2869 "ptrace", &smk_ptrace_ops, S_IRUGO|S_IWUSR},
2870#ifdef CONFIG_SECURITY_SMACK_BRINGUP
2871 [SMK_UNCONFINED] = {
2872 "unconfined", &smk_unconfined_ops, S_IRUGO|S_IWUSR},
2873#endif
2874#if IS_ENABLED(CONFIG_IPV6)
2875 [SMK_NET6ADDR] = {
2876 "ipv6host", &smk_net6addr_ops, S_IRUGO|S_IWUSR},
2877#endif
2878 [SMK_RELABEL_SELF] = {
2879 "relabel-self", &smk_relabel_self_ops,
2880 S_IRUGO|S_IWUGO},
2881
2882 {""}
2883 };
2884
2885 rc = simple_fill_super(sb, SMACK_MAGIC, smack_files);
2886 if (rc != 0) {
2887 printk(KERN_ERR "%s failed %d while creating inodes\n",
2888 __func__, rc);
2889 return rc;
2890 }
2891
2892 return 0;
2893}
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906static struct dentry *smk_mount(struct file_system_type *fs_type,
2907 int flags, const char *dev_name, void *data)
2908{
2909 return mount_single(fs_type, flags, data, smk_fill_super);
2910}
2911
2912static struct file_system_type smk_fs_type = {
2913 .name = "smackfs",
2914 .mount = smk_mount,
2915 .kill_sb = kill_litter_super,
2916};
2917
2918static struct vfsmount *smackfs_mount;
2919
2920static int __init smk_preset_netlabel(struct smack_known *skp)
2921{
2922 skp->smk_netlabel.domain = skp->smk_known;
2923 skp->smk_netlabel.flags =
2924 NETLBL_SECATTR_DOMAIN | NETLBL_SECATTR_MLS_LVL;
2925 return smk_netlbl_mls(smack_cipso_direct, skp->smk_known,
2926 &skp->smk_netlabel, strlen(skp->smk_known));
2927}
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942static int __init init_smk_fs(void)
2943{
2944 int err;
2945 int rc;
2946
2947 if (smack_enabled == 0)
2948 return 0;
2949
2950 err = smk_init_sysfs();
2951 if (err)
2952 printk(KERN_ERR "smackfs: sysfs mountpoint problem.\n");
2953
2954 err = register_filesystem(&smk_fs_type);
2955 if (!err) {
2956 smackfs_mount = kern_mount(&smk_fs_type);
2957 if (IS_ERR(smackfs_mount)) {
2958 printk(KERN_ERR "smackfs: could not mount!\n");
2959 err = PTR_ERR(smackfs_mount);
2960 smackfs_mount = NULL;
2961 }
2962 }
2963
2964 smk_cipso_doi();
2965 smk_unlbl_ambient(NULL);
2966
2967 rc = smk_preset_netlabel(&smack_known_floor);
2968 if (err == 0 && rc < 0)
2969 err = rc;
2970 rc = smk_preset_netlabel(&smack_known_hat);
2971 if (err == 0 && rc < 0)
2972 err = rc;
2973 rc = smk_preset_netlabel(&smack_known_huh);
2974 if (err == 0 && rc < 0)
2975 err = rc;
2976 rc = smk_preset_netlabel(&smack_known_star);
2977 if (err == 0 && rc < 0)
2978 err = rc;
2979 rc = smk_preset_netlabel(&smack_known_web);
2980 if (err == 0 && rc < 0)
2981 err = rc;
2982
2983 return err;
2984}
2985
2986__initcall(init_smk_fs);
2987