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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 <linux/fs_context.h>
27#include "smack.h"
28
29#define BEBITS (sizeof(__be32) * 8)
30
31
32
33
34enum smk_inos {
35 SMK_ROOT_INO = 2,
36 SMK_LOAD = 3,
37 SMK_CIPSO = 4,
38 SMK_DOI = 5,
39 SMK_DIRECT = 6,
40 SMK_AMBIENT = 7,
41 SMK_NET4ADDR = 8,
42 SMK_ONLYCAP = 9,
43 SMK_LOGGING = 10,
44 SMK_LOAD_SELF = 11,
45 SMK_ACCESSES = 12,
46 SMK_MAPPED = 13,
47 SMK_LOAD2 = 14,
48 SMK_LOAD_SELF2 = 15,
49 SMK_ACCESS2 = 16,
50 SMK_CIPSO2 = 17,
51 SMK_REVOKE_SUBJ = 18,
52 SMK_CHANGE_RULE = 19,
53 SMK_SYSLOG = 20,
54 SMK_PTRACE = 21,
55#ifdef CONFIG_SECURITY_SMACK_BRINGUP
56 SMK_UNCONFINED = 22,
57#endif
58#if IS_ENABLED(CONFIG_IPV6)
59 SMK_NET6ADDR = 23,
60#endif
61 SMK_RELABEL_SELF = 24,
62};
63
64
65
66
67static DEFINE_MUTEX(smack_cipso_lock);
68static DEFINE_MUTEX(smack_ambient_lock);
69static DEFINE_MUTEX(smk_net4addr_lock);
70#if IS_ENABLED(CONFIG_IPV6)
71static DEFINE_MUTEX(smk_net6addr_lock);
72#endif
73
74
75
76
77
78
79struct smack_known *smack_net_ambient;
80
81
82
83
84
85
86int smack_cipso_direct = SMACK_CIPSO_DIRECT_DEFAULT;
87
88
89
90
91
92
93int smack_cipso_mapped = SMACK_CIPSO_MAPPED_DEFAULT;
94
95#ifdef CONFIG_SECURITY_SMACK_BRINGUP
96
97
98
99
100
101
102struct smack_known *smack_unconfined;
103#endif
104
105
106
107
108
109struct smack_known *smack_syslog_label;
110
111
112
113
114
115
116
117
118int smack_ptrace_rule = SMACK_PTRACE_DEFAULT;
119
120
121
122
123
124
125
126LIST_HEAD(smk_net4addr_list);
127#if IS_ENABLED(CONFIG_IPV6)
128LIST_HEAD(smk_net6addr_list);
129#endif
130
131
132
133
134struct smack_parsed_rule {
135 struct smack_known *smk_subject;
136 struct smack_known *smk_object;
137 int smk_access1;
138 int smk_access2;
139};
140
141static int smk_cipso_doi_value = SMACK_CIPSO_DOI_DEFAULT;
142
143
144
145
146
147
148
149#define SMK_DIGITLEN 4
150#define SMK_CIPSOMIN (SMK_LABELLEN + 2 * SMK_DIGITLEN)
151#define SMK_CIPSOMAX (SMK_CIPSOMIN + SMACK_CIPSO_MAXCATNUM * SMK_DIGITLEN)
152
153
154
155
156
157
158
159#define SMK_OACCESS "rwxa"
160#define SMK_ACCESS "rwxatl"
161#define SMK_OACCESSLEN (sizeof(SMK_OACCESS) - 1)
162#define SMK_ACCESSLEN (sizeof(SMK_ACCESS) - 1)
163#define SMK_OLOADLEN (SMK_LABELLEN + SMK_LABELLEN + SMK_OACCESSLEN)
164#define SMK_LOADLEN (SMK_LABELLEN + SMK_LABELLEN + SMK_ACCESSLEN)
165
166
167
168
169
170static inline void smack_catset_bit(unsigned int cat, char *catsetp)
171{
172 if (cat == 0 || cat > (SMK_CIPSOLEN * 8))
173 return;
174
175 catsetp[(cat - 1) / 8] |= 0x80 >> ((cat - 1) % 8);
176}
177
178
179
180
181
182static void smk_netlabel_audit_set(struct netlbl_audit *nap)
183{
184 struct smack_known *skp = smk_of_current();
185
186 nap->loginuid = audit_get_loginuid(current);
187 nap->sessionid = audit_get_sessionid(current);
188 nap->secid = skp->smk_secid;
189}
190
191
192
193
194
195#define SMK_NETLBLADDRMIN 9
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211static int smk_set_access(struct smack_parsed_rule *srp,
212 struct list_head *rule_list,
213 struct mutex *rule_lock)
214{
215 struct smack_rule *sp;
216 int found = 0;
217 int rc = 0;
218
219 mutex_lock(rule_lock);
220
221
222
223
224
225 list_for_each_entry_rcu(sp, rule_list, list) {
226 if (sp->smk_object == srp->smk_object &&
227 sp->smk_subject == srp->smk_subject) {
228 found = 1;
229 sp->smk_access |= srp->smk_access1;
230 sp->smk_access &= ~srp->smk_access2;
231 break;
232 }
233 }
234
235 if (found == 0) {
236 sp = kmem_cache_zalloc(smack_rule_cache, GFP_KERNEL);
237 if (sp == NULL) {
238 rc = -ENOMEM;
239 goto out;
240 }
241
242 sp->smk_subject = srp->smk_subject;
243 sp->smk_object = srp->smk_object;
244 sp->smk_access = srp->smk_access1 & ~srp->smk_access2;
245
246 list_add_rcu(&sp->list, rule_list);
247 }
248
249out:
250 mutex_unlock(rule_lock);
251 return rc;
252}
253
254
255
256
257
258
259
260static int smk_perm_from_str(const char *string)
261{
262 int perm = 0;
263 const char *cp;
264
265 for (cp = string; ; cp++)
266 switch (*cp) {
267 case '-':
268 break;
269 case 'r':
270 case 'R':
271 perm |= MAY_READ;
272 break;
273 case 'w':
274 case 'W':
275 perm |= MAY_WRITE;
276 break;
277 case 'x':
278 case 'X':
279 perm |= MAY_EXEC;
280 break;
281 case 'a':
282 case 'A':
283 perm |= MAY_APPEND;
284 break;
285 case 't':
286 case 'T':
287 perm |= MAY_TRANSMUTE;
288 break;
289 case 'l':
290 case 'L':
291 perm |= MAY_LOCK;
292 break;
293 case 'b':
294 case 'B':
295 perm |= MAY_BRINGUP;
296 break;
297 default:
298 return perm;
299 }
300}
301
302
303
304
305
306
307
308
309
310
311
312
313
314static int smk_fill_rule(const char *subject, const char *object,
315 const char *access1, const char *access2,
316 struct smack_parsed_rule *rule, int import,
317 int len)
318{
319 const char *cp;
320 struct smack_known *skp;
321
322 if (import) {
323 rule->smk_subject = smk_import_entry(subject, len);
324 if (IS_ERR(rule->smk_subject))
325 return PTR_ERR(rule->smk_subject);
326
327 rule->smk_object = smk_import_entry(object, len);
328 if (IS_ERR(rule->smk_object))
329 return PTR_ERR(rule->smk_object);
330 } else {
331 cp = smk_parse_smack(subject, len);
332 if (IS_ERR(cp))
333 return PTR_ERR(cp);
334 skp = smk_find_entry(cp);
335 kfree(cp);
336 if (skp == NULL)
337 return -ENOENT;
338 rule->smk_subject = skp;
339
340 cp = smk_parse_smack(object, len);
341 if (IS_ERR(cp))
342 return PTR_ERR(cp);
343 skp = smk_find_entry(cp);
344 kfree(cp);
345 if (skp == NULL)
346 return -ENOENT;
347 rule->smk_object = skp;
348 }
349
350 rule->smk_access1 = smk_perm_from_str(access1);
351 if (access2)
352 rule->smk_access2 = smk_perm_from_str(access2);
353 else
354 rule->smk_access2 = ~rule->smk_access1;
355
356 return 0;
357}
358
359
360
361
362
363
364
365
366
367static int smk_parse_rule(const char *data, struct smack_parsed_rule *rule,
368 int import)
369{
370 int rc;
371
372 rc = smk_fill_rule(data, data + SMK_LABELLEN,
373 data + SMK_LABELLEN + SMK_LABELLEN, NULL, rule,
374 import, SMK_LABELLEN);
375 return rc;
376}
377
378
379
380
381
382
383
384
385
386
387static ssize_t smk_parse_long_rule(char *data, struct smack_parsed_rule *rule,
388 int import, int tokens)
389{
390 ssize_t cnt = 0;
391 char *tok[4];
392 int rc;
393 int i;
394
395
396
397
398 for (i = 0; i < tokens; ++i) {
399 while (isspace(data[cnt]))
400 data[cnt++] = '\0';
401
402 if (data[cnt] == '\0')
403
404 return -EINVAL;
405
406 tok[i] = data + cnt;
407
408 while (data[cnt] && !isspace(data[cnt]))
409 ++cnt;
410 }
411 while (isspace(data[cnt]))
412 data[cnt++] = '\0';
413
414 while (i < 4)
415 tok[i++] = NULL;
416
417 rc = smk_fill_rule(tok[0], tok[1], tok[2], tok[3], rule, import, 0);
418 return rc == 0 ? cnt : rc;
419}
420
421#define SMK_FIXED24_FMT 0
422#define SMK_LONG_FMT 1
423#define SMK_CHANGE_FMT 2
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443static ssize_t smk_write_rules_list(struct file *file, const char __user *buf,
444 size_t count, loff_t *ppos,
445 struct list_head *rule_list,
446 struct mutex *rule_lock, int format)
447{
448 struct smack_parsed_rule rule;
449 char *data;
450 int rc;
451 int trunc = 0;
452 int tokens;
453 ssize_t cnt = 0;
454
455
456
457
458
459 if (*ppos != 0)
460 return -EINVAL;
461
462 if (format == SMK_FIXED24_FMT) {
463
464
465
466 if (count < SMK_OLOADLEN || count > SMK_LOADLEN)
467 return -EINVAL;
468 } else {
469 if (count >= PAGE_SIZE) {
470 count = PAGE_SIZE - 1;
471 trunc = 1;
472 }
473 }
474
475 data = memdup_user_nul(buf, count);
476 if (IS_ERR(data))
477 return PTR_ERR(data);
478
479
480
481
482
483 if (trunc) {
484 while (count > 0 && (data[count - 1] != '\n'))
485 --count;
486 if (count == 0) {
487 rc = -EINVAL;
488 goto out;
489 }
490 }
491
492 data[count] = '\0';
493 tokens = (format == SMK_CHANGE_FMT ? 4 : 3);
494 while (cnt < count) {
495 if (format == SMK_FIXED24_FMT) {
496 rc = smk_parse_rule(data, &rule, 1);
497 if (rc < 0)
498 goto out;
499 cnt = count;
500 } else {
501 rc = smk_parse_long_rule(data + cnt, &rule, 1, tokens);
502 if (rc < 0)
503 goto out;
504 if (rc == 0) {
505 rc = -EINVAL;
506 goto out;
507 }
508 cnt += rc;
509 }
510
511 if (rule_list == NULL)
512 rc = smk_set_access(&rule, &rule.smk_subject->smk_rules,
513 &rule.smk_subject->smk_rules_lock);
514 else
515 rc = smk_set_access(&rule, rule_list, rule_lock);
516
517 if (rc)
518 goto out;
519 }
520
521 rc = cnt;
522out:
523 kfree(data);
524 return rc;
525}
526
527
528
529
530
531static void *smk_seq_start(struct seq_file *s, loff_t *pos,
532 struct list_head *head)
533{
534 struct list_head *list;
535 int i = *pos;
536
537 rcu_read_lock();
538 for (list = rcu_dereference(list_next_rcu(head));
539 list != head;
540 list = rcu_dereference(list_next_rcu(list))) {
541 if (i-- == 0)
542 return list;
543 }
544
545 return NULL;
546}
547
548static void *smk_seq_next(struct seq_file *s, void *v, loff_t *pos,
549 struct list_head *head)
550{
551 struct list_head *list = v;
552
553 ++*pos;
554 list = rcu_dereference(list_next_rcu(list));
555
556 return (list == head) ? NULL : list;
557}
558
559static void smk_seq_stop(struct seq_file *s, void *v)
560{
561 rcu_read_unlock();
562}
563
564static void smk_rule_show(struct seq_file *s, struct smack_rule *srp, int max)
565{
566
567
568
569
570
571
572 if (strlen(srp->smk_subject->smk_known) >= max ||
573 strlen(srp->smk_object->smk_known) >= max)
574 return;
575
576 if (srp->smk_access == 0)
577 return;
578
579 seq_printf(s, "%s %s",
580 srp->smk_subject->smk_known,
581 srp->smk_object->smk_known);
582
583 seq_putc(s, ' ');
584
585 if (srp->smk_access & MAY_READ)
586 seq_putc(s, 'r');
587 if (srp->smk_access & MAY_WRITE)
588 seq_putc(s, 'w');
589 if (srp->smk_access & MAY_EXEC)
590 seq_putc(s, 'x');
591 if (srp->smk_access & MAY_APPEND)
592 seq_putc(s, 'a');
593 if (srp->smk_access & MAY_TRANSMUTE)
594 seq_putc(s, 't');
595 if (srp->smk_access & MAY_LOCK)
596 seq_putc(s, 'l');
597 if (srp->smk_access & MAY_BRINGUP)
598 seq_putc(s, 'b');
599
600 seq_putc(s, '\n');
601}
602
603
604
605
606
607static void *load2_seq_start(struct seq_file *s, loff_t *pos)
608{
609 return smk_seq_start(s, pos, &smack_known_list);
610}
611
612static void *load2_seq_next(struct seq_file *s, void *v, loff_t *pos)
613{
614 return smk_seq_next(s, v, pos, &smack_known_list);
615}
616
617static int load_seq_show(struct seq_file *s, void *v)
618{
619 struct list_head *list = v;
620 struct smack_rule *srp;
621 struct smack_known *skp =
622 list_entry_rcu(list, struct smack_known, list);
623
624 list_for_each_entry_rcu(srp, &skp->smk_rules, list)
625 smk_rule_show(s, srp, SMK_LABELLEN);
626
627 return 0;
628}
629
630static const struct seq_operations load_seq_ops = {
631 .start = load2_seq_start,
632 .next = load2_seq_next,
633 .show = load_seq_show,
634 .stop = smk_seq_stop,
635};
636
637
638
639
640
641
642
643
644static int smk_open_load(struct inode *inode, struct file *file)
645{
646 return seq_open(file, &load_seq_ops);
647}
648
649
650
651
652
653
654
655
656
657static ssize_t smk_write_load(struct file *file, const char __user *buf,
658 size_t count, loff_t *ppos)
659{
660
661
662
663
664
665 if (!smack_privileged(CAP_MAC_ADMIN))
666 return -EPERM;
667
668 return smk_write_rules_list(file, buf, count, ppos, NULL, NULL,
669 SMK_FIXED24_FMT);
670}
671
672static const struct file_operations smk_load_ops = {
673 .open = smk_open_load,
674 .read = seq_read,
675 .llseek = seq_lseek,
676 .write = smk_write_load,
677 .release = seq_release,
678};
679
680
681
682
683static void smk_cipso_doi(void)
684{
685 int rc;
686 struct cipso_v4_doi *doip;
687 struct netlbl_audit nai;
688
689 smk_netlabel_audit_set(&nai);
690
691 rc = netlbl_cfg_map_del(NULL, PF_INET, NULL, NULL, &nai);
692 if (rc != 0)
693 printk(KERN_WARNING "%s:%d remove rc = %d\n",
694 __func__, __LINE__, rc);
695
696 doip = kmalloc(sizeof(struct cipso_v4_doi), GFP_KERNEL);
697 if (doip == NULL)
698 panic("smack: Failed to initialize cipso DOI.\n");
699 doip->map.std = NULL;
700 doip->doi = smk_cipso_doi_value;
701 doip->type = CIPSO_V4_MAP_PASS;
702 doip->tags[0] = CIPSO_V4_TAG_RBITMAP;
703 for (rc = 1; rc < CIPSO_V4_TAG_MAXCNT; rc++)
704 doip->tags[rc] = CIPSO_V4_TAG_INVALID;
705
706 rc = netlbl_cfg_cipsov4_add(doip, &nai);
707 if (rc != 0) {
708 printk(KERN_WARNING "%s:%d cipso add rc = %d\n",
709 __func__, __LINE__, rc);
710 kfree(doip);
711 return;
712 }
713 rc = netlbl_cfg_cipsov4_map_add(doip->doi, NULL, NULL, NULL, &nai);
714 if (rc != 0) {
715 printk(KERN_WARNING "%s:%d map add rc = %d\n",
716 __func__, __LINE__, rc);
717 kfree(doip);
718 return;
719 }
720}
721
722
723
724
725
726static void smk_unlbl_ambient(char *oldambient)
727{
728 int rc;
729 struct netlbl_audit nai;
730
731 smk_netlabel_audit_set(&nai);
732
733 if (oldambient != NULL) {
734 rc = netlbl_cfg_map_del(oldambient, PF_INET, NULL, NULL, &nai);
735 if (rc != 0)
736 printk(KERN_WARNING "%s:%d remove rc = %d\n",
737 __func__, __LINE__, rc);
738 }
739 if (smack_net_ambient == NULL)
740 smack_net_ambient = &smack_known_floor;
741
742 rc = netlbl_cfg_unlbl_map_add(smack_net_ambient->smk_known, PF_INET,
743 NULL, NULL, &nai);
744 if (rc != 0)
745 printk(KERN_WARNING "%s:%d add rc = %d\n",
746 __func__, __LINE__, rc);
747}
748
749
750
751
752
753static void *cipso_seq_start(struct seq_file *s, loff_t *pos)
754{
755 return smk_seq_start(s, pos, &smack_known_list);
756}
757
758static void *cipso_seq_next(struct seq_file *s, void *v, loff_t *pos)
759{
760 return smk_seq_next(s, v, pos, &smack_known_list);
761}
762
763
764
765
766
767static int cipso_seq_show(struct seq_file *s, void *v)
768{
769 struct list_head *list = v;
770 struct smack_known *skp =
771 list_entry_rcu(list, struct smack_known, list);
772 struct netlbl_lsm_catmap *cmp = skp->smk_netlabel.attr.mls.cat;
773 char sep = '/';
774 int i;
775
776
777
778
779
780
781
782
783
784 if (strlen(skp->smk_known) >= SMK_LABELLEN)
785 return 0;
786
787 seq_printf(s, "%s %3d", skp->smk_known, skp->smk_netlabel.attr.mls.lvl);
788
789 for (i = netlbl_catmap_walk(cmp, 0); i >= 0;
790 i = netlbl_catmap_walk(cmp, i + 1)) {
791 seq_printf(s, "%c%d", sep, i);
792 sep = ',';
793 }
794
795 seq_putc(s, '\n');
796
797 return 0;
798}
799
800static const struct seq_operations cipso_seq_ops = {
801 .start = cipso_seq_start,
802 .next = cipso_seq_next,
803 .show = cipso_seq_show,
804 .stop = smk_seq_stop,
805};
806
807
808
809
810
811
812
813
814
815static int smk_open_cipso(struct inode *inode, struct file *file)
816{
817 return seq_open(file, &cipso_seq_ops);
818}
819
820
821
822
823
824
825
826
827
828
829
830
831static ssize_t smk_set_cipso(struct file *file, const char __user *buf,
832 size_t count, loff_t *ppos, int format)
833{
834 struct smack_known *skp;
835 struct netlbl_lsm_secattr ncats;
836 char mapcatset[SMK_CIPSOLEN];
837 int maplevel;
838 unsigned int cat;
839 int catlen;
840 ssize_t rc = -EINVAL;
841 char *data = NULL;
842 char *rule;
843 int ret;
844 int i;
845
846
847
848
849
850
851 if (!smack_privileged(CAP_MAC_ADMIN))
852 return -EPERM;
853 if (*ppos != 0)
854 return -EINVAL;
855 if (format == SMK_FIXED24_FMT &&
856 (count < SMK_CIPSOMIN || count > SMK_CIPSOMAX))
857 return -EINVAL;
858
859 data = memdup_user_nul(buf, count);
860 if (IS_ERR(data))
861 return PTR_ERR(data);
862
863 rule = data;
864
865
866
867
868 mutex_lock(&smack_cipso_lock);
869
870 skp = smk_import_entry(rule, 0);
871 if (IS_ERR(skp)) {
872 rc = PTR_ERR(skp);
873 goto out;
874 }
875
876 if (format == SMK_FIXED24_FMT)
877 rule += SMK_LABELLEN;
878 else
879 rule += strlen(skp->smk_known) + 1;
880
881 if (rule > data + count) {
882 rc = -EOVERFLOW;
883 goto out;
884 }
885
886 ret = sscanf(rule, "%d", &maplevel);
887 if (ret != 1 || maplevel < 0 || maplevel > SMACK_CIPSO_MAXLEVEL)
888 goto out;
889
890 rule += SMK_DIGITLEN;
891 if (rule > data + count) {
892 rc = -EOVERFLOW;
893 goto out;
894 }
895
896 ret = sscanf(rule, "%d", &catlen);
897 if (ret != 1 || catlen > SMACK_CIPSO_MAXCATNUM)
898 goto out;
899
900 if (format == SMK_FIXED24_FMT &&
901 count != (SMK_CIPSOMIN + catlen * SMK_DIGITLEN))
902 goto out;
903
904 memset(mapcatset, 0, sizeof(mapcatset));
905
906 for (i = 0; i < catlen; i++) {
907 rule += SMK_DIGITLEN;
908 if (rule > data + count) {
909 rc = -EOVERFLOW;
910 goto out;
911 }
912 ret = sscanf(rule, "%u", &cat);
913 if (ret != 1 || cat > SMACK_CIPSO_MAXCATNUM)
914 goto out;
915
916 smack_catset_bit(cat, mapcatset);
917 }
918
919 rc = smk_netlbl_mls(maplevel, mapcatset, &ncats, SMK_CIPSOLEN);
920 if (rc >= 0) {
921 netlbl_catmap_free(skp->smk_netlabel.attr.mls.cat);
922 skp->smk_netlabel.attr.mls.cat = ncats.attr.mls.cat;
923 skp->smk_netlabel.attr.mls.lvl = ncats.attr.mls.lvl;
924 rc = count;
925 }
926
927out:
928 mutex_unlock(&smack_cipso_lock);
929 kfree(data);
930 return rc;
931}
932
933
934
935
936
937
938
939
940
941
942
943static ssize_t smk_write_cipso(struct file *file, const char __user *buf,
944 size_t count, loff_t *ppos)
945{
946 return smk_set_cipso(file, buf, count, ppos, SMK_FIXED24_FMT);
947}
948
949static const struct file_operations smk_cipso_ops = {
950 .open = smk_open_cipso,
951 .read = seq_read,
952 .llseek = seq_lseek,
953 .write = smk_write_cipso,
954 .release = seq_release,
955};
956
957
958
959
960
961
962
963
964
965static int cipso2_seq_show(struct seq_file *s, void *v)
966{
967 struct list_head *list = v;
968 struct smack_known *skp =
969 list_entry_rcu(list, struct smack_known, list);
970 struct netlbl_lsm_catmap *cmp = skp->smk_netlabel.attr.mls.cat;
971 char sep = '/';
972 int i;
973
974 seq_printf(s, "%s %3d", skp->smk_known, skp->smk_netlabel.attr.mls.lvl);
975
976 for (i = netlbl_catmap_walk(cmp, 0); i >= 0;
977 i = netlbl_catmap_walk(cmp, i + 1)) {
978 seq_printf(s, "%c%d", sep, i);
979 sep = ',';
980 }
981
982 seq_putc(s, '\n');
983
984 return 0;
985}
986
987static const struct seq_operations cipso2_seq_ops = {
988 .start = cipso_seq_start,
989 .next = cipso_seq_next,
990 .show = cipso2_seq_show,
991 .stop = smk_seq_stop,
992};
993
994
995
996
997
998
999
1000
1001
1002static int smk_open_cipso2(struct inode *inode, struct file *file)
1003{
1004 return seq_open(file, &cipso2_seq_ops);
1005}
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017static ssize_t smk_write_cipso2(struct file *file, const char __user *buf,
1018 size_t count, loff_t *ppos)
1019{
1020 return smk_set_cipso(file, buf, count, ppos, SMK_LONG_FMT);
1021}
1022
1023static const struct file_operations smk_cipso2_ops = {
1024 .open = smk_open_cipso2,
1025 .read = seq_read,
1026 .llseek = seq_lseek,
1027 .write = smk_write_cipso2,
1028 .release = seq_release,
1029};
1030
1031
1032
1033
1034
1035static void *net4addr_seq_start(struct seq_file *s, loff_t *pos)
1036{
1037 return smk_seq_start(s, pos, &smk_net4addr_list);
1038}
1039
1040static void *net4addr_seq_next(struct seq_file *s, void *v, loff_t *pos)
1041{
1042 return smk_seq_next(s, v, pos, &smk_net4addr_list);
1043}
1044
1045
1046
1047
1048static int net4addr_seq_show(struct seq_file *s, void *v)
1049{
1050 struct list_head *list = v;
1051 struct smk_net4addr *skp =
1052 list_entry_rcu(list, struct smk_net4addr, list);
1053 char *kp = SMACK_CIPSO_OPTION;
1054
1055 if (skp->smk_label != NULL)
1056 kp = skp->smk_label->smk_known;
1057 seq_printf(s, "%pI4/%d %s\n", &skp->smk_host.s_addr,
1058 skp->smk_masks, kp);
1059
1060 return 0;
1061}
1062
1063static const struct seq_operations net4addr_seq_ops = {
1064 .start = net4addr_seq_start,
1065 .next = net4addr_seq_next,
1066 .show = net4addr_seq_show,
1067 .stop = smk_seq_stop,
1068};
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078static int smk_open_net4addr(struct inode *inode, struct file *file)
1079{
1080 return seq_open(file, &net4addr_seq_ops);
1081}
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092static void smk_net4addr_insert(struct smk_net4addr *new)
1093{
1094 struct smk_net4addr *m;
1095 struct smk_net4addr *m_next;
1096
1097 if (list_empty(&smk_net4addr_list)) {
1098 list_add_rcu(&new->list, &smk_net4addr_list);
1099 return;
1100 }
1101
1102 m = list_entry_rcu(smk_net4addr_list.next,
1103 struct smk_net4addr, list);
1104
1105
1106 if (new->smk_masks > m->smk_masks) {
1107 list_add_rcu(&new->list, &smk_net4addr_list);
1108 return;
1109 }
1110
1111 list_for_each_entry_rcu(m, &smk_net4addr_list, list) {
1112 if (list_is_last(&m->list, &smk_net4addr_list)) {
1113 list_add_rcu(&new->list, &m->list);
1114 return;
1115 }
1116 m_next = list_entry_rcu(m->list.next,
1117 struct smk_net4addr, list);
1118 if (new->smk_masks > m_next->smk_masks) {
1119 list_add_rcu(&new->list, &m->list);
1120 return;
1121 }
1122 }
1123}
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136static ssize_t smk_write_net4addr(struct file *file, const char __user *buf,
1137 size_t count, loff_t *ppos)
1138{
1139 struct smk_net4addr *snp;
1140 struct sockaddr_in newname;
1141 char *smack;
1142 struct smack_known *skp = NULL;
1143 char *data;
1144 char *host = (char *)&newname.sin_addr.s_addr;
1145 int rc;
1146 struct netlbl_audit audit_info;
1147 struct in_addr mask;
1148 unsigned int m;
1149 unsigned int masks;
1150 int found;
1151 u32 mask_bits = (1<<31);
1152 __be32 nsa;
1153 u32 temp_mask;
1154
1155
1156
1157
1158
1159
1160
1161
1162 if (!smack_privileged(CAP_MAC_ADMIN))
1163 return -EPERM;
1164 if (*ppos != 0)
1165 return -EINVAL;
1166 if (count < SMK_NETLBLADDRMIN)
1167 return -EINVAL;
1168
1169 data = memdup_user_nul(buf, count);
1170 if (IS_ERR(data))
1171 return PTR_ERR(data);
1172
1173 smack = kzalloc(count + 1, GFP_KERNEL);
1174 if (smack == NULL) {
1175 rc = -ENOMEM;
1176 goto free_data_out;
1177 }
1178
1179 rc = sscanf(data, "%hhd.%hhd.%hhd.%hhd/%u %s",
1180 &host[0], &host[1], &host[2], &host[3], &masks, smack);
1181 if (rc != 6) {
1182 rc = sscanf(data, "%hhd.%hhd.%hhd.%hhd %s",
1183 &host[0], &host[1], &host[2], &host[3], smack);
1184 if (rc != 5) {
1185 rc = -EINVAL;
1186 goto free_out;
1187 }
1188 m = BEBITS;
1189 masks = 32;
1190 }
1191 if (masks > BEBITS) {
1192 rc = -EINVAL;
1193 goto free_out;
1194 }
1195
1196
1197
1198
1199 if (smack[0] != '-') {
1200 skp = smk_import_entry(smack, 0);
1201 if (IS_ERR(skp)) {
1202 rc = PTR_ERR(skp);
1203 goto free_out;
1204 }
1205 } else {
1206
1207
1208
1209 if (strcmp(smack, SMACK_CIPSO_OPTION) != 0) {
1210 rc = -EINVAL;
1211 goto free_out;
1212 }
1213 }
1214
1215 for (m = masks, temp_mask = 0; m > 0; m--) {
1216 temp_mask |= mask_bits;
1217 mask_bits >>= 1;
1218 }
1219 mask.s_addr = cpu_to_be32(temp_mask);
1220
1221 newname.sin_addr.s_addr &= mask.s_addr;
1222
1223
1224
1225
1226 mutex_lock(&smk_net4addr_lock);
1227
1228 nsa = newname.sin_addr.s_addr;
1229
1230 found = 0;
1231 list_for_each_entry_rcu(snp, &smk_net4addr_list, list) {
1232 if (snp->smk_host.s_addr == nsa && snp->smk_masks == masks) {
1233 found = 1;
1234 break;
1235 }
1236 }
1237 smk_netlabel_audit_set(&audit_info);
1238
1239 if (found == 0) {
1240 snp = kzalloc(sizeof(*snp), GFP_KERNEL);
1241 if (snp == NULL)
1242 rc = -ENOMEM;
1243 else {
1244 rc = 0;
1245 snp->smk_host.s_addr = newname.sin_addr.s_addr;
1246 snp->smk_mask.s_addr = mask.s_addr;
1247 snp->smk_label = skp;
1248 snp->smk_masks = masks;
1249 smk_net4addr_insert(snp);
1250 }
1251 } else {
1252
1253
1254
1255
1256 if (snp->smk_label != NULL)
1257 rc = netlbl_cfg_unlbl_static_del(&init_net, NULL,
1258 &snp->smk_host, &snp->smk_mask,
1259 PF_INET, &audit_info);
1260 else
1261 rc = 0;
1262 snp->smk_label = skp;
1263 }
1264
1265
1266
1267
1268
1269
1270 if (rc == 0 && skp != NULL)
1271 rc = netlbl_cfg_unlbl_static_add(&init_net, NULL,
1272 &snp->smk_host, &snp->smk_mask, PF_INET,
1273 snp->smk_label->smk_secid, &audit_info);
1274
1275 if (rc == 0)
1276 rc = count;
1277
1278 mutex_unlock(&smk_net4addr_lock);
1279
1280free_out:
1281 kfree(smack);
1282free_data_out:
1283 kfree(data);
1284
1285 return rc;
1286}
1287
1288static const struct file_operations smk_net4addr_ops = {
1289 .open = smk_open_net4addr,
1290 .read = seq_read,
1291 .llseek = seq_lseek,
1292 .write = smk_write_net4addr,
1293 .release = seq_release,
1294};
1295
1296#if IS_ENABLED(CONFIG_IPV6)
1297
1298
1299
1300
1301static void *net6addr_seq_start(struct seq_file *s, loff_t *pos)
1302{
1303 return smk_seq_start(s, pos, &smk_net6addr_list);
1304}
1305
1306static void *net6addr_seq_next(struct seq_file *s, void *v, loff_t *pos)
1307{
1308 return smk_seq_next(s, v, pos, &smk_net6addr_list);
1309}
1310
1311
1312
1313
1314static int net6addr_seq_show(struct seq_file *s, void *v)
1315{
1316 struct list_head *list = v;
1317 struct smk_net6addr *skp =
1318 list_entry(list, struct smk_net6addr, list);
1319
1320 if (skp->smk_label != NULL)
1321 seq_printf(s, "%pI6/%d %s\n", &skp->smk_host, skp->smk_masks,
1322 skp->smk_label->smk_known);
1323
1324 return 0;
1325}
1326
1327static const struct seq_operations net6addr_seq_ops = {
1328 .start = net6addr_seq_start,
1329 .next = net6addr_seq_next,
1330 .show = net6addr_seq_show,
1331 .stop = smk_seq_stop,
1332};
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342static int smk_open_net6addr(struct inode *inode, struct file *file)
1343{
1344 return seq_open(file, &net6addr_seq_ops);
1345}
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356static void smk_net6addr_insert(struct smk_net6addr *new)
1357{
1358 struct smk_net6addr *m_next;
1359 struct smk_net6addr *m;
1360
1361 if (list_empty(&smk_net6addr_list)) {
1362 list_add_rcu(&new->list, &smk_net6addr_list);
1363 return;
1364 }
1365
1366 m = list_entry_rcu(smk_net6addr_list.next,
1367 struct smk_net6addr, list);
1368
1369 if (new->smk_masks > m->smk_masks) {
1370 list_add_rcu(&new->list, &smk_net6addr_list);
1371 return;
1372 }
1373
1374 list_for_each_entry_rcu(m, &smk_net6addr_list, list) {
1375 if (list_is_last(&m->list, &smk_net6addr_list)) {
1376 list_add_rcu(&new->list, &m->list);
1377 return;
1378 }
1379 m_next = list_entry_rcu(m->list.next,
1380 struct smk_net6addr, list);
1381 if (new->smk_masks > m_next->smk_masks) {
1382 list_add_rcu(&new->list, &m->list);
1383 return;
1384 }
1385 }
1386}
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399static ssize_t smk_write_net6addr(struct file *file, const char __user *buf,
1400 size_t count, loff_t *ppos)
1401{
1402 struct smk_net6addr *snp;
1403 struct in6_addr newname;
1404 struct in6_addr fullmask;
1405 struct smack_known *skp = NULL;
1406 char *smack;
1407 char *data;
1408 int rc = 0;
1409 int found = 0;
1410 int i;
1411 unsigned int scanned[8];
1412 unsigned int m;
1413 unsigned int mask = 128;
1414
1415
1416
1417
1418
1419
1420
1421
1422 if (!smack_privileged(CAP_MAC_ADMIN))
1423 return -EPERM;
1424 if (*ppos != 0)
1425 return -EINVAL;
1426 if (count < SMK_NETLBLADDRMIN)
1427 return -EINVAL;
1428
1429 data = memdup_user_nul(buf, count);
1430 if (IS_ERR(data))
1431 return PTR_ERR(data);
1432
1433 smack = kzalloc(count + 1, GFP_KERNEL);
1434 if (smack == NULL) {
1435 rc = -ENOMEM;
1436 goto free_data_out;
1437 }
1438
1439 i = sscanf(data, "%x:%x:%x:%x:%x:%x:%x:%x/%u %s",
1440 &scanned[0], &scanned[1], &scanned[2], &scanned[3],
1441 &scanned[4], &scanned[5], &scanned[6], &scanned[7],
1442 &mask, smack);
1443 if (i != 10) {
1444 i = sscanf(data, "%x:%x:%x:%x:%x:%x:%x:%x %s",
1445 &scanned[0], &scanned[1], &scanned[2],
1446 &scanned[3], &scanned[4], &scanned[5],
1447 &scanned[6], &scanned[7], smack);
1448 if (i != 9) {
1449 rc = -EINVAL;
1450 goto free_out;
1451 }
1452 }
1453 if (mask > 128) {
1454 rc = -EINVAL;
1455 goto free_out;
1456 }
1457 for (i = 0; i < 8; i++) {
1458 if (scanned[i] > 0xffff) {
1459 rc = -EINVAL;
1460 goto free_out;
1461 }
1462 newname.s6_addr16[i] = htons(scanned[i]);
1463 }
1464
1465
1466
1467
1468 if (smack[0] != '-') {
1469 skp = smk_import_entry(smack, 0);
1470 if (IS_ERR(skp)) {
1471 rc = PTR_ERR(skp);
1472 goto free_out;
1473 }
1474 } else {
1475
1476
1477
1478 if (strcmp(smack, SMACK_DELETE_OPTION) != 0) {
1479 rc = -EINVAL;
1480 goto free_out;
1481 }
1482 }
1483
1484 for (i = 0, m = mask; i < 8; i++) {
1485 if (m >= 16) {
1486 fullmask.s6_addr16[i] = 0xffff;
1487 m -= 16;
1488 } else if (m > 0) {
1489 fullmask.s6_addr16[i] = (1 << m) - 1;
1490 m = 0;
1491 } else
1492 fullmask.s6_addr16[i] = 0;
1493 newname.s6_addr16[i] &= fullmask.s6_addr16[i];
1494 }
1495
1496
1497
1498
1499
1500 mutex_lock(&smk_net6addr_lock);
1501
1502
1503
1504 list_for_each_entry_rcu(snp, &smk_net6addr_list, list) {
1505 if (mask != snp->smk_masks)
1506 continue;
1507 for (found = 1, i = 0; i < 8; i++) {
1508 if (newname.s6_addr16[i] !=
1509 snp->smk_host.s6_addr16[i]) {
1510 found = 0;
1511 break;
1512 }
1513 }
1514 if (found == 1)
1515 break;
1516 }
1517 if (found == 0) {
1518 snp = kzalloc(sizeof(*snp), GFP_KERNEL);
1519 if (snp == NULL)
1520 rc = -ENOMEM;
1521 else {
1522 snp->smk_host = newname;
1523 snp->smk_mask = fullmask;
1524 snp->smk_masks = mask;
1525 snp->smk_label = skp;
1526 smk_net6addr_insert(snp);
1527 }
1528 } else {
1529 snp->smk_label = skp;
1530 }
1531
1532 if (rc == 0)
1533 rc = count;
1534
1535 mutex_unlock(&smk_net6addr_lock);
1536
1537free_out:
1538 kfree(smack);
1539free_data_out:
1540 kfree(data);
1541
1542 return rc;
1543}
1544
1545static const struct file_operations smk_net6addr_ops = {
1546 .open = smk_open_net6addr,
1547 .read = seq_read,
1548 .llseek = seq_lseek,
1549 .write = smk_write_net6addr,
1550 .release = seq_release,
1551};
1552#endif
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563static ssize_t smk_read_doi(struct file *filp, char __user *buf,
1564 size_t count, loff_t *ppos)
1565{
1566 char temp[80];
1567 ssize_t rc;
1568
1569 if (*ppos != 0)
1570 return 0;
1571
1572 sprintf(temp, "%d", smk_cipso_doi_value);
1573 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
1574
1575 return rc;
1576}
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587static ssize_t smk_write_doi(struct file *file, const char __user *buf,
1588 size_t count, loff_t *ppos)
1589{
1590 char temp[80];
1591 int i;
1592
1593 if (!smack_privileged(CAP_MAC_ADMIN))
1594 return -EPERM;
1595
1596 if (count >= sizeof(temp) || count == 0)
1597 return -EINVAL;
1598
1599 if (copy_from_user(temp, buf, count) != 0)
1600 return -EFAULT;
1601
1602 temp[count] = '\0';
1603
1604 if (sscanf(temp, "%d", &i) != 1)
1605 return -EINVAL;
1606
1607 smk_cipso_doi_value = i;
1608
1609 smk_cipso_doi();
1610
1611 return count;
1612}
1613
1614static const struct file_operations smk_doi_ops = {
1615 .read = smk_read_doi,
1616 .write = smk_write_doi,
1617 .llseek = default_llseek,
1618};
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629static ssize_t smk_read_direct(struct file *filp, char __user *buf,
1630 size_t count, loff_t *ppos)
1631{
1632 char temp[80];
1633 ssize_t rc;
1634
1635 if (*ppos != 0)
1636 return 0;
1637
1638 sprintf(temp, "%d", smack_cipso_direct);
1639 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
1640
1641 return rc;
1642}
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653static ssize_t smk_write_direct(struct file *file, const char __user *buf,
1654 size_t count, loff_t *ppos)
1655{
1656 struct smack_known *skp;
1657 char temp[80];
1658 int i;
1659
1660 if (!smack_privileged(CAP_MAC_ADMIN))
1661 return -EPERM;
1662
1663 if (count >= sizeof(temp) || count == 0)
1664 return -EINVAL;
1665
1666 if (copy_from_user(temp, buf, count) != 0)
1667 return -EFAULT;
1668
1669 temp[count] = '\0';
1670
1671 if (sscanf(temp, "%d", &i) != 1)
1672 return -EINVAL;
1673
1674
1675
1676
1677
1678
1679 if (smack_cipso_direct != i) {
1680 mutex_lock(&smack_known_lock);
1681 list_for_each_entry_rcu(skp, &smack_known_list, list)
1682 if (skp->smk_netlabel.attr.mls.lvl ==
1683 smack_cipso_direct)
1684 skp->smk_netlabel.attr.mls.lvl = i;
1685 smack_cipso_direct = i;
1686 mutex_unlock(&smack_known_lock);
1687 }
1688
1689 return count;
1690}
1691
1692static const struct file_operations smk_direct_ops = {
1693 .read = smk_read_direct,
1694 .write = smk_write_direct,
1695 .llseek = default_llseek,
1696};
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707static ssize_t smk_read_mapped(struct file *filp, char __user *buf,
1708 size_t count, loff_t *ppos)
1709{
1710 char temp[80];
1711 ssize_t rc;
1712
1713 if (*ppos != 0)
1714 return 0;
1715
1716 sprintf(temp, "%d", smack_cipso_mapped);
1717 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
1718
1719 return rc;
1720}
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731static ssize_t smk_write_mapped(struct file *file, const char __user *buf,
1732 size_t count, loff_t *ppos)
1733{
1734 struct smack_known *skp;
1735 char temp[80];
1736 int i;
1737
1738 if (!smack_privileged(CAP_MAC_ADMIN))
1739 return -EPERM;
1740
1741 if (count >= sizeof(temp) || count == 0)
1742 return -EINVAL;
1743
1744 if (copy_from_user(temp, buf, count) != 0)
1745 return -EFAULT;
1746
1747 temp[count] = '\0';
1748
1749 if (sscanf(temp, "%d", &i) != 1)
1750 return -EINVAL;
1751
1752
1753
1754
1755
1756
1757 if (smack_cipso_mapped != i) {
1758 mutex_lock(&smack_known_lock);
1759 list_for_each_entry_rcu(skp, &smack_known_list, list)
1760 if (skp->smk_netlabel.attr.mls.lvl ==
1761 smack_cipso_mapped)
1762 skp->smk_netlabel.attr.mls.lvl = i;
1763 smack_cipso_mapped = i;
1764 mutex_unlock(&smack_known_lock);
1765 }
1766
1767 return count;
1768}
1769
1770static const struct file_operations smk_mapped_ops = {
1771 .read = smk_read_mapped,
1772 .write = smk_write_mapped,
1773 .llseek = default_llseek,
1774};
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785static ssize_t smk_read_ambient(struct file *filp, char __user *buf,
1786 size_t cn, loff_t *ppos)
1787{
1788 ssize_t rc;
1789 int asize;
1790
1791 if (*ppos != 0)
1792 return 0;
1793
1794
1795
1796
1797 mutex_lock(&smack_ambient_lock);
1798
1799 asize = strlen(smack_net_ambient->smk_known) + 1;
1800
1801 if (cn >= asize)
1802 rc = simple_read_from_buffer(buf, cn, ppos,
1803 smack_net_ambient->smk_known,
1804 asize);
1805 else
1806 rc = -EINVAL;
1807
1808 mutex_unlock(&smack_ambient_lock);
1809
1810 return rc;
1811}
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822static ssize_t smk_write_ambient(struct file *file, const char __user *buf,
1823 size_t count, loff_t *ppos)
1824{
1825 struct smack_known *skp;
1826 char *oldambient;
1827 char *data;
1828 int rc = count;
1829
1830 if (!smack_privileged(CAP_MAC_ADMIN))
1831 return -EPERM;
1832
1833 data = memdup_user_nul(buf, count);
1834 if (IS_ERR(data))
1835 return PTR_ERR(data);
1836
1837 skp = smk_import_entry(data, count);
1838 if (IS_ERR(skp)) {
1839 rc = PTR_ERR(skp);
1840 goto out;
1841 }
1842
1843 mutex_lock(&smack_ambient_lock);
1844
1845 oldambient = smack_net_ambient->smk_known;
1846 smack_net_ambient = skp;
1847 smk_unlbl_ambient(oldambient);
1848
1849 mutex_unlock(&smack_ambient_lock);
1850
1851out:
1852 kfree(data);
1853 return rc;
1854}
1855
1856static const struct file_operations smk_ambient_ops = {
1857 .read = smk_read_ambient,
1858 .write = smk_write_ambient,
1859 .llseek = default_llseek,
1860};
1861
1862
1863
1864
1865static void *onlycap_seq_start(struct seq_file *s, loff_t *pos)
1866{
1867 return smk_seq_start(s, pos, &smack_onlycap_list);
1868}
1869
1870static void *onlycap_seq_next(struct seq_file *s, void *v, loff_t *pos)
1871{
1872 return smk_seq_next(s, v, pos, &smack_onlycap_list);
1873}
1874
1875static int onlycap_seq_show(struct seq_file *s, void *v)
1876{
1877 struct list_head *list = v;
1878 struct smack_known_list_elem *sklep =
1879 list_entry_rcu(list, struct smack_known_list_elem, list);
1880
1881 seq_puts(s, sklep->smk_label->smk_known);
1882 seq_putc(s, ' ');
1883
1884 return 0;
1885}
1886
1887static const struct seq_operations onlycap_seq_ops = {
1888 .start = onlycap_seq_start,
1889 .next = onlycap_seq_next,
1890 .show = onlycap_seq_show,
1891 .stop = smk_seq_stop,
1892};
1893
1894static int smk_open_onlycap(struct inode *inode, struct file *file)
1895{
1896 return seq_open(file, &onlycap_seq_ops);
1897}
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908static void smk_list_swap_rcu(struct list_head *public,
1909 struct list_head *private)
1910{
1911 struct list_head *first, *last;
1912
1913 if (list_empty(public)) {
1914 list_splice_init_rcu(private, public, synchronize_rcu);
1915 } else {
1916
1917 first = public->next;
1918 last = public->prev;
1919
1920
1921 private->prev->next = public;
1922 private->next->prev = public;
1923 rcu_assign_pointer(public->next, private->next);
1924 public->prev = private->prev;
1925
1926 synchronize_rcu();
1927
1928
1929
1930 private->next = first;
1931 private->prev = last;
1932 first->prev = private;
1933 last->next = private;
1934 }
1935}
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945static int smk_parse_label_list(char *data, struct list_head *list)
1946{
1947 char *tok;
1948 struct smack_known *skp;
1949 struct smack_known_list_elem *sklep;
1950
1951 while ((tok = strsep(&data, " ")) != NULL) {
1952 if (!*tok)
1953 continue;
1954
1955 skp = smk_import_entry(tok, 0);
1956 if (IS_ERR(skp))
1957 return PTR_ERR(skp);
1958
1959 sklep = kzalloc(sizeof(*sklep), GFP_KERNEL);
1960 if (sklep == NULL)
1961 return -ENOMEM;
1962
1963 sklep->smk_label = skp;
1964 list_add(&sklep->list, list);
1965 }
1966
1967 return 0;
1968}
1969
1970
1971
1972
1973
1974void smk_destroy_label_list(struct list_head *list)
1975{
1976 struct smack_known_list_elem *sklep;
1977 struct smack_known_list_elem *sklep2;
1978
1979 list_for_each_entry_safe(sklep, sklep2, list, list)
1980 kfree(sklep);
1981
1982 INIT_LIST_HEAD(list);
1983}
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994static ssize_t smk_write_onlycap(struct file *file, const char __user *buf,
1995 size_t count, loff_t *ppos)
1996{
1997 char *data;
1998 LIST_HEAD(list_tmp);
1999 int rc;
2000
2001 if (!smack_privileged(CAP_MAC_ADMIN))
2002 return -EPERM;
2003
2004 data = memdup_user_nul(buf, count);
2005 if (IS_ERR(data))
2006 return PTR_ERR(data);
2007
2008 rc = smk_parse_label_list(data, &list_tmp);
2009 kfree(data);
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021 if (!rc || (rc == -EINVAL && list_empty(&list_tmp))) {
2022 mutex_lock(&smack_onlycap_lock);
2023 smk_list_swap_rcu(&smack_onlycap_list, &list_tmp);
2024 mutex_unlock(&smack_onlycap_lock);
2025 rc = count;
2026 }
2027
2028 smk_destroy_label_list(&list_tmp);
2029
2030 return rc;
2031}
2032
2033static const struct file_operations smk_onlycap_ops = {
2034 .open = smk_open_onlycap,
2035 .read = seq_read,
2036 .write = smk_write_onlycap,
2037 .llseek = seq_lseek,
2038 .release = seq_release,
2039};
2040
2041#ifdef CONFIG_SECURITY_SMACK_BRINGUP
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051static ssize_t smk_read_unconfined(struct file *filp, char __user *buf,
2052 size_t cn, loff_t *ppos)
2053{
2054 char *smack = "";
2055 ssize_t rc = -EINVAL;
2056 int asize;
2057
2058 if (*ppos != 0)
2059 return 0;
2060
2061 if (smack_unconfined != NULL)
2062 smack = smack_unconfined->smk_known;
2063
2064 asize = strlen(smack) + 1;
2065
2066 if (cn >= asize)
2067 rc = simple_read_from_buffer(buf, cn, ppos, smack, asize);
2068
2069 return rc;
2070}
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081static ssize_t smk_write_unconfined(struct file *file, const char __user *buf,
2082 size_t count, loff_t *ppos)
2083{
2084 char *data;
2085 struct smack_known *skp;
2086 int rc = count;
2087
2088 if (!smack_privileged(CAP_MAC_ADMIN))
2089 return -EPERM;
2090
2091 data = memdup_user_nul(buf, count);
2092 if (IS_ERR(data))
2093 return PTR_ERR(data);
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104 skp = smk_import_entry(data, count);
2105 if (PTR_ERR(skp) == -EINVAL)
2106 skp = NULL;
2107 else if (IS_ERR(skp)) {
2108 rc = PTR_ERR(skp);
2109 goto freeout;
2110 }
2111
2112 smack_unconfined = skp;
2113
2114freeout:
2115 kfree(data);
2116 return rc;
2117}
2118
2119static const struct file_operations smk_unconfined_ops = {
2120 .read = smk_read_unconfined,
2121 .write = smk_write_unconfined,
2122 .llseek = default_llseek,
2123};
2124#endif
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135static ssize_t smk_read_logging(struct file *filp, char __user *buf,
2136 size_t count, loff_t *ppos)
2137{
2138 char temp[32];
2139 ssize_t rc;
2140
2141 if (*ppos != 0)
2142 return 0;
2143
2144 sprintf(temp, "%d\n", log_policy);
2145 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
2146 return rc;
2147}
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158static ssize_t smk_write_logging(struct file *file, const char __user *buf,
2159 size_t count, loff_t *ppos)
2160{
2161 char temp[32];
2162 int i;
2163
2164 if (!smack_privileged(CAP_MAC_ADMIN))
2165 return -EPERM;
2166
2167 if (count >= sizeof(temp) || count == 0)
2168 return -EINVAL;
2169
2170 if (copy_from_user(temp, buf, count) != 0)
2171 return -EFAULT;
2172
2173 temp[count] = '\0';
2174
2175 if (sscanf(temp, "%d", &i) != 1)
2176 return -EINVAL;
2177 if (i < 0 || i > 3)
2178 return -EINVAL;
2179 log_policy = i;
2180 return count;
2181}
2182
2183
2184
2185static const struct file_operations smk_logging_ops = {
2186 .read = smk_read_logging,
2187 .write = smk_write_logging,
2188 .llseek = default_llseek,
2189};
2190
2191
2192
2193
2194
2195static void *load_self_seq_start(struct seq_file *s, loff_t *pos)
2196{
2197 struct task_smack *tsp = smack_cred(current_cred());
2198
2199 return smk_seq_start(s, pos, &tsp->smk_rules);
2200}
2201
2202static void *load_self_seq_next(struct seq_file *s, void *v, loff_t *pos)
2203{
2204 struct task_smack *tsp = smack_cred(current_cred());
2205
2206 return smk_seq_next(s, v, pos, &tsp->smk_rules);
2207}
2208
2209static int load_self_seq_show(struct seq_file *s, void *v)
2210{
2211 struct list_head *list = v;
2212 struct smack_rule *srp =
2213 list_entry_rcu(list, struct smack_rule, list);
2214
2215 smk_rule_show(s, srp, SMK_LABELLEN);
2216
2217 return 0;
2218}
2219
2220static const struct seq_operations load_self_seq_ops = {
2221 .start = load_self_seq_start,
2222 .next = load_self_seq_next,
2223 .show = load_self_seq_show,
2224 .stop = smk_seq_stop,
2225};
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235static int smk_open_load_self(struct inode *inode, struct file *file)
2236{
2237 return seq_open(file, &load_self_seq_ops);
2238}
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248static ssize_t smk_write_load_self(struct file *file, const char __user *buf,
2249 size_t count, loff_t *ppos)
2250{
2251 struct task_smack *tsp = smack_cred(current_cred());
2252
2253 return smk_write_rules_list(file, buf, count, ppos, &tsp->smk_rules,
2254 &tsp->smk_rules_lock, SMK_FIXED24_FMT);
2255}
2256
2257static const struct file_operations smk_load_self_ops = {
2258 .open = smk_open_load_self,
2259 .read = seq_read,
2260 .llseek = seq_lseek,
2261 .write = smk_write_load_self,
2262 .release = seq_release,
2263};
2264
2265
2266
2267
2268
2269
2270
2271
2272static ssize_t smk_user_access(struct file *file, const char __user *buf,
2273 size_t count, loff_t *ppos, int format)
2274{
2275 struct smack_parsed_rule rule;
2276 char *data;
2277 int res;
2278
2279 data = simple_transaction_get(file, buf, count);
2280 if (IS_ERR(data))
2281 return PTR_ERR(data);
2282
2283 if (format == SMK_FIXED24_FMT) {
2284 if (count < SMK_LOADLEN)
2285 return -EINVAL;
2286 res = smk_parse_rule(data, &rule, 0);
2287 } else {
2288
2289
2290
2291 res = smk_parse_long_rule(data, &rule, 0, 3);
2292 }
2293
2294 if (res >= 0)
2295 res = smk_access(rule.smk_subject, rule.smk_object,
2296 rule.smk_access1, NULL);
2297 else if (res != -ENOENT)
2298 return res;
2299
2300
2301
2302
2303 data[0] = res >= 0 ? '1' : '0';
2304 data[1] = '\0';
2305
2306 simple_transaction_set(file, 2);
2307
2308 if (format == SMK_FIXED24_FMT)
2309 return SMK_LOADLEN;
2310 return count;
2311}
2312
2313
2314
2315
2316
2317
2318
2319
2320static ssize_t smk_write_access(struct file *file, const char __user *buf,
2321 size_t count, loff_t *ppos)
2322{
2323 return smk_user_access(file, buf, count, ppos, SMK_FIXED24_FMT);
2324}
2325
2326static const struct file_operations smk_access_ops = {
2327 .write = smk_write_access,
2328 .read = simple_transaction_read,
2329 .release = simple_transaction_release,
2330 .llseek = generic_file_llseek,
2331};
2332
2333
2334
2335
2336
2337
2338static int load2_seq_show(struct seq_file *s, void *v)
2339{
2340 struct list_head *list = v;
2341 struct smack_rule *srp;
2342 struct smack_known *skp =
2343 list_entry_rcu(list, struct smack_known, list);
2344
2345 list_for_each_entry_rcu(srp, &skp->smk_rules, list)
2346 smk_rule_show(s, srp, SMK_LONGLABEL);
2347
2348 return 0;
2349}
2350
2351static const struct seq_operations load2_seq_ops = {
2352 .start = load2_seq_start,
2353 .next = load2_seq_next,
2354 .show = load2_seq_show,
2355 .stop = smk_seq_stop,
2356};
2357
2358
2359
2360
2361
2362
2363
2364
2365static int smk_open_load2(struct inode *inode, struct file *file)
2366{
2367 return seq_open(file, &load2_seq_ops);
2368}
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378static ssize_t smk_write_load2(struct file *file, const char __user *buf,
2379 size_t count, loff_t *ppos)
2380{
2381
2382
2383
2384 if (!smack_privileged(CAP_MAC_ADMIN))
2385 return -EPERM;
2386
2387 return smk_write_rules_list(file, buf, count, ppos, NULL, NULL,
2388 SMK_LONG_FMT);
2389}
2390
2391static const struct file_operations smk_load2_ops = {
2392 .open = smk_open_load2,
2393 .read = seq_read,
2394 .llseek = seq_lseek,
2395 .write = smk_write_load2,
2396 .release = seq_release,
2397};
2398
2399
2400
2401
2402
2403static void *load_self2_seq_start(struct seq_file *s, loff_t *pos)
2404{
2405 struct task_smack *tsp = smack_cred(current_cred());
2406
2407 return smk_seq_start(s, pos, &tsp->smk_rules);
2408}
2409
2410static void *load_self2_seq_next(struct seq_file *s, void *v, loff_t *pos)
2411{
2412 struct task_smack *tsp = smack_cred(current_cred());
2413
2414 return smk_seq_next(s, v, pos, &tsp->smk_rules);
2415}
2416
2417static int load_self2_seq_show(struct seq_file *s, void *v)
2418{
2419 struct list_head *list = v;
2420 struct smack_rule *srp =
2421 list_entry_rcu(list, struct smack_rule, list);
2422
2423 smk_rule_show(s, srp, SMK_LONGLABEL);
2424
2425 return 0;
2426}
2427
2428static const struct seq_operations load_self2_seq_ops = {
2429 .start = load_self2_seq_start,
2430 .next = load_self2_seq_next,
2431 .show = load_self2_seq_show,
2432 .stop = smk_seq_stop,
2433};
2434
2435
2436
2437
2438
2439
2440
2441
2442static int smk_open_load_self2(struct inode *inode, struct file *file)
2443{
2444 return seq_open(file, &load_self2_seq_ops);
2445}
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455static ssize_t smk_write_load_self2(struct file *file, const char __user *buf,
2456 size_t count, loff_t *ppos)
2457{
2458 struct task_smack *tsp = smack_cred(current_cred());
2459
2460 return smk_write_rules_list(file, buf, count, ppos, &tsp->smk_rules,
2461 &tsp->smk_rules_lock, SMK_LONG_FMT);
2462}
2463
2464static const struct file_operations smk_load_self2_ops = {
2465 .open = smk_open_load_self2,
2466 .read = seq_read,
2467 .llseek = seq_lseek,
2468 .write = smk_write_load_self2,
2469 .release = seq_release,
2470};
2471
2472
2473
2474
2475
2476
2477
2478
2479static ssize_t smk_write_access2(struct file *file, const char __user *buf,
2480 size_t count, loff_t *ppos)
2481{
2482 return smk_user_access(file, buf, count, ppos, SMK_LONG_FMT);
2483}
2484
2485static const struct file_operations smk_access2_ops = {
2486 .write = smk_write_access2,
2487 .read = simple_transaction_read,
2488 .release = simple_transaction_release,
2489 .llseek = generic_file_llseek,
2490};
2491
2492
2493
2494
2495
2496
2497
2498
2499static ssize_t smk_write_revoke_subj(struct file *file, const char __user *buf,
2500 size_t count, loff_t *ppos)
2501{
2502 char *data;
2503 const char *cp;
2504 struct smack_known *skp;
2505 struct smack_rule *sp;
2506 struct list_head *rule_list;
2507 struct mutex *rule_lock;
2508 int rc = count;
2509
2510 if (*ppos != 0)
2511 return -EINVAL;
2512
2513 if (!smack_privileged(CAP_MAC_ADMIN))
2514 return -EPERM;
2515
2516 if (count == 0 || count > SMK_LONGLABEL)
2517 return -EINVAL;
2518
2519 data = memdup_user(buf, count);
2520 if (IS_ERR(data))
2521 return PTR_ERR(data);
2522
2523 cp = smk_parse_smack(data, count);
2524 if (IS_ERR(cp)) {
2525 rc = PTR_ERR(cp);
2526 goto out_data;
2527 }
2528
2529 skp = smk_find_entry(cp);
2530 if (skp == NULL)
2531 goto out_cp;
2532
2533 rule_list = &skp->smk_rules;
2534 rule_lock = &skp->smk_rules_lock;
2535
2536 mutex_lock(rule_lock);
2537
2538 list_for_each_entry_rcu(sp, rule_list, list)
2539 sp->smk_access = 0;
2540
2541 mutex_unlock(rule_lock);
2542
2543out_cp:
2544 kfree(cp);
2545out_data:
2546 kfree(data);
2547
2548 return rc;
2549}
2550
2551static const struct file_operations smk_revoke_subj_ops = {
2552 .write = smk_write_revoke_subj,
2553 .read = simple_transaction_read,
2554 .release = simple_transaction_release,
2555 .llseek = generic_file_llseek,
2556};
2557
2558
2559
2560
2561
2562static int smk_init_sysfs(void)
2563{
2564 return sysfs_create_mount_point(fs_kobj, "smackfs");
2565}
2566
2567
2568
2569
2570
2571
2572
2573
2574static ssize_t smk_write_change_rule(struct file *file, const char __user *buf,
2575 size_t count, loff_t *ppos)
2576{
2577
2578
2579
2580 if (!smack_privileged(CAP_MAC_ADMIN))
2581 return -EPERM;
2582
2583 return smk_write_rules_list(file, buf, count, ppos, NULL, NULL,
2584 SMK_CHANGE_FMT);
2585}
2586
2587static const struct file_operations smk_change_rule_ops = {
2588 .write = smk_write_change_rule,
2589 .read = simple_transaction_read,
2590 .release = simple_transaction_release,
2591 .llseek = generic_file_llseek,
2592};
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603static ssize_t smk_read_syslog(struct file *filp, char __user *buf,
2604 size_t cn, loff_t *ppos)
2605{
2606 struct smack_known *skp;
2607 ssize_t rc = -EINVAL;
2608 int asize;
2609
2610 if (*ppos != 0)
2611 return 0;
2612
2613 if (smack_syslog_label == NULL)
2614 skp = &smack_known_star;
2615 else
2616 skp = smack_syslog_label;
2617
2618 asize = strlen(skp->smk_known) + 1;
2619
2620 if (cn >= asize)
2621 rc = simple_read_from_buffer(buf, cn, ppos, skp->smk_known,
2622 asize);
2623
2624 return rc;
2625}
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636static ssize_t smk_write_syslog(struct file *file, const char __user *buf,
2637 size_t count, loff_t *ppos)
2638{
2639 char *data;
2640 struct smack_known *skp;
2641 int rc = count;
2642
2643 if (!smack_privileged(CAP_MAC_ADMIN))
2644 return -EPERM;
2645
2646 data = memdup_user_nul(buf, count);
2647 if (IS_ERR(data))
2648 return PTR_ERR(data);
2649
2650 skp = smk_import_entry(data, count);
2651 if (IS_ERR(skp))
2652 rc = PTR_ERR(skp);
2653 else
2654 smack_syslog_label = skp;
2655
2656 kfree(data);
2657 return rc;
2658}
2659
2660static const struct file_operations smk_syslog_ops = {
2661 .read = smk_read_syslog,
2662 .write = smk_write_syslog,
2663 .llseek = default_llseek,
2664};
2665
2666
2667
2668
2669
2670static void *relabel_self_seq_start(struct seq_file *s, loff_t *pos)
2671{
2672 struct task_smack *tsp = smack_cred(current_cred());
2673
2674 return smk_seq_start(s, pos, &tsp->smk_relabel);
2675}
2676
2677static void *relabel_self_seq_next(struct seq_file *s, void *v, loff_t *pos)
2678{
2679 struct task_smack *tsp = smack_cred(current_cred());
2680
2681 return smk_seq_next(s, v, pos, &tsp->smk_relabel);
2682}
2683
2684static int relabel_self_seq_show(struct seq_file *s, void *v)
2685{
2686 struct list_head *list = v;
2687 struct smack_known_list_elem *sklep =
2688 list_entry(list, struct smack_known_list_elem, list);
2689
2690 seq_puts(s, sklep->smk_label->smk_known);
2691 seq_putc(s, ' ');
2692
2693 return 0;
2694}
2695
2696static const struct seq_operations relabel_self_seq_ops = {
2697 .start = relabel_self_seq_start,
2698 .next = relabel_self_seq_next,
2699 .show = relabel_self_seq_show,
2700 .stop = smk_seq_stop,
2701};
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711static int smk_open_relabel_self(struct inode *inode, struct file *file)
2712{
2713 return seq_open(file, &relabel_self_seq_ops);
2714}
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724static ssize_t smk_write_relabel_self(struct file *file, const char __user *buf,
2725 size_t count, loff_t *ppos)
2726{
2727 char *data;
2728 int rc;
2729 LIST_HEAD(list_tmp);
2730
2731
2732
2733
2734 if (!smack_privileged(CAP_MAC_ADMIN))
2735 return -EPERM;
2736
2737
2738
2739
2740 if (*ppos != 0)
2741 return -EINVAL;
2742
2743 data = memdup_user_nul(buf, count);
2744 if (IS_ERR(data))
2745 return PTR_ERR(data);
2746
2747 rc = smk_parse_label_list(data, &list_tmp);
2748 kfree(data);
2749
2750 if (!rc || (rc == -EINVAL && list_empty(&list_tmp))) {
2751 struct cred *new;
2752 struct task_smack *tsp;
2753
2754 new = prepare_creds();
2755 if (!new) {
2756 rc = -ENOMEM;
2757 goto out;
2758 }
2759 tsp = smack_cred(new);
2760 smk_destroy_label_list(&tsp->smk_relabel);
2761 list_splice(&list_tmp, &tsp->smk_relabel);
2762 commit_creds(new);
2763 return count;
2764 }
2765out:
2766 smk_destroy_label_list(&list_tmp);
2767 return rc;
2768}
2769
2770static const struct file_operations smk_relabel_self_ops = {
2771 .open = smk_open_relabel_self,
2772 .read = seq_read,
2773 .llseek = seq_lseek,
2774 .write = smk_write_relabel_self,
2775 .release = seq_release,
2776};
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787static ssize_t smk_read_ptrace(struct file *filp, char __user *buf,
2788 size_t count, loff_t *ppos)
2789{
2790 char temp[32];
2791 ssize_t rc;
2792
2793 if (*ppos != 0)
2794 return 0;
2795
2796 sprintf(temp, "%d\n", smack_ptrace_rule);
2797 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
2798 return rc;
2799}
2800
2801
2802
2803
2804
2805
2806
2807
2808static ssize_t smk_write_ptrace(struct file *file, const char __user *buf,
2809 size_t count, loff_t *ppos)
2810{
2811 char temp[32];
2812 int i;
2813
2814 if (!smack_privileged(CAP_MAC_ADMIN))
2815 return -EPERM;
2816
2817 if (*ppos != 0 || count >= sizeof(temp) || count == 0)
2818 return -EINVAL;
2819
2820 if (copy_from_user(temp, buf, count) != 0)
2821 return -EFAULT;
2822
2823 temp[count] = '\0';
2824
2825 if (sscanf(temp, "%d", &i) != 1)
2826 return -EINVAL;
2827 if (i < SMACK_PTRACE_DEFAULT || i > SMACK_PTRACE_MAX)
2828 return -EINVAL;
2829 smack_ptrace_rule = i;
2830
2831 return count;
2832}
2833
2834static const struct file_operations smk_ptrace_ops = {
2835 .write = smk_write_ptrace,
2836 .read = smk_read_ptrace,
2837 .llseek = default_llseek,
2838};
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849static int smk_fill_super(struct super_block *sb, struct fs_context *fc)
2850{
2851 int rc;
2852
2853 static const struct tree_descr smack_files[] = {
2854 [SMK_LOAD] = {
2855 "load", &smk_load_ops, S_IRUGO|S_IWUSR},
2856 [SMK_CIPSO] = {
2857 "cipso", &smk_cipso_ops, S_IRUGO|S_IWUSR},
2858 [SMK_DOI] = {
2859 "doi", &smk_doi_ops, S_IRUGO|S_IWUSR},
2860 [SMK_DIRECT] = {
2861 "direct", &smk_direct_ops, S_IRUGO|S_IWUSR},
2862 [SMK_AMBIENT] = {
2863 "ambient", &smk_ambient_ops, S_IRUGO|S_IWUSR},
2864 [SMK_NET4ADDR] = {
2865 "netlabel", &smk_net4addr_ops, S_IRUGO|S_IWUSR},
2866 [SMK_ONLYCAP] = {
2867 "onlycap", &smk_onlycap_ops, S_IRUGO|S_IWUSR},
2868 [SMK_LOGGING] = {
2869 "logging", &smk_logging_ops, S_IRUGO|S_IWUSR},
2870 [SMK_LOAD_SELF] = {
2871 "load-self", &smk_load_self_ops, S_IRUGO|S_IWUGO},
2872 [SMK_ACCESSES] = {
2873 "access", &smk_access_ops, S_IRUGO|S_IWUGO},
2874 [SMK_MAPPED] = {
2875 "mapped", &smk_mapped_ops, S_IRUGO|S_IWUSR},
2876 [SMK_LOAD2] = {
2877 "load2", &smk_load2_ops, S_IRUGO|S_IWUSR},
2878 [SMK_LOAD_SELF2] = {
2879 "load-self2", &smk_load_self2_ops, S_IRUGO|S_IWUGO},
2880 [SMK_ACCESS2] = {
2881 "access2", &smk_access2_ops, S_IRUGO|S_IWUGO},
2882 [SMK_CIPSO2] = {
2883 "cipso2", &smk_cipso2_ops, S_IRUGO|S_IWUSR},
2884 [SMK_REVOKE_SUBJ] = {
2885 "revoke-subject", &smk_revoke_subj_ops,
2886 S_IRUGO|S_IWUSR},
2887 [SMK_CHANGE_RULE] = {
2888 "change-rule", &smk_change_rule_ops, S_IRUGO|S_IWUSR},
2889 [SMK_SYSLOG] = {
2890 "syslog", &smk_syslog_ops, S_IRUGO|S_IWUSR},
2891 [SMK_PTRACE] = {
2892 "ptrace", &smk_ptrace_ops, S_IRUGO|S_IWUSR},
2893#ifdef CONFIG_SECURITY_SMACK_BRINGUP
2894 [SMK_UNCONFINED] = {
2895 "unconfined", &smk_unconfined_ops, S_IRUGO|S_IWUSR},
2896#endif
2897#if IS_ENABLED(CONFIG_IPV6)
2898 [SMK_NET6ADDR] = {
2899 "ipv6host", &smk_net6addr_ops, S_IRUGO|S_IWUSR},
2900#endif
2901 [SMK_RELABEL_SELF] = {
2902 "relabel-self", &smk_relabel_self_ops,
2903 S_IRUGO|S_IWUGO},
2904
2905 {""}
2906 };
2907
2908 rc = simple_fill_super(sb, SMACK_MAGIC, smack_files);
2909 if (rc != 0) {
2910 printk(KERN_ERR "%s failed %d while creating inodes\n",
2911 __func__, rc);
2912 return rc;
2913 }
2914
2915 return 0;
2916}
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926static int smk_get_tree(struct fs_context *fc)
2927{
2928 return get_tree_single(fc, smk_fill_super);
2929}
2930
2931static const struct fs_context_operations smk_context_ops = {
2932 .get_tree = smk_get_tree,
2933};
2934
2935
2936
2937
2938
2939static int smk_init_fs_context(struct fs_context *fc)
2940{
2941 fc->ops = &smk_context_ops;
2942 return 0;
2943}
2944
2945static struct file_system_type smk_fs_type = {
2946 .name = "smackfs",
2947 .init_fs_context = smk_init_fs_context,
2948 .kill_sb = kill_litter_super,
2949};
2950
2951static struct vfsmount *smackfs_mount;
2952
2953static int __init smk_preset_netlabel(struct smack_known *skp)
2954{
2955 skp->smk_netlabel.domain = skp->smk_known;
2956 skp->smk_netlabel.flags =
2957 NETLBL_SECATTR_DOMAIN | NETLBL_SECATTR_MLS_LVL;
2958 return smk_netlbl_mls(smack_cipso_direct, skp->smk_known,
2959 &skp->smk_netlabel, strlen(skp->smk_known));
2960}
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975static int __init init_smk_fs(void)
2976{
2977 int err;
2978 int rc;
2979
2980 if (smack_enabled == 0)
2981 return 0;
2982
2983 err = smk_init_sysfs();
2984 if (err)
2985 printk(KERN_ERR "smackfs: sysfs mountpoint problem.\n");
2986
2987 err = register_filesystem(&smk_fs_type);
2988 if (!err) {
2989 smackfs_mount = kern_mount(&smk_fs_type);
2990 if (IS_ERR(smackfs_mount)) {
2991 printk(KERN_ERR "smackfs: could not mount!\n");
2992 err = PTR_ERR(smackfs_mount);
2993 smackfs_mount = NULL;
2994 }
2995 }
2996
2997 smk_cipso_doi();
2998 smk_unlbl_ambient(NULL);
2999
3000 rc = smk_preset_netlabel(&smack_known_floor);
3001 if (err == 0 && rc < 0)
3002 err = rc;
3003 rc = smk_preset_netlabel(&smack_known_hat);
3004 if (err == 0 && rc < 0)
3005 err = rc;
3006 rc = smk_preset_netlabel(&smack_known_huh);
3007 if (err == 0 && rc < 0)
3008 err = rc;
3009 rc = smk_preset_netlabel(&smack_known_star);
3010 if (err == 0 && rc < 0)
3011 err = rc;
3012 rc = smk_preset_netlabel(&smack_known_web);
3013 if (err == 0 && rc < 0)
3014 err = rc;
3015
3016 return err;
3017}
3018
3019__initcall(init_smk_fs);
3020