This source file includes following definitions.
- policydb_lookup_compat
- perm_destroy
- common_destroy
- constraint_expr_destroy
- cls_destroy
- role_destroy
- type_destroy
- user_destroy
- sens_destroy
- cat_destroy
- filenametr_destroy
- range_tr_destroy
- ocontext_destroy
- roles_init
- filenametr_hash
- filenametr_cmp
- rangetr_hash
- rangetr_cmp
- policydb_init
- common_index
- class_index
- role_index
- type_index
- user_index
- sens_index
- cat_index
- hash_eval
- symtab_hash_eval
- hash_eval
- policydb_index
- policydb_destroy
- policydb_load_isids
- policydb_class_isvalid
- policydb_role_isvalid
- policydb_type_isvalid
- policydb_context_isvalid
- mls_read_range_helper
- context_read_and_validate
- str_read
- perm_read
- common_read
- type_set_init
- type_set_read
- read_cons_helper
- class_read
- role_read
- type_read
- mls_read_level
- user_read
- sens_read
- cat_read
- user_bounds_sanity_check
- role_bounds_sanity_check
- type_bounds_sanity_check
- policydb_bounds_sanity_check
- string_to_security_class
- string_to_av_perm
- range_read
- filename_trans_read
- genfs_read
- ocontext_read
- policydb_read
- mls_write_level
- mls_write_range_helper
- sens_write
- cat_write
- role_trans_write
- role_allow_write
- context_write
- perm_write
- common_write
- type_set_write
- write_cons_helper
- class_write
- role_write
- type_write
- user_write
- ocontext_write
- genfs_write
- hashtab_cnt
- range_write_helper
- range_write
- filename_write_helper
- filename_trans_write
- policydb_write
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31 #include <linux/kernel.h>
32 #include <linux/sched.h>
33 #include <linux/slab.h>
34 #include <linux/string.h>
35 #include <linux/errno.h>
36 #include <linux/audit.h>
37 #include "security.h"
38
39 #include "policydb.h"
40 #include "conditional.h"
41 #include "mls.h"
42 #include "services.h"
43
44 #define _DEBUG_HASHES
45
46 #ifdef DEBUG_HASHES
47 static const char *symtab_name[SYM_NUM] = {
48 "common prefixes",
49 "classes",
50 "roles",
51 "types",
52 "users",
53 "bools",
54 "levels",
55 "categories",
56 };
57 #endif
58
59 static unsigned int symtab_sizes[SYM_NUM] = {
60 2,
61 32,
62 16,
63 512,
64 128,
65 16,
66 16,
67 16,
68 };
69
70 struct policydb_compat_info {
71 int version;
72 int sym_num;
73 int ocon_num;
74 };
75
76
77 static struct policydb_compat_info policydb_compat[] = {
78 {
79 .version = POLICYDB_VERSION_BASE,
80 .sym_num = SYM_NUM - 3,
81 .ocon_num = OCON_NUM - 3,
82 },
83 {
84 .version = POLICYDB_VERSION_BOOL,
85 .sym_num = SYM_NUM - 2,
86 .ocon_num = OCON_NUM - 3,
87 },
88 {
89 .version = POLICYDB_VERSION_IPV6,
90 .sym_num = SYM_NUM - 2,
91 .ocon_num = OCON_NUM - 2,
92 },
93 {
94 .version = POLICYDB_VERSION_NLCLASS,
95 .sym_num = SYM_NUM - 2,
96 .ocon_num = OCON_NUM - 2,
97 },
98 {
99 .version = POLICYDB_VERSION_MLS,
100 .sym_num = SYM_NUM,
101 .ocon_num = OCON_NUM - 2,
102 },
103 {
104 .version = POLICYDB_VERSION_AVTAB,
105 .sym_num = SYM_NUM,
106 .ocon_num = OCON_NUM - 2,
107 },
108 {
109 .version = POLICYDB_VERSION_RANGETRANS,
110 .sym_num = SYM_NUM,
111 .ocon_num = OCON_NUM - 2,
112 },
113 {
114 .version = POLICYDB_VERSION_POLCAP,
115 .sym_num = SYM_NUM,
116 .ocon_num = OCON_NUM - 2,
117 },
118 {
119 .version = POLICYDB_VERSION_PERMISSIVE,
120 .sym_num = SYM_NUM,
121 .ocon_num = OCON_NUM - 2,
122 },
123 {
124 .version = POLICYDB_VERSION_BOUNDARY,
125 .sym_num = SYM_NUM,
126 .ocon_num = OCON_NUM - 2,
127 },
128 {
129 .version = POLICYDB_VERSION_FILENAME_TRANS,
130 .sym_num = SYM_NUM,
131 .ocon_num = OCON_NUM - 2,
132 },
133 {
134 .version = POLICYDB_VERSION_ROLETRANS,
135 .sym_num = SYM_NUM,
136 .ocon_num = OCON_NUM - 2,
137 },
138 {
139 .version = POLICYDB_VERSION_NEW_OBJECT_DEFAULTS,
140 .sym_num = SYM_NUM,
141 .ocon_num = OCON_NUM - 2,
142 },
143 {
144 .version = POLICYDB_VERSION_DEFAULT_TYPE,
145 .sym_num = SYM_NUM,
146 .ocon_num = OCON_NUM - 2,
147 },
148 {
149 .version = POLICYDB_VERSION_CONSTRAINT_NAMES,
150 .sym_num = SYM_NUM,
151 .ocon_num = OCON_NUM - 2,
152 },
153 {
154 .version = POLICYDB_VERSION_XPERMS_IOCTL,
155 .sym_num = SYM_NUM,
156 .ocon_num = OCON_NUM - 2,
157 },
158 {
159 .version = POLICYDB_VERSION_INFINIBAND,
160 .sym_num = SYM_NUM,
161 .ocon_num = OCON_NUM,
162 },
163 };
164
165 static struct policydb_compat_info *policydb_lookup_compat(int version)
166 {
167 int i;
168 struct policydb_compat_info *info = NULL;
169
170 for (i = 0; i < ARRAY_SIZE(policydb_compat); i++) {
171 if (policydb_compat[i].version == version) {
172 info = &policydb_compat[i];
173 break;
174 }
175 }
176 return info;
177 }
178
179
180
181
182
183
184
185 static int perm_destroy(void *key, void *datum, void *p)
186 {
187 kfree(key);
188 kfree(datum);
189 return 0;
190 }
191
192 static int common_destroy(void *key, void *datum, void *p)
193 {
194 struct common_datum *comdatum;
195
196 kfree(key);
197 if (datum) {
198 comdatum = datum;
199 hashtab_map(comdatum->permissions.table, perm_destroy, NULL);
200 hashtab_destroy(comdatum->permissions.table);
201 }
202 kfree(datum);
203 return 0;
204 }
205
206 static void constraint_expr_destroy(struct constraint_expr *expr)
207 {
208 if (expr) {
209 ebitmap_destroy(&expr->names);
210 if (expr->type_names) {
211 ebitmap_destroy(&expr->type_names->types);
212 ebitmap_destroy(&expr->type_names->negset);
213 kfree(expr->type_names);
214 }
215 kfree(expr);
216 }
217 }
218
219 static int cls_destroy(void *key, void *datum, void *p)
220 {
221 struct class_datum *cladatum;
222 struct constraint_node *constraint, *ctemp;
223 struct constraint_expr *e, *etmp;
224
225 kfree(key);
226 if (datum) {
227 cladatum = datum;
228 hashtab_map(cladatum->permissions.table, perm_destroy, NULL);
229 hashtab_destroy(cladatum->permissions.table);
230 constraint = cladatum->constraints;
231 while (constraint) {
232 e = constraint->expr;
233 while (e) {
234 etmp = e;
235 e = e->next;
236 constraint_expr_destroy(etmp);
237 }
238 ctemp = constraint;
239 constraint = constraint->next;
240 kfree(ctemp);
241 }
242
243 constraint = cladatum->validatetrans;
244 while (constraint) {
245 e = constraint->expr;
246 while (e) {
247 etmp = e;
248 e = e->next;
249 constraint_expr_destroy(etmp);
250 }
251 ctemp = constraint;
252 constraint = constraint->next;
253 kfree(ctemp);
254 }
255 kfree(cladatum->comkey);
256 }
257 kfree(datum);
258 return 0;
259 }
260
261 static int role_destroy(void *key, void *datum, void *p)
262 {
263 struct role_datum *role;
264
265 kfree(key);
266 if (datum) {
267 role = datum;
268 ebitmap_destroy(&role->dominates);
269 ebitmap_destroy(&role->types);
270 }
271 kfree(datum);
272 return 0;
273 }
274
275 static int type_destroy(void *key, void *datum, void *p)
276 {
277 kfree(key);
278 kfree(datum);
279 return 0;
280 }
281
282 static int user_destroy(void *key, void *datum, void *p)
283 {
284 struct user_datum *usrdatum;
285
286 kfree(key);
287 if (datum) {
288 usrdatum = datum;
289 ebitmap_destroy(&usrdatum->roles);
290 ebitmap_destroy(&usrdatum->range.level[0].cat);
291 ebitmap_destroy(&usrdatum->range.level[1].cat);
292 ebitmap_destroy(&usrdatum->dfltlevel.cat);
293 }
294 kfree(datum);
295 return 0;
296 }
297
298 static int sens_destroy(void *key, void *datum, void *p)
299 {
300 struct level_datum *levdatum;
301
302 kfree(key);
303 if (datum) {
304 levdatum = datum;
305 if (levdatum->level)
306 ebitmap_destroy(&levdatum->level->cat);
307 kfree(levdatum->level);
308 }
309 kfree(datum);
310 return 0;
311 }
312
313 static int cat_destroy(void *key, void *datum, void *p)
314 {
315 kfree(key);
316 kfree(datum);
317 return 0;
318 }
319
320 static int (*destroy_f[SYM_NUM]) (void *key, void *datum, void *datap) =
321 {
322 common_destroy,
323 cls_destroy,
324 role_destroy,
325 type_destroy,
326 user_destroy,
327 cond_destroy_bool,
328 sens_destroy,
329 cat_destroy,
330 };
331
332 static int filenametr_destroy(void *key, void *datum, void *p)
333 {
334 struct filename_trans *ft = key;
335
336 kfree(ft->name);
337 kfree(key);
338 kfree(datum);
339 cond_resched();
340 return 0;
341 }
342
343 static int range_tr_destroy(void *key, void *datum, void *p)
344 {
345 struct mls_range *rt = datum;
346
347 kfree(key);
348 ebitmap_destroy(&rt->level[0].cat);
349 ebitmap_destroy(&rt->level[1].cat);
350 kfree(datum);
351 cond_resched();
352 return 0;
353 }
354
355 static void ocontext_destroy(struct ocontext *c, int i)
356 {
357 if (!c)
358 return;
359
360 context_destroy(&c->context[0]);
361 context_destroy(&c->context[1]);
362 if (i == OCON_ISID || i == OCON_FS ||
363 i == OCON_NETIF || i == OCON_FSUSE)
364 kfree(c->u.name);
365 kfree(c);
366 }
367
368
369
370
371 static int roles_init(struct policydb *p)
372 {
373 char *key = NULL;
374 int rc;
375 struct role_datum *role;
376
377 role = kzalloc(sizeof(*role), GFP_KERNEL);
378 if (!role)
379 return -ENOMEM;
380
381 rc = -EINVAL;
382 role->value = ++p->p_roles.nprim;
383 if (role->value != OBJECT_R_VAL)
384 goto out;
385
386 rc = -ENOMEM;
387 key = kstrdup(OBJECT_R, GFP_KERNEL);
388 if (!key)
389 goto out;
390
391 rc = hashtab_insert(p->p_roles.table, key, role);
392 if (rc)
393 goto out;
394
395 return 0;
396 out:
397 kfree(key);
398 kfree(role);
399 return rc;
400 }
401
402 static u32 filenametr_hash(struct hashtab *h, const void *k)
403 {
404 const struct filename_trans *ft = k;
405 unsigned long hash;
406 unsigned int byte_num;
407 unsigned char focus;
408
409 hash = ft->stype ^ ft->ttype ^ ft->tclass;
410
411 byte_num = 0;
412 while ((focus = ft->name[byte_num++]))
413 hash = partial_name_hash(focus, hash);
414 return hash & (h->size - 1);
415 }
416
417 static int filenametr_cmp(struct hashtab *h, const void *k1, const void *k2)
418 {
419 const struct filename_trans *ft1 = k1;
420 const struct filename_trans *ft2 = k2;
421 int v;
422
423 v = ft1->stype - ft2->stype;
424 if (v)
425 return v;
426
427 v = ft1->ttype - ft2->ttype;
428 if (v)
429 return v;
430
431 v = ft1->tclass - ft2->tclass;
432 if (v)
433 return v;
434
435 return strcmp(ft1->name, ft2->name);
436
437 }
438
439 static u32 rangetr_hash(struct hashtab *h, const void *k)
440 {
441 const struct range_trans *key = k;
442
443 return (key->source_type + (key->target_type << 3) +
444 (key->target_class << 5)) & (h->size - 1);
445 }
446
447 static int rangetr_cmp(struct hashtab *h, const void *k1, const void *k2)
448 {
449 const struct range_trans *key1 = k1, *key2 = k2;
450 int v;
451
452 v = key1->source_type - key2->source_type;
453 if (v)
454 return v;
455
456 v = key1->target_type - key2->target_type;
457 if (v)
458 return v;
459
460 v = key1->target_class - key2->target_class;
461
462 return v;
463 }
464
465
466
467
468 static int policydb_init(struct policydb *p)
469 {
470 int i, rc;
471
472 memset(p, 0, sizeof(*p));
473
474 for (i = 0; i < SYM_NUM; i++) {
475 rc = symtab_init(&p->symtab[i], symtab_sizes[i]);
476 if (rc)
477 goto out;
478 }
479
480 rc = avtab_init(&p->te_avtab);
481 if (rc)
482 goto out;
483
484 rc = roles_init(p);
485 if (rc)
486 goto out;
487
488 rc = cond_policydb_init(p);
489 if (rc)
490 goto out;
491
492 p->filename_trans = hashtab_create(filenametr_hash, filenametr_cmp,
493 (1 << 10));
494 if (!p->filename_trans) {
495 rc = -ENOMEM;
496 goto out;
497 }
498
499 p->range_tr = hashtab_create(rangetr_hash, rangetr_cmp, 256);
500 if (!p->range_tr) {
501 rc = -ENOMEM;
502 goto out;
503 }
504
505 ebitmap_init(&p->filename_trans_ttypes);
506 ebitmap_init(&p->policycaps);
507 ebitmap_init(&p->permissive_map);
508
509 return 0;
510 out:
511 hashtab_destroy(p->filename_trans);
512 hashtab_destroy(p->range_tr);
513 for (i = 0; i < SYM_NUM; i++) {
514 hashtab_map(p->symtab[i].table, destroy_f[i], NULL);
515 hashtab_destroy(p->symtab[i].table);
516 }
517 return rc;
518 }
519
520
521
522
523
524
525
526
527
528
529
530 static int common_index(void *key, void *datum, void *datap)
531 {
532 struct policydb *p;
533 struct common_datum *comdatum;
534
535 comdatum = datum;
536 p = datap;
537 if (!comdatum->value || comdatum->value > p->p_commons.nprim)
538 return -EINVAL;
539
540 p->sym_val_to_name[SYM_COMMONS][comdatum->value - 1] = key;
541
542 return 0;
543 }
544
545 static int class_index(void *key, void *datum, void *datap)
546 {
547 struct policydb *p;
548 struct class_datum *cladatum;
549
550 cladatum = datum;
551 p = datap;
552 if (!cladatum->value || cladatum->value > p->p_classes.nprim)
553 return -EINVAL;
554
555 p->sym_val_to_name[SYM_CLASSES][cladatum->value - 1] = key;
556 p->class_val_to_struct[cladatum->value - 1] = cladatum;
557 return 0;
558 }
559
560 static int role_index(void *key, void *datum, void *datap)
561 {
562 struct policydb *p;
563 struct role_datum *role;
564
565 role = datum;
566 p = datap;
567 if (!role->value
568 || role->value > p->p_roles.nprim
569 || role->bounds > p->p_roles.nprim)
570 return -EINVAL;
571
572 p->sym_val_to_name[SYM_ROLES][role->value - 1] = key;
573 p->role_val_to_struct[role->value - 1] = role;
574 return 0;
575 }
576
577 static int type_index(void *key, void *datum, void *datap)
578 {
579 struct policydb *p;
580 struct type_datum *typdatum;
581
582 typdatum = datum;
583 p = datap;
584
585 if (typdatum->primary) {
586 if (!typdatum->value
587 || typdatum->value > p->p_types.nprim
588 || typdatum->bounds > p->p_types.nprim)
589 return -EINVAL;
590 p->sym_val_to_name[SYM_TYPES][typdatum->value - 1] = key;
591 p->type_val_to_struct[typdatum->value - 1] = typdatum;
592 }
593
594 return 0;
595 }
596
597 static int user_index(void *key, void *datum, void *datap)
598 {
599 struct policydb *p;
600 struct user_datum *usrdatum;
601
602 usrdatum = datum;
603 p = datap;
604 if (!usrdatum->value
605 || usrdatum->value > p->p_users.nprim
606 || usrdatum->bounds > p->p_users.nprim)
607 return -EINVAL;
608
609 p->sym_val_to_name[SYM_USERS][usrdatum->value - 1] = key;
610 p->user_val_to_struct[usrdatum->value - 1] = usrdatum;
611 return 0;
612 }
613
614 static int sens_index(void *key, void *datum, void *datap)
615 {
616 struct policydb *p;
617 struct level_datum *levdatum;
618
619 levdatum = datum;
620 p = datap;
621
622 if (!levdatum->isalias) {
623 if (!levdatum->level->sens ||
624 levdatum->level->sens > p->p_levels.nprim)
625 return -EINVAL;
626
627 p->sym_val_to_name[SYM_LEVELS][levdatum->level->sens - 1] = key;
628 }
629
630 return 0;
631 }
632
633 static int cat_index(void *key, void *datum, void *datap)
634 {
635 struct policydb *p;
636 struct cat_datum *catdatum;
637
638 catdatum = datum;
639 p = datap;
640
641 if (!catdatum->isalias) {
642 if (!catdatum->value || catdatum->value > p->p_cats.nprim)
643 return -EINVAL;
644
645 p->sym_val_to_name[SYM_CATS][catdatum->value - 1] = key;
646 }
647
648 return 0;
649 }
650
651 static int (*index_f[SYM_NUM]) (void *key, void *datum, void *datap) =
652 {
653 common_index,
654 class_index,
655 role_index,
656 type_index,
657 user_index,
658 cond_index_bool,
659 sens_index,
660 cat_index,
661 };
662
663 #ifdef DEBUG_HASHES
664 static void hash_eval(struct hashtab *h, const char *hash_name)
665 {
666 struct hashtab_info info;
667
668 hashtab_stat(h, &info);
669 pr_debug("SELinux: %s: %d entries and %d/%d buckets used, longest chain length %d\n",
670 hash_name, h->nel, info.slots_used, h->size,
671 info.max_chain_len);
672 }
673
674 static void symtab_hash_eval(struct symtab *s)
675 {
676 int i;
677
678 for (i = 0; i < SYM_NUM; i++)
679 hash_eval(s[i].table, symtab_name[i]);
680 }
681
682 #else
683 static inline void hash_eval(struct hashtab *h, char *hash_name)
684 {
685 }
686 #endif
687
688
689
690
691
692
693
694 static int policydb_index(struct policydb *p)
695 {
696 int i, rc;
697
698 if (p->mls_enabled)
699 pr_debug("SELinux: %d users, %d roles, %d types, %d bools, %d sens, %d cats\n",
700 p->p_users.nprim, p->p_roles.nprim, p->p_types.nprim,
701 p->p_bools.nprim, p->p_levels.nprim, p->p_cats.nprim);
702 else
703 pr_debug("SELinux: %d users, %d roles, %d types, %d bools\n",
704 p->p_users.nprim, p->p_roles.nprim, p->p_types.nprim,
705 p->p_bools.nprim);
706
707 pr_debug("SELinux: %d classes, %d rules\n",
708 p->p_classes.nprim, p->te_avtab.nel);
709
710 #ifdef DEBUG_HASHES
711 avtab_hash_eval(&p->te_avtab, "rules");
712 symtab_hash_eval(p->symtab);
713 #endif
714
715 p->class_val_to_struct = kcalloc(p->p_classes.nprim,
716 sizeof(*p->class_val_to_struct),
717 GFP_KERNEL);
718 if (!p->class_val_to_struct)
719 return -ENOMEM;
720
721 p->role_val_to_struct = kcalloc(p->p_roles.nprim,
722 sizeof(*p->role_val_to_struct),
723 GFP_KERNEL);
724 if (!p->role_val_to_struct)
725 return -ENOMEM;
726
727 p->user_val_to_struct = kcalloc(p->p_users.nprim,
728 sizeof(*p->user_val_to_struct),
729 GFP_KERNEL);
730 if (!p->user_val_to_struct)
731 return -ENOMEM;
732
733 p->type_val_to_struct = kvcalloc(p->p_types.nprim,
734 sizeof(*p->type_val_to_struct),
735 GFP_KERNEL);
736 if (!p->type_val_to_struct)
737 return -ENOMEM;
738
739 rc = cond_init_bool_indexes(p);
740 if (rc)
741 goto out;
742
743 for (i = 0; i < SYM_NUM; i++) {
744 p->sym_val_to_name[i] = kvcalloc(p->symtab[i].nprim,
745 sizeof(char *),
746 GFP_KERNEL);
747 if (!p->sym_val_to_name[i])
748 return -ENOMEM;
749
750 rc = hashtab_map(p->symtab[i].table, index_f[i], p);
751 if (rc)
752 goto out;
753 }
754 rc = 0;
755 out:
756 return rc;
757 }
758
759
760
761
762 void policydb_destroy(struct policydb *p)
763 {
764 struct ocontext *c, *ctmp;
765 struct genfs *g, *gtmp;
766 int i;
767 struct role_allow *ra, *lra = NULL;
768 struct role_trans *tr, *ltr = NULL;
769
770 for (i = 0; i < SYM_NUM; i++) {
771 cond_resched();
772 hashtab_map(p->symtab[i].table, destroy_f[i], NULL);
773 hashtab_destroy(p->symtab[i].table);
774 }
775
776 for (i = 0; i < SYM_NUM; i++)
777 kvfree(p->sym_val_to_name[i]);
778
779 kfree(p->class_val_to_struct);
780 kfree(p->role_val_to_struct);
781 kfree(p->user_val_to_struct);
782 kvfree(p->type_val_to_struct);
783
784 avtab_destroy(&p->te_avtab);
785
786 for (i = 0; i < OCON_NUM; i++) {
787 cond_resched();
788 c = p->ocontexts[i];
789 while (c) {
790 ctmp = c;
791 c = c->next;
792 ocontext_destroy(ctmp, i);
793 }
794 p->ocontexts[i] = NULL;
795 }
796
797 g = p->genfs;
798 while (g) {
799 cond_resched();
800 kfree(g->fstype);
801 c = g->head;
802 while (c) {
803 ctmp = c;
804 c = c->next;
805 ocontext_destroy(ctmp, OCON_FSUSE);
806 }
807 gtmp = g;
808 g = g->next;
809 kfree(gtmp);
810 }
811 p->genfs = NULL;
812
813 cond_policydb_destroy(p);
814
815 for (tr = p->role_tr; tr; tr = tr->next) {
816 cond_resched();
817 kfree(ltr);
818 ltr = tr;
819 }
820 kfree(ltr);
821
822 for (ra = p->role_allow; ra; ra = ra->next) {
823 cond_resched();
824 kfree(lra);
825 lra = ra;
826 }
827 kfree(lra);
828
829 hashtab_map(p->filename_trans, filenametr_destroy, NULL);
830 hashtab_destroy(p->filename_trans);
831
832 hashtab_map(p->range_tr, range_tr_destroy, NULL);
833 hashtab_destroy(p->range_tr);
834
835 if (p->type_attr_map_array) {
836 for (i = 0; i < p->p_types.nprim; i++)
837 ebitmap_destroy(&p->type_attr_map_array[i]);
838 kvfree(p->type_attr_map_array);
839 }
840
841 ebitmap_destroy(&p->filename_trans_ttypes);
842 ebitmap_destroy(&p->policycaps);
843 ebitmap_destroy(&p->permissive_map);
844 }
845
846
847
848
849
850 int policydb_load_isids(struct policydb *p, struct sidtab *s)
851 {
852 struct ocontext *head, *c;
853 int rc;
854
855 rc = sidtab_init(s);
856 if (rc) {
857 pr_err("SELinux: out of memory on SID table init\n");
858 goto out;
859 }
860
861 head = p->ocontexts[OCON_ISID];
862 for (c = head; c; c = c->next) {
863 rc = -EINVAL;
864 if (!c->context[0].user) {
865 pr_err("SELinux: SID %s was never defined.\n",
866 c->u.name);
867 sidtab_destroy(s);
868 goto out;
869 }
870 if (c->sid[0] == SECSID_NULL || c->sid[0] > SECINITSID_NUM) {
871 pr_err("SELinux: Initial SID %s out of range.\n",
872 c->u.name);
873 sidtab_destroy(s);
874 goto out;
875 }
876
877 rc = sidtab_set_initial(s, c->sid[0], &c->context[0]);
878 if (rc) {
879 pr_err("SELinux: unable to load initial SID %s.\n",
880 c->u.name);
881 sidtab_destroy(s);
882 goto out;
883 }
884 }
885 rc = 0;
886 out:
887 return rc;
888 }
889
890 int policydb_class_isvalid(struct policydb *p, unsigned int class)
891 {
892 if (!class || class > p->p_classes.nprim)
893 return 0;
894 return 1;
895 }
896
897 int policydb_role_isvalid(struct policydb *p, unsigned int role)
898 {
899 if (!role || role > p->p_roles.nprim)
900 return 0;
901 return 1;
902 }
903
904 int policydb_type_isvalid(struct policydb *p, unsigned int type)
905 {
906 if (!type || type > p->p_types.nprim)
907 return 0;
908 return 1;
909 }
910
911
912
913
914
915 int policydb_context_isvalid(struct policydb *p, struct context *c)
916 {
917 struct role_datum *role;
918 struct user_datum *usrdatum;
919
920 if (!c->role || c->role > p->p_roles.nprim)
921 return 0;
922
923 if (!c->user || c->user > p->p_users.nprim)
924 return 0;
925
926 if (!c->type || c->type > p->p_types.nprim)
927 return 0;
928
929 if (c->role != OBJECT_R_VAL) {
930
931
932
933 role = p->role_val_to_struct[c->role - 1];
934 if (!role || !ebitmap_get_bit(&role->types, c->type - 1))
935
936 return 0;
937
938
939
940
941 usrdatum = p->user_val_to_struct[c->user - 1];
942 if (!usrdatum)
943 return 0;
944
945 if (!ebitmap_get_bit(&usrdatum->roles, c->role - 1))
946
947 return 0;
948 }
949
950 if (!mls_context_isvalid(p, c))
951 return 0;
952
953 return 1;
954 }
955
956
957
958
959
960 static int mls_read_range_helper(struct mls_range *r, void *fp)
961 {
962 __le32 buf[2];
963 u32 items;
964 int rc;
965
966 rc = next_entry(buf, fp, sizeof(u32));
967 if (rc)
968 goto out;
969
970 rc = -EINVAL;
971 items = le32_to_cpu(buf[0]);
972 if (items > ARRAY_SIZE(buf)) {
973 pr_err("SELinux: mls: range overflow\n");
974 goto out;
975 }
976
977 rc = next_entry(buf, fp, sizeof(u32) * items);
978 if (rc) {
979 pr_err("SELinux: mls: truncated range\n");
980 goto out;
981 }
982
983 r->level[0].sens = le32_to_cpu(buf[0]);
984 if (items > 1)
985 r->level[1].sens = le32_to_cpu(buf[1]);
986 else
987 r->level[1].sens = r->level[0].sens;
988
989 rc = ebitmap_read(&r->level[0].cat, fp);
990 if (rc) {
991 pr_err("SELinux: mls: error reading low categories\n");
992 goto out;
993 }
994 if (items > 1) {
995 rc = ebitmap_read(&r->level[1].cat, fp);
996 if (rc) {
997 pr_err("SELinux: mls: error reading high categories\n");
998 goto bad_high;
999 }
1000 } else {
1001 rc = ebitmap_cpy(&r->level[1].cat, &r->level[0].cat);
1002 if (rc) {
1003 pr_err("SELinux: mls: out of memory\n");
1004 goto bad_high;
1005 }
1006 }
1007
1008 return 0;
1009 bad_high:
1010 ebitmap_destroy(&r->level[0].cat);
1011 out:
1012 return rc;
1013 }
1014
1015
1016
1017
1018
1019 static int context_read_and_validate(struct context *c,
1020 struct policydb *p,
1021 void *fp)
1022 {
1023 __le32 buf[3];
1024 int rc;
1025
1026 rc = next_entry(buf, fp, sizeof buf);
1027 if (rc) {
1028 pr_err("SELinux: context truncated\n");
1029 goto out;
1030 }
1031 c->user = le32_to_cpu(buf[0]);
1032 c->role = le32_to_cpu(buf[1]);
1033 c->type = le32_to_cpu(buf[2]);
1034 if (p->policyvers >= POLICYDB_VERSION_MLS) {
1035 rc = mls_read_range_helper(&c->range, fp);
1036 if (rc) {
1037 pr_err("SELinux: error reading MLS range of context\n");
1038 goto out;
1039 }
1040 }
1041
1042 rc = -EINVAL;
1043 if (!policydb_context_isvalid(p, c)) {
1044 pr_err("SELinux: invalid security context\n");
1045 context_destroy(c);
1046 goto out;
1047 }
1048 rc = 0;
1049 out:
1050 return rc;
1051 }
1052
1053
1054
1055
1056
1057
1058
1059 static int str_read(char **strp, gfp_t flags, void *fp, u32 len)
1060 {
1061 int rc;
1062 char *str;
1063
1064 if ((len == 0) || (len == (u32)-1))
1065 return -EINVAL;
1066
1067 str = kmalloc(len + 1, flags | __GFP_NOWARN);
1068 if (!str)
1069 return -ENOMEM;
1070
1071
1072 *strp = str;
1073
1074 rc = next_entry(str, fp, len);
1075 if (rc)
1076 return rc;
1077
1078 str[len] = '\0';
1079 return 0;
1080 }
1081
1082 static int perm_read(struct policydb *p, struct hashtab *h, void *fp)
1083 {
1084 char *key = NULL;
1085 struct perm_datum *perdatum;
1086 int rc;
1087 __le32 buf[2];
1088 u32 len;
1089
1090 perdatum = kzalloc(sizeof(*perdatum), GFP_KERNEL);
1091 if (!perdatum)
1092 return -ENOMEM;
1093
1094 rc = next_entry(buf, fp, sizeof buf);
1095 if (rc)
1096 goto bad;
1097
1098 len = le32_to_cpu(buf[0]);
1099 perdatum->value = le32_to_cpu(buf[1]);
1100
1101 rc = str_read(&key, GFP_KERNEL, fp, len);
1102 if (rc)
1103 goto bad;
1104
1105 rc = hashtab_insert(h, key, perdatum);
1106 if (rc)
1107 goto bad;
1108
1109 return 0;
1110 bad:
1111 perm_destroy(key, perdatum, NULL);
1112 return rc;
1113 }
1114
1115 static int common_read(struct policydb *p, struct hashtab *h, void *fp)
1116 {
1117 char *key = NULL;
1118 struct common_datum *comdatum;
1119 __le32 buf[4];
1120 u32 len, nel;
1121 int i, rc;
1122
1123 comdatum = kzalloc(sizeof(*comdatum), GFP_KERNEL);
1124 if (!comdatum)
1125 return -ENOMEM;
1126
1127 rc = next_entry(buf, fp, sizeof buf);
1128 if (rc)
1129 goto bad;
1130
1131 len = le32_to_cpu(buf[0]);
1132 comdatum->value = le32_to_cpu(buf[1]);
1133
1134 rc = symtab_init(&comdatum->permissions, PERM_SYMTAB_SIZE);
1135 if (rc)
1136 goto bad;
1137 comdatum->permissions.nprim = le32_to_cpu(buf[2]);
1138 nel = le32_to_cpu(buf[3]);
1139
1140 rc = str_read(&key, GFP_KERNEL, fp, len);
1141 if (rc)
1142 goto bad;
1143
1144 for (i = 0; i < nel; i++) {
1145 rc = perm_read(p, comdatum->permissions.table, fp);
1146 if (rc)
1147 goto bad;
1148 }
1149
1150 rc = hashtab_insert(h, key, comdatum);
1151 if (rc)
1152 goto bad;
1153 return 0;
1154 bad:
1155 common_destroy(key, comdatum, NULL);
1156 return rc;
1157 }
1158
1159 static void type_set_init(struct type_set *t)
1160 {
1161 ebitmap_init(&t->types);
1162 ebitmap_init(&t->negset);
1163 }
1164
1165 static int type_set_read(struct type_set *t, void *fp)
1166 {
1167 __le32 buf[1];
1168 int rc;
1169
1170 if (ebitmap_read(&t->types, fp))
1171 return -EINVAL;
1172 if (ebitmap_read(&t->negset, fp))
1173 return -EINVAL;
1174
1175 rc = next_entry(buf, fp, sizeof(u32));
1176 if (rc < 0)
1177 return -EINVAL;
1178 t->flags = le32_to_cpu(buf[0]);
1179
1180 return 0;
1181 }
1182
1183
1184 static int read_cons_helper(struct policydb *p,
1185 struct constraint_node **nodep,
1186 int ncons, int allowxtarget, void *fp)
1187 {
1188 struct constraint_node *c, *lc;
1189 struct constraint_expr *e, *le;
1190 __le32 buf[3];
1191 u32 nexpr;
1192 int rc, i, j, depth;
1193
1194 lc = NULL;
1195 for (i = 0; i < ncons; i++) {
1196 c = kzalloc(sizeof(*c), GFP_KERNEL);
1197 if (!c)
1198 return -ENOMEM;
1199
1200 if (lc)
1201 lc->next = c;
1202 else
1203 *nodep = c;
1204
1205 rc = next_entry(buf, fp, (sizeof(u32) * 2));
1206 if (rc)
1207 return rc;
1208 c->permissions = le32_to_cpu(buf[0]);
1209 nexpr = le32_to_cpu(buf[1]);
1210 le = NULL;
1211 depth = -1;
1212 for (j = 0; j < nexpr; j++) {
1213 e = kzalloc(sizeof(*e), GFP_KERNEL);
1214 if (!e)
1215 return -ENOMEM;
1216
1217 if (le)
1218 le->next = e;
1219 else
1220 c->expr = e;
1221
1222 rc = next_entry(buf, fp, (sizeof(u32) * 3));
1223 if (rc)
1224 return rc;
1225 e->expr_type = le32_to_cpu(buf[0]);
1226 e->attr = le32_to_cpu(buf[1]);
1227 e->op = le32_to_cpu(buf[2]);
1228
1229 switch (e->expr_type) {
1230 case CEXPR_NOT:
1231 if (depth < 0)
1232 return -EINVAL;
1233 break;
1234 case CEXPR_AND:
1235 case CEXPR_OR:
1236 if (depth < 1)
1237 return -EINVAL;
1238 depth--;
1239 break;
1240 case CEXPR_ATTR:
1241 if (depth == (CEXPR_MAXDEPTH - 1))
1242 return -EINVAL;
1243 depth++;
1244 break;
1245 case CEXPR_NAMES:
1246 if (!allowxtarget && (e->attr & CEXPR_XTARGET))
1247 return -EINVAL;
1248 if (depth == (CEXPR_MAXDEPTH - 1))
1249 return -EINVAL;
1250 depth++;
1251 rc = ebitmap_read(&e->names, fp);
1252 if (rc)
1253 return rc;
1254 if (p->policyvers >=
1255 POLICYDB_VERSION_CONSTRAINT_NAMES) {
1256 e->type_names = kzalloc(sizeof
1257 (*e->type_names),
1258 GFP_KERNEL);
1259 if (!e->type_names)
1260 return -ENOMEM;
1261 type_set_init(e->type_names);
1262 rc = type_set_read(e->type_names, fp);
1263 if (rc)
1264 return rc;
1265 }
1266 break;
1267 default:
1268 return -EINVAL;
1269 }
1270 le = e;
1271 }
1272 if (depth != 0)
1273 return -EINVAL;
1274 lc = c;
1275 }
1276
1277 return 0;
1278 }
1279
1280 static int class_read(struct policydb *p, struct hashtab *h, void *fp)
1281 {
1282 char *key = NULL;
1283 struct class_datum *cladatum;
1284 __le32 buf[6];
1285 u32 len, len2, ncons, nel;
1286 int i, rc;
1287
1288 cladatum = kzalloc(sizeof(*cladatum), GFP_KERNEL);
1289 if (!cladatum)
1290 return -ENOMEM;
1291
1292 rc = next_entry(buf, fp, sizeof(u32)*6);
1293 if (rc)
1294 goto bad;
1295
1296 len = le32_to_cpu(buf[0]);
1297 len2 = le32_to_cpu(buf[1]);
1298 cladatum->value = le32_to_cpu(buf[2]);
1299
1300 rc = symtab_init(&cladatum->permissions, PERM_SYMTAB_SIZE);
1301 if (rc)
1302 goto bad;
1303 cladatum->permissions.nprim = le32_to_cpu(buf[3]);
1304 nel = le32_to_cpu(buf[4]);
1305
1306 ncons = le32_to_cpu(buf[5]);
1307
1308 rc = str_read(&key, GFP_KERNEL, fp, len);
1309 if (rc)
1310 goto bad;
1311
1312 if (len2) {
1313 rc = str_read(&cladatum->comkey, GFP_KERNEL, fp, len2);
1314 if (rc)
1315 goto bad;
1316
1317 rc = -EINVAL;
1318 cladatum->comdatum = hashtab_search(p->p_commons.table, cladatum->comkey);
1319 if (!cladatum->comdatum) {
1320 pr_err("SELinux: unknown common %s\n",
1321 cladatum->comkey);
1322 goto bad;
1323 }
1324 }
1325 for (i = 0; i < nel; i++) {
1326 rc = perm_read(p, cladatum->permissions.table, fp);
1327 if (rc)
1328 goto bad;
1329 }
1330
1331 rc = read_cons_helper(p, &cladatum->constraints, ncons, 0, fp);
1332 if (rc)
1333 goto bad;
1334
1335 if (p->policyvers >= POLICYDB_VERSION_VALIDATETRANS) {
1336
1337 rc = next_entry(buf, fp, sizeof(u32));
1338 if (rc)
1339 goto bad;
1340 ncons = le32_to_cpu(buf[0]);
1341 rc = read_cons_helper(p, &cladatum->validatetrans,
1342 ncons, 1, fp);
1343 if (rc)
1344 goto bad;
1345 }
1346
1347 if (p->policyvers >= POLICYDB_VERSION_NEW_OBJECT_DEFAULTS) {
1348 rc = next_entry(buf, fp, sizeof(u32) * 3);
1349 if (rc)
1350 goto bad;
1351
1352 cladatum->default_user = le32_to_cpu(buf[0]);
1353 cladatum->default_role = le32_to_cpu(buf[1]);
1354 cladatum->default_range = le32_to_cpu(buf[2]);
1355 }
1356
1357 if (p->policyvers >= POLICYDB_VERSION_DEFAULT_TYPE) {
1358 rc = next_entry(buf, fp, sizeof(u32) * 1);
1359 if (rc)
1360 goto bad;
1361 cladatum->default_type = le32_to_cpu(buf[0]);
1362 }
1363
1364 rc = hashtab_insert(h, key, cladatum);
1365 if (rc)
1366 goto bad;
1367
1368 return 0;
1369 bad:
1370 cls_destroy(key, cladatum, NULL);
1371 return rc;
1372 }
1373
1374 static int role_read(struct policydb *p, struct hashtab *h, void *fp)
1375 {
1376 char *key = NULL;
1377 struct role_datum *role;
1378 int rc, to_read = 2;
1379 __le32 buf[3];
1380 u32 len;
1381
1382 role = kzalloc(sizeof(*role), GFP_KERNEL);
1383 if (!role)
1384 return -ENOMEM;
1385
1386 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1387 to_read = 3;
1388
1389 rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1390 if (rc)
1391 goto bad;
1392
1393 len = le32_to_cpu(buf[0]);
1394 role->value = le32_to_cpu(buf[1]);
1395 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1396 role->bounds = le32_to_cpu(buf[2]);
1397
1398 rc = str_read(&key, GFP_KERNEL, fp, len);
1399 if (rc)
1400 goto bad;
1401
1402 rc = ebitmap_read(&role->dominates, fp);
1403 if (rc)
1404 goto bad;
1405
1406 rc = ebitmap_read(&role->types, fp);
1407 if (rc)
1408 goto bad;
1409
1410 if (strcmp(key, OBJECT_R) == 0) {
1411 rc = -EINVAL;
1412 if (role->value != OBJECT_R_VAL) {
1413 pr_err("SELinux: Role %s has wrong value %d\n",
1414 OBJECT_R, role->value);
1415 goto bad;
1416 }
1417 rc = 0;
1418 goto bad;
1419 }
1420
1421 rc = hashtab_insert(h, key, role);
1422 if (rc)
1423 goto bad;
1424 return 0;
1425 bad:
1426 role_destroy(key, role, NULL);
1427 return rc;
1428 }
1429
1430 static int type_read(struct policydb *p, struct hashtab *h, void *fp)
1431 {
1432 char *key = NULL;
1433 struct type_datum *typdatum;
1434 int rc, to_read = 3;
1435 __le32 buf[4];
1436 u32 len;
1437
1438 typdatum = kzalloc(sizeof(*typdatum), GFP_KERNEL);
1439 if (!typdatum)
1440 return -ENOMEM;
1441
1442 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1443 to_read = 4;
1444
1445 rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1446 if (rc)
1447 goto bad;
1448
1449 len = le32_to_cpu(buf[0]);
1450 typdatum->value = le32_to_cpu(buf[1]);
1451 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) {
1452 u32 prop = le32_to_cpu(buf[2]);
1453
1454 if (prop & TYPEDATUM_PROPERTY_PRIMARY)
1455 typdatum->primary = 1;
1456 if (prop & TYPEDATUM_PROPERTY_ATTRIBUTE)
1457 typdatum->attribute = 1;
1458
1459 typdatum->bounds = le32_to_cpu(buf[3]);
1460 } else {
1461 typdatum->primary = le32_to_cpu(buf[2]);
1462 }
1463
1464 rc = str_read(&key, GFP_KERNEL, fp, len);
1465 if (rc)
1466 goto bad;
1467
1468 rc = hashtab_insert(h, key, typdatum);
1469 if (rc)
1470 goto bad;
1471 return 0;
1472 bad:
1473 type_destroy(key, typdatum, NULL);
1474 return rc;
1475 }
1476
1477
1478
1479
1480
1481
1482 static int mls_read_level(struct mls_level *lp, void *fp)
1483 {
1484 __le32 buf[1];
1485 int rc;
1486
1487 memset(lp, 0, sizeof(*lp));
1488
1489 rc = next_entry(buf, fp, sizeof buf);
1490 if (rc) {
1491 pr_err("SELinux: mls: truncated level\n");
1492 return rc;
1493 }
1494 lp->sens = le32_to_cpu(buf[0]);
1495
1496 rc = ebitmap_read(&lp->cat, fp);
1497 if (rc) {
1498 pr_err("SELinux: mls: error reading level categories\n");
1499 return rc;
1500 }
1501 return 0;
1502 }
1503
1504 static int user_read(struct policydb *p, struct hashtab *h, void *fp)
1505 {
1506 char *key = NULL;
1507 struct user_datum *usrdatum;
1508 int rc, to_read = 2;
1509 __le32 buf[3];
1510 u32 len;
1511
1512 usrdatum = kzalloc(sizeof(*usrdatum), GFP_KERNEL);
1513 if (!usrdatum)
1514 return -ENOMEM;
1515
1516 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1517 to_read = 3;
1518
1519 rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1520 if (rc)
1521 goto bad;
1522
1523 len = le32_to_cpu(buf[0]);
1524 usrdatum->value = le32_to_cpu(buf[1]);
1525 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1526 usrdatum->bounds = le32_to_cpu(buf[2]);
1527
1528 rc = str_read(&key, GFP_KERNEL, fp, len);
1529 if (rc)
1530 goto bad;
1531
1532 rc = ebitmap_read(&usrdatum->roles, fp);
1533 if (rc)
1534 goto bad;
1535
1536 if (p->policyvers >= POLICYDB_VERSION_MLS) {
1537 rc = mls_read_range_helper(&usrdatum->range, fp);
1538 if (rc)
1539 goto bad;
1540 rc = mls_read_level(&usrdatum->dfltlevel, fp);
1541 if (rc)
1542 goto bad;
1543 }
1544
1545 rc = hashtab_insert(h, key, usrdatum);
1546 if (rc)
1547 goto bad;
1548 return 0;
1549 bad:
1550 user_destroy(key, usrdatum, NULL);
1551 return rc;
1552 }
1553
1554 static int sens_read(struct policydb *p, struct hashtab *h, void *fp)
1555 {
1556 char *key = NULL;
1557 struct level_datum *levdatum;
1558 int rc;
1559 __le32 buf[2];
1560 u32 len;
1561
1562 levdatum = kzalloc(sizeof(*levdatum), GFP_ATOMIC);
1563 if (!levdatum)
1564 return -ENOMEM;
1565
1566 rc = next_entry(buf, fp, sizeof buf);
1567 if (rc)
1568 goto bad;
1569
1570 len = le32_to_cpu(buf[0]);
1571 levdatum->isalias = le32_to_cpu(buf[1]);
1572
1573 rc = str_read(&key, GFP_ATOMIC, fp, len);
1574 if (rc)
1575 goto bad;
1576
1577 rc = -ENOMEM;
1578 levdatum->level = kmalloc(sizeof(*levdatum->level), GFP_ATOMIC);
1579 if (!levdatum->level)
1580 goto bad;
1581
1582 rc = mls_read_level(levdatum->level, fp);
1583 if (rc)
1584 goto bad;
1585
1586 rc = hashtab_insert(h, key, levdatum);
1587 if (rc)
1588 goto bad;
1589 return 0;
1590 bad:
1591 sens_destroy(key, levdatum, NULL);
1592 return rc;
1593 }
1594
1595 static int cat_read(struct policydb *p, struct hashtab *h, void *fp)
1596 {
1597 char *key = NULL;
1598 struct cat_datum *catdatum;
1599 int rc;
1600 __le32 buf[3];
1601 u32 len;
1602
1603 catdatum = kzalloc(sizeof(*catdatum), GFP_ATOMIC);
1604 if (!catdatum)
1605 return -ENOMEM;
1606
1607 rc = next_entry(buf, fp, sizeof buf);
1608 if (rc)
1609 goto bad;
1610
1611 len = le32_to_cpu(buf[0]);
1612 catdatum->value = le32_to_cpu(buf[1]);
1613 catdatum->isalias = le32_to_cpu(buf[2]);
1614
1615 rc = str_read(&key, GFP_ATOMIC, fp, len);
1616 if (rc)
1617 goto bad;
1618
1619 rc = hashtab_insert(h, key, catdatum);
1620 if (rc)
1621 goto bad;
1622 return 0;
1623 bad:
1624 cat_destroy(key, catdatum, NULL);
1625 return rc;
1626 }
1627
1628 static int (*read_f[SYM_NUM]) (struct policydb *p, struct hashtab *h, void *fp) =
1629 {
1630 common_read,
1631 class_read,
1632 role_read,
1633 type_read,
1634 user_read,
1635 cond_read_bool,
1636 sens_read,
1637 cat_read,
1638 };
1639
1640 static int user_bounds_sanity_check(void *key, void *datum, void *datap)
1641 {
1642 struct user_datum *upper, *user;
1643 struct policydb *p = datap;
1644 int depth = 0;
1645
1646 upper = user = datum;
1647 while (upper->bounds) {
1648 struct ebitmap_node *node;
1649 unsigned long bit;
1650
1651 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1652 pr_err("SELinux: user %s: "
1653 "too deep or looped boundary",
1654 (char *) key);
1655 return -EINVAL;
1656 }
1657
1658 upper = p->user_val_to_struct[upper->bounds - 1];
1659 ebitmap_for_each_positive_bit(&user->roles, node, bit) {
1660 if (ebitmap_get_bit(&upper->roles, bit))
1661 continue;
1662
1663 pr_err("SELinux: boundary violated policy: "
1664 "user=%s role=%s bounds=%s\n",
1665 sym_name(p, SYM_USERS, user->value - 1),
1666 sym_name(p, SYM_ROLES, bit),
1667 sym_name(p, SYM_USERS, upper->value - 1));
1668
1669 return -EINVAL;
1670 }
1671 }
1672
1673 return 0;
1674 }
1675
1676 static int role_bounds_sanity_check(void *key, void *datum, void *datap)
1677 {
1678 struct role_datum *upper, *role;
1679 struct policydb *p = datap;
1680 int depth = 0;
1681
1682 upper = role = datum;
1683 while (upper->bounds) {
1684 struct ebitmap_node *node;
1685 unsigned long bit;
1686
1687 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1688 pr_err("SELinux: role %s: "
1689 "too deep or looped bounds\n",
1690 (char *) key);
1691 return -EINVAL;
1692 }
1693
1694 upper = p->role_val_to_struct[upper->bounds - 1];
1695 ebitmap_for_each_positive_bit(&role->types, node, bit) {
1696 if (ebitmap_get_bit(&upper->types, bit))
1697 continue;
1698
1699 pr_err("SELinux: boundary violated policy: "
1700 "role=%s type=%s bounds=%s\n",
1701 sym_name(p, SYM_ROLES, role->value - 1),
1702 sym_name(p, SYM_TYPES, bit),
1703 sym_name(p, SYM_ROLES, upper->value - 1));
1704
1705 return -EINVAL;
1706 }
1707 }
1708
1709 return 0;
1710 }
1711
1712 static int type_bounds_sanity_check(void *key, void *datum, void *datap)
1713 {
1714 struct type_datum *upper;
1715 struct policydb *p = datap;
1716 int depth = 0;
1717
1718 upper = datum;
1719 while (upper->bounds) {
1720 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1721 pr_err("SELinux: type %s: "
1722 "too deep or looped boundary\n",
1723 (char *) key);
1724 return -EINVAL;
1725 }
1726
1727 upper = p->type_val_to_struct[upper->bounds - 1];
1728 BUG_ON(!upper);
1729
1730 if (upper->attribute) {
1731 pr_err("SELinux: type %s: "
1732 "bounded by attribute %s",
1733 (char *) key,
1734 sym_name(p, SYM_TYPES, upper->value - 1));
1735 return -EINVAL;
1736 }
1737 }
1738
1739 return 0;
1740 }
1741
1742 static int policydb_bounds_sanity_check(struct policydb *p)
1743 {
1744 int rc;
1745
1746 if (p->policyvers < POLICYDB_VERSION_BOUNDARY)
1747 return 0;
1748
1749 rc = hashtab_map(p->p_users.table,
1750 user_bounds_sanity_check, p);
1751 if (rc)
1752 return rc;
1753
1754 rc = hashtab_map(p->p_roles.table,
1755 role_bounds_sanity_check, p);
1756 if (rc)
1757 return rc;
1758
1759 rc = hashtab_map(p->p_types.table,
1760 type_bounds_sanity_check, p);
1761 if (rc)
1762 return rc;
1763
1764 return 0;
1765 }
1766
1767 u16 string_to_security_class(struct policydb *p, const char *name)
1768 {
1769 struct class_datum *cladatum;
1770
1771 cladatum = hashtab_search(p->p_classes.table, name);
1772 if (!cladatum)
1773 return 0;
1774
1775 return cladatum->value;
1776 }
1777
1778 u32 string_to_av_perm(struct policydb *p, u16 tclass, const char *name)
1779 {
1780 struct class_datum *cladatum;
1781 struct perm_datum *perdatum = NULL;
1782 struct common_datum *comdatum;
1783
1784 if (!tclass || tclass > p->p_classes.nprim)
1785 return 0;
1786
1787 cladatum = p->class_val_to_struct[tclass-1];
1788 comdatum = cladatum->comdatum;
1789 if (comdatum)
1790 perdatum = hashtab_search(comdatum->permissions.table,
1791 name);
1792 if (!perdatum)
1793 perdatum = hashtab_search(cladatum->permissions.table,
1794 name);
1795 if (!perdatum)
1796 return 0;
1797
1798 return 1U << (perdatum->value-1);
1799 }
1800
1801 static int range_read(struct policydb *p, void *fp)
1802 {
1803 struct range_trans *rt = NULL;
1804 struct mls_range *r = NULL;
1805 int i, rc;
1806 __le32 buf[2];
1807 u32 nel;
1808
1809 if (p->policyvers < POLICYDB_VERSION_MLS)
1810 return 0;
1811
1812 rc = next_entry(buf, fp, sizeof(u32));
1813 if (rc)
1814 return rc;
1815
1816 nel = le32_to_cpu(buf[0]);
1817 for (i = 0; i < nel; i++) {
1818 rc = -ENOMEM;
1819 rt = kzalloc(sizeof(*rt), GFP_KERNEL);
1820 if (!rt)
1821 goto out;
1822
1823 rc = next_entry(buf, fp, (sizeof(u32) * 2));
1824 if (rc)
1825 goto out;
1826
1827 rt->source_type = le32_to_cpu(buf[0]);
1828 rt->target_type = le32_to_cpu(buf[1]);
1829 if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) {
1830 rc = next_entry(buf, fp, sizeof(u32));
1831 if (rc)
1832 goto out;
1833 rt->target_class = le32_to_cpu(buf[0]);
1834 } else
1835 rt->target_class = p->process_class;
1836
1837 rc = -EINVAL;
1838 if (!policydb_type_isvalid(p, rt->source_type) ||
1839 !policydb_type_isvalid(p, rt->target_type) ||
1840 !policydb_class_isvalid(p, rt->target_class))
1841 goto out;
1842
1843 rc = -ENOMEM;
1844 r = kzalloc(sizeof(*r), GFP_KERNEL);
1845 if (!r)
1846 goto out;
1847
1848 rc = mls_read_range_helper(r, fp);
1849 if (rc)
1850 goto out;
1851
1852 rc = -EINVAL;
1853 if (!mls_range_isvalid(p, r)) {
1854 pr_warn("SELinux: rangetrans: invalid range\n");
1855 goto out;
1856 }
1857
1858 rc = hashtab_insert(p->range_tr, rt, r);
1859 if (rc)
1860 goto out;
1861
1862 rt = NULL;
1863 r = NULL;
1864 }
1865 hash_eval(p->range_tr, "rangetr");
1866 rc = 0;
1867 out:
1868 kfree(rt);
1869 kfree(r);
1870 return rc;
1871 }
1872
1873 static int filename_trans_read(struct policydb *p, void *fp)
1874 {
1875 struct filename_trans *ft;
1876 struct filename_trans_datum *otype;
1877 char *name;
1878 u32 nel, len;
1879 __le32 buf[4];
1880 int rc, i;
1881
1882 if (p->policyvers < POLICYDB_VERSION_FILENAME_TRANS)
1883 return 0;
1884
1885 rc = next_entry(buf, fp, sizeof(u32));
1886 if (rc)
1887 return rc;
1888 nel = le32_to_cpu(buf[0]);
1889
1890 for (i = 0; i < nel; i++) {
1891 otype = NULL;
1892 name = NULL;
1893
1894 rc = -ENOMEM;
1895 ft = kzalloc(sizeof(*ft), GFP_KERNEL);
1896 if (!ft)
1897 goto out;
1898
1899 rc = -ENOMEM;
1900 otype = kmalloc(sizeof(*otype), GFP_KERNEL);
1901 if (!otype)
1902 goto out;
1903
1904
1905 rc = next_entry(buf, fp, sizeof(u32));
1906 if (rc)
1907 goto out;
1908 len = le32_to_cpu(buf[0]);
1909
1910
1911 rc = str_read(&name, GFP_KERNEL, fp, len);
1912 if (rc)
1913 goto out;
1914
1915 ft->name = name;
1916
1917 rc = next_entry(buf, fp, sizeof(u32) * 4);
1918 if (rc)
1919 goto out;
1920
1921 ft->stype = le32_to_cpu(buf[0]);
1922 ft->ttype = le32_to_cpu(buf[1]);
1923 ft->tclass = le32_to_cpu(buf[2]);
1924
1925 otype->otype = le32_to_cpu(buf[3]);
1926
1927 rc = ebitmap_set_bit(&p->filename_trans_ttypes, ft->ttype, 1);
1928 if (rc)
1929 goto out;
1930
1931 rc = hashtab_insert(p->filename_trans, ft, otype);
1932 if (rc) {
1933
1934
1935
1936
1937 if (rc != -EEXIST)
1938 goto out;
1939
1940 kfree(ft);
1941 kfree(name);
1942 kfree(otype);
1943 }
1944 }
1945 hash_eval(p->filename_trans, "filenametr");
1946 return 0;
1947 out:
1948 kfree(ft);
1949 kfree(name);
1950 kfree(otype);
1951
1952 return rc;
1953 }
1954
1955 static int genfs_read(struct policydb *p, void *fp)
1956 {
1957 int i, j, rc;
1958 u32 nel, nel2, len, len2;
1959 __le32 buf[1];
1960 struct ocontext *l, *c;
1961 struct ocontext *newc = NULL;
1962 struct genfs *genfs_p, *genfs;
1963 struct genfs *newgenfs = NULL;
1964
1965 rc = next_entry(buf, fp, sizeof(u32));
1966 if (rc)
1967 return rc;
1968 nel = le32_to_cpu(buf[0]);
1969
1970 for (i = 0; i < nel; i++) {
1971 rc = next_entry(buf, fp, sizeof(u32));
1972 if (rc)
1973 goto out;
1974 len = le32_to_cpu(buf[0]);
1975
1976 rc = -ENOMEM;
1977 newgenfs = kzalloc(sizeof(*newgenfs), GFP_KERNEL);
1978 if (!newgenfs)
1979 goto out;
1980
1981 rc = str_read(&newgenfs->fstype, GFP_KERNEL, fp, len);
1982 if (rc)
1983 goto out;
1984
1985 for (genfs_p = NULL, genfs = p->genfs; genfs;
1986 genfs_p = genfs, genfs = genfs->next) {
1987 rc = -EINVAL;
1988 if (strcmp(newgenfs->fstype, genfs->fstype) == 0) {
1989 pr_err("SELinux: dup genfs fstype %s\n",
1990 newgenfs->fstype);
1991 goto out;
1992 }
1993 if (strcmp(newgenfs->fstype, genfs->fstype) < 0)
1994 break;
1995 }
1996 newgenfs->next = genfs;
1997 if (genfs_p)
1998 genfs_p->next = newgenfs;
1999 else
2000 p->genfs = newgenfs;
2001 genfs = newgenfs;
2002 newgenfs = NULL;
2003
2004 rc = next_entry(buf, fp, sizeof(u32));
2005 if (rc)
2006 goto out;
2007
2008 nel2 = le32_to_cpu(buf[0]);
2009 for (j = 0; j < nel2; j++) {
2010 rc = next_entry(buf, fp, sizeof(u32));
2011 if (rc)
2012 goto out;
2013 len = le32_to_cpu(buf[0]);
2014
2015 rc = -ENOMEM;
2016 newc = kzalloc(sizeof(*newc), GFP_KERNEL);
2017 if (!newc)
2018 goto out;
2019
2020 rc = str_read(&newc->u.name, GFP_KERNEL, fp, len);
2021 if (rc)
2022 goto out;
2023
2024 rc = next_entry(buf, fp, sizeof(u32));
2025 if (rc)
2026 goto out;
2027
2028 newc->v.sclass = le32_to_cpu(buf[0]);
2029 rc = context_read_and_validate(&newc->context[0], p, fp);
2030 if (rc)
2031 goto out;
2032
2033 for (l = NULL, c = genfs->head; c;
2034 l = c, c = c->next) {
2035 rc = -EINVAL;
2036 if (!strcmp(newc->u.name, c->u.name) &&
2037 (!c->v.sclass || !newc->v.sclass ||
2038 newc->v.sclass == c->v.sclass)) {
2039 pr_err("SELinux: dup genfs entry (%s,%s)\n",
2040 genfs->fstype, c->u.name);
2041 goto out;
2042 }
2043 len = strlen(newc->u.name);
2044 len2 = strlen(c->u.name);
2045 if (len > len2)
2046 break;
2047 }
2048
2049 newc->next = c;
2050 if (l)
2051 l->next = newc;
2052 else
2053 genfs->head = newc;
2054 newc = NULL;
2055 }
2056 }
2057 rc = 0;
2058 out:
2059 if (newgenfs) {
2060 kfree(newgenfs->fstype);
2061 kfree(newgenfs);
2062 }
2063 ocontext_destroy(newc, OCON_FSUSE);
2064
2065 return rc;
2066 }
2067
2068 static int ocontext_read(struct policydb *p, struct policydb_compat_info *info,
2069 void *fp)
2070 {
2071 int i, j, rc;
2072 u32 nel, len;
2073 __be64 prefixbuf[1];
2074 __le32 buf[3];
2075 struct ocontext *l, *c;
2076 u32 nodebuf[8];
2077
2078 for (i = 0; i < info->ocon_num; i++) {
2079 rc = next_entry(buf, fp, sizeof(u32));
2080 if (rc)
2081 goto out;
2082 nel = le32_to_cpu(buf[0]);
2083
2084 l = NULL;
2085 for (j = 0; j < nel; j++) {
2086 rc = -ENOMEM;
2087 c = kzalloc(sizeof(*c), GFP_KERNEL);
2088 if (!c)
2089 goto out;
2090 if (l)
2091 l->next = c;
2092 else
2093 p->ocontexts[i] = c;
2094 l = c;
2095
2096 switch (i) {
2097 case OCON_ISID:
2098 rc = next_entry(buf, fp, sizeof(u32));
2099 if (rc)
2100 goto out;
2101
2102 c->sid[0] = le32_to_cpu(buf[0]);
2103 rc = context_read_and_validate(&c->context[0], p, fp);
2104 if (rc)
2105 goto out;
2106 break;
2107 case OCON_FS:
2108 case OCON_NETIF:
2109 rc = next_entry(buf, fp, sizeof(u32));
2110 if (rc)
2111 goto out;
2112 len = le32_to_cpu(buf[0]);
2113
2114 rc = str_read(&c->u.name, GFP_KERNEL, fp, len);
2115 if (rc)
2116 goto out;
2117
2118 rc = context_read_and_validate(&c->context[0], p, fp);
2119 if (rc)
2120 goto out;
2121 rc = context_read_and_validate(&c->context[1], p, fp);
2122 if (rc)
2123 goto out;
2124 break;
2125 case OCON_PORT:
2126 rc = next_entry(buf, fp, sizeof(u32)*3);
2127 if (rc)
2128 goto out;
2129 c->u.port.protocol = le32_to_cpu(buf[0]);
2130 c->u.port.low_port = le32_to_cpu(buf[1]);
2131 c->u.port.high_port = le32_to_cpu(buf[2]);
2132 rc = context_read_and_validate(&c->context[0], p, fp);
2133 if (rc)
2134 goto out;
2135 break;
2136 case OCON_NODE:
2137 rc = next_entry(nodebuf, fp, sizeof(u32) * 2);
2138 if (rc)
2139 goto out;
2140 c->u.node.addr = nodebuf[0];
2141 c->u.node.mask = nodebuf[1];
2142 rc = context_read_and_validate(&c->context[0], p, fp);
2143 if (rc)
2144 goto out;
2145 break;
2146 case OCON_FSUSE:
2147 rc = next_entry(buf, fp, sizeof(u32)*2);
2148 if (rc)
2149 goto out;
2150
2151 rc = -EINVAL;
2152 c->v.behavior = le32_to_cpu(buf[0]);
2153
2154 if (c->v.behavior == SECURITY_FS_USE_MNTPOINT)
2155 goto out;
2156 if (c->v.behavior > SECURITY_FS_USE_MAX)
2157 goto out;
2158
2159 len = le32_to_cpu(buf[1]);
2160 rc = str_read(&c->u.name, GFP_KERNEL, fp, len);
2161 if (rc)
2162 goto out;
2163
2164 rc = context_read_and_validate(&c->context[0], p, fp);
2165 if (rc)
2166 goto out;
2167 break;
2168 case OCON_NODE6: {
2169 int k;
2170
2171 rc = next_entry(nodebuf, fp, sizeof(u32) * 8);
2172 if (rc)
2173 goto out;
2174 for (k = 0; k < 4; k++)
2175 c->u.node6.addr[k] = nodebuf[k];
2176 for (k = 0; k < 4; k++)
2177 c->u.node6.mask[k] = nodebuf[k+4];
2178 rc = context_read_and_validate(&c->context[0], p, fp);
2179 if (rc)
2180 goto out;
2181 break;
2182 }
2183 case OCON_IBPKEY: {
2184 u32 pkey_lo, pkey_hi;
2185
2186 rc = next_entry(prefixbuf, fp, sizeof(u64));
2187 if (rc)
2188 goto out;
2189
2190
2191 c->u.ibpkey.subnet_prefix = be64_to_cpu(prefixbuf[0]);
2192
2193 rc = next_entry(buf, fp, sizeof(u32) * 2);
2194 if (rc)
2195 goto out;
2196
2197 pkey_lo = le32_to_cpu(buf[0]);
2198 pkey_hi = le32_to_cpu(buf[1]);
2199
2200 if (pkey_lo > U16_MAX || pkey_hi > U16_MAX) {
2201 rc = -EINVAL;
2202 goto out;
2203 }
2204
2205 c->u.ibpkey.low_pkey = pkey_lo;
2206 c->u.ibpkey.high_pkey = pkey_hi;
2207
2208 rc = context_read_and_validate(&c->context[0],
2209 p,
2210 fp);
2211 if (rc)
2212 goto out;
2213 break;
2214 }
2215 case OCON_IBENDPORT: {
2216 u32 port;
2217
2218 rc = next_entry(buf, fp, sizeof(u32) * 2);
2219 if (rc)
2220 goto out;
2221 len = le32_to_cpu(buf[0]);
2222
2223 rc = str_read(&c->u.ibendport.dev_name, GFP_KERNEL, fp, len);
2224 if (rc)
2225 goto out;
2226
2227 port = le32_to_cpu(buf[1]);
2228 if (port > U8_MAX || port == 0) {
2229 rc = -EINVAL;
2230 goto out;
2231 }
2232
2233 c->u.ibendport.port = port;
2234
2235 rc = context_read_and_validate(&c->context[0],
2236 p,
2237 fp);
2238 if (rc)
2239 goto out;
2240 break;
2241 }
2242 }
2243 }
2244 }
2245 rc = 0;
2246 out:
2247 return rc;
2248 }
2249
2250
2251
2252
2253
2254 int policydb_read(struct policydb *p, void *fp)
2255 {
2256 struct role_allow *ra, *lra;
2257 struct role_trans *tr, *ltr;
2258 int i, j, rc;
2259 __le32 buf[4];
2260 u32 len, nprim, nel;
2261
2262 char *policydb_str;
2263 struct policydb_compat_info *info;
2264
2265 rc = policydb_init(p);
2266 if (rc)
2267 return rc;
2268
2269
2270 rc = next_entry(buf, fp, sizeof(u32) * 2);
2271 if (rc)
2272 goto bad;
2273
2274 rc = -EINVAL;
2275 if (le32_to_cpu(buf[0]) != POLICYDB_MAGIC) {
2276 pr_err("SELinux: policydb magic number 0x%x does "
2277 "not match expected magic number 0x%x\n",
2278 le32_to_cpu(buf[0]), POLICYDB_MAGIC);
2279 goto bad;
2280 }
2281
2282 rc = -EINVAL;
2283 len = le32_to_cpu(buf[1]);
2284 if (len != strlen(POLICYDB_STRING)) {
2285 pr_err("SELinux: policydb string length %d does not "
2286 "match expected length %zu\n",
2287 len, strlen(POLICYDB_STRING));
2288 goto bad;
2289 }
2290
2291 rc = -ENOMEM;
2292 policydb_str = kmalloc(len + 1, GFP_KERNEL);
2293 if (!policydb_str) {
2294 pr_err("SELinux: unable to allocate memory for policydb "
2295 "string of length %d\n", len);
2296 goto bad;
2297 }
2298
2299 rc = next_entry(policydb_str, fp, len);
2300 if (rc) {
2301 pr_err("SELinux: truncated policydb string identifier\n");
2302 kfree(policydb_str);
2303 goto bad;
2304 }
2305
2306 rc = -EINVAL;
2307 policydb_str[len] = '\0';
2308 if (strcmp(policydb_str, POLICYDB_STRING)) {
2309 pr_err("SELinux: policydb string %s does not match "
2310 "my string %s\n", policydb_str, POLICYDB_STRING);
2311 kfree(policydb_str);
2312 goto bad;
2313 }
2314
2315 kfree(policydb_str);
2316 policydb_str = NULL;
2317
2318
2319 rc = next_entry(buf, fp, sizeof(u32)*4);
2320 if (rc)
2321 goto bad;
2322
2323 rc = -EINVAL;
2324 p->policyvers = le32_to_cpu(buf[0]);
2325 if (p->policyvers < POLICYDB_VERSION_MIN ||
2326 p->policyvers > POLICYDB_VERSION_MAX) {
2327 pr_err("SELinux: policydb version %d does not match "
2328 "my version range %d-%d\n",
2329 le32_to_cpu(buf[0]), POLICYDB_VERSION_MIN, POLICYDB_VERSION_MAX);
2330 goto bad;
2331 }
2332
2333 if ((le32_to_cpu(buf[1]) & POLICYDB_CONFIG_MLS)) {
2334 p->mls_enabled = 1;
2335
2336 rc = -EINVAL;
2337 if (p->policyvers < POLICYDB_VERSION_MLS) {
2338 pr_err("SELinux: security policydb version %d "
2339 "(MLS) not backwards compatible\n",
2340 p->policyvers);
2341 goto bad;
2342 }
2343 }
2344 p->reject_unknown = !!(le32_to_cpu(buf[1]) & REJECT_UNKNOWN);
2345 p->allow_unknown = !!(le32_to_cpu(buf[1]) & ALLOW_UNKNOWN);
2346
2347 if (p->policyvers >= POLICYDB_VERSION_POLCAP) {
2348 rc = ebitmap_read(&p->policycaps, fp);
2349 if (rc)
2350 goto bad;
2351 }
2352
2353 if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE) {
2354 rc = ebitmap_read(&p->permissive_map, fp);
2355 if (rc)
2356 goto bad;
2357 }
2358
2359 rc = -EINVAL;
2360 info = policydb_lookup_compat(p->policyvers);
2361 if (!info) {
2362 pr_err("SELinux: unable to find policy compat info "
2363 "for version %d\n", p->policyvers);
2364 goto bad;
2365 }
2366
2367 rc = -EINVAL;
2368 if (le32_to_cpu(buf[2]) != info->sym_num ||
2369 le32_to_cpu(buf[3]) != info->ocon_num) {
2370 pr_err("SELinux: policydb table sizes (%d,%d) do "
2371 "not match mine (%d,%d)\n", le32_to_cpu(buf[2]),
2372 le32_to_cpu(buf[3]),
2373 info->sym_num, info->ocon_num);
2374 goto bad;
2375 }
2376
2377 for (i = 0; i < info->sym_num; i++) {
2378 rc = next_entry(buf, fp, sizeof(u32)*2);
2379 if (rc)
2380 goto bad;
2381 nprim = le32_to_cpu(buf[0]);
2382 nel = le32_to_cpu(buf[1]);
2383 for (j = 0; j < nel; j++) {
2384 rc = read_f[i](p, p->symtab[i].table, fp);
2385 if (rc)
2386 goto bad;
2387 }
2388
2389 p->symtab[i].nprim = nprim;
2390 }
2391
2392 rc = -EINVAL;
2393 p->process_class = string_to_security_class(p, "process");
2394 if (!p->process_class)
2395 goto bad;
2396
2397 rc = avtab_read(&p->te_avtab, fp, p);
2398 if (rc)
2399 goto bad;
2400
2401 if (p->policyvers >= POLICYDB_VERSION_BOOL) {
2402 rc = cond_read_list(p, fp);
2403 if (rc)
2404 goto bad;
2405 }
2406
2407 rc = next_entry(buf, fp, sizeof(u32));
2408 if (rc)
2409 goto bad;
2410 nel = le32_to_cpu(buf[0]);
2411 ltr = NULL;
2412 for (i = 0; i < nel; i++) {
2413 rc = -ENOMEM;
2414 tr = kzalloc(sizeof(*tr), GFP_KERNEL);
2415 if (!tr)
2416 goto bad;
2417 if (ltr)
2418 ltr->next = tr;
2419 else
2420 p->role_tr = tr;
2421 rc = next_entry(buf, fp, sizeof(u32)*3);
2422 if (rc)
2423 goto bad;
2424
2425 rc = -EINVAL;
2426 tr->role = le32_to_cpu(buf[0]);
2427 tr->type = le32_to_cpu(buf[1]);
2428 tr->new_role = le32_to_cpu(buf[2]);
2429 if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) {
2430 rc = next_entry(buf, fp, sizeof(u32));
2431 if (rc)
2432 goto bad;
2433 tr->tclass = le32_to_cpu(buf[0]);
2434 } else
2435 tr->tclass = p->process_class;
2436
2437 rc = -EINVAL;
2438 if (!policydb_role_isvalid(p, tr->role) ||
2439 !policydb_type_isvalid(p, tr->type) ||
2440 !policydb_class_isvalid(p, tr->tclass) ||
2441 !policydb_role_isvalid(p, tr->new_role))
2442 goto bad;
2443 ltr = tr;
2444 }
2445
2446 rc = next_entry(buf, fp, sizeof(u32));
2447 if (rc)
2448 goto bad;
2449 nel = le32_to_cpu(buf[0]);
2450 lra = NULL;
2451 for (i = 0; i < nel; i++) {
2452 rc = -ENOMEM;
2453 ra = kzalloc(sizeof(*ra), GFP_KERNEL);
2454 if (!ra)
2455 goto bad;
2456 if (lra)
2457 lra->next = ra;
2458 else
2459 p->role_allow = ra;
2460 rc = next_entry(buf, fp, sizeof(u32)*2);
2461 if (rc)
2462 goto bad;
2463
2464 rc = -EINVAL;
2465 ra->role = le32_to_cpu(buf[0]);
2466 ra->new_role = le32_to_cpu(buf[1]);
2467 if (!policydb_role_isvalid(p, ra->role) ||
2468 !policydb_role_isvalid(p, ra->new_role))
2469 goto bad;
2470 lra = ra;
2471 }
2472
2473 rc = filename_trans_read(p, fp);
2474 if (rc)
2475 goto bad;
2476
2477 rc = policydb_index(p);
2478 if (rc)
2479 goto bad;
2480
2481 rc = -EINVAL;
2482 p->process_trans_perms = string_to_av_perm(p, p->process_class, "transition");
2483 p->process_trans_perms |= string_to_av_perm(p, p->process_class, "dyntransition");
2484 if (!p->process_trans_perms)
2485 goto bad;
2486
2487 rc = ocontext_read(p, info, fp);
2488 if (rc)
2489 goto bad;
2490
2491 rc = genfs_read(p, fp);
2492 if (rc)
2493 goto bad;
2494
2495 rc = range_read(p, fp);
2496 if (rc)
2497 goto bad;
2498
2499 p->type_attr_map_array = kvcalloc(p->p_types.nprim,
2500 sizeof(*p->type_attr_map_array),
2501 GFP_KERNEL);
2502 if (!p->type_attr_map_array)
2503 goto bad;
2504
2505
2506 for (i = 0; i < p->p_types.nprim; i++)
2507 ebitmap_init(&p->type_attr_map_array[i]);
2508
2509 for (i = 0; i < p->p_types.nprim; i++) {
2510 struct ebitmap *e = &p->type_attr_map_array[i];
2511
2512 if (p->policyvers >= POLICYDB_VERSION_AVTAB) {
2513 rc = ebitmap_read(e, fp);
2514 if (rc)
2515 goto bad;
2516 }
2517
2518 rc = ebitmap_set_bit(e, i, 1);
2519 if (rc)
2520 goto bad;
2521 }
2522
2523 rc = policydb_bounds_sanity_check(p);
2524 if (rc)
2525 goto bad;
2526
2527 rc = 0;
2528 out:
2529 return rc;
2530 bad:
2531 policydb_destroy(p);
2532 goto out;
2533 }
2534
2535
2536
2537
2538
2539 static int mls_write_level(struct mls_level *l, void *fp)
2540 {
2541 __le32 buf[1];
2542 int rc;
2543
2544 buf[0] = cpu_to_le32(l->sens);
2545 rc = put_entry(buf, sizeof(u32), 1, fp);
2546 if (rc)
2547 return rc;
2548
2549 rc = ebitmap_write(&l->cat, fp);
2550 if (rc)
2551 return rc;
2552
2553 return 0;
2554 }
2555
2556
2557
2558
2559
2560 static int mls_write_range_helper(struct mls_range *r, void *fp)
2561 {
2562 __le32 buf[3];
2563 size_t items;
2564 int rc, eq;
2565
2566 eq = mls_level_eq(&r->level[1], &r->level[0]);
2567
2568 if (eq)
2569 items = 2;
2570 else
2571 items = 3;
2572 buf[0] = cpu_to_le32(items-1);
2573 buf[1] = cpu_to_le32(r->level[0].sens);
2574 if (!eq)
2575 buf[2] = cpu_to_le32(r->level[1].sens);
2576
2577 BUG_ON(items > ARRAY_SIZE(buf));
2578
2579 rc = put_entry(buf, sizeof(u32), items, fp);
2580 if (rc)
2581 return rc;
2582
2583 rc = ebitmap_write(&r->level[0].cat, fp);
2584 if (rc)
2585 return rc;
2586 if (!eq) {
2587 rc = ebitmap_write(&r->level[1].cat, fp);
2588 if (rc)
2589 return rc;
2590 }
2591
2592 return 0;
2593 }
2594
2595 static int sens_write(void *vkey, void *datum, void *ptr)
2596 {
2597 char *key = vkey;
2598 struct level_datum *levdatum = datum;
2599 struct policy_data *pd = ptr;
2600 void *fp = pd->fp;
2601 __le32 buf[2];
2602 size_t len;
2603 int rc;
2604
2605 len = strlen(key);
2606 buf[0] = cpu_to_le32(len);
2607 buf[1] = cpu_to_le32(levdatum->isalias);
2608 rc = put_entry(buf, sizeof(u32), 2, fp);
2609 if (rc)
2610 return rc;
2611
2612 rc = put_entry(key, 1, len, fp);
2613 if (rc)
2614 return rc;
2615
2616 rc = mls_write_level(levdatum->level, fp);
2617 if (rc)
2618 return rc;
2619
2620 return 0;
2621 }
2622
2623 static int cat_write(void *vkey, void *datum, void *ptr)
2624 {
2625 char *key = vkey;
2626 struct cat_datum *catdatum = datum;
2627 struct policy_data *pd = ptr;
2628 void *fp = pd->fp;
2629 __le32 buf[3];
2630 size_t len;
2631 int rc;
2632
2633 len = strlen(key);
2634 buf[0] = cpu_to_le32(len);
2635 buf[1] = cpu_to_le32(catdatum->value);
2636 buf[2] = cpu_to_le32(catdatum->isalias);
2637 rc = put_entry(buf, sizeof(u32), 3, fp);
2638 if (rc)
2639 return rc;
2640
2641 rc = put_entry(key, 1, len, fp);
2642 if (rc)
2643 return rc;
2644
2645 return 0;
2646 }
2647
2648 static int role_trans_write(struct policydb *p, void *fp)
2649 {
2650 struct role_trans *r = p->role_tr;
2651 struct role_trans *tr;
2652 u32 buf[3];
2653 size_t nel;
2654 int rc;
2655
2656 nel = 0;
2657 for (tr = r; tr; tr = tr->next)
2658 nel++;
2659 buf[0] = cpu_to_le32(nel);
2660 rc = put_entry(buf, sizeof(u32), 1, fp);
2661 if (rc)
2662 return rc;
2663 for (tr = r; tr; tr = tr->next) {
2664 buf[0] = cpu_to_le32(tr->role);
2665 buf[1] = cpu_to_le32(tr->type);
2666 buf[2] = cpu_to_le32(tr->new_role);
2667 rc = put_entry(buf, sizeof(u32), 3, fp);
2668 if (rc)
2669 return rc;
2670 if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) {
2671 buf[0] = cpu_to_le32(tr->tclass);
2672 rc = put_entry(buf, sizeof(u32), 1, fp);
2673 if (rc)
2674 return rc;
2675 }
2676 }
2677
2678 return 0;
2679 }
2680
2681 static int role_allow_write(struct role_allow *r, void *fp)
2682 {
2683 struct role_allow *ra;
2684 u32 buf[2];
2685 size_t nel;
2686 int rc;
2687
2688 nel = 0;
2689 for (ra = r; ra; ra = ra->next)
2690 nel++;
2691 buf[0] = cpu_to_le32(nel);
2692 rc = put_entry(buf, sizeof(u32), 1, fp);
2693 if (rc)
2694 return rc;
2695 for (ra = r; ra; ra = ra->next) {
2696 buf[0] = cpu_to_le32(ra->role);
2697 buf[1] = cpu_to_le32(ra->new_role);
2698 rc = put_entry(buf, sizeof(u32), 2, fp);
2699 if (rc)
2700 return rc;
2701 }
2702 return 0;
2703 }
2704
2705
2706
2707
2708
2709 static int context_write(struct policydb *p, struct context *c,
2710 void *fp)
2711 {
2712 int rc;
2713 __le32 buf[3];
2714
2715 buf[0] = cpu_to_le32(c->user);
2716 buf[1] = cpu_to_le32(c->role);
2717 buf[2] = cpu_to_le32(c->type);
2718
2719 rc = put_entry(buf, sizeof(u32), 3, fp);
2720 if (rc)
2721 return rc;
2722
2723 rc = mls_write_range_helper(&c->range, fp);
2724 if (rc)
2725 return rc;
2726
2727 return 0;
2728 }
2729
2730
2731
2732
2733
2734
2735
2736 static int perm_write(void *vkey, void *datum, void *fp)
2737 {
2738 char *key = vkey;
2739 struct perm_datum *perdatum = datum;
2740 __le32 buf[2];
2741 size_t len;
2742 int rc;
2743
2744 len = strlen(key);
2745 buf[0] = cpu_to_le32(len);
2746 buf[1] = cpu_to_le32(perdatum->value);
2747 rc = put_entry(buf, sizeof(u32), 2, fp);
2748 if (rc)
2749 return rc;
2750
2751 rc = put_entry(key, 1, len, fp);
2752 if (rc)
2753 return rc;
2754
2755 return 0;
2756 }
2757
2758 static int common_write(void *vkey, void *datum, void *ptr)
2759 {
2760 char *key = vkey;
2761 struct common_datum *comdatum = datum;
2762 struct policy_data *pd = ptr;
2763 void *fp = pd->fp;
2764 __le32 buf[4];
2765 size_t len;
2766 int rc;
2767
2768 len = strlen(key);
2769 buf[0] = cpu_to_le32(len);
2770 buf[1] = cpu_to_le32(comdatum->value);
2771 buf[2] = cpu_to_le32(comdatum->permissions.nprim);
2772 buf[3] = cpu_to_le32(comdatum->permissions.table->nel);
2773 rc = put_entry(buf, sizeof(u32), 4, fp);
2774 if (rc)
2775 return rc;
2776
2777 rc = put_entry(key, 1, len, fp);
2778 if (rc)
2779 return rc;
2780
2781 rc = hashtab_map(comdatum->permissions.table, perm_write, fp);
2782 if (rc)
2783 return rc;
2784
2785 return 0;
2786 }
2787
2788 static int type_set_write(struct type_set *t, void *fp)
2789 {
2790 int rc;
2791 __le32 buf[1];
2792
2793 if (ebitmap_write(&t->types, fp))
2794 return -EINVAL;
2795 if (ebitmap_write(&t->negset, fp))
2796 return -EINVAL;
2797
2798 buf[0] = cpu_to_le32(t->flags);
2799 rc = put_entry(buf, sizeof(u32), 1, fp);
2800 if (rc)
2801 return -EINVAL;
2802
2803 return 0;
2804 }
2805
2806 static int write_cons_helper(struct policydb *p, struct constraint_node *node,
2807 void *fp)
2808 {
2809 struct constraint_node *c;
2810 struct constraint_expr *e;
2811 __le32 buf[3];
2812 u32 nel;
2813 int rc;
2814
2815 for (c = node; c; c = c->next) {
2816 nel = 0;
2817 for (e = c->expr; e; e = e->next)
2818 nel++;
2819 buf[0] = cpu_to_le32(c->permissions);
2820 buf[1] = cpu_to_le32(nel);
2821 rc = put_entry(buf, sizeof(u32), 2, fp);
2822 if (rc)
2823 return rc;
2824 for (e = c->expr; e; e = e->next) {
2825 buf[0] = cpu_to_le32(e->expr_type);
2826 buf[1] = cpu_to_le32(e->attr);
2827 buf[2] = cpu_to_le32(e->op);
2828 rc = put_entry(buf, sizeof(u32), 3, fp);
2829 if (rc)
2830 return rc;
2831
2832 switch (e->expr_type) {
2833 case CEXPR_NAMES:
2834 rc = ebitmap_write(&e->names, fp);
2835 if (rc)
2836 return rc;
2837 if (p->policyvers >=
2838 POLICYDB_VERSION_CONSTRAINT_NAMES) {
2839 rc = type_set_write(e->type_names, fp);
2840 if (rc)
2841 return rc;
2842 }
2843 break;
2844 default:
2845 break;
2846 }
2847 }
2848 }
2849
2850 return 0;
2851 }
2852
2853 static int class_write(void *vkey, void *datum, void *ptr)
2854 {
2855 char *key = vkey;
2856 struct class_datum *cladatum = datum;
2857 struct policy_data *pd = ptr;
2858 void *fp = pd->fp;
2859 struct policydb *p = pd->p;
2860 struct constraint_node *c;
2861 __le32 buf[6];
2862 u32 ncons;
2863 size_t len, len2;
2864 int rc;
2865
2866 len = strlen(key);
2867 if (cladatum->comkey)
2868 len2 = strlen(cladatum->comkey);
2869 else
2870 len2 = 0;
2871
2872 ncons = 0;
2873 for (c = cladatum->constraints; c; c = c->next)
2874 ncons++;
2875
2876 buf[0] = cpu_to_le32(len);
2877 buf[1] = cpu_to_le32(len2);
2878 buf[2] = cpu_to_le32(cladatum->value);
2879 buf[3] = cpu_to_le32(cladatum->permissions.nprim);
2880 if (cladatum->permissions.table)
2881 buf[4] = cpu_to_le32(cladatum->permissions.table->nel);
2882 else
2883 buf[4] = 0;
2884 buf[5] = cpu_to_le32(ncons);
2885 rc = put_entry(buf, sizeof(u32), 6, fp);
2886 if (rc)
2887 return rc;
2888
2889 rc = put_entry(key, 1, len, fp);
2890 if (rc)
2891 return rc;
2892
2893 if (cladatum->comkey) {
2894 rc = put_entry(cladatum->comkey, 1, len2, fp);
2895 if (rc)
2896 return rc;
2897 }
2898
2899 rc = hashtab_map(cladatum->permissions.table, perm_write, fp);
2900 if (rc)
2901 return rc;
2902
2903 rc = write_cons_helper(p, cladatum->constraints, fp);
2904 if (rc)
2905 return rc;
2906
2907
2908 ncons = 0;
2909 for (c = cladatum->validatetrans; c; c = c->next)
2910 ncons++;
2911
2912 buf[0] = cpu_to_le32(ncons);
2913 rc = put_entry(buf, sizeof(u32), 1, fp);
2914 if (rc)
2915 return rc;
2916
2917 rc = write_cons_helper(p, cladatum->validatetrans, fp);
2918 if (rc)
2919 return rc;
2920
2921 if (p->policyvers >= POLICYDB_VERSION_NEW_OBJECT_DEFAULTS) {
2922 buf[0] = cpu_to_le32(cladatum->default_user);
2923 buf[1] = cpu_to_le32(cladatum->default_role);
2924 buf[2] = cpu_to_le32(cladatum->default_range);
2925
2926 rc = put_entry(buf, sizeof(uint32_t), 3, fp);
2927 if (rc)
2928 return rc;
2929 }
2930
2931 if (p->policyvers >= POLICYDB_VERSION_DEFAULT_TYPE) {
2932 buf[0] = cpu_to_le32(cladatum->default_type);
2933 rc = put_entry(buf, sizeof(uint32_t), 1, fp);
2934 if (rc)
2935 return rc;
2936 }
2937
2938 return 0;
2939 }
2940
2941 static int role_write(void *vkey, void *datum, void *ptr)
2942 {
2943 char *key = vkey;
2944 struct role_datum *role = datum;
2945 struct policy_data *pd = ptr;
2946 void *fp = pd->fp;
2947 struct policydb *p = pd->p;
2948 __le32 buf[3];
2949 size_t items, len;
2950 int rc;
2951
2952 len = strlen(key);
2953 items = 0;
2954 buf[items++] = cpu_to_le32(len);
2955 buf[items++] = cpu_to_le32(role->value);
2956 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
2957 buf[items++] = cpu_to_le32(role->bounds);
2958
2959 BUG_ON(items > ARRAY_SIZE(buf));
2960
2961 rc = put_entry(buf, sizeof(u32), items, fp);
2962 if (rc)
2963 return rc;
2964
2965 rc = put_entry(key, 1, len, fp);
2966 if (rc)
2967 return rc;
2968
2969 rc = ebitmap_write(&role->dominates, fp);
2970 if (rc)
2971 return rc;
2972
2973 rc = ebitmap_write(&role->types, fp);
2974 if (rc)
2975 return rc;
2976
2977 return 0;
2978 }
2979
2980 static int type_write(void *vkey, void *datum, void *ptr)
2981 {
2982 char *key = vkey;
2983 struct type_datum *typdatum = datum;
2984 struct policy_data *pd = ptr;
2985 struct policydb *p = pd->p;
2986 void *fp = pd->fp;
2987 __le32 buf[4];
2988 int rc;
2989 size_t items, len;
2990
2991 len = strlen(key);
2992 items = 0;
2993 buf[items++] = cpu_to_le32(len);
2994 buf[items++] = cpu_to_le32(typdatum->value);
2995 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) {
2996 u32 properties = 0;
2997
2998 if (typdatum->primary)
2999 properties |= TYPEDATUM_PROPERTY_PRIMARY;
3000
3001 if (typdatum->attribute)
3002 properties |= TYPEDATUM_PROPERTY_ATTRIBUTE;
3003
3004 buf[items++] = cpu_to_le32(properties);
3005 buf[items++] = cpu_to_le32(typdatum->bounds);
3006 } else {
3007 buf[items++] = cpu_to_le32(typdatum->primary);
3008 }
3009 BUG_ON(items > ARRAY_SIZE(buf));
3010 rc = put_entry(buf, sizeof(u32), items, fp);
3011 if (rc)
3012 return rc;
3013
3014 rc = put_entry(key, 1, len, fp);
3015 if (rc)
3016 return rc;
3017
3018 return 0;
3019 }
3020
3021 static int user_write(void *vkey, void *datum, void *ptr)
3022 {
3023 char *key = vkey;
3024 struct user_datum *usrdatum = datum;
3025 struct policy_data *pd = ptr;
3026 struct policydb *p = pd->p;
3027 void *fp = pd->fp;
3028 __le32 buf[3];
3029 size_t items, len;
3030 int rc;
3031
3032 len = strlen(key);
3033 items = 0;
3034 buf[items++] = cpu_to_le32(len);
3035 buf[items++] = cpu_to_le32(usrdatum->value);
3036 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
3037 buf[items++] = cpu_to_le32(usrdatum->bounds);
3038 BUG_ON(items > ARRAY_SIZE(buf));
3039 rc = put_entry(buf, sizeof(u32), items, fp);
3040 if (rc)
3041 return rc;
3042
3043 rc = put_entry(key, 1, len, fp);
3044 if (rc)
3045 return rc;
3046
3047 rc = ebitmap_write(&usrdatum->roles, fp);
3048 if (rc)
3049 return rc;
3050
3051 rc = mls_write_range_helper(&usrdatum->range, fp);
3052 if (rc)
3053 return rc;
3054
3055 rc = mls_write_level(&usrdatum->dfltlevel, fp);
3056 if (rc)
3057 return rc;
3058
3059 return 0;
3060 }
3061
3062 static int (*write_f[SYM_NUM]) (void *key, void *datum,
3063 void *datap) =
3064 {
3065 common_write,
3066 class_write,
3067 role_write,
3068 type_write,
3069 user_write,
3070 cond_write_bool,
3071 sens_write,
3072 cat_write,
3073 };
3074
3075 static int ocontext_write(struct policydb *p, struct policydb_compat_info *info,
3076 void *fp)
3077 {
3078 unsigned int i, j, rc;
3079 size_t nel, len;
3080 __be64 prefixbuf[1];
3081 __le32 buf[3];
3082 u32 nodebuf[8];
3083 struct ocontext *c;
3084 for (i = 0; i < info->ocon_num; i++) {
3085 nel = 0;
3086 for (c = p->ocontexts[i]; c; c = c->next)
3087 nel++;
3088 buf[0] = cpu_to_le32(nel);
3089 rc = put_entry(buf, sizeof(u32), 1, fp);
3090 if (rc)
3091 return rc;
3092 for (c = p->ocontexts[i]; c; c = c->next) {
3093 switch (i) {
3094 case OCON_ISID:
3095 buf[0] = cpu_to_le32(c->sid[0]);
3096 rc = put_entry(buf, sizeof(u32), 1, fp);
3097 if (rc)
3098 return rc;
3099 rc = context_write(p, &c->context[0], fp);
3100 if (rc)
3101 return rc;
3102 break;
3103 case OCON_FS:
3104 case OCON_NETIF:
3105 len = strlen(c->u.name);
3106 buf[0] = cpu_to_le32(len);
3107 rc = put_entry(buf, sizeof(u32), 1, fp);
3108 if (rc)
3109 return rc;
3110 rc = put_entry(c->u.name, 1, len, fp);
3111 if (rc)
3112 return rc;
3113 rc = context_write(p, &c->context[0], fp);
3114 if (rc)
3115 return rc;
3116 rc = context_write(p, &c->context[1], fp);
3117 if (rc)
3118 return rc;
3119 break;
3120 case OCON_PORT:
3121 buf[0] = cpu_to_le32(c->u.port.protocol);
3122 buf[1] = cpu_to_le32(c->u.port.low_port);
3123 buf[2] = cpu_to_le32(c->u.port.high_port);
3124 rc = put_entry(buf, sizeof(u32), 3, fp);
3125 if (rc)
3126 return rc;
3127 rc = context_write(p, &c->context[0], fp);
3128 if (rc)
3129 return rc;
3130 break;
3131 case OCON_NODE:
3132 nodebuf[0] = c->u.node.addr;
3133 nodebuf[1] = c->u.node.mask;
3134 rc = put_entry(nodebuf, sizeof(u32), 2, fp);
3135 if (rc)
3136 return rc;
3137 rc = context_write(p, &c->context[0], fp);
3138 if (rc)
3139 return rc;
3140 break;
3141 case OCON_FSUSE:
3142 buf[0] = cpu_to_le32(c->v.behavior);
3143 len = strlen(c->u.name);
3144 buf[1] = cpu_to_le32(len);
3145 rc = put_entry(buf, sizeof(u32), 2, fp);
3146 if (rc)
3147 return rc;
3148 rc = put_entry(c->u.name, 1, len, fp);
3149 if (rc)
3150 return rc;
3151 rc = context_write(p, &c->context[0], fp);
3152 if (rc)
3153 return rc;
3154 break;
3155 case OCON_NODE6:
3156 for (j = 0; j < 4; j++)
3157 nodebuf[j] = c->u.node6.addr[j];
3158 for (j = 0; j < 4; j++)
3159 nodebuf[j + 4] = c->u.node6.mask[j];
3160 rc = put_entry(nodebuf, sizeof(u32), 8, fp);
3161 if (rc)
3162 return rc;
3163 rc = context_write(p, &c->context[0], fp);
3164 if (rc)
3165 return rc;
3166 break;
3167 case OCON_IBPKEY:
3168
3169 prefixbuf[0] = cpu_to_be64(c->u.ibpkey.subnet_prefix);
3170
3171 rc = put_entry(prefixbuf, sizeof(u64), 1, fp);
3172 if (rc)
3173 return rc;
3174
3175 buf[0] = cpu_to_le32(c->u.ibpkey.low_pkey);
3176 buf[1] = cpu_to_le32(c->u.ibpkey.high_pkey);
3177
3178 rc = put_entry(buf, sizeof(u32), 2, fp);
3179 if (rc)
3180 return rc;
3181 rc = context_write(p, &c->context[0], fp);
3182 if (rc)
3183 return rc;
3184 break;
3185 case OCON_IBENDPORT:
3186 len = strlen(c->u.ibendport.dev_name);
3187 buf[0] = cpu_to_le32(len);
3188 buf[1] = cpu_to_le32(c->u.ibendport.port);
3189 rc = put_entry(buf, sizeof(u32), 2, fp);
3190 if (rc)
3191 return rc;
3192 rc = put_entry(c->u.ibendport.dev_name, 1, len, fp);
3193 if (rc)
3194 return rc;
3195 rc = context_write(p, &c->context[0], fp);
3196 if (rc)
3197 return rc;
3198 break;
3199 }
3200 }
3201 }
3202 return 0;
3203 }
3204
3205 static int genfs_write(struct policydb *p, void *fp)
3206 {
3207 struct genfs *genfs;
3208 struct ocontext *c;
3209 size_t len;
3210 __le32 buf[1];
3211 int rc;
3212
3213 len = 0;
3214 for (genfs = p->genfs; genfs; genfs = genfs->next)
3215 len++;
3216 buf[0] = cpu_to_le32(len);
3217 rc = put_entry(buf, sizeof(u32), 1, fp);
3218 if (rc)
3219 return rc;
3220 for (genfs = p->genfs; genfs; genfs = genfs->next) {
3221 len = strlen(genfs->fstype);
3222 buf[0] = cpu_to_le32(len);
3223 rc = put_entry(buf, sizeof(u32), 1, fp);
3224 if (rc)
3225 return rc;
3226 rc = put_entry(genfs->fstype, 1, len, fp);
3227 if (rc)
3228 return rc;
3229 len = 0;
3230 for (c = genfs->head; c; c = c->next)
3231 len++;
3232 buf[0] = cpu_to_le32(len);
3233 rc = put_entry(buf, sizeof(u32), 1, fp);
3234 if (rc)
3235 return rc;
3236 for (c = genfs->head; c; c = c->next) {
3237 len = strlen(c->u.name);
3238 buf[0] = cpu_to_le32(len);
3239 rc = put_entry(buf, sizeof(u32), 1, fp);
3240 if (rc)
3241 return rc;
3242 rc = put_entry(c->u.name, 1, len, fp);
3243 if (rc)
3244 return rc;
3245 buf[0] = cpu_to_le32(c->v.sclass);
3246 rc = put_entry(buf, sizeof(u32), 1, fp);
3247 if (rc)
3248 return rc;
3249 rc = context_write(p, &c->context[0], fp);
3250 if (rc)
3251 return rc;
3252 }
3253 }
3254 return 0;
3255 }
3256
3257 static int hashtab_cnt(void *key, void *data, void *ptr)
3258 {
3259 int *cnt = ptr;
3260 *cnt = *cnt + 1;
3261
3262 return 0;
3263 }
3264
3265 static int range_write_helper(void *key, void *data, void *ptr)
3266 {
3267 __le32 buf[2];
3268 struct range_trans *rt = key;
3269 struct mls_range *r = data;
3270 struct policy_data *pd = ptr;
3271 void *fp = pd->fp;
3272 struct policydb *p = pd->p;
3273 int rc;
3274
3275 buf[0] = cpu_to_le32(rt->source_type);
3276 buf[1] = cpu_to_le32(rt->target_type);
3277 rc = put_entry(buf, sizeof(u32), 2, fp);
3278 if (rc)
3279 return rc;
3280 if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) {
3281 buf[0] = cpu_to_le32(rt->target_class);
3282 rc = put_entry(buf, sizeof(u32), 1, fp);
3283 if (rc)
3284 return rc;
3285 }
3286 rc = mls_write_range_helper(r, fp);
3287 if (rc)
3288 return rc;
3289
3290 return 0;
3291 }
3292
3293 static int range_write(struct policydb *p, void *fp)
3294 {
3295 __le32 buf[1];
3296 int rc, nel;
3297 struct policy_data pd;
3298
3299 pd.p = p;
3300 pd.fp = fp;
3301
3302
3303 nel = 0;
3304 rc = hashtab_map(p->range_tr, hashtab_cnt, &nel);
3305 if (rc)
3306 return rc;
3307
3308 buf[0] = cpu_to_le32(nel);
3309 rc = put_entry(buf, sizeof(u32), 1, fp);
3310 if (rc)
3311 return rc;
3312
3313
3314 rc = hashtab_map(p->range_tr, range_write_helper, &pd);
3315 if (rc)
3316 return rc;
3317
3318 return 0;
3319 }
3320
3321 static int filename_write_helper(void *key, void *data, void *ptr)
3322 {
3323 __le32 buf[4];
3324 struct filename_trans *ft = key;
3325 struct filename_trans_datum *otype = data;
3326 void *fp = ptr;
3327 int rc;
3328 u32 len;
3329
3330 len = strlen(ft->name);
3331 buf[0] = cpu_to_le32(len);
3332 rc = put_entry(buf, sizeof(u32), 1, fp);
3333 if (rc)
3334 return rc;
3335
3336 rc = put_entry(ft->name, sizeof(char), len, fp);
3337 if (rc)
3338 return rc;
3339
3340 buf[0] = cpu_to_le32(ft->stype);
3341 buf[1] = cpu_to_le32(ft->ttype);
3342 buf[2] = cpu_to_le32(ft->tclass);
3343 buf[3] = cpu_to_le32(otype->otype);
3344
3345 rc = put_entry(buf, sizeof(u32), 4, fp);
3346 if (rc)
3347 return rc;
3348
3349 return 0;
3350 }
3351
3352 static int filename_trans_write(struct policydb *p, void *fp)
3353 {
3354 u32 nel;
3355 __le32 buf[1];
3356 int rc;
3357
3358 if (p->policyvers < POLICYDB_VERSION_FILENAME_TRANS)
3359 return 0;
3360
3361 nel = 0;
3362 rc = hashtab_map(p->filename_trans, hashtab_cnt, &nel);
3363 if (rc)
3364 return rc;
3365
3366 buf[0] = cpu_to_le32(nel);
3367 rc = put_entry(buf, sizeof(u32), 1, fp);
3368 if (rc)
3369 return rc;
3370
3371 rc = hashtab_map(p->filename_trans, filename_write_helper, fp);
3372 if (rc)
3373 return rc;
3374
3375 return 0;
3376 }
3377
3378
3379
3380
3381
3382
3383 int policydb_write(struct policydb *p, void *fp)
3384 {
3385 unsigned int i, num_syms;
3386 int rc;
3387 __le32 buf[4];
3388 u32 config;
3389 size_t len;
3390 struct policydb_compat_info *info;
3391
3392
3393
3394
3395
3396
3397
3398 if (p->policyvers < POLICYDB_VERSION_AVTAB) {
3399 pr_err("SELinux: refusing to write policy version %d."
3400 " Because it is less than version %d\n", p->policyvers,
3401 POLICYDB_VERSION_AVTAB);
3402 return -EINVAL;
3403 }
3404
3405 config = 0;
3406 if (p->mls_enabled)
3407 config |= POLICYDB_CONFIG_MLS;
3408
3409 if (p->reject_unknown)
3410 config |= REJECT_UNKNOWN;
3411 if (p->allow_unknown)
3412 config |= ALLOW_UNKNOWN;
3413
3414
3415 buf[0] = cpu_to_le32(POLICYDB_MAGIC);
3416 len = strlen(POLICYDB_STRING);
3417 buf[1] = cpu_to_le32(len);
3418 rc = put_entry(buf, sizeof(u32), 2, fp);
3419 if (rc)
3420 return rc;
3421 rc = put_entry(POLICYDB_STRING, 1, len, fp);
3422 if (rc)
3423 return rc;
3424
3425
3426 info = policydb_lookup_compat(p->policyvers);
3427 if (!info) {
3428 pr_err("SELinux: compatibility lookup failed for policy "
3429 "version %d", p->policyvers);
3430 return -EINVAL;
3431 }
3432
3433 buf[0] = cpu_to_le32(p->policyvers);
3434 buf[1] = cpu_to_le32(config);
3435 buf[2] = cpu_to_le32(info->sym_num);
3436 buf[3] = cpu_to_le32(info->ocon_num);
3437
3438 rc = put_entry(buf, sizeof(u32), 4, fp);
3439 if (rc)
3440 return rc;
3441
3442 if (p->policyvers >= POLICYDB_VERSION_POLCAP) {
3443 rc = ebitmap_write(&p->policycaps, fp);
3444 if (rc)
3445 return rc;
3446 }
3447
3448 if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE) {
3449 rc = ebitmap_write(&p->permissive_map, fp);
3450 if (rc)
3451 return rc;
3452 }
3453
3454 num_syms = info->sym_num;
3455 for (i = 0; i < num_syms; i++) {
3456 struct policy_data pd;
3457
3458 pd.fp = fp;
3459 pd.p = p;
3460
3461 buf[0] = cpu_to_le32(p->symtab[i].nprim);
3462 buf[1] = cpu_to_le32(p->symtab[i].table->nel);
3463
3464 rc = put_entry(buf, sizeof(u32), 2, fp);
3465 if (rc)
3466 return rc;
3467 rc = hashtab_map(p->symtab[i].table, write_f[i], &pd);
3468 if (rc)
3469 return rc;
3470 }
3471
3472 rc = avtab_write(p, &p->te_avtab, fp);
3473 if (rc)
3474 return rc;
3475
3476 rc = cond_write_list(p, p->cond_list, fp);
3477 if (rc)
3478 return rc;
3479
3480 rc = role_trans_write(p, fp);
3481 if (rc)
3482 return rc;
3483
3484 rc = role_allow_write(p->role_allow, fp);
3485 if (rc)
3486 return rc;
3487
3488 rc = filename_trans_write(p, fp);
3489 if (rc)
3490 return rc;
3491
3492 rc = ocontext_write(p, info, fp);
3493 if (rc)
3494 return rc;
3495
3496 rc = genfs_write(p, fp);
3497 if (rc)
3498 return rc;
3499
3500 rc = range_write(p, fp);
3501 if (rc)
3502 return rc;
3503
3504 for (i = 0; i < p->p_types.nprim; i++) {
3505 struct ebitmap *e = &p->type_attr_map_array[i];
3506
3507 rc = ebitmap_write(e, fp);
3508 if (rc)
3509 return rc;
3510 }
3511
3512 return 0;
3513 }