1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Implementation of the policy database.
4 *
5 * Author : Stephen Smalley, <stephen.smalley.work@gmail.com>
6 */
7
8 /*
9 * Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com>
10 *
11 * Support for enhanced MLS infrastructure.
12 *
13 * Updated: Frank Mayer <mayerf@tresys.com> and Karl MacMillan <kmacmillan@tresys.com>
14 *
15 * Added conditional policy language extensions
16 *
17 * Updated: Hewlett-Packard <paul@paul-moore.com>
18 *
19 * Added support for the policy capability bitmap
20 *
21 * Update: Mellanox Techonologies
22 *
23 * Added Infiniband support
24 *
25 * Copyright (C) 2016 Mellanox Techonologies
26 * Copyright (C) 2007 Hewlett-Packard Development Company, L.P.
27 * Copyright (C) 2004-2005 Trusted Computer Solutions, Inc.
28 * Copyright (C) 2003 - 2004 Tresys Technology, LLC
29 */
30
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 #ifdef CONFIG_SECURITY_SELINUX_DEBUG
45 static const char *const symtab_name[SYM_NUM] = {
46 "common prefixes",
47 "classes",
48 "roles",
49 "types",
50 "users",
51 "bools",
52 "levels",
53 "categories",
54 };
55 #endif
56
57 struct policydb_compat_info {
58 unsigned int version;
59 unsigned int sym_num;
60 unsigned int ocon_num;
61 };
62
63 /* These need to be updated if SYM_NUM or OCON_NUM changes */
64 static const struct policydb_compat_info policydb_compat[] = {
65 {
66 .version = POLICYDB_VERSION_BASE,
67 .sym_num = SYM_NUM - 3,
68 .ocon_num = OCON_NUM - 3,
69 },
70 {
71 .version = POLICYDB_VERSION_BOOL,
72 .sym_num = SYM_NUM - 2,
73 .ocon_num = OCON_NUM - 3,
74 },
75 {
76 .version = POLICYDB_VERSION_IPV6,
77 .sym_num = SYM_NUM - 2,
78 .ocon_num = OCON_NUM - 2,
79 },
80 {
81 .version = POLICYDB_VERSION_NLCLASS,
82 .sym_num = SYM_NUM - 2,
83 .ocon_num = OCON_NUM - 2,
84 },
85 {
86 .version = POLICYDB_VERSION_MLS,
87 .sym_num = SYM_NUM,
88 .ocon_num = OCON_NUM - 2,
89 },
90 {
91 .version = POLICYDB_VERSION_AVTAB,
92 .sym_num = SYM_NUM,
93 .ocon_num = OCON_NUM - 2,
94 },
95 {
96 .version = POLICYDB_VERSION_RANGETRANS,
97 .sym_num = SYM_NUM,
98 .ocon_num = OCON_NUM - 2,
99 },
100 {
101 .version = POLICYDB_VERSION_POLCAP,
102 .sym_num = SYM_NUM,
103 .ocon_num = OCON_NUM - 2,
104 },
105 {
106 .version = POLICYDB_VERSION_PERMISSIVE,
107 .sym_num = SYM_NUM,
108 .ocon_num = OCON_NUM - 2,
109 },
110 {
111 .version = POLICYDB_VERSION_BOUNDARY,
112 .sym_num = SYM_NUM,
113 .ocon_num = OCON_NUM - 2,
114 },
115 {
116 .version = POLICYDB_VERSION_FILENAME_TRANS,
117 .sym_num = SYM_NUM,
118 .ocon_num = OCON_NUM - 2,
119 },
120 {
121 .version = POLICYDB_VERSION_ROLETRANS,
122 .sym_num = SYM_NUM,
123 .ocon_num = OCON_NUM - 2,
124 },
125 {
126 .version = POLICYDB_VERSION_NEW_OBJECT_DEFAULTS,
127 .sym_num = SYM_NUM,
128 .ocon_num = OCON_NUM - 2,
129 },
130 {
131 .version = POLICYDB_VERSION_DEFAULT_TYPE,
132 .sym_num = SYM_NUM,
133 .ocon_num = OCON_NUM - 2,
134 },
135 {
136 .version = POLICYDB_VERSION_CONSTRAINT_NAMES,
137 .sym_num = SYM_NUM,
138 .ocon_num = OCON_NUM - 2,
139 },
140 {
141 .version = POLICYDB_VERSION_XPERMS_IOCTL,
142 .sym_num = SYM_NUM,
143 .ocon_num = OCON_NUM - 2,
144 },
145 {
146 .version = POLICYDB_VERSION_INFINIBAND,
147 .sym_num = SYM_NUM,
148 .ocon_num = OCON_NUM,
149 },
150 {
151 .version = POLICYDB_VERSION_GLBLUB,
152 .sym_num = SYM_NUM,
153 .ocon_num = OCON_NUM,
154 },
155 {
156 .version = POLICYDB_VERSION_COMP_FTRANS,
157 .sym_num = SYM_NUM,
158 .ocon_num = OCON_NUM,
159 },
160 };
161
policydb_lookup_compat(unsigned int version)162 static const struct policydb_compat_info *policydb_lookup_compat(unsigned int version)
163 {
164 unsigned int i;
165
166 for (i = 0; i < ARRAY_SIZE(policydb_compat); i++) {
167 if (policydb_compat[i].version == version)
168 return &policydb_compat[i];
169 }
170
171 return NULL;
172 }
173
174 /*
175 * The following *_destroy functions are used to
176 * free any memory allocated for each kind of
177 * symbol data in the policy database.
178 */
179
perm_destroy(void * key,void * datum,void * p)180 static int perm_destroy(void *key, void *datum, void *p)
181 {
182 kfree(key);
183 kfree(datum);
184 return 0;
185 }
186
common_destroy(void * key,void * datum,void * p)187 static int common_destroy(void *key, void *datum, void *p)
188 {
189 struct common_datum *comdatum;
190
191 kfree(key);
192 if (datum) {
193 comdatum = datum;
194 hashtab_map(&comdatum->permissions.table, perm_destroy, NULL);
195 hashtab_destroy(&comdatum->permissions.table);
196 }
197 kfree(datum);
198 return 0;
199 }
200
constraint_expr_destroy(struct constraint_expr * expr)201 static void constraint_expr_destroy(struct constraint_expr *expr)
202 {
203 if (expr) {
204 ebitmap_destroy(&expr->names);
205 if (expr->type_names) {
206 ebitmap_destroy(&expr->type_names->types);
207 ebitmap_destroy(&expr->type_names->negset);
208 kfree(expr->type_names);
209 }
210 kfree(expr);
211 }
212 }
213
cls_destroy(void * key,void * datum,void * p)214 static int cls_destroy(void *key, void *datum, void *p)
215 {
216 struct class_datum *cladatum;
217 struct constraint_node *constraint, *ctemp;
218 struct constraint_expr *e, *etmp;
219
220 kfree(key);
221 if (datum) {
222 cladatum = datum;
223 hashtab_map(&cladatum->permissions.table, perm_destroy, NULL);
224 hashtab_destroy(&cladatum->permissions.table);
225 constraint = cladatum->constraints;
226 while (constraint) {
227 e = constraint->expr;
228 while (e) {
229 etmp = e;
230 e = e->next;
231 constraint_expr_destroy(etmp);
232 }
233 ctemp = constraint;
234 constraint = constraint->next;
235 kfree(ctemp);
236 }
237
238 constraint = cladatum->validatetrans;
239 while (constraint) {
240 e = constraint->expr;
241 while (e) {
242 etmp = e;
243 e = e->next;
244 constraint_expr_destroy(etmp);
245 }
246 ctemp = constraint;
247 constraint = constraint->next;
248 kfree(ctemp);
249 }
250 kfree(cladatum->comkey);
251 }
252 kfree(datum);
253 return 0;
254 }
255
role_destroy(void * key,void * datum,void * p)256 static int role_destroy(void *key, void *datum, void *p)
257 {
258 struct role_datum *role;
259
260 kfree(key);
261 if (datum) {
262 role = datum;
263 ebitmap_destroy(&role->dominates);
264 ebitmap_destroy(&role->types);
265 }
266 kfree(datum);
267 return 0;
268 }
269
type_destroy(void * key,void * datum,void * p)270 static int type_destroy(void *key, void *datum, void *p)
271 {
272 kfree(key);
273 kfree(datum);
274 return 0;
275 }
276
user_destroy(void * key,void * datum,void * p)277 static int user_destroy(void *key, void *datum, void *p)
278 {
279 struct user_datum *usrdatum;
280
281 kfree(key);
282 if (datum) {
283 usrdatum = datum;
284 ebitmap_destroy(&usrdatum->roles);
285 ebitmap_destroy(&usrdatum->range.level[0].cat);
286 ebitmap_destroy(&usrdatum->range.level[1].cat);
287 ebitmap_destroy(&usrdatum->dfltlevel.cat);
288 }
289 kfree(datum);
290 return 0;
291 }
292
sens_destroy(void * key,void * datum,void * p)293 static int sens_destroy(void *key, void *datum, void *p)
294 {
295 struct level_datum *levdatum;
296
297 kfree(key);
298 if (datum) {
299 levdatum = datum;
300 if (levdatum->level)
301 ebitmap_destroy(&levdatum->level->cat);
302 kfree(levdatum->level);
303 }
304 kfree(datum);
305 return 0;
306 }
307
cat_destroy(void * key,void * datum,void * p)308 static int cat_destroy(void *key, void *datum, void *p)
309 {
310 kfree(key);
311 kfree(datum);
312 return 0;
313 }
314
315 static int (*const destroy_f[SYM_NUM]) (void *key, void *datum, void *datap) = {
316 common_destroy,
317 cls_destroy,
318 role_destroy,
319 type_destroy,
320 user_destroy,
321 cond_destroy_bool,
322 sens_destroy,
323 cat_destroy,
324 };
325
filenametr_destroy(void * key,void * datum,void * p)326 static int filenametr_destroy(void *key, void *datum, void *p)
327 {
328 struct filename_trans_key *ft = key;
329 struct filename_trans_datum *next, *d = datum;
330
331 kfree(ft->name);
332 kfree(key);
333 do {
334 ebitmap_destroy(&d->stypes);
335 next = d->next;
336 kfree(d);
337 d = next;
338 } while (unlikely(d));
339 cond_resched();
340 return 0;
341 }
342
range_tr_destroy(void * key,void * datum,void * p)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
role_tr_destroy(void * key,void * datum,void * p)355 static int role_tr_destroy(void *key, void *datum, void *p)
356 {
357 kfree(key);
358 kfree(datum);
359 return 0;
360 }
361
ocontext_destroy(struct ocontext * c,unsigned int i)362 static void ocontext_destroy(struct ocontext *c, unsigned int i)
363 {
364 if (!c)
365 return;
366
367 context_destroy(&c->context[0]);
368 context_destroy(&c->context[1]);
369 if (i == OCON_ISID || i == OCON_FS ||
370 i == OCON_NETIF || i == OCON_FSUSE)
371 kfree(c->u.name);
372 kfree(c);
373 }
374
375 /*
376 * Initialize the role table.
377 */
roles_init(struct policydb * p)378 static int roles_init(struct policydb *p)
379 {
380 char *key = NULL;
381 int rc;
382 struct role_datum *role;
383
384 role = kzalloc(sizeof(*role), GFP_KERNEL);
385 if (!role)
386 return -ENOMEM;
387
388 rc = -EINVAL;
389 role->value = ++p->p_roles.nprim;
390 if (role->value != OBJECT_R_VAL)
391 goto out;
392
393 rc = -ENOMEM;
394 key = kstrdup(OBJECT_R, GFP_KERNEL);
395 if (!key)
396 goto out;
397
398 rc = symtab_insert(&p->p_roles, key, role);
399 if (rc)
400 goto out;
401
402 return 0;
403 out:
404 kfree(key);
405 kfree(role);
406 return rc;
407 }
408
filenametr_hash(const void * k)409 static u32 filenametr_hash(const void *k)
410 {
411 const struct filename_trans_key *ft = k;
412 unsigned long salt = ft->ttype ^ ft->tclass;
413
414 return full_name_hash((void *)salt, ft->name, strlen(ft->name));
415 }
416
filenametr_cmp(const void * k1,const void * k2)417 static int filenametr_cmp(const void *k1, const void *k2)
418 {
419 const struct filename_trans_key *ft1 = k1;
420 const struct filename_trans_key *ft2 = k2;
421 int v;
422
423 v = ft1->ttype - ft2->ttype;
424 if (v)
425 return v;
426
427 v = ft1->tclass - ft2->tclass;
428 if (v)
429 return v;
430
431 return strcmp(ft1->name, ft2->name);
432
433 }
434
435 static const struct hashtab_key_params filenametr_key_params = {
436 .hash = filenametr_hash,
437 .cmp = filenametr_cmp,
438 };
439
policydb_filenametr_search(struct policydb * p,struct filename_trans_key * key)440 struct filename_trans_datum *policydb_filenametr_search(
441 struct policydb *p, struct filename_trans_key *key)
442 {
443 return hashtab_search(&p->filename_trans, key, filenametr_key_params);
444 }
445
rangetr_hash(const void * k)446 static u32 rangetr_hash(const void *k)
447 {
448 const struct range_trans *key = k;
449
450 return key->source_type + (key->target_type << 3) +
451 (key->target_class << 5);
452 }
453
rangetr_cmp(const void * k1,const void * k2)454 static int rangetr_cmp(const void *k1, const void *k2)
455 {
456 const struct range_trans *key1 = k1, *key2 = k2;
457 int v;
458
459 v = key1->source_type - key2->source_type;
460 if (v)
461 return v;
462
463 v = key1->target_type - key2->target_type;
464 if (v)
465 return v;
466
467 v = key1->target_class - key2->target_class;
468
469 return v;
470 }
471
472 static const struct hashtab_key_params rangetr_key_params = {
473 .hash = rangetr_hash,
474 .cmp = rangetr_cmp,
475 };
476
policydb_rangetr_search(struct policydb * p,struct range_trans * key)477 struct mls_range *policydb_rangetr_search(struct policydb *p,
478 struct range_trans *key)
479 {
480 return hashtab_search(&p->range_tr, key, rangetr_key_params);
481 }
482
role_trans_hash(const void * k)483 static u32 role_trans_hash(const void *k)
484 {
485 const struct role_trans_key *key = k;
486
487 return jhash_3words(key->role, key->type, (u32)key->tclass << 16 | key->tclass, 0);
488 }
489
role_trans_cmp(const void * k1,const void * k2)490 static int role_trans_cmp(const void *k1, const void *k2)
491 {
492 const struct role_trans_key *key1 = k1, *key2 = k2;
493 int v;
494
495 v = key1->role - key2->role;
496 if (v)
497 return v;
498
499 v = key1->type - key2->type;
500 if (v)
501 return v;
502
503 return key1->tclass - key2->tclass;
504 }
505
506 static const struct hashtab_key_params roletr_key_params = {
507 .hash = role_trans_hash,
508 .cmp = role_trans_cmp,
509 };
510
policydb_roletr_search(struct policydb * p,struct role_trans_key * key)511 struct role_trans_datum *policydb_roletr_search(struct policydb *p,
512 struct role_trans_key *key)
513 {
514 return hashtab_search(&p->role_tr, key, roletr_key_params);
515 }
516
517 /*
518 * Initialize a policy database structure.
519 */
policydb_init(struct policydb * p)520 static void policydb_init(struct policydb *p)
521 {
522 memset(p, 0, sizeof(*p));
523
524 avtab_init(&p->te_avtab);
525 cond_policydb_init(p);
526
527 ebitmap_init(&p->filename_trans_ttypes);
528 ebitmap_init(&p->policycaps);
529 ebitmap_init(&p->permissive_map);
530 }
531
532 /*
533 * The following *_index functions are used to
534 * define the val_to_name and val_to_struct arrays
535 * in a policy database structure. The val_to_name
536 * arrays are used when converting security context
537 * structures into string representations. The
538 * val_to_struct arrays are used when the attributes
539 * of a class, role, or user are needed.
540 */
541
common_index(void * key,void * datum,void * datap)542 static int common_index(void *key, void *datum, void *datap)
543 {
544 struct policydb *p;
545 struct common_datum *comdatum;
546
547 comdatum = datum;
548 p = datap;
549 if (!comdatum->value || comdatum->value > p->p_commons.nprim)
550 return -EINVAL;
551
552 p->sym_val_to_name[SYM_COMMONS][comdatum->value - 1] = key;
553
554 return 0;
555 }
556
class_index(void * key,void * datum,void * datap)557 static int class_index(void *key, void *datum, void *datap)
558 {
559 struct policydb *p;
560 struct class_datum *cladatum;
561
562 cladatum = datum;
563 p = datap;
564 if (!cladatum->value || cladatum->value > p->p_classes.nprim)
565 return -EINVAL;
566
567 p->sym_val_to_name[SYM_CLASSES][cladatum->value - 1] = key;
568 p->class_val_to_struct[cladatum->value - 1] = cladatum;
569 return 0;
570 }
571
role_index(void * key,void * datum,void * datap)572 static int role_index(void *key, void *datum, void *datap)
573 {
574 struct policydb *p;
575 struct role_datum *role;
576
577 role = datum;
578 p = datap;
579 if (!role->value
580 || role->value > p->p_roles.nprim
581 || role->bounds > p->p_roles.nprim)
582 return -EINVAL;
583
584 p->sym_val_to_name[SYM_ROLES][role->value - 1] = key;
585 p->role_val_to_struct[role->value - 1] = role;
586 return 0;
587 }
588
type_index(void * key,void * datum,void * datap)589 static int type_index(void *key, void *datum, void *datap)
590 {
591 struct policydb *p;
592 struct type_datum *typdatum;
593
594 typdatum = datum;
595 p = datap;
596
597 if (typdatum->primary) {
598 if (!typdatum->value
599 || typdatum->value > p->p_types.nprim
600 || typdatum->bounds > p->p_types.nprim)
601 return -EINVAL;
602 p->sym_val_to_name[SYM_TYPES][typdatum->value - 1] = key;
603 p->type_val_to_struct[typdatum->value - 1] = typdatum;
604 }
605
606 return 0;
607 }
608
user_index(void * key,void * datum,void * datap)609 static int user_index(void *key, void *datum, void *datap)
610 {
611 struct policydb *p;
612 struct user_datum *usrdatum;
613
614 usrdatum = datum;
615 p = datap;
616 if (!usrdatum->value
617 || usrdatum->value > p->p_users.nprim
618 || usrdatum->bounds > p->p_users.nprim)
619 return -EINVAL;
620
621 p->sym_val_to_name[SYM_USERS][usrdatum->value - 1] = key;
622 p->user_val_to_struct[usrdatum->value - 1] = usrdatum;
623 return 0;
624 }
625
sens_index(void * key,void * datum,void * datap)626 static int sens_index(void *key, void *datum, void *datap)
627 {
628 struct policydb *p;
629 struct level_datum *levdatum;
630
631 levdatum = datum;
632 p = datap;
633
634 if (!levdatum->isalias) {
635 if (!levdatum->level->sens ||
636 levdatum->level->sens > p->p_levels.nprim)
637 return -EINVAL;
638
639 p->sym_val_to_name[SYM_LEVELS][levdatum->level->sens - 1] = key;
640 }
641
642 return 0;
643 }
644
cat_index(void * key,void * datum,void * datap)645 static int cat_index(void *key, void *datum, void *datap)
646 {
647 struct policydb *p;
648 struct cat_datum *catdatum;
649
650 catdatum = datum;
651 p = datap;
652
653 if (!catdatum->isalias) {
654 if (!catdatum->value || catdatum->value > p->p_cats.nprim)
655 return -EINVAL;
656
657 p->sym_val_to_name[SYM_CATS][catdatum->value - 1] = key;
658 }
659
660 return 0;
661 }
662
663 static int (*const index_f[SYM_NUM]) (void *key, void *datum, void *datap) = {
664 common_index,
665 class_index,
666 role_index,
667 type_index,
668 user_index,
669 cond_index_bool,
670 sens_index,
671 cat_index,
672 };
673
674 #ifdef CONFIG_SECURITY_SELINUX_DEBUG
hash_eval(struct hashtab * h,const char * hash_name)675 static void hash_eval(struct hashtab *h, const char *hash_name)
676 {
677 struct hashtab_info info;
678
679 hashtab_stat(h, &info);
680 pr_debug("SELinux: %s: %d entries and %d/%d buckets used, longest chain length %d, sum of chain length^2 %llu\n",
681 hash_name, h->nel, info.slots_used, h->size,
682 info.max_chain_len, info.chain2_len_sum);
683 }
684
symtab_hash_eval(struct symtab * s)685 static void symtab_hash_eval(struct symtab *s)
686 {
687 int i;
688
689 for (i = 0; i < SYM_NUM; i++)
690 hash_eval(&s[i].table, symtab_name[i]);
691 }
692
693 #else
hash_eval(struct hashtab * h,const char * hash_name)694 static inline void hash_eval(struct hashtab *h, const char *hash_name)
695 {
696 }
symtab_hash_eval(struct symtab * s)697 static inline void symtab_hash_eval(struct symtab *s)
698 {
699 }
700 #endif /* CONFIG_SECURITY_SELINUX_DEBUG */
701
702 /*
703 * Define the other val_to_name and val_to_struct arrays
704 * in a policy database structure.
705 *
706 * Caller must clean up on failure.
707 */
policydb_index(struct policydb * p)708 static int policydb_index(struct policydb *p)
709 {
710 int i, rc;
711
712 if (p->mls_enabled)
713 pr_debug("SELinux: %d users, %d roles, %d types, %d bools, %d sens, %d cats\n",
714 p->p_users.nprim, p->p_roles.nprim, p->p_types.nprim,
715 p->p_bools.nprim, p->p_levels.nprim, p->p_cats.nprim);
716 else
717 pr_debug("SELinux: %d users, %d roles, %d types, %d bools\n",
718 p->p_users.nprim, p->p_roles.nprim, p->p_types.nprim,
719 p->p_bools.nprim);
720
721 pr_debug("SELinux: %d classes, %d rules\n",
722 p->p_classes.nprim, p->te_avtab.nel);
723
724 avtab_hash_eval(&p->te_avtab, "rules");
725 symtab_hash_eval(p->symtab);
726
727 p->class_val_to_struct = kcalloc(p->p_classes.nprim,
728 sizeof(*p->class_val_to_struct),
729 GFP_KERNEL);
730 if (!p->class_val_to_struct)
731 return -ENOMEM;
732
733 p->role_val_to_struct = kcalloc(p->p_roles.nprim,
734 sizeof(*p->role_val_to_struct),
735 GFP_KERNEL);
736 if (!p->role_val_to_struct)
737 return -ENOMEM;
738
739 p->user_val_to_struct = kcalloc(p->p_users.nprim,
740 sizeof(*p->user_val_to_struct),
741 GFP_KERNEL);
742 if (!p->user_val_to_struct)
743 return -ENOMEM;
744
745 p->type_val_to_struct = kvcalloc(p->p_types.nprim,
746 sizeof(*p->type_val_to_struct),
747 GFP_KERNEL);
748 if (!p->type_val_to_struct)
749 return -ENOMEM;
750
751 rc = cond_init_bool_indexes(p);
752 if (rc)
753 goto out;
754
755 for (i = 0; i < SYM_NUM; i++) {
756 p->sym_val_to_name[i] = kvcalloc(p->symtab[i].nprim,
757 sizeof(char *),
758 GFP_KERNEL);
759 if (!p->sym_val_to_name[i])
760 return -ENOMEM;
761
762 rc = hashtab_map(&p->symtab[i].table, index_f[i], p);
763 if (rc)
764 goto out;
765 }
766 rc = 0;
767 out:
768 return rc;
769 }
770
771 /*
772 * Free any memory allocated by a policy database structure.
773 */
policydb_destroy(struct policydb * p)774 void policydb_destroy(struct policydb *p)
775 {
776 struct ocontext *c, *ctmp;
777 struct genfs *g, *gtmp;
778 u32 i;
779 struct role_allow *ra, *lra = NULL;
780
781 for (i = 0; i < SYM_NUM; i++) {
782 cond_resched();
783 hashtab_map(&p->symtab[i].table, destroy_f[i], NULL);
784 hashtab_destroy(&p->symtab[i].table);
785 }
786
787 for (i = 0; i < SYM_NUM; i++)
788 kvfree(p->sym_val_to_name[i]);
789
790 kfree(p->class_val_to_struct);
791 kfree(p->role_val_to_struct);
792 kfree(p->user_val_to_struct);
793 kvfree(p->type_val_to_struct);
794
795 avtab_destroy(&p->te_avtab);
796
797 for (i = 0; i < OCON_NUM; i++) {
798 cond_resched();
799 c = p->ocontexts[i];
800 while (c) {
801 ctmp = c;
802 c = c->next;
803 ocontext_destroy(ctmp, i);
804 }
805 p->ocontexts[i] = NULL;
806 }
807
808 g = p->genfs;
809 while (g) {
810 cond_resched();
811 kfree(g->fstype);
812 c = g->head;
813 while (c) {
814 ctmp = c;
815 c = c->next;
816 ocontext_destroy(ctmp, OCON_FSUSE);
817 }
818 gtmp = g;
819 g = g->next;
820 kfree(gtmp);
821 }
822 p->genfs = NULL;
823
824 cond_policydb_destroy(p);
825
826 hashtab_map(&p->role_tr, role_tr_destroy, NULL);
827 hashtab_destroy(&p->role_tr);
828
829 for (ra = p->role_allow; ra; ra = ra->next) {
830 cond_resched();
831 kfree(lra);
832 lra = ra;
833 }
834 kfree(lra);
835
836 hashtab_map(&p->filename_trans, filenametr_destroy, NULL);
837 hashtab_destroy(&p->filename_trans);
838
839 hashtab_map(&p->range_tr, range_tr_destroy, NULL);
840 hashtab_destroy(&p->range_tr);
841
842 if (p->type_attr_map_array) {
843 for (i = 0; i < p->p_types.nprim; i++)
844 ebitmap_destroy(&p->type_attr_map_array[i]);
845 kvfree(p->type_attr_map_array);
846 }
847
848 ebitmap_destroy(&p->filename_trans_ttypes);
849 ebitmap_destroy(&p->policycaps);
850 ebitmap_destroy(&p->permissive_map);
851 }
852
853 /*
854 * Load the initial SIDs specified in a policy database
855 * structure into a SID table.
856 */
policydb_load_isids(struct policydb * p,struct sidtab * s)857 int policydb_load_isids(struct policydb *p, struct sidtab *s)
858 {
859 struct ocontext *head, *c;
860 bool isid_init_supported = ebitmap_get_bit(&p->policycaps,
861 POLICYDB_CAP_USERSPACE_INITIAL_CONTEXT);
862 int rc;
863
864 rc = sidtab_init(s);
865 if (rc) {
866 pr_err("SELinux: out of memory on SID table init\n");
867 return rc;
868 }
869
870 head = p->ocontexts[OCON_ISID];
871 for (c = head; c; c = c->next) {
872 u32 sid = c->sid[0];
873 const char *name = security_get_initial_sid_context(sid);
874
875 if (sid == SECSID_NULL) {
876 pr_err("SELinux: SID 0 was assigned a context.\n");
877 sidtab_destroy(s);
878 return -EINVAL;
879 }
880
881 /* Ignore initial SIDs unused by this kernel. */
882 if (!name)
883 continue;
884
885 /*
886 * Also ignore SECINITSID_INIT if the policy doesn't declare
887 * support for it
888 */
889 if (sid == SECINITSID_INIT && !isid_init_supported)
890 continue;
891
892 rc = sidtab_set_initial(s, sid, &c->context[0]);
893 if (rc) {
894 pr_err("SELinux: unable to load initial SID %s.\n",
895 name);
896 sidtab_destroy(s);
897 return rc;
898 }
899
900 /*
901 * If the policy doesn't support the "userspace_initial_context"
902 * capability, set SECINITSID_INIT to the same context as
903 * SECINITSID_KERNEL. This ensures the same behavior as before
904 * the reintroduction of SECINITSID_INIT, where all tasks
905 * started before policy load would initially get the context
906 * corresponding to SECINITSID_KERNEL.
907 */
908 if (sid == SECINITSID_KERNEL && !isid_init_supported) {
909 rc = sidtab_set_initial(s, SECINITSID_INIT, &c->context[0]);
910 if (rc) {
911 pr_err("SELinux: unable to load initial SID %s.\n",
912 name);
913 sidtab_destroy(s);
914 return rc;
915 }
916 }
917 }
918 return 0;
919 }
920
policydb_class_isvalid(struct policydb * p,unsigned int class)921 int policydb_class_isvalid(struct policydb *p, unsigned int class)
922 {
923 if (!class || class > p->p_classes.nprim)
924 return 0;
925 return 1;
926 }
927
policydb_role_isvalid(struct policydb * p,unsigned int role)928 int policydb_role_isvalid(struct policydb *p, unsigned int role)
929 {
930 if (!role || role > p->p_roles.nprim)
931 return 0;
932 return 1;
933 }
934
policydb_type_isvalid(struct policydb * p,unsigned int type)935 int policydb_type_isvalid(struct policydb *p, unsigned int type)
936 {
937 if (!type || type > p->p_types.nprim)
938 return 0;
939 return 1;
940 }
941
942 /*
943 * Return 1 if the fields in the security context
944 * structure `c' are valid. Return 0 otherwise.
945 */
policydb_context_isvalid(struct policydb * p,struct context * c)946 int policydb_context_isvalid(struct policydb *p, struct context *c)
947 {
948 struct role_datum *role;
949 struct user_datum *usrdatum;
950
951 if (!c->role || c->role > p->p_roles.nprim)
952 return 0;
953
954 if (!c->user || c->user > p->p_users.nprim)
955 return 0;
956
957 if (!c->type || c->type > p->p_types.nprim)
958 return 0;
959
960 if (c->role != OBJECT_R_VAL) {
961 /*
962 * Role must be authorized for the type.
963 */
964 role = p->role_val_to_struct[c->role - 1];
965 if (!role || !ebitmap_get_bit(&role->types, c->type - 1))
966 /* role may not be associated with type */
967 return 0;
968
969 /*
970 * User must be authorized for the role.
971 */
972 usrdatum = p->user_val_to_struct[c->user - 1];
973 if (!usrdatum)
974 return 0;
975
976 if (!ebitmap_get_bit(&usrdatum->roles, c->role - 1))
977 /* user may not be associated with role */
978 return 0;
979 }
980
981 if (!mls_context_isvalid(p, c))
982 return 0;
983
984 return 1;
985 }
986
987 /*
988 * Read a MLS range structure from a policydb binary
989 * representation file.
990 */
mls_read_range_helper(struct mls_range * r,void * fp)991 static int mls_read_range_helper(struct mls_range *r, void *fp)
992 {
993 __le32 buf[2];
994 u32 items;
995 int rc;
996
997 rc = next_entry(buf, fp, sizeof(u32));
998 if (rc)
999 goto out;
1000
1001 rc = -EINVAL;
1002 items = le32_to_cpu(buf[0]);
1003 if (items > ARRAY_SIZE(buf)) {
1004 pr_err("SELinux: mls: range overflow\n");
1005 goto out;
1006 }
1007
1008 rc = next_entry(buf, fp, sizeof(u32) * items);
1009 if (rc) {
1010 pr_err("SELinux: mls: truncated range\n");
1011 goto out;
1012 }
1013
1014 r->level[0].sens = le32_to_cpu(buf[0]);
1015 if (items > 1)
1016 r->level[1].sens = le32_to_cpu(buf[1]);
1017 else
1018 r->level[1].sens = r->level[0].sens;
1019
1020 rc = ebitmap_read(&r->level[0].cat, fp);
1021 if (rc) {
1022 pr_err("SELinux: mls: error reading low categories\n");
1023 goto out;
1024 }
1025 if (items > 1) {
1026 rc = ebitmap_read(&r->level[1].cat, fp);
1027 if (rc) {
1028 pr_err("SELinux: mls: error reading high categories\n");
1029 goto bad_high;
1030 }
1031 } else {
1032 rc = ebitmap_cpy(&r->level[1].cat, &r->level[0].cat);
1033 if (rc) {
1034 pr_err("SELinux: mls: out of memory\n");
1035 goto bad_high;
1036 }
1037 }
1038
1039 return 0;
1040 bad_high:
1041 ebitmap_destroy(&r->level[0].cat);
1042 out:
1043 return rc;
1044 }
1045
1046 /*
1047 * Read and validate a security context structure
1048 * from a policydb binary representation file.
1049 */
context_read_and_validate(struct context * c,struct policydb * p,void * fp)1050 static int context_read_and_validate(struct context *c,
1051 struct policydb *p,
1052 void *fp)
1053 {
1054 __le32 buf[3];
1055 int rc;
1056
1057 rc = next_entry(buf, fp, sizeof buf);
1058 if (rc) {
1059 pr_err("SELinux: context truncated\n");
1060 goto out;
1061 }
1062 c->user = le32_to_cpu(buf[0]);
1063 c->role = le32_to_cpu(buf[1]);
1064 c->type = le32_to_cpu(buf[2]);
1065 if (p->policyvers >= POLICYDB_VERSION_MLS) {
1066 rc = mls_read_range_helper(&c->range, fp);
1067 if (rc) {
1068 pr_err("SELinux: error reading MLS range of context\n");
1069 goto out;
1070 }
1071 }
1072
1073 rc = -EINVAL;
1074 if (!policydb_context_isvalid(p, c)) {
1075 pr_err("SELinux: invalid security context\n");
1076 context_destroy(c);
1077 goto out;
1078 }
1079 rc = 0;
1080 out:
1081 return rc;
1082 }
1083
1084 /*
1085 * The following *_read functions are used to
1086 * read the symbol data from a policy database
1087 * binary representation file.
1088 */
1089
str_read(char ** strp,gfp_t flags,void * fp,u32 len)1090 static int str_read(char **strp, gfp_t flags, void *fp, u32 len)
1091 {
1092 int rc;
1093 char *str;
1094
1095 if ((len == 0) || (len == (u32)-1))
1096 return -EINVAL;
1097
1098 str = kmalloc(len + 1, flags | __GFP_NOWARN);
1099 if (!str)
1100 return -ENOMEM;
1101
1102 rc = next_entry(str, fp, len);
1103 if (rc) {
1104 kfree(str);
1105 return rc;
1106 }
1107
1108 str[len] = '\0';
1109 *strp = str;
1110 return 0;
1111 }
1112
perm_read(struct policydb * p,struct symtab * s,void * fp)1113 static int perm_read(struct policydb *p, struct symtab *s, void *fp)
1114 {
1115 char *key = NULL;
1116 struct perm_datum *perdatum;
1117 int rc;
1118 __le32 buf[2];
1119 u32 len;
1120
1121 perdatum = kzalloc(sizeof(*perdatum), GFP_KERNEL);
1122 if (!perdatum)
1123 return -ENOMEM;
1124
1125 rc = next_entry(buf, fp, sizeof buf);
1126 if (rc)
1127 goto bad;
1128
1129 len = le32_to_cpu(buf[0]);
1130 perdatum->value = le32_to_cpu(buf[1]);
1131
1132 rc = str_read(&key, GFP_KERNEL, fp, len);
1133 if (rc)
1134 goto bad;
1135
1136 rc = symtab_insert(s, key, perdatum);
1137 if (rc)
1138 goto bad;
1139
1140 return 0;
1141 bad:
1142 perm_destroy(key, perdatum, NULL);
1143 return rc;
1144 }
1145
common_read(struct policydb * p,struct symtab * s,void * fp)1146 static int common_read(struct policydb *p, struct symtab *s, void *fp)
1147 {
1148 char *key = NULL;
1149 struct common_datum *comdatum;
1150 __le32 buf[4];
1151 u32 i, len, nel;
1152 int rc;
1153
1154 comdatum = kzalloc(sizeof(*comdatum), GFP_KERNEL);
1155 if (!comdatum)
1156 return -ENOMEM;
1157
1158 rc = next_entry(buf, fp, sizeof buf);
1159 if (rc)
1160 goto bad;
1161
1162 len = le32_to_cpu(buf[0]);
1163 comdatum->value = le32_to_cpu(buf[1]);
1164 nel = le32_to_cpu(buf[3]);
1165
1166 rc = symtab_init(&comdatum->permissions, nel);
1167 if (rc)
1168 goto bad;
1169 comdatum->permissions.nprim = le32_to_cpu(buf[2]);
1170
1171 rc = str_read(&key, GFP_KERNEL, fp, len);
1172 if (rc)
1173 goto bad;
1174
1175 for (i = 0; i < nel; i++) {
1176 rc = perm_read(p, &comdatum->permissions, fp);
1177 if (rc)
1178 goto bad;
1179 }
1180
1181 rc = symtab_insert(s, key, comdatum);
1182 if (rc)
1183 goto bad;
1184 return 0;
1185 bad:
1186 common_destroy(key, comdatum, NULL);
1187 return rc;
1188 }
1189
type_set_init(struct type_set * t)1190 static void type_set_init(struct type_set *t)
1191 {
1192 ebitmap_init(&t->types);
1193 ebitmap_init(&t->negset);
1194 }
1195
type_set_read(struct type_set * t,void * fp)1196 static int type_set_read(struct type_set *t, void *fp)
1197 {
1198 __le32 buf[1];
1199 int rc;
1200
1201 if (ebitmap_read(&t->types, fp))
1202 return -EINVAL;
1203 if (ebitmap_read(&t->negset, fp))
1204 return -EINVAL;
1205
1206 rc = next_entry(buf, fp, sizeof(u32));
1207 if (rc < 0)
1208 return -EINVAL;
1209 t->flags = le32_to_cpu(buf[0]);
1210
1211 return 0;
1212 }
1213
1214
read_cons_helper(struct policydb * p,struct constraint_node ** nodep,u32 ncons,int allowxtarget,void * fp)1215 static int read_cons_helper(struct policydb *p,
1216 struct constraint_node **nodep,
1217 u32 ncons, int allowxtarget, void *fp)
1218 {
1219 struct constraint_node *c, *lc;
1220 struct constraint_expr *e, *le;
1221 __le32 buf[3];
1222 u32 i, j, nexpr;
1223 int rc, depth;
1224
1225 lc = NULL;
1226 for (i = 0; i < ncons; i++) {
1227 c = kzalloc(sizeof(*c), GFP_KERNEL);
1228 if (!c)
1229 return -ENOMEM;
1230
1231 if (lc)
1232 lc->next = c;
1233 else
1234 *nodep = c;
1235
1236 rc = next_entry(buf, fp, (sizeof(u32) * 2));
1237 if (rc)
1238 return rc;
1239 c->permissions = le32_to_cpu(buf[0]);
1240 nexpr = le32_to_cpu(buf[1]);
1241 le = NULL;
1242 depth = -1;
1243 for (j = 0; j < nexpr; j++) {
1244 e = kzalloc(sizeof(*e), GFP_KERNEL);
1245 if (!e)
1246 return -ENOMEM;
1247
1248 if (le)
1249 le->next = e;
1250 else
1251 c->expr = e;
1252
1253 rc = next_entry(buf, fp, (sizeof(u32) * 3));
1254 if (rc)
1255 return rc;
1256 e->expr_type = le32_to_cpu(buf[0]);
1257 e->attr = le32_to_cpu(buf[1]);
1258 e->op = le32_to_cpu(buf[2]);
1259
1260 switch (e->expr_type) {
1261 case CEXPR_NOT:
1262 if (depth < 0)
1263 return -EINVAL;
1264 break;
1265 case CEXPR_AND:
1266 case CEXPR_OR:
1267 if (depth < 1)
1268 return -EINVAL;
1269 depth--;
1270 break;
1271 case CEXPR_ATTR:
1272 if (depth == (CEXPR_MAXDEPTH - 1))
1273 return -EINVAL;
1274 depth++;
1275 break;
1276 case CEXPR_NAMES:
1277 if (!allowxtarget && (e->attr & CEXPR_XTARGET))
1278 return -EINVAL;
1279 if (depth == (CEXPR_MAXDEPTH - 1))
1280 return -EINVAL;
1281 depth++;
1282 rc = ebitmap_read(&e->names, fp);
1283 if (rc)
1284 return rc;
1285 if (p->policyvers >=
1286 POLICYDB_VERSION_CONSTRAINT_NAMES) {
1287 e->type_names = kzalloc(sizeof
1288 (*e->type_names), GFP_KERNEL);
1289 if (!e->type_names)
1290 return -ENOMEM;
1291 type_set_init(e->type_names);
1292 rc = type_set_read(e->type_names, fp);
1293 if (rc)
1294 return rc;
1295 }
1296 break;
1297 default:
1298 return -EINVAL;
1299 }
1300 le = e;
1301 }
1302 if (depth != 0)
1303 return -EINVAL;
1304 lc = c;
1305 }
1306
1307 return 0;
1308 }
1309
class_read(struct policydb * p,struct symtab * s,void * fp)1310 static int class_read(struct policydb *p, struct symtab *s, void *fp)
1311 {
1312 char *key = NULL;
1313 struct class_datum *cladatum;
1314 __le32 buf[6];
1315 u32 i, len, len2, ncons, nel;
1316 int rc;
1317
1318 cladatum = kzalloc(sizeof(*cladatum), GFP_KERNEL);
1319 if (!cladatum)
1320 return -ENOMEM;
1321
1322 rc = next_entry(buf, fp, sizeof(u32)*6);
1323 if (rc)
1324 goto bad;
1325
1326 len = le32_to_cpu(buf[0]);
1327 len2 = le32_to_cpu(buf[1]);
1328 cladatum->value = le32_to_cpu(buf[2]);
1329 nel = le32_to_cpu(buf[4]);
1330
1331 rc = symtab_init(&cladatum->permissions, nel);
1332 if (rc)
1333 goto bad;
1334 cladatum->permissions.nprim = le32_to_cpu(buf[3]);
1335
1336 ncons = le32_to_cpu(buf[5]);
1337
1338 rc = str_read(&key, GFP_KERNEL, fp, len);
1339 if (rc)
1340 goto bad;
1341
1342 if (len2) {
1343 rc = str_read(&cladatum->comkey, GFP_KERNEL, fp, len2);
1344 if (rc)
1345 goto bad;
1346
1347 rc = -EINVAL;
1348 cladatum->comdatum = symtab_search(&p->p_commons,
1349 cladatum->comkey);
1350 if (!cladatum->comdatum) {
1351 pr_err("SELinux: unknown common %s\n",
1352 cladatum->comkey);
1353 goto bad;
1354 }
1355 }
1356 for (i = 0; i < nel; i++) {
1357 rc = perm_read(p, &cladatum->permissions, fp);
1358 if (rc)
1359 goto bad;
1360 }
1361
1362 rc = read_cons_helper(p, &cladatum->constraints, ncons, 0, fp);
1363 if (rc)
1364 goto bad;
1365
1366 if (p->policyvers >= POLICYDB_VERSION_VALIDATETRANS) {
1367 /* grab the validatetrans rules */
1368 rc = next_entry(buf, fp, sizeof(u32));
1369 if (rc)
1370 goto bad;
1371 ncons = le32_to_cpu(buf[0]);
1372 rc = read_cons_helper(p, &cladatum->validatetrans,
1373 ncons, 1, fp);
1374 if (rc)
1375 goto bad;
1376 }
1377
1378 if (p->policyvers >= POLICYDB_VERSION_NEW_OBJECT_DEFAULTS) {
1379 rc = next_entry(buf, fp, sizeof(u32) * 3);
1380 if (rc)
1381 goto bad;
1382
1383 cladatum->default_user = le32_to_cpu(buf[0]);
1384 cladatum->default_role = le32_to_cpu(buf[1]);
1385 cladatum->default_range = le32_to_cpu(buf[2]);
1386 }
1387
1388 if (p->policyvers >= POLICYDB_VERSION_DEFAULT_TYPE) {
1389 rc = next_entry(buf, fp, sizeof(u32) * 1);
1390 if (rc)
1391 goto bad;
1392 cladatum->default_type = le32_to_cpu(buf[0]);
1393 }
1394
1395 rc = symtab_insert(s, key, cladatum);
1396 if (rc)
1397 goto bad;
1398
1399 return 0;
1400 bad:
1401 cls_destroy(key, cladatum, NULL);
1402 return rc;
1403 }
1404
role_read(struct policydb * p,struct symtab * s,void * fp)1405 static int role_read(struct policydb *p, struct symtab *s, void *fp)
1406 {
1407 char *key = NULL;
1408 struct role_datum *role;
1409 int rc;
1410 unsigned int to_read = 2;
1411 __le32 buf[3];
1412 u32 len;
1413
1414 role = kzalloc(sizeof(*role), GFP_KERNEL);
1415 if (!role)
1416 return -ENOMEM;
1417
1418 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1419 to_read = 3;
1420
1421 rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1422 if (rc)
1423 goto bad;
1424
1425 len = le32_to_cpu(buf[0]);
1426 role->value = le32_to_cpu(buf[1]);
1427 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1428 role->bounds = le32_to_cpu(buf[2]);
1429
1430 rc = str_read(&key, GFP_KERNEL, fp, len);
1431 if (rc)
1432 goto bad;
1433
1434 rc = ebitmap_read(&role->dominates, fp);
1435 if (rc)
1436 goto bad;
1437
1438 rc = ebitmap_read(&role->types, fp);
1439 if (rc)
1440 goto bad;
1441
1442 if (strcmp(key, OBJECT_R) == 0) {
1443 rc = -EINVAL;
1444 if (role->value != OBJECT_R_VAL) {
1445 pr_err("SELinux: Role %s has wrong value %d\n",
1446 OBJECT_R, role->value);
1447 goto bad;
1448 }
1449 rc = 0;
1450 goto bad;
1451 }
1452
1453 rc = symtab_insert(s, key, role);
1454 if (rc)
1455 goto bad;
1456 return 0;
1457 bad:
1458 role_destroy(key, role, NULL);
1459 return rc;
1460 }
1461
type_read(struct policydb * p,struct symtab * s,void * fp)1462 static int type_read(struct policydb *p, struct symtab *s, void *fp)
1463 {
1464 char *key = NULL;
1465 struct type_datum *typdatum;
1466 int rc;
1467 unsigned int to_read = 3;
1468 __le32 buf[4];
1469 u32 len;
1470
1471 typdatum = kzalloc(sizeof(*typdatum), GFP_KERNEL);
1472 if (!typdatum)
1473 return -ENOMEM;
1474
1475 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1476 to_read = 4;
1477
1478 rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1479 if (rc)
1480 goto bad;
1481
1482 len = le32_to_cpu(buf[0]);
1483 typdatum->value = le32_to_cpu(buf[1]);
1484 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) {
1485 u32 prop = le32_to_cpu(buf[2]);
1486
1487 if (prop & TYPEDATUM_PROPERTY_PRIMARY)
1488 typdatum->primary = 1;
1489 if (prop & TYPEDATUM_PROPERTY_ATTRIBUTE)
1490 typdatum->attribute = 1;
1491
1492 typdatum->bounds = le32_to_cpu(buf[3]);
1493 } else {
1494 typdatum->primary = le32_to_cpu(buf[2]);
1495 }
1496
1497 rc = str_read(&key, GFP_KERNEL, fp, len);
1498 if (rc)
1499 goto bad;
1500
1501 rc = symtab_insert(s, key, typdatum);
1502 if (rc)
1503 goto bad;
1504 return 0;
1505 bad:
1506 type_destroy(key, typdatum, NULL);
1507 return rc;
1508 }
1509
1510
1511 /*
1512 * Read a MLS level structure from a policydb binary
1513 * representation file.
1514 */
mls_read_level(struct mls_level * lp,void * fp)1515 static int mls_read_level(struct mls_level *lp, void *fp)
1516 {
1517 __le32 buf[1];
1518 int rc;
1519
1520 memset(lp, 0, sizeof(*lp));
1521
1522 rc = next_entry(buf, fp, sizeof buf);
1523 if (rc) {
1524 pr_err("SELinux: mls: truncated level\n");
1525 return rc;
1526 }
1527 lp->sens = le32_to_cpu(buf[0]);
1528
1529 rc = ebitmap_read(&lp->cat, fp);
1530 if (rc) {
1531 pr_err("SELinux: mls: error reading level categories\n");
1532 return rc;
1533 }
1534 return 0;
1535 }
1536
user_read(struct policydb * p,struct symtab * s,void * fp)1537 static int user_read(struct policydb *p, struct symtab *s, void *fp)
1538 {
1539 char *key = NULL;
1540 struct user_datum *usrdatum;
1541 int rc;
1542 unsigned int to_read = 2;
1543 __le32 buf[3];
1544 u32 len;
1545
1546 usrdatum = kzalloc(sizeof(*usrdatum), GFP_KERNEL);
1547 if (!usrdatum)
1548 return -ENOMEM;
1549
1550 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1551 to_read = 3;
1552
1553 rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1554 if (rc)
1555 goto bad;
1556
1557 len = le32_to_cpu(buf[0]);
1558 usrdatum->value = le32_to_cpu(buf[1]);
1559 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1560 usrdatum->bounds = le32_to_cpu(buf[2]);
1561
1562 rc = str_read(&key, GFP_KERNEL, fp, len);
1563 if (rc)
1564 goto bad;
1565
1566 rc = ebitmap_read(&usrdatum->roles, fp);
1567 if (rc)
1568 goto bad;
1569
1570 if (p->policyvers >= POLICYDB_VERSION_MLS) {
1571 rc = mls_read_range_helper(&usrdatum->range, fp);
1572 if (rc)
1573 goto bad;
1574 rc = mls_read_level(&usrdatum->dfltlevel, fp);
1575 if (rc)
1576 goto bad;
1577 }
1578
1579 rc = symtab_insert(s, key, usrdatum);
1580 if (rc)
1581 goto bad;
1582 return 0;
1583 bad:
1584 user_destroy(key, usrdatum, NULL);
1585 return rc;
1586 }
1587
sens_read(struct policydb * p,struct symtab * s,void * fp)1588 static int sens_read(struct policydb *p, struct symtab *s, void *fp)
1589 {
1590 char *key = NULL;
1591 struct level_datum *levdatum;
1592 int rc;
1593 __le32 buf[2];
1594 u32 len;
1595
1596 levdatum = kzalloc(sizeof(*levdatum), GFP_KERNEL);
1597 if (!levdatum)
1598 return -ENOMEM;
1599
1600 rc = next_entry(buf, fp, sizeof buf);
1601 if (rc)
1602 goto bad;
1603
1604 len = le32_to_cpu(buf[0]);
1605 levdatum->isalias = le32_to_cpu(buf[1]);
1606
1607 rc = str_read(&key, GFP_KERNEL, fp, len);
1608 if (rc)
1609 goto bad;
1610
1611 rc = -ENOMEM;
1612 levdatum->level = kmalloc(sizeof(*levdatum->level), GFP_KERNEL);
1613 if (!levdatum->level)
1614 goto bad;
1615
1616 rc = mls_read_level(levdatum->level, fp);
1617 if (rc)
1618 goto bad;
1619
1620 rc = symtab_insert(s, key, levdatum);
1621 if (rc)
1622 goto bad;
1623 return 0;
1624 bad:
1625 sens_destroy(key, levdatum, NULL);
1626 return rc;
1627 }
1628
cat_read(struct policydb * p,struct symtab * s,void * fp)1629 static int cat_read(struct policydb *p, struct symtab *s, void *fp)
1630 {
1631 char *key = NULL;
1632 struct cat_datum *catdatum;
1633 int rc;
1634 __le32 buf[3];
1635 u32 len;
1636
1637 catdatum = kzalloc(sizeof(*catdatum), GFP_KERNEL);
1638 if (!catdatum)
1639 return -ENOMEM;
1640
1641 rc = next_entry(buf, fp, sizeof buf);
1642 if (rc)
1643 goto bad;
1644
1645 len = le32_to_cpu(buf[0]);
1646 catdatum->value = le32_to_cpu(buf[1]);
1647 catdatum->isalias = le32_to_cpu(buf[2]);
1648
1649 rc = str_read(&key, GFP_KERNEL, fp, len);
1650 if (rc)
1651 goto bad;
1652
1653 rc = symtab_insert(s, key, catdatum);
1654 if (rc)
1655 goto bad;
1656 return 0;
1657 bad:
1658 cat_destroy(key, catdatum, NULL);
1659 return rc;
1660 }
1661
1662 static int (*const read_f[SYM_NUM]) (struct policydb *p,
1663 struct symtab *s, void *fp) = {
1664 common_read,
1665 class_read,
1666 role_read,
1667 type_read,
1668 user_read,
1669 cond_read_bool,
1670 sens_read,
1671 cat_read,
1672 };
1673
user_bounds_sanity_check(void * key,void * datum,void * datap)1674 static int user_bounds_sanity_check(void *key, void *datum, void *datap)
1675 {
1676 struct user_datum *upper, *user;
1677 struct policydb *p = datap;
1678 int depth = 0;
1679
1680 upper = user = datum;
1681 while (upper->bounds) {
1682 struct ebitmap_node *node;
1683 u32 bit;
1684
1685 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1686 pr_err("SELinux: user %s: "
1687 "too deep or looped boundary\n",
1688 (char *) key);
1689 return -EINVAL;
1690 }
1691
1692 upper = p->user_val_to_struct[upper->bounds - 1];
1693 ebitmap_for_each_positive_bit(&user->roles, node, bit) {
1694 if (ebitmap_get_bit(&upper->roles, bit))
1695 continue;
1696
1697 pr_err("SELinux: boundary violated policy: "
1698 "user=%s role=%s bounds=%s\n",
1699 sym_name(p, SYM_USERS, user->value - 1),
1700 sym_name(p, SYM_ROLES, bit),
1701 sym_name(p, SYM_USERS, upper->value - 1));
1702
1703 return -EINVAL;
1704 }
1705 }
1706
1707 return 0;
1708 }
1709
role_bounds_sanity_check(void * key,void * datum,void * datap)1710 static int role_bounds_sanity_check(void *key, void *datum, void *datap)
1711 {
1712 struct role_datum *upper, *role;
1713 struct policydb *p = datap;
1714 int depth = 0;
1715
1716 upper = role = datum;
1717 while (upper->bounds) {
1718 struct ebitmap_node *node;
1719 u32 bit;
1720
1721 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1722 pr_err("SELinux: role %s: "
1723 "too deep or looped bounds\n",
1724 (char *) key);
1725 return -EINVAL;
1726 }
1727
1728 upper = p->role_val_to_struct[upper->bounds - 1];
1729 ebitmap_for_each_positive_bit(&role->types, node, bit) {
1730 if (ebitmap_get_bit(&upper->types, bit))
1731 continue;
1732
1733 pr_err("SELinux: boundary violated policy: "
1734 "role=%s type=%s bounds=%s\n",
1735 sym_name(p, SYM_ROLES, role->value - 1),
1736 sym_name(p, SYM_TYPES, bit),
1737 sym_name(p, SYM_ROLES, upper->value - 1));
1738
1739 return -EINVAL;
1740 }
1741 }
1742
1743 return 0;
1744 }
1745
type_bounds_sanity_check(void * key,void * datum,void * datap)1746 static int type_bounds_sanity_check(void *key, void *datum, void *datap)
1747 {
1748 struct type_datum *upper;
1749 struct policydb *p = datap;
1750 int depth = 0;
1751
1752 upper = datum;
1753 while (upper->bounds) {
1754 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1755 pr_err("SELinux: type %s: "
1756 "too deep or looped boundary\n",
1757 (char *) key);
1758 return -EINVAL;
1759 }
1760
1761 upper = p->type_val_to_struct[upper->bounds - 1];
1762 BUG_ON(!upper);
1763
1764 if (upper->attribute) {
1765 pr_err("SELinux: type %s: "
1766 "bounded by attribute %s\n",
1767 (char *) key,
1768 sym_name(p, SYM_TYPES, upper->value - 1));
1769 return -EINVAL;
1770 }
1771 }
1772
1773 return 0;
1774 }
1775
policydb_bounds_sanity_check(struct policydb * p)1776 static int policydb_bounds_sanity_check(struct policydb *p)
1777 {
1778 int rc;
1779
1780 if (p->policyvers < POLICYDB_VERSION_BOUNDARY)
1781 return 0;
1782
1783 rc = hashtab_map(&p->p_users.table, user_bounds_sanity_check, p);
1784 if (rc)
1785 return rc;
1786
1787 rc = hashtab_map(&p->p_roles.table, role_bounds_sanity_check, p);
1788 if (rc)
1789 return rc;
1790
1791 rc = hashtab_map(&p->p_types.table, type_bounds_sanity_check, p);
1792 if (rc)
1793 return rc;
1794
1795 return 0;
1796 }
1797
string_to_security_class(struct policydb * p,const char * name)1798 u16 string_to_security_class(struct policydb *p, const char *name)
1799 {
1800 struct class_datum *cladatum;
1801
1802 cladatum = symtab_search(&p->p_classes, name);
1803 if (!cladatum)
1804 return 0;
1805
1806 return cladatum->value;
1807 }
1808
string_to_av_perm(struct policydb * p,u16 tclass,const char * name)1809 u32 string_to_av_perm(struct policydb *p, u16 tclass, const char *name)
1810 {
1811 struct class_datum *cladatum;
1812 struct perm_datum *perdatum = NULL;
1813 struct common_datum *comdatum;
1814
1815 if (!tclass || tclass > p->p_classes.nprim)
1816 return 0;
1817
1818 cladatum = p->class_val_to_struct[tclass-1];
1819 comdatum = cladatum->comdatum;
1820 if (comdatum)
1821 perdatum = symtab_search(&comdatum->permissions, name);
1822 if (!perdatum)
1823 perdatum = symtab_search(&cladatum->permissions, name);
1824 if (!perdatum)
1825 return 0;
1826
1827 return 1U << (perdatum->value-1);
1828 }
1829
range_read(struct policydb * p,void * fp)1830 static int range_read(struct policydb *p, void *fp)
1831 {
1832 struct range_trans *rt = NULL;
1833 struct mls_range *r = NULL;
1834 int rc;
1835 __le32 buf[2];
1836 u32 i, nel;
1837
1838 if (p->policyvers < POLICYDB_VERSION_MLS)
1839 return 0;
1840
1841 rc = next_entry(buf, fp, sizeof(u32));
1842 if (rc)
1843 return rc;
1844
1845 nel = le32_to_cpu(buf[0]);
1846
1847 rc = hashtab_init(&p->range_tr, nel);
1848 if (rc)
1849 return rc;
1850
1851 for (i = 0; i < nel; i++) {
1852 rc = -ENOMEM;
1853 rt = kzalloc(sizeof(*rt), GFP_KERNEL);
1854 if (!rt)
1855 goto out;
1856
1857 rc = next_entry(buf, fp, (sizeof(u32) * 2));
1858 if (rc)
1859 goto out;
1860
1861 rt->source_type = le32_to_cpu(buf[0]);
1862 rt->target_type = le32_to_cpu(buf[1]);
1863 if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) {
1864 rc = next_entry(buf, fp, sizeof(u32));
1865 if (rc)
1866 goto out;
1867 rt->target_class = le32_to_cpu(buf[0]);
1868 } else
1869 rt->target_class = p->process_class;
1870
1871 rc = -EINVAL;
1872 if (!policydb_type_isvalid(p, rt->source_type) ||
1873 !policydb_type_isvalid(p, rt->target_type) ||
1874 !policydb_class_isvalid(p, rt->target_class))
1875 goto out;
1876
1877 rc = -ENOMEM;
1878 r = kzalloc(sizeof(*r), GFP_KERNEL);
1879 if (!r)
1880 goto out;
1881
1882 rc = mls_read_range_helper(r, fp);
1883 if (rc)
1884 goto out;
1885
1886 rc = -EINVAL;
1887 if (!mls_range_isvalid(p, r)) {
1888 pr_warn("SELinux: rangetrans: invalid range\n");
1889 goto out;
1890 }
1891
1892 rc = hashtab_insert(&p->range_tr, rt, r, rangetr_key_params);
1893 if (rc)
1894 goto out;
1895
1896 rt = NULL;
1897 r = NULL;
1898 }
1899 hash_eval(&p->range_tr, "rangetr");
1900 rc = 0;
1901 out:
1902 kfree(rt);
1903 kfree(r);
1904 return rc;
1905 }
1906
filename_trans_read_helper_compat(struct policydb * p,void * fp)1907 static int filename_trans_read_helper_compat(struct policydb *p, void *fp)
1908 {
1909 struct filename_trans_key key, *ft = NULL;
1910 struct filename_trans_datum *last, *datum = NULL;
1911 char *name = NULL;
1912 u32 len, stype, otype;
1913 __le32 buf[4];
1914 int rc;
1915
1916 /* length of the path component string */
1917 rc = next_entry(buf, fp, sizeof(u32));
1918 if (rc)
1919 return rc;
1920 len = le32_to_cpu(buf[0]);
1921
1922 /* path component string */
1923 rc = str_read(&name, GFP_KERNEL, fp, len);
1924 if (rc)
1925 return rc;
1926
1927 rc = next_entry(buf, fp, sizeof(u32) * 4);
1928 if (rc)
1929 goto out;
1930
1931 stype = le32_to_cpu(buf[0]);
1932 key.ttype = le32_to_cpu(buf[1]);
1933 key.tclass = le32_to_cpu(buf[2]);
1934 key.name = name;
1935
1936 otype = le32_to_cpu(buf[3]);
1937
1938 last = NULL;
1939 datum = policydb_filenametr_search(p, &key);
1940 while (datum) {
1941 if (unlikely(ebitmap_get_bit(&datum->stypes, stype - 1))) {
1942 /* conflicting/duplicate rules are ignored */
1943 datum = NULL;
1944 goto out;
1945 }
1946 if (likely(datum->otype == otype))
1947 break;
1948 last = datum;
1949 datum = datum->next;
1950 }
1951 if (!datum) {
1952 rc = -ENOMEM;
1953 datum = kmalloc(sizeof(*datum), GFP_KERNEL);
1954 if (!datum)
1955 goto out;
1956
1957 ebitmap_init(&datum->stypes);
1958 datum->otype = otype;
1959 datum->next = NULL;
1960
1961 if (unlikely(last)) {
1962 last->next = datum;
1963 } else {
1964 rc = -ENOMEM;
1965 ft = kmemdup(&key, sizeof(key), GFP_KERNEL);
1966 if (!ft)
1967 goto out;
1968
1969 rc = hashtab_insert(&p->filename_trans, ft, datum,
1970 filenametr_key_params);
1971 if (rc)
1972 goto out;
1973 name = NULL;
1974
1975 rc = ebitmap_set_bit(&p->filename_trans_ttypes,
1976 key.ttype, 1);
1977 if (rc)
1978 return rc;
1979 }
1980 }
1981 kfree(name);
1982 return ebitmap_set_bit(&datum->stypes, stype - 1, 1);
1983
1984 out:
1985 kfree(ft);
1986 kfree(name);
1987 kfree(datum);
1988 return rc;
1989 }
1990
filename_trans_read_helper(struct policydb * p,void * fp)1991 static int filename_trans_read_helper(struct policydb *p, void *fp)
1992 {
1993 struct filename_trans_key *ft = NULL;
1994 struct filename_trans_datum **dst, *datum, *first = NULL;
1995 char *name = NULL;
1996 u32 len, ttype, tclass, ndatum, i;
1997 __le32 buf[3];
1998 int rc;
1999
2000 /* length of the path component string */
2001 rc = next_entry(buf, fp, sizeof(u32));
2002 if (rc)
2003 return rc;
2004 len = le32_to_cpu(buf[0]);
2005
2006 /* path component string */
2007 rc = str_read(&name, GFP_KERNEL, fp, len);
2008 if (rc)
2009 return rc;
2010
2011 rc = next_entry(buf, fp, sizeof(u32) * 3);
2012 if (rc)
2013 goto out;
2014
2015 ttype = le32_to_cpu(buf[0]);
2016 tclass = le32_to_cpu(buf[1]);
2017
2018 ndatum = le32_to_cpu(buf[2]);
2019 if (ndatum == 0) {
2020 pr_err("SELinux: Filename transition key with no datum\n");
2021 rc = -ENOENT;
2022 goto out;
2023 }
2024
2025 dst = &first;
2026 for (i = 0; i < ndatum; i++) {
2027 rc = -ENOMEM;
2028 datum = kmalloc(sizeof(*datum), GFP_KERNEL);
2029 if (!datum)
2030 goto out;
2031
2032 datum->next = NULL;
2033 *dst = datum;
2034
2035 /* ebitmap_read() will at least init the bitmap */
2036 rc = ebitmap_read(&datum->stypes, fp);
2037 if (rc)
2038 goto out;
2039
2040 rc = next_entry(buf, fp, sizeof(u32));
2041 if (rc)
2042 goto out;
2043
2044 datum->otype = le32_to_cpu(buf[0]);
2045
2046 dst = &datum->next;
2047 }
2048
2049 rc = -ENOMEM;
2050 ft = kmalloc(sizeof(*ft), GFP_KERNEL);
2051 if (!ft)
2052 goto out;
2053
2054 ft->ttype = ttype;
2055 ft->tclass = tclass;
2056 ft->name = name;
2057
2058 rc = hashtab_insert(&p->filename_trans, ft, first,
2059 filenametr_key_params);
2060 if (rc == -EEXIST)
2061 pr_err("SELinux: Duplicate filename transition key\n");
2062 if (rc)
2063 goto out;
2064
2065 return ebitmap_set_bit(&p->filename_trans_ttypes, ttype, 1);
2066
2067 out:
2068 kfree(ft);
2069 kfree(name);
2070 while (first) {
2071 datum = first;
2072 first = first->next;
2073
2074 ebitmap_destroy(&datum->stypes);
2075 kfree(datum);
2076 }
2077 return rc;
2078 }
2079
filename_trans_read(struct policydb * p,void * fp)2080 static int filename_trans_read(struct policydb *p, void *fp)
2081 {
2082 u32 nel, i;
2083 __le32 buf[1];
2084 int rc;
2085
2086 if (p->policyvers < POLICYDB_VERSION_FILENAME_TRANS)
2087 return 0;
2088
2089 rc = next_entry(buf, fp, sizeof(u32));
2090 if (rc)
2091 return rc;
2092 nel = le32_to_cpu(buf[0]);
2093
2094 if (p->policyvers < POLICYDB_VERSION_COMP_FTRANS) {
2095 p->compat_filename_trans_count = nel;
2096
2097 rc = hashtab_init(&p->filename_trans, (1 << 11));
2098 if (rc)
2099 return rc;
2100
2101 for (i = 0; i < nel; i++) {
2102 rc = filename_trans_read_helper_compat(p, fp);
2103 if (rc)
2104 return rc;
2105 }
2106 } else {
2107 rc = hashtab_init(&p->filename_trans, nel);
2108 if (rc)
2109 return rc;
2110
2111 for (i = 0; i < nel; i++) {
2112 rc = filename_trans_read_helper(p, fp);
2113 if (rc)
2114 return rc;
2115 }
2116 }
2117 hash_eval(&p->filename_trans, "filenametr");
2118 return 0;
2119 }
2120
genfs_read(struct policydb * p,void * fp)2121 static int genfs_read(struct policydb *p, void *fp)
2122 {
2123 int rc;
2124 u32 i, j, nel, nel2, len, len2;
2125 __le32 buf[1];
2126 struct ocontext *l, *c;
2127 struct ocontext *newc = NULL;
2128 struct genfs *genfs_p, *genfs;
2129 struct genfs *newgenfs = NULL;
2130
2131 rc = next_entry(buf, fp, sizeof(u32));
2132 if (rc)
2133 return rc;
2134 nel = le32_to_cpu(buf[0]);
2135
2136 for (i = 0; i < nel; i++) {
2137 rc = next_entry(buf, fp, sizeof(u32));
2138 if (rc)
2139 goto out;
2140 len = le32_to_cpu(buf[0]);
2141
2142 rc = -ENOMEM;
2143 newgenfs = kzalloc(sizeof(*newgenfs), GFP_KERNEL);
2144 if (!newgenfs)
2145 goto out;
2146
2147 rc = str_read(&newgenfs->fstype, GFP_KERNEL, fp, len);
2148 if (rc)
2149 goto out;
2150
2151 for (genfs_p = NULL, genfs = p->genfs; genfs;
2152 genfs_p = genfs, genfs = genfs->next) {
2153 rc = -EINVAL;
2154 if (strcmp(newgenfs->fstype, genfs->fstype) == 0) {
2155 pr_err("SELinux: dup genfs fstype %s\n",
2156 newgenfs->fstype);
2157 goto out;
2158 }
2159 if (strcmp(newgenfs->fstype, genfs->fstype) < 0)
2160 break;
2161 }
2162 newgenfs->next = genfs;
2163 if (genfs_p)
2164 genfs_p->next = newgenfs;
2165 else
2166 p->genfs = newgenfs;
2167 genfs = newgenfs;
2168 newgenfs = NULL;
2169
2170 rc = next_entry(buf, fp, sizeof(u32));
2171 if (rc)
2172 goto out;
2173
2174 nel2 = le32_to_cpu(buf[0]);
2175 for (j = 0; j < nel2; j++) {
2176 rc = next_entry(buf, fp, sizeof(u32));
2177 if (rc)
2178 goto out;
2179 len = le32_to_cpu(buf[0]);
2180
2181 rc = -ENOMEM;
2182 newc = kzalloc(sizeof(*newc), GFP_KERNEL);
2183 if (!newc)
2184 goto out;
2185
2186 rc = str_read(&newc->u.name, GFP_KERNEL, fp, len);
2187 if (rc)
2188 goto out;
2189
2190 rc = next_entry(buf, fp, sizeof(u32));
2191 if (rc)
2192 goto out;
2193
2194 newc->v.sclass = le32_to_cpu(buf[0]);
2195 rc = context_read_and_validate(&newc->context[0], p, fp);
2196 if (rc)
2197 goto out;
2198
2199 for (l = NULL, c = genfs->head; c;
2200 l = c, c = c->next) {
2201 rc = -EINVAL;
2202 if (!strcmp(newc->u.name, c->u.name) &&
2203 (!c->v.sclass || !newc->v.sclass ||
2204 newc->v.sclass == c->v.sclass)) {
2205 pr_err("SELinux: dup genfs entry (%s,%s)\n",
2206 genfs->fstype, c->u.name);
2207 goto out;
2208 }
2209 len = strlen(newc->u.name);
2210 len2 = strlen(c->u.name);
2211 if (len > len2)
2212 break;
2213 }
2214
2215 newc->next = c;
2216 if (l)
2217 l->next = newc;
2218 else
2219 genfs->head = newc;
2220 newc = NULL;
2221 }
2222 }
2223 rc = 0;
2224 out:
2225 if (newgenfs) {
2226 kfree(newgenfs->fstype);
2227 kfree(newgenfs);
2228 }
2229 ocontext_destroy(newc, OCON_FSUSE);
2230
2231 return rc;
2232 }
2233
ocontext_read(struct policydb * p,const struct policydb_compat_info * info,void * fp)2234 static int ocontext_read(struct policydb *p, const struct policydb_compat_info *info,
2235 void *fp)
2236 {
2237 int rc;
2238 unsigned int i;
2239 u32 j, nel, len;
2240 __be64 prefixbuf[1];
2241 __le32 buf[3];
2242 struct ocontext *l, *c;
2243 u32 nodebuf[8];
2244
2245 for (i = 0; i < info->ocon_num; i++) {
2246 rc = next_entry(buf, fp, sizeof(u32));
2247 if (rc)
2248 goto out;
2249 nel = le32_to_cpu(buf[0]);
2250
2251 l = NULL;
2252 for (j = 0; j < nel; j++) {
2253 rc = -ENOMEM;
2254 c = kzalloc(sizeof(*c), GFP_KERNEL);
2255 if (!c)
2256 goto out;
2257 if (l)
2258 l->next = c;
2259 else
2260 p->ocontexts[i] = c;
2261 l = c;
2262
2263 switch (i) {
2264 case OCON_ISID:
2265 rc = next_entry(buf, fp, sizeof(u32));
2266 if (rc)
2267 goto out;
2268
2269 c->sid[0] = le32_to_cpu(buf[0]);
2270 rc = context_read_and_validate(&c->context[0], p, fp);
2271 if (rc)
2272 goto out;
2273 break;
2274 case OCON_FS:
2275 case OCON_NETIF:
2276 rc = next_entry(buf, fp, sizeof(u32));
2277 if (rc)
2278 goto out;
2279 len = le32_to_cpu(buf[0]);
2280
2281 rc = str_read(&c->u.name, GFP_KERNEL, fp, len);
2282 if (rc)
2283 goto out;
2284
2285 if (i == OCON_FS)
2286 pr_warn("SELinux: void and deprecated fs ocon %s\n",
2287 c->u.name);
2288
2289 rc = context_read_and_validate(&c->context[0], p, fp);
2290 if (rc)
2291 goto out;
2292 rc = context_read_and_validate(&c->context[1], p, fp);
2293 if (rc)
2294 goto out;
2295 break;
2296 case OCON_PORT:
2297 rc = next_entry(buf, fp, sizeof(u32)*3);
2298 if (rc)
2299 goto out;
2300 c->u.port.protocol = le32_to_cpu(buf[0]);
2301 c->u.port.low_port = le32_to_cpu(buf[1]);
2302 c->u.port.high_port = le32_to_cpu(buf[2]);
2303 rc = context_read_and_validate(&c->context[0], p, fp);
2304 if (rc)
2305 goto out;
2306 break;
2307 case OCON_NODE:
2308 rc = next_entry(nodebuf, fp, sizeof(u32) * 2);
2309 if (rc)
2310 goto out;
2311 c->u.node.addr = nodebuf[0]; /* network order */
2312 c->u.node.mask = nodebuf[1]; /* network order */
2313 rc = context_read_and_validate(&c->context[0], p, fp);
2314 if (rc)
2315 goto out;
2316 break;
2317 case OCON_FSUSE:
2318 rc = next_entry(buf, fp, sizeof(u32)*2);
2319 if (rc)
2320 goto out;
2321
2322 rc = -EINVAL;
2323 c->v.behavior = le32_to_cpu(buf[0]);
2324 /* Determined at runtime, not in policy DB. */
2325 if (c->v.behavior == SECURITY_FS_USE_MNTPOINT)
2326 goto out;
2327 if (c->v.behavior > SECURITY_FS_USE_MAX)
2328 goto out;
2329
2330 len = le32_to_cpu(buf[1]);
2331 rc = str_read(&c->u.name, GFP_KERNEL, fp, len);
2332 if (rc)
2333 goto out;
2334
2335 rc = context_read_and_validate(&c->context[0], p, fp);
2336 if (rc)
2337 goto out;
2338 break;
2339 case OCON_NODE6: {
2340 int k;
2341
2342 rc = next_entry(nodebuf, fp, sizeof(u32) * 8);
2343 if (rc)
2344 goto out;
2345 for (k = 0; k < 4; k++)
2346 c->u.node6.addr[k] = nodebuf[k];
2347 for (k = 0; k < 4; k++)
2348 c->u.node6.mask[k] = nodebuf[k+4];
2349 rc = context_read_and_validate(&c->context[0], p, fp);
2350 if (rc)
2351 goto out;
2352 break;
2353 }
2354 case OCON_IBPKEY: {
2355 u32 pkey_lo, pkey_hi;
2356
2357 rc = next_entry(prefixbuf, fp, sizeof(u64));
2358 if (rc)
2359 goto out;
2360
2361 /* we need to have subnet_prefix in CPU order */
2362 c->u.ibpkey.subnet_prefix = be64_to_cpu(prefixbuf[0]);
2363
2364 rc = next_entry(buf, fp, sizeof(u32) * 2);
2365 if (rc)
2366 goto out;
2367
2368 pkey_lo = le32_to_cpu(buf[0]);
2369 pkey_hi = le32_to_cpu(buf[1]);
2370
2371 if (pkey_lo > U16_MAX || pkey_hi > U16_MAX) {
2372 rc = -EINVAL;
2373 goto out;
2374 }
2375
2376 c->u.ibpkey.low_pkey = pkey_lo;
2377 c->u.ibpkey.high_pkey = pkey_hi;
2378
2379 rc = context_read_and_validate(&c->context[0],
2380 p,
2381 fp);
2382 if (rc)
2383 goto out;
2384 break;
2385 }
2386 case OCON_IBENDPORT: {
2387 u32 port;
2388
2389 rc = next_entry(buf, fp, sizeof(u32) * 2);
2390 if (rc)
2391 goto out;
2392 len = le32_to_cpu(buf[0]);
2393
2394 rc = str_read(&c->u.ibendport.dev_name, GFP_KERNEL, fp, len);
2395 if (rc)
2396 goto out;
2397
2398 port = le32_to_cpu(buf[1]);
2399 if (port > U8_MAX || port == 0) {
2400 rc = -EINVAL;
2401 goto out;
2402 }
2403
2404 c->u.ibendport.port = port;
2405
2406 rc = context_read_and_validate(&c->context[0],
2407 p,
2408 fp);
2409 if (rc)
2410 goto out;
2411 break;
2412 } /* end case */
2413 } /* end switch */
2414 }
2415 }
2416 rc = 0;
2417 out:
2418 return rc;
2419 }
2420
2421 /*
2422 * Read the configuration data from a policy database binary
2423 * representation file into a policy database structure.
2424 */
policydb_read(struct policydb * p,void * fp)2425 int policydb_read(struct policydb *p, void *fp)
2426 {
2427 struct role_allow *ra, *lra;
2428 struct role_trans_key *rtk = NULL;
2429 struct role_trans_datum *rtd = NULL;
2430 int rc;
2431 __le32 buf[4];
2432 u32 i, j, len, nprim, nel, perm;
2433
2434 char *policydb_str;
2435 const struct policydb_compat_info *info;
2436
2437 policydb_init(p);
2438
2439 /* Read the magic number and string length. */
2440 rc = next_entry(buf, fp, sizeof(u32) * 2);
2441 if (rc)
2442 goto bad;
2443
2444 rc = -EINVAL;
2445 if (le32_to_cpu(buf[0]) != POLICYDB_MAGIC) {
2446 pr_err("SELinux: policydb magic number 0x%x does "
2447 "not match expected magic number 0x%x\n",
2448 le32_to_cpu(buf[0]), POLICYDB_MAGIC);
2449 goto bad;
2450 }
2451
2452 rc = -EINVAL;
2453 len = le32_to_cpu(buf[1]);
2454 if (len != strlen(POLICYDB_STRING)) {
2455 pr_err("SELinux: policydb string length %d does not "
2456 "match expected length %zu\n",
2457 len, strlen(POLICYDB_STRING));
2458 goto bad;
2459 }
2460
2461 rc = -ENOMEM;
2462 policydb_str = kmalloc(len + 1, GFP_KERNEL);
2463 if (!policydb_str) {
2464 pr_err("SELinux: unable to allocate memory for policydb "
2465 "string of length %d\n", len);
2466 goto bad;
2467 }
2468
2469 rc = next_entry(policydb_str, fp, len);
2470 if (rc) {
2471 pr_err("SELinux: truncated policydb string identifier\n");
2472 kfree(policydb_str);
2473 goto bad;
2474 }
2475
2476 rc = -EINVAL;
2477 policydb_str[len] = '\0';
2478 if (strcmp(policydb_str, POLICYDB_STRING)) {
2479 pr_err("SELinux: policydb string %s does not match "
2480 "my string %s\n", policydb_str, POLICYDB_STRING);
2481 kfree(policydb_str);
2482 goto bad;
2483 }
2484 /* Done with policydb_str. */
2485 kfree(policydb_str);
2486 policydb_str = NULL;
2487
2488 /* Read the version and table sizes. */
2489 rc = next_entry(buf, fp, sizeof(u32)*4);
2490 if (rc)
2491 goto bad;
2492
2493 rc = -EINVAL;
2494 p->policyvers = le32_to_cpu(buf[0]);
2495 if (p->policyvers < POLICYDB_VERSION_MIN ||
2496 p->policyvers > POLICYDB_VERSION_MAX) {
2497 pr_err("SELinux: policydb version %d does not match "
2498 "my version range %d-%d\n",
2499 le32_to_cpu(buf[0]), POLICYDB_VERSION_MIN, POLICYDB_VERSION_MAX);
2500 goto bad;
2501 }
2502
2503 if ((le32_to_cpu(buf[1]) & POLICYDB_CONFIG_MLS)) {
2504 p->mls_enabled = 1;
2505
2506 rc = -EINVAL;
2507 if (p->policyvers < POLICYDB_VERSION_MLS) {
2508 pr_err("SELinux: security policydb version %d "
2509 "(MLS) not backwards compatible\n",
2510 p->policyvers);
2511 goto bad;
2512 }
2513 }
2514 p->reject_unknown = !!(le32_to_cpu(buf[1]) & REJECT_UNKNOWN);
2515 p->allow_unknown = !!(le32_to_cpu(buf[1]) & ALLOW_UNKNOWN);
2516
2517 if (p->policyvers >= POLICYDB_VERSION_POLCAP) {
2518 rc = ebitmap_read(&p->policycaps, fp);
2519 if (rc)
2520 goto bad;
2521 }
2522
2523 if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE) {
2524 rc = ebitmap_read(&p->permissive_map, fp);
2525 if (rc)
2526 goto bad;
2527 }
2528
2529 rc = -EINVAL;
2530 info = policydb_lookup_compat(p->policyvers);
2531 if (!info) {
2532 pr_err("SELinux: unable to find policy compat info "
2533 "for version %d\n", p->policyvers);
2534 goto bad;
2535 }
2536
2537 rc = -EINVAL;
2538 if (le32_to_cpu(buf[2]) != info->sym_num ||
2539 le32_to_cpu(buf[3]) != info->ocon_num) {
2540 pr_err("SELinux: policydb table sizes (%d,%d) do "
2541 "not match mine (%d,%d)\n", le32_to_cpu(buf[2]),
2542 le32_to_cpu(buf[3]),
2543 info->sym_num, info->ocon_num);
2544 goto bad;
2545 }
2546
2547 for (i = 0; i < info->sym_num; i++) {
2548 rc = next_entry(buf, fp, sizeof(u32)*2);
2549 if (rc)
2550 goto bad;
2551 nprim = le32_to_cpu(buf[0]);
2552 nel = le32_to_cpu(buf[1]);
2553
2554 rc = symtab_init(&p->symtab[i], nel);
2555 if (rc)
2556 goto out;
2557
2558 if (i == SYM_ROLES) {
2559 rc = roles_init(p);
2560 if (rc)
2561 goto out;
2562 }
2563
2564 for (j = 0; j < nel; j++) {
2565 rc = read_f[i](p, &p->symtab[i], fp);
2566 if (rc)
2567 goto bad;
2568 }
2569
2570 p->symtab[i].nprim = nprim;
2571 }
2572
2573 rc = -EINVAL;
2574 p->process_class = string_to_security_class(p, "process");
2575 if (!p->process_class) {
2576 pr_err("SELinux: process class is required, not defined in policy\n");
2577 goto bad;
2578 }
2579
2580 rc = avtab_read(&p->te_avtab, fp, p);
2581 if (rc)
2582 goto bad;
2583
2584 if (p->policyvers >= POLICYDB_VERSION_BOOL) {
2585 rc = cond_read_list(p, fp);
2586 if (rc)
2587 goto bad;
2588 }
2589
2590 rc = next_entry(buf, fp, sizeof(u32));
2591 if (rc)
2592 goto bad;
2593 nel = le32_to_cpu(buf[0]);
2594
2595 rc = hashtab_init(&p->role_tr, nel);
2596 if (rc)
2597 goto bad;
2598 for (i = 0; i < nel; i++) {
2599 rc = -ENOMEM;
2600 rtk = kmalloc(sizeof(*rtk), GFP_KERNEL);
2601 if (!rtk)
2602 goto bad;
2603
2604 rc = -ENOMEM;
2605 rtd = kmalloc(sizeof(*rtd), GFP_KERNEL);
2606 if (!rtd)
2607 goto bad;
2608
2609 rc = next_entry(buf, fp, sizeof(u32)*3);
2610 if (rc)
2611 goto bad;
2612
2613 rtk->role = le32_to_cpu(buf[0]);
2614 rtk->type = le32_to_cpu(buf[1]);
2615 rtd->new_role = le32_to_cpu(buf[2]);
2616 if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) {
2617 rc = next_entry(buf, fp, sizeof(u32));
2618 if (rc)
2619 goto bad;
2620 rtk->tclass = le32_to_cpu(buf[0]);
2621 } else
2622 rtk->tclass = p->process_class;
2623
2624 rc = -EINVAL;
2625 if (!policydb_role_isvalid(p, rtk->role) ||
2626 !policydb_type_isvalid(p, rtk->type) ||
2627 !policydb_class_isvalid(p, rtk->tclass) ||
2628 !policydb_role_isvalid(p, rtd->new_role))
2629 goto bad;
2630
2631 rc = hashtab_insert(&p->role_tr, rtk, rtd, roletr_key_params);
2632 if (rc)
2633 goto bad;
2634
2635 rtk = NULL;
2636 rtd = NULL;
2637 }
2638
2639 rc = next_entry(buf, fp, sizeof(u32));
2640 if (rc)
2641 goto bad;
2642 nel = le32_to_cpu(buf[0]);
2643 lra = NULL;
2644 for (i = 0; i < nel; i++) {
2645 rc = -ENOMEM;
2646 ra = kzalloc(sizeof(*ra), GFP_KERNEL);
2647 if (!ra)
2648 goto bad;
2649 if (lra)
2650 lra->next = ra;
2651 else
2652 p->role_allow = ra;
2653 rc = next_entry(buf, fp, sizeof(u32)*2);
2654 if (rc)
2655 goto bad;
2656
2657 rc = -EINVAL;
2658 ra->role = le32_to_cpu(buf[0]);
2659 ra->new_role = le32_to_cpu(buf[1]);
2660 if (!policydb_role_isvalid(p, ra->role) ||
2661 !policydb_role_isvalid(p, ra->new_role))
2662 goto bad;
2663 lra = ra;
2664 }
2665
2666 rc = filename_trans_read(p, fp);
2667 if (rc)
2668 goto bad;
2669
2670 rc = policydb_index(p);
2671 if (rc)
2672 goto bad;
2673
2674 rc = -EINVAL;
2675 perm = string_to_av_perm(p, p->process_class, "transition");
2676 if (!perm) {
2677 pr_err("SELinux: process transition permission is required, not defined in policy\n");
2678 goto bad;
2679 }
2680 p->process_trans_perms = perm;
2681 perm = string_to_av_perm(p, p->process_class, "dyntransition");
2682 if (!perm) {
2683 pr_err("SELinux: process dyntransition permission is required, not defined in policy\n");
2684 goto bad;
2685 }
2686 p->process_trans_perms |= perm;
2687
2688 rc = ocontext_read(p, info, fp);
2689 if (rc)
2690 goto bad;
2691
2692 rc = genfs_read(p, fp);
2693 if (rc)
2694 goto bad;
2695
2696 rc = range_read(p, fp);
2697 if (rc)
2698 goto bad;
2699
2700 rc = -ENOMEM;
2701 p->type_attr_map_array = kvcalloc(p->p_types.nprim,
2702 sizeof(*p->type_attr_map_array),
2703 GFP_KERNEL);
2704 if (!p->type_attr_map_array)
2705 goto bad;
2706
2707 /* just in case ebitmap_init() becomes more than just a memset(0): */
2708 for (i = 0; i < p->p_types.nprim; i++)
2709 ebitmap_init(&p->type_attr_map_array[i]);
2710
2711 for (i = 0; i < p->p_types.nprim; i++) {
2712 struct ebitmap *e = &p->type_attr_map_array[i];
2713
2714 if (p->policyvers >= POLICYDB_VERSION_AVTAB) {
2715 rc = ebitmap_read(e, fp);
2716 if (rc)
2717 goto bad;
2718 }
2719 /* add the type itself as the degenerate case */
2720 rc = ebitmap_set_bit(e, i, 1);
2721 if (rc)
2722 goto bad;
2723 }
2724
2725 rc = policydb_bounds_sanity_check(p);
2726 if (rc)
2727 goto bad;
2728
2729 rc = 0;
2730 out:
2731 return rc;
2732 bad:
2733 kfree(rtk);
2734 kfree(rtd);
2735 policydb_destroy(p);
2736 goto out;
2737 }
2738
2739 /*
2740 * Write a MLS level structure to a policydb binary
2741 * representation file.
2742 */
mls_write_level(struct mls_level * l,void * fp)2743 static int mls_write_level(struct mls_level *l, void *fp)
2744 {
2745 __le32 buf[1];
2746 int rc;
2747
2748 buf[0] = cpu_to_le32(l->sens);
2749 rc = put_entry(buf, sizeof(u32), 1, fp);
2750 if (rc)
2751 return rc;
2752
2753 rc = ebitmap_write(&l->cat, fp);
2754 if (rc)
2755 return rc;
2756
2757 return 0;
2758 }
2759
2760 /*
2761 * Write a MLS range structure to a policydb binary
2762 * representation file.
2763 */
mls_write_range_helper(struct mls_range * r,void * fp)2764 static int mls_write_range_helper(struct mls_range *r, void *fp)
2765 {
2766 __le32 buf[3];
2767 size_t items;
2768 int rc, eq;
2769
2770 eq = mls_level_eq(&r->level[1], &r->level[0]);
2771
2772 if (eq)
2773 items = 2;
2774 else
2775 items = 3;
2776 buf[0] = cpu_to_le32(items-1);
2777 buf[1] = cpu_to_le32(r->level[0].sens);
2778 if (!eq)
2779 buf[2] = cpu_to_le32(r->level[1].sens);
2780
2781 BUG_ON(items > ARRAY_SIZE(buf));
2782
2783 rc = put_entry(buf, sizeof(u32), items, fp);
2784 if (rc)
2785 return rc;
2786
2787 rc = ebitmap_write(&r->level[0].cat, fp);
2788 if (rc)
2789 return rc;
2790 if (!eq) {
2791 rc = ebitmap_write(&r->level[1].cat, fp);
2792 if (rc)
2793 return rc;
2794 }
2795
2796 return 0;
2797 }
2798
sens_write(void * vkey,void * datum,void * ptr)2799 static int sens_write(void *vkey, void *datum, void *ptr)
2800 {
2801 char *key = vkey;
2802 struct level_datum *levdatum = datum;
2803 struct policy_data *pd = ptr;
2804 void *fp = pd->fp;
2805 __le32 buf[2];
2806 size_t len;
2807 int rc;
2808
2809 len = strlen(key);
2810 buf[0] = cpu_to_le32(len);
2811 buf[1] = cpu_to_le32(levdatum->isalias);
2812 rc = put_entry(buf, sizeof(u32), 2, fp);
2813 if (rc)
2814 return rc;
2815
2816 rc = put_entry(key, 1, len, fp);
2817 if (rc)
2818 return rc;
2819
2820 rc = mls_write_level(levdatum->level, fp);
2821 if (rc)
2822 return rc;
2823
2824 return 0;
2825 }
2826
cat_write(void * vkey,void * datum,void * ptr)2827 static int cat_write(void *vkey, void *datum, void *ptr)
2828 {
2829 char *key = vkey;
2830 struct cat_datum *catdatum = datum;
2831 struct policy_data *pd = ptr;
2832 void *fp = pd->fp;
2833 __le32 buf[3];
2834 size_t len;
2835 int rc;
2836
2837 len = strlen(key);
2838 buf[0] = cpu_to_le32(len);
2839 buf[1] = cpu_to_le32(catdatum->value);
2840 buf[2] = cpu_to_le32(catdatum->isalias);
2841 rc = put_entry(buf, sizeof(u32), 3, fp);
2842 if (rc)
2843 return rc;
2844
2845 rc = put_entry(key, 1, len, fp);
2846 if (rc)
2847 return rc;
2848
2849 return 0;
2850 }
2851
role_trans_write_one(void * key,void * datum,void * ptr)2852 static int role_trans_write_one(void *key, void *datum, void *ptr)
2853 {
2854 struct role_trans_key *rtk = key;
2855 struct role_trans_datum *rtd = datum;
2856 struct policy_data *pd = ptr;
2857 void *fp = pd->fp;
2858 struct policydb *p = pd->p;
2859 __le32 buf[3];
2860 int rc;
2861
2862 buf[0] = cpu_to_le32(rtk->role);
2863 buf[1] = cpu_to_le32(rtk->type);
2864 buf[2] = cpu_to_le32(rtd->new_role);
2865 rc = put_entry(buf, sizeof(u32), 3, fp);
2866 if (rc)
2867 return rc;
2868 if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) {
2869 buf[0] = cpu_to_le32(rtk->tclass);
2870 rc = put_entry(buf, sizeof(u32), 1, fp);
2871 if (rc)
2872 return rc;
2873 }
2874 return 0;
2875 }
2876
role_trans_write(struct policydb * p,void * fp)2877 static int role_trans_write(struct policydb *p, void *fp)
2878 {
2879 struct policy_data pd = { .p = p, .fp = fp };
2880 __le32 buf[1];
2881 int rc;
2882
2883 buf[0] = cpu_to_le32(p->role_tr.nel);
2884 rc = put_entry(buf, sizeof(u32), 1, fp);
2885 if (rc)
2886 return rc;
2887
2888 return hashtab_map(&p->role_tr, role_trans_write_one, &pd);
2889 }
2890
role_allow_write(struct role_allow * r,void * fp)2891 static int role_allow_write(struct role_allow *r, void *fp)
2892 {
2893 struct role_allow *ra;
2894 __le32 buf[2];
2895 size_t nel;
2896 int rc;
2897
2898 nel = 0;
2899 for (ra = r; ra; ra = ra->next)
2900 nel++;
2901 buf[0] = cpu_to_le32(nel);
2902 rc = put_entry(buf, sizeof(u32), 1, fp);
2903 if (rc)
2904 return rc;
2905 for (ra = r; ra; ra = ra->next) {
2906 buf[0] = cpu_to_le32(ra->role);
2907 buf[1] = cpu_to_le32(ra->new_role);
2908 rc = put_entry(buf, sizeof(u32), 2, fp);
2909 if (rc)
2910 return rc;
2911 }
2912 return 0;
2913 }
2914
2915 /*
2916 * Write a security context structure
2917 * to a policydb binary representation file.
2918 */
context_write(struct policydb * p,struct context * c,void * fp)2919 static int context_write(struct policydb *p, struct context *c,
2920 void *fp)
2921 {
2922 int rc;
2923 __le32 buf[3];
2924
2925 buf[0] = cpu_to_le32(c->user);
2926 buf[1] = cpu_to_le32(c->role);
2927 buf[2] = cpu_to_le32(c->type);
2928
2929 rc = put_entry(buf, sizeof(u32), 3, fp);
2930 if (rc)
2931 return rc;
2932
2933 rc = mls_write_range_helper(&c->range, fp);
2934 if (rc)
2935 return rc;
2936
2937 return 0;
2938 }
2939
2940 /*
2941 * The following *_write functions are used to
2942 * write the symbol data to a policy database
2943 * binary representation file.
2944 */
2945
perm_write(void * vkey,void * datum,void * fp)2946 static int perm_write(void *vkey, void *datum, void *fp)
2947 {
2948 char *key = vkey;
2949 struct perm_datum *perdatum = datum;
2950 __le32 buf[2];
2951 size_t len;
2952 int rc;
2953
2954 len = strlen(key);
2955 buf[0] = cpu_to_le32(len);
2956 buf[1] = cpu_to_le32(perdatum->value);
2957 rc = put_entry(buf, sizeof(u32), 2, fp);
2958 if (rc)
2959 return rc;
2960
2961 rc = put_entry(key, 1, len, fp);
2962 if (rc)
2963 return rc;
2964
2965 return 0;
2966 }
2967
common_write(void * vkey,void * datum,void * ptr)2968 static int common_write(void *vkey, void *datum, void *ptr)
2969 {
2970 char *key = vkey;
2971 struct common_datum *comdatum = datum;
2972 struct policy_data *pd = ptr;
2973 void *fp = pd->fp;
2974 __le32 buf[4];
2975 size_t len;
2976 int rc;
2977
2978 len = strlen(key);
2979 buf[0] = cpu_to_le32(len);
2980 buf[1] = cpu_to_le32(comdatum->value);
2981 buf[2] = cpu_to_le32(comdatum->permissions.nprim);
2982 buf[3] = cpu_to_le32(comdatum->permissions.table.nel);
2983 rc = put_entry(buf, sizeof(u32), 4, fp);
2984 if (rc)
2985 return rc;
2986
2987 rc = put_entry(key, 1, len, fp);
2988 if (rc)
2989 return rc;
2990
2991 rc = hashtab_map(&comdatum->permissions.table, perm_write, fp);
2992 if (rc)
2993 return rc;
2994
2995 return 0;
2996 }
2997
type_set_write(struct type_set * t,void * fp)2998 static int type_set_write(struct type_set *t, void *fp)
2999 {
3000 int rc;
3001 __le32 buf[1];
3002
3003 if (ebitmap_write(&t->types, fp))
3004 return -EINVAL;
3005 if (ebitmap_write(&t->negset, fp))
3006 return -EINVAL;
3007
3008 buf[0] = cpu_to_le32(t->flags);
3009 rc = put_entry(buf, sizeof(u32), 1, fp);
3010 if (rc)
3011 return -EINVAL;
3012
3013 return 0;
3014 }
3015
write_cons_helper(struct policydb * p,struct constraint_node * node,void * fp)3016 static int write_cons_helper(struct policydb *p, struct constraint_node *node,
3017 void *fp)
3018 {
3019 struct constraint_node *c;
3020 struct constraint_expr *e;
3021 __le32 buf[3];
3022 u32 nel;
3023 int rc;
3024
3025 for (c = node; c; c = c->next) {
3026 nel = 0;
3027 for (e = c->expr; e; e = e->next)
3028 nel++;
3029 buf[0] = cpu_to_le32(c->permissions);
3030 buf[1] = cpu_to_le32(nel);
3031 rc = put_entry(buf, sizeof(u32), 2, fp);
3032 if (rc)
3033 return rc;
3034 for (e = c->expr; e; e = e->next) {
3035 buf[0] = cpu_to_le32(e->expr_type);
3036 buf[1] = cpu_to_le32(e->attr);
3037 buf[2] = cpu_to_le32(e->op);
3038 rc = put_entry(buf, sizeof(u32), 3, fp);
3039 if (rc)
3040 return rc;
3041
3042 switch (e->expr_type) {
3043 case CEXPR_NAMES:
3044 rc = ebitmap_write(&e->names, fp);
3045 if (rc)
3046 return rc;
3047 if (p->policyvers >=
3048 POLICYDB_VERSION_CONSTRAINT_NAMES) {
3049 rc = type_set_write(e->type_names, fp);
3050 if (rc)
3051 return rc;
3052 }
3053 break;
3054 default:
3055 break;
3056 }
3057 }
3058 }
3059
3060 return 0;
3061 }
3062
class_write(void * vkey,void * datum,void * ptr)3063 static int class_write(void *vkey, void *datum, void *ptr)
3064 {
3065 char *key = vkey;
3066 struct class_datum *cladatum = datum;
3067 struct policy_data *pd = ptr;
3068 void *fp = pd->fp;
3069 struct policydb *p = pd->p;
3070 struct constraint_node *c;
3071 __le32 buf[6];
3072 u32 ncons;
3073 size_t len, len2;
3074 int rc;
3075
3076 len = strlen(key);
3077 if (cladatum->comkey)
3078 len2 = strlen(cladatum->comkey);
3079 else
3080 len2 = 0;
3081
3082 ncons = 0;
3083 for (c = cladatum->constraints; c; c = c->next)
3084 ncons++;
3085
3086 buf[0] = cpu_to_le32(len);
3087 buf[1] = cpu_to_le32(len2);
3088 buf[2] = cpu_to_le32(cladatum->value);
3089 buf[3] = cpu_to_le32(cladatum->permissions.nprim);
3090 buf[4] = cpu_to_le32(cladatum->permissions.table.nel);
3091 buf[5] = cpu_to_le32(ncons);
3092 rc = put_entry(buf, sizeof(u32), 6, fp);
3093 if (rc)
3094 return rc;
3095
3096 rc = put_entry(key, 1, len, fp);
3097 if (rc)
3098 return rc;
3099
3100 if (cladatum->comkey) {
3101 rc = put_entry(cladatum->comkey, 1, len2, fp);
3102 if (rc)
3103 return rc;
3104 }
3105
3106 rc = hashtab_map(&cladatum->permissions.table, perm_write, fp);
3107 if (rc)
3108 return rc;
3109
3110 rc = write_cons_helper(p, cladatum->constraints, fp);
3111 if (rc)
3112 return rc;
3113
3114 /* write out the validatetrans rule */
3115 ncons = 0;
3116 for (c = cladatum->validatetrans; c; c = c->next)
3117 ncons++;
3118
3119 buf[0] = cpu_to_le32(ncons);
3120 rc = put_entry(buf, sizeof(u32), 1, fp);
3121 if (rc)
3122 return rc;
3123
3124 rc = write_cons_helper(p, cladatum->validatetrans, fp);
3125 if (rc)
3126 return rc;
3127
3128 if (p->policyvers >= POLICYDB_VERSION_NEW_OBJECT_DEFAULTS) {
3129 buf[0] = cpu_to_le32(cladatum->default_user);
3130 buf[1] = cpu_to_le32(cladatum->default_role);
3131 buf[2] = cpu_to_le32(cladatum->default_range);
3132
3133 rc = put_entry(buf, sizeof(uint32_t), 3, fp);
3134 if (rc)
3135 return rc;
3136 }
3137
3138 if (p->policyvers >= POLICYDB_VERSION_DEFAULT_TYPE) {
3139 buf[0] = cpu_to_le32(cladatum->default_type);
3140 rc = put_entry(buf, sizeof(uint32_t), 1, fp);
3141 if (rc)
3142 return rc;
3143 }
3144
3145 return 0;
3146 }
3147
role_write(void * vkey,void * datum,void * ptr)3148 static int role_write(void *vkey, void *datum, void *ptr)
3149 {
3150 char *key = vkey;
3151 struct role_datum *role = datum;
3152 struct policy_data *pd = ptr;
3153 void *fp = pd->fp;
3154 struct policydb *p = pd->p;
3155 __le32 buf[3];
3156 size_t items, len;
3157 int rc;
3158
3159 len = strlen(key);
3160 items = 0;
3161 buf[items++] = cpu_to_le32(len);
3162 buf[items++] = cpu_to_le32(role->value);
3163 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
3164 buf[items++] = cpu_to_le32(role->bounds);
3165
3166 BUG_ON(items > ARRAY_SIZE(buf));
3167
3168 rc = put_entry(buf, sizeof(u32), items, fp);
3169 if (rc)
3170 return rc;
3171
3172 rc = put_entry(key, 1, len, fp);
3173 if (rc)
3174 return rc;
3175
3176 rc = ebitmap_write(&role->dominates, fp);
3177 if (rc)
3178 return rc;
3179
3180 rc = ebitmap_write(&role->types, fp);
3181 if (rc)
3182 return rc;
3183
3184 return 0;
3185 }
3186
type_write(void * vkey,void * datum,void * ptr)3187 static int type_write(void *vkey, void *datum, void *ptr)
3188 {
3189 char *key = vkey;
3190 struct type_datum *typdatum = datum;
3191 struct policy_data *pd = ptr;
3192 struct policydb *p = pd->p;
3193 void *fp = pd->fp;
3194 __le32 buf[4];
3195 int rc;
3196 size_t items, len;
3197
3198 len = strlen(key);
3199 items = 0;
3200 buf[items++] = cpu_to_le32(len);
3201 buf[items++] = cpu_to_le32(typdatum->value);
3202 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) {
3203 u32 properties = 0;
3204
3205 if (typdatum->primary)
3206 properties |= TYPEDATUM_PROPERTY_PRIMARY;
3207
3208 if (typdatum->attribute)
3209 properties |= TYPEDATUM_PROPERTY_ATTRIBUTE;
3210
3211 buf[items++] = cpu_to_le32(properties);
3212 buf[items++] = cpu_to_le32(typdatum->bounds);
3213 } else {
3214 buf[items++] = cpu_to_le32(typdatum->primary);
3215 }
3216 BUG_ON(items > ARRAY_SIZE(buf));
3217 rc = put_entry(buf, sizeof(u32), items, fp);
3218 if (rc)
3219 return rc;
3220
3221 rc = put_entry(key, 1, len, fp);
3222 if (rc)
3223 return rc;
3224
3225 return 0;
3226 }
3227
user_write(void * vkey,void * datum,void * ptr)3228 static int user_write(void *vkey, void *datum, void *ptr)
3229 {
3230 char *key = vkey;
3231 struct user_datum *usrdatum = datum;
3232 struct policy_data *pd = ptr;
3233 struct policydb *p = pd->p;
3234 void *fp = pd->fp;
3235 __le32 buf[3];
3236 size_t items, len;
3237 int rc;
3238
3239 len = strlen(key);
3240 items = 0;
3241 buf[items++] = cpu_to_le32(len);
3242 buf[items++] = cpu_to_le32(usrdatum->value);
3243 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
3244 buf[items++] = cpu_to_le32(usrdatum->bounds);
3245 BUG_ON(items > ARRAY_SIZE(buf));
3246 rc = put_entry(buf, sizeof(u32), items, fp);
3247 if (rc)
3248 return rc;
3249
3250 rc = put_entry(key, 1, len, fp);
3251 if (rc)
3252 return rc;
3253
3254 rc = ebitmap_write(&usrdatum->roles, fp);
3255 if (rc)
3256 return rc;
3257
3258 rc = mls_write_range_helper(&usrdatum->range, fp);
3259 if (rc)
3260 return rc;
3261
3262 rc = mls_write_level(&usrdatum->dfltlevel, fp);
3263 if (rc)
3264 return rc;
3265
3266 return 0;
3267 }
3268
3269 static int (*const write_f[SYM_NUM]) (void *key, void *datum, void *datap) = {
3270 common_write,
3271 class_write,
3272 role_write,
3273 type_write,
3274 user_write,
3275 cond_write_bool,
3276 sens_write,
3277 cat_write,
3278 };
3279
ocontext_write(struct policydb * p,const struct policydb_compat_info * info,void * fp)3280 static int ocontext_write(struct policydb *p, const struct policydb_compat_info *info,
3281 void *fp)
3282 {
3283 unsigned int i, j;
3284 int rc;
3285 size_t nel, len;
3286 __be64 prefixbuf[1];
3287 __le32 buf[3];
3288 u32 nodebuf[8];
3289 struct ocontext *c;
3290 for (i = 0; i < info->ocon_num; i++) {
3291 nel = 0;
3292 for (c = p->ocontexts[i]; c; c = c->next)
3293 nel++;
3294 buf[0] = cpu_to_le32(nel);
3295 rc = put_entry(buf, sizeof(u32), 1, fp);
3296 if (rc)
3297 return rc;
3298 for (c = p->ocontexts[i]; c; c = c->next) {
3299 switch (i) {
3300 case OCON_ISID:
3301 buf[0] = cpu_to_le32(c->sid[0]);
3302 rc = put_entry(buf, sizeof(u32), 1, fp);
3303 if (rc)
3304 return rc;
3305 rc = context_write(p, &c->context[0], fp);
3306 if (rc)
3307 return rc;
3308 break;
3309 case OCON_FS:
3310 case OCON_NETIF:
3311 len = strlen(c->u.name);
3312 buf[0] = cpu_to_le32(len);
3313 rc = put_entry(buf, sizeof(u32), 1, fp);
3314 if (rc)
3315 return rc;
3316 rc = put_entry(c->u.name, 1, len, fp);
3317 if (rc)
3318 return rc;
3319 rc = context_write(p, &c->context[0], fp);
3320 if (rc)
3321 return rc;
3322 rc = context_write(p, &c->context[1], fp);
3323 if (rc)
3324 return rc;
3325 break;
3326 case OCON_PORT:
3327 buf[0] = cpu_to_le32(c->u.port.protocol);
3328 buf[1] = cpu_to_le32(c->u.port.low_port);
3329 buf[2] = cpu_to_le32(c->u.port.high_port);
3330 rc = put_entry(buf, sizeof(u32), 3, fp);
3331 if (rc)
3332 return rc;
3333 rc = context_write(p, &c->context[0], fp);
3334 if (rc)
3335 return rc;
3336 break;
3337 case OCON_NODE:
3338 nodebuf[0] = c->u.node.addr; /* network order */
3339 nodebuf[1] = c->u.node.mask; /* network order */
3340 rc = put_entry(nodebuf, sizeof(u32), 2, fp);
3341 if (rc)
3342 return rc;
3343 rc = context_write(p, &c->context[0], fp);
3344 if (rc)
3345 return rc;
3346 break;
3347 case OCON_FSUSE:
3348 buf[0] = cpu_to_le32(c->v.behavior);
3349 len = strlen(c->u.name);
3350 buf[1] = cpu_to_le32(len);
3351 rc = put_entry(buf, sizeof(u32), 2, fp);
3352 if (rc)
3353 return rc;
3354 rc = put_entry(c->u.name, 1, len, fp);
3355 if (rc)
3356 return rc;
3357 rc = context_write(p, &c->context[0], fp);
3358 if (rc)
3359 return rc;
3360 break;
3361 case OCON_NODE6:
3362 for (j = 0; j < 4; j++)
3363 nodebuf[j] = c->u.node6.addr[j]; /* network order */
3364 for (j = 0; j < 4; j++)
3365 nodebuf[j + 4] = c->u.node6.mask[j]; /* network order */
3366 rc = put_entry(nodebuf, sizeof(u32), 8, fp);
3367 if (rc)
3368 return rc;
3369 rc = context_write(p, &c->context[0], fp);
3370 if (rc)
3371 return rc;
3372 break;
3373 case OCON_IBPKEY:
3374 /* subnet_prefix is in CPU order */
3375 prefixbuf[0] = cpu_to_be64(c->u.ibpkey.subnet_prefix);
3376
3377 rc = put_entry(prefixbuf, sizeof(u64), 1, fp);
3378 if (rc)
3379 return rc;
3380
3381 buf[0] = cpu_to_le32(c->u.ibpkey.low_pkey);
3382 buf[1] = cpu_to_le32(c->u.ibpkey.high_pkey);
3383
3384 rc = put_entry(buf, sizeof(u32), 2, fp);
3385 if (rc)
3386 return rc;
3387 rc = context_write(p, &c->context[0], fp);
3388 if (rc)
3389 return rc;
3390 break;
3391 case OCON_IBENDPORT:
3392 len = strlen(c->u.ibendport.dev_name);
3393 buf[0] = cpu_to_le32(len);
3394 buf[1] = cpu_to_le32(c->u.ibendport.port);
3395 rc = put_entry(buf, sizeof(u32), 2, fp);
3396 if (rc)
3397 return rc;
3398 rc = put_entry(c->u.ibendport.dev_name, 1, len, fp);
3399 if (rc)
3400 return rc;
3401 rc = context_write(p, &c->context[0], fp);
3402 if (rc)
3403 return rc;
3404 break;
3405 }
3406 }
3407 }
3408 return 0;
3409 }
3410
genfs_write(struct policydb * p,void * fp)3411 static int genfs_write(struct policydb *p, void *fp)
3412 {
3413 struct genfs *genfs;
3414 struct ocontext *c;
3415 size_t len;
3416 __le32 buf[1];
3417 int rc;
3418
3419 len = 0;
3420 for (genfs = p->genfs; genfs; genfs = genfs->next)
3421 len++;
3422 buf[0] = cpu_to_le32(len);
3423 rc = put_entry(buf, sizeof(u32), 1, fp);
3424 if (rc)
3425 return rc;
3426 for (genfs = p->genfs; genfs; genfs = genfs->next) {
3427 len = strlen(genfs->fstype);
3428 buf[0] = cpu_to_le32(len);
3429 rc = put_entry(buf, sizeof(u32), 1, fp);
3430 if (rc)
3431 return rc;
3432 rc = put_entry(genfs->fstype, 1, len, fp);
3433 if (rc)
3434 return rc;
3435 len = 0;
3436 for (c = genfs->head; c; c = c->next)
3437 len++;
3438 buf[0] = cpu_to_le32(len);
3439 rc = put_entry(buf, sizeof(u32), 1, fp);
3440 if (rc)
3441 return rc;
3442 for (c = genfs->head; c; c = c->next) {
3443 len = strlen(c->u.name);
3444 buf[0] = cpu_to_le32(len);
3445 rc = put_entry(buf, sizeof(u32), 1, fp);
3446 if (rc)
3447 return rc;
3448 rc = put_entry(c->u.name, 1, len, fp);
3449 if (rc)
3450 return rc;
3451 buf[0] = cpu_to_le32(c->v.sclass);
3452 rc = put_entry(buf, sizeof(u32), 1, fp);
3453 if (rc)
3454 return rc;
3455 rc = context_write(p, &c->context[0], fp);
3456 if (rc)
3457 return rc;
3458 }
3459 }
3460 return 0;
3461 }
3462
range_write_helper(void * key,void * data,void * ptr)3463 static int range_write_helper(void *key, void *data, void *ptr)
3464 {
3465 __le32 buf[2];
3466 struct range_trans *rt = key;
3467 struct mls_range *r = data;
3468 struct policy_data *pd = ptr;
3469 void *fp = pd->fp;
3470 struct policydb *p = pd->p;
3471 int rc;
3472
3473 buf[0] = cpu_to_le32(rt->source_type);
3474 buf[1] = cpu_to_le32(rt->target_type);
3475 rc = put_entry(buf, sizeof(u32), 2, fp);
3476 if (rc)
3477 return rc;
3478 if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) {
3479 buf[0] = cpu_to_le32(rt->target_class);
3480 rc = put_entry(buf, sizeof(u32), 1, fp);
3481 if (rc)
3482 return rc;
3483 }
3484 rc = mls_write_range_helper(r, fp);
3485 if (rc)
3486 return rc;
3487
3488 return 0;
3489 }
3490
range_write(struct policydb * p,void * fp)3491 static int range_write(struct policydb *p, void *fp)
3492 {
3493 __le32 buf[1];
3494 int rc;
3495 struct policy_data pd;
3496
3497 pd.p = p;
3498 pd.fp = fp;
3499
3500 buf[0] = cpu_to_le32(p->range_tr.nel);
3501 rc = put_entry(buf, sizeof(u32), 1, fp);
3502 if (rc)
3503 return rc;
3504
3505 /* actually write all of the entries */
3506 rc = hashtab_map(&p->range_tr, range_write_helper, &pd);
3507 if (rc)
3508 return rc;
3509
3510 return 0;
3511 }
3512
filename_write_helper_compat(void * key,void * data,void * ptr)3513 static int filename_write_helper_compat(void *key, void *data, void *ptr)
3514 {
3515 struct filename_trans_key *ft = key;
3516 struct filename_trans_datum *datum = data;
3517 struct ebitmap_node *node;
3518 void *fp = ptr;
3519 __le32 buf[4];
3520 int rc;
3521 u32 bit, len = strlen(ft->name);
3522
3523 do {
3524 ebitmap_for_each_positive_bit(&datum->stypes, node, bit) {
3525 buf[0] = cpu_to_le32(len);
3526 rc = put_entry(buf, sizeof(u32), 1, fp);
3527 if (rc)
3528 return rc;
3529
3530 rc = put_entry(ft->name, sizeof(char), len, fp);
3531 if (rc)
3532 return rc;
3533
3534 buf[0] = cpu_to_le32(bit + 1);
3535 buf[1] = cpu_to_le32(ft->ttype);
3536 buf[2] = cpu_to_le32(ft->tclass);
3537 buf[3] = cpu_to_le32(datum->otype);
3538
3539 rc = put_entry(buf, sizeof(u32), 4, fp);
3540 if (rc)
3541 return rc;
3542 }
3543
3544 datum = datum->next;
3545 } while (unlikely(datum));
3546
3547 return 0;
3548 }
3549
filename_write_helper(void * key,void * data,void * ptr)3550 static int filename_write_helper(void *key, void *data, void *ptr)
3551 {
3552 struct filename_trans_key *ft = key;
3553 struct filename_trans_datum *datum;
3554 void *fp = ptr;
3555 __le32 buf[3];
3556 int rc;
3557 u32 ndatum, len = strlen(ft->name);
3558
3559 buf[0] = cpu_to_le32(len);
3560 rc = put_entry(buf, sizeof(u32), 1, fp);
3561 if (rc)
3562 return rc;
3563
3564 rc = put_entry(ft->name, sizeof(char), len, fp);
3565 if (rc)
3566 return rc;
3567
3568 ndatum = 0;
3569 datum = data;
3570 do {
3571 ndatum++;
3572 datum = datum->next;
3573 } while (unlikely(datum));
3574
3575 buf[0] = cpu_to_le32(ft->ttype);
3576 buf[1] = cpu_to_le32(ft->tclass);
3577 buf[2] = cpu_to_le32(ndatum);
3578 rc = put_entry(buf, sizeof(u32), 3, fp);
3579 if (rc)
3580 return rc;
3581
3582 datum = data;
3583 do {
3584 rc = ebitmap_write(&datum->stypes, fp);
3585 if (rc)
3586 return rc;
3587
3588 buf[0] = cpu_to_le32(datum->otype);
3589 rc = put_entry(buf, sizeof(u32), 1, fp);
3590 if (rc)
3591 return rc;
3592
3593 datum = datum->next;
3594 } while (unlikely(datum));
3595
3596 return 0;
3597 }
3598
filename_trans_write(struct policydb * p,void * fp)3599 static int filename_trans_write(struct policydb *p, void *fp)
3600 {
3601 __le32 buf[1];
3602 int rc;
3603
3604 if (p->policyvers < POLICYDB_VERSION_FILENAME_TRANS)
3605 return 0;
3606
3607 if (p->policyvers < POLICYDB_VERSION_COMP_FTRANS) {
3608 buf[0] = cpu_to_le32(p->compat_filename_trans_count);
3609 rc = put_entry(buf, sizeof(u32), 1, fp);
3610 if (rc)
3611 return rc;
3612
3613 rc = hashtab_map(&p->filename_trans,
3614 filename_write_helper_compat, fp);
3615 } else {
3616 buf[0] = cpu_to_le32(p->filename_trans.nel);
3617 rc = put_entry(buf, sizeof(u32), 1, fp);
3618 if (rc)
3619 return rc;
3620
3621 rc = hashtab_map(&p->filename_trans, filename_write_helper, fp);
3622 }
3623 return rc;
3624 }
3625
3626 /*
3627 * Write the configuration data in a policy database
3628 * structure to a policy database binary representation
3629 * file.
3630 */
policydb_write(struct policydb * p,void * fp)3631 int policydb_write(struct policydb *p, void *fp)
3632 {
3633 unsigned int num_syms;
3634 int rc;
3635 __le32 buf[4];
3636 u32 config, i;
3637 size_t len;
3638 const struct policydb_compat_info *info;
3639
3640 /*
3641 * refuse to write policy older than compressed avtab
3642 * to simplify the writer. There are other tests dropped
3643 * since we assume this throughout the writer code. Be
3644 * careful if you ever try to remove this restriction
3645 */
3646 if (p->policyvers < POLICYDB_VERSION_AVTAB) {
3647 pr_err("SELinux: refusing to write policy version %d."
3648 " Because it is less than version %d\n", p->policyvers,
3649 POLICYDB_VERSION_AVTAB);
3650 return -EINVAL;
3651 }
3652
3653 config = 0;
3654 if (p->mls_enabled)
3655 config |= POLICYDB_CONFIG_MLS;
3656
3657 if (p->reject_unknown)
3658 config |= REJECT_UNKNOWN;
3659 if (p->allow_unknown)
3660 config |= ALLOW_UNKNOWN;
3661
3662 /* Write the magic number and string identifiers. */
3663 buf[0] = cpu_to_le32(POLICYDB_MAGIC);
3664 len = strlen(POLICYDB_STRING);
3665 buf[1] = cpu_to_le32(len);
3666 rc = put_entry(buf, sizeof(u32), 2, fp);
3667 if (rc)
3668 return rc;
3669 rc = put_entry(POLICYDB_STRING, 1, len, fp);
3670 if (rc)
3671 return rc;
3672
3673 /* Write the version, config, and table sizes. */
3674 info = policydb_lookup_compat(p->policyvers);
3675 if (!info) {
3676 pr_err("SELinux: compatibility lookup failed for policy "
3677 "version %d\n", p->policyvers);
3678 return -EINVAL;
3679 }
3680
3681 buf[0] = cpu_to_le32(p->policyvers);
3682 buf[1] = cpu_to_le32(config);
3683 buf[2] = cpu_to_le32(info->sym_num);
3684 buf[3] = cpu_to_le32(info->ocon_num);
3685
3686 rc = put_entry(buf, sizeof(u32), 4, fp);
3687 if (rc)
3688 return rc;
3689
3690 if (p->policyvers >= POLICYDB_VERSION_POLCAP) {
3691 rc = ebitmap_write(&p->policycaps, fp);
3692 if (rc)
3693 return rc;
3694 }
3695
3696 if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE) {
3697 rc = ebitmap_write(&p->permissive_map, fp);
3698 if (rc)
3699 return rc;
3700 }
3701
3702 num_syms = info->sym_num;
3703 for (i = 0; i < num_syms; i++) {
3704 struct policy_data pd;
3705
3706 pd.fp = fp;
3707 pd.p = p;
3708
3709 buf[0] = cpu_to_le32(p->symtab[i].nprim);
3710 buf[1] = cpu_to_le32(p->symtab[i].table.nel);
3711
3712 rc = put_entry(buf, sizeof(u32), 2, fp);
3713 if (rc)
3714 return rc;
3715 rc = hashtab_map(&p->symtab[i].table, write_f[i], &pd);
3716 if (rc)
3717 return rc;
3718 }
3719
3720 rc = avtab_write(p, &p->te_avtab, fp);
3721 if (rc)
3722 return rc;
3723
3724 rc = cond_write_list(p, fp);
3725 if (rc)
3726 return rc;
3727
3728 rc = role_trans_write(p, fp);
3729 if (rc)
3730 return rc;
3731
3732 rc = role_allow_write(p->role_allow, fp);
3733 if (rc)
3734 return rc;
3735
3736 rc = filename_trans_write(p, fp);
3737 if (rc)
3738 return rc;
3739
3740 rc = ocontext_write(p, info, fp);
3741 if (rc)
3742 return rc;
3743
3744 rc = genfs_write(p, fp);
3745 if (rc)
3746 return rc;
3747
3748 rc = range_write(p, fp);
3749 if (rc)
3750 return rc;
3751
3752 for (i = 0; i < p->p_types.nprim; i++) {
3753 struct ebitmap *e = &p->type_attr_map_array[i];
3754
3755 rc = ebitmap_write(e, fp);
3756 if (rc)
3757 return rc;
3758 }
3759
3760 return 0;
3761 }
3762