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Linux 4.9.199
[linux/fpc-iii.git] / security / selinux / ss / policydb.c
blobaf9cc839856f65ad81f6e7267b431d97776dd518
1 /*
2 * Implementation of the policy database.
3 *
4 * Author : Stephen Smalley, <sds@epoch.ncsc.mil>
5 */
6
7 /*
8 * Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com>
9 *
10 * Support for enhanced MLS infrastructure.
11 *
12 * Updated: Frank Mayer <mayerf@tresys.com> and Karl MacMillan <kmacmillan@tresys.com>
13 *
14 * Added conditional policy language extensions
15 *
16 * Updated: Hewlett-Packard <paul@paul-moore.com>
17 *
18 * Added support for the policy capability bitmap
19 *
20 * Copyright (C) 2007 Hewlett-Packard Development Company, L.P.
21 * Copyright (C) 2004-2005 Trusted Computer Solutions, Inc.
22 * Copyright (C) 2003 - 2004 Tresys Technology, LLC
23 * This program is free software; you can redistribute it and/or modify
24 * it under the terms of the GNU General Public License as published by
25 * the Free Software Foundation, version 2.
26 */
27
28 #include <linux/kernel.h>
29 #include <linux/sched.h>
30 #include <linux/slab.h>
31 #include <linux/string.h>
32 #include <linux/errno.h>
33 #include <linux/audit.h>
34 #include <linux/flex_array.h>
35 #include "security.h"
36
37 #include "policydb.h"
38 #include "conditional.h"
39 #include "mls.h"
40 #include "services.h"
41
42 #define _DEBUG_HASHES
43
44 #ifdef DEBUG_HASHES
45 static const char *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 static unsigned int symtab_sizes[SYM_NUM] = {
58 2,
59 32,
60 16,
61 512,
62 128,
63 16,
64 16,
65 16,
66 };
67
68 struct policydb_compat_info {
69 int version;
70 int sym_num;
71 int ocon_num;
72 };
73
74 /* These need to be updated if SYM_NUM or OCON_NUM changes */
75 static struct policydb_compat_info policydb_compat[] = {
76 {
77 .version = POLICYDB_VERSION_BASE,
78 .sym_num = SYM_NUM - 3,
79 .ocon_num = OCON_NUM - 1,
80 },
81 {
82 .version = POLICYDB_VERSION_BOOL,
83 .sym_num = SYM_NUM - 2,
84 .ocon_num = OCON_NUM - 1,
85 },
86 {
87 .version = POLICYDB_VERSION_IPV6,
88 .sym_num = SYM_NUM - 2,
89 .ocon_num = OCON_NUM,
90 },
91 {
92 .version = POLICYDB_VERSION_NLCLASS,
93 .sym_num = SYM_NUM - 2,
94 .ocon_num = OCON_NUM,
95 },
96 {
97 .version = POLICYDB_VERSION_MLS,
98 .sym_num = SYM_NUM,
99 .ocon_num = OCON_NUM,
100 },
101 {
102 .version = POLICYDB_VERSION_AVTAB,
103 .sym_num = SYM_NUM,
104 .ocon_num = OCON_NUM,
105 },
106 {
107 .version = POLICYDB_VERSION_RANGETRANS,
108 .sym_num = SYM_NUM,
109 .ocon_num = OCON_NUM,
110 },
111 {
112 .version = POLICYDB_VERSION_POLCAP,
113 .sym_num = SYM_NUM,
114 .ocon_num = OCON_NUM,
115 },
116 {
117 .version = POLICYDB_VERSION_PERMISSIVE,
118 .sym_num = SYM_NUM,
119 .ocon_num = OCON_NUM,
120 },
121 {
122 .version = POLICYDB_VERSION_BOUNDARY,
123 .sym_num = SYM_NUM,
124 .ocon_num = OCON_NUM,
125 },
126 {
127 .version = POLICYDB_VERSION_FILENAME_TRANS,
128 .sym_num = SYM_NUM,
129 .ocon_num = OCON_NUM,
130 },
131 {
132 .version = POLICYDB_VERSION_ROLETRANS,
133 .sym_num = SYM_NUM,
134 .ocon_num = OCON_NUM,
135 },
136 {
137 .version = POLICYDB_VERSION_NEW_OBJECT_DEFAULTS,
138 .sym_num = SYM_NUM,
139 .ocon_num = OCON_NUM,
140 },
141 {
142 .version = POLICYDB_VERSION_DEFAULT_TYPE,
143 .sym_num = SYM_NUM,
144 .ocon_num = OCON_NUM,
145 },
146 {
147 .version = POLICYDB_VERSION_CONSTRAINT_NAMES,
148 .sym_num = SYM_NUM,
149 .ocon_num = OCON_NUM,
150 },
151 {
152 .version = POLICYDB_VERSION_XPERMS_IOCTL,
153 .sym_num = SYM_NUM,
154 .ocon_num = OCON_NUM,
155 },
156 };
157
158 static struct policydb_compat_info *policydb_lookup_compat(int version)
159 {
160 int i;
161 struct policydb_compat_info *info = NULL;
162
163 for (i = 0; i < ARRAY_SIZE(policydb_compat); i++) {
164 if (policydb_compat[i].version == version) {
165 info = &policydb_compat[i];
166 break;
167 }
168 }
169 return info;
170 }
171
172 /*
173 * Initialize the role table.
174 */
175 static int roles_init(struct policydb *p)
176 {
177 char *key = NULL;
178 int rc;
179 struct role_datum *role;
180
181 rc = -ENOMEM;
182 role = kzalloc(sizeof(*role), GFP_KERNEL);
183 if (!role)
184 goto out;
185
186 rc = -EINVAL;
187 role->value = ++p->p_roles.nprim;
188 if (role->value != OBJECT_R_VAL)
189 goto out;
190
191 rc = -ENOMEM;
192 key = kstrdup(OBJECT_R, GFP_KERNEL);
193 if (!key)
194 goto out;
195
196 rc = hashtab_insert(p->p_roles.table, key, role);
197 if (rc)
198 goto out;
199
200 return 0;
201 out:
202 kfree(key);
203 kfree(role);
204 return rc;
205 }
206
207 static u32 filenametr_hash(struct hashtab *h, const void *k)
208 {
209 const struct filename_trans *ft = k;
210 unsigned long hash;
211 unsigned int byte_num;
212 unsigned char focus;
213
214 hash = ft->stype ^ ft->ttype ^ ft->tclass;
215
216 byte_num = 0;
217 while ((focus = ft->name[byte_num++]))
218 hash = partial_name_hash(focus, hash);
219 return hash & (h->size - 1);
220 }
221
222 static int filenametr_cmp(struct hashtab *h, const void *k1, const void *k2)
223 {
224 const struct filename_trans *ft1 = k1;
225 const struct filename_trans *ft2 = k2;
226 int v;
227
228 v = ft1->stype - ft2->stype;
229 if (v)
230 return v;
231
232 v = ft1->ttype - ft2->ttype;
233 if (v)
234 return v;
235
236 v = ft1->tclass - ft2->tclass;
237 if (v)
238 return v;
239
240 return strcmp(ft1->name, ft2->name);
241
242 }
243
244 static u32 rangetr_hash(struct hashtab *h, const void *k)
245 {
246 const struct range_trans *key = k;
247 return (key->source_type + (key->target_type << 3) +
248 (key->target_class << 5)) & (h->size - 1);
249 }
250
251 static int rangetr_cmp(struct hashtab *h, const void *k1, const void *k2)
252 {
253 const struct range_trans *key1 = k1, *key2 = k2;
254 int v;
255
256 v = key1->source_type - key2->source_type;
257 if (v)
258 return v;
259
260 v = key1->target_type - key2->target_type;
261 if (v)
262 return v;
263
264 v = key1->target_class - key2->target_class;
265
266 return v;
267 }
268
269 static int (*destroy_f[SYM_NUM]) (void *key, void *datum, void *datap);
270
271 /*
272 * Initialize a policy database structure.
273 */
274 static int policydb_init(struct policydb *p)
275 {
276 int i, rc;
277
278 memset(p, 0, sizeof(*p));
279
280 for (i = 0; i < SYM_NUM; i++) {
281 rc = symtab_init(&p->symtab[i], symtab_sizes[i]);
282 if (rc)
283 goto out;
284 }
285
286 rc = avtab_init(&p->te_avtab);
287 if (rc)
288 goto out;
289
290 rc = roles_init(p);
291 if (rc)
292 goto out;
293
294 rc = cond_policydb_init(p);
295 if (rc)
296 goto out;
297
298 p->filename_trans = hashtab_create(filenametr_hash, filenametr_cmp, (1 << 10));
299 if (!p->filename_trans) {
300 rc = -ENOMEM;
301 goto out;
302 }
303
304 p->range_tr = hashtab_create(rangetr_hash, rangetr_cmp, 256);
305 if (!p->range_tr) {
306 rc = -ENOMEM;
307 goto out;
308 }
309
310 ebitmap_init(&p->filename_trans_ttypes);
311 ebitmap_init(&p->policycaps);
312 ebitmap_init(&p->permissive_map);
313
314 return 0;
315 out:
316 hashtab_destroy(p->filename_trans);
317 hashtab_destroy(p->range_tr);
318 for (i = 0; i < SYM_NUM; i++) {
319 hashtab_map(p->symtab[i].table, destroy_f[i], NULL);
320 hashtab_destroy(p->symtab[i].table);
321 }
322 return rc;
323 }
324
325 /*
326 * The following *_index functions are used to
327 * define the val_to_name and val_to_struct arrays
328 * in a policy database structure. The val_to_name
329 * arrays are used when converting security context
330 * structures into string representations. The
331 * val_to_struct arrays are used when the attributes
332 * of a class, role, or user are needed.
333 */
334
335 static int common_index(void *key, void *datum, void *datap)
336 {
337 struct policydb *p;
338 struct common_datum *comdatum;
339 struct flex_array *fa;
340
341 comdatum = datum;
342 p = datap;
343 if (!comdatum->value || comdatum->value > p->p_commons.nprim)
344 return -EINVAL;
345
346 fa = p->sym_val_to_name[SYM_COMMONS];
347 if (flex_array_put_ptr(fa, comdatum->value - 1, key,
348 GFP_KERNEL | __GFP_ZERO))
349 BUG();
350 return 0;
351 }
352
353 static int class_index(void *key, void *datum, void *datap)
354 {
355 struct policydb *p;
356 struct class_datum *cladatum;
357 struct flex_array *fa;
358
359 cladatum = datum;
360 p = datap;
361 if (!cladatum->value || cladatum->value > p->p_classes.nprim)
362 return -EINVAL;
363 fa = p->sym_val_to_name[SYM_CLASSES];
364 if (flex_array_put_ptr(fa, cladatum->value - 1, key,
365 GFP_KERNEL | __GFP_ZERO))
366 BUG();
367 p->class_val_to_struct[cladatum->value - 1] = cladatum;
368 return 0;
369 }
370
371 static int role_index(void *key, void *datum, void *datap)
372 {
373 struct policydb *p;
374 struct role_datum *role;
375 struct flex_array *fa;
376
377 role = datum;
378 p = datap;
379 if (!role->value
380 || role->value > p->p_roles.nprim
381 || role->bounds > p->p_roles.nprim)
382 return -EINVAL;
383
384 fa = p->sym_val_to_name[SYM_ROLES];
385 if (flex_array_put_ptr(fa, role->value - 1, key,
386 GFP_KERNEL | __GFP_ZERO))
387 BUG();
388 p->role_val_to_struct[role->value - 1] = role;
389 return 0;
390 }
391
392 static int type_index(void *key, void *datum, void *datap)
393 {
394 struct policydb *p;
395 struct type_datum *typdatum;
396 struct flex_array *fa;
397
398 typdatum = datum;
399 p = datap;
400
401 if (typdatum->primary) {
402 if (!typdatum->value
403 || typdatum->value > p->p_types.nprim
404 || typdatum->bounds > p->p_types.nprim)
405 return -EINVAL;
406 fa = p->sym_val_to_name[SYM_TYPES];
407 if (flex_array_put_ptr(fa, typdatum->value - 1, key,
408 GFP_KERNEL | __GFP_ZERO))
409 BUG();
410
411 fa = p->type_val_to_struct_array;
412 if (flex_array_put_ptr(fa, typdatum->value - 1, typdatum,
413 GFP_KERNEL | __GFP_ZERO))
414 BUG();
415 }
416
417 return 0;
418 }
419
420 static int user_index(void *key, void *datum, void *datap)
421 {
422 struct policydb *p;
423 struct user_datum *usrdatum;
424 struct flex_array *fa;
425
426 usrdatum = datum;
427 p = datap;
428 if (!usrdatum->value
429 || usrdatum->value > p->p_users.nprim
430 || usrdatum->bounds > p->p_users.nprim)
431 return -EINVAL;
432
433 fa = p->sym_val_to_name[SYM_USERS];
434 if (flex_array_put_ptr(fa, usrdatum->value - 1, key,
435 GFP_KERNEL | __GFP_ZERO))
436 BUG();
437 p->user_val_to_struct[usrdatum->value - 1] = usrdatum;
438 return 0;
439 }
440
441 static int sens_index(void *key, void *datum, void *datap)
442 {
443 struct policydb *p;
444 struct level_datum *levdatum;
445 struct flex_array *fa;
446
447 levdatum = datum;
448 p = datap;
449
450 if (!levdatum->isalias) {
451 if (!levdatum->level->sens ||
452 levdatum->level->sens > p->p_levels.nprim)
453 return -EINVAL;
454 fa = p->sym_val_to_name[SYM_LEVELS];
455 if (flex_array_put_ptr(fa, levdatum->level->sens - 1, key,
456 GFP_KERNEL | __GFP_ZERO))
457 BUG();
458 }
459
460 return 0;
461 }
462
463 static int cat_index(void *key, void *datum, void *datap)
464 {
465 struct policydb *p;
466 struct cat_datum *catdatum;
467 struct flex_array *fa;
468
469 catdatum = datum;
470 p = datap;
471
472 if (!catdatum->isalias) {
473 if (!catdatum->value || catdatum->value > p->p_cats.nprim)
474 return -EINVAL;
475 fa = p->sym_val_to_name[SYM_CATS];
476 if (flex_array_put_ptr(fa, catdatum->value - 1, key,
477 GFP_KERNEL | __GFP_ZERO))
478 BUG();
479 }
480
481 return 0;
482 }
483
484 static int (*index_f[SYM_NUM]) (void *key, void *datum, void *datap) =
485 {
486 common_index,
487 class_index,
488 role_index,
489 type_index,
490 user_index,
491 cond_index_bool,
492 sens_index,
493 cat_index,
494 };
495
496 #ifdef DEBUG_HASHES
497 static void hash_eval(struct hashtab *h, const char *hash_name)
498 {
499 struct hashtab_info info;
500
501 hashtab_stat(h, &info);
502 printk(KERN_DEBUG "SELinux: %s: %d entries and %d/%d buckets used, "
503 "longest chain length %d\n", hash_name, h->nel,
504 info.slots_used, h->size, info.max_chain_len);
505 }
506
507 static void symtab_hash_eval(struct symtab *s)
508 {
509 int i;
510
511 for (i = 0; i < SYM_NUM; i++)
512 hash_eval(s[i].table, symtab_name[i]);
513 }
514
515 #else
516 static inline void hash_eval(struct hashtab *h, char *hash_name)
517 {
518 }
519 #endif
520
521 /*
522 * Define the other val_to_name and val_to_struct arrays
523 * in a policy database structure.
524 *
525 * Caller must clean up on failure.
526 */
527 static int policydb_index(struct policydb *p)
528 {
529 int i, rc;
530
531 printk(KERN_DEBUG "SELinux: %d users, %d roles, %d types, %d bools",
532 p->p_users.nprim, p->p_roles.nprim, p->p_types.nprim, p->p_bools.nprim);
533 if (p->mls_enabled)
534 printk(KERN_CONT ", %d sens, %d cats", p->p_levels.nprim,
535 p->p_cats.nprim);
536 printk(KERN_CONT "\n");
537
538 printk(KERN_DEBUG "SELinux: %d classes, %d rules\n",
539 p->p_classes.nprim, p->te_avtab.nel);
540
541 #ifdef DEBUG_HASHES
542 avtab_hash_eval(&p->te_avtab, "rules");
543 symtab_hash_eval(p->symtab);
544 #endif
545
546 rc = -ENOMEM;
547 p->class_val_to_struct =
548 kzalloc(p->p_classes.nprim * sizeof(*(p->class_val_to_struct)),
549 GFP_KERNEL);
550 if (!p->class_val_to_struct)
551 goto out;
552
553 rc = -ENOMEM;
554 p->role_val_to_struct =
555 kzalloc(p->p_roles.nprim * sizeof(*(p->role_val_to_struct)),
556 GFP_KERNEL);
557 if (!p->role_val_to_struct)
558 goto out;
559
560 rc = -ENOMEM;
561 p->user_val_to_struct =
562 kzalloc(p->p_users.nprim * sizeof(*(p->user_val_to_struct)),
563 GFP_KERNEL);
564 if (!p->user_val_to_struct)
565 goto out;
566
567 /* Yes, I want the sizeof the pointer, not the structure */
568 rc = -ENOMEM;
569 p->type_val_to_struct_array = flex_array_alloc(sizeof(struct type_datum *),
570 p->p_types.nprim,
571 GFP_KERNEL | __GFP_ZERO);
572 if (!p->type_val_to_struct_array)
573 goto out;
574
575 rc = flex_array_prealloc(p->type_val_to_struct_array, 0,
576 p->p_types.nprim, GFP_KERNEL | __GFP_ZERO);
577 if (rc)
578 goto out;
579
580 rc = cond_init_bool_indexes(p);
581 if (rc)
582 goto out;
583
584 for (i = 0; i < SYM_NUM; i++) {
585 rc = -ENOMEM;
586 p->sym_val_to_name[i] = flex_array_alloc(sizeof(char *),
587 p->symtab[i].nprim,
588 GFP_KERNEL | __GFP_ZERO);
589 if (!p->sym_val_to_name[i])
590 goto out;
591
592 rc = flex_array_prealloc(p->sym_val_to_name[i],
593 0, p->symtab[i].nprim,
594 GFP_KERNEL | __GFP_ZERO);
595 if (rc)
596 goto out;
597
598 rc = hashtab_map(p->symtab[i].table, index_f[i], p);
599 if (rc)
600 goto out;
601 }
602 rc = 0;
603 out:
604 return rc;
605 }
606
607 /*
608 * The following *_destroy functions are used to
609 * free any memory allocated for each kind of
610 * symbol data in the policy database.
611 */
612
613 static int perm_destroy(void *key, void *datum, void *p)
614 {
615 kfree(key);
616 kfree(datum);
617 return 0;
618 }
619
620 static int common_destroy(void *key, void *datum, void *p)
621 {
622 struct common_datum *comdatum;
623
624 kfree(key);
625 if (datum) {
626 comdatum = datum;
627 hashtab_map(comdatum->permissions.table, perm_destroy, NULL);
628 hashtab_destroy(comdatum->permissions.table);
629 }
630 kfree(datum);
631 return 0;
632 }
633
634 static void constraint_expr_destroy(struct constraint_expr *expr)
635 {
636 if (expr) {
637 ebitmap_destroy(&expr->names);
638 if (expr->type_names) {
639 ebitmap_destroy(&expr->type_names->types);
640 ebitmap_destroy(&expr->type_names->negset);
641 kfree(expr->type_names);
642 }
643 kfree(expr);
644 }
645 }
646
647 static int cls_destroy(void *key, void *datum, void *p)
648 {
649 struct class_datum *cladatum;
650 struct constraint_node *constraint, *ctemp;
651 struct constraint_expr *e, *etmp;
652
653 kfree(key);
654 if (datum) {
655 cladatum = datum;
656 hashtab_map(cladatum->permissions.table, perm_destroy, NULL);
657 hashtab_destroy(cladatum->permissions.table);
658 constraint = cladatum->constraints;
659 while (constraint) {
660 e = constraint->expr;
661 while (e) {
662 etmp = e;
663 e = e->next;
664 constraint_expr_destroy(etmp);
665 }
666 ctemp = constraint;
667 constraint = constraint->next;
668 kfree(ctemp);
669 }
670
671 constraint = cladatum->validatetrans;
672 while (constraint) {
673 e = constraint->expr;
674 while (e) {
675 etmp = e;
676 e = e->next;
677 constraint_expr_destroy(etmp);
678 }
679 ctemp = constraint;
680 constraint = constraint->next;
681 kfree(ctemp);
682 }
683 kfree(cladatum->comkey);
684 }
685 kfree(datum);
686 return 0;
687 }
688
689 static int role_destroy(void *key, void *datum, void *p)
690 {
691 struct role_datum *role;
692
693 kfree(key);
694 if (datum) {
695 role = datum;
696 ebitmap_destroy(&role->dominates);
697 ebitmap_destroy(&role->types);
698 }
699 kfree(datum);
700 return 0;
701 }
702
703 static int type_destroy(void *key, void *datum, void *p)
704 {
705 kfree(key);
706 kfree(datum);
707 return 0;
708 }
709
710 static int user_destroy(void *key, void *datum, void *p)
711 {
712 struct user_datum *usrdatum;
713
714 kfree(key);
715 if (datum) {
716 usrdatum = datum;
717 ebitmap_destroy(&usrdatum->roles);
718 ebitmap_destroy(&usrdatum->range.level[0].cat);
719 ebitmap_destroy(&usrdatum->range.level[1].cat);
720 ebitmap_destroy(&usrdatum->dfltlevel.cat);
721 }
722 kfree(datum);
723 return 0;
724 }
725
726 static int sens_destroy(void *key, void *datum, void *p)
727 {
728 struct level_datum *levdatum;
729
730 kfree(key);
731 if (datum) {
732 levdatum = datum;
733 if (levdatum->level)
734 ebitmap_destroy(&levdatum->level->cat);
735 kfree(levdatum->level);
736 }
737 kfree(datum);
738 return 0;
739 }
740
741 static int cat_destroy(void *key, void *datum, void *p)
742 {
743 kfree(key);
744 kfree(datum);
745 return 0;
746 }
747
748 static int (*destroy_f[SYM_NUM]) (void *key, void *datum, void *datap) =
749 {
750 common_destroy,
751 cls_destroy,
752 role_destroy,
753 type_destroy,
754 user_destroy,
755 cond_destroy_bool,
756 sens_destroy,
757 cat_destroy,
758 };
759
760 static int filenametr_destroy(void *key, void *datum, void *p)
761 {
762 struct filename_trans *ft = key;
763 kfree(ft->name);
764 kfree(key);
765 kfree(datum);
766 cond_resched();
767 return 0;
768 }
769
770 static int range_tr_destroy(void *key, void *datum, void *p)
771 {
772 struct mls_range *rt = datum;
773 kfree(key);
774 ebitmap_destroy(&rt->level[0].cat);
775 ebitmap_destroy(&rt->level[1].cat);
776 kfree(datum);
777 cond_resched();
778 return 0;
779 }
780
781 static void ocontext_destroy(struct ocontext *c, int i)
782 {
783 if (!c)
784 return;
785
786 context_destroy(&c->context[0]);
787 context_destroy(&c->context[1]);
788 if (i == OCON_ISID || i == OCON_FS ||
789 i == OCON_NETIF || i == OCON_FSUSE)
790 kfree(c->u.name);
791 kfree(c);
792 }
793
794 /*
795 * Free any memory allocated by a policy database structure.
796 */
797 void policydb_destroy(struct policydb *p)
798 {
799 struct ocontext *c, *ctmp;
800 struct genfs *g, *gtmp;
801 int i;
802 struct role_allow *ra, *lra = NULL;
803 struct role_trans *tr, *ltr = NULL;
804
805 for (i = 0; i < SYM_NUM; i++) {
806 cond_resched();
807 hashtab_map(p->symtab[i].table, destroy_f[i], NULL);
808 hashtab_destroy(p->symtab[i].table);
809 }
810
811 for (i = 0; i < SYM_NUM; i++) {
812 if (p->sym_val_to_name[i])
813 flex_array_free(p->sym_val_to_name[i]);
814 }
815
816 kfree(p->class_val_to_struct);
817 kfree(p->role_val_to_struct);
818 kfree(p->user_val_to_struct);
819 if (p->type_val_to_struct_array)
820 flex_array_free(p->type_val_to_struct_array);
821
822 avtab_destroy(&p->te_avtab);
823
824 for (i = 0; i < OCON_NUM; i++) {
825 cond_resched();
826 c = p->ocontexts[i];
827 while (c) {
828 ctmp = c;
829 c = c->next;
830 ocontext_destroy(ctmp, i);
831 }
832 p->ocontexts[i] = NULL;
833 }
834
835 g = p->genfs;
836 while (g) {
837 cond_resched();
838 kfree(g->fstype);
839 c = g->head;
840 while (c) {
841 ctmp = c;
842 c = c->next;
843 ocontext_destroy(ctmp, OCON_FSUSE);
844 }
845 gtmp = g;
846 g = g->next;
847 kfree(gtmp);
848 }
849 p->genfs = NULL;
850
851 cond_policydb_destroy(p);
852
853 for (tr = p->role_tr; tr; tr = tr->next) {
854 cond_resched();
855 kfree(ltr);
856 ltr = tr;
857 }
858 kfree(ltr);
859
860 for (ra = p->role_allow; ra; ra = ra->next) {
861 cond_resched();
862 kfree(lra);
863 lra = ra;
864 }
865 kfree(lra);
866
867 hashtab_map(p->filename_trans, filenametr_destroy, NULL);
868 hashtab_destroy(p->filename_trans);
869
870 hashtab_map(p->range_tr, range_tr_destroy, NULL);
871 hashtab_destroy(p->range_tr);
872
873 if (p->type_attr_map_array) {
874 for (i = 0; i < p->p_types.nprim; i++) {
875 struct ebitmap *e;
876
877 e = flex_array_get(p->type_attr_map_array, i);
878 if (!e)
879 continue;
880 ebitmap_destroy(e);
881 }
882 flex_array_free(p->type_attr_map_array);
883 }
884
885 ebitmap_destroy(&p->filename_trans_ttypes);
886 ebitmap_destroy(&p->policycaps);
887 ebitmap_destroy(&p->permissive_map);
888
889 return;
890 }
891
892 /*
893 * Load the initial SIDs specified in a policy database
894 * structure into a SID table.
895 */
896 int policydb_load_isids(struct policydb *p, struct sidtab *s)
897 {
898 struct ocontext *head, *c;
899 int rc;
900
901 rc = sidtab_init(s);
902 if (rc) {
903 printk(KERN_ERR "SELinux: out of memory on SID table init\n");
904 goto out;
905 }
906
907 head = p->ocontexts[OCON_ISID];
908 for (c = head; c; c = c->next) {
909 rc = -EINVAL;
910 if (!c->context[0].user) {
911 printk(KERN_ERR "SELinux: SID %s was never defined.\n",
912 c->u.name);
913 goto out;
914 }
915
916 rc = sidtab_insert(s, c->sid[0], &c->context[0]);
917 if (rc) {
918 printk(KERN_ERR "SELinux: unable to load initial SID %s.\n",
919 c->u.name);
920 goto out;
921 }
922 }
923 rc = 0;
924 out:
925 return rc;
926 }
927
928 int policydb_class_isvalid(struct policydb *p, unsigned int class)
929 {
930 if (!class || class > p->p_classes.nprim)
931 return 0;
932 return 1;
933 }
934
935 int policydb_role_isvalid(struct policydb *p, unsigned int role)
936 {
937 if (!role || role > p->p_roles.nprim)
938 return 0;
939 return 1;
940 }
941
942 int policydb_type_isvalid(struct policydb *p, unsigned int type)
943 {
944 if (!type || type > p->p_types.nprim)
945 return 0;
946 return 1;
947 }
948
949 /*
950 * Return 1 if the fields in the security context
951 * structure `c' are valid. Return 0 otherwise.
952 */
953 int policydb_context_isvalid(struct policydb *p, struct context *c)
954 {
955 struct role_datum *role;
956 struct user_datum *usrdatum;
957
958 if (!c->role || c->role > p->p_roles.nprim)
959 return 0;
960
961 if (!c->user || c->user > p->p_users.nprim)
962 return 0;
963
964 if (!c->type || c->type > p->p_types.nprim)
965 return 0;
966
967 if (c->role != OBJECT_R_VAL) {
968 /*
969 * Role must be authorized for the type.
970 */
971 role = p->role_val_to_struct[c->role - 1];
972 if (!role || !ebitmap_get_bit(&role->types, c->type - 1))
973 /* role may not be associated with type */
974 return 0;
975
976 /*
977 * User must be authorized for the role.
978 */
979 usrdatum = p->user_val_to_struct[c->user - 1];
980 if (!usrdatum)
981 return 0;
982
983 if (!ebitmap_get_bit(&usrdatum->roles, c->role - 1))
984 /* user may not be associated with role */
985 return 0;
986 }
987
988 if (!mls_context_isvalid(p, c))
989 return 0;
990
991 return 1;
992 }
993
994 /*
995 * Read a MLS range structure from a policydb binary
996 * representation file.
997 */
998 static int mls_read_range_helper(struct mls_range *r, void *fp)
999 {
1000 __le32 buf[2];
1001 u32 items;
1002 int rc;
1003
1004 rc = next_entry(buf, fp, sizeof(u32));
1005 if (rc)
1006 goto out;
1007
1008 rc = -EINVAL;
1009 items = le32_to_cpu(buf[0]);
1010 if (items > ARRAY_SIZE(buf)) {
1011 printk(KERN_ERR "SELinux: mls: range overflow\n");
1012 goto out;
1013 }
1014
1015 rc = next_entry(buf, fp, sizeof(u32) * items);
1016 if (rc) {
1017 printk(KERN_ERR "SELinux: mls: truncated range\n");
1018 goto out;
1019 }
1020
1021 r->level[0].sens = le32_to_cpu(buf[0]);
1022 if (items > 1)
1023 r->level[1].sens = le32_to_cpu(buf[1]);
1024 else
1025 r->level[1].sens = r->level[0].sens;
1026
1027 rc = ebitmap_read(&r->level[0].cat, fp);
1028 if (rc) {
1029 printk(KERN_ERR "SELinux: mls: error reading low categories\n");
1030 goto out;
1031 }
1032 if (items > 1) {
1033 rc = ebitmap_read(&r->level[1].cat, fp);
1034 if (rc) {
1035 printk(KERN_ERR "SELinux: mls: error reading high categories\n");
1036 goto bad_high;
1037 }
1038 } else {
1039 rc = ebitmap_cpy(&r->level[1].cat, &r->level[0].cat);
1040 if (rc) {
1041 printk(KERN_ERR "SELinux: mls: out of memory\n");
1042 goto bad_high;
1043 }
1044 }
1045
1046 return 0;
1047 bad_high:
1048 ebitmap_destroy(&r->level[0].cat);
1049 out:
1050 return rc;
1051 }
1052
1053 /*
1054 * Read and validate a security context structure
1055 * from a policydb binary representation file.
1056 */
1057 static int context_read_and_validate(struct context *c,
1058 struct policydb *p,
1059 void *fp)
1060 {
1061 __le32 buf[3];
1062 int rc;
1063
1064 rc = next_entry(buf, fp, sizeof buf);
1065 if (rc) {
1066 printk(KERN_ERR "SELinux: context truncated\n");
1067 goto out;
1068 }
1069 c->user = le32_to_cpu(buf[0]);
1070 c->role = le32_to_cpu(buf[1]);
1071 c->type = le32_to_cpu(buf[2]);
1072 if (p->policyvers >= POLICYDB_VERSION_MLS) {
1073 rc = mls_read_range_helper(&c->range, fp);
1074 if (rc) {
1075 printk(KERN_ERR "SELinux: error reading MLS range of context\n");
1076 goto out;
1077 }
1078 }
1079
1080 rc = -EINVAL;
1081 if (!policydb_context_isvalid(p, c)) {
1082 printk(KERN_ERR "SELinux: invalid security context\n");
1083 context_destroy(c);
1084 goto out;
1085 }
1086 rc = 0;
1087 out:
1088 return rc;
1089 }
1090
1091 /*
1092 * The following *_read functions are used to
1093 * read the symbol data from a policy database
1094 * binary representation file.
1095 */
1096
1097 static int str_read(char **strp, gfp_t flags, void *fp, u32 len)
1098 {
1099 int rc;
1100 char *str;
1101
1102 if ((len == 0) || (len == (u32)-1))
1103 return -EINVAL;
1104
1105 str = kmalloc(len + 1, flags | __GFP_NOWARN);
1106 if (!str)
1107 return -ENOMEM;
1108
1109 /* it's expected the caller should free the str */
1110 *strp = str;
1111
1112 rc = next_entry(str, fp, len);
1113 if (rc)
1114 return rc;
1115
1116 str[len] = '\0';
1117 return 0;
1118 }
1119
1120 static int perm_read(struct policydb *p, struct hashtab *h, void *fp)
1121 {
1122 char *key = NULL;
1123 struct perm_datum *perdatum;
1124 int rc;
1125 __le32 buf[2];
1126 u32 len;
1127
1128 rc = -ENOMEM;
1129 perdatum = kzalloc(sizeof(*perdatum), GFP_KERNEL);
1130 if (!perdatum)
1131 goto bad;
1132
1133 rc = next_entry(buf, fp, sizeof buf);
1134 if (rc)
1135 goto bad;
1136
1137 len = le32_to_cpu(buf[0]);
1138 perdatum->value = le32_to_cpu(buf[1]);
1139
1140 rc = str_read(&key, GFP_KERNEL, fp, len);
1141 if (rc)
1142 goto bad;
1143
1144 rc = hashtab_insert(h, key, perdatum);
1145 if (rc)
1146 goto bad;
1147
1148 return 0;
1149 bad:
1150 perm_destroy(key, perdatum, NULL);
1151 return rc;
1152 }
1153
1154 static int common_read(struct policydb *p, struct hashtab *h, void *fp)
1155 {
1156 char *key = NULL;
1157 struct common_datum *comdatum;
1158 __le32 buf[4];
1159 u32 len, nel;
1160 int i, rc;
1161
1162 rc = -ENOMEM;
1163 comdatum = kzalloc(sizeof(*comdatum), GFP_KERNEL);
1164 if (!comdatum)
1165 goto bad;
1166
1167 rc = next_entry(buf, fp, sizeof buf);
1168 if (rc)
1169 goto bad;
1170
1171 len = le32_to_cpu(buf[0]);
1172 comdatum->value = le32_to_cpu(buf[1]);
1173
1174 rc = symtab_init(&comdatum->permissions, PERM_SYMTAB_SIZE);
1175 if (rc)
1176 goto bad;
1177 comdatum->permissions.nprim = le32_to_cpu(buf[2]);
1178 nel = le32_to_cpu(buf[3]);
1179
1180 rc = str_read(&key, GFP_KERNEL, fp, len);
1181 if (rc)
1182 goto bad;
1183
1184 for (i = 0; i < nel; i++) {
1185 rc = perm_read(p, comdatum->permissions.table, fp);
1186 if (rc)
1187 goto bad;
1188 }
1189
1190 rc = hashtab_insert(h, key, comdatum);
1191 if (rc)
1192 goto bad;
1193 return 0;
1194 bad:
1195 common_destroy(key, comdatum, NULL);
1196 return rc;
1197 }
1198
1199 static void type_set_init(struct type_set *t)
1200 {
1201 ebitmap_init(&t->types);
1202 ebitmap_init(&t->negset);
1203 }
1204
1205 static int type_set_read(struct type_set *t, void *fp)
1206 {
1207 __le32 buf[1];
1208 int rc;
1209
1210 if (ebitmap_read(&t->types, fp))
1211 return -EINVAL;
1212 if (ebitmap_read(&t->negset, fp))
1213 return -EINVAL;
1214
1215 rc = next_entry(buf, fp, sizeof(u32));
1216 if (rc < 0)
1217 return -EINVAL;
1218 t->flags = le32_to_cpu(buf[0]);
1219
1220 return 0;
1221 }
1222
1223
1224 static int read_cons_helper(struct policydb *p,
1225 struct constraint_node **nodep,
1226 int ncons, int allowxtarget, void *fp)
1227 {
1228 struct constraint_node *c, *lc;
1229 struct constraint_expr *e, *le;
1230 __le32 buf[3];
1231 u32 nexpr;
1232 int rc, i, j, depth;
1233
1234 lc = NULL;
1235 for (i = 0; i < ncons; i++) {
1236 c = kzalloc(sizeof(*c), GFP_KERNEL);
1237 if (!c)
1238 return -ENOMEM;
1239
1240 if (lc)
1241 lc->next = c;
1242 else
1243 *nodep = c;
1244
1245 rc = next_entry(buf, fp, (sizeof(u32) * 2));
1246 if (rc)
1247 return rc;
1248 c->permissions = le32_to_cpu(buf[0]);
1249 nexpr = le32_to_cpu(buf[1]);
1250 le = NULL;
1251 depth = -1;
1252 for (j = 0; j < nexpr; j++) {
1253 e = kzalloc(sizeof(*e), GFP_KERNEL);
1254 if (!e)
1255 return -ENOMEM;
1256
1257 if (le)
1258 le->next = e;
1259 else
1260 c->expr = e;
1261
1262 rc = next_entry(buf, fp, (sizeof(u32) * 3));
1263 if (rc)
1264 return rc;
1265 e->expr_type = le32_to_cpu(buf[0]);
1266 e->attr = le32_to_cpu(buf[1]);
1267 e->op = le32_to_cpu(buf[2]);
1268
1269 switch (e->expr_type) {
1270 case CEXPR_NOT:
1271 if (depth < 0)
1272 return -EINVAL;
1273 break;
1274 case CEXPR_AND:
1275 case CEXPR_OR:
1276 if (depth < 1)
1277 return -EINVAL;
1278 depth--;
1279 break;
1280 case CEXPR_ATTR:
1281 if (depth == (CEXPR_MAXDEPTH - 1))
1282 return -EINVAL;
1283 depth++;
1284 break;
1285 case CEXPR_NAMES:
1286 if (!allowxtarget && (e->attr & CEXPR_XTARGET))
1287 return -EINVAL;
1288 if (depth == (CEXPR_MAXDEPTH - 1))
1289 return -EINVAL;
1290 depth++;
1291 rc = ebitmap_read(&e->names, fp);
1292 if (rc)
1293 return rc;
1294 if (p->policyvers >=
1295 POLICYDB_VERSION_CONSTRAINT_NAMES) {
1296 e->type_names = kzalloc(sizeof
1297 (*e->type_names),
1298 GFP_KERNEL);
1299 if (!e->type_names)
1300 return -ENOMEM;
1301 type_set_init(e->type_names);
1302 rc = type_set_read(e->type_names, fp);
1303 if (rc)
1304 return rc;
1305 }
1306 break;
1307 default:
1308 return -EINVAL;
1309 }
1310 le = e;
1311 }
1312 if (depth != 0)
1313 return -EINVAL;
1314 lc = c;
1315 }
1316
1317 return 0;
1318 }
1319
1320 static int class_read(struct policydb *p, struct hashtab *h, void *fp)
1321 {
1322 char *key = NULL;
1323 struct class_datum *cladatum;
1324 __le32 buf[6];
1325 u32 len, len2, ncons, nel;
1326 int i, rc;
1327
1328 rc = -ENOMEM;
1329 cladatum = kzalloc(sizeof(*cladatum), GFP_KERNEL);
1330 if (!cladatum)
1331 goto bad;
1332
1333 rc = next_entry(buf, fp, sizeof(u32)*6);
1334 if (rc)
1335 goto bad;
1336
1337 len = le32_to_cpu(buf[0]);
1338 len2 = le32_to_cpu(buf[1]);
1339 cladatum->value = le32_to_cpu(buf[2]);
1340
1341 rc = symtab_init(&cladatum->permissions, PERM_SYMTAB_SIZE);
1342 if (rc)
1343 goto bad;
1344 cladatum->permissions.nprim = le32_to_cpu(buf[3]);
1345 nel = le32_to_cpu(buf[4]);
1346
1347 ncons = le32_to_cpu(buf[5]);
1348
1349 rc = str_read(&key, GFP_KERNEL, fp, len);
1350 if (rc)
1351 goto bad;
1352
1353 if (len2) {
1354 rc = str_read(&cladatum->comkey, GFP_KERNEL, fp, len2);
1355 if (rc)
1356 goto bad;
1357
1358 rc = -EINVAL;
1359 cladatum->comdatum = hashtab_search(p->p_commons.table, cladatum->comkey);
1360 if (!cladatum->comdatum) {
1361 printk(KERN_ERR "SELinux: unknown common %s\n", cladatum->comkey);
1362 goto bad;
1363 }
1364 }
1365 for (i = 0; i < nel; i++) {
1366 rc = perm_read(p, cladatum->permissions.table, fp);
1367 if (rc)
1368 goto bad;
1369 }
1370
1371 rc = read_cons_helper(p, &cladatum->constraints, ncons, 0, fp);
1372 if (rc)
1373 goto bad;
1374
1375 if (p->policyvers >= POLICYDB_VERSION_VALIDATETRANS) {
1376 /* grab the validatetrans rules */
1377 rc = next_entry(buf, fp, sizeof(u32));
1378 if (rc)
1379 goto bad;
1380 ncons = le32_to_cpu(buf[0]);
1381 rc = read_cons_helper(p, &cladatum->validatetrans,
1382 ncons, 1, fp);
1383 if (rc)
1384 goto bad;
1385 }
1386
1387 if (p->policyvers >= POLICYDB_VERSION_NEW_OBJECT_DEFAULTS) {
1388 rc = next_entry(buf, fp, sizeof(u32) * 3);
1389 if (rc)
1390 goto bad;
1391
1392 cladatum->default_user = le32_to_cpu(buf[0]);
1393 cladatum->default_role = le32_to_cpu(buf[1]);
1394 cladatum->default_range = le32_to_cpu(buf[2]);
1395 }
1396
1397 if (p->policyvers >= POLICYDB_VERSION_DEFAULT_TYPE) {
1398 rc = next_entry(buf, fp, sizeof(u32) * 1);
1399 if (rc)
1400 goto bad;
1401 cladatum->default_type = le32_to_cpu(buf[0]);
1402 }
1403
1404 rc = hashtab_insert(h, key, cladatum);
1405 if (rc)
1406 goto bad;
1407
1408 return 0;
1409 bad:
1410 cls_destroy(key, cladatum, NULL);
1411 return rc;
1412 }
1413
1414 static int role_read(struct policydb *p, struct hashtab *h, void *fp)
1415 {
1416 char *key = NULL;
1417 struct role_datum *role;
1418 int rc, to_read = 2;
1419 __le32 buf[3];
1420 u32 len;
1421
1422 rc = -ENOMEM;
1423 role = kzalloc(sizeof(*role), GFP_KERNEL);
1424 if (!role)
1425 goto bad;
1426
1427 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1428 to_read = 3;
1429
1430 rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1431 if (rc)
1432 goto bad;
1433
1434 len = le32_to_cpu(buf[0]);
1435 role->value = le32_to_cpu(buf[1]);
1436 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1437 role->bounds = le32_to_cpu(buf[2]);
1438
1439 rc = str_read(&key, GFP_KERNEL, fp, len);
1440 if (rc)
1441 goto bad;
1442
1443 rc = ebitmap_read(&role->dominates, fp);
1444 if (rc)
1445 goto bad;
1446
1447 rc = ebitmap_read(&role->types, fp);
1448 if (rc)
1449 goto bad;
1450
1451 if (strcmp(key, OBJECT_R) == 0) {
1452 rc = -EINVAL;
1453 if (role->value != OBJECT_R_VAL) {
1454 printk(KERN_ERR "SELinux: Role %s has wrong value %d\n",
1455 OBJECT_R, role->value);
1456 goto bad;
1457 }
1458 rc = 0;
1459 goto bad;
1460 }
1461
1462 rc = hashtab_insert(h, key, role);
1463 if (rc)
1464 goto bad;
1465 return 0;
1466 bad:
1467 role_destroy(key, role, NULL);
1468 return rc;
1469 }
1470
1471 static int type_read(struct policydb *p, struct hashtab *h, void *fp)
1472 {
1473 char *key = NULL;
1474 struct type_datum *typdatum;
1475 int rc, to_read = 3;
1476 __le32 buf[4];
1477 u32 len;
1478
1479 rc = -ENOMEM;
1480 typdatum = kzalloc(sizeof(*typdatum), GFP_KERNEL);
1481 if (!typdatum)
1482 goto bad;
1483
1484 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1485 to_read = 4;
1486
1487 rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1488 if (rc)
1489 goto bad;
1490
1491 len = le32_to_cpu(buf[0]);
1492 typdatum->value = le32_to_cpu(buf[1]);
1493 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) {
1494 u32 prop = le32_to_cpu(buf[2]);
1495
1496 if (prop & TYPEDATUM_PROPERTY_PRIMARY)
1497 typdatum->primary = 1;
1498 if (prop & TYPEDATUM_PROPERTY_ATTRIBUTE)
1499 typdatum->attribute = 1;
1500
1501 typdatum->bounds = le32_to_cpu(buf[3]);
1502 } else {
1503 typdatum->primary = le32_to_cpu(buf[2]);
1504 }
1505
1506 rc = str_read(&key, GFP_KERNEL, fp, len);
1507 if (rc)
1508 goto bad;
1509
1510 rc = hashtab_insert(h, key, typdatum);
1511 if (rc)
1512 goto bad;
1513 return 0;
1514 bad:
1515 type_destroy(key, typdatum, NULL);
1516 return rc;
1517 }
1518
1519
1520 /*
1521 * Read a MLS level structure from a policydb binary
1522 * representation file.
1523 */
1524 static int mls_read_level(struct mls_level *lp, void *fp)
1525 {
1526 __le32 buf[1];
1527 int rc;
1528
1529 memset(lp, 0, sizeof(*lp));
1530
1531 rc = next_entry(buf, fp, sizeof buf);
1532 if (rc) {
1533 printk(KERN_ERR "SELinux: mls: truncated level\n");
1534 return rc;
1535 }
1536 lp->sens = le32_to_cpu(buf[0]);
1537
1538 rc = ebitmap_read(&lp->cat, fp);
1539 if (rc) {
1540 printk(KERN_ERR "SELinux: mls: error reading level categories\n");
1541 return rc;
1542 }
1543 return 0;
1544 }
1545
1546 static int user_read(struct policydb *p, struct hashtab *h, void *fp)
1547 {
1548 char *key = NULL;
1549 struct user_datum *usrdatum;
1550 int rc, to_read = 2;
1551 __le32 buf[3];
1552 u32 len;
1553
1554 rc = -ENOMEM;
1555 usrdatum = kzalloc(sizeof(*usrdatum), GFP_KERNEL);
1556 if (!usrdatum)
1557 goto bad;
1558
1559 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1560 to_read = 3;
1561
1562 rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1563 if (rc)
1564 goto bad;
1565
1566 len = le32_to_cpu(buf[0]);
1567 usrdatum->value = le32_to_cpu(buf[1]);
1568 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1569 usrdatum->bounds = le32_to_cpu(buf[2]);
1570
1571 rc = str_read(&key, GFP_KERNEL, fp, len);
1572 if (rc)
1573 goto bad;
1574
1575 rc = ebitmap_read(&usrdatum->roles, fp);
1576 if (rc)
1577 goto bad;
1578
1579 if (p->policyvers >= POLICYDB_VERSION_MLS) {
1580 rc = mls_read_range_helper(&usrdatum->range, fp);
1581 if (rc)
1582 goto bad;
1583 rc = mls_read_level(&usrdatum->dfltlevel, fp);
1584 if (rc)
1585 goto bad;
1586 }
1587
1588 rc = hashtab_insert(h, key, usrdatum);
1589 if (rc)
1590 goto bad;
1591 return 0;
1592 bad:
1593 user_destroy(key, usrdatum, NULL);
1594 return rc;
1595 }
1596
1597 static int sens_read(struct policydb *p, struct hashtab *h, void *fp)
1598 {
1599 char *key = NULL;
1600 struct level_datum *levdatum;
1601 int rc;
1602 __le32 buf[2];
1603 u32 len;
1604
1605 rc = -ENOMEM;
1606 levdatum = kzalloc(sizeof(*levdatum), GFP_ATOMIC);
1607 if (!levdatum)
1608 goto bad;
1609
1610 rc = next_entry(buf, fp, sizeof buf);
1611 if (rc)
1612 goto bad;
1613
1614 len = le32_to_cpu(buf[0]);
1615 levdatum->isalias = le32_to_cpu(buf[1]);
1616
1617 rc = str_read(&key, GFP_ATOMIC, fp, len);
1618 if (rc)
1619 goto bad;
1620
1621 rc = -ENOMEM;
1622 levdatum->level = kmalloc(sizeof(struct mls_level), GFP_ATOMIC);
1623 if (!levdatum->level)
1624 goto bad;
1625
1626 rc = mls_read_level(levdatum->level, fp);
1627 if (rc)
1628 goto bad;
1629
1630 rc = hashtab_insert(h, key, levdatum);
1631 if (rc)
1632 goto bad;
1633 return 0;
1634 bad:
1635 sens_destroy(key, levdatum, NULL);
1636 return rc;
1637 }
1638
1639 static int cat_read(struct policydb *p, struct hashtab *h, void *fp)
1640 {
1641 char *key = NULL;
1642 struct cat_datum *catdatum;
1643 int rc;
1644 __le32 buf[3];
1645 u32 len;
1646
1647 rc = -ENOMEM;
1648 catdatum = kzalloc(sizeof(*catdatum), GFP_ATOMIC);
1649 if (!catdatum)
1650 goto bad;
1651
1652 rc = next_entry(buf, fp, sizeof buf);
1653 if (rc)
1654 goto bad;
1655
1656 len = le32_to_cpu(buf[0]);
1657 catdatum->value = le32_to_cpu(buf[1]);
1658 catdatum->isalias = le32_to_cpu(buf[2]);
1659
1660 rc = str_read(&key, GFP_ATOMIC, fp, len);
1661 if (rc)
1662 goto bad;
1663
1664 rc = hashtab_insert(h, key, catdatum);
1665 if (rc)
1666 goto bad;
1667 return 0;
1668 bad:
1669 cat_destroy(key, catdatum, NULL);
1670 return rc;
1671 }
1672
1673 static int (*read_f[SYM_NUM]) (struct policydb *p, struct hashtab *h, void *fp) =
1674 {
1675 common_read,
1676 class_read,
1677 role_read,
1678 type_read,
1679 user_read,
1680 cond_read_bool,
1681 sens_read,
1682 cat_read,
1683 };
1684
1685 static int user_bounds_sanity_check(void *key, void *datum, void *datap)
1686 {
1687 struct user_datum *upper, *user;
1688 struct policydb *p = datap;
1689 int depth = 0;
1690
1691 upper = user = datum;
1692 while (upper->bounds) {
1693 struct ebitmap_node *node;
1694 unsigned long bit;
1695
1696 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1697 printk(KERN_ERR "SELinux: user %s: "
1698 "too deep or looped boundary",
1699 (char *) key);
1700 return -EINVAL;
1701 }
1702
1703 upper = p->user_val_to_struct[upper->bounds - 1];
1704 ebitmap_for_each_positive_bit(&user->roles, node, bit) {
1705 if (ebitmap_get_bit(&upper->roles, bit))
1706 continue;
1707
1708 printk(KERN_ERR
1709 "SELinux: boundary violated policy: "
1710 "user=%s role=%s bounds=%s\n",
1711 sym_name(p, SYM_USERS, user->value - 1),
1712 sym_name(p, SYM_ROLES, bit),
1713 sym_name(p, SYM_USERS, upper->value - 1));
1714
1715 return -EINVAL;
1716 }
1717 }
1718
1719 return 0;
1720 }
1721
1722 static int role_bounds_sanity_check(void *key, void *datum, void *datap)
1723 {
1724 struct role_datum *upper, *role;
1725 struct policydb *p = datap;
1726 int depth = 0;
1727
1728 upper = role = datum;
1729 while (upper->bounds) {
1730 struct ebitmap_node *node;
1731 unsigned long bit;
1732
1733 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1734 printk(KERN_ERR "SELinux: role %s: "
1735 "too deep or looped bounds\n",
1736 (char *) key);
1737 return -EINVAL;
1738 }
1739
1740 upper = p->role_val_to_struct[upper->bounds - 1];
1741 ebitmap_for_each_positive_bit(&role->types, node, bit) {
1742 if (ebitmap_get_bit(&upper->types, bit))
1743 continue;
1744
1745 printk(KERN_ERR
1746 "SELinux: boundary violated policy: "
1747 "role=%s type=%s bounds=%s\n",
1748 sym_name(p, SYM_ROLES, role->value - 1),
1749 sym_name(p, SYM_TYPES, bit),
1750 sym_name(p, SYM_ROLES, upper->value - 1));
1751
1752 return -EINVAL;
1753 }
1754 }
1755
1756 return 0;
1757 }
1758
1759 static int type_bounds_sanity_check(void *key, void *datum, void *datap)
1760 {
1761 struct type_datum *upper;
1762 struct policydb *p = datap;
1763 int depth = 0;
1764
1765 upper = datum;
1766 while (upper->bounds) {
1767 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1768 printk(KERN_ERR "SELinux: type %s: "
1769 "too deep or looped boundary\n",
1770 (char *) key);
1771 return -EINVAL;
1772 }
1773
1774 upper = flex_array_get_ptr(p->type_val_to_struct_array,
1775 upper->bounds - 1);
1776 BUG_ON(!upper);
1777
1778 if (upper->attribute) {
1779 printk(KERN_ERR "SELinux: type %s: "
1780 "bounded by attribute %s",
1781 (char *) key,
1782 sym_name(p, SYM_TYPES, upper->value - 1));
1783 return -EINVAL;
1784 }
1785 }
1786
1787 return 0;
1788 }
1789
1790 static int policydb_bounds_sanity_check(struct policydb *p)
1791 {
1792 int rc;
1793
1794 if (p->policyvers < POLICYDB_VERSION_BOUNDARY)
1795 return 0;
1796
1797 rc = hashtab_map(p->p_users.table,
1798 user_bounds_sanity_check, p);
1799 if (rc)
1800 return rc;
1801
1802 rc = hashtab_map(p->p_roles.table,
1803 role_bounds_sanity_check, p);
1804 if (rc)
1805 return rc;
1806
1807 rc = hashtab_map(p->p_types.table,
1808 type_bounds_sanity_check, p);
1809 if (rc)
1810 return rc;
1811
1812 return 0;
1813 }
1814
1815 u16 string_to_security_class(struct policydb *p, const char *name)
1816 {
1817 struct class_datum *cladatum;
1818
1819 cladatum = hashtab_search(p->p_classes.table, name);
1820 if (!cladatum)
1821 return 0;
1822
1823 return cladatum->value;
1824 }
1825
1826 u32 string_to_av_perm(struct policydb *p, u16 tclass, const char *name)
1827 {
1828 struct class_datum *cladatum;
1829 struct perm_datum *perdatum = NULL;
1830 struct common_datum *comdatum;
1831
1832 if (!tclass || tclass > p->p_classes.nprim)
1833 return 0;
1834
1835 cladatum = p->class_val_to_struct[tclass-1];
1836 comdatum = cladatum->comdatum;
1837 if (comdatum)
1838 perdatum = hashtab_search(comdatum->permissions.table,
1839 name);
1840 if (!perdatum)
1841 perdatum = hashtab_search(cladatum->permissions.table,
1842 name);
1843 if (!perdatum)
1844 return 0;
1845
1846 return 1U << (perdatum->value-1);
1847 }
1848
1849 static int range_read(struct policydb *p, void *fp)
1850 {
1851 struct range_trans *rt = NULL;
1852 struct mls_range *r = NULL;
1853 int i, rc;
1854 __le32 buf[2];
1855 u32 nel;
1856
1857 if (p->policyvers < POLICYDB_VERSION_MLS)
1858 return 0;
1859
1860 rc = next_entry(buf, fp, sizeof(u32));
1861 if (rc)
1862 goto out;
1863
1864 nel = le32_to_cpu(buf[0]);
1865 for (i = 0; i < nel; i++) {
1866 rc = -ENOMEM;
1867 rt = kzalloc(sizeof(*rt), GFP_KERNEL);
1868 if (!rt)
1869 goto out;
1870
1871 rc = next_entry(buf, fp, (sizeof(u32) * 2));
1872 if (rc)
1873 goto out;
1874
1875 rt->source_type = le32_to_cpu(buf[0]);
1876 rt->target_type = le32_to_cpu(buf[1]);
1877 if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) {
1878 rc = next_entry(buf, fp, sizeof(u32));
1879 if (rc)
1880 goto out;
1881 rt->target_class = le32_to_cpu(buf[0]);
1882 } else
1883 rt->target_class = p->process_class;
1884
1885 rc = -EINVAL;
1886 if (!policydb_type_isvalid(p, rt->source_type) ||
1887 !policydb_type_isvalid(p, rt->target_type) ||
1888 !policydb_class_isvalid(p, rt->target_class))
1889 goto out;
1890
1891 rc = -ENOMEM;
1892 r = kzalloc(sizeof(*r), GFP_KERNEL);
1893 if (!r)
1894 goto out;
1895
1896 rc = mls_read_range_helper(r, fp);
1897 if (rc)
1898 goto out;
1899
1900 rc = -EINVAL;
1901 if (!mls_range_isvalid(p, r)) {
1902 printk(KERN_WARNING "SELinux: rangetrans: invalid range\n");
1903 goto out;
1904 }
1905
1906 rc = hashtab_insert(p->range_tr, rt, r);
1907 if (rc)
1908 goto out;
1909
1910 rt = NULL;
1911 r = NULL;
1912 }
1913 hash_eval(p->range_tr, "rangetr");
1914 rc = 0;
1915 out:
1916 kfree(rt);
1917 kfree(r);
1918 return rc;
1919 }
1920
1921 static int filename_trans_read(struct policydb *p, void *fp)
1922 {
1923 struct filename_trans *ft;
1924 struct filename_trans_datum *otype;
1925 char *name;
1926 u32 nel, len;
1927 __le32 buf[4];
1928 int rc, i;
1929
1930 if (p->policyvers < POLICYDB_VERSION_FILENAME_TRANS)
1931 return 0;
1932
1933 rc = next_entry(buf, fp, sizeof(u32));
1934 if (rc)
1935 return rc;
1936 nel = le32_to_cpu(buf[0]);
1937
1938 for (i = 0; i < nel; i++) {
1939 ft = NULL;
1940 otype = NULL;
1941 name = NULL;
1942
1943 rc = -ENOMEM;
1944 ft = kzalloc(sizeof(*ft), GFP_KERNEL);
1945 if (!ft)
1946 goto out;
1947
1948 rc = -ENOMEM;
1949 otype = kmalloc(sizeof(*otype), GFP_KERNEL);
1950 if (!otype)
1951 goto out;
1952
1953 /* length of the path component string */
1954 rc = next_entry(buf, fp, sizeof(u32));
1955 if (rc)
1956 goto out;
1957 len = le32_to_cpu(buf[0]);
1958
1959 /* path component string */
1960 rc = str_read(&name, GFP_KERNEL, fp, len);
1961 if (rc)
1962 goto out;
1963
1964 ft->name = name;
1965
1966 rc = next_entry(buf, fp, sizeof(u32) * 4);
1967 if (rc)
1968 goto out;
1969
1970 ft->stype = le32_to_cpu(buf[0]);
1971 ft->ttype = le32_to_cpu(buf[1]);
1972 ft->tclass = le32_to_cpu(buf[2]);
1973
1974 otype->otype = le32_to_cpu(buf[3]);
1975
1976 rc = ebitmap_set_bit(&p->filename_trans_ttypes, ft->ttype, 1);
1977 if (rc)
1978 goto out;
1979
1980 rc = hashtab_insert(p->filename_trans, ft, otype);
1981 if (rc) {
1982 /*
1983 * Do not return -EEXIST to the caller, or the system
1984 * will not boot.
1985 */
1986 if (rc != -EEXIST)
1987 goto out;
1988 /* But free memory to avoid memory leak. */
1989 kfree(ft);
1990 kfree(name);
1991 kfree(otype);
1992 }
1993 }
1994 hash_eval(p->filename_trans, "filenametr");
1995 return 0;
1996 out:
1997 kfree(ft);
1998 kfree(name);
1999 kfree(otype);
2000
2001 return rc;
2002 }
2003
2004 static int genfs_read(struct policydb *p, void *fp)
2005 {
2006 int i, j, rc;
2007 u32 nel, nel2, len, len2;
2008 __le32 buf[1];
2009 struct ocontext *l, *c;
2010 struct ocontext *newc = NULL;
2011 struct genfs *genfs_p, *genfs;
2012 struct genfs *newgenfs = NULL;
2013
2014 rc = next_entry(buf, fp, sizeof(u32));
2015 if (rc)
2016 goto out;
2017 nel = le32_to_cpu(buf[0]);
2018
2019 for (i = 0; i < nel; i++) {
2020 rc = next_entry(buf, fp, sizeof(u32));
2021 if (rc)
2022 goto out;
2023 len = le32_to_cpu(buf[0]);
2024
2025 rc = -ENOMEM;
2026 newgenfs = kzalloc(sizeof(*newgenfs), GFP_KERNEL);
2027 if (!newgenfs)
2028 goto out;
2029
2030 rc = str_read(&newgenfs->fstype, GFP_KERNEL, fp, len);
2031 if (rc)
2032 goto out;
2033
2034 for (genfs_p = NULL, genfs = p->genfs; genfs;
2035 genfs_p = genfs, genfs = genfs->next) {
2036 rc = -EINVAL;
2037 if (strcmp(newgenfs->fstype, genfs->fstype) == 0) {
2038 printk(KERN_ERR "SELinux: dup genfs fstype %s\n",
2039 newgenfs->fstype);
2040 goto out;
2041 }
2042 if (strcmp(newgenfs->fstype, genfs->fstype) < 0)
2043 break;
2044 }
2045 newgenfs->next = genfs;
2046 if (genfs_p)
2047 genfs_p->next = newgenfs;
2048 else
2049 p->genfs = newgenfs;
2050 genfs = newgenfs;
2051 newgenfs = NULL;
2052
2053 rc = next_entry(buf, fp, sizeof(u32));
2054 if (rc)
2055 goto out;
2056
2057 nel2 = le32_to_cpu(buf[0]);
2058 for (j = 0; j < nel2; j++) {
2059 rc = next_entry(buf, fp, sizeof(u32));
2060 if (rc)
2061 goto out;
2062 len = le32_to_cpu(buf[0]);
2063
2064 rc = -ENOMEM;
2065 newc = kzalloc(sizeof(*newc), GFP_KERNEL);
2066 if (!newc)
2067 goto out;
2068
2069 rc = str_read(&newc->u.name, GFP_KERNEL, fp, len);
2070 if (rc)
2071 goto out;
2072
2073 rc = next_entry(buf, fp, sizeof(u32));
2074 if (rc)
2075 goto out;
2076
2077 newc->v.sclass = le32_to_cpu(buf[0]);
2078 rc = context_read_and_validate(&newc->context[0], p, fp);
2079 if (rc)
2080 goto out;
2081
2082 for (l = NULL, c = genfs->head; c;
2083 l = c, c = c->next) {
2084 rc = -EINVAL;
2085 if (!strcmp(newc->u.name, c->u.name) &&
2086 (!c->v.sclass || !newc->v.sclass ||
2087 newc->v.sclass == c->v.sclass)) {
2088 printk(KERN_ERR "SELinux: dup genfs entry (%s,%s)\n",
2089 genfs->fstype, c->u.name);
2090 goto out;
2091 }
2092 len = strlen(newc->u.name);
2093 len2 = strlen(c->u.name);
2094 if (len > len2)
2095 break;
2096 }
2097
2098 newc->next = c;
2099 if (l)
2100 l->next = newc;
2101 else
2102 genfs->head = newc;
2103 newc = NULL;
2104 }
2105 }
2106 rc = 0;
2107 out:
2108 if (newgenfs)
2109 kfree(newgenfs->fstype);
2110 kfree(newgenfs);
2111 ocontext_destroy(newc, OCON_FSUSE);
2112
2113 return rc;
2114 }
2115
2116 static int ocontext_read(struct policydb *p, struct policydb_compat_info *info,
2117 void *fp)
2118 {
2119 int i, j, rc;
2120 u32 nel, len;
2121 __le32 buf[3];
2122 struct ocontext *l, *c;
2123 u32 nodebuf[8];
2124
2125 for (i = 0; i < info->ocon_num; i++) {
2126 rc = next_entry(buf, fp, sizeof(u32));
2127 if (rc)
2128 goto out;
2129 nel = le32_to_cpu(buf[0]);
2130
2131 l = NULL;
2132 for (j = 0; j < nel; j++) {
2133 rc = -ENOMEM;
2134 c = kzalloc(sizeof(*c), GFP_KERNEL);
2135 if (!c)
2136 goto out;
2137 if (l)
2138 l->next = c;
2139 else
2140 p->ocontexts[i] = c;
2141 l = c;
2142
2143 switch (i) {
2144 case OCON_ISID:
2145 rc = next_entry(buf, fp, sizeof(u32));
2146 if (rc)
2147 goto out;
2148
2149 c->sid[0] = le32_to_cpu(buf[0]);
2150 rc = context_read_and_validate(&c->context[0], p, fp);
2151 if (rc)
2152 goto out;
2153 break;
2154 case OCON_FS:
2155 case OCON_NETIF:
2156 rc = next_entry(buf, fp, sizeof(u32));
2157 if (rc)
2158 goto out;
2159 len = le32_to_cpu(buf[0]);
2160
2161 rc = str_read(&c->u.name, GFP_KERNEL, fp, len);
2162 if (rc)
2163 goto out;
2164
2165 rc = context_read_and_validate(&c->context[0], p, fp);
2166 if (rc)
2167 goto out;
2168 rc = context_read_and_validate(&c->context[1], p, fp);
2169 if (rc)
2170 goto out;
2171 break;
2172 case OCON_PORT:
2173 rc = next_entry(buf, fp, sizeof(u32)*3);
2174 if (rc)
2175 goto out;
2176 c->u.port.protocol = le32_to_cpu(buf[0]);
2177 c->u.port.low_port = le32_to_cpu(buf[1]);
2178 c->u.port.high_port = le32_to_cpu(buf[2]);
2179 rc = context_read_and_validate(&c->context[0], p, fp);
2180 if (rc)
2181 goto out;
2182 break;
2183 case OCON_NODE:
2184 rc = next_entry(nodebuf, fp, sizeof(u32) * 2);
2185 if (rc)
2186 goto out;
2187 c->u.node.addr = nodebuf[0]; /* network order */
2188 c->u.node.mask = nodebuf[1]; /* network order */
2189 rc = context_read_and_validate(&c->context[0], p, fp);
2190 if (rc)
2191 goto out;
2192 break;
2193 case OCON_FSUSE:
2194 rc = next_entry(buf, fp, sizeof(u32)*2);
2195 if (rc)
2196 goto out;
2197
2198 rc = -EINVAL;
2199 c->v.behavior = le32_to_cpu(buf[0]);
2200 /* Determined at runtime, not in policy DB. */
2201 if (c->v.behavior == SECURITY_FS_USE_MNTPOINT)
2202 goto out;
2203 if (c->v.behavior > SECURITY_FS_USE_MAX)
2204 goto out;
2205
2206 len = le32_to_cpu(buf[1]);
2207 rc = str_read(&c->u.name, GFP_KERNEL, fp, len);
2208 if (rc)
2209 goto out;
2210
2211 rc = context_read_and_validate(&c->context[0], p, fp);
2212 if (rc)
2213 goto out;
2214 break;
2215 case OCON_NODE6: {
2216 int k;
2217
2218 rc = next_entry(nodebuf, fp, sizeof(u32) * 8);
2219 if (rc)
2220 goto out;
2221 for (k = 0; k < 4; k++)
2222 c->u.node6.addr[k] = nodebuf[k];
2223 for (k = 0; k < 4; k++)
2224 c->u.node6.mask[k] = nodebuf[k+4];
2225 rc = context_read_and_validate(&c->context[0], p, fp);
2226 if (rc)
2227 goto out;
2228 break;
2229 }
2230 }
2231 }
2232 }
2233 rc = 0;
2234 out:
2235 return rc;
2236 }
2237
2238 /*
2239 * Read the configuration data from a policy database binary
2240 * representation file into a policy database structure.
2241 */
2242 int policydb_read(struct policydb *p, void *fp)
2243 {
2244 struct role_allow *ra, *lra;
2245 struct role_trans *tr, *ltr;
2246 int i, j, rc;
2247 __le32 buf[4];
2248 u32 len, nprim, nel;
2249
2250 char *policydb_str;
2251 struct policydb_compat_info *info;
2252
2253 rc = policydb_init(p);
2254 if (rc)
2255 return rc;
2256
2257 /* Read the magic number and string length. */
2258 rc = next_entry(buf, fp, sizeof(u32) * 2);
2259 if (rc)
2260 goto bad;
2261
2262 rc = -EINVAL;
2263 if (le32_to_cpu(buf[0]) != POLICYDB_MAGIC) {
2264 printk(KERN_ERR "SELinux: policydb magic number 0x%x does "
2265 "not match expected magic number 0x%x\n",
2266 le32_to_cpu(buf[0]), POLICYDB_MAGIC);
2267 goto bad;
2268 }
2269
2270 rc = -EINVAL;
2271 len = le32_to_cpu(buf[1]);
2272 if (len != strlen(POLICYDB_STRING)) {
2273 printk(KERN_ERR "SELinux: policydb string length %d does not "
2274 "match expected length %Zu\n",
2275 len, strlen(POLICYDB_STRING));
2276 goto bad;
2277 }
2278
2279 rc = -ENOMEM;
2280 policydb_str = kmalloc(len + 1, GFP_KERNEL);
2281 if (!policydb_str) {
2282 printk(KERN_ERR "SELinux: unable to allocate memory for policydb "
2283 "string of length %d\n", len);
2284 goto bad;
2285 }
2286
2287 rc = next_entry(policydb_str, fp, len);
2288 if (rc) {
2289 printk(KERN_ERR "SELinux: truncated policydb string identifier\n");
2290 kfree(policydb_str);
2291 goto bad;
2292 }
2293
2294 rc = -EINVAL;
2295 policydb_str[len] = '\0';
2296 if (strcmp(policydb_str, POLICYDB_STRING)) {
2297 printk(KERN_ERR "SELinux: policydb string %s does not match "
2298 "my string %s\n", policydb_str, POLICYDB_STRING);
2299 kfree(policydb_str);
2300 goto bad;
2301 }
2302 /* Done with policydb_str. */
2303 kfree(policydb_str);
2304 policydb_str = NULL;
2305
2306 /* Read the version and table sizes. */
2307 rc = next_entry(buf, fp, sizeof(u32)*4);
2308 if (rc)
2309 goto bad;
2310
2311 rc = -EINVAL;
2312 p->policyvers = le32_to_cpu(buf[0]);
2313 if (p->policyvers < POLICYDB_VERSION_MIN ||
2314 p->policyvers > POLICYDB_VERSION_MAX) {
2315 printk(KERN_ERR "SELinux: policydb version %d does not match "
2316 "my version range %d-%d\n",
2317 le32_to_cpu(buf[0]), POLICYDB_VERSION_MIN, POLICYDB_VERSION_MAX);
2318 goto bad;
2319 }
2320
2321 if ((le32_to_cpu(buf[1]) & POLICYDB_CONFIG_MLS)) {
2322 p->mls_enabled = 1;
2323
2324 rc = -EINVAL;
2325 if (p->policyvers < POLICYDB_VERSION_MLS) {
2326 printk(KERN_ERR "SELinux: security policydb version %d "
2327 "(MLS) not backwards compatible\n",
2328 p->policyvers);
2329 goto bad;
2330 }
2331 }
2332 p->reject_unknown = !!(le32_to_cpu(buf[1]) & REJECT_UNKNOWN);
2333 p->allow_unknown = !!(le32_to_cpu(buf[1]) & ALLOW_UNKNOWN);
2334
2335 if (p->policyvers >= POLICYDB_VERSION_POLCAP) {
2336 rc = ebitmap_read(&p->policycaps, fp);
2337 if (rc)
2338 goto bad;
2339 }
2340
2341 if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE) {
2342 rc = ebitmap_read(&p->permissive_map, fp);
2343 if (rc)
2344 goto bad;
2345 }
2346
2347 rc = -EINVAL;
2348 info = policydb_lookup_compat(p->policyvers);
2349 if (!info) {
2350 printk(KERN_ERR "SELinux: unable to find policy compat info "
2351 "for version %d\n", p->policyvers);
2352 goto bad;
2353 }
2354
2355 rc = -EINVAL;
2356 if (le32_to_cpu(buf[2]) != info->sym_num ||
2357 le32_to_cpu(buf[3]) != info->ocon_num) {
2358 printk(KERN_ERR "SELinux: policydb table sizes (%d,%d) do "
2359 "not match mine (%d,%d)\n", le32_to_cpu(buf[2]),
2360 le32_to_cpu(buf[3]),
2361 info->sym_num, info->ocon_num);
2362 goto bad;
2363 }
2364
2365 for (i = 0; i < info->sym_num; i++) {
2366 rc = next_entry(buf, fp, sizeof(u32)*2);
2367 if (rc)
2368 goto bad;
2369 nprim = le32_to_cpu(buf[0]);
2370 nel = le32_to_cpu(buf[1]);
2371 for (j = 0; j < nel; j++) {
2372 rc = read_f[i](p, p->symtab[i].table, fp);
2373 if (rc)
2374 goto bad;
2375 }
2376
2377 p->symtab[i].nprim = nprim;
2378 }
2379
2380 rc = -EINVAL;
2381 p->process_class = string_to_security_class(p, "process");
2382 if (!p->process_class)
2383 goto bad;
2384
2385 rc = avtab_read(&p->te_avtab, fp, p);
2386 if (rc)
2387 goto bad;
2388
2389 if (p->policyvers >= POLICYDB_VERSION_BOOL) {
2390 rc = cond_read_list(p, fp);
2391 if (rc)
2392 goto bad;
2393 }
2394
2395 rc = next_entry(buf, fp, sizeof(u32));
2396 if (rc)
2397 goto bad;
2398 nel = le32_to_cpu(buf[0]);
2399 ltr = NULL;
2400 for (i = 0; i < nel; i++) {
2401 rc = -ENOMEM;
2402 tr = kzalloc(sizeof(*tr), GFP_KERNEL);
2403 if (!tr)
2404 goto bad;
2405 if (ltr)
2406 ltr->next = tr;
2407 else
2408 p->role_tr = tr;
2409 rc = next_entry(buf, fp, sizeof(u32)*3);
2410 if (rc)
2411 goto bad;
2412
2413 rc = -EINVAL;
2414 tr->role = le32_to_cpu(buf[0]);
2415 tr->type = le32_to_cpu(buf[1]);
2416 tr->new_role = le32_to_cpu(buf[2]);
2417 if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) {
2418 rc = next_entry(buf, fp, sizeof(u32));
2419 if (rc)
2420 goto bad;
2421 tr->tclass = le32_to_cpu(buf[0]);
2422 } else
2423 tr->tclass = p->process_class;
2424
2425 rc = -EINVAL;
2426 if (!policydb_role_isvalid(p, tr->role) ||
2427 !policydb_type_isvalid(p, tr->type) ||
2428 !policydb_class_isvalid(p, tr->tclass) ||
2429 !policydb_role_isvalid(p, tr->new_role))
2430 goto bad;
2431 ltr = tr;
2432 }
2433
2434 rc = next_entry(buf, fp, sizeof(u32));
2435 if (rc)
2436 goto bad;
2437 nel = le32_to_cpu(buf[0]);
2438 lra = NULL;
2439 for (i = 0; i < nel; i++) {
2440 rc = -ENOMEM;
2441 ra = kzalloc(sizeof(*ra), GFP_KERNEL);
2442 if (!ra)
2443 goto bad;
2444 if (lra)
2445 lra->next = ra;
2446 else
2447 p->role_allow = ra;
2448 rc = next_entry(buf, fp, sizeof(u32)*2);
2449 if (rc)
2450 goto bad;
2451
2452 rc = -EINVAL;
2453 ra->role = le32_to_cpu(buf[0]);
2454 ra->new_role = le32_to_cpu(buf[1]);
2455 if (!policydb_role_isvalid(p, ra->role) ||
2456 !policydb_role_isvalid(p, ra->new_role))
2457 goto bad;
2458 lra = ra;
2459 }
2460
2461 rc = filename_trans_read(p, fp);
2462 if (rc)
2463 goto bad;
2464
2465 rc = policydb_index(p);
2466 if (rc)
2467 goto bad;
2468
2469 rc = -EINVAL;
2470 p->process_trans_perms = string_to_av_perm(p, p->process_class, "transition");
2471 p->process_trans_perms |= string_to_av_perm(p, p->process_class, "dyntransition");
2472 if (!p->process_trans_perms)
2473 goto bad;
2474
2475 rc = ocontext_read(p, info, fp);
2476 if (rc)
2477 goto bad;
2478
2479 rc = genfs_read(p, fp);
2480 if (rc)
2481 goto bad;
2482
2483 rc = range_read(p, fp);
2484 if (rc)
2485 goto bad;
2486
2487 rc = -ENOMEM;
2488 p->type_attr_map_array = flex_array_alloc(sizeof(struct ebitmap),
2489 p->p_types.nprim,
2490 GFP_KERNEL | __GFP_ZERO);
2491 if (!p->type_attr_map_array)
2492 goto bad;
2493
2494 /* preallocate so we don't have to worry about the put ever failing */
2495 rc = flex_array_prealloc(p->type_attr_map_array, 0, p->p_types.nprim,
2496 GFP_KERNEL | __GFP_ZERO);
2497 if (rc)
2498 goto bad;
2499
2500 for (i = 0; i < p->p_types.nprim; i++) {
2501 struct ebitmap *e = flex_array_get(p->type_attr_map_array, i);
2502
2503 BUG_ON(!e);
2504 ebitmap_init(e);
2505 if (p->policyvers >= POLICYDB_VERSION_AVTAB) {
2506 rc = ebitmap_read(e, fp);
2507 if (rc)
2508 goto bad;
2509 }
2510 /* add the type itself as the degenerate case */
2511 rc = ebitmap_set_bit(e, i, 1);
2512 if (rc)
2513 goto bad;
2514 }
2515
2516 rc = policydb_bounds_sanity_check(p);
2517 if (rc)
2518 goto bad;
2519
2520 rc = 0;
2521 out:
2522 return rc;
2523 bad:
2524 policydb_destroy(p);
2525 goto out;
2526 }
2527
2528 /*
2529 * Write a MLS level structure to a policydb binary
2530 * representation file.
2531 */
2532 static int mls_write_level(struct mls_level *l, void *fp)
2533 {
2534 __le32 buf[1];
2535 int rc;
2536
2537 buf[0] = cpu_to_le32(l->sens);
2538 rc = put_entry(buf, sizeof(u32), 1, fp);
2539 if (rc)
2540 return rc;
2541
2542 rc = ebitmap_write(&l->cat, fp);
2543 if (rc)
2544 return rc;
2545
2546 return 0;
2547 }
2548
2549 /*
2550 * Write a MLS range structure to a policydb binary
2551 * representation file.
2552 */
2553 static int mls_write_range_helper(struct mls_range *r, void *fp)
2554 {
2555 __le32 buf[3];
2556 size_t items;
2557 int rc, eq;
2558
2559 eq = mls_level_eq(&r->level[1], &r->level[0]);
2560
2561 if (eq)
2562 items = 2;
2563 else
2564 items = 3;
2565 buf[0] = cpu_to_le32(items-1);
2566 buf[1] = cpu_to_le32(r->level[0].sens);
2567 if (!eq)
2568 buf[2] = cpu_to_le32(r->level[1].sens);
2569
2570 BUG_ON(items > ARRAY_SIZE(buf));
2571
2572 rc = put_entry(buf, sizeof(u32), items, fp);
2573 if (rc)
2574 return rc;
2575
2576 rc = ebitmap_write(&r->level[0].cat, fp);
2577 if (rc)
2578 return rc;
2579 if (!eq) {
2580 rc = ebitmap_write(&r->level[1].cat, fp);
2581 if (rc)
2582 return rc;
2583 }
2584
2585 return 0;
2586 }
2587
2588 static int sens_write(void *vkey, void *datum, void *ptr)
2589 {
2590 char *key = vkey;
2591 struct level_datum *levdatum = datum;
2592 struct policy_data *pd = ptr;
2593 void *fp = pd->fp;
2594 __le32 buf[2];
2595 size_t len;
2596 int rc;
2597
2598 len = strlen(key);
2599 buf[0] = cpu_to_le32(len);
2600 buf[1] = cpu_to_le32(levdatum->isalias);
2601 rc = put_entry(buf, sizeof(u32), 2, fp);
2602 if (rc)
2603 return rc;
2604
2605 rc = put_entry(key, 1, len, fp);
2606 if (rc)
2607 return rc;
2608
2609 rc = mls_write_level(levdatum->level, fp);
2610 if (rc)
2611 return rc;
2612
2613 return 0;
2614 }
2615
2616 static int cat_write(void *vkey, void *datum, void *ptr)
2617 {
2618 char *key = vkey;
2619 struct cat_datum *catdatum = datum;
2620 struct policy_data *pd = ptr;
2621 void *fp = pd->fp;
2622 __le32 buf[3];
2623 size_t len;
2624 int rc;
2625
2626 len = strlen(key);
2627 buf[0] = cpu_to_le32(len);
2628 buf[1] = cpu_to_le32(catdatum->value);
2629 buf[2] = cpu_to_le32(catdatum->isalias);
2630 rc = put_entry(buf, sizeof(u32), 3, fp);
2631 if (rc)
2632 return rc;
2633
2634 rc = put_entry(key, 1, len, fp);
2635 if (rc)
2636 return rc;
2637
2638 return 0;
2639 }
2640
2641 static int role_trans_write(struct policydb *p, void *fp)
2642 {
2643 struct role_trans *r = p->role_tr;
2644 struct role_trans *tr;
2645 u32 buf[3];
2646 size_t nel;
2647 int rc;
2648
2649 nel = 0;
2650 for (tr = r; tr; tr = tr->next)
2651 nel++;
2652 buf[0] = cpu_to_le32(nel);
2653 rc = put_entry(buf, sizeof(u32), 1, fp);
2654 if (rc)
2655 return rc;
2656 for (tr = r; tr; tr = tr->next) {
2657 buf[0] = cpu_to_le32(tr->role);
2658 buf[1] = cpu_to_le32(tr->type);
2659 buf[2] = cpu_to_le32(tr->new_role);
2660 rc = put_entry(buf, sizeof(u32), 3, fp);
2661 if (rc)
2662 return rc;
2663 if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) {
2664 buf[0] = cpu_to_le32(tr->tclass);
2665 rc = put_entry(buf, sizeof(u32), 1, fp);
2666 if (rc)
2667 return rc;
2668 }
2669 }
2670
2671 return 0;
2672 }
2673
2674 static int role_allow_write(struct role_allow *r, void *fp)
2675 {
2676 struct role_allow *ra;
2677 u32 buf[2];
2678 size_t nel;
2679 int rc;
2680
2681 nel = 0;
2682 for (ra = r; ra; ra = ra->next)
2683 nel++;
2684 buf[0] = cpu_to_le32(nel);
2685 rc = put_entry(buf, sizeof(u32), 1, fp);
2686 if (rc)
2687 return rc;
2688 for (ra = r; ra; ra = ra->next) {
2689 buf[0] = cpu_to_le32(ra->role);
2690 buf[1] = cpu_to_le32(ra->new_role);
2691 rc = put_entry(buf, sizeof(u32), 2, fp);
2692 if (rc)
2693 return rc;
2694 }
2695 return 0;
2696 }
2697
2698 /*
2699 * Write a security context structure
2700 * to a policydb binary representation file.
2701 */
2702 static int context_write(struct policydb *p, struct context *c,
2703 void *fp)
2704 {
2705 int rc;
2706 __le32 buf[3];
2707
2708 buf[0] = cpu_to_le32(c->user);
2709 buf[1] = cpu_to_le32(c->role);
2710 buf[2] = cpu_to_le32(c->type);
2711
2712 rc = put_entry(buf, sizeof(u32), 3, fp);
2713 if (rc)
2714 return rc;
2715
2716 rc = mls_write_range_helper(&c->range, fp);
2717 if (rc)
2718 return rc;
2719
2720 return 0;
2721 }
2722
2723 /*
2724 * The following *_write functions are used to
2725 * write the symbol data to a policy database
2726 * binary representation file.
2727 */
2728
2729 static int perm_write(void *vkey, void *datum, void *fp)
2730 {
2731 char *key = vkey;
2732 struct perm_datum *perdatum = datum;
2733 __le32 buf[2];
2734 size_t len;
2735 int rc;
2736
2737 len = strlen(key);
2738 buf[0] = cpu_to_le32(len);
2739 buf[1] = cpu_to_le32(perdatum->value);
2740 rc = put_entry(buf, sizeof(u32), 2, fp);
2741 if (rc)
2742 return rc;
2743
2744 rc = put_entry(key, 1, len, fp);
2745 if (rc)
2746 return rc;
2747
2748 return 0;
2749 }
2750
2751 static int common_write(void *vkey, void *datum, void *ptr)
2752 {
2753 char *key = vkey;
2754 struct common_datum *comdatum = datum;
2755 struct policy_data *pd = ptr;
2756 void *fp = pd->fp;
2757 __le32 buf[4];
2758 size_t len;
2759 int rc;
2760
2761 len = strlen(key);
2762 buf[0] = cpu_to_le32(len);
2763 buf[1] = cpu_to_le32(comdatum->value);
2764 buf[2] = cpu_to_le32(comdatum->permissions.nprim);
2765 buf[3] = cpu_to_le32(comdatum->permissions.table->nel);
2766 rc = put_entry(buf, sizeof(u32), 4, fp);
2767 if (rc)
2768 return rc;
2769
2770 rc = put_entry(key, 1, len, fp);
2771 if (rc)
2772 return rc;
2773
2774 rc = hashtab_map(comdatum->permissions.table, perm_write, fp);
2775 if (rc)
2776 return rc;
2777
2778 return 0;
2779 }
2780
2781 static int type_set_write(struct type_set *t, void *fp)
2782 {
2783 int rc;
2784 __le32 buf[1];
2785
2786 if (ebitmap_write(&t->types, fp))
2787 return -EINVAL;
2788 if (ebitmap_write(&t->negset, fp))
2789 return -EINVAL;
2790
2791 buf[0] = cpu_to_le32(t->flags);
2792 rc = put_entry(buf, sizeof(u32), 1, fp);
2793 if (rc)
2794 return -EINVAL;
2795
2796 return 0;
2797 }
2798
2799 static int write_cons_helper(struct policydb *p, struct constraint_node *node,
2800 void *fp)
2801 {
2802 struct constraint_node *c;
2803 struct constraint_expr *e;
2804 __le32 buf[3];
2805 u32 nel;
2806 int rc;
2807
2808 for (c = node; c; c = c->next) {
2809 nel = 0;
2810 for (e = c->expr; e; e = e->next)
2811 nel++;
2812 buf[0] = cpu_to_le32(c->permissions);
2813 buf[1] = cpu_to_le32(nel);
2814 rc = put_entry(buf, sizeof(u32), 2, fp);
2815 if (rc)
2816 return rc;
2817 for (e = c->expr; e; e = e->next) {
2818 buf[0] = cpu_to_le32(e->expr_type);
2819 buf[1] = cpu_to_le32(e->attr);
2820 buf[2] = cpu_to_le32(e->op);
2821 rc = put_entry(buf, sizeof(u32), 3, fp);
2822 if (rc)
2823 return rc;
2824
2825 switch (e->expr_type) {
2826 case CEXPR_NAMES:
2827 rc = ebitmap_write(&e->names, fp);
2828 if (rc)
2829 return rc;
2830 if (p->policyvers >=
2831 POLICYDB_VERSION_CONSTRAINT_NAMES) {
2832 rc = type_set_write(e->type_names, fp);
2833 if (rc)
2834 return rc;
2835 }
2836 break;
2837 default:
2838 break;
2839 }
2840 }
2841 }
2842
2843 return 0;
2844 }
2845
2846 static int class_write(void *vkey, void *datum, void *ptr)
2847 {
2848 char *key = vkey;
2849 struct class_datum *cladatum = datum;
2850 struct policy_data *pd = ptr;
2851 void *fp = pd->fp;
2852 struct policydb *p = pd->p;
2853 struct constraint_node *c;
2854 __le32 buf[6];
2855 u32 ncons;
2856 size_t len, len2;
2857 int rc;
2858
2859 len = strlen(key);
2860 if (cladatum->comkey)
2861 len2 = strlen(cladatum->comkey);
2862 else
2863 len2 = 0;
2864
2865 ncons = 0;
2866 for (c = cladatum->constraints; c; c = c->next)
2867 ncons++;
2868
2869 buf[0] = cpu_to_le32(len);
2870 buf[1] = cpu_to_le32(len2);
2871 buf[2] = cpu_to_le32(cladatum->value);
2872 buf[3] = cpu_to_le32(cladatum->permissions.nprim);
2873 if (cladatum->permissions.table)
2874 buf[4] = cpu_to_le32(cladatum->permissions.table->nel);
2875 else
2876 buf[4] = 0;
2877 buf[5] = cpu_to_le32(ncons);
2878 rc = put_entry(buf, sizeof(u32), 6, fp);
2879 if (rc)
2880 return rc;
2881
2882 rc = put_entry(key, 1, len, fp);
2883 if (rc)
2884 return rc;
2885
2886 if (cladatum->comkey) {
2887 rc = put_entry(cladatum->comkey, 1, len2, fp);
2888 if (rc)
2889 return rc;
2890 }
2891
2892 rc = hashtab_map(cladatum->permissions.table, perm_write, fp);
2893 if (rc)
2894 return rc;
2895
2896 rc = write_cons_helper(p, cladatum->constraints, fp);
2897 if (rc)
2898 return rc;
2899
2900 /* write out the validatetrans rule */
2901 ncons = 0;
2902 for (c = cladatum->validatetrans; c; c = c->next)
2903 ncons++;
2904
2905 buf[0] = cpu_to_le32(ncons);
2906 rc = put_entry(buf, sizeof(u32), 1, fp);
2907 if (rc)
2908 return rc;
2909
2910 rc = write_cons_helper(p, cladatum->validatetrans, fp);
2911 if (rc)
2912 return rc;
2913
2914 if (p->policyvers >= POLICYDB_VERSION_NEW_OBJECT_DEFAULTS) {
2915 buf[0] = cpu_to_le32(cladatum->default_user);
2916 buf[1] = cpu_to_le32(cladatum->default_role);
2917 buf[2] = cpu_to_le32(cladatum->default_range);
2918
2919 rc = put_entry(buf, sizeof(uint32_t), 3, fp);
2920 if (rc)
2921 return rc;
2922 }
2923
2924 if (p->policyvers >= POLICYDB_VERSION_DEFAULT_TYPE) {
2925 buf[0] = cpu_to_le32(cladatum->default_type);
2926 rc = put_entry(buf, sizeof(uint32_t), 1, fp);
2927 if (rc)
2928 return rc;
2929 }
2930
2931 return 0;
2932 }
2933
2934 static int role_write(void *vkey, void *datum, void *ptr)
2935 {
2936 char *key = vkey;
2937 struct role_datum *role = datum;
2938 struct policy_data *pd = ptr;
2939 void *fp = pd->fp;
2940 struct policydb *p = pd->p;
2941 __le32 buf[3];
2942 size_t items, len;
2943 int rc;
2944
2945 len = strlen(key);
2946 items = 0;
2947 buf[items++] = cpu_to_le32(len);
2948 buf[items++] = cpu_to_le32(role->value);
2949 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
2950 buf[items++] = cpu_to_le32(role->bounds);
2951
2952 BUG_ON(items > ARRAY_SIZE(buf));
2953
2954 rc = put_entry(buf, sizeof(u32), items, fp);
2955 if (rc)
2956 return rc;
2957
2958 rc = put_entry(key, 1, len, fp);
2959 if (rc)
2960 return rc;
2961
2962 rc = ebitmap_write(&role->dominates, fp);
2963 if (rc)
2964 return rc;
2965
2966 rc = ebitmap_write(&role->types, fp);
2967 if (rc)
2968 return rc;
2969
2970 return 0;
2971 }
2972
2973 static int type_write(void *vkey, void *datum, void *ptr)
2974 {
2975 char *key = vkey;
2976 struct type_datum *typdatum = datum;
2977 struct policy_data *pd = ptr;
2978 struct policydb *p = pd->p;
2979 void *fp = pd->fp;
2980 __le32 buf[4];
2981 int rc;
2982 size_t items, len;
2983
2984 len = strlen(key);
2985 items = 0;
2986 buf[items++] = cpu_to_le32(len);
2987 buf[items++] = cpu_to_le32(typdatum->value);
2988 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) {
2989 u32 properties = 0;
2990
2991 if (typdatum->primary)
2992 properties |= TYPEDATUM_PROPERTY_PRIMARY;
2993
2994 if (typdatum->attribute)
2995 properties |= TYPEDATUM_PROPERTY_ATTRIBUTE;
2996
2997 buf[items++] = cpu_to_le32(properties);
2998 buf[items++] = cpu_to_le32(typdatum->bounds);
2999 } else {
3000 buf[items++] = cpu_to_le32(typdatum->primary);
3001 }
3002 BUG_ON(items > ARRAY_SIZE(buf));
3003 rc = put_entry(buf, sizeof(u32), items, fp);
3004 if (rc)
3005 return rc;
3006
3007 rc = put_entry(key, 1, len, fp);
3008 if (rc)
3009 return rc;
3010
3011 return 0;
3012 }
3013
3014 static int user_write(void *vkey, void *datum, void *ptr)
3015 {
3016 char *key = vkey;
3017 struct user_datum *usrdatum = datum;
3018 struct policy_data *pd = ptr;
3019 struct policydb *p = pd->p;
3020 void *fp = pd->fp;
3021 __le32 buf[3];
3022 size_t items, len;
3023 int rc;
3024
3025 len = strlen(key);
3026 items = 0;
3027 buf[items++] = cpu_to_le32(len);
3028 buf[items++] = cpu_to_le32(usrdatum->value);
3029 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
3030 buf[items++] = cpu_to_le32(usrdatum->bounds);
3031 BUG_ON(items > ARRAY_SIZE(buf));
3032 rc = put_entry(buf, sizeof(u32), items, fp);
3033 if (rc)
3034 return rc;
3035
3036 rc = put_entry(key, 1, len, fp);
3037 if (rc)
3038 return rc;
3039
3040 rc = ebitmap_write(&usrdatum->roles, fp);
3041 if (rc)
3042 return rc;
3043
3044 rc = mls_write_range_helper(&usrdatum->range, fp);
3045 if (rc)
3046 return rc;
3047
3048 rc = mls_write_level(&usrdatum->dfltlevel, fp);
3049 if (rc)
3050 return rc;
3051
3052 return 0;
3053 }
3054
3055 static int (*write_f[SYM_NUM]) (void *key, void *datum,
3056 void *datap) =
3057 {
3058 common_write,
3059 class_write,
3060 role_write,
3061 type_write,
3062 user_write,
3063 cond_write_bool,
3064 sens_write,
3065 cat_write,
3066 };
3067
3068 static int ocontext_write(struct policydb *p, struct policydb_compat_info *info,
3069 void *fp)
3070 {
3071 unsigned int i, j, rc;
3072 size_t nel, len;
3073 __le32 buf[3];
3074 u32 nodebuf[8];
3075 struct ocontext *c;
3076 for (i = 0; i < info->ocon_num; i++) {
3077 nel = 0;
3078 for (c = p->ocontexts[i]; c; c = c->next)
3079 nel++;
3080 buf[0] = cpu_to_le32(nel);
3081 rc = put_entry(buf, sizeof(u32), 1, fp);
3082 if (rc)
3083 return rc;
3084 for (c = p->ocontexts[i]; c; c = c->next) {
3085 switch (i) {
3086 case OCON_ISID:
3087 buf[0] = cpu_to_le32(c->sid[0]);
3088 rc = put_entry(buf, sizeof(u32), 1, fp);
3089 if (rc)
3090 return rc;
3091 rc = context_write(p, &c->context[0], fp);
3092 if (rc)
3093 return rc;
3094 break;
3095 case OCON_FS:
3096 case OCON_NETIF:
3097 len = strlen(c->u.name);
3098 buf[0] = cpu_to_le32(len);
3099 rc = put_entry(buf, sizeof(u32), 1, fp);
3100 if (rc)
3101 return rc;
3102 rc = put_entry(c->u.name, 1, len, fp);
3103 if (rc)
3104 return rc;
3105 rc = context_write(p, &c->context[0], fp);
3106 if (rc)
3107 return rc;
3108 rc = context_write(p, &c->context[1], fp);
3109 if (rc)
3110 return rc;
3111 break;
3112 case OCON_PORT:
3113 buf[0] = cpu_to_le32(c->u.port.protocol);
3114 buf[1] = cpu_to_le32(c->u.port.low_port);
3115 buf[2] = cpu_to_le32(c->u.port.high_port);
3116 rc = put_entry(buf, sizeof(u32), 3, fp);
3117 if (rc)
3118 return rc;
3119 rc = context_write(p, &c->context[0], fp);
3120 if (rc)
3121 return rc;
3122 break;
3123 case OCON_NODE:
3124 nodebuf[0] = c->u.node.addr; /* network order */
3125 nodebuf[1] = c->u.node.mask; /* network order */
3126 rc = put_entry(nodebuf, sizeof(u32), 2, fp);
3127 if (rc)
3128 return rc;
3129 rc = context_write(p, &c->context[0], fp);
3130 if (rc)
3131 return rc;
3132 break;
3133 case OCON_FSUSE:
3134 buf[0] = cpu_to_le32(c->v.behavior);
3135 len = strlen(c->u.name);
3136 buf[1] = cpu_to_le32(len);
3137 rc = put_entry(buf, sizeof(u32), 2, fp);
3138 if (rc)
3139 return rc;
3140 rc = put_entry(c->u.name, 1, len, fp);
3141 if (rc)
3142 return rc;
3143 rc = context_write(p, &c->context[0], fp);
3144 if (rc)
3145 return rc;
3146 break;
3147 case OCON_NODE6:
3148 for (j = 0; j < 4; j++)
3149 nodebuf[j] = c->u.node6.addr[j]; /* network order */
3150 for (j = 0; j < 4; j++)
3151 nodebuf[j + 4] = c->u.node6.mask[j]; /* network order */
3152 rc = put_entry(nodebuf, sizeof(u32), 8, fp);
3153 if (rc)
3154 return rc;
3155 rc = context_write(p, &c->context[0], fp);
3156 if (rc)
3157 return rc;
3158 break;
3159 }
3160 }
3161 }
3162 return 0;
3163 }
3164
3165 static int genfs_write(struct policydb *p, void *fp)
3166 {
3167 struct genfs *genfs;
3168 struct ocontext *c;
3169 size_t len;
3170 __le32 buf[1];
3171 int rc;
3172
3173 len = 0;
3174 for (genfs = p->genfs; genfs; genfs = genfs->next)
3175 len++;
3176 buf[0] = cpu_to_le32(len);
3177 rc = put_entry(buf, sizeof(u32), 1, fp);
3178 if (rc)
3179 return rc;
3180 for (genfs = p->genfs; genfs; genfs = genfs->next) {
3181 len = strlen(genfs->fstype);
3182 buf[0] = cpu_to_le32(len);
3183 rc = put_entry(buf, sizeof(u32), 1, fp);
3184 if (rc)
3185 return rc;
3186 rc = put_entry(genfs->fstype, 1, len, fp);
3187 if (rc)
3188 return rc;
3189 len = 0;
3190 for (c = genfs->head; c; c = c->next)
3191 len++;
3192 buf[0] = cpu_to_le32(len);
3193 rc = put_entry(buf, sizeof(u32), 1, fp);
3194 if (rc)
3195 return rc;
3196 for (c = genfs->head; c; c = c->next) {
3197 len = strlen(c->u.name);
3198 buf[0] = cpu_to_le32(len);
3199 rc = put_entry(buf, sizeof(u32), 1, fp);
3200 if (rc)
3201 return rc;
3202 rc = put_entry(c->u.name, 1, len, fp);
3203 if (rc)
3204 return rc;
3205 buf[0] = cpu_to_le32(c->v.sclass);
3206 rc = put_entry(buf, sizeof(u32), 1, fp);
3207 if (rc)
3208 return rc;
3209 rc = context_write(p, &c->context[0], fp);
3210 if (rc)
3211 return rc;
3212 }
3213 }
3214 return 0;
3215 }
3216
3217 static int hashtab_cnt(void *key, void *data, void *ptr)
3218 {
3219 int *cnt = ptr;
3220 *cnt = *cnt + 1;
3221
3222 return 0;
3223 }
3224
3225 static int range_write_helper(void *key, void *data, void *ptr)
3226 {
3227 __le32 buf[2];
3228 struct range_trans *rt = key;
3229 struct mls_range *r = data;
3230 struct policy_data *pd = ptr;
3231 void *fp = pd->fp;
3232 struct policydb *p = pd->p;
3233 int rc;
3234
3235 buf[0] = cpu_to_le32(rt->source_type);
3236 buf[1] = cpu_to_le32(rt->target_type);
3237 rc = put_entry(buf, sizeof(u32), 2, fp);
3238 if (rc)
3239 return rc;
3240 if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) {
3241 buf[0] = cpu_to_le32(rt->target_class);
3242 rc = put_entry(buf, sizeof(u32), 1, fp);
3243 if (rc)
3244 return rc;
3245 }
3246 rc = mls_write_range_helper(r, fp);
3247 if (rc)
3248 return rc;
3249
3250 return 0;
3251 }
3252
3253 static int range_write(struct policydb *p, void *fp)
3254 {
3255 __le32 buf[1];
3256 int rc, nel;
3257 struct policy_data pd;
3258
3259 pd.p = p;
3260 pd.fp = fp;
3261
3262 /* count the number of entries in the hashtab */
3263 nel = 0;
3264 rc = hashtab_map(p->range_tr, hashtab_cnt, &nel);
3265 if (rc)
3266 return rc;
3267
3268 buf[0] = cpu_to_le32(nel);
3269 rc = put_entry(buf, sizeof(u32), 1, fp);
3270 if (rc)
3271 return rc;
3272
3273 /* actually write all of the entries */
3274 rc = hashtab_map(p->range_tr, range_write_helper, &pd);
3275 if (rc)
3276 return rc;
3277
3278 return 0;
3279 }
3280
3281 static int filename_write_helper(void *key, void *data, void *ptr)
3282 {
3283 __le32 buf[4];
3284 struct filename_trans *ft = key;
3285 struct filename_trans_datum *otype = data;
3286 void *fp = ptr;
3287 int rc;
3288 u32 len;
3289
3290 len = strlen(ft->name);
3291 buf[0] = cpu_to_le32(len);
3292 rc = put_entry(buf, sizeof(u32), 1, fp);
3293 if (rc)
3294 return rc;
3295
3296 rc = put_entry(ft->name, sizeof(char), len, fp);
3297 if (rc)
3298 return rc;
3299
3300 buf[0] = cpu_to_le32(ft->stype);
3301 buf[1] = cpu_to_le32(ft->ttype);
3302 buf[2] = cpu_to_le32(ft->tclass);
3303 buf[3] = cpu_to_le32(otype->otype);
3304
3305 rc = put_entry(buf, sizeof(u32), 4, fp);
3306 if (rc)
3307 return rc;
3308
3309 return 0;
3310 }
3311
3312 static int filename_trans_write(struct policydb *p, void *fp)
3313 {
3314 u32 nel;
3315 __le32 buf[1];
3316 int rc;
3317
3318 if (p->policyvers < POLICYDB_VERSION_FILENAME_TRANS)
3319 return 0;
3320
3321 nel = 0;
3322 rc = hashtab_map(p->filename_trans, hashtab_cnt, &nel);
3323 if (rc)
3324 return rc;
3325
3326 buf[0] = cpu_to_le32(nel);
3327 rc = put_entry(buf, sizeof(u32), 1, fp);
3328 if (rc)
3329 return rc;
3330
3331 rc = hashtab_map(p->filename_trans, filename_write_helper, fp);
3332 if (rc)
3333 return rc;
3334
3335 return 0;
3336 }
3337
3338 /*
3339 * Write the configuration data in a policy database
3340 * structure to a policy database binary representation
3341 * file.
3342 */
3343 int policydb_write(struct policydb *p, void *fp)
3344 {
3345 unsigned int i, num_syms;
3346 int rc;
3347 __le32 buf[4];
3348 u32 config;
3349 size_t len;
3350 struct policydb_compat_info *info;
3351
3352 /*
3353 * refuse to write policy older than compressed avtab
3354 * to simplify the writer. There are other tests dropped
3355 * since we assume this throughout the writer code. Be
3356 * careful if you ever try to remove this restriction
3357 */
3358 if (p->policyvers < POLICYDB_VERSION_AVTAB) {
3359 printk(KERN_ERR "SELinux: refusing to write policy version %d."
3360 " Because it is less than version %d\n", p->policyvers,
3361 POLICYDB_VERSION_AVTAB);
3362 return -EINVAL;
3363 }
3364
3365 config = 0;
3366 if (p->mls_enabled)
3367 config |= POLICYDB_CONFIG_MLS;
3368
3369 if (p->reject_unknown)
3370 config |= REJECT_UNKNOWN;
3371 if (p->allow_unknown)
3372 config |= ALLOW_UNKNOWN;
3373
3374 /* Write the magic number and string identifiers. */
3375 buf[0] = cpu_to_le32(POLICYDB_MAGIC);
3376 len = strlen(POLICYDB_STRING);
3377 buf[1] = cpu_to_le32(len);
3378 rc = put_entry(buf, sizeof(u32), 2, fp);
3379 if (rc)
3380 return rc;
3381 rc = put_entry(POLICYDB_STRING, 1, len, fp);
3382 if (rc)
3383 return rc;
3384
3385 /* Write the version, config, and table sizes. */
3386 info = policydb_lookup_compat(p->policyvers);
3387 if (!info) {
3388 printk(KERN_ERR "SELinux: compatibility lookup failed for policy "
3389 "version %d", p->policyvers);
3390 return -EINVAL;
3391 }
3392
3393 buf[0] = cpu_to_le32(p->policyvers);
3394 buf[1] = cpu_to_le32(config);
3395 buf[2] = cpu_to_le32(info->sym_num);
3396 buf[3] = cpu_to_le32(info->ocon_num);
3397
3398 rc = put_entry(buf, sizeof(u32), 4, fp);
3399 if (rc)
3400 return rc;
3401
3402 if (p->policyvers >= POLICYDB_VERSION_POLCAP) {
3403 rc = ebitmap_write(&p->policycaps, fp);
3404 if (rc)
3405 return rc;
3406 }
3407
3408 if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE) {
3409 rc = ebitmap_write(&p->permissive_map, fp);
3410 if (rc)
3411 return rc;
3412 }
3413
3414 num_syms = info->sym_num;
3415 for (i = 0; i < num_syms; i++) {
3416 struct policy_data pd;
3417
3418 pd.fp = fp;
3419 pd.p = p;
3420
3421 buf[0] = cpu_to_le32(p->symtab[i].nprim);
3422 buf[1] = cpu_to_le32(p->symtab[i].table->nel);
3423
3424 rc = put_entry(buf, sizeof(u32), 2, fp);
3425 if (rc)
3426 return rc;
3427 rc = hashtab_map(p->symtab[i].table, write_f[i], &pd);
3428 if (rc)
3429 return rc;
3430 }
3431
3432 rc = avtab_write(p, &p->te_avtab, fp);
3433 if (rc)
3434 return rc;
3435
3436 rc = cond_write_list(p, p->cond_list, fp);
3437 if (rc)
3438 return rc;
3439
3440 rc = role_trans_write(p, fp);
3441 if (rc)
3442 return rc;
3443
3444 rc = role_allow_write(p->role_allow, fp);
3445 if (rc)
3446 return rc;
3447
3448 rc = filename_trans_write(p, fp);
3449 if (rc)
3450 return rc;
3451
3452 rc = ocontext_write(p, info, fp);
3453 if (rc)
3454 return rc;
3455
3456 rc = genfs_write(p, fp);
3457 if (rc)
3458 return rc;
3459
3460 rc = range_write(p, fp);
3461 if (rc)
3462 return rc;
3463
3464 for (i = 0; i < p->p_types.nprim; i++) {
3465 struct ebitmap *e = flex_array_get(p->type_attr_map_array, i);
3466
3467 BUG_ON(!e);
3468 rc = ebitmap_write(e, fp);
3469 if (rc)
3470 return rc;
3471 }
3472
3473 return 0;
3474 }
Linux with added FPC-III support