Commit | Line | Data |
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1da177e4 LT |
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 | * Copyright (C) 2004-2005 Trusted Computer Solutions, Inc. | |
17 | * Copyright (C) 2003 - 2004 Tresys Technology, LLC | |
18 | * This program is free software; you can redistribute it and/or modify | |
19 | * it under the terms of the GNU General Public License as published by | |
20 | * the Free Software Foundation, version 2. | |
21 | */ | |
22 | ||
23 | #include <linux/kernel.h> | |
24 | #include <linux/slab.h> | |
25 | #include <linux/string.h> | |
26 | #include <linux/errno.h> | |
27 | #include "security.h" | |
28 | ||
29 | #include "policydb.h" | |
30 | #include "conditional.h" | |
31 | #include "mls.h" | |
32 | ||
33 | #define _DEBUG_HASHES | |
34 | ||
35 | #ifdef DEBUG_HASHES | |
36 | static char *symtab_name[SYM_NUM] = { | |
37 | "common prefixes", | |
38 | "classes", | |
39 | "roles", | |
40 | "types", | |
41 | "users", | |
42 | "bools", | |
43 | "levels", | |
44 | "categories", | |
45 | }; | |
46 | #endif | |
47 | ||
48 | int selinux_mls_enabled = 0; | |
49 | ||
50 | static unsigned int symtab_sizes[SYM_NUM] = { | |
51 | 2, | |
52 | 32, | |
53 | 16, | |
54 | 512, | |
55 | 128, | |
56 | 16, | |
57 | 16, | |
58 | 16, | |
59 | }; | |
60 | ||
61 | struct policydb_compat_info { | |
62 | int version; | |
63 | int sym_num; | |
64 | int ocon_num; | |
65 | }; | |
66 | ||
67 | /* These need to be updated if SYM_NUM or OCON_NUM changes */ | |
68 | static struct policydb_compat_info policydb_compat[] = { | |
69 | { | |
70 | .version = POLICYDB_VERSION_BASE, | |
71 | .sym_num = SYM_NUM - 3, | |
72 | .ocon_num = OCON_NUM - 1, | |
73 | }, | |
74 | { | |
75 | .version = POLICYDB_VERSION_BOOL, | |
76 | .sym_num = SYM_NUM - 2, | |
77 | .ocon_num = OCON_NUM - 1, | |
78 | }, | |
79 | { | |
80 | .version = POLICYDB_VERSION_IPV6, | |
81 | .sym_num = SYM_NUM - 2, | |
82 | .ocon_num = OCON_NUM, | |
83 | }, | |
84 | { | |
85 | .version = POLICYDB_VERSION_NLCLASS, | |
86 | .sym_num = SYM_NUM - 2, | |
87 | .ocon_num = OCON_NUM, | |
88 | }, | |
89 | { | |
90 | .version = POLICYDB_VERSION_MLS, | |
91 | .sym_num = SYM_NUM, | |
92 | .ocon_num = OCON_NUM, | |
93 | }, | |
782ebb99 SS |
94 | { |
95 | .version = POLICYDB_VERSION_AVTAB, | |
96 | .sym_num = SYM_NUM, | |
97 | .ocon_num = OCON_NUM, | |
98 | }, | |
1da177e4 LT |
99 | }; |
100 | ||
101 | static struct policydb_compat_info *policydb_lookup_compat(int version) | |
102 | { | |
103 | int i; | |
104 | struct policydb_compat_info *info = NULL; | |
105 | ||
32725ad8 | 106 | for (i = 0; i < ARRAY_SIZE(policydb_compat); i++) { |
1da177e4 LT |
107 | if (policydb_compat[i].version == version) { |
108 | info = &policydb_compat[i]; | |
109 | break; | |
110 | } | |
111 | } | |
112 | return info; | |
113 | } | |
114 | ||
115 | /* | |
116 | * Initialize the role table. | |
117 | */ | |
118 | static int roles_init(struct policydb *p) | |
119 | { | |
120 | char *key = NULL; | |
121 | int rc; | |
122 | struct role_datum *role; | |
123 | ||
89d155ef | 124 | role = kzalloc(sizeof(*role), GFP_KERNEL); |
1da177e4 LT |
125 | if (!role) { |
126 | rc = -ENOMEM; | |
127 | goto out; | |
128 | } | |
1da177e4 LT |
129 | role->value = ++p->p_roles.nprim; |
130 | if (role->value != OBJECT_R_VAL) { | |
131 | rc = -EINVAL; | |
132 | goto out_free_role; | |
133 | } | |
134 | key = kmalloc(strlen(OBJECT_R)+1,GFP_KERNEL); | |
135 | if (!key) { | |
136 | rc = -ENOMEM; | |
137 | goto out_free_role; | |
138 | } | |
139 | strcpy(key, OBJECT_R); | |
140 | rc = hashtab_insert(p->p_roles.table, key, role); | |
141 | if (rc) | |
142 | goto out_free_key; | |
143 | out: | |
144 | return rc; | |
145 | ||
146 | out_free_key: | |
147 | kfree(key); | |
148 | out_free_role: | |
149 | kfree(role); | |
150 | goto out; | |
151 | } | |
152 | ||
153 | /* | |
154 | * Initialize a policy database structure. | |
155 | */ | |
156 | static int policydb_init(struct policydb *p) | |
157 | { | |
158 | int i, rc; | |
159 | ||
160 | memset(p, 0, sizeof(*p)); | |
161 | ||
162 | for (i = 0; i < SYM_NUM; i++) { | |
163 | rc = symtab_init(&p->symtab[i], symtab_sizes[i]); | |
164 | if (rc) | |
165 | goto out_free_symtab; | |
166 | } | |
167 | ||
168 | rc = avtab_init(&p->te_avtab); | |
169 | if (rc) | |
170 | goto out_free_symtab; | |
171 | ||
172 | rc = roles_init(p); | |
173 | if (rc) | |
174 | goto out_free_avtab; | |
175 | ||
176 | rc = cond_policydb_init(p); | |
177 | if (rc) | |
178 | goto out_free_avtab; | |
179 | ||
180 | out: | |
181 | return rc; | |
182 | ||
183 | out_free_avtab: | |
184 | avtab_destroy(&p->te_avtab); | |
185 | ||
186 | out_free_symtab: | |
187 | for (i = 0; i < SYM_NUM; i++) | |
188 | hashtab_destroy(p->symtab[i].table); | |
189 | goto out; | |
190 | } | |
191 | ||
192 | /* | |
193 | * The following *_index functions are used to | |
194 | * define the val_to_name and val_to_struct arrays | |
195 | * in a policy database structure. The val_to_name | |
196 | * arrays are used when converting security context | |
197 | * structures into string representations. The | |
198 | * val_to_struct arrays are used when the attributes | |
199 | * of a class, role, or user are needed. | |
200 | */ | |
201 | ||
202 | static int common_index(void *key, void *datum, void *datap) | |
203 | { | |
204 | struct policydb *p; | |
205 | struct common_datum *comdatum; | |
206 | ||
207 | comdatum = datum; | |
208 | p = datap; | |
209 | if (!comdatum->value || comdatum->value > p->p_commons.nprim) | |
210 | return -EINVAL; | |
211 | p->p_common_val_to_name[comdatum->value - 1] = key; | |
212 | return 0; | |
213 | } | |
214 | ||
215 | static int class_index(void *key, void *datum, void *datap) | |
216 | { | |
217 | struct policydb *p; | |
218 | struct class_datum *cladatum; | |
219 | ||
220 | cladatum = datum; | |
221 | p = datap; | |
222 | if (!cladatum->value || cladatum->value > p->p_classes.nprim) | |
223 | return -EINVAL; | |
224 | p->p_class_val_to_name[cladatum->value - 1] = key; | |
225 | p->class_val_to_struct[cladatum->value - 1] = cladatum; | |
226 | return 0; | |
227 | } | |
228 | ||
229 | static int role_index(void *key, void *datum, void *datap) | |
230 | { | |
231 | struct policydb *p; | |
232 | struct role_datum *role; | |
233 | ||
234 | role = datum; | |
235 | p = datap; | |
236 | if (!role->value || role->value > p->p_roles.nprim) | |
237 | return -EINVAL; | |
238 | p->p_role_val_to_name[role->value - 1] = key; | |
239 | p->role_val_to_struct[role->value - 1] = role; | |
240 | return 0; | |
241 | } | |
242 | ||
243 | static int type_index(void *key, void *datum, void *datap) | |
244 | { | |
245 | struct policydb *p; | |
246 | struct type_datum *typdatum; | |
247 | ||
248 | typdatum = datum; | |
249 | p = datap; | |
250 | ||
251 | if (typdatum->primary) { | |
252 | if (!typdatum->value || typdatum->value > p->p_types.nprim) | |
253 | return -EINVAL; | |
254 | p->p_type_val_to_name[typdatum->value - 1] = key; | |
255 | } | |
256 | ||
257 | return 0; | |
258 | } | |
259 | ||
260 | static int user_index(void *key, void *datum, void *datap) | |
261 | { | |
262 | struct policydb *p; | |
263 | struct user_datum *usrdatum; | |
264 | ||
265 | usrdatum = datum; | |
266 | p = datap; | |
267 | if (!usrdatum->value || usrdatum->value > p->p_users.nprim) | |
268 | return -EINVAL; | |
269 | p->p_user_val_to_name[usrdatum->value - 1] = key; | |
270 | p->user_val_to_struct[usrdatum->value - 1] = usrdatum; | |
271 | return 0; | |
272 | } | |
273 | ||
274 | static int sens_index(void *key, void *datum, void *datap) | |
275 | { | |
276 | struct policydb *p; | |
277 | struct level_datum *levdatum; | |
278 | ||
279 | levdatum = datum; | |
280 | p = datap; | |
281 | ||
282 | if (!levdatum->isalias) { | |
283 | if (!levdatum->level->sens || | |
284 | levdatum->level->sens > p->p_levels.nprim) | |
285 | return -EINVAL; | |
286 | p->p_sens_val_to_name[levdatum->level->sens - 1] = key; | |
287 | } | |
288 | ||
289 | return 0; | |
290 | } | |
291 | ||
292 | static int cat_index(void *key, void *datum, void *datap) | |
293 | { | |
294 | struct policydb *p; | |
295 | struct cat_datum *catdatum; | |
296 | ||
297 | catdatum = datum; | |
298 | p = datap; | |
299 | ||
300 | if (!catdatum->isalias) { | |
301 | if (!catdatum->value || catdatum->value > p->p_cats.nprim) | |
302 | return -EINVAL; | |
303 | p->p_cat_val_to_name[catdatum->value - 1] = key; | |
304 | } | |
305 | ||
306 | return 0; | |
307 | } | |
308 | ||
309 | static int (*index_f[SYM_NUM]) (void *key, void *datum, void *datap) = | |
310 | { | |
311 | common_index, | |
312 | class_index, | |
313 | role_index, | |
314 | type_index, | |
315 | user_index, | |
316 | cond_index_bool, | |
317 | sens_index, | |
318 | cat_index, | |
319 | }; | |
320 | ||
321 | /* | |
322 | * Define the common val_to_name array and the class | |
323 | * val_to_name and val_to_struct arrays in a policy | |
324 | * database structure. | |
325 | * | |
326 | * Caller must clean up upon failure. | |
327 | */ | |
328 | static int policydb_index_classes(struct policydb *p) | |
329 | { | |
330 | int rc; | |
331 | ||
332 | p->p_common_val_to_name = | |
333 | kmalloc(p->p_commons.nprim * sizeof(char *), GFP_KERNEL); | |
334 | if (!p->p_common_val_to_name) { | |
335 | rc = -ENOMEM; | |
336 | goto out; | |
337 | } | |
338 | ||
339 | rc = hashtab_map(p->p_commons.table, common_index, p); | |
340 | if (rc) | |
341 | goto out; | |
342 | ||
343 | p->class_val_to_struct = | |
344 | kmalloc(p->p_classes.nprim * sizeof(*(p->class_val_to_struct)), GFP_KERNEL); | |
345 | if (!p->class_val_to_struct) { | |
346 | rc = -ENOMEM; | |
347 | goto out; | |
348 | } | |
349 | ||
350 | p->p_class_val_to_name = | |
351 | kmalloc(p->p_classes.nprim * sizeof(char *), GFP_KERNEL); | |
352 | if (!p->p_class_val_to_name) { | |
353 | rc = -ENOMEM; | |
354 | goto out; | |
355 | } | |
356 | ||
357 | rc = hashtab_map(p->p_classes.table, class_index, p); | |
358 | out: | |
359 | return rc; | |
360 | } | |
361 | ||
362 | #ifdef DEBUG_HASHES | |
363 | static void symtab_hash_eval(struct symtab *s) | |
364 | { | |
365 | int i; | |
366 | ||
367 | for (i = 0; i < SYM_NUM; i++) { | |
368 | struct hashtab *h = s[i].table; | |
369 | struct hashtab_info info; | |
370 | ||
371 | hashtab_stat(h, &info); | |
372 | printk(KERN_INFO "%s: %d entries and %d/%d buckets used, " | |
373 | "longest chain length %d\n", symtab_name[i], h->nel, | |
374 | info.slots_used, h->size, info.max_chain_len); | |
375 | } | |
376 | } | |
377 | #endif | |
378 | ||
379 | /* | |
380 | * Define the other val_to_name and val_to_struct arrays | |
381 | * in a policy database structure. | |
382 | * | |
383 | * Caller must clean up on failure. | |
384 | */ | |
385 | static int policydb_index_others(struct policydb *p) | |
386 | { | |
387 | int i, rc = 0; | |
388 | ||
389 | printk(KERN_INFO "security: %d users, %d roles, %d types, %d bools", | |
390 | p->p_users.nprim, p->p_roles.nprim, p->p_types.nprim, p->p_bools.nprim); | |
391 | if (selinux_mls_enabled) | |
392 | printk(", %d sens, %d cats", p->p_levels.nprim, | |
393 | p->p_cats.nprim); | |
394 | printk("\n"); | |
395 | ||
396 | printk(KERN_INFO "security: %d classes, %d rules\n", | |
397 | p->p_classes.nprim, p->te_avtab.nel); | |
398 | ||
399 | #ifdef DEBUG_HASHES | |
400 | avtab_hash_eval(&p->te_avtab, "rules"); | |
401 | symtab_hash_eval(p->symtab); | |
402 | #endif | |
403 | ||
404 | p->role_val_to_struct = | |
405 | kmalloc(p->p_roles.nprim * sizeof(*(p->role_val_to_struct)), | |
406 | GFP_KERNEL); | |
407 | if (!p->role_val_to_struct) { | |
408 | rc = -ENOMEM; | |
409 | goto out; | |
410 | } | |
411 | ||
412 | p->user_val_to_struct = | |
413 | kmalloc(p->p_users.nprim * sizeof(*(p->user_val_to_struct)), | |
414 | GFP_KERNEL); | |
415 | if (!p->user_val_to_struct) { | |
416 | rc = -ENOMEM; | |
417 | goto out; | |
418 | } | |
419 | ||
420 | if (cond_init_bool_indexes(p)) { | |
421 | rc = -ENOMEM; | |
422 | goto out; | |
423 | } | |
424 | ||
425 | for (i = SYM_ROLES; i < SYM_NUM; i++) { | |
426 | p->sym_val_to_name[i] = | |
427 | kmalloc(p->symtab[i].nprim * sizeof(char *), GFP_KERNEL); | |
428 | if (!p->sym_val_to_name[i]) { | |
429 | rc = -ENOMEM; | |
430 | goto out; | |
431 | } | |
432 | rc = hashtab_map(p->symtab[i].table, index_f[i], p); | |
433 | if (rc) | |
434 | goto out; | |
435 | } | |
436 | ||
437 | out: | |
438 | return rc; | |
439 | } | |
440 | ||
441 | /* | |
442 | * The following *_destroy functions are used to | |
443 | * free any memory allocated for each kind of | |
444 | * symbol data in the policy database. | |
445 | */ | |
446 | ||
447 | static int perm_destroy(void *key, void *datum, void *p) | |
448 | { | |
449 | kfree(key); | |
450 | kfree(datum); | |
451 | return 0; | |
452 | } | |
453 | ||
454 | static int common_destroy(void *key, void *datum, void *p) | |
455 | { | |
456 | struct common_datum *comdatum; | |
457 | ||
458 | kfree(key); | |
459 | comdatum = datum; | |
460 | hashtab_map(comdatum->permissions.table, perm_destroy, NULL); | |
461 | hashtab_destroy(comdatum->permissions.table); | |
462 | kfree(datum); | |
463 | return 0; | |
464 | } | |
465 | ||
466 | static int class_destroy(void *key, void *datum, void *p) | |
467 | { | |
468 | struct class_datum *cladatum; | |
469 | struct constraint_node *constraint, *ctemp; | |
470 | struct constraint_expr *e, *etmp; | |
471 | ||
472 | kfree(key); | |
473 | cladatum = datum; | |
474 | hashtab_map(cladatum->permissions.table, perm_destroy, NULL); | |
475 | hashtab_destroy(cladatum->permissions.table); | |
476 | constraint = cladatum->constraints; | |
477 | while (constraint) { | |
478 | e = constraint->expr; | |
479 | while (e) { | |
480 | ebitmap_destroy(&e->names); | |
481 | etmp = e; | |
482 | e = e->next; | |
483 | kfree(etmp); | |
484 | } | |
485 | ctemp = constraint; | |
486 | constraint = constraint->next; | |
487 | kfree(ctemp); | |
488 | } | |
489 | ||
490 | constraint = cladatum->validatetrans; | |
491 | while (constraint) { | |
492 | e = constraint->expr; | |
493 | while (e) { | |
494 | ebitmap_destroy(&e->names); | |
495 | etmp = e; | |
496 | e = e->next; | |
497 | kfree(etmp); | |
498 | } | |
499 | ctemp = constraint; | |
500 | constraint = constraint->next; | |
501 | kfree(ctemp); | |
502 | } | |
503 | ||
504 | kfree(cladatum->comkey); | |
505 | kfree(datum); | |
506 | return 0; | |
507 | } | |
508 | ||
509 | static int role_destroy(void *key, void *datum, void *p) | |
510 | { | |
511 | struct role_datum *role; | |
512 | ||
513 | kfree(key); | |
514 | role = datum; | |
515 | ebitmap_destroy(&role->dominates); | |
516 | ebitmap_destroy(&role->types); | |
517 | kfree(datum); | |
518 | return 0; | |
519 | } | |
520 | ||
521 | static int type_destroy(void *key, void *datum, void *p) | |
522 | { | |
523 | kfree(key); | |
524 | kfree(datum); | |
525 | return 0; | |
526 | } | |
527 | ||
528 | static int user_destroy(void *key, void *datum, void *p) | |
529 | { | |
530 | struct user_datum *usrdatum; | |
531 | ||
532 | kfree(key); | |
533 | usrdatum = datum; | |
534 | ebitmap_destroy(&usrdatum->roles); | |
535 | ebitmap_destroy(&usrdatum->range.level[0].cat); | |
536 | ebitmap_destroy(&usrdatum->range.level[1].cat); | |
537 | ebitmap_destroy(&usrdatum->dfltlevel.cat); | |
538 | kfree(datum); | |
539 | return 0; | |
540 | } | |
541 | ||
542 | static int sens_destroy(void *key, void *datum, void *p) | |
543 | { | |
544 | struct level_datum *levdatum; | |
545 | ||
546 | kfree(key); | |
547 | levdatum = datum; | |
548 | ebitmap_destroy(&levdatum->level->cat); | |
549 | kfree(levdatum->level); | |
550 | kfree(datum); | |
551 | return 0; | |
552 | } | |
553 | ||
554 | static int cat_destroy(void *key, void *datum, void *p) | |
555 | { | |
556 | kfree(key); | |
557 | kfree(datum); | |
558 | return 0; | |
559 | } | |
560 | ||
561 | static int (*destroy_f[SYM_NUM]) (void *key, void *datum, void *datap) = | |
562 | { | |
563 | common_destroy, | |
564 | class_destroy, | |
565 | role_destroy, | |
566 | type_destroy, | |
567 | user_destroy, | |
568 | cond_destroy_bool, | |
569 | sens_destroy, | |
570 | cat_destroy, | |
571 | }; | |
572 | ||
573 | static void ocontext_destroy(struct ocontext *c, int i) | |
574 | { | |
575 | context_destroy(&c->context[0]); | |
576 | context_destroy(&c->context[1]); | |
577 | if (i == OCON_ISID || i == OCON_FS || | |
578 | i == OCON_NETIF || i == OCON_FSUSE) | |
579 | kfree(c->u.name); | |
580 | kfree(c); | |
581 | } | |
582 | ||
583 | /* | |
584 | * Free any memory allocated by a policy database structure. | |
585 | */ | |
586 | void policydb_destroy(struct policydb *p) | |
587 | { | |
588 | struct ocontext *c, *ctmp; | |
589 | struct genfs *g, *gtmp; | |
590 | int i; | |
782ebb99 SS |
591 | struct role_allow *ra, *lra = NULL; |
592 | struct role_trans *tr, *ltr = NULL; | |
593 | struct range_trans *rt, *lrt = NULL; | |
1da177e4 LT |
594 | |
595 | for (i = 0; i < SYM_NUM; i++) { | |
596 | hashtab_map(p->symtab[i].table, destroy_f[i], NULL); | |
597 | hashtab_destroy(p->symtab[i].table); | |
598 | } | |
599 | ||
9a5f04bf JJ |
600 | for (i = 0; i < SYM_NUM; i++) |
601 | kfree(p->sym_val_to_name[i]); | |
1da177e4 | 602 | |
9a5f04bf JJ |
603 | kfree(p->class_val_to_struct); |
604 | kfree(p->role_val_to_struct); | |
605 | kfree(p->user_val_to_struct); | |
1da177e4 LT |
606 | |
607 | avtab_destroy(&p->te_avtab); | |
608 | ||
609 | for (i = 0; i < OCON_NUM; i++) { | |
610 | c = p->ocontexts[i]; | |
611 | while (c) { | |
612 | ctmp = c; | |
613 | c = c->next; | |
614 | ocontext_destroy(ctmp,i); | |
615 | } | |
616 | } | |
617 | ||
618 | g = p->genfs; | |
619 | while (g) { | |
620 | kfree(g->fstype); | |
621 | c = g->head; | |
622 | while (c) { | |
623 | ctmp = c; | |
624 | c = c->next; | |
625 | ocontext_destroy(ctmp,OCON_FSUSE); | |
626 | } | |
627 | gtmp = g; | |
628 | g = g->next; | |
629 | kfree(gtmp); | |
630 | } | |
631 | ||
632 | cond_policydb_destroy(p); | |
633 | ||
782ebb99 | 634 | for (tr = p->role_tr; tr; tr = tr->next) { |
a7f988ba | 635 | kfree(ltr); |
782ebb99 SS |
636 | ltr = tr; |
637 | } | |
a7f988ba | 638 | kfree(ltr); |
782ebb99 SS |
639 | |
640 | for (ra = p->role_allow; ra; ra = ra -> next) { | |
a7f988ba | 641 | kfree(lra); |
782ebb99 SS |
642 | lra = ra; |
643 | } | |
a7f988ba | 644 | kfree(lra); |
782ebb99 SS |
645 | |
646 | for (rt = p->range_tr; rt; rt = rt -> next) { | |
ddccef3b DG |
647 | if (lrt) { |
648 | ebitmap_destroy(&lrt->range.level[0].cat); | |
649 | ebitmap_destroy(&lrt->range.level[1].cat); | |
650 | kfree(lrt); | |
651 | } | |
782ebb99 SS |
652 | lrt = rt; |
653 | } | |
ddccef3b DG |
654 | if (lrt) { |
655 | ebitmap_destroy(&lrt->range.level[0].cat); | |
656 | ebitmap_destroy(&lrt->range.level[1].cat); | |
657 | kfree(lrt); | |
658 | } | |
782ebb99 | 659 | |
282c1f5e SS |
660 | if (p->type_attr_map) { |
661 | for (i = 0; i < p->p_types.nprim; i++) | |
662 | ebitmap_destroy(&p->type_attr_map[i]); | |
663 | } | |
782ebb99 SS |
664 | kfree(p->type_attr_map); |
665 | ||
1da177e4 LT |
666 | return; |
667 | } | |
668 | ||
669 | /* | |
670 | * Load the initial SIDs specified in a policy database | |
671 | * structure into a SID table. | |
672 | */ | |
673 | int policydb_load_isids(struct policydb *p, struct sidtab *s) | |
674 | { | |
675 | struct ocontext *head, *c; | |
676 | int rc; | |
677 | ||
678 | rc = sidtab_init(s); | |
679 | if (rc) { | |
680 | printk(KERN_ERR "security: out of memory on SID table init\n"); | |
681 | goto out; | |
682 | } | |
683 | ||
684 | head = p->ocontexts[OCON_ISID]; | |
685 | for (c = head; c; c = c->next) { | |
686 | if (!c->context[0].user) { | |
687 | printk(KERN_ERR "security: SID %s was never " | |
688 | "defined.\n", c->u.name); | |
689 | rc = -EINVAL; | |
690 | goto out; | |
691 | } | |
692 | if (sidtab_insert(s, c->sid[0], &c->context[0])) { | |
693 | printk(KERN_ERR "security: unable to load initial " | |
694 | "SID %s.\n", c->u.name); | |
695 | rc = -EINVAL; | |
696 | goto out; | |
697 | } | |
698 | } | |
699 | out: | |
700 | return rc; | |
701 | } | |
702 | ||
703 | /* | |
704 | * Return 1 if the fields in the security context | |
705 | * structure `c' are valid. Return 0 otherwise. | |
706 | */ | |
707 | int policydb_context_isvalid(struct policydb *p, struct context *c) | |
708 | { | |
709 | struct role_datum *role; | |
710 | struct user_datum *usrdatum; | |
711 | ||
712 | if (!c->role || c->role > p->p_roles.nprim) | |
713 | return 0; | |
714 | ||
715 | if (!c->user || c->user > p->p_users.nprim) | |
716 | return 0; | |
717 | ||
718 | if (!c->type || c->type > p->p_types.nprim) | |
719 | return 0; | |
720 | ||
721 | if (c->role != OBJECT_R_VAL) { | |
722 | /* | |
723 | * Role must be authorized for the type. | |
724 | */ | |
725 | role = p->role_val_to_struct[c->role - 1]; | |
726 | if (!ebitmap_get_bit(&role->types, | |
727 | c->type - 1)) | |
728 | /* role may not be associated with type */ | |
729 | return 0; | |
730 | ||
731 | /* | |
732 | * User must be authorized for the role. | |
733 | */ | |
734 | usrdatum = p->user_val_to_struct[c->user - 1]; | |
735 | if (!usrdatum) | |
736 | return 0; | |
737 | ||
738 | if (!ebitmap_get_bit(&usrdatum->roles, | |
739 | c->role - 1)) | |
740 | /* user may not be associated with role */ | |
741 | return 0; | |
742 | } | |
743 | ||
744 | if (!mls_context_isvalid(p, c)) | |
745 | return 0; | |
746 | ||
747 | return 1; | |
748 | } | |
749 | ||
750 | /* | |
751 | * Read a MLS range structure from a policydb binary | |
752 | * representation file. | |
753 | */ | |
754 | static int mls_read_range_helper(struct mls_range *r, void *fp) | |
755 | { | |
b5bf6c55 AD |
756 | __le32 buf[2]; |
757 | u32 items; | |
1da177e4 LT |
758 | int rc; |
759 | ||
760 | rc = next_entry(buf, fp, sizeof(u32)); | |
761 | if (rc < 0) | |
762 | goto out; | |
763 | ||
764 | items = le32_to_cpu(buf[0]); | |
765 | if (items > ARRAY_SIZE(buf)) { | |
766 | printk(KERN_ERR "security: mls: range overflow\n"); | |
767 | rc = -EINVAL; | |
768 | goto out; | |
769 | } | |
770 | rc = next_entry(buf, fp, sizeof(u32) * items); | |
771 | if (rc < 0) { | |
772 | printk(KERN_ERR "security: mls: truncated range\n"); | |
773 | goto out; | |
774 | } | |
775 | r->level[0].sens = le32_to_cpu(buf[0]); | |
776 | if (items > 1) | |
777 | r->level[1].sens = le32_to_cpu(buf[1]); | |
778 | else | |
779 | r->level[1].sens = r->level[0].sens; | |
780 | ||
781 | rc = ebitmap_read(&r->level[0].cat, fp); | |
782 | if (rc) { | |
783 | printk(KERN_ERR "security: mls: error reading low " | |
784 | "categories\n"); | |
785 | goto out; | |
786 | } | |
787 | if (items > 1) { | |
788 | rc = ebitmap_read(&r->level[1].cat, fp); | |
789 | if (rc) { | |
790 | printk(KERN_ERR "security: mls: error reading high " | |
791 | "categories\n"); | |
792 | goto bad_high; | |
793 | } | |
794 | } else { | |
795 | rc = ebitmap_cpy(&r->level[1].cat, &r->level[0].cat); | |
796 | if (rc) { | |
797 | printk(KERN_ERR "security: mls: out of memory\n"); | |
798 | goto bad_high; | |
799 | } | |
800 | } | |
801 | ||
802 | rc = 0; | |
803 | out: | |
804 | return rc; | |
805 | bad_high: | |
806 | ebitmap_destroy(&r->level[0].cat); | |
807 | goto out; | |
808 | } | |
809 | ||
810 | /* | |
811 | * Read and validate a security context structure | |
812 | * from a policydb binary representation file. | |
813 | */ | |
814 | static int context_read_and_validate(struct context *c, | |
815 | struct policydb *p, | |
816 | void *fp) | |
817 | { | |
b5bf6c55 | 818 | __le32 buf[3]; |
1da177e4 LT |
819 | int rc; |
820 | ||
821 | rc = next_entry(buf, fp, sizeof buf); | |
822 | if (rc < 0) { | |
823 | printk(KERN_ERR "security: context truncated\n"); | |
824 | goto out; | |
825 | } | |
826 | c->user = le32_to_cpu(buf[0]); | |
827 | c->role = le32_to_cpu(buf[1]); | |
828 | c->type = le32_to_cpu(buf[2]); | |
829 | if (p->policyvers >= POLICYDB_VERSION_MLS) { | |
830 | if (mls_read_range_helper(&c->range, fp)) { | |
831 | printk(KERN_ERR "security: error reading MLS range of " | |
832 | "context\n"); | |
833 | rc = -EINVAL; | |
834 | goto out; | |
835 | } | |
836 | } | |
837 | ||
838 | if (!policydb_context_isvalid(p, c)) { | |
839 | printk(KERN_ERR "security: invalid security context\n"); | |
840 | context_destroy(c); | |
841 | rc = -EINVAL; | |
842 | } | |
843 | out: | |
844 | return rc; | |
845 | } | |
846 | ||
847 | /* | |
848 | * The following *_read functions are used to | |
849 | * read the symbol data from a policy database | |
850 | * binary representation file. | |
851 | */ | |
852 | ||
853 | static int perm_read(struct policydb *p, struct hashtab *h, void *fp) | |
854 | { | |
855 | char *key = NULL; | |
856 | struct perm_datum *perdatum; | |
857 | int rc; | |
b5bf6c55 AD |
858 | __le32 buf[2]; |
859 | u32 len; | |
1da177e4 | 860 | |
89d155ef | 861 | perdatum = kzalloc(sizeof(*perdatum), GFP_KERNEL); |
1da177e4 LT |
862 | if (!perdatum) { |
863 | rc = -ENOMEM; | |
864 | goto out; | |
865 | } | |
1da177e4 LT |
866 | |
867 | rc = next_entry(buf, fp, sizeof buf); | |
868 | if (rc < 0) | |
869 | goto bad; | |
870 | ||
871 | len = le32_to_cpu(buf[0]); | |
872 | perdatum->value = le32_to_cpu(buf[1]); | |
873 | ||
874 | key = kmalloc(len + 1,GFP_KERNEL); | |
875 | if (!key) { | |
876 | rc = -ENOMEM; | |
877 | goto bad; | |
878 | } | |
879 | rc = next_entry(key, fp, len); | |
880 | if (rc < 0) | |
881 | goto bad; | |
882 | key[len] = 0; | |
883 | ||
884 | rc = hashtab_insert(h, key, perdatum); | |
885 | if (rc) | |
886 | goto bad; | |
887 | out: | |
888 | return rc; | |
889 | bad: | |
890 | perm_destroy(key, perdatum, NULL); | |
891 | goto out; | |
892 | } | |
893 | ||
894 | static int common_read(struct policydb *p, struct hashtab *h, void *fp) | |
895 | { | |
896 | char *key = NULL; | |
897 | struct common_datum *comdatum; | |
b5bf6c55 AD |
898 | __le32 buf[4]; |
899 | u32 len, nel; | |
1da177e4 LT |
900 | int i, rc; |
901 | ||
89d155ef | 902 | comdatum = kzalloc(sizeof(*comdatum), GFP_KERNEL); |
1da177e4 LT |
903 | if (!comdatum) { |
904 | rc = -ENOMEM; | |
905 | goto out; | |
906 | } | |
1da177e4 LT |
907 | |
908 | rc = next_entry(buf, fp, sizeof buf); | |
909 | if (rc < 0) | |
910 | goto bad; | |
911 | ||
912 | len = le32_to_cpu(buf[0]); | |
913 | comdatum->value = le32_to_cpu(buf[1]); | |
914 | ||
915 | rc = symtab_init(&comdatum->permissions, PERM_SYMTAB_SIZE); | |
916 | if (rc) | |
917 | goto bad; | |
918 | comdatum->permissions.nprim = le32_to_cpu(buf[2]); | |
919 | nel = le32_to_cpu(buf[3]); | |
920 | ||
921 | key = kmalloc(len + 1,GFP_KERNEL); | |
922 | if (!key) { | |
923 | rc = -ENOMEM; | |
924 | goto bad; | |
925 | } | |
926 | rc = next_entry(key, fp, len); | |
927 | if (rc < 0) | |
928 | goto bad; | |
929 | key[len] = 0; | |
930 | ||
931 | for (i = 0; i < nel; i++) { | |
932 | rc = perm_read(p, comdatum->permissions.table, fp); | |
933 | if (rc) | |
934 | goto bad; | |
935 | } | |
936 | ||
937 | rc = hashtab_insert(h, key, comdatum); | |
938 | if (rc) | |
939 | goto bad; | |
940 | out: | |
941 | return rc; | |
942 | bad: | |
943 | common_destroy(key, comdatum, NULL); | |
944 | goto out; | |
945 | } | |
946 | ||
947 | static int read_cons_helper(struct constraint_node **nodep, int ncons, | |
948 | int allowxtarget, void *fp) | |
949 | { | |
950 | struct constraint_node *c, *lc; | |
951 | struct constraint_expr *e, *le; | |
b5bf6c55 AD |
952 | __le32 buf[3]; |
953 | u32 nexpr; | |
1da177e4 LT |
954 | int rc, i, j, depth; |
955 | ||
956 | lc = NULL; | |
957 | for (i = 0; i < ncons; i++) { | |
89d155ef | 958 | c = kzalloc(sizeof(*c), GFP_KERNEL); |
1da177e4 LT |
959 | if (!c) |
960 | return -ENOMEM; | |
1da177e4 LT |
961 | |
962 | if (lc) { | |
963 | lc->next = c; | |
964 | } else { | |
965 | *nodep = c; | |
966 | } | |
967 | ||
968 | rc = next_entry(buf, fp, (sizeof(u32) * 2)); | |
969 | if (rc < 0) | |
970 | return rc; | |
971 | c->permissions = le32_to_cpu(buf[0]); | |
972 | nexpr = le32_to_cpu(buf[1]); | |
973 | le = NULL; | |
974 | depth = -1; | |
975 | for (j = 0; j < nexpr; j++) { | |
89d155ef | 976 | e = kzalloc(sizeof(*e), GFP_KERNEL); |
1da177e4 LT |
977 | if (!e) |
978 | return -ENOMEM; | |
1da177e4 LT |
979 | |
980 | if (le) { | |
981 | le->next = e; | |
982 | } else { | |
983 | c->expr = e; | |
984 | } | |
985 | ||
986 | rc = next_entry(buf, fp, (sizeof(u32) * 3)); | |
987 | if (rc < 0) | |
988 | return rc; | |
989 | e->expr_type = le32_to_cpu(buf[0]); | |
990 | e->attr = le32_to_cpu(buf[1]); | |
991 | e->op = le32_to_cpu(buf[2]); | |
992 | ||
993 | switch (e->expr_type) { | |
994 | case CEXPR_NOT: | |
995 | if (depth < 0) | |
996 | return -EINVAL; | |
997 | break; | |
998 | case CEXPR_AND: | |
999 | case CEXPR_OR: | |
1000 | if (depth < 1) | |
1001 | return -EINVAL; | |
1002 | depth--; | |
1003 | break; | |
1004 | case CEXPR_ATTR: | |
1005 | if (depth == (CEXPR_MAXDEPTH - 1)) | |
1006 | return -EINVAL; | |
1007 | depth++; | |
1008 | break; | |
1009 | case CEXPR_NAMES: | |
1010 | if (!allowxtarget && (e->attr & CEXPR_XTARGET)) | |
1011 | return -EINVAL; | |
1012 | if (depth == (CEXPR_MAXDEPTH - 1)) | |
1013 | return -EINVAL; | |
1014 | depth++; | |
1015 | if (ebitmap_read(&e->names, fp)) | |
1016 | return -EINVAL; | |
1017 | break; | |
1018 | default: | |
1019 | return -EINVAL; | |
1020 | } | |
1021 | le = e; | |
1022 | } | |
1023 | if (depth != 0) | |
1024 | return -EINVAL; | |
1025 | lc = c; | |
1026 | } | |
1027 | ||
1028 | return 0; | |
1029 | } | |
1030 | ||
1031 | static int class_read(struct policydb *p, struct hashtab *h, void *fp) | |
1032 | { | |
1033 | char *key = NULL; | |
1034 | struct class_datum *cladatum; | |
b5bf6c55 AD |
1035 | __le32 buf[6]; |
1036 | u32 len, len2, ncons, nel; | |
1da177e4 LT |
1037 | int i, rc; |
1038 | ||
89d155ef | 1039 | cladatum = kzalloc(sizeof(*cladatum), GFP_KERNEL); |
1da177e4 LT |
1040 | if (!cladatum) { |
1041 | rc = -ENOMEM; | |
1042 | goto out; | |
1043 | } | |
1da177e4 LT |
1044 | |
1045 | rc = next_entry(buf, fp, sizeof(u32)*6); | |
1046 | if (rc < 0) | |
1047 | goto bad; | |
1048 | ||
1049 | len = le32_to_cpu(buf[0]); | |
1050 | len2 = le32_to_cpu(buf[1]); | |
1051 | cladatum->value = le32_to_cpu(buf[2]); | |
1052 | ||
1053 | rc = symtab_init(&cladatum->permissions, PERM_SYMTAB_SIZE); | |
1054 | if (rc) | |
1055 | goto bad; | |
1056 | cladatum->permissions.nprim = le32_to_cpu(buf[3]); | |
1057 | nel = le32_to_cpu(buf[4]); | |
1058 | ||
1059 | ncons = le32_to_cpu(buf[5]); | |
1060 | ||
1061 | key = kmalloc(len + 1,GFP_KERNEL); | |
1062 | if (!key) { | |
1063 | rc = -ENOMEM; | |
1064 | goto bad; | |
1065 | } | |
1066 | rc = next_entry(key, fp, len); | |
1067 | if (rc < 0) | |
1068 | goto bad; | |
1069 | key[len] = 0; | |
1070 | ||
1071 | if (len2) { | |
1072 | cladatum->comkey = kmalloc(len2 + 1,GFP_KERNEL); | |
1073 | if (!cladatum->comkey) { | |
1074 | rc = -ENOMEM; | |
1075 | goto bad; | |
1076 | } | |
1077 | rc = next_entry(cladatum->comkey, fp, len2); | |
1078 | if (rc < 0) | |
1079 | goto bad; | |
1080 | cladatum->comkey[len2] = 0; | |
1081 | ||
1082 | cladatum->comdatum = hashtab_search(p->p_commons.table, | |
1083 | cladatum->comkey); | |
1084 | if (!cladatum->comdatum) { | |
1085 | printk(KERN_ERR "security: unknown common %s\n", | |
1086 | cladatum->comkey); | |
1087 | rc = -EINVAL; | |
1088 | goto bad; | |
1089 | } | |
1090 | } | |
1091 | for (i = 0; i < nel; i++) { | |
1092 | rc = perm_read(p, cladatum->permissions.table, fp); | |
1093 | if (rc) | |
1094 | goto bad; | |
1095 | } | |
1096 | ||
1097 | rc = read_cons_helper(&cladatum->constraints, ncons, 0, fp); | |
1098 | if (rc) | |
1099 | goto bad; | |
1100 | ||
1101 | if (p->policyvers >= POLICYDB_VERSION_VALIDATETRANS) { | |
1102 | /* grab the validatetrans rules */ | |
1103 | rc = next_entry(buf, fp, sizeof(u32)); | |
1104 | if (rc < 0) | |
1105 | goto bad; | |
1106 | ncons = le32_to_cpu(buf[0]); | |
1107 | rc = read_cons_helper(&cladatum->validatetrans, ncons, 1, fp); | |
1108 | if (rc) | |
1109 | goto bad; | |
1110 | } | |
1111 | ||
1112 | rc = hashtab_insert(h, key, cladatum); | |
1113 | if (rc) | |
1114 | goto bad; | |
1115 | ||
1116 | rc = 0; | |
1117 | out: | |
1118 | return rc; | |
1119 | bad: | |
1120 | class_destroy(key, cladatum, NULL); | |
1121 | goto out; | |
1122 | } | |
1123 | ||
1124 | static int role_read(struct policydb *p, struct hashtab *h, void *fp) | |
1125 | { | |
1126 | char *key = NULL; | |
1127 | struct role_datum *role; | |
1128 | int rc; | |
b5bf6c55 AD |
1129 | __le32 buf[2]; |
1130 | u32 len; | |
1da177e4 | 1131 | |
89d155ef | 1132 | role = kzalloc(sizeof(*role), GFP_KERNEL); |
1da177e4 LT |
1133 | if (!role) { |
1134 | rc = -ENOMEM; | |
1135 | goto out; | |
1136 | } | |
1da177e4 LT |
1137 | |
1138 | rc = next_entry(buf, fp, sizeof buf); | |
1139 | if (rc < 0) | |
1140 | goto bad; | |
1141 | ||
1142 | len = le32_to_cpu(buf[0]); | |
1143 | role->value = le32_to_cpu(buf[1]); | |
1144 | ||
1145 | key = kmalloc(len + 1,GFP_KERNEL); | |
1146 | if (!key) { | |
1147 | rc = -ENOMEM; | |
1148 | goto bad; | |
1149 | } | |
1150 | rc = next_entry(key, fp, len); | |
1151 | if (rc < 0) | |
1152 | goto bad; | |
1153 | key[len] = 0; | |
1154 | ||
1155 | rc = ebitmap_read(&role->dominates, fp); | |
1156 | if (rc) | |
1157 | goto bad; | |
1158 | ||
1159 | rc = ebitmap_read(&role->types, fp); | |
1160 | if (rc) | |
1161 | goto bad; | |
1162 | ||
1163 | if (strcmp(key, OBJECT_R) == 0) { | |
1164 | if (role->value != OBJECT_R_VAL) { | |
1165 | printk(KERN_ERR "Role %s has wrong value %d\n", | |
1166 | OBJECT_R, role->value); | |
1167 | rc = -EINVAL; | |
1168 | goto bad; | |
1169 | } | |
1170 | rc = 0; | |
1171 | goto bad; | |
1172 | } | |
1173 | ||
1174 | rc = hashtab_insert(h, key, role); | |
1175 | if (rc) | |
1176 | goto bad; | |
1177 | out: | |
1178 | return rc; | |
1179 | bad: | |
1180 | role_destroy(key, role, NULL); | |
1181 | goto out; | |
1182 | } | |
1183 | ||
1184 | static int type_read(struct policydb *p, struct hashtab *h, void *fp) | |
1185 | { | |
1186 | char *key = NULL; | |
1187 | struct type_datum *typdatum; | |
1188 | int rc; | |
b5bf6c55 AD |
1189 | __le32 buf[3]; |
1190 | u32 len; | |
1da177e4 | 1191 | |
89d155ef | 1192 | typdatum = kzalloc(sizeof(*typdatum),GFP_KERNEL); |
1da177e4 LT |
1193 | if (!typdatum) { |
1194 | rc = -ENOMEM; | |
1195 | return rc; | |
1196 | } | |
1da177e4 LT |
1197 | |
1198 | rc = next_entry(buf, fp, sizeof buf); | |
1199 | if (rc < 0) | |
1200 | goto bad; | |
1201 | ||
1202 | len = le32_to_cpu(buf[0]); | |
1203 | typdatum->value = le32_to_cpu(buf[1]); | |
1204 | typdatum->primary = le32_to_cpu(buf[2]); | |
1205 | ||
1206 | key = kmalloc(len + 1,GFP_KERNEL); | |
1207 | if (!key) { | |
1208 | rc = -ENOMEM; | |
1209 | goto bad; | |
1210 | } | |
1211 | rc = next_entry(key, fp, len); | |
1212 | if (rc < 0) | |
1213 | goto bad; | |
1214 | key[len] = 0; | |
1215 | ||
1216 | rc = hashtab_insert(h, key, typdatum); | |
1217 | if (rc) | |
1218 | goto bad; | |
1219 | out: | |
1220 | return rc; | |
1221 | bad: | |
1222 | type_destroy(key, typdatum, NULL); | |
1223 | goto out; | |
1224 | } | |
1225 | ||
1226 | ||
1227 | /* | |
1228 | * Read a MLS level structure from a policydb binary | |
1229 | * representation file. | |
1230 | */ | |
1231 | static int mls_read_level(struct mls_level *lp, void *fp) | |
1232 | { | |
b5bf6c55 | 1233 | __le32 buf[1]; |
1da177e4 LT |
1234 | int rc; |
1235 | ||
1236 | memset(lp, 0, sizeof(*lp)); | |
1237 | ||
1238 | rc = next_entry(buf, fp, sizeof buf); | |
1239 | if (rc < 0) { | |
1240 | printk(KERN_ERR "security: mls: truncated level\n"); | |
1241 | goto bad; | |
1242 | } | |
1243 | lp->sens = le32_to_cpu(buf[0]); | |
1244 | ||
1245 | if (ebitmap_read(&lp->cat, fp)) { | |
1246 | printk(KERN_ERR "security: mls: error reading level " | |
1247 | "categories\n"); | |
1248 | goto bad; | |
1249 | } | |
1250 | return 0; | |
1251 | ||
1252 | bad: | |
1253 | return -EINVAL; | |
1254 | } | |
1255 | ||
1256 | static int user_read(struct policydb *p, struct hashtab *h, void *fp) | |
1257 | { | |
1258 | char *key = NULL; | |
1259 | struct user_datum *usrdatum; | |
1260 | int rc; | |
b5bf6c55 AD |
1261 | __le32 buf[2]; |
1262 | u32 len; | |
1da177e4 | 1263 | |
89d155ef | 1264 | usrdatum = kzalloc(sizeof(*usrdatum), GFP_KERNEL); |
1da177e4 LT |
1265 | if (!usrdatum) { |
1266 | rc = -ENOMEM; | |
1267 | goto out; | |
1268 | } | |
1da177e4 LT |
1269 | |
1270 | rc = next_entry(buf, fp, sizeof buf); | |
1271 | if (rc < 0) | |
1272 | goto bad; | |
1273 | ||
1274 | len = le32_to_cpu(buf[0]); | |
1275 | usrdatum->value = le32_to_cpu(buf[1]); | |
1276 | ||
1277 | key = kmalloc(len + 1,GFP_KERNEL); | |
1278 | if (!key) { | |
1279 | rc = -ENOMEM; | |
1280 | goto bad; | |
1281 | } | |
1282 | rc = next_entry(key, fp, len); | |
1283 | if (rc < 0) | |
1284 | goto bad; | |
1285 | key[len] = 0; | |
1286 | ||
1287 | rc = ebitmap_read(&usrdatum->roles, fp); | |
1288 | if (rc) | |
1289 | goto bad; | |
1290 | ||
1291 | if (p->policyvers >= POLICYDB_VERSION_MLS) { | |
1292 | rc = mls_read_range_helper(&usrdatum->range, fp); | |
1293 | if (rc) | |
1294 | goto bad; | |
1295 | rc = mls_read_level(&usrdatum->dfltlevel, fp); | |
1296 | if (rc) | |
1297 | goto bad; | |
1298 | } | |
1299 | ||
1300 | rc = hashtab_insert(h, key, usrdatum); | |
1301 | if (rc) | |
1302 | goto bad; | |
1303 | out: | |
1304 | return rc; | |
1305 | bad: | |
1306 | user_destroy(key, usrdatum, NULL); | |
1307 | goto out; | |
1308 | } | |
1309 | ||
1310 | static int sens_read(struct policydb *p, struct hashtab *h, void *fp) | |
1311 | { | |
1312 | char *key = NULL; | |
1313 | struct level_datum *levdatum; | |
1314 | int rc; | |
b5bf6c55 AD |
1315 | __le32 buf[2]; |
1316 | u32 len; | |
1da177e4 | 1317 | |
89d155ef | 1318 | levdatum = kzalloc(sizeof(*levdatum), GFP_ATOMIC); |
1da177e4 LT |
1319 | if (!levdatum) { |
1320 | rc = -ENOMEM; | |
1321 | goto out; | |
1322 | } | |
1da177e4 LT |
1323 | |
1324 | rc = next_entry(buf, fp, sizeof buf); | |
1325 | if (rc < 0) | |
1326 | goto bad; | |
1327 | ||
1328 | len = le32_to_cpu(buf[0]); | |
1329 | levdatum->isalias = le32_to_cpu(buf[1]); | |
1330 | ||
1331 | key = kmalloc(len + 1,GFP_ATOMIC); | |
1332 | if (!key) { | |
1333 | rc = -ENOMEM; | |
1334 | goto bad; | |
1335 | } | |
1336 | rc = next_entry(key, fp, len); | |
1337 | if (rc < 0) | |
1338 | goto bad; | |
1339 | key[len] = 0; | |
1340 | ||
1341 | levdatum->level = kmalloc(sizeof(struct mls_level), GFP_ATOMIC); | |
1342 | if (!levdatum->level) { | |
1343 | rc = -ENOMEM; | |
1344 | goto bad; | |
1345 | } | |
1346 | if (mls_read_level(levdatum->level, fp)) { | |
1347 | rc = -EINVAL; | |
1348 | goto bad; | |
1349 | } | |
1350 | ||
1351 | rc = hashtab_insert(h, key, levdatum); | |
1352 | if (rc) | |
1353 | goto bad; | |
1354 | out: | |
1355 | return rc; | |
1356 | bad: | |
1357 | sens_destroy(key, levdatum, NULL); | |
1358 | goto out; | |
1359 | } | |
1360 | ||
1361 | static int cat_read(struct policydb *p, struct hashtab *h, void *fp) | |
1362 | { | |
1363 | char *key = NULL; | |
1364 | struct cat_datum *catdatum; | |
1365 | int rc; | |
b5bf6c55 AD |
1366 | __le32 buf[3]; |
1367 | u32 len; | |
1da177e4 | 1368 | |
89d155ef | 1369 | catdatum = kzalloc(sizeof(*catdatum), GFP_ATOMIC); |
1da177e4 LT |
1370 | if (!catdatum) { |
1371 | rc = -ENOMEM; | |
1372 | goto out; | |
1373 | } | |
1da177e4 LT |
1374 | |
1375 | rc = next_entry(buf, fp, sizeof buf); | |
1376 | if (rc < 0) | |
1377 | goto bad; | |
1378 | ||
1379 | len = le32_to_cpu(buf[0]); | |
1380 | catdatum->value = le32_to_cpu(buf[1]); | |
1381 | catdatum->isalias = le32_to_cpu(buf[2]); | |
1382 | ||
1383 | key = kmalloc(len + 1,GFP_ATOMIC); | |
1384 | if (!key) { | |
1385 | rc = -ENOMEM; | |
1386 | goto bad; | |
1387 | } | |
1388 | rc = next_entry(key, fp, len); | |
1389 | if (rc < 0) | |
1390 | goto bad; | |
1391 | key[len] = 0; | |
1392 | ||
1393 | rc = hashtab_insert(h, key, catdatum); | |
1394 | if (rc) | |
1395 | goto bad; | |
1396 | out: | |
1397 | return rc; | |
1398 | ||
1399 | bad: | |
1400 | cat_destroy(key, catdatum, NULL); | |
1401 | goto out; | |
1402 | } | |
1403 | ||
1404 | static int (*read_f[SYM_NUM]) (struct policydb *p, struct hashtab *h, void *fp) = | |
1405 | { | |
1406 | common_read, | |
1407 | class_read, | |
1408 | role_read, | |
1409 | type_read, | |
1410 | user_read, | |
1411 | cond_read_bool, | |
1412 | sens_read, | |
1413 | cat_read, | |
1414 | }; | |
1415 | ||
1416 | extern int ss_initialized; | |
1417 | ||
1418 | /* | |
1419 | * Read the configuration data from a policy database binary | |
1420 | * representation file into a policy database structure. | |
1421 | */ | |
1422 | int policydb_read(struct policydb *p, void *fp) | |
1423 | { | |
1424 | struct role_allow *ra, *lra; | |
1425 | struct role_trans *tr, *ltr; | |
1426 | struct ocontext *l, *c, *newc; | |
1427 | struct genfs *genfs_p, *genfs, *newgenfs; | |
1428 | int i, j, rc; | |
b5bf6c55 AD |
1429 | __le32 buf[8]; |
1430 | u32 len, len2, config, nprim, nel, nel2; | |
1da177e4 LT |
1431 | char *policydb_str; |
1432 | struct policydb_compat_info *info; | |
1433 | struct range_trans *rt, *lrt; | |
1434 | ||
1435 | config = 0; | |
1436 | ||
1437 | rc = policydb_init(p); | |
1438 | if (rc) | |
1439 | goto out; | |
1440 | ||
1441 | /* Read the magic number and string length. */ | |
1442 | rc = next_entry(buf, fp, sizeof(u32)* 2); | |
1443 | if (rc < 0) | |
1444 | goto bad; | |
1445 | ||
b5bf6c55 | 1446 | if (le32_to_cpu(buf[0]) != POLICYDB_MAGIC) { |
1da177e4 LT |
1447 | printk(KERN_ERR "security: policydb magic number 0x%x does " |
1448 | "not match expected magic number 0x%x\n", | |
b5bf6c55 | 1449 | le32_to_cpu(buf[0]), POLICYDB_MAGIC); |
1da177e4 LT |
1450 | goto bad; |
1451 | } | |
1452 | ||
b5bf6c55 | 1453 | len = le32_to_cpu(buf[1]); |
1da177e4 LT |
1454 | if (len != strlen(POLICYDB_STRING)) { |
1455 | printk(KERN_ERR "security: policydb string length %d does not " | |
1456 | "match expected length %Zu\n", | |
1457 | len, strlen(POLICYDB_STRING)); | |
1458 | goto bad; | |
1459 | } | |
1460 | policydb_str = kmalloc(len + 1,GFP_KERNEL); | |
1461 | if (!policydb_str) { | |
1462 | printk(KERN_ERR "security: unable to allocate memory for policydb " | |
1463 | "string of length %d\n", len); | |
1464 | rc = -ENOMEM; | |
1465 | goto bad; | |
1466 | } | |
1467 | rc = next_entry(policydb_str, fp, len); | |
1468 | if (rc < 0) { | |
1469 | printk(KERN_ERR "security: truncated policydb string identifier\n"); | |
1470 | kfree(policydb_str); | |
1471 | goto bad; | |
1472 | } | |
1473 | policydb_str[len] = 0; | |
1474 | if (strcmp(policydb_str, POLICYDB_STRING)) { | |
1475 | printk(KERN_ERR "security: policydb string %s does not match " | |
1476 | "my string %s\n", policydb_str, POLICYDB_STRING); | |
1477 | kfree(policydb_str); | |
1478 | goto bad; | |
1479 | } | |
1480 | /* Done with policydb_str. */ | |
1481 | kfree(policydb_str); | |
1482 | policydb_str = NULL; | |
1483 | ||
1484 | /* Read the version, config, and table sizes. */ | |
1485 | rc = next_entry(buf, fp, sizeof(u32)*4); | |
1486 | if (rc < 0) | |
1487 | goto bad; | |
1da177e4 | 1488 | |
b5bf6c55 | 1489 | p->policyvers = le32_to_cpu(buf[0]); |
1da177e4 LT |
1490 | if (p->policyvers < POLICYDB_VERSION_MIN || |
1491 | p->policyvers > POLICYDB_VERSION_MAX) { | |
1492 | printk(KERN_ERR "security: policydb version %d does not match " | |
1493 | "my version range %d-%d\n", | |
b5bf6c55 | 1494 | le32_to_cpu(buf[0]), POLICYDB_VERSION_MIN, POLICYDB_VERSION_MAX); |
1da177e4 LT |
1495 | goto bad; |
1496 | } | |
1497 | ||
b5bf6c55 | 1498 | if ((le32_to_cpu(buf[1]) & POLICYDB_CONFIG_MLS)) { |
1da177e4 LT |
1499 | if (ss_initialized && !selinux_mls_enabled) { |
1500 | printk(KERN_ERR "Cannot switch between non-MLS and MLS " | |
1501 | "policies\n"); | |
1502 | goto bad; | |
1503 | } | |
1504 | selinux_mls_enabled = 1; | |
1505 | config |= POLICYDB_CONFIG_MLS; | |
1506 | ||
1507 | if (p->policyvers < POLICYDB_VERSION_MLS) { | |
1508 | printk(KERN_ERR "security policydb version %d (MLS) " | |
1509 | "not backwards compatible\n", p->policyvers); | |
1510 | goto bad; | |
1511 | } | |
1512 | } else { | |
1513 | if (ss_initialized && selinux_mls_enabled) { | |
1514 | printk(KERN_ERR "Cannot switch between MLS and non-MLS " | |
1515 | "policies\n"); | |
1516 | goto bad; | |
1517 | } | |
1518 | } | |
1519 | ||
1520 | info = policydb_lookup_compat(p->policyvers); | |
1521 | if (!info) { | |
1522 | printk(KERN_ERR "security: unable to find policy compat info " | |
1523 | "for version %d\n", p->policyvers); | |
1524 | goto bad; | |
1525 | } | |
1526 | ||
b5bf6c55 AD |
1527 | if (le32_to_cpu(buf[2]) != info->sym_num || |
1528 | le32_to_cpu(buf[3]) != info->ocon_num) { | |
1da177e4 | 1529 | printk(KERN_ERR "security: policydb table sizes (%d,%d) do " |
b5bf6c55 AD |
1530 | "not match mine (%d,%d)\n", le32_to_cpu(buf[2]), |
1531 | le32_to_cpu(buf[3]), | |
1da177e4 LT |
1532 | info->sym_num, info->ocon_num); |
1533 | goto bad; | |
1534 | } | |
1535 | ||
1536 | for (i = 0; i < info->sym_num; i++) { | |
1537 | rc = next_entry(buf, fp, sizeof(u32)*2); | |
1538 | if (rc < 0) | |
1539 | goto bad; | |
1540 | nprim = le32_to_cpu(buf[0]); | |
1541 | nel = le32_to_cpu(buf[1]); | |
1542 | for (j = 0; j < nel; j++) { | |
1543 | rc = read_f[i](p, p->symtab[i].table, fp); | |
1544 | if (rc) | |
1545 | goto bad; | |
1546 | } | |
1547 | ||
1548 | p->symtab[i].nprim = nprim; | |
1549 | } | |
1550 | ||
782ebb99 | 1551 | rc = avtab_read(&p->te_avtab, fp, p->policyvers); |
1da177e4 LT |
1552 | if (rc) |
1553 | goto bad; | |
1554 | ||
1555 | if (p->policyvers >= POLICYDB_VERSION_BOOL) { | |
1556 | rc = cond_read_list(p, fp); | |
1557 | if (rc) | |
1558 | goto bad; | |
1559 | } | |
1560 | ||
1561 | rc = next_entry(buf, fp, sizeof(u32)); | |
1562 | if (rc < 0) | |
1563 | goto bad; | |
1564 | nel = le32_to_cpu(buf[0]); | |
1565 | ltr = NULL; | |
1566 | for (i = 0; i < nel; i++) { | |
89d155ef | 1567 | tr = kzalloc(sizeof(*tr), GFP_KERNEL); |
1da177e4 LT |
1568 | if (!tr) { |
1569 | rc = -ENOMEM; | |
1570 | goto bad; | |
1571 | } | |
1da177e4 LT |
1572 | if (ltr) { |
1573 | ltr->next = tr; | |
1574 | } else { | |
1575 | p->role_tr = tr; | |
1576 | } | |
1577 | rc = next_entry(buf, fp, sizeof(u32)*3); | |
1578 | if (rc < 0) | |
1579 | goto bad; | |
1580 | tr->role = le32_to_cpu(buf[0]); | |
1581 | tr->type = le32_to_cpu(buf[1]); | |
1582 | tr->new_role = le32_to_cpu(buf[2]); | |
1583 | ltr = tr; | |
1584 | } | |
1585 | ||
1586 | rc = next_entry(buf, fp, sizeof(u32)); | |
1587 | if (rc < 0) | |
1588 | goto bad; | |
1589 | nel = le32_to_cpu(buf[0]); | |
1590 | lra = NULL; | |
1591 | for (i = 0; i < nel; i++) { | |
89d155ef | 1592 | ra = kzalloc(sizeof(*ra), GFP_KERNEL); |
1da177e4 LT |
1593 | if (!ra) { |
1594 | rc = -ENOMEM; | |
1595 | goto bad; | |
1596 | } | |
1da177e4 LT |
1597 | if (lra) { |
1598 | lra->next = ra; | |
1599 | } else { | |
1600 | p->role_allow = ra; | |
1601 | } | |
1602 | rc = next_entry(buf, fp, sizeof(u32)*2); | |
1603 | if (rc < 0) | |
1604 | goto bad; | |
1605 | ra->role = le32_to_cpu(buf[0]); | |
1606 | ra->new_role = le32_to_cpu(buf[1]); | |
1607 | lra = ra; | |
1608 | } | |
1609 | ||
1610 | rc = policydb_index_classes(p); | |
1611 | if (rc) | |
1612 | goto bad; | |
1613 | ||
1614 | rc = policydb_index_others(p); | |
1615 | if (rc) | |
1616 | goto bad; | |
1617 | ||
1618 | for (i = 0; i < info->ocon_num; i++) { | |
1619 | rc = next_entry(buf, fp, sizeof(u32)); | |
1620 | if (rc < 0) | |
1621 | goto bad; | |
1622 | nel = le32_to_cpu(buf[0]); | |
1623 | l = NULL; | |
1624 | for (j = 0; j < nel; j++) { | |
89d155ef | 1625 | c = kzalloc(sizeof(*c), GFP_KERNEL); |
1da177e4 LT |
1626 | if (!c) { |
1627 | rc = -ENOMEM; | |
1628 | goto bad; | |
1629 | } | |
1da177e4 LT |
1630 | if (l) { |
1631 | l->next = c; | |
1632 | } else { | |
1633 | p->ocontexts[i] = c; | |
1634 | } | |
1635 | l = c; | |
1636 | rc = -EINVAL; | |
1637 | switch (i) { | |
1638 | case OCON_ISID: | |
1639 | rc = next_entry(buf, fp, sizeof(u32)); | |
1640 | if (rc < 0) | |
1641 | goto bad; | |
1642 | c->sid[0] = le32_to_cpu(buf[0]); | |
1643 | rc = context_read_and_validate(&c->context[0], p, fp); | |
1644 | if (rc) | |
1645 | goto bad; | |
1646 | break; | |
1647 | case OCON_FS: | |
1648 | case OCON_NETIF: | |
1649 | rc = next_entry(buf, fp, sizeof(u32)); | |
1650 | if (rc < 0) | |
1651 | goto bad; | |
1652 | len = le32_to_cpu(buf[0]); | |
1653 | c->u.name = kmalloc(len + 1,GFP_KERNEL); | |
1654 | if (!c->u.name) { | |
1655 | rc = -ENOMEM; | |
1656 | goto bad; | |
1657 | } | |
1658 | rc = next_entry(c->u.name, fp, len); | |
1659 | if (rc < 0) | |
1660 | goto bad; | |
1661 | c->u.name[len] = 0; | |
1662 | rc = context_read_and_validate(&c->context[0], p, fp); | |
1663 | if (rc) | |
1664 | goto bad; | |
1665 | rc = context_read_and_validate(&c->context[1], p, fp); | |
1666 | if (rc) | |
1667 | goto bad; | |
1668 | break; | |
1669 | case OCON_PORT: | |
1670 | rc = next_entry(buf, fp, sizeof(u32)*3); | |
1671 | if (rc < 0) | |
1672 | goto bad; | |
1673 | c->u.port.protocol = le32_to_cpu(buf[0]); | |
1674 | c->u.port.low_port = le32_to_cpu(buf[1]); | |
1675 | c->u.port.high_port = le32_to_cpu(buf[2]); | |
1676 | rc = context_read_and_validate(&c->context[0], p, fp); | |
1677 | if (rc) | |
1678 | goto bad; | |
1679 | break; | |
1680 | case OCON_NODE: | |
1681 | rc = next_entry(buf, fp, sizeof(u32)* 2); | |
1682 | if (rc < 0) | |
1683 | goto bad; | |
1684 | c->u.node.addr = le32_to_cpu(buf[0]); | |
1685 | c->u.node.mask = le32_to_cpu(buf[1]); | |
1686 | rc = context_read_and_validate(&c->context[0], p, fp); | |
1687 | if (rc) | |
1688 | goto bad; | |
1689 | break; | |
1690 | case OCON_FSUSE: | |
1691 | rc = next_entry(buf, fp, sizeof(u32)*2); | |
1692 | if (rc < 0) | |
1693 | goto bad; | |
1694 | c->v.behavior = le32_to_cpu(buf[0]); | |
1695 | if (c->v.behavior > SECURITY_FS_USE_NONE) | |
1696 | goto bad; | |
1697 | len = le32_to_cpu(buf[1]); | |
1698 | c->u.name = kmalloc(len + 1,GFP_KERNEL); | |
1699 | if (!c->u.name) { | |
1700 | rc = -ENOMEM; | |
1701 | goto bad; | |
1702 | } | |
1703 | rc = next_entry(c->u.name, fp, len); | |
1704 | if (rc < 0) | |
1705 | goto bad; | |
1706 | c->u.name[len] = 0; | |
1707 | rc = context_read_and_validate(&c->context[0], p, fp); | |
1708 | if (rc) | |
1709 | goto bad; | |
1710 | break; | |
1711 | case OCON_NODE6: { | |
1712 | int k; | |
1713 | ||
1714 | rc = next_entry(buf, fp, sizeof(u32) * 8); | |
1715 | if (rc < 0) | |
1716 | goto bad; | |
1717 | for (k = 0; k < 4; k++) | |
1718 | c->u.node6.addr[k] = le32_to_cpu(buf[k]); | |
1719 | for (k = 0; k < 4; k++) | |
1720 | c->u.node6.mask[k] = le32_to_cpu(buf[k+4]); | |
1721 | if (context_read_and_validate(&c->context[0], p, fp)) | |
1722 | goto bad; | |
1723 | break; | |
1724 | } | |
1725 | } | |
1726 | } | |
1727 | } | |
1728 | ||
1729 | rc = next_entry(buf, fp, sizeof(u32)); | |
1730 | if (rc < 0) | |
1731 | goto bad; | |
1732 | nel = le32_to_cpu(buf[0]); | |
1733 | genfs_p = NULL; | |
1734 | rc = -EINVAL; | |
1735 | for (i = 0; i < nel; i++) { | |
1736 | rc = next_entry(buf, fp, sizeof(u32)); | |
1737 | if (rc < 0) | |
1738 | goto bad; | |
1739 | len = le32_to_cpu(buf[0]); | |
89d155ef | 1740 | newgenfs = kzalloc(sizeof(*newgenfs), GFP_KERNEL); |
1da177e4 LT |
1741 | if (!newgenfs) { |
1742 | rc = -ENOMEM; | |
1743 | goto bad; | |
1744 | } | |
1da177e4 LT |
1745 | |
1746 | newgenfs->fstype = kmalloc(len + 1,GFP_KERNEL); | |
1747 | if (!newgenfs->fstype) { | |
1748 | rc = -ENOMEM; | |
1749 | kfree(newgenfs); | |
1750 | goto bad; | |
1751 | } | |
1752 | rc = next_entry(newgenfs->fstype, fp, len); | |
1753 | if (rc < 0) { | |
1754 | kfree(newgenfs->fstype); | |
1755 | kfree(newgenfs); | |
1756 | goto bad; | |
1757 | } | |
1758 | newgenfs->fstype[len] = 0; | |
1759 | for (genfs_p = NULL, genfs = p->genfs; genfs; | |
1760 | genfs_p = genfs, genfs = genfs->next) { | |
1761 | if (strcmp(newgenfs->fstype, genfs->fstype) == 0) { | |
1762 | printk(KERN_ERR "security: dup genfs " | |
1763 | "fstype %s\n", newgenfs->fstype); | |
1764 | kfree(newgenfs->fstype); | |
1765 | kfree(newgenfs); | |
1766 | goto bad; | |
1767 | } | |
1768 | if (strcmp(newgenfs->fstype, genfs->fstype) < 0) | |
1769 | break; | |
1770 | } | |
1771 | newgenfs->next = genfs; | |
1772 | if (genfs_p) | |
1773 | genfs_p->next = newgenfs; | |
1774 | else | |
1775 | p->genfs = newgenfs; | |
1776 | rc = next_entry(buf, fp, sizeof(u32)); | |
1777 | if (rc < 0) | |
1778 | goto bad; | |
1779 | nel2 = le32_to_cpu(buf[0]); | |
1780 | for (j = 0; j < nel2; j++) { | |
1781 | rc = next_entry(buf, fp, sizeof(u32)); | |
1782 | if (rc < 0) | |
1783 | goto bad; | |
1784 | len = le32_to_cpu(buf[0]); | |
1785 | ||
89d155ef | 1786 | newc = kzalloc(sizeof(*newc), GFP_KERNEL); |
1da177e4 LT |
1787 | if (!newc) { |
1788 | rc = -ENOMEM; | |
1789 | goto bad; | |
1790 | } | |
1da177e4 LT |
1791 | |
1792 | newc->u.name = kmalloc(len + 1,GFP_KERNEL); | |
1793 | if (!newc->u.name) { | |
1794 | rc = -ENOMEM; | |
1795 | goto bad_newc; | |
1796 | } | |
1797 | rc = next_entry(newc->u.name, fp, len); | |
1798 | if (rc < 0) | |
1799 | goto bad_newc; | |
1800 | newc->u.name[len] = 0; | |
1801 | rc = next_entry(buf, fp, sizeof(u32)); | |
1802 | if (rc < 0) | |
1803 | goto bad_newc; | |
1804 | newc->v.sclass = le32_to_cpu(buf[0]); | |
1805 | if (context_read_and_validate(&newc->context[0], p, fp)) | |
1806 | goto bad_newc; | |
1807 | for (l = NULL, c = newgenfs->head; c; | |
1808 | l = c, c = c->next) { | |
1809 | if (!strcmp(newc->u.name, c->u.name) && | |
1810 | (!c->v.sclass || !newc->v.sclass || | |
1811 | newc->v.sclass == c->v.sclass)) { | |
1812 | printk(KERN_ERR "security: dup genfs " | |
1813 | "entry (%s,%s)\n", | |
1814 | newgenfs->fstype, c->u.name); | |
1815 | goto bad_newc; | |
1816 | } | |
1817 | len = strlen(newc->u.name); | |
1818 | len2 = strlen(c->u.name); | |
1819 | if (len > len2) | |
1820 | break; | |
1821 | } | |
1822 | ||
1823 | newc->next = c; | |
1824 | if (l) | |
1825 | l->next = newc; | |
1826 | else | |
1827 | newgenfs->head = newc; | |
1828 | } | |
1829 | } | |
1830 | ||
1831 | if (p->policyvers >= POLICYDB_VERSION_MLS) { | |
1832 | rc = next_entry(buf, fp, sizeof(u32)); | |
1833 | if (rc < 0) | |
1834 | goto bad; | |
1835 | nel = le32_to_cpu(buf[0]); | |
1836 | lrt = NULL; | |
1837 | for (i = 0; i < nel; i++) { | |
89d155ef | 1838 | rt = kzalloc(sizeof(*rt), GFP_KERNEL); |
1da177e4 LT |
1839 | if (!rt) { |
1840 | rc = -ENOMEM; | |
1841 | goto bad; | |
1842 | } | |
1da177e4 LT |
1843 | if (lrt) |
1844 | lrt->next = rt; | |
1845 | else | |
1846 | p->range_tr = rt; | |
1847 | rc = next_entry(buf, fp, (sizeof(u32) * 2)); | |
1848 | if (rc < 0) | |
1849 | goto bad; | |
1850 | rt->dom = le32_to_cpu(buf[0]); | |
1851 | rt->type = le32_to_cpu(buf[1]); | |
1852 | rc = mls_read_range_helper(&rt->range, fp); | |
1853 | if (rc) | |
1854 | goto bad; | |
1855 | lrt = rt; | |
1856 | } | |
1857 | } | |
1858 | ||
782ebb99 SS |
1859 | p->type_attr_map = kmalloc(p->p_types.nprim*sizeof(struct ebitmap), GFP_KERNEL); |
1860 | if (!p->type_attr_map) | |
1861 | goto bad; | |
1862 | ||
1863 | for (i = 0; i < p->p_types.nprim; i++) { | |
1864 | ebitmap_init(&p->type_attr_map[i]); | |
1865 | if (p->policyvers >= POLICYDB_VERSION_AVTAB) { | |
1866 | if (ebitmap_read(&p->type_attr_map[i], fp)) | |
1867 | goto bad; | |
1868 | } | |
1869 | /* add the type itself as the degenerate case */ | |
1870 | if (ebitmap_set_bit(&p->type_attr_map[i], i, 1)) | |
1871 | goto bad; | |
1872 | } | |
1873 | ||
1da177e4 LT |
1874 | rc = 0; |
1875 | out: | |
1876 | return rc; | |
1877 | bad_newc: | |
1878 | ocontext_destroy(newc,OCON_FSUSE); | |
1879 | bad: | |
1880 | if (!rc) | |
1881 | rc = -EINVAL; | |
1882 | policydb_destroy(p); | |
1883 | goto out; | |
1884 | } |