Commit | Line | Data |
---|---|---|
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 | * | |
3bb56b25 PM |
16 | * Updated: Hewlett-Packard <paul.moore@hp.com> |
17 | * | |
18 | * Added support for the policy capability bitmap | |
19 | * | |
20 | * Copyright (C) 2007 Hewlett-Packard Development Company, L.P. | |
1da177e4 LT |
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> | |
9dc99780 | 29 | #include <linux/sched.h> |
1da177e4 LT |
30 | #include <linux/slab.h> |
31 | #include <linux/string.h> | |
32 | #include <linux/errno.h> | |
33 | #include "security.h" | |
34 | ||
35 | #include "policydb.h" | |
36 | #include "conditional.h" | |
37 | #include "mls.h" | |
38 | ||
39 | #define _DEBUG_HASHES | |
40 | ||
41 | #ifdef DEBUG_HASHES | |
42 | static char *symtab_name[SYM_NUM] = { | |
43 | "common prefixes", | |
44 | "classes", | |
45 | "roles", | |
46 | "types", | |
47 | "users", | |
48 | "bools", | |
49 | "levels", | |
50 | "categories", | |
51 | }; | |
52 | #endif | |
53 | ||
54 | int selinux_mls_enabled = 0; | |
55 | ||
56 | static unsigned int symtab_sizes[SYM_NUM] = { | |
57 | 2, | |
58 | 32, | |
59 | 16, | |
60 | 512, | |
61 | 128, | |
62 | 16, | |
63 | 16, | |
64 | 16, | |
65 | }; | |
66 | ||
67 | struct policydb_compat_info { | |
68 | int version; | |
69 | int sym_num; | |
70 | int ocon_num; | |
71 | }; | |
72 | ||
73 | /* These need to be updated if SYM_NUM or OCON_NUM changes */ | |
74 | static struct policydb_compat_info policydb_compat[] = { | |
75 | { | |
76 | .version = POLICYDB_VERSION_BASE, | |
77 | .sym_num = SYM_NUM - 3, | |
78 | .ocon_num = OCON_NUM - 1, | |
79 | }, | |
80 | { | |
81 | .version = POLICYDB_VERSION_BOOL, | |
82 | .sym_num = SYM_NUM - 2, | |
83 | .ocon_num = OCON_NUM - 1, | |
84 | }, | |
85 | { | |
86 | .version = POLICYDB_VERSION_IPV6, | |
87 | .sym_num = SYM_NUM - 2, | |
88 | .ocon_num = OCON_NUM, | |
89 | }, | |
90 | { | |
91 | .version = POLICYDB_VERSION_NLCLASS, | |
92 | .sym_num = SYM_NUM - 2, | |
93 | .ocon_num = OCON_NUM, | |
94 | }, | |
95 | { | |
96 | .version = POLICYDB_VERSION_MLS, | |
97 | .sym_num = SYM_NUM, | |
98 | .ocon_num = OCON_NUM, | |
99 | }, | |
782ebb99 SS |
100 | { |
101 | .version = POLICYDB_VERSION_AVTAB, | |
102 | .sym_num = SYM_NUM, | |
103 | .ocon_num = OCON_NUM, | |
104 | }, | |
f3f87714 DG |
105 | { |
106 | .version = POLICYDB_VERSION_RANGETRANS, | |
107 | .sym_num = SYM_NUM, | |
108 | .ocon_num = OCON_NUM, | |
109 | }, | |
3bb56b25 PM |
110 | { |
111 | .version = POLICYDB_VERSION_POLCAP, | |
112 | .sym_num = SYM_NUM, | |
113 | .ocon_num = OCON_NUM, | |
64dbf074 EP |
114 | }, |
115 | { | |
116 | .version = POLICYDB_VERSION_PERMISSIVE, | |
117 | .sym_num = SYM_NUM, | |
118 | .ocon_num = OCON_NUM, | |
3bb56b25 | 119 | } |
1da177e4 LT |
120 | }; |
121 | ||
122 | static struct policydb_compat_info *policydb_lookup_compat(int version) | |
123 | { | |
124 | int i; | |
125 | struct policydb_compat_info *info = NULL; | |
126 | ||
32725ad8 | 127 | for (i = 0; i < ARRAY_SIZE(policydb_compat); i++) { |
1da177e4 LT |
128 | if (policydb_compat[i].version == version) { |
129 | info = &policydb_compat[i]; | |
130 | break; | |
131 | } | |
132 | } | |
133 | return info; | |
134 | } | |
135 | ||
136 | /* | |
137 | * Initialize the role table. | |
138 | */ | |
139 | static int roles_init(struct policydb *p) | |
140 | { | |
141 | char *key = NULL; | |
142 | int rc; | |
143 | struct role_datum *role; | |
144 | ||
89d155ef | 145 | role = kzalloc(sizeof(*role), GFP_KERNEL); |
1da177e4 LT |
146 | if (!role) { |
147 | rc = -ENOMEM; | |
148 | goto out; | |
149 | } | |
1da177e4 LT |
150 | role->value = ++p->p_roles.nprim; |
151 | if (role->value != OBJECT_R_VAL) { | |
152 | rc = -EINVAL; | |
153 | goto out_free_role; | |
154 | } | |
155 | key = kmalloc(strlen(OBJECT_R)+1,GFP_KERNEL); | |
156 | if (!key) { | |
157 | rc = -ENOMEM; | |
158 | goto out_free_role; | |
159 | } | |
160 | strcpy(key, OBJECT_R); | |
161 | rc = hashtab_insert(p->p_roles.table, key, role); | |
162 | if (rc) | |
163 | goto out_free_key; | |
164 | out: | |
165 | return rc; | |
166 | ||
167 | out_free_key: | |
168 | kfree(key); | |
169 | out_free_role: | |
170 | kfree(role); | |
171 | goto out; | |
172 | } | |
173 | ||
174 | /* | |
175 | * Initialize a policy database structure. | |
176 | */ | |
177 | static int policydb_init(struct policydb *p) | |
178 | { | |
179 | int i, rc; | |
180 | ||
181 | memset(p, 0, sizeof(*p)); | |
182 | ||
183 | for (i = 0; i < SYM_NUM; i++) { | |
184 | rc = symtab_init(&p->symtab[i], symtab_sizes[i]); | |
185 | if (rc) | |
186 | goto out_free_symtab; | |
187 | } | |
188 | ||
189 | rc = avtab_init(&p->te_avtab); | |
190 | if (rc) | |
191 | goto out_free_symtab; | |
192 | ||
193 | rc = roles_init(p); | |
194 | if (rc) | |
3232c110 | 195 | goto out_free_symtab; |
1da177e4 LT |
196 | |
197 | rc = cond_policydb_init(p); | |
198 | if (rc) | |
3232c110 | 199 | goto out_free_symtab; |
1da177e4 | 200 | |
3bb56b25 | 201 | ebitmap_init(&p->policycaps); |
64dbf074 | 202 | ebitmap_init(&p->permissive_map); |
3bb56b25 | 203 | |
1da177e4 LT |
204 | out: |
205 | return rc; | |
206 | ||
1da177e4 LT |
207 | out_free_symtab: |
208 | for (i = 0; i < SYM_NUM; i++) | |
209 | hashtab_destroy(p->symtab[i].table); | |
210 | goto out; | |
211 | } | |
212 | ||
213 | /* | |
214 | * The following *_index functions are used to | |
215 | * define the val_to_name and val_to_struct arrays | |
216 | * in a policy database structure. The val_to_name | |
217 | * arrays are used when converting security context | |
218 | * structures into string representations. The | |
219 | * val_to_struct arrays are used when the attributes | |
220 | * of a class, role, or user are needed. | |
221 | */ | |
222 | ||
223 | static int common_index(void *key, void *datum, void *datap) | |
224 | { | |
225 | struct policydb *p; | |
226 | struct common_datum *comdatum; | |
227 | ||
228 | comdatum = datum; | |
229 | p = datap; | |
230 | if (!comdatum->value || comdatum->value > p->p_commons.nprim) | |
231 | return -EINVAL; | |
232 | p->p_common_val_to_name[comdatum->value - 1] = key; | |
233 | return 0; | |
234 | } | |
235 | ||
236 | static int class_index(void *key, void *datum, void *datap) | |
237 | { | |
238 | struct policydb *p; | |
239 | struct class_datum *cladatum; | |
240 | ||
241 | cladatum = datum; | |
242 | p = datap; | |
243 | if (!cladatum->value || cladatum->value > p->p_classes.nprim) | |
244 | return -EINVAL; | |
245 | p->p_class_val_to_name[cladatum->value - 1] = key; | |
246 | p->class_val_to_struct[cladatum->value - 1] = cladatum; | |
247 | return 0; | |
248 | } | |
249 | ||
250 | static int role_index(void *key, void *datum, void *datap) | |
251 | { | |
252 | struct policydb *p; | |
253 | struct role_datum *role; | |
254 | ||
255 | role = datum; | |
256 | p = datap; | |
257 | if (!role->value || role->value > p->p_roles.nprim) | |
258 | return -EINVAL; | |
259 | p->p_role_val_to_name[role->value - 1] = key; | |
260 | p->role_val_to_struct[role->value - 1] = role; | |
261 | return 0; | |
262 | } | |
263 | ||
264 | static int type_index(void *key, void *datum, void *datap) | |
265 | { | |
266 | struct policydb *p; | |
267 | struct type_datum *typdatum; | |
268 | ||
269 | typdatum = datum; | |
270 | p = datap; | |
271 | ||
272 | if (typdatum->primary) { | |
273 | if (!typdatum->value || typdatum->value > p->p_types.nprim) | |
274 | return -EINVAL; | |
275 | p->p_type_val_to_name[typdatum->value - 1] = key; | |
276 | } | |
277 | ||
278 | return 0; | |
279 | } | |
280 | ||
281 | static int user_index(void *key, void *datum, void *datap) | |
282 | { | |
283 | struct policydb *p; | |
284 | struct user_datum *usrdatum; | |
285 | ||
286 | usrdatum = datum; | |
287 | p = datap; | |
288 | if (!usrdatum->value || usrdatum->value > p->p_users.nprim) | |
289 | return -EINVAL; | |
290 | p->p_user_val_to_name[usrdatum->value - 1] = key; | |
291 | p->user_val_to_struct[usrdatum->value - 1] = usrdatum; | |
292 | return 0; | |
293 | } | |
294 | ||
295 | static int sens_index(void *key, void *datum, void *datap) | |
296 | { | |
297 | struct policydb *p; | |
298 | struct level_datum *levdatum; | |
299 | ||
300 | levdatum = datum; | |
301 | p = datap; | |
302 | ||
303 | if (!levdatum->isalias) { | |
304 | if (!levdatum->level->sens || | |
305 | levdatum->level->sens > p->p_levels.nprim) | |
306 | return -EINVAL; | |
307 | p->p_sens_val_to_name[levdatum->level->sens - 1] = key; | |
308 | } | |
309 | ||
310 | return 0; | |
311 | } | |
312 | ||
313 | static int cat_index(void *key, void *datum, void *datap) | |
314 | { | |
315 | struct policydb *p; | |
316 | struct cat_datum *catdatum; | |
317 | ||
318 | catdatum = datum; | |
319 | p = datap; | |
320 | ||
321 | if (!catdatum->isalias) { | |
322 | if (!catdatum->value || catdatum->value > p->p_cats.nprim) | |
323 | return -EINVAL; | |
324 | p->p_cat_val_to_name[catdatum->value - 1] = key; | |
325 | } | |
326 | ||
327 | return 0; | |
328 | } | |
329 | ||
330 | static int (*index_f[SYM_NUM]) (void *key, void *datum, void *datap) = | |
331 | { | |
332 | common_index, | |
333 | class_index, | |
334 | role_index, | |
335 | type_index, | |
336 | user_index, | |
337 | cond_index_bool, | |
338 | sens_index, | |
339 | cat_index, | |
340 | }; | |
341 | ||
342 | /* | |
343 | * Define the common val_to_name array and the class | |
344 | * val_to_name and val_to_struct arrays in a policy | |
345 | * database structure. | |
346 | * | |
347 | * Caller must clean up upon failure. | |
348 | */ | |
349 | static int policydb_index_classes(struct policydb *p) | |
350 | { | |
351 | int rc; | |
352 | ||
353 | p->p_common_val_to_name = | |
354 | kmalloc(p->p_commons.nprim * sizeof(char *), GFP_KERNEL); | |
355 | if (!p->p_common_val_to_name) { | |
356 | rc = -ENOMEM; | |
357 | goto out; | |
358 | } | |
359 | ||
360 | rc = hashtab_map(p->p_commons.table, common_index, p); | |
361 | if (rc) | |
362 | goto out; | |
363 | ||
364 | p->class_val_to_struct = | |
365 | kmalloc(p->p_classes.nprim * sizeof(*(p->class_val_to_struct)), GFP_KERNEL); | |
366 | if (!p->class_val_to_struct) { | |
367 | rc = -ENOMEM; | |
368 | goto out; | |
369 | } | |
370 | ||
371 | p->p_class_val_to_name = | |
372 | kmalloc(p->p_classes.nprim * sizeof(char *), GFP_KERNEL); | |
373 | if (!p->p_class_val_to_name) { | |
374 | rc = -ENOMEM; | |
375 | goto out; | |
376 | } | |
377 | ||
378 | rc = hashtab_map(p->p_classes.table, class_index, p); | |
379 | out: | |
380 | return rc; | |
381 | } | |
382 | ||
383 | #ifdef DEBUG_HASHES | |
384 | static void symtab_hash_eval(struct symtab *s) | |
385 | { | |
386 | int i; | |
387 | ||
388 | for (i = 0; i < SYM_NUM; i++) { | |
389 | struct hashtab *h = s[i].table; | |
390 | struct hashtab_info info; | |
391 | ||
392 | hashtab_stat(h, &info); | |
fadcdb45 | 393 | printk(KERN_DEBUG "%s: %d entries and %d/%d buckets used, " |
1da177e4 LT |
394 | "longest chain length %d\n", symtab_name[i], h->nel, |
395 | info.slots_used, h->size, info.max_chain_len); | |
396 | } | |
397 | } | |
398 | #endif | |
399 | ||
400 | /* | |
401 | * Define the other val_to_name and val_to_struct arrays | |
402 | * in a policy database structure. | |
403 | * | |
404 | * Caller must clean up on failure. | |
405 | */ | |
406 | static int policydb_index_others(struct policydb *p) | |
407 | { | |
408 | int i, rc = 0; | |
409 | ||
454d972c | 410 | printk(KERN_DEBUG "SELinux: %d users, %d roles, %d types, %d bools", |
1da177e4 LT |
411 | p->p_users.nprim, p->p_roles.nprim, p->p_types.nprim, p->p_bools.nprim); |
412 | if (selinux_mls_enabled) | |
413 | printk(", %d sens, %d cats", p->p_levels.nprim, | |
414 | p->p_cats.nprim); | |
415 | printk("\n"); | |
416 | ||
454d972c | 417 | printk(KERN_DEBUG "SELinux: %d classes, %d rules\n", |
1da177e4 LT |
418 | p->p_classes.nprim, p->te_avtab.nel); |
419 | ||
420 | #ifdef DEBUG_HASHES | |
421 | avtab_hash_eval(&p->te_avtab, "rules"); | |
422 | symtab_hash_eval(p->symtab); | |
423 | #endif | |
424 | ||
425 | p->role_val_to_struct = | |
426 | kmalloc(p->p_roles.nprim * sizeof(*(p->role_val_to_struct)), | |
427 | GFP_KERNEL); | |
428 | if (!p->role_val_to_struct) { | |
429 | rc = -ENOMEM; | |
430 | goto out; | |
431 | } | |
432 | ||
433 | p->user_val_to_struct = | |
434 | kmalloc(p->p_users.nprim * sizeof(*(p->user_val_to_struct)), | |
435 | GFP_KERNEL); | |
436 | if (!p->user_val_to_struct) { | |
437 | rc = -ENOMEM; | |
438 | goto out; | |
439 | } | |
440 | ||
441 | if (cond_init_bool_indexes(p)) { | |
442 | rc = -ENOMEM; | |
443 | goto out; | |
444 | } | |
445 | ||
446 | for (i = SYM_ROLES; i < SYM_NUM; i++) { | |
447 | p->sym_val_to_name[i] = | |
448 | kmalloc(p->symtab[i].nprim * sizeof(char *), GFP_KERNEL); | |
449 | if (!p->sym_val_to_name[i]) { | |
450 | rc = -ENOMEM; | |
451 | goto out; | |
452 | } | |
453 | rc = hashtab_map(p->symtab[i].table, index_f[i], p); | |
454 | if (rc) | |
455 | goto out; | |
456 | } | |
457 | ||
458 | out: | |
459 | return rc; | |
460 | } | |
461 | ||
462 | /* | |
463 | * The following *_destroy functions are used to | |
464 | * free any memory allocated for each kind of | |
465 | * symbol data in the policy database. | |
466 | */ | |
467 | ||
468 | static int perm_destroy(void *key, void *datum, void *p) | |
469 | { | |
470 | kfree(key); | |
471 | kfree(datum); | |
472 | return 0; | |
473 | } | |
474 | ||
475 | static int common_destroy(void *key, void *datum, void *p) | |
476 | { | |
477 | struct common_datum *comdatum; | |
478 | ||
479 | kfree(key); | |
480 | comdatum = datum; | |
481 | hashtab_map(comdatum->permissions.table, perm_destroy, NULL); | |
482 | hashtab_destroy(comdatum->permissions.table); | |
483 | kfree(datum); | |
484 | return 0; | |
485 | } | |
486 | ||
6cbda6b6 | 487 | static int cls_destroy(void *key, void *datum, void *p) |
1da177e4 LT |
488 | { |
489 | struct class_datum *cladatum; | |
490 | struct constraint_node *constraint, *ctemp; | |
491 | struct constraint_expr *e, *etmp; | |
492 | ||
493 | kfree(key); | |
494 | cladatum = datum; | |
495 | hashtab_map(cladatum->permissions.table, perm_destroy, NULL); | |
496 | hashtab_destroy(cladatum->permissions.table); | |
497 | constraint = cladatum->constraints; | |
498 | while (constraint) { | |
499 | e = constraint->expr; | |
500 | while (e) { | |
501 | ebitmap_destroy(&e->names); | |
502 | etmp = e; | |
503 | e = e->next; | |
504 | kfree(etmp); | |
505 | } | |
506 | ctemp = constraint; | |
507 | constraint = constraint->next; | |
508 | kfree(ctemp); | |
509 | } | |
510 | ||
511 | constraint = cladatum->validatetrans; | |
512 | while (constraint) { | |
513 | e = constraint->expr; | |
514 | while (e) { | |
515 | ebitmap_destroy(&e->names); | |
516 | etmp = e; | |
517 | e = e->next; | |
518 | kfree(etmp); | |
519 | } | |
520 | ctemp = constraint; | |
521 | constraint = constraint->next; | |
522 | kfree(ctemp); | |
523 | } | |
524 | ||
525 | kfree(cladatum->comkey); | |
526 | kfree(datum); | |
527 | return 0; | |
528 | } | |
529 | ||
530 | static int role_destroy(void *key, void *datum, void *p) | |
531 | { | |
532 | struct role_datum *role; | |
533 | ||
534 | kfree(key); | |
535 | role = datum; | |
536 | ebitmap_destroy(&role->dominates); | |
537 | ebitmap_destroy(&role->types); | |
538 | kfree(datum); | |
539 | return 0; | |
540 | } | |
541 | ||
542 | static int type_destroy(void *key, void *datum, void *p) | |
543 | { | |
544 | kfree(key); | |
545 | kfree(datum); | |
546 | return 0; | |
547 | } | |
548 | ||
549 | static int user_destroy(void *key, void *datum, void *p) | |
550 | { | |
551 | struct user_datum *usrdatum; | |
552 | ||
553 | kfree(key); | |
554 | usrdatum = datum; | |
555 | ebitmap_destroy(&usrdatum->roles); | |
556 | ebitmap_destroy(&usrdatum->range.level[0].cat); | |
557 | ebitmap_destroy(&usrdatum->range.level[1].cat); | |
558 | ebitmap_destroy(&usrdatum->dfltlevel.cat); | |
559 | kfree(datum); | |
560 | return 0; | |
561 | } | |
562 | ||
563 | static int sens_destroy(void *key, void *datum, void *p) | |
564 | { | |
565 | struct level_datum *levdatum; | |
566 | ||
567 | kfree(key); | |
568 | levdatum = datum; | |
569 | ebitmap_destroy(&levdatum->level->cat); | |
570 | kfree(levdatum->level); | |
571 | kfree(datum); | |
572 | return 0; | |
573 | } | |
574 | ||
575 | static int cat_destroy(void *key, void *datum, void *p) | |
576 | { | |
577 | kfree(key); | |
578 | kfree(datum); | |
579 | return 0; | |
580 | } | |
581 | ||
582 | static int (*destroy_f[SYM_NUM]) (void *key, void *datum, void *datap) = | |
583 | { | |
584 | common_destroy, | |
6cbda6b6 | 585 | cls_destroy, |
1da177e4 LT |
586 | role_destroy, |
587 | type_destroy, | |
588 | user_destroy, | |
589 | cond_destroy_bool, | |
590 | sens_destroy, | |
591 | cat_destroy, | |
592 | }; | |
593 | ||
594 | static void ocontext_destroy(struct ocontext *c, int i) | |
595 | { | |
596 | context_destroy(&c->context[0]); | |
597 | context_destroy(&c->context[1]); | |
598 | if (i == OCON_ISID || i == OCON_FS || | |
599 | i == OCON_NETIF || i == OCON_FSUSE) | |
600 | kfree(c->u.name); | |
601 | kfree(c); | |
602 | } | |
603 | ||
604 | /* | |
605 | * Free any memory allocated by a policy database structure. | |
606 | */ | |
607 | void policydb_destroy(struct policydb *p) | |
608 | { | |
609 | struct ocontext *c, *ctmp; | |
610 | struct genfs *g, *gtmp; | |
611 | int i; | |
782ebb99 SS |
612 | struct role_allow *ra, *lra = NULL; |
613 | struct role_trans *tr, *ltr = NULL; | |
614 | struct range_trans *rt, *lrt = NULL; | |
1da177e4 LT |
615 | |
616 | for (i = 0; i < SYM_NUM; i++) { | |
9dc99780 | 617 | cond_resched(); |
1da177e4 LT |
618 | hashtab_map(p->symtab[i].table, destroy_f[i], NULL); |
619 | hashtab_destroy(p->symtab[i].table); | |
620 | } | |
621 | ||
9a5f04bf JJ |
622 | for (i = 0; i < SYM_NUM; i++) |
623 | kfree(p->sym_val_to_name[i]); | |
1da177e4 | 624 | |
9a5f04bf JJ |
625 | kfree(p->class_val_to_struct); |
626 | kfree(p->role_val_to_struct); | |
627 | kfree(p->user_val_to_struct); | |
1da177e4 LT |
628 | |
629 | avtab_destroy(&p->te_avtab); | |
630 | ||
631 | for (i = 0; i < OCON_NUM; i++) { | |
9dc99780 | 632 | cond_resched(); |
1da177e4 LT |
633 | c = p->ocontexts[i]; |
634 | while (c) { | |
635 | ctmp = c; | |
636 | c = c->next; | |
637 | ocontext_destroy(ctmp,i); | |
638 | } | |
6e8c751e | 639 | p->ocontexts[i] = NULL; |
1da177e4 LT |
640 | } |
641 | ||
642 | g = p->genfs; | |
643 | while (g) { | |
9dc99780 | 644 | cond_resched(); |
1da177e4 LT |
645 | kfree(g->fstype); |
646 | c = g->head; | |
647 | while (c) { | |
648 | ctmp = c; | |
649 | c = c->next; | |
650 | ocontext_destroy(ctmp,OCON_FSUSE); | |
651 | } | |
652 | gtmp = g; | |
653 | g = g->next; | |
654 | kfree(gtmp); | |
655 | } | |
6e8c751e | 656 | p->genfs = NULL; |
1da177e4 LT |
657 | |
658 | cond_policydb_destroy(p); | |
659 | ||
782ebb99 | 660 | for (tr = p->role_tr; tr; tr = tr->next) { |
9dc99780 | 661 | cond_resched(); |
a7f988ba | 662 | kfree(ltr); |
782ebb99 SS |
663 | ltr = tr; |
664 | } | |
a7f988ba | 665 | kfree(ltr); |
782ebb99 SS |
666 | |
667 | for (ra = p->role_allow; ra; ra = ra -> next) { | |
9dc99780 | 668 | cond_resched(); |
a7f988ba | 669 | kfree(lra); |
782ebb99 SS |
670 | lra = ra; |
671 | } | |
a7f988ba | 672 | kfree(lra); |
782ebb99 SS |
673 | |
674 | for (rt = p->range_tr; rt; rt = rt -> next) { | |
9dc99780 | 675 | cond_resched(); |
ddccef3b | 676 | if (lrt) { |
f3f87714 DG |
677 | ebitmap_destroy(&lrt->target_range.level[0].cat); |
678 | ebitmap_destroy(&lrt->target_range.level[1].cat); | |
ddccef3b DG |
679 | kfree(lrt); |
680 | } | |
782ebb99 SS |
681 | lrt = rt; |
682 | } | |
ddccef3b | 683 | if (lrt) { |
f3f87714 DG |
684 | ebitmap_destroy(&lrt->target_range.level[0].cat); |
685 | ebitmap_destroy(&lrt->target_range.level[1].cat); | |
ddccef3b DG |
686 | kfree(lrt); |
687 | } | |
782ebb99 | 688 | |
282c1f5e SS |
689 | if (p->type_attr_map) { |
690 | for (i = 0; i < p->p_types.nprim; i++) | |
691 | ebitmap_destroy(&p->type_attr_map[i]); | |
692 | } | |
782ebb99 | 693 | kfree(p->type_attr_map); |
3f12070e | 694 | kfree(p->undefined_perms); |
3bb56b25 | 695 | ebitmap_destroy(&p->policycaps); |
64dbf074 | 696 | ebitmap_destroy(&p->permissive_map); |
3f12070e | 697 | |
1da177e4 LT |
698 | return; |
699 | } | |
700 | ||
701 | /* | |
702 | * Load the initial SIDs specified in a policy database | |
703 | * structure into a SID table. | |
704 | */ | |
705 | int policydb_load_isids(struct policydb *p, struct sidtab *s) | |
706 | { | |
707 | struct ocontext *head, *c; | |
708 | int rc; | |
709 | ||
710 | rc = sidtab_init(s); | |
711 | if (rc) { | |
454d972c | 712 | printk(KERN_ERR "SELinux: out of memory on SID table init\n"); |
1da177e4 LT |
713 | goto out; |
714 | } | |
715 | ||
716 | head = p->ocontexts[OCON_ISID]; | |
717 | for (c = head; c; c = c->next) { | |
718 | if (!c->context[0].user) { | |
454d972c | 719 | printk(KERN_ERR "SELinux: SID %s was never " |
1da177e4 LT |
720 | "defined.\n", c->u.name); |
721 | rc = -EINVAL; | |
722 | goto out; | |
723 | } | |
724 | if (sidtab_insert(s, c->sid[0], &c->context[0])) { | |
454d972c | 725 | printk(KERN_ERR "SELinux: unable to load initial " |
1da177e4 LT |
726 | "SID %s.\n", c->u.name); |
727 | rc = -EINVAL; | |
728 | goto out; | |
729 | } | |
730 | } | |
731 | out: | |
732 | return rc; | |
733 | } | |
734 | ||
45e5421e SS |
735 | int policydb_class_isvalid(struct policydb *p, unsigned int class) |
736 | { | |
737 | if (!class || class > p->p_classes.nprim) | |
738 | return 0; | |
739 | return 1; | |
740 | } | |
741 | ||
742 | int policydb_role_isvalid(struct policydb *p, unsigned int role) | |
743 | { | |
744 | if (!role || role > p->p_roles.nprim) | |
745 | return 0; | |
746 | return 1; | |
747 | } | |
748 | ||
749 | int policydb_type_isvalid(struct policydb *p, unsigned int type) | |
750 | { | |
751 | if (!type || type > p->p_types.nprim) | |
752 | return 0; | |
753 | return 1; | |
754 | } | |
755 | ||
1da177e4 LT |
756 | /* |
757 | * Return 1 if the fields in the security context | |
758 | * structure `c' are valid. Return 0 otherwise. | |
759 | */ | |
760 | int policydb_context_isvalid(struct policydb *p, struct context *c) | |
761 | { | |
762 | struct role_datum *role; | |
763 | struct user_datum *usrdatum; | |
764 | ||
765 | if (!c->role || c->role > p->p_roles.nprim) | |
766 | return 0; | |
767 | ||
768 | if (!c->user || c->user > p->p_users.nprim) | |
769 | return 0; | |
770 | ||
771 | if (!c->type || c->type > p->p_types.nprim) | |
772 | return 0; | |
773 | ||
774 | if (c->role != OBJECT_R_VAL) { | |
775 | /* | |
776 | * Role must be authorized for the type. | |
777 | */ | |
778 | role = p->role_val_to_struct[c->role - 1]; | |
779 | if (!ebitmap_get_bit(&role->types, | |
780 | c->type - 1)) | |
781 | /* role may not be associated with type */ | |
782 | return 0; | |
783 | ||
784 | /* | |
785 | * User must be authorized for the role. | |
786 | */ | |
787 | usrdatum = p->user_val_to_struct[c->user - 1]; | |
788 | if (!usrdatum) | |
789 | return 0; | |
790 | ||
791 | if (!ebitmap_get_bit(&usrdatum->roles, | |
792 | c->role - 1)) | |
793 | /* user may not be associated with role */ | |
794 | return 0; | |
795 | } | |
796 | ||
797 | if (!mls_context_isvalid(p, c)) | |
798 | return 0; | |
799 | ||
800 | return 1; | |
801 | } | |
802 | ||
803 | /* | |
804 | * Read a MLS range structure from a policydb binary | |
805 | * representation file. | |
806 | */ | |
807 | static int mls_read_range_helper(struct mls_range *r, void *fp) | |
808 | { | |
b5bf6c55 AD |
809 | __le32 buf[2]; |
810 | u32 items; | |
1da177e4 LT |
811 | int rc; |
812 | ||
813 | rc = next_entry(buf, fp, sizeof(u32)); | |
814 | if (rc < 0) | |
815 | goto out; | |
816 | ||
817 | items = le32_to_cpu(buf[0]); | |
818 | if (items > ARRAY_SIZE(buf)) { | |
454d972c | 819 | printk(KERN_ERR "SELinux: mls: range overflow\n"); |
1da177e4 LT |
820 | rc = -EINVAL; |
821 | goto out; | |
822 | } | |
823 | rc = next_entry(buf, fp, sizeof(u32) * items); | |
824 | if (rc < 0) { | |
454d972c | 825 | printk(KERN_ERR "SELinux: mls: truncated range\n"); |
1da177e4 LT |
826 | goto out; |
827 | } | |
828 | r->level[0].sens = le32_to_cpu(buf[0]); | |
829 | if (items > 1) | |
830 | r->level[1].sens = le32_to_cpu(buf[1]); | |
831 | else | |
832 | r->level[1].sens = r->level[0].sens; | |
833 | ||
834 | rc = ebitmap_read(&r->level[0].cat, fp); | |
835 | if (rc) { | |
454d972c | 836 | printk(KERN_ERR "SELinux: mls: error reading low " |
1da177e4 LT |
837 | "categories\n"); |
838 | goto out; | |
839 | } | |
840 | if (items > 1) { | |
841 | rc = ebitmap_read(&r->level[1].cat, fp); | |
842 | if (rc) { | |
454d972c | 843 | printk(KERN_ERR "SELinux: mls: error reading high " |
1da177e4 LT |
844 | "categories\n"); |
845 | goto bad_high; | |
846 | } | |
847 | } else { | |
848 | rc = ebitmap_cpy(&r->level[1].cat, &r->level[0].cat); | |
849 | if (rc) { | |
454d972c | 850 | printk(KERN_ERR "SELinux: mls: out of memory\n"); |
1da177e4 LT |
851 | goto bad_high; |
852 | } | |
853 | } | |
854 | ||
855 | rc = 0; | |
856 | out: | |
857 | return rc; | |
858 | bad_high: | |
859 | ebitmap_destroy(&r->level[0].cat); | |
860 | goto out; | |
861 | } | |
862 | ||
863 | /* | |
864 | * Read and validate a security context structure | |
865 | * from a policydb binary representation file. | |
866 | */ | |
867 | static int context_read_and_validate(struct context *c, | |
868 | struct policydb *p, | |
869 | void *fp) | |
870 | { | |
b5bf6c55 | 871 | __le32 buf[3]; |
1da177e4 LT |
872 | int rc; |
873 | ||
874 | rc = next_entry(buf, fp, sizeof buf); | |
875 | if (rc < 0) { | |
454d972c | 876 | printk(KERN_ERR "SELinux: context truncated\n"); |
1da177e4 LT |
877 | goto out; |
878 | } | |
879 | c->user = le32_to_cpu(buf[0]); | |
880 | c->role = le32_to_cpu(buf[1]); | |
881 | c->type = le32_to_cpu(buf[2]); | |
882 | if (p->policyvers >= POLICYDB_VERSION_MLS) { | |
883 | if (mls_read_range_helper(&c->range, fp)) { | |
454d972c | 884 | printk(KERN_ERR "SELinux: error reading MLS range of " |
1da177e4 LT |
885 | "context\n"); |
886 | rc = -EINVAL; | |
887 | goto out; | |
888 | } | |
889 | } | |
890 | ||
891 | if (!policydb_context_isvalid(p, c)) { | |
454d972c | 892 | printk(KERN_ERR "SELinux: invalid security context\n"); |
1da177e4 LT |
893 | context_destroy(c); |
894 | rc = -EINVAL; | |
895 | } | |
896 | out: | |
897 | return rc; | |
898 | } | |
899 | ||
900 | /* | |
901 | * The following *_read functions are used to | |
902 | * read the symbol data from a policy database | |
903 | * binary representation file. | |
904 | */ | |
905 | ||
906 | static int perm_read(struct policydb *p, struct hashtab *h, void *fp) | |
907 | { | |
908 | char *key = NULL; | |
909 | struct perm_datum *perdatum; | |
910 | int rc; | |
b5bf6c55 AD |
911 | __le32 buf[2]; |
912 | u32 len; | |
1da177e4 | 913 | |
89d155ef | 914 | perdatum = kzalloc(sizeof(*perdatum), GFP_KERNEL); |
1da177e4 LT |
915 | if (!perdatum) { |
916 | rc = -ENOMEM; | |
917 | goto out; | |
918 | } | |
1da177e4 LT |
919 | |
920 | rc = next_entry(buf, fp, sizeof buf); | |
921 | if (rc < 0) | |
922 | goto bad; | |
923 | ||
924 | len = le32_to_cpu(buf[0]); | |
925 | perdatum->value = le32_to_cpu(buf[1]); | |
926 | ||
927 | key = kmalloc(len + 1,GFP_KERNEL); | |
928 | if (!key) { | |
929 | rc = -ENOMEM; | |
930 | goto bad; | |
931 | } | |
932 | rc = next_entry(key, fp, len); | |
933 | if (rc < 0) | |
934 | goto bad; | |
935 | key[len] = 0; | |
936 | ||
937 | rc = hashtab_insert(h, key, perdatum); | |
938 | if (rc) | |
939 | goto bad; | |
940 | out: | |
941 | return rc; | |
942 | bad: | |
943 | perm_destroy(key, perdatum, NULL); | |
944 | goto out; | |
945 | } | |
946 | ||
947 | static int common_read(struct policydb *p, struct hashtab *h, void *fp) | |
948 | { | |
949 | char *key = NULL; | |
950 | struct common_datum *comdatum; | |
b5bf6c55 AD |
951 | __le32 buf[4]; |
952 | u32 len, nel; | |
1da177e4 LT |
953 | int i, rc; |
954 | ||
89d155ef | 955 | comdatum = kzalloc(sizeof(*comdatum), GFP_KERNEL); |
1da177e4 LT |
956 | if (!comdatum) { |
957 | rc = -ENOMEM; | |
958 | goto out; | |
959 | } | |
1da177e4 LT |
960 | |
961 | rc = next_entry(buf, fp, sizeof buf); | |
962 | if (rc < 0) | |
963 | goto bad; | |
964 | ||
965 | len = le32_to_cpu(buf[0]); | |
966 | comdatum->value = le32_to_cpu(buf[1]); | |
967 | ||
968 | rc = symtab_init(&comdatum->permissions, PERM_SYMTAB_SIZE); | |
969 | if (rc) | |
970 | goto bad; | |
971 | comdatum->permissions.nprim = le32_to_cpu(buf[2]); | |
972 | nel = le32_to_cpu(buf[3]); | |
973 | ||
974 | key = kmalloc(len + 1,GFP_KERNEL); | |
975 | if (!key) { | |
976 | rc = -ENOMEM; | |
977 | goto bad; | |
978 | } | |
979 | rc = next_entry(key, fp, len); | |
980 | if (rc < 0) | |
981 | goto bad; | |
982 | key[len] = 0; | |
983 | ||
984 | for (i = 0; i < nel; i++) { | |
985 | rc = perm_read(p, comdatum->permissions.table, fp); | |
986 | if (rc) | |
987 | goto bad; | |
988 | } | |
989 | ||
990 | rc = hashtab_insert(h, key, comdatum); | |
991 | if (rc) | |
992 | goto bad; | |
993 | out: | |
994 | return rc; | |
995 | bad: | |
996 | common_destroy(key, comdatum, NULL); | |
997 | goto out; | |
998 | } | |
999 | ||
1000 | static int read_cons_helper(struct constraint_node **nodep, int ncons, | |
1001 | int allowxtarget, void *fp) | |
1002 | { | |
1003 | struct constraint_node *c, *lc; | |
1004 | struct constraint_expr *e, *le; | |
b5bf6c55 AD |
1005 | __le32 buf[3]; |
1006 | u32 nexpr; | |
1da177e4 LT |
1007 | int rc, i, j, depth; |
1008 | ||
1009 | lc = NULL; | |
1010 | for (i = 0; i < ncons; i++) { | |
89d155ef | 1011 | c = kzalloc(sizeof(*c), GFP_KERNEL); |
1da177e4 LT |
1012 | if (!c) |
1013 | return -ENOMEM; | |
1da177e4 LT |
1014 | |
1015 | if (lc) { | |
1016 | lc->next = c; | |
1017 | } else { | |
1018 | *nodep = c; | |
1019 | } | |
1020 | ||
1021 | rc = next_entry(buf, fp, (sizeof(u32) * 2)); | |
1022 | if (rc < 0) | |
1023 | return rc; | |
1024 | c->permissions = le32_to_cpu(buf[0]); | |
1025 | nexpr = le32_to_cpu(buf[1]); | |
1026 | le = NULL; | |
1027 | depth = -1; | |
1028 | for (j = 0; j < nexpr; j++) { | |
89d155ef | 1029 | e = kzalloc(sizeof(*e), GFP_KERNEL); |
1da177e4 LT |
1030 | if (!e) |
1031 | return -ENOMEM; | |
1da177e4 LT |
1032 | |
1033 | if (le) { | |
1034 | le->next = e; | |
1035 | } else { | |
1036 | c->expr = e; | |
1037 | } | |
1038 | ||
1039 | rc = next_entry(buf, fp, (sizeof(u32) * 3)); | |
1040 | if (rc < 0) | |
1041 | return rc; | |
1042 | e->expr_type = le32_to_cpu(buf[0]); | |
1043 | e->attr = le32_to_cpu(buf[1]); | |
1044 | e->op = le32_to_cpu(buf[2]); | |
1045 | ||
1046 | switch (e->expr_type) { | |
1047 | case CEXPR_NOT: | |
1048 | if (depth < 0) | |
1049 | return -EINVAL; | |
1050 | break; | |
1051 | case CEXPR_AND: | |
1052 | case CEXPR_OR: | |
1053 | if (depth < 1) | |
1054 | return -EINVAL; | |
1055 | depth--; | |
1056 | break; | |
1057 | case CEXPR_ATTR: | |
1058 | if (depth == (CEXPR_MAXDEPTH - 1)) | |
1059 | return -EINVAL; | |
1060 | depth++; | |
1061 | break; | |
1062 | case CEXPR_NAMES: | |
1063 | if (!allowxtarget && (e->attr & CEXPR_XTARGET)) | |
1064 | return -EINVAL; | |
1065 | if (depth == (CEXPR_MAXDEPTH - 1)) | |
1066 | return -EINVAL; | |
1067 | depth++; | |
1068 | if (ebitmap_read(&e->names, fp)) | |
1069 | return -EINVAL; | |
1070 | break; | |
1071 | default: | |
1072 | return -EINVAL; | |
1073 | } | |
1074 | le = e; | |
1075 | } | |
1076 | if (depth != 0) | |
1077 | return -EINVAL; | |
1078 | lc = c; | |
1079 | } | |
1080 | ||
1081 | return 0; | |
1082 | } | |
1083 | ||
1084 | static int class_read(struct policydb *p, struct hashtab *h, void *fp) | |
1085 | { | |
1086 | char *key = NULL; | |
1087 | struct class_datum *cladatum; | |
b5bf6c55 AD |
1088 | __le32 buf[6]; |
1089 | u32 len, len2, ncons, nel; | |
1da177e4 LT |
1090 | int i, rc; |
1091 | ||
89d155ef | 1092 | cladatum = kzalloc(sizeof(*cladatum), GFP_KERNEL); |
1da177e4 LT |
1093 | if (!cladatum) { |
1094 | rc = -ENOMEM; | |
1095 | goto out; | |
1096 | } | |
1da177e4 LT |
1097 | |
1098 | rc = next_entry(buf, fp, sizeof(u32)*6); | |
1099 | if (rc < 0) | |
1100 | goto bad; | |
1101 | ||
1102 | len = le32_to_cpu(buf[0]); | |
1103 | len2 = le32_to_cpu(buf[1]); | |
1104 | cladatum->value = le32_to_cpu(buf[2]); | |
1105 | ||
1106 | rc = symtab_init(&cladatum->permissions, PERM_SYMTAB_SIZE); | |
1107 | if (rc) | |
1108 | goto bad; | |
1109 | cladatum->permissions.nprim = le32_to_cpu(buf[3]); | |
1110 | nel = le32_to_cpu(buf[4]); | |
1111 | ||
1112 | ncons = le32_to_cpu(buf[5]); | |
1113 | ||
1114 | key = kmalloc(len + 1,GFP_KERNEL); | |
1115 | if (!key) { | |
1116 | rc = -ENOMEM; | |
1117 | goto bad; | |
1118 | } | |
1119 | rc = next_entry(key, fp, len); | |
1120 | if (rc < 0) | |
1121 | goto bad; | |
1122 | key[len] = 0; | |
1123 | ||
1124 | if (len2) { | |
1125 | cladatum->comkey = kmalloc(len2 + 1,GFP_KERNEL); | |
1126 | if (!cladatum->comkey) { | |
1127 | rc = -ENOMEM; | |
1128 | goto bad; | |
1129 | } | |
1130 | rc = next_entry(cladatum->comkey, fp, len2); | |
1131 | if (rc < 0) | |
1132 | goto bad; | |
1133 | cladatum->comkey[len2] = 0; | |
1134 | ||
1135 | cladatum->comdatum = hashtab_search(p->p_commons.table, | |
1136 | cladatum->comkey); | |
1137 | if (!cladatum->comdatum) { | |
454d972c | 1138 | printk(KERN_ERR "SELinux: unknown common %s\n", |
1da177e4 LT |
1139 | cladatum->comkey); |
1140 | rc = -EINVAL; | |
1141 | goto bad; | |
1142 | } | |
1143 | } | |
1144 | for (i = 0; i < nel; i++) { | |
1145 | rc = perm_read(p, cladatum->permissions.table, fp); | |
1146 | if (rc) | |
1147 | goto bad; | |
1148 | } | |
1149 | ||
1150 | rc = read_cons_helper(&cladatum->constraints, ncons, 0, fp); | |
1151 | if (rc) | |
1152 | goto bad; | |
1153 | ||
1154 | if (p->policyvers >= POLICYDB_VERSION_VALIDATETRANS) { | |
1155 | /* grab the validatetrans rules */ | |
1156 | rc = next_entry(buf, fp, sizeof(u32)); | |
1157 | if (rc < 0) | |
1158 | goto bad; | |
1159 | ncons = le32_to_cpu(buf[0]); | |
1160 | rc = read_cons_helper(&cladatum->validatetrans, ncons, 1, fp); | |
1161 | if (rc) | |
1162 | goto bad; | |
1163 | } | |
1164 | ||
1165 | rc = hashtab_insert(h, key, cladatum); | |
1166 | if (rc) | |
1167 | goto bad; | |
1168 | ||
1169 | rc = 0; | |
1170 | out: | |
1171 | return rc; | |
1172 | bad: | |
6cbda6b6 | 1173 | cls_destroy(key, cladatum, NULL); |
1da177e4 LT |
1174 | goto out; |
1175 | } | |
1176 | ||
1177 | static int role_read(struct policydb *p, struct hashtab *h, void *fp) | |
1178 | { | |
1179 | char *key = NULL; | |
1180 | struct role_datum *role; | |
1181 | int rc; | |
b5bf6c55 AD |
1182 | __le32 buf[2]; |
1183 | u32 len; | |
1da177e4 | 1184 | |
89d155ef | 1185 | role = kzalloc(sizeof(*role), GFP_KERNEL); |
1da177e4 LT |
1186 | if (!role) { |
1187 | rc = -ENOMEM; | |
1188 | goto out; | |
1189 | } | |
1da177e4 LT |
1190 | |
1191 | rc = next_entry(buf, fp, sizeof buf); | |
1192 | if (rc < 0) | |
1193 | goto bad; | |
1194 | ||
1195 | len = le32_to_cpu(buf[0]); | |
1196 | role->value = le32_to_cpu(buf[1]); | |
1197 | ||
1198 | key = kmalloc(len + 1,GFP_KERNEL); | |
1199 | if (!key) { | |
1200 | rc = -ENOMEM; | |
1201 | goto bad; | |
1202 | } | |
1203 | rc = next_entry(key, fp, len); | |
1204 | if (rc < 0) | |
1205 | goto bad; | |
1206 | key[len] = 0; | |
1207 | ||
1208 | rc = ebitmap_read(&role->dominates, fp); | |
1209 | if (rc) | |
1210 | goto bad; | |
1211 | ||
1212 | rc = ebitmap_read(&role->types, fp); | |
1213 | if (rc) | |
1214 | goto bad; | |
1215 | ||
1216 | if (strcmp(key, OBJECT_R) == 0) { | |
1217 | if (role->value != OBJECT_R_VAL) { | |
1218 | printk(KERN_ERR "Role %s has wrong value %d\n", | |
1219 | OBJECT_R, role->value); | |
1220 | rc = -EINVAL; | |
1221 | goto bad; | |
1222 | } | |
1223 | rc = 0; | |
1224 | goto bad; | |
1225 | } | |
1226 | ||
1227 | rc = hashtab_insert(h, key, role); | |
1228 | if (rc) | |
1229 | goto bad; | |
1230 | out: | |
1231 | return rc; | |
1232 | bad: | |
1233 | role_destroy(key, role, NULL); | |
1234 | goto out; | |
1235 | } | |
1236 | ||
1237 | static int type_read(struct policydb *p, struct hashtab *h, void *fp) | |
1238 | { | |
1239 | char *key = NULL; | |
1240 | struct type_datum *typdatum; | |
1241 | int rc; | |
b5bf6c55 AD |
1242 | __le32 buf[3]; |
1243 | u32 len; | |
1da177e4 | 1244 | |
89d155ef | 1245 | typdatum = kzalloc(sizeof(*typdatum),GFP_KERNEL); |
1da177e4 LT |
1246 | if (!typdatum) { |
1247 | rc = -ENOMEM; | |
1248 | return rc; | |
1249 | } | |
1da177e4 LT |
1250 | |
1251 | rc = next_entry(buf, fp, sizeof buf); | |
1252 | if (rc < 0) | |
1253 | goto bad; | |
1254 | ||
1255 | len = le32_to_cpu(buf[0]); | |
1256 | typdatum->value = le32_to_cpu(buf[1]); | |
1257 | typdatum->primary = le32_to_cpu(buf[2]); | |
1258 | ||
1259 | key = kmalloc(len + 1,GFP_KERNEL); | |
1260 | if (!key) { | |
1261 | rc = -ENOMEM; | |
1262 | goto bad; | |
1263 | } | |
1264 | rc = next_entry(key, fp, len); | |
1265 | if (rc < 0) | |
1266 | goto bad; | |
1267 | key[len] = 0; | |
1268 | ||
1269 | rc = hashtab_insert(h, key, typdatum); | |
1270 | if (rc) | |
1271 | goto bad; | |
1272 | out: | |
1273 | return rc; | |
1274 | bad: | |
1275 | type_destroy(key, typdatum, NULL); | |
1276 | goto out; | |
1277 | } | |
1278 | ||
1279 | ||
1280 | /* | |
1281 | * Read a MLS level structure from a policydb binary | |
1282 | * representation file. | |
1283 | */ | |
1284 | static int mls_read_level(struct mls_level *lp, void *fp) | |
1285 | { | |
b5bf6c55 | 1286 | __le32 buf[1]; |
1da177e4 LT |
1287 | int rc; |
1288 | ||
1289 | memset(lp, 0, sizeof(*lp)); | |
1290 | ||
1291 | rc = next_entry(buf, fp, sizeof buf); | |
1292 | if (rc < 0) { | |
454d972c | 1293 | printk(KERN_ERR "SELinux: mls: truncated level\n"); |
1da177e4 LT |
1294 | goto bad; |
1295 | } | |
1296 | lp->sens = le32_to_cpu(buf[0]); | |
1297 | ||
1298 | if (ebitmap_read(&lp->cat, fp)) { | |
454d972c | 1299 | printk(KERN_ERR "SELinux: mls: error reading level " |
1da177e4 LT |
1300 | "categories\n"); |
1301 | goto bad; | |
1302 | } | |
45e5421e | 1303 | |
1da177e4 LT |
1304 | return 0; |
1305 | ||
1306 | bad: | |
1307 | return -EINVAL; | |
1308 | } | |
1309 | ||
1310 | static int user_read(struct policydb *p, struct hashtab *h, void *fp) | |
1311 | { | |
1312 | char *key = NULL; | |
1313 | struct user_datum *usrdatum; | |
1314 | int rc; | |
b5bf6c55 AD |
1315 | __le32 buf[2]; |
1316 | u32 len; | |
1da177e4 | 1317 | |
89d155ef | 1318 | usrdatum = kzalloc(sizeof(*usrdatum), GFP_KERNEL); |
1da177e4 LT |
1319 | if (!usrdatum) { |
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 | usrdatum->value = le32_to_cpu(buf[1]); | |
1330 | ||
1331 | key = kmalloc(len + 1,GFP_KERNEL); | |
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 | rc = ebitmap_read(&usrdatum->roles, fp); | |
1342 | if (rc) | |
1343 | goto bad; | |
1344 | ||
1345 | if (p->policyvers >= POLICYDB_VERSION_MLS) { | |
1346 | rc = mls_read_range_helper(&usrdatum->range, fp); | |
1347 | if (rc) | |
1348 | goto bad; | |
1349 | rc = mls_read_level(&usrdatum->dfltlevel, fp); | |
1350 | if (rc) | |
1351 | goto bad; | |
1352 | } | |
1353 | ||
1354 | rc = hashtab_insert(h, key, usrdatum); | |
1355 | if (rc) | |
1356 | goto bad; | |
1357 | out: | |
1358 | return rc; | |
1359 | bad: | |
1360 | user_destroy(key, usrdatum, NULL); | |
1361 | goto out; | |
1362 | } | |
1363 | ||
1364 | static int sens_read(struct policydb *p, struct hashtab *h, void *fp) | |
1365 | { | |
1366 | char *key = NULL; | |
1367 | struct level_datum *levdatum; | |
1368 | int rc; | |
b5bf6c55 AD |
1369 | __le32 buf[2]; |
1370 | u32 len; | |
1da177e4 | 1371 | |
89d155ef | 1372 | levdatum = kzalloc(sizeof(*levdatum), GFP_ATOMIC); |
1da177e4 LT |
1373 | if (!levdatum) { |
1374 | rc = -ENOMEM; | |
1375 | goto out; | |
1376 | } | |
1da177e4 LT |
1377 | |
1378 | rc = next_entry(buf, fp, sizeof buf); | |
1379 | if (rc < 0) | |
1380 | goto bad; | |
1381 | ||
1382 | len = le32_to_cpu(buf[0]); | |
1383 | levdatum->isalias = le32_to_cpu(buf[1]); | |
1384 | ||
1385 | key = kmalloc(len + 1,GFP_ATOMIC); | |
1386 | if (!key) { | |
1387 | rc = -ENOMEM; | |
1388 | goto bad; | |
1389 | } | |
1390 | rc = next_entry(key, fp, len); | |
1391 | if (rc < 0) | |
1392 | goto bad; | |
1393 | key[len] = 0; | |
1394 | ||
1395 | levdatum->level = kmalloc(sizeof(struct mls_level), GFP_ATOMIC); | |
1396 | if (!levdatum->level) { | |
1397 | rc = -ENOMEM; | |
1398 | goto bad; | |
1399 | } | |
1400 | if (mls_read_level(levdatum->level, fp)) { | |
1401 | rc = -EINVAL; | |
1402 | goto bad; | |
1403 | } | |
1404 | ||
1405 | rc = hashtab_insert(h, key, levdatum); | |
1406 | if (rc) | |
1407 | goto bad; | |
1408 | out: | |
1409 | return rc; | |
1410 | bad: | |
1411 | sens_destroy(key, levdatum, NULL); | |
1412 | goto out; | |
1413 | } | |
1414 | ||
1415 | static int cat_read(struct policydb *p, struct hashtab *h, void *fp) | |
1416 | { | |
1417 | char *key = NULL; | |
1418 | struct cat_datum *catdatum; | |
1419 | int rc; | |
b5bf6c55 AD |
1420 | __le32 buf[3]; |
1421 | u32 len; | |
1da177e4 | 1422 | |
89d155ef | 1423 | catdatum = kzalloc(sizeof(*catdatum), GFP_ATOMIC); |
1da177e4 LT |
1424 | if (!catdatum) { |
1425 | rc = -ENOMEM; | |
1426 | goto out; | |
1427 | } | |
1da177e4 LT |
1428 | |
1429 | rc = next_entry(buf, fp, sizeof buf); | |
1430 | if (rc < 0) | |
1431 | goto bad; | |
1432 | ||
1433 | len = le32_to_cpu(buf[0]); | |
1434 | catdatum->value = le32_to_cpu(buf[1]); | |
1435 | catdatum->isalias = le32_to_cpu(buf[2]); | |
1436 | ||
1437 | key = kmalloc(len + 1,GFP_ATOMIC); | |
1438 | if (!key) { | |
1439 | rc = -ENOMEM; | |
1440 | goto bad; | |
1441 | } | |
1442 | rc = next_entry(key, fp, len); | |
1443 | if (rc < 0) | |
1444 | goto bad; | |
1445 | key[len] = 0; | |
1446 | ||
1447 | rc = hashtab_insert(h, key, catdatum); | |
1448 | if (rc) | |
1449 | goto bad; | |
1450 | out: | |
1451 | return rc; | |
1452 | ||
1453 | bad: | |
1454 | cat_destroy(key, catdatum, NULL); | |
1455 | goto out; | |
1456 | } | |
1457 | ||
1458 | static int (*read_f[SYM_NUM]) (struct policydb *p, struct hashtab *h, void *fp) = | |
1459 | { | |
1460 | common_read, | |
1461 | class_read, | |
1462 | role_read, | |
1463 | type_read, | |
1464 | user_read, | |
1465 | cond_read_bool, | |
1466 | sens_read, | |
1467 | cat_read, | |
1468 | }; | |
1469 | ||
1470 | extern int ss_initialized; | |
1471 | ||
1472 | /* | |
1473 | * Read the configuration data from a policy database binary | |
1474 | * representation file into a policy database structure. | |
1475 | */ | |
1476 | int policydb_read(struct policydb *p, void *fp) | |
1477 | { | |
1478 | struct role_allow *ra, *lra; | |
1479 | struct role_trans *tr, *ltr; | |
1480 | struct ocontext *l, *c, *newc; | |
1481 | struct genfs *genfs_p, *genfs, *newgenfs; | |
1482 | int i, j, rc; | |
b5bf6c55 AD |
1483 | __le32 buf[8]; |
1484 | u32 len, len2, config, nprim, nel, nel2; | |
1da177e4 LT |
1485 | char *policydb_str; |
1486 | struct policydb_compat_info *info; | |
1487 | struct range_trans *rt, *lrt; | |
1488 | ||
1489 | config = 0; | |
1490 | ||
1491 | rc = policydb_init(p); | |
1492 | if (rc) | |
1493 | goto out; | |
1494 | ||
1495 | /* Read the magic number and string length. */ | |
1496 | rc = next_entry(buf, fp, sizeof(u32)* 2); | |
1497 | if (rc < 0) | |
1498 | goto bad; | |
1499 | ||
b5bf6c55 | 1500 | if (le32_to_cpu(buf[0]) != POLICYDB_MAGIC) { |
454d972c | 1501 | printk(KERN_ERR "SELinux: policydb magic number 0x%x does " |
1da177e4 | 1502 | "not match expected magic number 0x%x\n", |
b5bf6c55 | 1503 | le32_to_cpu(buf[0]), POLICYDB_MAGIC); |
1da177e4 LT |
1504 | goto bad; |
1505 | } | |
1506 | ||
b5bf6c55 | 1507 | len = le32_to_cpu(buf[1]); |
1da177e4 | 1508 | if (len != strlen(POLICYDB_STRING)) { |
454d972c | 1509 | printk(KERN_ERR "SELinux: policydb string length %d does not " |
1da177e4 LT |
1510 | "match expected length %Zu\n", |
1511 | len, strlen(POLICYDB_STRING)); | |
1512 | goto bad; | |
1513 | } | |
1514 | policydb_str = kmalloc(len + 1,GFP_KERNEL); | |
1515 | if (!policydb_str) { | |
454d972c | 1516 | printk(KERN_ERR "SELinux: unable to allocate memory for policydb " |
1da177e4 LT |
1517 | "string of length %d\n", len); |
1518 | rc = -ENOMEM; | |
1519 | goto bad; | |
1520 | } | |
1521 | rc = next_entry(policydb_str, fp, len); | |
1522 | if (rc < 0) { | |
454d972c | 1523 | printk(KERN_ERR "SELinux: truncated policydb string identifier\n"); |
1da177e4 LT |
1524 | kfree(policydb_str); |
1525 | goto bad; | |
1526 | } | |
1527 | policydb_str[len] = 0; | |
1528 | if (strcmp(policydb_str, POLICYDB_STRING)) { | |
454d972c | 1529 | printk(KERN_ERR "SELinux: policydb string %s does not match " |
1da177e4 LT |
1530 | "my string %s\n", policydb_str, POLICYDB_STRING); |
1531 | kfree(policydb_str); | |
1532 | goto bad; | |
1533 | } | |
1534 | /* Done with policydb_str. */ | |
1535 | kfree(policydb_str); | |
1536 | policydb_str = NULL; | |
1537 | ||
1538 | /* Read the version, config, and table sizes. */ | |
1539 | rc = next_entry(buf, fp, sizeof(u32)*4); | |
1540 | if (rc < 0) | |
1541 | goto bad; | |
1da177e4 | 1542 | |
b5bf6c55 | 1543 | p->policyvers = le32_to_cpu(buf[0]); |
1da177e4 LT |
1544 | if (p->policyvers < POLICYDB_VERSION_MIN || |
1545 | p->policyvers > POLICYDB_VERSION_MAX) { | |
454d972c | 1546 | printk(KERN_ERR "SELinux: policydb version %d does not match " |
1da177e4 | 1547 | "my version range %d-%d\n", |
b5bf6c55 | 1548 | le32_to_cpu(buf[0]), POLICYDB_VERSION_MIN, POLICYDB_VERSION_MAX); |
1da177e4 LT |
1549 | goto bad; |
1550 | } | |
1551 | ||
b5bf6c55 | 1552 | if ((le32_to_cpu(buf[1]) & POLICYDB_CONFIG_MLS)) { |
1da177e4 LT |
1553 | if (ss_initialized && !selinux_mls_enabled) { |
1554 | printk(KERN_ERR "Cannot switch between non-MLS and MLS " | |
1555 | "policies\n"); | |
1556 | goto bad; | |
1557 | } | |
1558 | selinux_mls_enabled = 1; | |
1559 | config |= POLICYDB_CONFIG_MLS; | |
1560 | ||
1561 | if (p->policyvers < POLICYDB_VERSION_MLS) { | |
1562 | printk(KERN_ERR "security policydb version %d (MLS) " | |
1563 | "not backwards compatible\n", p->policyvers); | |
1564 | goto bad; | |
1565 | } | |
1566 | } else { | |
1567 | if (ss_initialized && selinux_mls_enabled) { | |
1568 | printk(KERN_ERR "Cannot switch between MLS and non-MLS " | |
1569 | "policies\n"); | |
1570 | goto bad; | |
1571 | } | |
1572 | } | |
3f12070e EP |
1573 | p->reject_unknown = !!(le32_to_cpu(buf[1]) & REJECT_UNKNOWN); |
1574 | p->allow_unknown = !!(le32_to_cpu(buf[1]) & ALLOW_UNKNOWN); | |
1da177e4 | 1575 | |
3bb56b25 PM |
1576 | if (p->policyvers >= POLICYDB_VERSION_POLCAP && |
1577 | ebitmap_read(&p->policycaps, fp) != 0) | |
1578 | goto bad; | |
1579 | ||
64dbf074 EP |
1580 | if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE && |
1581 | ebitmap_read(&p->permissive_map, fp) != 0) | |
1582 | goto bad; | |
1583 | ||
1da177e4 LT |
1584 | info = policydb_lookup_compat(p->policyvers); |
1585 | if (!info) { | |
454d972c | 1586 | printk(KERN_ERR "SELinux: unable to find policy compat info " |
1da177e4 LT |
1587 | "for version %d\n", p->policyvers); |
1588 | goto bad; | |
1589 | } | |
1590 | ||
b5bf6c55 AD |
1591 | if (le32_to_cpu(buf[2]) != info->sym_num || |
1592 | le32_to_cpu(buf[3]) != info->ocon_num) { | |
454d972c | 1593 | printk(KERN_ERR "SELinux: policydb table sizes (%d,%d) do " |
b5bf6c55 AD |
1594 | "not match mine (%d,%d)\n", le32_to_cpu(buf[2]), |
1595 | le32_to_cpu(buf[3]), | |
1da177e4 LT |
1596 | info->sym_num, info->ocon_num); |
1597 | goto bad; | |
1598 | } | |
1599 | ||
1600 | for (i = 0; i < info->sym_num; i++) { | |
1601 | rc = next_entry(buf, fp, sizeof(u32)*2); | |
1602 | if (rc < 0) | |
1603 | goto bad; | |
1604 | nprim = le32_to_cpu(buf[0]); | |
1605 | nel = le32_to_cpu(buf[1]); | |
1606 | for (j = 0; j < nel; j++) { | |
1607 | rc = read_f[i](p, p->symtab[i].table, fp); | |
1608 | if (rc) | |
1609 | goto bad; | |
1610 | } | |
1611 | ||
1612 | p->symtab[i].nprim = nprim; | |
1613 | } | |
1614 | ||
45e5421e | 1615 | rc = avtab_read(&p->te_avtab, fp, p); |
1da177e4 LT |
1616 | if (rc) |
1617 | goto bad; | |
1618 | ||
1619 | if (p->policyvers >= POLICYDB_VERSION_BOOL) { | |
1620 | rc = cond_read_list(p, fp); | |
1621 | if (rc) | |
1622 | goto bad; | |
1623 | } | |
1624 | ||
1625 | rc = next_entry(buf, fp, sizeof(u32)); | |
1626 | if (rc < 0) | |
1627 | goto bad; | |
1628 | nel = le32_to_cpu(buf[0]); | |
1629 | ltr = NULL; | |
1630 | for (i = 0; i < nel; i++) { | |
89d155ef | 1631 | tr = kzalloc(sizeof(*tr), GFP_KERNEL); |
1da177e4 LT |
1632 | if (!tr) { |
1633 | rc = -ENOMEM; | |
1634 | goto bad; | |
1635 | } | |
1da177e4 LT |
1636 | if (ltr) { |
1637 | ltr->next = tr; | |
1638 | } else { | |
1639 | p->role_tr = tr; | |
1640 | } | |
1641 | rc = next_entry(buf, fp, sizeof(u32)*3); | |
1642 | if (rc < 0) | |
1643 | goto bad; | |
1644 | tr->role = le32_to_cpu(buf[0]); | |
1645 | tr->type = le32_to_cpu(buf[1]); | |
1646 | tr->new_role = le32_to_cpu(buf[2]); | |
45e5421e SS |
1647 | if (!policydb_role_isvalid(p, tr->role) || |
1648 | !policydb_type_isvalid(p, tr->type) || | |
1649 | !policydb_role_isvalid(p, tr->new_role)) { | |
1650 | rc = -EINVAL; | |
1651 | goto bad; | |
1652 | } | |
1da177e4 LT |
1653 | ltr = tr; |
1654 | } | |
1655 | ||
1656 | rc = next_entry(buf, fp, sizeof(u32)); | |
1657 | if (rc < 0) | |
1658 | goto bad; | |
1659 | nel = le32_to_cpu(buf[0]); | |
1660 | lra = NULL; | |
1661 | for (i = 0; i < nel; i++) { | |
89d155ef | 1662 | ra = kzalloc(sizeof(*ra), GFP_KERNEL); |
1da177e4 LT |
1663 | if (!ra) { |
1664 | rc = -ENOMEM; | |
1665 | goto bad; | |
1666 | } | |
1da177e4 LT |
1667 | if (lra) { |
1668 | lra->next = ra; | |
1669 | } else { | |
1670 | p->role_allow = ra; | |
1671 | } | |
1672 | rc = next_entry(buf, fp, sizeof(u32)*2); | |
1673 | if (rc < 0) | |
1674 | goto bad; | |
1675 | ra->role = le32_to_cpu(buf[0]); | |
1676 | ra->new_role = le32_to_cpu(buf[1]); | |
45e5421e SS |
1677 | if (!policydb_role_isvalid(p, ra->role) || |
1678 | !policydb_role_isvalid(p, ra->new_role)) { | |
1679 | rc = -EINVAL; | |
1680 | goto bad; | |
1681 | } | |
1da177e4 LT |
1682 | lra = ra; |
1683 | } | |
1684 | ||
1685 | rc = policydb_index_classes(p); | |
1686 | if (rc) | |
1687 | goto bad; | |
1688 | ||
1689 | rc = policydb_index_others(p); | |
1690 | if (rc) | |
1691 | goto bad; | |
1692 | ||
1693 | for (i = 0; i < info->ocon_num; i++) { | |
1694 | rc = next_entry(buf, fp, sizeof(u32)); | |
1695 | if (rc < 0) | |
1696 | goto bad; | |
1697 | nel = le32_to_cpu(buf[0]); | |
1698 | l = NULL; | |
1699 | for (j = 0; j < nel; j++) { | |
89d155ef | 1700 | c = kzalloc(sizeof(*c), GFP_KERNEL); |
1da177e4 LT |
1701 | if (!c) { |
1702 | rc = -ENOMEM; | |
1703 | goto bad; | |
1704 | } | |
1da177e4 LT |
1705 | if (l) { |
1706 | l->next = c; | |
1707 | } else { | |
1708 | p->ocontexts[i] = c; | |
1709 | } | |
1710 | l = c; | |
1711 | rc = -EINVAL; | |
1712 | switch (i) { | |
1713 | case OCON_ISID: | |
1714 | rc = next_entry(buf, fp, sizeof(u32)); | |
1715 | if (rc < 0) | |
1716 | goto bad; | |
1717 | c->sid[0] = le32_to_cpu(buf[0]); | |
1718 | rc = context_read_and_validate(&c->context[0], p, fp); | |
1719 | if (rc) | |
1720 | goto bad; | |
1721 | break; | |
1722 | case OCON_FS: | |
1723 | case OCON_NETIF: | |
1724 | rc = next_entry(buf, fp, sizeof(u32)); | |
1725 | if (rc < 0) | |
1726 | goto bad; | |
1727 | len = le32_to_cpu(buf[0]); | |
1728 | c->u.name = kmalloc(len + 1,GFP_KERNEL); | |
1729 | if (!c->u.name) { | |
1730 | rc = -ENOMEM; | |
1731 | goto bad; | |
1732 | } | |
1733 | rc = next_entry(c->u.name, fp, len); | |
1734 | if (rc < 0) | |
1735 | goto bad; | |
1736 | c->u.name[len] = 0; | |
1737 | rc = context_read_and_validate(&c->context[0], p, fp); | |
1738 | if (rc) | |
1739 | goto bad; | |
1740 | rc = context_read_and_validate(&c->context[1], p, fp); | |
1741 | if (rc) | |
1742 | goto bad; | |
1743 | break; | |
1744 | case OCON_PORT: | |
1745 | rc = next_entry(buf, fp, sizeof(u32)*3); | |
1746 | if (rc < 0) | |
1747 | goto bad; | |
1748 | c->u.port.protocol = le32_to_cpu(buf[0]); | |
1749 | c->u.port.low_port = le32_to_cpu(buf[1]); | |
1750 | c->u.port.high_port = le32_to_cpu(buf[2]); | |
1751 | rc = context_read_and_validate(&c->context[0], p, fp); | |
1752 | if (rc) | |
1753 | goto bad; | |
1754 | break; | |
1755 | case OCON_NODE: | |
1756 | rc = next_entry(buf, fp, sizeof(u32)* 2); | |
1757 | if (rc < 0) | |
1758 | goto bad; | |
1759 | c->u.node.addr = le32_to_cpu(buf[0]); | |
1760 | c->u.node.mask = le32_to_cpu(buf[1]); | |
1761 | rc = context_read_and_validate(&c->context[0], p, fp); | |
1762 | if (rc) | |
1763 | goto bad; | |
1764 | break; | |
1765 | case OCON_FSUSE: | |
1766 | rc = next_entry(buf, fp, sizeof(u32)*2); | |
1767 | if (rc < 0) | |
1768 | goto bad; | |
1769 | c->v.behavior = le32_to_cpu(buf[0]); | |
1770 | if (c->v.behavior > SECURITY_FS_USE_NONE) | |
1771 | goto bad; | |
1772 | len = le32_to_cpu(buf[1]); | |
1773 | c->u.name = kmalloc(len + 1,GFP_KERNEL); | |
1774 | if (!c->u.name) { | |
1775 | rc = -ENOMEM; | |
1776 | goto bad; | |
1777 | } | |
1778 | rc = next_entry(c->u.name, fp, len); | |
1779 | if (rc < 0) | |
1780 | goto bad; | |
1781 | c->u.name[len] = 0; | |
1782 | rc = context_read_and_validate(&c->context[0], p, fp); | |
1783 | if (rc) | |
1784 | goto bad; | |
1785 | break; | |
1786 | case OCON_NODE6: { | |
1787 | int k; | |
1788 | ||
1789 | rc = next_entry(buf, fp, sizeof(u32) * 8); | |
1790 | if (rc < 0) | |
1791 | goto bad; | |
1792 | for (k = 0; k < 4; k++) | |
1793 | c->u.node6.addr[k] = le32_to_cpu(buf[k]); | |
1794 | for (k = 0; k < 4; k++) | |
1795 | c->u.node6.mask[k] = le32_to_cpu(buf[k+4]); | |
1796 | if (context_read_and_validate(&c->context[0], p, fp)) | |
1797 | goto bad; | |
1798 | break; | |
1799 | } | |
1800 | } | |
1801 | } | |
1802 | } | |
1803 | ||
1804 | rc = next_entry(buf, fp, sizeof(u32)); | |
1805 | if (rc < 0) | |
1806 | goto bad; | |
1807 | nel = le32_to_cpu(buf[0]); | |
1808 | genfs_p = NULL; | |
1809 | rc = -EINVAL; | |
1810 | for (i = 0; i < nel; i++) { | |
1811 | rc = next_entry(buf, fp, sizeof(u32)); | |
1812 | if (rc < 0) | |
1813 | goto bad; | |
1814 | len = le32_to_cpu(buf[0]); | |
89d155ef | 1815 | newgenfs = kzalloc(sizeof(*newgenfs), GFP_KERNEL); |
1da177e4 LT |
1816 | if (!newgenfs) { |
1817 | rc = -ENOMEM; | |
1818 | goto bad; | |
1819 | } | |
1da177e4 LT |
1820 | |
1821 | newgenfs->fstype = kmalloc(len + 1,GFP_KERNEL); | |
1822 | if (!newgenfs->fstype) { | |
1823 | rc = -ENOMEM; | |
1824 | kfree(newgenfs); | |
1825 | goto bad; | |
1826 | } | |
1827 | rc = next_entry(newgenfs->fstype, fp, len); | |
1828 | if (rc < 0) { | |
1829 | kfree(newgenfs->fstype); | |
1830 | kfree(newgenfs); | |
1831 | goto bad; | |
1832 | } | |
1833 | newgenfs->fstype[len] = 0; | |
1834 | for (genfs_p = NULL, genfs = p->genfs; genfs; | |
1835 | genfs_p = genfs, genfs = genfs->next) { | |
1836 | if (strcmp(newgenfs->fstype, genfs->fstype) == 0) { | |
454d972c | 1837 | printk(KERN_ERR "SELinux: dup genfs " |
1da177e4 LT |
1838 | "fstype %s\n", newgenfs->fstype); |
1839 | kfree(newgenfs->fstype); | |
1840 | kfree(newgenfs); | |
1841 | goto bad; | |
1842 | } | |
1843 | if (strcmp(newgenfs->fstype, genfs->fstype) < 0) | |
1844 | break; | |
1845 | } | |
1846 | newgenfs->next = genfs; | |
1847 | if (genfs_p) | |
1848 | genfs_p->next = newgenfs; | |
1849 | else | |
1850 | p->genfs = newgenfs; | |
1851 | rc = next_entry(buf, fp, sizeof(u32)); | |
1852 | if (rc < 0) | |
1853 | goto bad; | |
1854 | nel2 = le32_to_cpu(buf[0]); | |
1855 | for (j = 0; j < nel2; j++) { | |
1856 | rc = next_entry(buf, fp, sizeof(u32)); | |
1857 | if (rc < 0) | |
1858 | goto bad; | |
1859 | len = le32_to_cpu(buf[0]); | |
1860 | ||
89d155ef | 1861 | newc = kzalloc(sizeof(*newc), GFP_KERNEL); |
1da177e4 LT |
1862 | if (!newc) { |
1863 | rc = -ENOMEM; | |
1864 | goto bad; | |
1865 | } | |
1da177e4 LT |
1866 | |
1867 | newc->u.name = kmalloc(len + 1,GFP_KERNEL); | |
1868 | if (!newc->u.name) { | |
1869 | rc = -ENOMEM; | |
1870 | goto bad_newc; | |
1871 | } | |
1872 | rc = next_entry(newc->u.name, fp, len); | |
1873 | if (rc < 0) | |
1874 | goto bad_newc; | |
1875 | newc->u.name[len] = 0; | |
1876 | rc = next_entry(buf, fp, sizeof(u32)); | |
1877 | if (rc < 0) | |
1878 | goto bad_newc; | |
1879 | newc->v.sclass = le32_to_cpu(buf[0]); | |
1880 | if (context_read_and_validate(&newc->context[0], p, fp)) | |
1881 | goto bad_newc; | |
1882 | for (l = NULL, c = newgenfs->head; c; | |
1883 | l = c, c = c->next) { | |
1884 | if (!strcmp(newc->u.name, c->u.name) && | |
1885 | (!c->v.sclass || !newc->v.sclass || | |
1886 | newc->v.sclass == c->v.sclass)) { | |
454d972c | 1887 | printk(KERN_ERR "SELinux: dup genfs " |
1da177e4 LT |
1888 | "entry (%s,%s)\n", |
1889 | newgenfs->fstype, c->u.name); | |
1890 | goto bad_newc; | |
1891 | } | |
1892 | len = strlen(newc->u.name); | |
1893 | len2 = strlen(c->u.name); | |
1894 | if (len > len2) | |
1895 | break; | |
1896 | } | |
1897 | ||
1898 | newc->next = c; | |
1899 | if (l) | |
1900 | l->next = newc; | |
1901 | else | |
1902 | newgenfs->head = newc; | |
1903 | } | |
1904 | } | |
1905 | ||
1906 | if (p->policyvers >= POLICYDB_VERSION_MLS) { | |
f3f87714 | 1907 | int new_rangetr = p->policyvers >= POLICYDB_VERSION_RANGETRANS; |
1da177e4 LT |
1908 | rc = next_entry(buf, fp, sizeof(u32)); |
1909 | if (rc < 0) | |
1910 | goto bad; | |
1911 | nel = le32_to_cpu(buf[0]); | |
1912 | lrt = NULL; | |
1913 | for (i = 0; i < nel; i++) { | |
89d155ef | 1914 | rt = kzalloc(sizeof(*rt), GFP_KERNEL); |
1da177e4 LT |
1915 | if (!rt) { |
1916 | rc = -ENOMEM; | |
1917 | goto bad; | |
1918 | } | |
1da177e4 LT |
1919 | if (lrt) |
1920 | lrt->next = rt; | |
1921 | else | |
1922 | p->range_tr = rt; | |
1923 | rc = next_entry(buf, fp, (sizeof(u32) * 2)); | |
1924 | if (rc < 0) | |
1925 | goto bad; | |
f3f87714 DG |
1926 | rt->source_type = le32_to_cpu(buf[0]); |
1927 | rt->target_type = le32_to_cpu(buf[1]); | |
1928 | if (new_rangetr) { | |
1929 | rc = next_entry(buf, fp, sizeof(u32)); | |
1930 | if (rc < 0) | |
1931 | goto bad; | |
1932 | rt->target_class = le32_to_cpu(buf[0]); | |
1933 | } else | |
1934 | rt->target_class = SECCLASS_PROCESS; | |
45e5421e SS |
1935 | if (!policydb_type_isvalid(p, rt->source_type) || |
1936 | !policydb_type_isvalid(p, rt->target_type) || | |
1937 | !policydb_class_isvalid(p, rt->target_class)) { | |
1938 | rc = -EINVAL; | |
1939 | goto bad; | |
1940 | } | |
f3f87714 | 1941 | rc = mls_read_range_helper(&rt->target_range, fp); |
1da177e4 LT |
1942 | if (rc) |
1943 | goto bad; | |
45e5421e | 1944 | if (!mls_range_isvalid(p, &rt->target_range)) { |
454d972c | 1945 | printk(KERN_WARNING "SELinux: rangetrans: invalid range\n"); |
45e5421e SS |
1946 | goto bad; |
1947 | } | |
1da177e4 LT |
1948 | lrt = rt; |
1949 | } | |
1950 | } | |
1951 | ||
782ebb99 SS |
1952 | p->type_attr_map = kmalloc(p->p_types.nprim*sizeof(struct ebitmap), GFP_KERNEL); |
1953 | if (!p->type_attr_map) | |
1954 | goto bad; | |
1955 | ||
1956 | for (i = 0; i < p->p_types.nprim; i++) { | |
1957 | ebitmap_init(&p->type_attr_map[i]); | |
1958 | if (p->policyvers >= POLICYDB_VERSION_AVTAB) { | |
1959 | if (ebitmap_read(&p->type_attr_map[i], fp)) | |
1960 | goto bad; | |
1961 | } | |
1962 | /* add the type itself as the degenerate case */ | |
1963 | if (ebitmap_set_bit(&p->type_attr_map[i], i, 1)) | |
1964 | goto bad; | |
1965 | } | |
1966 | ||
1da177e4 LT |
1967 | rc = 0; |
1968 | out: | |
1969 | return rc; | |
1970 | bad_newc: | |
1971 | ocontext_destroy(newc,OCON_FSUSE); | |
1972 | bad: | |
1973 | if (!rc) | |
1974 | rc = -EINVAL; | |
1975 | policydb_destroy(p); | |
1976 | goto out; | |
1977 | } |