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 | * | |
2ced3dfd | 14 | * Added conditional policy language extensions |
1da177e4 | 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 | |
2ced3dfd | 24 | * it under the terms of the GNU General Public License as published by |
1da177e4 LT |
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> | |
d9250dea | 33 | #include <linux/audit.h> |
1da177e4 LT |
34 | #include "security.h" |
35 | ||
36 | #include "policydb.h" | |
37 | #include "conditional.h" | |
38 | #include "mls.h" | |
39 | ||
40 | #define _DEBUG_HASHES | |
41 | ||
42 | #ifdef DEBUG_HASHES | |
634a539e | 43 | static const char *symtab_name[SYM_NUM] = { |
1da177e4 LT |
44 | "common prefixes", |
45 | "classes", | |
46 | "roles", | |
47 | "types", | |
48 | "users", | |
49 | "bools", | |
50 | "levels", | |
51 | "categories", | |
52 | }; | |
53 | #endif | |
54 | ||
1da177e4 LT |
55 | static unsigned int symtab_sizes[SYM_NUM] = { |
56 | 2, | |
57 | 32, | |
58 | 16, | |
59 | 512, | |
60 | 128, | |
61 | 16, | |
62 | 16, | |
63 | 16, | |
64 | }; | |
65 | ||
66 | struct policydb_compat_info { | |
67 | int version; | |
68 | int sym_num; | |
69 | int ocon_num; | |
70 | }; | |
71 | ||
72 | /* These need to be updated if SYM_NUM or OCON_NUM changes */ | |
73 | static struct policydb_compat_info policydb_compat[] = { | |
74 | { | |
2ced3dfd EP |
75 | .version = POLICYDB_VERSION_BASE, |
76 | .sym_num = SYM_NUM - 3, | |
77 | .ocon_num = OCON_NUM - 1, | |
1da177e4 LT |
78 | }, |
79 | { | |
2ced3dfd EP |
80 | .version = POLICYDB_VERSION_BOOL, |
81 | .sym_num = SYM_NUM - 2, | |
82 | .ocon_num = OCON_NUM - 1, | |
1da177e4 LT |
83 | }, |
84 | { | |
2ced3dfd EP |
85 | .version = POLICYDB_VERSION_IPV6, |
86 | .sym_num = SYM_NUM - 2, | |
87 | .ocon_num = OCON_NUM, | |
1da177e4 LT |
88 | }, |
89 | { | |
2ced3dfd EP |
90 | .version = POLICYDB_VERSION_NLCLASS, |
91 | .sym_num = SYM_NUM - 2, | |
92 | .ocon_num = OCON_NUM, | |
1da177e4 LT |
93 | }, |
94 | { | |
2ced3dfd EP |
95 | .version = POLICYDB_VERSION_MLS, |
96 | .sym_num = SYM_NUM, | |
97 | .ocon_num = OCON_NUM, | |
1da177e4 | 98 | }, |
782ebb99 | 99 | { |
2ced3dfd EP |
100 | .version = POLICYDB_VERSION_AVTAB, |
101 | .sym_num = SYM_NUM, | |
102 | .ocon_num = OCON_NUM, | |
782ebb99 | 103 | }, |
f3f87714 | 104 | { |
2ced3dfd EP |
105 | .version = POLICYDB_VERSION_RANGETRANS, |
106 | .sym_num = SYM_NUM, | |
107 | .ocon_num = OCON_NUM, | |
f3f87714 | 108 | }, |
3bb56b25 PM |
109 | { |
110 | .version = POLICYDB_VERSION_POLCAP, | |
111 | .sym_num = SYM_NUM, | |
112 | .ocon_num = OCON_NUM, | |
64dbf074 EP |
113 | }, |
114 | { | |
115 | .version = POLICYDB_VERSION_PERMISSIVE, | |
116 | .sym_num = SYM_NUM, | |
117 | .ocon_num = OCON_NUM, | |
d9250dea KK |
118 | }, |
119 | { | |
120 | .version = POLICYDB_VERSION_BOUNDARY, | |
121 | .sym_num = SYM_NUM, | |
122 | .ocon_num = OCON_NUM, | |
123 | }, | |
1da177e4 LT |
124 | }; |
125 | ||
126 | static struct policydb_compat_info *policydb_lookup_compat(int version) | |
127 | { | |
128 | int i; | |
129 | struct policydb_compat_info *info = NULL; | |
130 | ||
32725ad8 | 131 | for (i = 0; i < ARRAY_SIZE(policydb_compat); i++) { |
1da177e4 LT |
132 | if (policydb_compat[i].version == version) { |
133 | info = &policydb_compat[i]; | |
134 | break; | |
135 | } | |
136 | } | |
137 | return info; | |
138 | } | |
139 | ||
140 | /* | |
141 | * Initialize the role table. | |
142 | */ | |
143 | static int roles_init(struct policydb *p) | |
144 | { | |
145 | char *key = NULL; | |
146 | int rc; | |
147 | struct role_datum *role; | |
148 | ||
89d155ef | 149 | role = kzalloc(sizeof(*role), GFP_KERNEL); |
1da177e4 LT |
150 | if (!role) { |
151 | rc = -ENOMEM; | |
152 | goto out; | |
153 | } | |
1da177e4 LT |
154 | role->value = ++p->p_roles.nprim; |
155 | if (role->value != OBJECT_R_VAL) { | |
156 | rc = -EINVAL; | |
157 | goto out_free_role; | |
158 | } | |
b3139bbc | 159 | key = kstrdup(OBJECT_R, GFP_KERNEL); |
1da177e4 LT |
160 | if (!key) { |
161 | rc = -ENOMEM; | |
162 | goto out_free_role; | |
163 | } | |
1da177e4 LT |
164 | rc = hashtab_insert(p->p_roles.table, key, role); |
165 | if (rc) | |
166 | goto out_free_key; | |
167 | out: | |
168 | return rc; | |
169 | ||
170 | out_free_key: | |
171 | kfree(key); | |
172 | out_free_role: | |
173 | kfree(role); | |
174 | goto out; | |
175 | } | |
176 | ||
2f3e82d6 SS |
177 | static u32 rangetr_hash(struct hashtab *h, const void *k) |
178 | { | |
179 | const struct range_trans *key = k; | |
180 | return (key->source_type + (key->target_type << 3) + | |
181 | (key->target_class << 5)) & (h->size - 1); | |
182 | } | |
183 | ||
184 | static int rangetr_cmp(struct hashtab *h, const void *k1, const void *k2) | |
185 | { | |
186 | const struct range_trans *key1 = k1, *key2 = k2; | |
187 | return (key1->source_type != key2->source_type || | |
188 | key1->target_type != key2->target_type || | |
189 | key1->target_class != key2->target_class); | |
190 | } | |
191 | ||
1da177e4 LT |
192 | /* |
193 | * Initialize a policy database structure. | |
194 | */ | |
195 | static int policydb_init(struct policydb *p) | |
196 | { | |
197 | int i, rc; | |
198 | ||
199 | memset(p, 0, sizeof(*p)); | |
200 | ||
201 | for (i = 0; i < SYM_NUM; i++) { | |
202 | rc = symtab_init(&p->symtab[i], symtab_sizes[i]); | |
203 | if (rc) | |
204 | goto out_free_symtab; | |
205 | } | |
206 | ||
207 | rc = avtab_init(&p->te_avtab); | |
208 | if (rc) | |
209 | goto out_free_symtab; | |
210 | ||
211 | rc = roles_init(p); | |
212 | if (rc) | |
3232c110 | 213 | goto out_free_symtab; |
1da177e4 LT |
214 | |
215 | rc = cond_policydb_init(p); | |
216 | if (rc) | |
3232c110 | 217 | goto out_free_symtab; |
1da177e4 | 218 | |
2f3e82d6 SS |
219 | p->range_tr = hashtab_create(rangetr_hash, rangetr_cmp, 256); |
220 | if (!p->range_tr) | |
221 | goto out_free_symtab; | |
222 | ||
3bb56b25 | 223 | ebitmap_init(&p->policycaps); |
64dbf074 | 224 | ebitmap_init(&p->permissive_map); |
3bb56b25 | 225 | |
1da177e4 LT |
226 | out: |
227 | return rc; | |
228 | ||
1da177e4 LT |
229 | out_free_symtab: |
230 | for (i = 0; i < SYM_NUM; i++) | |
231 | hashtab_destroy(p->symtab[i].table); | |
232 | goto out; | |
233 | } | |
234 | ||
235 | /* | |
236 | * The following *_index functions are used to | |
237 | * define the val_to_name and val_to_struct arrays | |
238 | * in a policy database structure. The val_to_name | |
239 | * arrays are used when converting security context | |
240 | * structures into string representations. The | |
241 | * val_to_struct arrays are used when the attributes | |
242 | * of a class, role, or user are needed. | |
243 | */ | |
244 | ||
245 | static int common_index(void *key, void *datum, void *datap) | |
246 | { | |
247 | struct policydb *p; | |
248 | struct common_datum *comdatum; | |
249 | ||
250 | comdatum = datum; | |
251 | p = datap; | |
252 | if (!comdatum->value || comdatum->value > p->p_commons.nprim) | |
253 | return -EINVAL; | |
254 | p->p_common_val_to_name[comdatum->value - 1] = key; | |
255 | return 0; | |
256 | } | |
257 | ||
258 | static int class_index(void *key, void *datum, void *datap) | |
259 | { | |
260 | struct policydb *p; | |
261 | struct class_datum *cladatum; | |
262 | ||
263 | cladatum = datum; | |
264 | p = datap; | |
265 | if (!cladatum->value || cladatum->value > p->p_classes.nprim) | |
266 | return -EINVAL; | |
267 | p->p_class_val_to_name[cladatum->value - 1] = key; | |
268 | p->class_val_to_struct[cladatum->value - 1] = cladatum; | |
269 | return 0; | |
270 | } | |
271 | ||
272 | static int role_index(void *key, void *datum, void *datap) | |
273 | { | |
274 | struct policydb *p; | |
275 | struct role_datum *role; | |
276 | ||
277 | role = datum; | |
278 | p = datap; | |
d9250dea KK |
279 | if (!role->value |
280 | || role->value > p->p_roles.nprim | |
281 | || role->bounds > p->p_roles.nprim) | |
1da177e4 LT |
282 | return -EINVAL; |
283 | p->p_role_val_to_name[role->value - 1] = key; | |
284 | p->role_val_to_struct[role->value - 1] = role; | |
285 | return 0; | |
286 | } | |
287 | ||
288 | static int type_index(void *key, void *datum, void *datap) | |
289 | { | |
290 | struct policydb *p; | |
291 | struct type_datum *typdatum; | |
292 | ||
293 | typdatum = datum; | |
294 | p = datap; | |
295 | ||
296 | if (typdatum->primary) { | |
d9250dea KK |
297 | if (!typdatum->value |
298 | || typdatum->value > p->p_types.nprim | |
299 | || typdatum->bounds > p->p_types.nprim) | |
1da177e4 LT |
300 | return -EINVAL; |
301 | p->p_type_val_to_name[typdatum->value - 1] = key; | |
d9250dea | 302 | p->type_val_to_struct[typdatum->value - 1] = typdatum; |
1da177e4 LT |
303 | } |
304 | ||
305 | return 0; | |
306 | } | |
307 | ||
308 | static int user_index(void *key, void *datum, void *datap) | |
309 | { | |
310 | struct policydb *p; | |
311 | struct user_datum *usrdatum; | |
312 | ||
313 | usrdatum = datum; | |
314 | p = datap; | |
d9250dea KK |
315 | if (!usrdatum->value |
316 | || usrdatum->value > p->p_users.nprim | |
317 | || usrdatum->bounds > p->p_users.nprim) | |
1da177e4 LT |
318 | return -EINVAL; |
319 | p->p_user_val_to_name[usrdatum->value - 1] = key; | |
320 | p->user_val_to_struct[usrdatum->value - 1] = usrdatum; | |
321 | return 0; | |
322 | } | |
323 | ||
324 | static int sens_index(void *key, void *datum, void *datap) | |
325 | { | |
326 | struct policydb *p; | |
327 | struct level_datum *levdatum; | |
328 | ||
329 | levdatum = datum; | |
330 | p = datap; | |
331 | ||
332 | if (!levdatum->isalias) { | |
333 | if (!levdatum->level->sens || | |
334 | levdatum->level->sens > p->p_levels.nprim) | |
335 | return -EINVAL; | |
336 | p->p_sens_val_to_name[levdatum->level->sens - 1] = key; | |
337 | } | |
338 | ||
339 | return 0; | |
340 | } | |
341 | ||
342 | static int cat_index(void *key, void *datum, void *datap) | |
343 | { | |
344 | struct policydb *p; | |
345 | struct cat_datum *catdatum; | |
346 | ||
347 | catdatum = datum; | |
348 | p = datap; | |
349 | ||
350 | if (!catdatum->isalias) { | |
351 | if (!catdatum->value || catdatum->value > p->p_cats.nprim) | |
352 | return -EINVAL; | |
353 | p->p_cat_val_to_name[catdatum->value - 1] = key; | |
354 | } | |
355 | ||
356 | return 0; | |
357 | } | |
358 | ||
359 | static int (*index_f[SYM_NUM]) (void *key, void *datum, void *datap) = | |
360 | { | |
361 | common_index, | |
362 | class_index, | |
363 | role_index, | |
364 | type_index, | |
365 | user_index, | |
366 | cond_index_bool, | |
367 | sens_index, | |
368 | cat_index, | |
369 | }; | |
370 | ||
371 | /* | |
372 | * Define the common val_to_name array and the class | |
373 | * val_to_name and val_to_struct arrays in a policy | |
374 | * database structure. | |
375 | * | |
376 | * Caller must clean up upon failure. | |
377 | */ | |
378 | static int policydb_index_classes(struct policydb *p) | |
379 | { | |
380 | int rc; | |
381 | ||
382 | p->p_common_val_to_name = | |
383 | kmalloc(p->p_commons.nprim * sizeof(char *), GFP_KERNEL); | |
384 | if (!p->p_common_val_to_name) { | |
385 | rc = -ENOMEM; | |
386 | goto out; | |
387 | } | |
388 | ||
389 | rc = hashtab_map(p->p_commons.table, common_index, p); | |
390 | if (rc) | |
391 | goto out; | |
392 | ||
393 | p->class_val_to_struct = | |
394 | kmalloc(p->p_classes.nprim * sizeof(*(p->class_val_to_struct)), GFP_KERNEL); | |
395 | if (!p->class_val_to_struct) { | |
396 | rc = -ENOMEM; | |
397 | goto out; | |
398 | } | |
399 | ||
400 | p->p_class_val_to_name = | |
401 | kmalloc(p->p_classes.nprim * sizeof(char *), GFP_KERNEL); | |
402 | if (!p->p_class_val_to_name) { | |
403 | rc = -ENOMEM; | |
404 | goto out; | |
405 | } | |
406 | ||
407 | rc = hashtab_map(p->p_classes.table, class_index, p); | |
408 | out: | |
409 | return rc; | |
410 | } | |
411 | ||
412 | #ifdef DEBUG_HASHES | |
413 | static void symtab_hash_eval(struct symtab *s) | |
414 | { | |
415 | int i; | |
416 | ||
417 | for (i = 0; i < SYM_NUM; i++) { | |
418 | struct hashtab *h = s[i].table; | |
419 | struct hashtab_info info; | |
420 | ||
421 | hashtab_stat(h, &info); | |
744ba35e | 422 | printk(KERN_DEBUG "SELinux: %s: %d entries and %d/%d buckets used, " |
1da177e4 LT |
423 | "longest chain length %d\n", symtab_name[i], h->nel, |
424 | info.slots_used, h->size, info.max_chain_len); | |
425 | } | |
426 | } | |
2f3e82d6 SS |
427 | |
428 | static void rangetr_hash_eval(struct hashtab *h) | |
429 | { | |
430 | struct hashtab_info info; | |
431 | ||
432 | hashtab_stat(h, &info); | |
433 | printk(KERN_DEBUG "SELinux: rangetr: %d entries and %d/%d buckets used, " | |
434 | "longest chain length %d\n", h->nel, | |
435 | info.slots_used, h->size, info.max_chain_len); | |
436 | } | |
437 | #else | |
438 | static inline void rangetr_hash_eval(struct hashtab *h) | |
439 | { | |
440 | } | |
1da177e4 LT |
441 | #endif |
442 | ||
443 | /* | |
444 | * Define the other val_to_name and val_to_struct arrays | |
445 | * in a policy database structure. | |
446 | * | |
447 | * Caller must clean up on failure. | |
448 | */ | |
449 | static int policydb_index_others(struct policydb *p) | |
450 | { | |
451 | int i, rc = 0; | |
452 | ||
454d972c | 453 | printk(KERN_DEBUG "SELinux: %d users, %d roles, %d types, %d bools", |
1da177e4 | 454 | p->p_users.nprim, p->p_roles.nprim, p->p_types.nprim, p->p_bools.nprim); |
0719aaf5 | 455 | if (p->mls_enabled) |
1da177e4 LT |
456 | printk(", %d sens, %d cats", p->p_levels.nprim, |
457 | p->p_cats.nprim); | |
458 | printk("\n"); | |
459 | ||
454d972c | 460 | printk(KERN_DEBUG "SELinux: %d classes, %d rules\n", |
1da177e4 LT |
461 | p->p_classes.nprim, p->te_avtab.nel); |
462 | ||
463 | #ifdef DEBUG_HASHES | |
464 | avtab_hash_eval(&p->te_avtab, "rules"); | |
465 | symtab_hash_eval(p->symtab); | |
466 | #endif | |
467 | ||
468 | p->role_val_to_struct = | |
469 | kmalloc(p->p_roles.nprim * sizeof(*(p->role_val_to_struct)), | |
2ced3dfd | 470 | GFP_KERNEL); |
1da177e4 LT |
471 | if (!p->role_val_to_struct) { |
472 | rc = -ENOMEM; | |
473 | goto out; | |
474 | } | |
475 | ||
476 | p->user_val_to_struct = | |
477 | kmalloc(p->p_users.nprim * sizeof(*(p->user_val_to_struct)), | |
2ced3dfd | 478 | GFP_KERNEL); |
1da177e4 LT |
479 | if (!p->user_val_to_struct) { |
480 | rc = -ENOMEM; | |
481 | goto out; | |
482 | } | |
483 | ||
d9250dea KK |
484 | p->type_val_to_struct = |
485 | kmalloc(p->p_types.nprim * sizeof(*(p->type_val_to_struct)), | |
486 | GFP_KERNEL); | |
487 | if (!p->type_val_to_struct) { | |
488 | rc = -ENOMEM; | |
489 | goto out; | |
490 | } | |
491 | ||
1da177e4 LT |
492 | if (cond_init_bool_indexes(p)) { |
493 | rc = -ENOMEM; | |
494 | goto out; | |
495 | } | |
496 | ||
497 | for (i = SYM_ROLES; i < SYM_NUM; i++) { | |
498 | p->sym_val_to_name[i] = | |
499 | kmalloc(p->symtab[i].nprim * sizeof(char *), GFP_KERNEL); | |
500 | if (!p->sym_val_to_name[i]) { | |
501 | rc = -ENOMEM; | |
502 | goto out; | |
503 | } | |
504 | rc = hashtab_map(p->symtab[i].table, index_f[i], p); | |
505 | if (rc) | |
506 | goto out; | |
507 | } | |
508 | ||
509 | out: | |
510 | return rc; | |
511 | } | |
512 | ||
513 | /* | |
514 | * The following *_destroy functions are used to | |
515 | * free any memory allocated for each kind of | |
516 | * symbol data in the policy database. | |
517 | */ | |
518 | ||
519 | static int perm_destroy(void *key, void *datum, void *p) | |
520 | { | |
521 | kfree(key); | |
522 | kfree(datum); | |
523 | return 0; | |
524 | } | |
525 | ||
526 | static int common_destroy(void *key, void *datum, void *p) | |
527 | { | |
528 | struct common_datum *comdatum; | |
529 | ||
530 | kfree(key); | |
531 | comdatum = datum; | |
532 | hashtab_map(comdatum->permissions.table, perm_destroy, NULL); | |
533 | hashtab_destroy(comdatum->permissions.table); | |
534 | kfree(datum); | |
535 | return 0; | |
536 | } | |
537 | ||
6cbda6b6 | 538 | static int cls_destroy(void *key, void *datum, void *p) |
1da177e4 LT |
539 | { |
540 | struct class_datum *cladatum; | |
541 | struct constraint_node *constraint, *ctemp; | |
542 | struct constraint_expr *e, *etmp; | |
543 | ||
544 | kfree(key); | |
545 | cladatum = datum; | |
546 | hashtab_map(cladatum->permissions.table, perm_destroy, NULL); | |
547 | hashtab_destroy(cladatum->permissions.table); | |
548 | constraint = cladatum->constraints; | |
549 | while (constraint) { | |
550 | e = constraint->expr; | |
551 | while (e) { | |
552 | ebitmap_destroy(&e->names); | |
553 | etmp = e; | |
554 | e = e->next; | |
555 | kfree(etmp); | |
556 | } | |
557 | ctemp = constraint; | |
558 | constraint = constraint->next; | |
559 | kfree(ctemp); | |
560 | } | |
561 | ||
562 | constraint = cladatum->validatetrans; | |
563 | while (constraint) { | |
564 | e = constraint->expr; | |
565 | while (e) { | |
566 | ebitmap_destroy(&e->names); | |
567 | etmp = e; | |
568 | e = e->next; | |
569 | kfree(etmp); | |
570 | } | |
571 | ctemp = constraint; | |
572 | constraint = constraint->next; | |
573 | kfree(ctemp); | |
574 | } | |
575 | ||
576 | kfree(cladatum->comkey); | |
577 | kfree(datum); | |
578 | return 0; | |
579 | } | |
580 | ||
581 | static int role_destroy(void *key, void *datum, void *p) | |
582 | { | |
583 | struct role_datum *role; | |
584 | ||
585 | kfree(key); | |
586 | role = datum; | |
587 | ebitmap_destroy(&role->dominates); | |
588 | ebitmap_destroy(&role->types); | |
589 | kfree(datum); | |
590 | return 0; | |
591 | } | |
592 | ||
593 | static int type_destroy(void *key, void *datum, void *p) | |
594 | { | |
595 | kfree(key); | |
596 | kfree(datum); | |
597 | return 0; | |
598 | } | |
599 | ||
600 | static int user_destroy(void *key, void *datum, void *p) | |
601 | { | |
602 | struct user_datum *usrdatum; | |
603 | ||
604 | kfree(key); | |
605 | usrdatum = datum; | |
606 | ebitmap_destroy(&usrdatum->roles); | |
607 | ebitmap_destroy(&usrdatum->range.level[0].cat); | |
608 | ebitmap_destroy(&usrdatum->range.level[1].cat); | |
609 | ebitmap_destroy(&usrdatum->dfltlevel.cat); | |
610 | kfree(datum); | |
611 | return 0; | |
612 | } | |
613 | ||
614 | static int sens_destroy(void *key, void *datum, void *p) | |
615 | { | |
616 | struct level_datum *levdatum; | |
617 | ||
618 | kfree(key); | |
619 | levdatum = datum; | |
620 | ebitmap_destroy(&levdatum->level->cat); | |
621 | kfree(levdatum->level); | |
622 | kfree(datum); | |
623 | return 0; | |
624 | } | |
625 | ||
626 | static int cat_destroy(void *key, void *datum, void *p) | |
627 | { | |
628 | kfree(key); | |
629 | kfree(datum); | |
630 | return 0; | |
631 | } | |
632 | ||
633 | static int (*destroy_f[SYM_NUM]) (void *key, void *datum, void *datap) = | |
634 | { | |
635 | common_destroy, | |
6cbda6b6 | 636 | cls_destroy, |
1da177e4 LT |
637 | role_destroy, |
638 | type_destroy, | |
639 | user_destroy, | |
640 | cond_destroy_bool, | |
641 | sens_destroy, | |
642 | cat_destroy, | |
643 | }; | |
644 | ||
2f3e82d6 SS |
645 | static int range_tr_destroy(void *key, void *datum, void *p) |
646 | { | |
647 | struct mls_range *rt = datum; | |
648 | kfree(key); | |
649 | ebitmap_destroy(&rt->level[0].cat); | |
650 | ebitmap_destroy(&rt->level[1].cat); | |
651 | kfree(datum); | |
652 | cond_resched(); | |
653 | return 0; | |
654 | } | |
655 | ||
1da177e4 LT |
656 | static void ocontext_destroy(struct ocontext *c, int i) |
657 | { | |
658 | context_destroy(&c->context[0]); | |
659 | context_destroy(&c->context[1]); | |
660 | if (i == OCON_ISID || i == OCON_FS || | |
661 | i == OCON_NETIF || i == OCON_FSUSE) | |
662 | kfree(c->u.name); | |
663 | kfree(c); | |
664 | } | |
665 | ||
666 | /* | |
667 | * Free any memory allocated by a policy database structure. | |
668 | */ | |
669 | void policydb_destroy(struct policydb *p) | |
670 | { | |
671 | struct ocontext *c, *ctmp; | |
672 | struct genfs *g, *gtmp; | |
673 | int i; | |
782ebb99 SS |
674 | struct role_allow *ra, *lra = NULL; |
675 | struct role_trans *tr, *ltr = NULL; | |
1da177e4 LT |
676 | |
677 | for (i = 0; i < SYM_NUM; i++) { | |
9dc99780 | 678 | cond_resched(); |
1da177e4 LT |
679 | hashtab_map(p->symtab[i].table, destroy_f[i], NULL); |
680 | hashtab_destroy(p->symtab[i].table); | |
681 | } | |
682 | ||
9a5f04bf JJ |
683 | for (i = 0; i < SYM_NUM; i++) |
684 | kfree(p->sym_val_to_name[i]); | |
1da177e4 | 685 | |
9a5f04bf JJ |
686 | kfree(p->class_val_to_struct); |
687 | kfree(p->role_val_to_struct); | |
688 | kfree(p->user_val_to_struct); | |
d9250dea | 689 | kfree(p->type_val_to_struct); |
1da177e4 LT |
690 | |
691 | avtab_destroy(&p->te_avtab); | |
692 | ||
693 | for (i = 0; i < OCON_NUM; i++) { | |
9dc99780 | 694 | cond_resched(); |
1da177e4 LT |
695 | c = p->ocontexts[i]; |
696 | while (c) { | |
697 | ctmp = c; | |
698 | c = c->next; | |
2ced3dfd | 699 | ocontext_destroy(ctmp, i); |
1da177e4 | 700 | } |
6e8c751e | 701 | p->ocontexts[i] = NULL; |
1da177e4 LT |
702 | } |
703 | ||
704 | g = p->genfs; | |
705 | while (g) { | |
9dc99780 | 706 | cond_resched(); |
1da177e4 LT |
707 | kfree(g->fstype); |
708 | c = g->head; | |
709 | while (c) { | |
710 | ctmp = c; | |
711 | c = c->next; | |
2ced3dfd | 712 | ocontext_destroy(ctmp, OCON_FSUSE); |
1da177e4 LT |
713 | } |
714 | gtmp = g; | |
715 | g = g->next; | |
716 | kfree(gtmp); | |
717 | } | |
6e8c751e | 718 | p->genfs = NULL; |
1da177e4 LT |
719 | |
720 | cond_policydb_destroy(p); | |
721 | ||
782ebb99 | 722 | for (tr = p->role_tr; tr; tr = tr->next) { |
9dc99780 | 723 | cond_resched(); |
a7f988ba | 724 | kfree(ltr); |
782ebb99 SS |
725 | ltr = tr; |
726 | } | |
a7f988ba | 727 | kfree(ltr); |
782ebb99 | 728 | |
2ced3dfd | 729 | for (ra = p->role_allow; ra; ra = ra->next) { |
9dc99780 | 730 | cond_resched(); |
a7f988ba | 731 | kfree(lra); |
782ebb99 SS |
732 | lra = ra; |
733 | } | |
a7f988ba | 734 | kfree(lra); |
782ebb99 | 735 | |
2f3e82d6 SS |
736 | hashtab_map(p->range_tr, range_tr_destroy, NULL); |
737 | hashtab_destroy(p->range_tr); | |
782ebb99 | 738 | |
282c1f5e SS |
739 | if (p->type_attr_map) { |
740 | for (i = 0; i < p->p_types.nprim; i++) | |
741 | ebitmap_destroy(&p->type_attr_map[i]); | |
742 | } | |
782ebb99 | 743 | kfree(p->type_attr_map); |
3bb56b25 | 744 | ebitmap_destroy(&p->policycaps); |
64dbf074 | 745 | ebitmap_destroy(&p->permissive_map); |
3f12070e | 746 | |
1da177e4 LT |
747 | return; |
748 | } | |
749 | ||
750 | /* | |
751 | * Load the initial SIDs specified in a policy database | |
752 | * structure into a SID table. | |
753 | */ | |
754 | int policydb_load_isids(struct policydb *p, struct sidtab *s) | |
755 | { | |
756 | struct ocontext *head, *c; | |
757 | int rc; | |
758 | ||
759 | rc = sidtab_init(s); | |
760 | if (rc) { | |
454d972c | 761 | printk(KERN_ERR "SELinux: out of memory on SID table init\n"); |
1da177e4 LT |
762 | goto out; |
763 | } | |
764 | ||
765 | head = p->ocontexts[OCON_ISID]; | |
766 | for (c = head; c; c = c->next) { | |
767 | if (!c->context[0].user) { | |
454d972c | 768 | printk(KERN_ERR "SELinux: SID %s was never " |
1da177e4 LT |
769 | "defined.\n", c->u.name); |
770 | rc = -EINVAL; | |
771 | goto out; | |
772 | } | |
773 | if (sidtab_insert(s, c->sid[0], &c->context[0])) { | |
454d972c | 774 | printk(KERN_ERR "SELinux: unable to load initial " |
1da177e4 LT |
775 | "SID %s.\n", c->u.name); |
776 | rc = -EINVAL; | |
777 | goto out; | |
778 | } | |
779 | } | |
780 | out: | |
781 | return rc; | |
782 | } | |
783 | ||
45e5421e SS |
784 | int policydb_class_isvalid(struct policydb *p, unsigned int class) |
785 | { | |
786 | if (!class || class > p->p_classes.nprim) | |
787 | return 0; | |
788 | return 1; | |
789 | } | |
790 | ||
791 | int policydb_role_isvalid(struct policydb *p, unsigned int role) | |
792 | { | |
793 | if (!role || role > p->p_roles.nprim) | |
794 | return 0; | |
795 | return 1; | |
796 | } | |
797 | ||
798 | int policydb_type_isvalid(struct policydb *p, unsigned int type) | |
799 | { | |
800 | if (!type || type > p->p_types.nprim) | |
801 | return 0; | |
802 | return 1; | |
803 | } | |
804 | ||
1da177e4 LT |
805 | /* |
806 | * Return 1 if the fields in the security context | |
807 | * structure `c' are valid. Return 0 otherwise. | |
808 | */ | |
809 | int policydb_context_isvalid(struct policydb *p, struct context *c) | |
810 | { | |
811 | struct role_datum *role; | |
812 | struct user_datum *usrdatum; | |
813 | ||
814 | if (!c->role || c->role > p->p_roles.nprim) | |
815 | return 0; | |
816 | ||
817 | if (!c->user || c->user > p->p_users.nprim) | |
818 | return 0; | |
819 | ||
820 | if (!c->type || c->type > p->p_types.nprim) | |
821 | return 0; | |
822 | ||
823 | if (c->role != OBJECT_R_VAL) { | |
824 | /* | |
825 | * Role must be authorized for the type. | |
826 | */ | |
827 | role = p->role_val_to_struct[c->role - 1]; | |
828 | if (!ebitmap_get_bit(&role->types, | |
829 | c->type - 1)) | |
830 | /* role may not be associated with type */ | |
831 | return 0; | |
832 | ||
833 | /* | |
834 | * User must be authorized for the role. | |
835 | */ | |
836 | usrdatum = p->user_val_to_struct[c->user - 1]; | |
837 | if (!usrdatum) | |
838 | return 0; | |
839 | ||
840 | if (!ebitmap_get_bit(&usrdatum->roles, | |
841 | c->role - 1)) | |
842 | /* user may not be associated with role */ | |
843 | return 0; | |
844 | } | |
845 | ||
846 | if (!mls_context_isvalid(p, c)) | |
847 | return 0; | |
848 | ||
849 | return 1; | |
850 | } | |
851 | ||
852 | /* | |
853 | * Read a MLS range structure from a policydb binary | |
854 | * representation file. | |
855 | */ | |
856 | static int mls_read_range_helper(struct mls_range *r, void *fp) | |
857 | { | |
b5bf6c55 AD |
858 | __le32 buf[2]; |
859 | u32 items; | |
1da177e4 LT |
860 | int rc; |
861 | ||
862 | rc = next_entry(buf, fp, sizeof(u32)); | |
863 | if (rc < 0) | |
864 | goto out; | |
865 | ||
866 | items = le32_to_cpu(buf[0]); | |
867 | if (items > ARRAY_SIZE(buf)) { | |
454d972c | 868 | printk(KERN_ERR "SELinux: mls: range overflow\n"); |
1da177e4 LT |
869 | rc = -EINVAL; |
870 | goto out; | |
871 | } | |
872 | rc = next_entry(buf, fp, sizeof(u32) * items); | |
873 | if (rc < 0) { | |
454d972c | 874 | printk(KERN_ERR "SELinux: mls: truncated range\n"); |
1da177e4 LT |
875 | goto out; |
876 | } | |
877 | r->level[0].sens = le32_to_cpu(buf[0]); | |
878 | if (items > 1) | |
879 | r->level[1].sens = le32_to_cpu(buf[1]); | |
880 | else | |
881 | r->level[1].sens = r->level[0].sens; | |
882 | ||
883 | rc = ebitmap_read(&r->level[0].cat, fp); | |
884 | if (rc) { | |
454d972c | 885 | printk(KERN_ERR "SELinux: mls: error reading low " |
1da177e4 LT |
886 | "categories\n"); |
887 | goto out; | |
888 | } | |
889 | if (items > 1) { | |
890 | rc = ebitmap_read(&r->level[1].cat, fp); | |
891 | if (rc) { | |
454d972c | 892 | printk(KERN_ERR "SELinux: mls: error reading high " |
1da177e4 LT |
893 | "categories\n"); |
894 | goto bad_high; | |
895 | } | |
896 | } else { | |
897 | rc = ebitmap_cpy(&r->level[1].cat, &r->level[0].cat); | |
898 | if (rc) { | |
454d972c | 899 | printk(KERN_ERR "SELinux: mls: out of memory\n"); |
1da177e4 LT |
900 | goto bad_high; |
901 | } | |
902 | } | |
903 | ||
904 | rc = 0; | |
905 | out: | |
906 | return rc; | |
907 | bad_high: | |
908 | ebitmap_destroy(&r->level[0].cat); | |
909 | goto out; | |
910 | } | |
911 | ||
912 | /* | |
913 | * Read and validate a security context structure | |
914 | * from a policydb binary representation file. | |
915 | */ | |
916 | static int context_read_and_validate(struct context *c, | |
917 | struct policydb *p, | |
918 | void *fp) | |
919 | { | |
b5bf6c55 | 920 | __le32 buf[3]; |
1da177e4 LT |
921 | int rc; |
922 | ||
923 | rc = next_entry(buf, fp, sizeof buf); | |
924 | if (rc < 0) { | |
454d972c | 925 | printk(KERN_ERR "SELinux: context truncated\n"); |
1da177e4 LT |
926 | goto out; |
927 | } | |
928 | c->user = le32_to_cpu(buf[0]); | |
929 | c->role = le32_to_cpu(buf[1]); | |
930 | c->type = le32_to_cpu(buf[2]); | |
931 | if (p->policyvers >= POLICYDB_VERSION_MLS) { | |
932 | if (mls_read_range_helper(&c->range, fp)) { | |
454d972c | 933 | printk(KERN_ERR "SELinux: error reading MLS range of " |
1da177e4 LT |
934 | "context\n"); |
935 | rc = -EINVAL; | |
936 | goto out; | |
937 | } | |
938 | } | |
939 | ||
940 | if (!policydb_context_isvalid(p, c)) { | |
454d972c | 941 | printk(KERN_ERR "SELinux: invalid security context\n"); |
1da177e4 LT |
942 | context_destroy(c); |
943 | rc = -EINVAL; | |
944 | } | |
945 | out: | |
946 | return rc; | |
947 | } | |
948 | ||
949 | /* | |
950 | * The following *_read functions are used to | |
951 | * read the symbol data from a policy database | |
952 | * binary representation file. | |
953 | */ | |
954 | ||
955 | static int perm_read(struct policydb *p, struct hashtab *h, void *fp) | |
956 | { | |
957 | char *key = NULL; | |
958 | struct perm_datum *perdatum; | |
959 | int rc; | |
b5bf6c55 AD |
960 | __le32 buf[2]; |
961 | u32 len; | |
1da177e4 | 962 | |
89d155ef | 963 | perdatum = kzalloc(sizeof(*perdatum), GFP_KERNEL); |
1da177e4 LT |
964 | if (!perdatum) { |
965 | rc = -ENOMEM; | |
966 | goto out; | |
967 | } | |
1da177e4 LT |
968 | |
969 | rc = next_entry(buf, fp, sizeof buf); | |
970 | if (rc < 0) | |
971 | goto bad; | |
972 | ||
973 | len = le32_to_cpu(buf[0]); | |
974 | perdatum->value = le32_to_cpu(buf[1]); | |
975 | ||
2ced3dfd | 976 | key = kmalloc(len + 1, GFP_KERNEL); |
1da177e4 LT |
977 | if (!key) { |
978 | rc = -ENOMEM; | |
979 | goto bad; | |
980 | } | |
981 | rc = next_entry(key, fp, len); | |
982 | if (rc < 0) | |
983 | goto bad; | |
df4ea865 | 984 | key[len] = '\0'; |
1da177e4 LT |
985 | |
986 | rc = hashtab_insert(h, key, perdatum); | |
987 | if (rc) | |
988 | goto bad; | |
989 | out: | |
990 | return rc; | |
991 | bad: | |
992 | perm_destroy(key, perdatum, NULL); | |
993 | goto out; | |
994 | } | |
995 | ||
996 | static int common_read(struct policydb *p, struct hashtab *h, void *fp) | |
997 | { | |
998 | char *key = NULL; | |
999 | struct common_datum *comdatum; | |
b5bf6c55 AD |
1000 | __le32 buf[4]; |
1001 | u32 len, nel; | |
1da177e4 LT |
1002 | int i, rc; |
1003 | ||
89d155ef | 1004 | comdatum = kzalloc(sizeof(*comdatum), GFP_KERNEL); |
1da177e4 LT |
1005 | if (!comdatum) { |
1006 | rc = -ENOMEM; | |
1007 | goto out; | |
1008 | } | |
1da177e4 LT |
1009 | |
1010 | rc = next_entry(buf, fp, sizeof buf); | |
1011 | if (rc < 0) | |
1012 | goto bad; | |
1013 | ||
1014 | len = le32_to_cpu(buf[0]); | |
1015 | comdatum->value = le32_to_cpu(buf[1]); | |
1016 | ||
1017 | rc = symtab_init(&comdatum->permissions, PERM_SYMTAB_SIZE); | |
1018 | if (rc) | |
1019 | goto bad; | |
1020 | comdatum->permissions.nprim = le32_to_cpu(buf[2]); | |
1021 | nel = le32_to_cpu(buf[3]); | |
1022 | ||
2ced3dfd | 1023 | key = kmalloc(len + 1, GFP_KERNEL); |
1da177e4 LT |
1024 | if (!key) { |
1025 | rc = -ENOMEM; | |
1026 | goto bad; | |
1027 | } | |
1028 | rc = next_entry(key, fp, len); | |
1029 | if (rc < 0) | |
1030 | goto bad; | |
df4ea865 | 1031 | key[len] = '\0'; |
1da177e4 LT |
1032 | |
1033 | for (i = 0; i < nel; i++) { | |
1034 | rc = perm_read(p, comdatum->permissions.table, fp); | |
1035 | if (rc) | |
1036 | goto bad; | |
1037 | } | |
1038 | ||
1039 | rc = hashtab_insert(h, key, comdatum); | |
1040 | if (rc) | |
1041 | goto bad; | |
1042 | out: | |
1043 | return rc; | |
1044 | bad: | |
1045 | common_destroy(key, comdatum, NULL); | |
1046 | goto out; | |
1047 | } | |
1048 | ||
1049 | static int read_cons_helper(struct constraint_node **nodep, int ncons, | |
2ced3dfd | 1050 | int allowxtarget, void *fp) |
1da177e4 LT |
1051 | { |
1052 | struct constraint_node *c, *lc; | |
1053 | struct constraint_expr *e, *le; | |
b5bf6c55 AD |
1054 | __le32 buf[3]; |
1055 | u32 nexpr; | |
1da177e4 LT |
1056 | int rc, i, j, depth; |
1057 | ||
1058 | lc = NULL; | |
1059 | for (i = 0; i < ncons; i++) { | |
89d155ef | 1060 | c = kzalloc(sizeof(*c), GFP_KERNEL); |
1da177e4 LT |
1061 | if (!c) |
1062 | return -ENOMEM; | |
1da177e4 | 1063 | |
2ced3dfd | 1064 | if (lc) |
1da177e4 | 1065 | lc->next = c; |
2ced3dfd | 1066 | else |
1da177e4 | 1067 | *nodep = c; |
1da177e4 LT |
1068 | |
1069 | rc = next_entry(buf, fp, (sizeof(u32) * 2)); | |
1070 | if (rc < 0) | |
1071 | return rc; | |
1072 | c->permissions = le32_to_cpu(buf[0]); | |
1073 | nexpr = le32_to_cpu(buf[1]); | |
1074 | le = NULL; | |
1075 | depth = -1; | |
1076 | for (j = 0; j < nexpr; j++) { | |
89d155ef | 1077 | e = kzalloc(sizeof(*e), GFP_KERNEL); |
1da177e4 LT |
1078 | if (!e) |
1079 | return -ENOMEM; | |
1da177e4 | 1080 | |
2ced3dfd | 1081 | if (le) |
1da177e4 | 1082 | le->next = e; |
2ced3dfd | 1083 | else |
1da177e4 | 1084 | c->expr = e; |
1da177e4 LT |
1085 | |
1086 | rc = next_entry(buf, fp, (sizeof(u32) * 3)); | |
1087 | if (rc < 0) | |
1088 | return rc; | |
1089 | e->expr_type = le32_to_cpu(buf[0]); | |
1090 | e->attr = le32_to_cpu(buf[1]); | |
1091 | e->op = le32_to_cpu(buf[2]); | |
1092 | ||
1093 | switch (e->expr_type) { | |
1094 | case CEXPR_NOT: | |
1095 | if (depth < 0) | |
1096 | return -EINVAL; | |
1097 | break; | |
1098 | case CEXPR_AND: | |
1099 | case CEXPR_OR: | |
1100 | if (depth < 1) | |
1101 | return -EINVAL; | |
1102 | depth--; | |
1103 | break; | |
1104 | case CEXPR_ATTR: | |
1105 | if (depth == (CEXPR_MAXDEPTH - 1)) | |
1106 | return -EINVAL; | |
1107 | depth++; | |
1108 | break; | |
1109 | case CEXPR_NAMES: | |
1110 | if (!allowxtarget && (e->attr & CEXPR_XTARGET)) | |
1111 | return -EINVAL; | |
1112 | if (depth == (CEXPR_MAXDEPTH - 1)) | |
1113 | return -EINVAL; | |
1114 | depth++; | |
1115 | if (ebitmap_read(&e->names, fp)) | |
1116 | return -EINVAL; | |
1117 | break; | |
1118 | default: | |
1119 | return -EINVAL; | |
1120 | } | |
1121 | le = e; | |
1122 | } | |
1123 | if (depth != 0) | |
1124 | return -EINVAL; | |
1125 | lc = c; | |
1126 | } | |
1127 | ||
1128 | return 0; | |
1129 | } | |
1130 | ||
1131 | static int class_read(struct policydb *p, struct hashtab *h, void *fp) | |
1132 | { | |
1133 | char *key = NULL; | |
1134 | struct class_datum *cladatum; | |
b5bf6c55 AD |
1135 | __le32 buf[6]; |
1136 | u32 len, len2, ncons, nel; | |
1da177e4 LT |
1137 | int i, rc; |
1138 | ||
89d155ef | 1139 | cladatum = kzalloc(sizeof(*cladatum), GFP_KERNEL); |
1da177e4 LT |
1140 | if (!cladatum) { |
1141 | rc = -ENOMEM; | |
1142 | goto out; | |
1143 | } | |
1da177e4 LT |
1144 | |
1145 | rc = next_entry(buf, fp, sizeof(u32)*6); | |
1146 | if (rc < 0) | |
1147 | goto bad; | |
1148 | ||
1149 | len = le32_to_cpu(buf[0]); | |
1150 | len2 = le32_to_cpu(buf[1]); | |
1151 | cladatum->value = le32_to_cpu(buf[2]); | |
1152 | ||
1153 | rc = symtab_init(&cladatum->permissions, PERM_SYMTAB_SIZE); | |
1154 | if (rc) | |
1155 | goto bad; | |
1156 | cladatum->permissions.nprim = le32_to_cpu(buf[3]); | |
1157 | nel = le32_to_cpu(buf[4]); | |
1158 | ||
1159 | ncons = le32_to_cpu(buf[5]); | |
1160 | ||
2ced3dfd | 1161 | key = kmalloc(len + 1, GFP_KERNEL); |
1da177e4 LT |
1162 | if (!key) { |
1163 | rc = -ENOMEM; | |
1164 | goto bad; | |
1165 | } | |
1166 | rc = next_entry(key, fp, len); | |
1167 | if (rc < 0) | |
1168 | goto bad; | |
df4ea865 | 1169 | key[len] = '\0'; |
1da177e4 LT |
1170 | |
1171 | if (len2) { | |
2ced3dfd | 1172 | cladatum->comkey = kmalloc(len2 + 1, GFP_KERNEL); |
1da177e4 LT |
1173 | if (!cladatum->comkey) { |
1174 | rc = -ENOMEM; | |
1175 | goto bad; | |
1176 | } | |
1177 | rc = next_entry(cladatum->comkey, fp, len2); | |
1178 | if (rc < 0) | |
1179 | goto bad; | |
df4ea865 | 1180 | cladatum->comkey[len2] = '\0'; |
1da177e4 LT |
1181 | |
1182 | cladatum->comdatum = hashtab_search(p->p_commons.table, | |
1183 | cladatum->comkey); | |
1184 | if (!cladatum->comdatum) { | |
454d972c | 1185 | printk(KERN_ERR "SELinux: unknown common %s\n", |
1da177e4 LT |
1186 | cladatum->comkey); |
1187 | rc = -EINVAL; | |
1188 | goto bad; | |
1189 | } | |
1190 | } | |
1191 | for (i = 0; i < nel; i++) { | |
1192 | rc = perm_read(p, cladatum->permissions.table, fp); | |
1193 | if (rc) | |
1194 | goto bad; | |
1195 | } | |
1196 | ||
1197 | rc = read_cons_helper(&cladatum->constraints, ncons, 0, fp); | |
1198 | if (rc) | |
1199 | goto bad; | |
1200 | ||
1201 | if (p->policyvers >= POLICYDB_VERSION_VALIDATETRANS) { | |
1202 | /* grab the validatetrans rules */ | |
1203 | rc = next_entry(buf, fp, sizeof(u32)); | |
1204 | if (rc < 0) | |
1205 | goto bad; | |
1206 | ncons = le32_to_cpu(buf[0]); | |
1207 | rc = read_cons_helper(&cladatum->validatetrans, ncons, 1, fp); | |
1208 | if (rc) | |
1209 | goto bad; | |
1210 | } | |
1211 | ||
1212 | rc = hashtab_insert(h, key, cladatum); | |
1213 | if (rc) | |
1214 | goto bad; | |
1215 | ||
1216 | rc = 0; | |
1217 | out: | |
1218 | return rc; | |
1219 | bad: | |
6cbda6b6 | 1220 | cls_destroy(key, cladatum, NULL); |
1da177e4 LT |
1221 | goto out; |
1222 | } | |
1223 | ||
1224 | static int role_read(struct policydb *p, struct hashtab *h, void *fp) | |
1225 | { | |
1226 | char *key = NULL; | |
1227 | struct role_datum *role; | |
d9250dea KK |
1228 | int rc, to_read = 2; |
1229 | __le32 buf[3]; | |
b5bf6c55 | 1230 | u32 len; |
1da177e4 | 1231 | |
89d155ef | 1232 | role = kzalloc(sizeof(*role), GFP_KERNEL); |
1da177e4 LT |
1233 | if (!role) { |
1234 | rc = -ENOMEM; | |
1235 | goto out; | |
1236 | } | |
1da177e4 | 1237 | |
d9250dea KK |
1238 | if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) |
1239 | to_read = 3; | |
1240 | ||
1241 | rc = next_entry(buf, fp, sizeof(buf[0]) * to_read); | |
1da177e4 LT |
1242 | if (rc < 0) |
1243 | goto bad; | |
1244 | ||
1245 | len = le32_to_cpu(buf[0]); | |
1246 | role->value = le32_to_cpu(buf[1]); | |
d9250dea KK |
1247 | if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) |
1248 | role->bounds = le32_to_cpu(buf[2]); | |
1da177e4 | 1249 | |
2ced3dfd | 1250 | key = kmalloc(len + 1, GFP_KERNEL); |
1da177e4 LT |
1251 | if (!key) { |
1252 | rc = -ENOMEM; | |
1253 | goto bad; | |
1254 | } | |
1255 | rc = next_entry(key, fp, len); | |
1256 | if (rc < 0) | |
1257 | goto bad; | |
df4ea865 | 1258 | key[len] = '\0'; |
1da177e4 LT |
1259 | |
1260 | rc = ebitmap_read(&role->dominates, fp); | |
1261 | if (rc) | |
1262 | goto bad; | |
1263 | ||
1264 | rc = ebitmap_read(&role->types, fp); | |
1265 | if (rc) | |
1266 | goto bad; | |
1267 | ||
1268 | if (strcmp(key, OBJECT_R) == 0) { | |
1269 | if (role->value != OBJECT_R_VAL) { | |
744ba35e | 1270 | printk(KERN_ERR "SELinux: Role %s has wrong value %d\n", |
1da177e4 LT |
1271 | OBJECT_R, role->value); |
1272 | rc = -EINVAL; | |
1273 | goto bad; | |
1274 | } | |
1275 | rc = 0; | |
1276 | goto bad; | |
1277 | } | |
1278 | ||
1279 | rc = hashtab_insert(h, key, role); | |
1280 | if (rc) | |
1281 | goto bad; | |
1282 | out: | |
1283 | return rc; | |
1284 | bad: | |
1285 | role_destroy(key, role, NULL); | |
1286 | goto out; | |
1287 | } | |
1288 | ||
1289 | static int type_read(struct policydb *p, struct hashtab *h, void *fp) | |
1290 | { | |
1291 | char *key = NULL; | |
1292 | struct type_datum *typdatum; | |
d9250dea KK |
1293 | int rc, to_read = 3; |
1294 | __le32 buf[4]; | |
b5bf6c55 | 1295 | u32 len; |
1da177e4 | 1296 | |
2ced3dfd | 1297 | typdatum = kzalloc(sizeof(*typdatum), GFP_KERNEL); |
1da177e4 LT |
1298 | if (!typdatum) { |
1299 | rc = -ENOMEM; | |
1300 | return rc; | |
1301 | } | |
1da177e4 | 1302 | |
d9250dea KK |
1303 | if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) |
1304 | to_read = 4; | |
1305 | ||
1306 | rc = next_entry(buf, fp, sizeof(buf[0]) * to_read); | |
1da177e4 LT |
1307 | if (rc < 0) |
1308 | goto bad; | |
1309 | ||
1310 | len = le32_to_cpu(buf[0]); | |
1311 | typdatum->value = le32_to_cpu(buf[1]); | |
d9250dea KK |
1312 | if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) { |
1313 | u32 prop = le32_to_cpu(buf[2]); | |
1314 | ||
1315 | if (prop & TYPEDATUM_PROPERTY_PRIMARY) | |
1316 | typdatum->primary = 1; | |
1317 | if (prop & TYPEDATUM_PROPERTY_ATTRIBUTE) | |
1318 | typdatum->attribute = 1; | |
1319 | ||
1320 | typdatum->bounds = le32_to_cpu(buf[3]); | |
1321 | } else { | |
1322 | typdatum->primary = le32_to_cpu(buf[2]); | |
1323 | } | |
1da177e4 | 1324 | |
2ced3dfd | 1325 | key = kmalloc(len + 1, GFP_KERNEL); |
1da177e4 LT |
1326 | if (!key) { |
1327 | rc = -ENOMEM; | |
1328 | goto bad; | |
1329 | } | |
1330 | rc = next_entry(key, fp, len); | |
1331 | if (rc < 0) | |
1332 | goto bad; | |
df4ea865 | 1333 | key[len] = '\0'; |
1da177e4 LT |
1334 | |
1335 | rc = hashtab_insert(h, key, typdatum); | |
1336 | if (rc) | |
1337 | goto bad; | |
1338 | out: | |
1339 | return rc; | |
1340 | bad: | |
1341 | type_destroy(key, typdatum, NULL); | |
1342 | goto out; | |
1343 | } | |
1344 | ||
1345 | ||
1346 | /* | |
1347 | * Read a MLS level structure from a policydb binary | |
1348 | * representation file. | |
1349 | */ | |
1350 | static int mls_read_level(struct mls_level *lp, void *fp) | |
1351 | { | |
b5bf6c55 | 1352 | __le32 buf[1]; |
1da177e4 LT |
1353 | int rc; |
1354 | ||
1355 | memset(lp, 0, sizeof(*lp)); | |
1356 | ||
1357 | rc = next_entry(buf, fp, sizeof buf); | |
1358 | if (rc < 0) { | |
454d972c | 1359 | printk(KERN_ERR "SELinux: mls: truncated level\n"); |
1da177e4 LT |
1360 | goto bad; |
1361 | } | |
1362 | lp->sens = le32_to_cpu(buf[0]); | |
1363 | ||
1364 | if (ebitmap_read(&lp->cat, fp)) { | |
454d972c | 1365 | printk(KERN_ERR "SELinux: mls: error reading level " |
1da177e4 LT |
1366 | "categories\n"); |
1367 | goto bad; | |
1368 | } | |
45e5421e | 1369 | |
1da177e4 LT |
1370 | return 0; |
1371 | ||
1372 | bad: | |
1373 | return -EINVAL; | |
1374 | } | |
1375 | ||
1376 | static int user_read(struct policydb *p, struct hashtab *h, void *fp) | |
1377 | { | |
1378 | char *key = NULL; | |
1379 | struct user_datum *usrdatum; | |
d9250dea KK |
1380 | int rc, to_read = 2; |
1381 | __le32 buf[3]; | |
b5bf6c55 | 1382 | u32 len; |
1da177e4 | 1383 | |
89d155ef | 1384 | usrdatum = kzalloc(sizeof(*usrdatum), GFP_KERNEL); |
1da177e4 LT |
1385 | if (!usrdatum) { |
1386 | rc = -ENOMEM; | |
1387 | goto out; | |
1388 | } | |
1da177e4 | 1389 | |
d9250dea KK |
1390 | if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) |
1391 | to_read = 3; | |
1392 | ||
1393 | rc = next_entry(buf, fp, sizeof(buf[0]) * to_read); | |
1da177e4 LT |
1394 | if (rc < 0) |
1395 | goto bad; | |
1396 | ||
1397 | len = le32_to_cpu(buf[0]); | |
1398 | usrdatum->value = le32_to_cpu(buf[1]); | |
d9250dea KK |
1399 | if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) |
1400 | usrdatum->bounds = le32_to_cpu(buf[2]); | |
1da177e4 | 1401 | |
2ced3dfd | 1402 | key = kmalloc(len + 1, GFP_KERNEL); |
1da177e4 LT |
1403 | if (!key) { |
1404 | rc = -ENOMEM; | |
1405 | goto bad; | |
1406 | } | |
1407 | rc = next_entry(key, fp, len); | |
1408 | if (rc < 0) | |
1409 | goto bad; | |
df4ea865 | 1410 | key[len] = '\0'; |
1da177e4 LT |
1411 | |
1412 | rc = ebitmap_read(&usrdatum->roles, fp); | |
1413 | if (rc) | |
1414 | goto bad; | |
1415 | ||
1416 | if (p->policyvers >= POLICYDB_VERSION_MLS) { | |
1417 | rc = mls_read_range_helper(&usrdatum->range, fp); | |
1418 | if (rc) | |
1419 | goto bad; | |
1420 | rc = mls_read_level(&usrdatum->dfltlevel, fp); | |
1421 | if (rc) | |
1422 | goto bad; | |
1423 | } | |
1424 | ||
1425 | rc = hashtab_insert(h, key, usrdatum); | |
1426 | if (rc) | |
1427 | goto bad; | |
1428 | out: | |
1429 | return rc; | |
1430 | bad: | |
1431 | user_destroy(key, usrdatum, NULL); | |
1432 | goto out; | |
1433 | } | |
1434 | ||
1435 | static int sens_read(struct policydb *p, struct hashtab *h, void *fp) | |
1436 | { | |
1437 | char *key = NULL; | |
1438 | struct level_datum *levdatum; | |
1439 | int rc; | |
b5bf6c55 AD |
1440 | __le32 buf[2]; |
1441 | u32 len; | |
1da177e4 | 1442 | |
89d155ef | 1443 | levdatum = kzalloc(sizeof(*levdatum), GFP_ATOMIC); |
1da177e4 LT |
1444 | if (!levdatum) { |
1445 | rc = -ENOMEM; | |
1446 | goto out; | |
1447 | } | |
1da177e4 LT |
1448 | |
1449 | rc = next_entry(buf, fp, sizeof buf); | |
1450 | if (rc < 0) | |
1451 | goto bad; | |
1452 | ||
1453 | len = le32_to_cpu(buf[0]); | |
1454 | levdatum->isalias = le32_to_cpu(buf[1]); | |
1455 | ||
2ced3dfd | 1456 | key = kmalloc(len + 1, GFP_ATOMIC); |
1da177e4 LT |
1457 | if (!key) { |
1458 | rc = -ENOMEM; | |
1459 | goto bad; | |
1460 | } | |
1461 | rc = next_entry(key, fp, len); | |
1462 | if (rc < 0) | |
1463 | goto bad; | |
df4ea865 | 1464 | key[len] = '\0'; |
1da177e4 LT |
1465 | |
1466 | levdatum->level = kmalloc(sizeof(struct mls_level), GFP_ATOMIC); | |
1467 | if (!levdatum->level) { | |
1468 | rc = -ENOMEM; | |
1469 | goto bad; | |
1470 | } | |
1471 | if (mls_read_level(levdatum->level, fp)) { | |
1472 | rc = -EINVAL; | |
1473 | goto bad; | |
1474 | } | |
1475 | ||
1476 | rc = hashtab_insert(h, key, levdatum); | |
1477 | if (rc) | |
1478 | goto bad; | |
1479 | out: | |
1480 | return rc; | |
1481 | bad: | |
1482 | sens_destroy(key, levdatum, NULL); | |
1483 | goto out; | |
1484 | } | |
1485 | ||
1486 | static int cat_read(struct policydb *p, struct hashtab *h, void *fp) | |
1487 | { | |
1488 | char *key = NULL; | |
1489 | struct cat_datum *catdatum; | |
1490 | int rc; | |
b5bf6c55 AD |
1491 | __le32 buf[3]; |
1492 | u32 len; | |
1da177e4 | 1493 | |
89d155ef | 1494 | catdatum = kzalloc(sizeof(*catdatum), GFP_ATOMIC); |
1da177e4 LT |
1495 | if (!catdatum) { |
1496 | rc = -ENOMEM; | |
1497 | goto out; | |
1498 | } | |
1da177e4 LT |
1499 | |
1500 | rc = next_entry(buf, fp, sizeof buf); | |
1501 | if (rc < 0) | |
1502 | goto bad; | |
1503 | ||
1504 | len = le32_to_cpu(buf[0]); | |
1505 | catdatum->value = le32_to_cpu(buf[1]); | |
1506 | catdatum->isalias = le32_to_cpu(buf[2]); | |
1507 | ||
2ced3dfd | 1508 | key = kmalloc(len + 1, GFP_ATOMIC); |
1da177e4 LT |
1509 | if (!key) { |
1510 | rc = -ENOMEM; | |
1511 | goto bad; | |
1512 | } | |
1513 | rc = next_entry(key, fp, len); | |
1514 | if (rc < 0) | |
1515 | goto bad; | |
df4ea865 | 1516 | key[len] = '\0'; |
1da177e4 LT |
1517 | |
1518 | rc = hashtab_insert(h, key, catdatum); | |
1519 | if (rc) | |
1520 | goto bad; | |
1521 | out: | |
1522 | return rc; | |
1523 | ||
1524 | bad: | |
1525 | cat_destroy(key, catdatum, NULL); | |
1526 | goto out; | |
1527 | } | |
1528 | ||
1529 | static int (*read_f[SYM_NUM]) (struct policydb *p, struct hashtab *h, void *fp) = | |
1530 | { | |
1531 | common_read, | |
1532 | class_read, | |
1533 | role_read, | |
1534 | type_read, | |
1535 | user_read, | |
1536 | cond_read_bool, | |
1537 | sens_read, | |
1538 | cat_read, | |
1539 | }; | |
1540 | ||
d9250dea KK |
1541 | static int user_bounds_sanity_check(void *key, void *datum, void *datap) |
1542 | { | |
1543 | struct user_datum *upper, *user; | |
1544 | struct policydb *p = datap; | |
1545 | int depth = 0; | |
1546 | ||
1547 | upper = user = datum; | |
1548 | while (upper->bounds) { | |
1549 | struct ebitmap_node *node; | |
1550 | unsigned long bit; | |
1551 | ||
1552 | if (++depth == POLICYDB_BOUNDS_MAXDEPTH) { | |
1553 | printk(KERN_ERR "SELinux: user %s: " | |
1554 | "too deep or looped boundary", | |
1555 | (char *) key); | |
1556 | return -EINVAL; | |
1557 | } | |
1558 | ||
1559 | upper = p->user_val_to_struct[upper->bounds - 1]; | |
1560 | ebitmap_for_each_positive_bit(&user->roles, node, bit) { | |
1561 | if (ebitmap_get_bit(&upper->roles, bit)) | |
1562 | continue; | |
1563 | ||
1564 | printk(KERN_ERR | |
1565 | "SELinux: boundary violated policy: " | |
1566 | "user=%s role=%s bounds=%s\n", | |
1567 | p->p_user_val_to_name[user->value - 1], | |
1568 | p->p_role_val_to_name[bit], | |
1569 | p->p_user_val_to_name[upper->value - 1]); | |
1570 | ||
1571 | return -EINVAL; | |
1572 | } | |
1573 | } | |
1574 | ||
1575 | return 0; | |
1576 | } | |
1577 | ||
1578 | static int role_bounds_sanity_check(void *key, void *datum, void *datap) | |
1579 | { | |
1580 | struct role_datum *upper, *role; | |
1581 | struct policydb *p = datap; | |
1582 | int depth = 0; | |
1583 | ||
1584 | upper = role = datum; | |
1585 | while (upper->bounds) { | |
1586 | struct ebitmap_node *node; | |
1587 | unsigned long bit; | |
1588 | ||
1589 | if (++depth == POLICYDB_BOUNDS_MAXDEPTH) { | |
1590 | printk(KERN_ERR "SELinux: role %s: " | |
1591 | "too deep or looped bounds\n", | |
1592 | (char *) key); | |
1593 | return -EINVAL; | |
1594 | } | |
1595 | ||
1596 | upper = p->role_val_to_struct[upper->bounds - 1]; | |
1597 | ebitmap_for_each_positive_bit(&role->types, node, bit) { | |
1598 | if (ebitmap_get_bit(&upper->types, bit)) | |
1599 | continue; | |
1600 | ||
1601 | printk(KERN_ERR | |
1602 | "SELinux: boundary violated policy: " | |
1603 | "role=%s type=%s bounds=%s\n", | |
1604 | p->p_role_val_to_name[role->value - 1], | |
1605 | p->p_type_val_to_name[bit], | |
1606 | p->p_role_val_to_name[upper->value - 1]); | |
1607 | ||
1608 | return -EINVAL; | |
1609 | } | |
1610 | } | |
1611 | ||
1612 | return 0; | |
1613 | } | |
1614 | ||
1615 | static int type_bounds_sanity_check(void *key, void *datum, void *datap) | |
1616 | { | |
1617 | struct type_datum *upper, *type; | |
1618 | struct policydb *p = datap; | |
1619 | int depth = 0; | |
1620 | ||
1621 | upper = type = datum; | |
1622 | while (upper->bounds) { | |
1623 | if (++depth == POLICYDB_BOUNDS_MAXDEPTH) { | |
1624 | printk(KERN_ERR "SELinux: type %s: " | |
1625 | "too deep or looped boundary\n", | |
1626 | (char *) key); | |
1627 | return -EINVAL; | |
1628 | } | |
1629 | ||
1630 | upper = p->type_val_to_struct[upper->bounds - 1]; | |
1631 | if (upper->attribute) { | |
1632 | printk(KERN_ERR "SELinux: type %s: " | |
1633 | "bounded by attribute %s", | |
1634 | (char *) key, | |
1635 | p->p_type_val_to_name[upper->value - 1]); | |
1636 | return -EINVAL; | |
1637 | } | |
1638 | } | |
1639 | ||
1640 | return 0; | |
1641 | } | |
1642 | ||
1643 | static int policydb_bounds_sanity_check(struct policydb *p) | |
1644 | { | |
1645 | int rc; | |
1646 | ||
1647 | if (p->policyvers < POLICYDB_VERSION_BOUNDARY) | |
1648 | return 0; | |
1649 | ||
1650 | rc = hashtab_map(p->p_users.table, | |
1651 | user_bounds_sanity_check, p); | |
1652 | if (rc) | |
1653 | return rc; | |
1654 | ||
1655 | rc = hashtab_map(p->p_roles.table, | |
1656 | role_bounds_sanity_check, p); | |
1657 | if (rc) | |
1658 | return rc; | |
1659 | ||
1660 | rc = hashtab_map(p->p_types.table, | |
1661 | type_bounds_sanity_check, p); | |
1662 | if (rc) | |
1663 | return rc; | |
1664 | ||
1665 | return 0; | |
1666 | } | |
1667 | ||
1da177e4 LT |
1668 | extern int ss_initialized; |
1669 | ||
c6d3aaa4 SS |
1670 | u16 string_to_security_class(struct policydb *p, const char *name) |
1671 | { | |
1672 | struct class_datum *cladatum; | |
1673 | ||
1674 | cladatum = hashtab_search(p->p_classes.table, name); | |
1675 | if (!cladatum) | |
1676 | return 0; | |
1677 | ||
1678 | return cladatum->value; | |
1679 | } | |
1680 | ||
1681 | u32 string_to_av_perm(struct policydb *p, u16 tclass, const char *name) | |
1682 | { | |
1683 | struct class_datum *cladatum; | |
1684 | struct perm_datum *perdatum = NULL; | |
1685 | struct common_datum *comdatum; | |
1686 | ||
1687 | if (!tclass || tclass > p->p_classes.nprim) | |
1688 | return 0; | |
1689 | ||
1690 | cladatum = p->class_val_to_struct[tclass-1]; | |
1691 | comdatum = cladatum->comdatum; | |
1692 | if (comdatum) | |
1693 | perdatum = hashtab_search(comdatum->permissions.table, | |
1694 | name); | |
1695 | if (!perdatum) | |
1696 | perdatum = hashtab_search(cladatum->permissions.table, | |
1697 | name); | |
1698 | if (!perdatum) | |
1699 | return 0; | |
1700 | ||
1701 | return 1U << (perdatum->value-1); | |
1702 | } | |
1703 | ||
9ee0c823 EP |
1704 | static int range_read(struct policydb *p, void *fp) |
1705 | { | |
1706 | struct range_trans *rt = NULL; | |
1707 | struct mls_range *r = NULL; | |
1708 | int i, rc; | |
1709 | __le32 buf[2]; | |
1710 | u32 nel; | |
1711 | ||
1712 | if (p->policyvers < POLICYDB_VERSION_MLS) | |
1713 | return 0; | |
1714 | ||
1715 | rc = next_entry(buf, fp, sizeof(u32)); | |
1716 | if (rc) | |
1717 | goto out; | |
1718 | ||
1719 | nel = le32_to_cpu(buf[0]); | |
1720 | for (i = 0; i < nel; i++) { | |
1721 | rc = -ENOMEM; | |
1722 | rt = kzalloc(sizeof(*rt), GFP_KERNEL); | |
1723 | if (!rt) | |
1724 | goto out; | |
1725 | ||
1726 | rc = next_entry(buf, fp, (sizeof(u32) * 2)); | |
1727 | if (rc) | |
1728 | goto out; | |
1729 | ||
1730 | rt->source_type = le32_to_cpu(buf[0]); | |
1731 | rt->target_type = le32_to_cpu(buf[1]); | |
1732 | if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) { | |
1733 | rc = next_entry(buf, fp, sizeof(u32)); | |
1734 | if (rc) | |
1735 | goto out; | |
1736 | rt->target_class = le32_to_cpu(buf[0]); | |
1737 | } else | |
1738 | rt->target_class = p->process_class; | |
1739 | ||
1740 | rc = -EINVAL; | |
1741 | if (!policydb_type_isvalid(p, rt->source_type) || | |
1742 | !policydb_type_isvalid(p, rt->target_type) || | |
1743 | !policydb_class_isvalid(p, rt->target_class)) | |
1744 | goto out; | |
1745 | ||
1746 | rc = -ENOMEM; | |
1747 | r = kzalloc(sizeof(*r), GFP_KERNEL); | |
1748 | if (!r) | |
1749 | goto out; | |
1750 | ||
1751 | rc = mls_read_range_helper(r, fp); | |
1752 | if (rc) | |
1753 | goto out; | |
1754 | ||
1755 | rc = -EINVAL; | |
1756 | if (!mls_range_isvalid(p, r)) { | |
1757 | printk(KERN_WARNING "SELinux: rangetrans: invalid range\n"); | |
1758 | goto out; | |
1759 | } | |
1760 | ||
1761 | rc = hashtab_insert(p->range_tr, rt, r); | |
1762 | if (rc) | |
1763 | goto out; | |
1764 | ||
1765 | rt = NULL; | |
1766 | r = NULL; | |
1767 | } | |
1768 | rangetr_hash_eval(p->range_tr); | |
1769 | rc = 0; | |
1770 | out: | |
1771 | kfree(rt); | |
1772 | kfree(r); | |
1773 | return rc; | |
1774 | } | |
1775 | ||
1da177e4 LT |
1776 | /* |
1777 | * Read the configuration data from a policy database binary | |
1778 | * representation file into a policy database structure. | |
1779 | */ | |
1780 | int policydb_read(struct policydb *p, void *fp) | |
1781 | { | |
1782 | struct role_allow *ra, *lra; | |
1783 | struct role_trans *tr, *ltr; | |
1784 | struct ocontext *l, *c, *newc; | |
1785 | struct genfs *genfs_p, *genfs, *newgenfs; | |
1786 | int i, j, rc; | |
59dbd1ba SS |
1787 | __le32 buf[4]; |
1788 | u32 nodebuf[8]; | |
0719aaf5 | 1789 | u32 len, len2, nprim, nel, nel2; |
1da177e4 LT |
1790 | char *policydb_str; |
1791 | struct policydb_compat_info *info; | |
1da177e4 | 1792 | |
1da177e4 LT |
1793 | rc = policydb_init(p); |
1794 | if (rc) | |
1795 | goto out; | |
1796 | ||
1797 | /* Read the magic number and string length. */ | |
2ced3dfd | 1798 | rc = next_entry(buf, fp, sizeof(u32) * 2); |
1da177e4 LT |
1799 | if (rc < 0) |
1800 | goto bad; | |
1801 | ||
b5bf6c55 | 1802 | if (le32_to_cpu(buf[0]) != POLICYDB_MAGIC) { |
454d972c | 1803 | printk(KERN_ERR "SELinux: policydb magic number 0x%x does " |
1da177e4 | 1804 | "not match expected magic number 0x%x\n", |
b5bf6c55 | 1805 | le32_to_cpu(buf[0]), POLICYDB_MAGIC); |
1da177e4 LT |
1806 | goto bad; |
1807 | } | |
1808 | ||
b5bf6c55 | 1809 | len = le32_to_cpu(buf[1]); |
1da177e4 | 1810 | if (len != strlen(POLICYDB_STRING)) { |
454d972c | 1811 | printk(KERN_ERR "SELinux: policydb string length %d does not " |
1da177e4 LT |
1812 | "match expected length %Zu\n", |
1813 | len, strlen(POLICYDB_STRING)); | |
1814 | goto bad; | |
1815 | } | |
2ced3dfd | 1816 | policydb_str = kmalloc(len + 1, GFP_KERNEL); |
1da177e4 | 1817 | if (!policydb_str) { |
454d972c | 1818 | printk(KERN_ERR "SELinux: unable to allocate memory for policydb " |
1da177e4 LT |
1819 | "string of length %d\n", len); |
1820 | rc = -ENOMEM; | |
1821 | goto bad; | |
1822 | } | |
1823 | rc = next_entry(policydb_str, fp, len); | |
1824 | if (rc < 0) { | |
454d972c | 1825 | printk(KERN_ERR "SELinux: truncated policydb string identifier\n"); |
1da177e4 LT |
1826 | kfree(policydb_str); |
1827 | goto bad; | |
1828 | } | |
df4ea865 | 1829 | policydb_str[len] = '\0'; |
1da177e4 | 1830 | if (strcmp(policydb_str, POLICYDB_STRING)) { |
454d972c | 1831 | printk(KERN_ERR "SELinux: policydb string %s does not match " |
1da177e4 LT |
1832 | "my string %s\n", policydb_str, POLICYDB_STRING); |
1833 | kfree(policydb_str); | |
1834 | goto bad; | |
1835 | } | |
1836 | /* Done with policydb_str. */ | |
1837 | kfree(policydb_str); | |
1838 | policydb_str = NULL; | |
1839 | ||
0719aaf5 | 1840 | /* Read the version and table sizes. */ |
1da177e4 LT |
1841 | rc = next_entry(buf, fp, sizeof(u32)*4); |
1842 | if (rc < 0) | |
1843 | goto bad; | |
1da177e4 | 1844 | |
b5bf6c55 | 1845 | p->policyvers = le32_to_cpu(buf[0]); |
1da177e4 LT |
1846 | if (p->policyvers < POLICYDB_VERSION_MIN || |
1847 | p->policyvers > POLICYDB_VERSION_MAX) { | |
454d972c | 1848 | printk(KERN_ERR "SELinux: policydb version %d does not match " |
2ced3dfd EP |
1849 | "my version range %d-%d\n", |
1850 | le32_to_cpu(buf[0]), POLICYDB_VERSION_MIN, POLICYDB_VERSION_MAX); | |
1851 | goto bad; | |
1da177e4 LT |
1852 | } |
1853 | ||
b5bf6c55 | 1854 | if ((le32_to_cpu(buf[1]) & POLICYDB_CONFIG_MLS)) { |
0719aaf5 | 1855 | p->mls_enabled = 1; |
1da177e4 LT |
1856 | |
1857 | if (p->policyvers < POLICYDB_VERSION_MLS) { | |
744ba35e EP |
1858 | printk(KERN_ERR "SELinux: security policydb version %d " |
1859 | "(MLS) not backwards compatible\n", | |
1860 | p->policyvers); | |
1da177e4 LT |
1861 | goto bad; |
1862 | } | |
1da177e4 | 1863 | } |
3f12070e EP |
1864 | p->reject_unknown = !!(le32_to_cpu(buf[1]) & REJECT_UNKNOWN); |
1865 | p->allow_unknown = !!(le32_to_cpu(buf[1]) & ALLOW_UNKNOWN); | |
1da177e4 | 1866 | |
3bb56b25 PM |
1867 | if (p->policyvers >= POLICYDB_VERSION_POLCAP && |
1868 | ebitmap_read(&p->policycaps, fp) != 0) | |
1869 | goto bad; | |
1870 | ||
64dbf074 EP |
1871 | if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE && |
1872 | ebitmap_read(&p->permissive_map, fp) != 0) | |
1873 | goto bad; | |
1874 | ||
1da177e4 LT |
1875 | info = policydb_lookup_compat(p->policyvers); |
1876 | if (!info) { | |
454d972c | 1877 | printk(KERN_ERR "SELinux: unable to find policy compat info " |
1da177e4 LT |
1878 | "for version %d\n", p->policyvers); |
1879 | goto bad; | |
1880 | } | |
1881 | ||
b5bf6c55 AD |
1882 | if (le32_to_cpu(buf[2]) != info->sym_num || |
1883 | le32_to_cpu(buf[3]) != info->ocon_num) { | |
454d972c | 1884 | printk(KERN_ERR "SELinux: policydb table sizes (%d,%d) do " |
b5bf6c55 AD |
1885 | "not match mine (%d,%d)\n", le32_to_cpu(buf[2]), |
1886 | le32_to_cpu(buf[3]), | |
1da177e4 LT |
1887 | info->sym_num, info->ocon_num); |
1888 | goto bad; | |
1889 | } | |
1890 | ||
1891 | for (i = 0; i < info->sym_num; i++) { | |
1892 | rc = next_entry(buf, fp, sizeof(u32)*2); | |
1893 | if (rc < 0) | |
1894 | goto bad; | |
1895 | nprim = le32_to_cpu(buf[0]); | |
1896 | nel = le32_to_cpu(buf[1]); | |
1897 | for (j = 0; j < nel; j++) { | |
1898 | rc = read_f[i](p, p->symtab[i].table, fp); | |
1899 | if (rc) | |
1900 | goto bad; | |
1901 | } | |
1902 | ||
1903 | p->symtab[i].nprim = nprim; | |
1904 | } | |
1905 | ||
45e5421e | 1906 | rc = avtab_read(&p->te_avtab, fp, p); |
1da177e4 LT |
1907 | if (rc) |
1908 | goto bad; | |
1909 | ||
1910 | if (p->policyvers >= POLICYDB_VERSION_BOOL) { | |
1911 | rc = cond_read_list(p, fp); | |
1912 | if (rc) | |
1913 | goto bad; | |
1914 | } | |
1915 | ||
1916 | rc = next_entry(buf, fp, sizeof(u32)); | |
1917 | if (rc < 0) | |
1918 | goto bad; | |
1919 | nel = le32_to_cpu(buf[0]); | |
1920 | ltr = NULL; | |
1921 | for (i = 0; i < nel; i++) { | |
89d155ef | 1922 | tr = kzalloc(sizeof(*tr), GFP_KERNEL); |
1da177e4 LT |
1923 | if (!tr) { |
1924 | rc = -ENOMEM; | |
1925 | goto bad; | |
1926 | } | |
2ced3dfd | 1927 | if (ltr) |
1da177e4 | 1928 | ltr->next = tr; |
2ced3dfd | 1929 | else |
1da177e4 | 1930 | p->role_tr = tr; |
1da177e4 LT |
1931 | rc = next_entry(buf, fp, sizeof(u32)*3); |
1932 | if (rc < 0) | |
1933 | goto bad; | |
1934 | tr->role = le32_to_cpu(buf[0]); | |
1935 | tr->type = le32_to_cpu(buf[1]); | |
1936 | tr->new_role = le32_to_cpu(buf[2]); | |
45e5421e SS |
1937 | if (!policydb_role_isvalid(p, tr->role) || |
1938 | !policydb_type_isvalid(p, tr->type) || | |
1939 | !policydb_role_isvalid(p, tr->new_role)) { | |
1940 | rc = -EINVAL; | |
1941 | goto bad; | |
1942 | } | |
1da177e4 LT |
1943 | ltr = tr; |
1944 | } | |
1945 | ||
1946 | rc = next_entry(buf, fp, sizeof(u32)); | |
1947 | if (rc < 0) | |
1948 | goto bad; | |
1949 | nel = le32_to_cpu(buf[0]); | |
1950 | lra = NULL; | |
1951 | for (i = 0; i < nel; i++) { | |
89d155ef | 1952 | ra = kzalloc(sizeof(*ra), GFP_KERNEL); |
1da177e4 LT |
1953 | if (!ra) { |
1954 | rc = -ENOMEM; | |
1955 | goto bad; | |
1956 | } | |
2ced3dfd | 1957 | if (lra) |
1da177e4 | 1958 | lra->next = ra; |
2ced3dfd | 1959 | else |
1da177e4 | 1960 | p->role_allow = ra; |
1da177e4 LT |
1961 | rc = next_entry(buf, fp, sizeof(u32)*2); |
1962 | if (rc < 0) | |
1963 | goto bad; | |
1964 | ra->role = le32_to_cpu(buf[0]); | |
1965 | ra->new_role = le32_to_cpu(buf[1]); | |
45e5421e SS |
1966 | if (!policydb_role_isvalid(p, ra->role) || |
1967 | !policydb_role_isvalid(p, ra->new_role)) { | |
1968 | rc = -EINVAL; | |
1969 | goto bad; | |
1970 | } | |
1da177e4 LT |
1971 | lra = ra; |
1972 | } | |
1973 | ||
1974 | rc = policydb_index_classes(p); | |
1975 | if (rc) | |
1976 | goto bad; | |
1977 | ||
1978 | rc = policydb_index_others(p); | |
1979 | if (rc) | |
1980 | goto bad; | |
1981 | ||
c6d3aaa4 SS |
1982 | p->process_class = string_to_security_class(p, "process"); |
1983 | if (!p->process_class) | |
1984 | goto bad; | |
1985 | p->process_trans_perms = string_to_av_perm(p, p->process_class, | |
1986 | "transition"); | |
1987 | p->process_trans_perms |= string_to_av_perm(p, p->process_class, | |
1988 | "dyntransition"); | |
1989 | if (!p->process_trans_perms) | |
1990 | goto bad; | |
1991 | ||
1da177e4 LT |
1992 | for (i = 0; i < info->ocon_num; i++) { |
1993 | rc = next_entry(buf, fp, sizeof(u32)); | |
1994 | if (rc < 0) | |
1995 | goto bad; | |
1996 | nel = le32_to_cpu(buf[0]); | |
1997 | l = NULL; | |
1998 | for (j = 0; j < nel; j++) { | |
89d155ef | 1999 | c = kzalloc(sizeof(*c), GFP_KERNEL); |
1da177e4 LT |
2000 | if (!c) { |
2001 | rc = -ENOMEM; | |
2002 | goto bad; | |
2003 | } | |
2ced3dfd | 2004 | if (l) |
1da177e4 | 2005 | l->next = c; |
2ced3dfd | 2006 | else |
1da177e4 | 2007 | p->ocontexts[i] = c; |
1da177e4 LT |
2008 | l = c; |
2009 | rc = -EINVAL; | |
2010 | switch (i) { | |
2011 | case OCON_ISID: | |
2012 | rc = next_entry(buf, fp, sizeof(u32)); | |
2013 | if (rc < 0) | |
2014 | goto bad; | |
2015 | c->sid[0] = le32_to_cpu(buf[0]); | |
2016 | rc = context_read_and_validate(&c->context[0], p, fp); | |
2017 | if (rc) | |
2018 | goto bad; | |
2019 | break; | |
2020 | case OCON_FS: | |
2021 | case OCON_NETIF: | |
2022 | rc = next_entry(buf, fp, sizeof(u32)); | |
2023 | if (rc < 0) | |
2024 | goto bad; | |
2025 | len = le32_to_cpu(buf[0]); | |
2ced3dfd | 2026 | c->u.name = kmalloc(len + 1, GFP_KERNEL); |
1da177e4 LT |
2027 | if (!c->u.name) { |
2028 | rc = -ENOMEM; | |
2029 | goto bad; | |
2030 | } | |
2031 | rc = next_entry(c->u.name, fp, len); | |
2032 | if (rc < 0) | |
2033 | goto bad; | |
2034 | c->u.name[len] = 0; | |
2035 | rc = context_read_and_validate(&c->context[0], p, fp); | |
2036 | if (rc) | |
2037 | goto bad; | |
2038 | rc = context_read_and_validate(&c->context[1], p, fp); | |
2039 | if (rc) | |
2040 | goto bad; | |
2041 | break; | |
2042 | case OCON_PORT: | |
2043 | rc = next_entry(buf, fp, sizeof(u32)*3); | |
2044 | if (rc < 0) | |
2045 | goto bad; | |
2046 | c->u.port.protocol = le32_to_cpu(buf[0]); | |
2047 | c->u.port.low_port = le32_to_cpu(buf[1]); | |
2048 | c->u.port.high_port = le32_to_cpu(buf[2]); | |
2049 | rc = context_read_and_validate(&c->context[0], p, fp); | |
2050 | if (rc) | |
2051 | goto bad; | |
2052 | break; | |
2053 | case OCON_NODE: | |
59dbd1ba | 2054 | rc = next_entry(nodebuf, fp, sizeof(u32) * 2); |
1da177e4 LT |
2055 | if (rc < 0) |
2056 | goto bad; | |
59dbd1ba SS |
2057 | c->u.node.addr = nodebuf[0]; /* network order */ |
2058 | c->u.node.mask = nodebuf[1]; /* network order */ | |
1da177e4 LT |
2059 | rc = context_read_and_validate(&c->context[0], p, fp); |
2060 | if (rc) | |
2061 | goto bad; | |
2062 | break; | |
2063 | case OCON_FSUSE: | |
2064 | rc = next_entry(buf, fp, sizeof(u32)*2); | |
2065 | if (rc < 0) | |
2066 | goto bad; | |
2067 | c->v.behavior = le32_to_cpu(buf[0]); | |
2068 | if (c->v.behavior > SECURITY_FS_USE_NONE) | |
2069 | goto bad; | |
2070 | len = le32_to_cpu(buf[1]); | |
2ced3dfd | 2071 | c->u.name = kmalloc(len + 1, GFP_KERNEL); |
1da177e4 LT |
2072 | if (!c->u.name) { |
2073 | rc = -ENOMEM; | |
2074 | goto bad; | |
2075 | } | |
2076 | rc = next_entry(c->u.name, fp, len); | |
2077 | if (rc < 0) | |
2078 | goto bad; | |
2079 | c->u.name[len] = 0; | |
2080 | rc = context_read_and_validate(&c->context[0], p, fp); | |
2081 | if (rc) | |
2082 | goto bad; | |
2083 | break; | |
2084 | case OCON_NODE6: { | |
2085 | int k; | |
2086 | ||
59dbd1ba | 2087 | rc = next_entry(nodebuf, fp, sizeof(u32) * 8); |
1da177e4 LT |
2088 | if (rc < 0) |
2089 | goto bad; | |
2090 | for (k = 0; k < 4; k++) | |
59dbd1ba | 2091 | c->u.node6.addr[k] = nodebuf[k]; |
1da177e4 | 2092 | for (k = 0; k < 4; k++) |
59dbd1ba | 2093 | c->u.node6.mask[k] = nodebuf[k+4]; |
1da177e4 LT |
2094 | if (context_read_and_validate(&c->context[0], p, fp)) |
2095 | goto bad; | |
2096 | break; | |
2097 | } | |
2098 | } | |
2099 | } | |
2100 | } | |
2101 | ||
2102 | rc = next_entry(buf, fp, sizeof(u32)); | |
2103 | if (rc < 0) | |
2104 | goto bad; | |
2105 | nel = le32_to_cpu(buf[0]); | |
2106 | genfs_p = NULL; | |
2107 | rc = -EINVAL; | |
2108 | for (i = 0; i < nel; i++) { | |
2109 | rc = next_entry(buf, fp, sizeof(u32)); | |
2110 | if (rc < 0) | |
2111 | goto bad; | |
2112 | len = le32_to_cpu(buf[0]); | |
89d155ef | 2113 | newgenfs = kzalloc(sizeof(*newgenfs), GFP_KERNEL); |
1da177e4 LT |
2114 | if (!newgenfs) { |
2115 | rc = -ENOMEM; | |
2116 | goto bad; | |
2117 | } | |
1da177e4 | 2118 | |
2ced3dfd | 2119 | newgenfs->fstype = kmalloc(len + 1, GFP_KERNEL); |
1da177e4 LT |
2120 | if (!newgenfs->fstype) { |
2121 | rc = -ENOMEM; | |
2122 | kfree(newgenfs); | |
2123 | goto bad; | |
2124 | } | |
2125 | rc = next_entry(newgenfs->fstype, fp, len); | |
2126 | if (rc < 0) { | |
2127 | kfree(newgenfs->fstype); | |
2128 | kfree(newgenfs); | |
2129 | goto bad; | |
2130 | } | |
2131 | newgenfs->fstype[len] = 0; | |
2132 | for (genfs_p = NULL, genfs = p->genfs; genfs; | |
2133 | genfs_p = genfs, genfs = genfs->next) { | |
2134 | if (strcmp(newgenfs->fstype, genfs->fstype) == 0) { | |
454d972c | 2135 | printk(KERN_ERR "SELinux: dup genfs " |
1da177e4 LT |
2136 | "fstype %s\n", newgenfs->fstype); |
2137 | kfree(newgenfs->fstype); | |
2138 | kfree(newgenfs); | |
2139 | goto bad; | |
2140 | } | |
2141 | if (strcmp(newgenfs->fstype, genfs->fstype) < 0) | |
2142 | break; | |
2143 | } | |
2144 | newgenfs->next = genfs; | |
2145 | if (genfs_p) | |
2146 | genfs_p->next = newgenfs; | |
2147 | else | |
2148 | p->genfs = newgenfs; | |
2149 | rc = next_entry(buf, fp, sizeof(u32)); | |
2150 | if (rc < 0) | |
2151 | goto bad; | |
2152 | nel2 = le32_to_cpu(buf[0]); | |
2153 | for (j = 0; j < nel2; j++) { | |
2154 | rc = next_entry(buf, fp, sizeof(u32)); | |
2155 | if (rc < 0) | |
2156 | goto bad; | |
2157 | len = le32_to_cpu(buf[0]); | |
2158 | ||
89d155ef | 2159 | newc = kzalloc(sizeof(*newc), GFP_KERNEL); |
1da177e4 LT |
2160 | if (!newc) { |
2161 | rc = -ENOMEM; | |
2162 | goto bad; | |
2163 | } | |
1da177e4 | 2164 | |
2ced3dfd | 2165 | newc->u.name = kmalloc(len + 1, GFP_KERNEL); |
1da177e4 LT |
2166 | if (!newc->u.name) { |
2167 | rc = -ENOMEM; | |
2168 | goto bad_newc; | |
2169 | } | |
2170 | rc = next_entry(newc->u.name, fp, len); | |
2171 | if (rc < 0) | |
2172 | goto bad_newc; | |
2173 | newc->u.name[len] = 0; | |
2174 | rc = next_entry(buf, fp, sizeof(u32)); | |
2175 | if (rc < 0) | |
2176 | goto bad_newc; | |
2177 | newc->v.sclass = le32_to_cpu(buf[0]); | |
2178 | if (context_read_and_validate(&newc->context[0], p, fp)) | |
2179 | goto bad_newc; | |
2180 | for (l = NULL, c = newgenfs->head; c; | |
2181 | l = c, c = c->next) { | |
2182 | if (!strcmp(newc->u.name, c->u.name) && | |
2183 | (!c->v.sclass || !newc->v.sclass || | |
2184 | newc->v.sclass == c->v.sclass)) { | |
454d972c | 2185 | printk(KERN_ERR "SELinux: dup genfs " |
1da177e4 LT |
2186 | "entry (%s,%s)\n", |
2187 | newgenfs->fstype, c->u.name); | |
2188 | goto bad_newc; | |
2189 | } | |
2190 | len = strlen(newc->u.name); | |
2191 | len2 = strlen(c->u.name); | |
2192 | if (len > len2) | |
2193 | break; | |
2194 | } | |
2195 | ||
2196 | newc->next = c; | |
2197 | if (l) | |
2198 | l->next = newc; | |
2199 | else | |
2200 | newgenfs->head = newc; | |
2201 | } | |
2202 | } | |
2203 | ||
9ee0c823 EP |
2204 | rc = range_read(p, fp); |
2205 | if (rc) | |
2206 | goto bad; | |
1da177e4 | 2207 | |
c1a7368a | 2208 | p->type_attr_map = kmalloc(p->p_types.nprim * sizeof(struct ebitmap), GFP_KERNEL); |
782ebb99 SS |
2209 | if (!p->type_attr_map) |
2210 | goto bad; | |
2211 | ||
2212 | for (i = 0; i < p->p_types.nprim; i++) { | |
2213 | ebitmap_init(&p->type_attr_map[i]); | |
2214 | if (p->policyvers >= POLICYDB_VERSION_AVTAB) { | |
2215 | if (ebitmap_read(&p->type_attr_map[i], fp)) | |
2216 | goto bad; | |
2217 | } | |
2218 | /* add the type itself as the degenerate case */ | |
2219 | if (ebitmap_set_bit(&p->type_attr_map[i], i, 1)) | |
2220 | goto bad; | |
2221 | } | |
2222 | ||
d9250dea KK |
2223 | rc = policydb_bounds_sanity_check(p); |
2224 | if (rc) | |
2225 | goto bad; | |
2226 | ||
1da177e4 LT |
2227 | rc = 0; |
2228 | out: | |
2229 | return rc; | |
2230 | bad_newc: | |
2ced3dfd | 2231 | ocontext_destroy(newc, OCON_FSUSE); |
1da177e4 LT |
2232 | bad: |
2233 | if (!rc) | |
2234 | rc = -EINVAL; | |
2235 | policydb_destroy(p); | |
2236 | goto out; | |
2237 | } |