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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Implementation of the policy database. | |
3 | * | |
4 | * Author : Stephen Smalley, <sds@epoch.ncsc.mil> | |
5 | */ | |
6 | ||
7 | /* | |
8 | * Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com> | |
9 | * | |
10 | * Support for enhanced MLS infrastructure. | |
11 | * | |
12 | * Updated: Frank Mayer <mayerf@tresys.com> and Karl MacMillan <kmacmillan@tresys.com> | |
13 | * | |
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> |
6371dcd3 | 34 | #include <linux/flex_array.h> |
1da177e4 LT |
35 | #include "security.h" |
36 | ||
37 | #include "policydb.h" | |
38 | #include "conditional.h" | |
39 | #include "mls.h" | |
cee74f47 | 40 | #include "services.h" |
1da177e4 LT |
41 | |
42 | #define _DEBUG_HASHES | |
43 | ||
44 | #ifdef DEBUG_HASHES | |
634a539e | 45 | static const char *symtab_name[SYM_NUM] = { |
1da177e4 LT |
46 | "common prefixes", |
47 | "classes", | |
48 | "roles", | |
49 | "types", | |
50 | "users", | |
51 | "bools", | |
52 | "levels", | |
53 | "categories", | |
54 | }; | |
55 | #endif | |
56 | ||
1da177e4 LT |
57 | static unsigned int symtab_sizes[SYM_NUM] = { |
58 | 2, | |
59 | 32, | |
60 | 16, | |
61 | 512, | |
62 | 128, | |
63 | 16, | |
64 | 16, | |
65 | 16, | |
66 | }; | |
67 | ||
68 | struct policydb_compat_info { | |
69 | int version; | |
70 | int sym_num; | |
71 | int ocon_num; | |
72 | }; | |
73 | ||
74 | /* These need to be updated if SYM_NUM or OCON_NUM changes */ | |
75 | static struct policydb_compat_info policydb_compat[] = { | |
76 | { | |
2ced3dfd EP |
77 | .version = POLICYDB_VERSION_BASE, |
78 | .sym_num = SYM_NUM - 3, | |
79 | .ocon_num = OCON_NUM - 1, | |
1da177e4 LT |
80 | }, |
81 | { | |
2ced3dfd EP |
82 | .version = POLICYDB_VERSION_BOOL, |
83 | .sym_num = SYM_NUM - 2, | |
84 | .ocon_num = OCON_NUM - 1, | |
1da177e4 LT |
85 | }, |
86 | { | |
2ced3dfd EP |
87 | .version = POLICYDB_VERSION_IPV6, |
88 | .sym_num = SYM_NUM - 2, | |
89 | .ocon_num = OCON_NUM, | |
1da177e4 LT |
90 | }, |
91 | { | |
2ced3dfd EP |
92 | .version = POLICYDB_VERSION_NLCLASS, |
93 | .sym_num = SYM_NUM - 2, | |
94 | .ocon_num = OCON_NUM, | |
1da177e4 LT |
95 | }, |
96 | { | |
2ced3dfd EP |
97 | .version = POLICYDB_VERSION_MLS, |
98 | .sym_num = SYM_NUM, | |
99 | .ocon_num = OCON_NUM, | |
1da177e4 | 100 | }, |
782ebb99 | 101 | { |
2ced3dfd EP |
102 | .version = POLICYDB_VERSION_AVTAB, |
103 | .sym_num = SYM_NUM, | |
104 | .ocon_num = OCON_NUM, | |
782ebb99 | 105 | }, |
f3f87714 | 106 | { |
2ced3dfd EP |
107 | .version = POLICYDB_VERSION_RANGETRANS, |
108 | .sym_num = SYM_NUM, | |
109 | .ocon_num = OCON_NUM, | |
f3f87714 | 110 | }, |
3bb56b25 PM |
111 | { |
112 | .version = POLICYDB_VERSION_POLCAP, | |
113 | .sym_num = SYM_NUM, | |
114 | .ocon_num = OCON_NUM, | |
64dbf074 EP |
115 | }, |
116 | { | |
117 | .version = POLICYDB_VERSION_PERMISSIVE, | |
118 | .sym_num = SYM_NUM, | |
119 | .ocon_num = OCON_NUM, | |
d9250dea KK |
120 | }, |
121 | { | |
122 | .version = POLICYDB_VERSION_BOUNDARY, | |
123 | .sym_num = SYM_NUM, | |
124 | .ocon_num = OCON_NUM, | |
125 | }, | |
1da177e4 LT |
126 | }; |
127 | ||
128 | static struct policydb_compat_info *policydb_lookup_compat(int version) | |
129 | { | |
130 | int i; | |
131 | struct policydb_compat_info *info = NULL; | |
132 | ||
32725ad8 | 133 | for (i = 0; i < ARRAY_SIZE(policydb_compat); i++) { |
1da177e4 LT |
134 | if (policydb_compat[i].version == version) { |
135 | info = &policydb_compat[i]; | |
136 | break; | |
137 | } | |
138 | } | |
139 | return info; | |
140 | } | |
141 | ||
142 | /* | |
143 | * Initialize the role table. | |
144 | */ | |
145 | static int roles_init(struct policydb *p) | |
146 | { | |
147 | char *key = NULL; | |
148 | int rc; | |
149 | struct role_datum *role; | |
150 | ||
89d155ef | 151 | role = kzalloc(sizeof(*role), GFP_KERNEL); |
1da177e4 LT |
152 | if (!role) { |
153 | rc = -ENOMEM; | |
154 | goto out; | |
155 | } | |
1da177e4 LT |
156 | role->value = ++p->p_roles.nprim; |
157 | if (role->value != OBJECT_R_VAL) { | |
158 | rc = -EINVAL; | |
159 | goto out_free_role; | |
160 | } | |
b3139bbc | 161 | key = kstrdup(OBJECT_R, GFP_KERNEL); |
1da177e4 LT |
162 | if (!key) { |
163 | rc = -ENOMEM; | |
164 | goto out_free_role; | |
165 | } | |
1da177e4 LT |
166 | rc = hashtab_insert(p->p_roles.table, key, role); |
167 | if (rc) | |
168 | goto out_free_key; | |
169 | out: | |
170 | return rc; | |
171 | ||
172 | out_free_key: | |
173 | kfree(key); | |
174 | out_free_role: | |
175 | kfree(role); | |
176 | goto out; | |
177 | } | |
178 | ||
2f3e82d6 SS |
179 | static u32 rangetr_hash(struct hashtab *h, const void *k) |
180 | { | |
181 | const struct range_trans *key = k; | |
182 | return (key->source_type + (key->target_type << 3) + | |
183 | (key->target_class << 5)) & (h->size - 1); | |
184 | } | |
185 | ||
186 | static int rangetr_cmp(struct hashtab *h, const void *k1, const void *k2) | |
187 | { | |
188 | const struct range_trans *key1 = k1, *key2 = k2; | |
4419aae1 EP |
189 | int v; |
190 | ||
191 | v = key1->source_type - key2->source_type; | |
192 | if (v) | |
193 | return v; | |
194 | ||
195 | v = key1->target_type - key2->target_type; | |
196 | if (v) | |
197 | return v; | |
198 | ||
199 | v = key1->target_class - key2->target_class; | |
200 | ||
201 | return v; | |
2f3e82d6 SS |
202 | } |
203 | ||
1da177e4 LT |
204 | /* |
205 | * Initialize a policy database structure. | |
206 | */ | |
207 | static int policydb_init(struct policydb *p) | |
208 | { | |
209 | int i, rc; | |
210 | ||
211 | memset(p, 0, sizeof(*p)); | |
212 | ||
213 | for (i = 0; i < SYM_NUM; i++) { | |
214 | rc = symtab_init(&p->symtab[i], symtab_sizes[i]); | |
215 | if (rc) | |
216 | goto out_free_symtab; | |
217 | } | |
218 | ||
219 | rc = avtab_init(&p->te_avtab); | |
220 | if (rc) | |
221 | goto out_free_symtab; | |
222 | ||
223 | rc = roles_init(p); | |
224 | if (rc) | |
3232c110 | 225 | goto out_free_symtab; |
1da177e4 LT |
226 | |
227 | rc = cond_policydb_init(p); | |
228 | if (rc) | |
3232c110 | 229 | goto out_free_symtab; |
1da177e4 | 230 | |
2f3e82d6 SS |
231 | p->range_tr = hashtab_create(rangetr_hash, rangetr_cmp, 256); |
232 | if (!p->range_tr) | |
233 | goto out_free_symtab; | |
234 | ||
3bb56b25 | 235 | ebitmap_init(&p->policycaps); |
64dbf074 | 236 | ebitmap_init(&p->permissive_map); |
3bb56b25 | 237 | |
1da177e4 LT |
238 | out: |
239 | return rc; | |
240 | ||
1da177e4 LT |
241 | out_free_symtab: |
242 | for (i = 0; i < SYM_NUM; i++) | |
243 | hashtab_destroy(p->symtab[i].table); | |
244 | goto out; | |
245 | } | |
246 | ||
247 | /* | |
248 | * The following *_index functions are used to | |
249 | * define the val_to_name and val_to_struct arrays | |
250 | * in a policy database structure. The val_to_name | |
251 | * arrays are used when converting security context | |
252 | * structures into string representations. The | |
253 | * val_to_struct arrays are used when the attributes | |
254 | * of a class, role, or user are needed. | |
255 | */ | |
256 | ||
257 | static int common_index(void *key, void *datum, void *datap) | |
258 | { | |
259 | struct policydb *p; | |
260 | struct common_datum *comdatum; | |
261 | ||
262 | comdatum = datum; | |
263 | p = datap; | |
264 | if (!comdatum->value || comdatum->value > p->p_commons.nprim) | |
265 | return -EINVAL; | |
266 | p->p_common_val_to_name[comdatum->value - 1] = key; | |
267 | return 0; | |
268 | } | |
269 | ||
270 | static int class_index(void *key, void *datum, void *datap) | |
271 | { | |
272 | struct policydb *p; | |
273 | struct class_datum *cladatum; | |
274 | ||
275 | cladatum = datum; | |
276 | p = datap; | |
277 | if (!cladatum->value || cladatum->value > p->p_classes.nprim) | |
278 | return -EINVAL; | |
279 | p->p_class_val_to_name[cladatum->value - 1] = key; | |
280 | p->class_val_to_struct[cladatum->value - 1] = cladatum; | |
281 | return 0; | |
282 | } | |
283 | ||
284 | static int role_index(void *key, void *datum, void *datap) | |
285 | { | |
286 | struct policydb *p; | |
287 | struct role_datum *role; | |
288 | ||
289 | role = datum; | |
290 | p = datap; | |
d9250dea KK |
291 | if (!role->value |
292 | || role->value > p->p_roles.nprim | |
293 | || role->bounds > p->p_roles.nprim) | |
1da177e4 LT |
294 | return -EINVAL; |
295 | p->p_role_val_to_name[role->value - 1] = key; | |
296 | p->role_val_to_struct[role->value - 1] = role; | |
297 | return 0; | |
298 | } | |
299 | ||
300 | static int type_index(void *key, void *datum, void *datap) | |
301 | { | |
302 | struct policydb *p; | |
303 | struct type_datum *typdatum; | |
304 | ||
305 | typdatum = datum; | |
306 | p = datap; | |
307 | ||
308 | if (typdatum->primary) { | |
d9250dea KK |
309 | if (!typdatum->value |
310 | || typdatum->value > p->p_types.nprim | |
311 | || typdatum->bounds > p->p_types.nprim) | |
1da177e4 LT |
312 | return -EINVAL; |
313 | p->p_type_val_to_name[typdatum->value - 1] = key; | |
d9250dea | 314 | p->type_val_to_struct[typdatum->value - 1] = typdatum; |
1da177e4 LT |
315 | } |
316 | ||
317 | return 0; | |
318 | } | |
319 | ||
320 | static int user_index(void *key, void *datum, void *datap) | |
321 | { | |
322 | struct policydb *p; | |
323 | struct user_datum *usrdatum; | |
324 | ||
325 | usrdatum = datum; | |
326 | p = datap; | |
d9250dea KK |
327 | if (!usrdatum->value |
328 | || usrdatum->value > p->p_users.nprim | |
329 | || usrdatum->bounds > p->p_users.nprim) | |
1da177e4 LT |
330 | return -EINVAL; |
331 | p->p_user_val_to_name[usrdatum->value - 1] = key; | |
332 | p->user_val_to_struct[usrdatum->value - 1] = usrdatum; | |
333 | return 0; | |
334 | } | |
335 | ||
336 | static int sens_index(void *key, void *datum, void *datap) | |
337 | { | |
338 | struct policydb *p; | |
339 | struct level_datum *levdatum; | |
340 | ||
341 | levdatum = datum; | |
342 | p = datap; | |
343 | ||
344 | if (!levdatum->isalias) { | |
345 | if (!levdatum->level->sens || | |
346 | levdatum->level->sens > p->p_levels.nprim) | |
347 | return -EINVAL; | |
348 | p->p_sens_val_to_name[levdatum->level->sens - 1] = key; | |
349 | } | |
350 | ||
351 | return 0; | |
352 | } | |
353 | ||
354 | static int cat_index(void *key, void *datum, void *datap) | |
355 | { | |
356 | struct policydb *p; | |
357 | struct cat_datum *catdatum; | |
358 | ||
359 | catdatum = datum; | |
360 | p = datap; | |
361 | ||
362 | if (!catdatum->isalias) { | |
363 | if (!catdatum->value || catdatum->value > p->p_cats.nprim) | |
364 | return -EINVAL; | |
365 | p->p_cat_val_to_name[catdatum->value - 1] = key; | |
366 | } | |
367 | ||
368 | return 0; | |
369 | } | |
370 | ||
371 | static int (*index_f[SYM_NUM]) (void *key, void *datum, void *datap) = | |
372 | { | |
373 | common_index, | |
374 | class_index, | |
375 | role_index, | |
376 | type_index, | |
377 | user_index, | |
378 | cond_index_bool, | |
379 | sens_index, | |
380 | cat_index, | |
381 | }; | |
382 | ||
383 | /* | |
384 | * Define the common val_to_name array and the class | |
385 | * val_to_name and val_to_struct arrays in a policy | |
386 | * database structure. | |
387 | * | |
388 | * Caller must clean up upon failure. | |
389 | */ | |
390 | static int policydb_index_classes(struct policydb *p) | |
391 | { | |
392 | int rc; | |
393 | ||
394 | p->p_common_val_to_name = | |
395 | kmalloc(p->p_commons.nprim * sizeof(char *), GFP_KERNEL); | |
396 | if (!p->p_common_val_to_name) { | |
397 | rc = -ENOMEM; | |
398 | goto out; | |
399 | } | |
400 | ||
401 | rc = hashtab_map(p->p_commons.table, common_index, p); | |
402 | if (rc) | |
403 | goto out; | |
404 | ||
405 | p->class_val_to_struct = | |
406 | kmalloc(p->p_classes.nprim * sizeof(*(p->class_val_to_struct)), GFP_KERNEL); | |
407 | if (!p->class_val_to_struct) { | |
408 | rc = -ENOMEM; | |
409 | goto out; | |
410 | } | |
411 | ||
412 | p->p_class_val_to_name = | |
413 | kmalloc(p->p_classes.nprim * sizeof(char *), GFP_KERNEL); | |
414 | if (!p->p_class_val_to_name) { | |
415 | rc = -ENOMEM; | |
416 | goto out; | |
417 | } | |
418 | ||
419 | rc = hashtab_map(p->p_classes.table, class_index, p); | |
420 | out: | |
421 | return rc; | |
422 | } | |
423 | ||
424 | #ifdef DEBUG_HASHES | |
425 | static void symtab_hash_eval(struct symtab *s) | |
426 | { | |
427 | int i; | |
428 | ||
429 | for (i = 0; i < SYM_NUM; i++) { | |
430 | struct hashtab *h = s[i].table; | |
431 | struct hashtab_info info; | |
432 | ||
433 | hashtab_stat(h, &info); | |
744ba35e | 434 | printk(KERN_DEBUG "SELinux: %s: %d entries and %d/%d buckets used, " |
1da177e4 LT |
435 | "longest chain length %d\n", symtab_name[i], h->nel, |
436 | info.slots_used, h->size, info.max_chain_len); | |
437 | } | |
438 | } | |
2f3e82d6 SS |
439 | |
440 | static void rangetr_hash_eval(struct hashtab *h) | |
441 | { | |
442 | struct hashtab_info info; | |
443 | ||
444 | hashtab_stat(h, &info); | |
445 | printk(KERN_DEBUG "SELinux: rangetr: %d entries and %d/%d buckets used, " | |
446 | "longest chain length %d\n", h->nel, | |
447 | info.slots_used, h->size, info.max_chain_len); | |
448 | } | |
449 | #else | |
450 | static inline void rangetr_hash_eval(struct hashtab *h) | |
451 | { | |
452 | } | |
1da177e4 LT |
453 | #endif |
454 | ||
455 | /* | |
456 | * Define the other val_to_name and val_to_struct arrays | |
457 | * in a policy database structure. | |
458 | * | |
459 | * Caller must clean up on failure. | |
460 | */ | |
461 | static int policydb_index_others(struct policydb *p) | |
462 | { | |
463 | int i, rc = 0; | |
464 | ||
454d972c | 465 | printk(KERN_DEBUG "SELinux: %d users, %d roles, %d types, %d bools", |
1da177e4 | 466 | p->p_users.nprim, p->p_roles.nprim, p->p_types.nprim, p->p_bools.nprim); |
0719aaf5 | 467 | if (p->mls_enabled) |
1da177e4 LT |
468 | printk(", %d sens, %d cats", p->p_levels.nprim, |
469 | p->p_cats.nprim); | |
470 | printk("\n"); | |
471 | ||
454d972c | 472 | printk(KERN_DEBUG "SELinux: %d classes, %d rules\n", |
1da177e4 LT |
473 | p->p_classes.nprim, p->te_avtab.nel); |
474 | ||
475 | #ifdef DEBUG_HASHES | |
476 | avtab_hash_eval(&p->te_avtab, "rules"); | |
477 | symtab_hash_eval(p->symtab); | |
478 | #endif | |
479 | ||
480 | p->role_val_to_struct = | |
481 | kmalloc(p->p_roles.nprim * sizeof(*(p->role_val_to_struct)), | |
2ced3dfd | 482 | GFP_KERNEL); |
1da177e4 LT |
483 | if (!p->role_val_to_struct) { |
484 | rc = -ENOMEM; | |
485 | goto out; | |
486 | } | |
487 | ||
488 | p->user_val_to_struct = | |
489 | kmalloc(p->p_users.nprim * sizeof(*(p->user_val_to_struct)), | |
2ced3dfd | 490 | GFP_KERNEL); |
1da177e4 LT |
491 | if (!p->user_val_to_struct) { |
492 | rc = -ENOMEM; | |
493 | goto out; | |
494 | } | |
495 | ||
d9250dea KK |
496 | p->type_val_to_struct = |
497 | kmalloc(p->p_types.nprim * sizeof(*(p->type_val_to_struct)), | |
498 | GFP_KERNEL); | |
499 | if (!p->type_val_to_struct) { | |
500 | rc = -ENOMEM; | |
501 | goto out; | |
502 | } | |
503 | ||
1da177e4 LT |
504 | if (cond_init_bool_indexes(p)) { |
505 | rc = -ENOMEM; | |
506 | goto out; | |
507 | } | |
508 | ||
509 | for (i = SYM_ROLES; i < SYM_NUM; i++) { | |
510 | p->sym_val_to_name[i] = | |
511 | kmalloc(p->symtab[i].nprim * sizeof(char *), GFP_KERNEL); | |
512 | if (!p->sym_val_to_name[i]) { | |
513 | rc = -ENOMEM; | |
514 | goto out; | |
515 | } | |
516 | rc = hashtab_map(p->symtab[i].table, index_f[i], p); | |
517 | if (rc) | |
518 | goto out; | |
519 | } | |
520 | ||
521 | out: | |
522 | return rc; | |
523 | } | |
524 | ||
525 | /* | |
526 | * The following *_destroy functions are used to | |
527 | * free any memory allocated for each kind of | |
528 | * symbol data in the policy database. | |
529 | */ | |
530 | ||
531 | static int perm_destroy(void *key, void *datum, void *p) | |
532 | { | |
533 | kfree(key); | |
534 | kfree(datum); | |
535 | return 0; | |
536 | } | |
537 | ||
538 | static int common_destroy(void *key, void *datum, void *p) | |
539 | { | |
540 | struct common_datum *comdatum; | |
541 | ||
542 | kfree(key); | |
543 | comdatum = datum; | |
544 | hashtab_map(comdatum->permissions.table, perm_destroy, NULL); | |
545 | hashtab_destroy(comdatum->permissions.table); | |
546 | kfree(datum); | |
547 | return 0; | |
548 | } | |
549 | ||
6cbda6b6 | 550 | static int cls_destroy(void *key, void *datum, void *p) |
1da177e4 LT |
551 | { |
552 | struct class_datum *cladatum; | |
553 | struct constraint_node *constraint, *ctemp; | |
554 | struct constraint_expr *e, *etmp; | |
555 | ||
556 | kfree(key); | |
557 | cladatum = datum; | |
558 | hashtab_map(cladatum->permissions.table, perm_destroy, NULL); | |
559 | hashtab_destroy(cladatum->permissions.table); | |
560 | constraint = cladatum->constraints; | |
561 | while (constraint) { | |
562 | e = constraint->expr; | |
563 | while (e) { | |
564 | ebitmap_destroy(&e->names); | |
565 | etmp = e; | |
566 | e = e->next; | |
567 | kfree(etmp); | |
568 | } | |
569 | ctemp = constraint; | |
570 | constraint = constraint->next; | |
571 | kfree(ctemp); | |
572 | } | |
573 | ||
574 | constraint = cladatum->validatetrans; | |
575 | while (constraint) { | |
576 | e = constraint->expr; | |
577 | while (e) { | |
578 | ebitmap_destroy(&e->names); | |
579 | etmp = e; | |
580 | e = e->next; | |
581 | kfree(etmp); | |
582 | } | |
583 | ctemp = constraint; | |
584 | constraint = constraint->next; | |
585 | kfree(ctemp); | |
586 | } | |
587 | ||
588 | kfree(cladatum->comkey); | |
589 | kfree(datum); | |
590 | return 0; | |
591 | } | |
592 | ||
593 | static int role_destroy(void *key, void *datum, void *p) | |
594 | { | |
595 | struct role_datum *role; | |
596 | ||
597 | kfree(key); | |
598 | role = datum; | |
599 | ebitmap_destroy(&role->dominates); | |
600 | ebitmap_destroy(&role->types); | |
601 | kfree(datum); | |
602 | return 0; | |
603 | } | |
604 | ||
605 | static int type_destroy(void *key, void *datum, void *p) | |
606 | { | |
607 | kfree(key); | |
608 | kfree(datum); | |
609 | return 0; | |
610 | } | |
611 | ||
612 | static int user_destroy(void *key, void *datum, void *p) | |
613 | { | |
614 | struct user_datum *usrdatum; | |
615 | ||
616 | kfree(key); | |
617 | usrdatum = datum; | |
618 | ebitmap_destroy(&usrdatum->roles); | |
619 | ebitmap_destroy(&usrdatum->range.level[0].cat); | |
620 | ebitmap_destroy(&usrdatum->range.level[1].cat); | |
621 | ebitmap_destroy(&usrdatum->dfltlevel.cat); | |
622 | kfree(datum); | |
623 | return 0; | |
624 | } | |
625 | ||
626 | static int sens_destroy(void *key, void *datum, void *p) | |
627 | { | |
628 | struct level_datum *levdatum; | |
629 | ||
630 | kfree(key); | |
631 | levdatum = datum; | |
632 | ebitmap_destroy(&levdatum->level->cat); | |
633 | kfree(levdatum->level); | |
634 | kfree(datum); | |
635 | return 0; | |
636 | } | |
637 | ||
638 | static int cat_destroy(void *key, void *datum, void *p) | |
639 | { | |
640 | kfree(key); | |
641 | kfree(datum); | |
642 | return 0; | |
643 | } | |
644 | ||
645 | static int (*destroy_f[SYM_NUM]) (void *key, void *datum, void *datap) = | |
646 | { | |
647 | common_destroy, | |
6cbda6b6 | 648 | cls_destroy, |
1da177e4 LT |
649 | role_destroy, |
650 | type_destroy, | |
651 | user_destroy, | |
652 | cond_destroy_bool, | |
653 | sens_destroy, | |
654 | cat_destroy, | |
655 | }; | |
656 | ||
2f3e82d6 SS |
657 | static int range_tr_destroy(void *key, void *datum, void *p) |
658 | { | |
659 | struct mls_range *rt = datum; | |
660 | kfree(key); | |
661 | ebitmap_destroy(&rt->level[0].cat); | |
662 | ebitmap_destroy(&rt->level[1].cat); | |
663 | kfree(datum); | |
664 | cond_resched(); | |
665 | return 0; | |
666 | } | |
667 | ||
1da177e4 LT |
668 | static void ocontext_destroy(struct ocontext *c, int i) |
669 | { | |
d1b43547 EP |
670 | if (!c) |
671 | return; | |
672 | ||
1da177e4 LT |
673 | context_destroy(&c->context[0]); |
674 | context_destroy(&c->context[1]); | |
675 | if (i == OCON_ISID || i == OCON_FS || | |
676 | i == OCON_NETIF || i == OCON_FSUSE) | |
677 | kfree(c->u.name); | |
678 | kfree(c); | |
679 | } | |
680 | ||
681 | /* | |
682 | * Free any memory allocated by a policy database structure. | |
683 | */ | |
684 | void policydb_destroy(struct policydb *p) | |
685 | { | |
686 | struct ocontext *c, *ctmp; | |
687 | struct genfs *g, *gtmp; | |
688 | int i; | |
782ebb99 SS |
689 | struct role_allow *ra, *lra = NULL; |
690 | struct role_trans *tr, *ltr = NULL; | |
1da177e4 LT |
691 | |
692 | for (i = 0; i < SYM_NUM; i++) { | |
9dc99780 | 693 | cond_resched(); |
1da177e4 LT |
694 | hashtab_map(p->symtab[i].table, destroy_f[i], NULL); |
695 | hashtab_destroy(p->symtab[i].table); | |
696 | } | |
697 | ||
9a5f04bf JJ |
698 | for (i = 0; i < SYM_NUM; i++) |
699 | kfree(p->sym_val_to_name[i]); | |
1da177e4 | 700 | |
9a5f04bf JJ |
701 | kfree(p->class_val_to_struct); |
702 | kfree(p->role_val_to_struct); | |
703 | kfree(p->user_val_to_struct); | |
d9250dea | 704 | kfree(p->type_val_to_struct); |
1da177e4 LT |
705 | |
706 | avtab_destroy(&p->te_avtab); | |
707 | ||
708 | for (i = 0; i < OCON_NUM; i++) { | |
9dc99780 | 709 | cond_resched(); |
1da177e4 LT |
710 | c = p->ocontexts[i]; |
711 | while (c) { | |
712 | ctmp = c; | |
713 | c = c->next; | |
2ced3dfd | 714 | ocontext_destroy(ctmp, i); |
1da177e4 | 715 | } |
6e8c751e | 716 | p->ocontexts[i] = NULL; |
1da177e4 LT |
717 | } |
718 | ||
719 | g = p->genfs; | |
720 | while (g) { | |
9dc99780 | 721 | cond_resched(); |
1da177e4 LT |
722 | kfree(g->fstype); |
723 | c = g->head; | |
724 | while (c) { | |
725 | ctmp = c; | |
726 | c = c->next; | |
2ced3dfd | 727 | ocontext_destroy(ctmp, OCON_FSUSE); |
1da177e4 LT |
728 | } |
729 | gtmp = g; | |
730 | g = g->next; | |
731 | kfree(gtmp); | |
732 | } | |
6e8c751e | 733 | p->genfs = NULL; |
1da177e4 LT |
734 | |
735 | cond_policydb_destroy(p); | |
736 | ||
782ebb99 | 737 | for (tr = p->role_tr; tr; tr = tr->next) { |
9dc99780 | 738 | cond_resched(); |
a7f988ba | 739 | kfree(ltr); |
782ebb99 SS |
740 | ltr = tr; |
741 | } | |
a7f988ba | 742 | kfree(ltr); |
782ebb99 | 743 | |
2ced3dfd | 744 | for (ra = p->role_allow; ra; ra = ra->next) { |
9dc99780 | 745 | cond_resched(); |
a7f988ba | 746 | kfree(lra); |
782ebb99 SS |
747 | lra = ra; |
748 | } | |
a7f988ba | 749 | kfree(lra); |
782ebb99 | 750 | |
2f3e82d6 SS |
751 | hashtab_map(p->range_tr, range_tr_destroy, NULL); |
752 | hashtab_destroy(p->range_tr); | |
782ebb99 | 753 | |
6371dcd3 EP |
754 | if (p->type_attr_map_array) { |
755 | for (i = 0; i < p->p_types.nprim; i++) { | |
756 | struct ebitmap *e; | |
757 | ||
758 | e = flex_array_get(p->type_attr_map_array, i); | |
759 | if (!e) | |
760 | continue; | |
761 | ebitmap_destroy(e); | |
762 | } | |
763 | flex_array_free(p->type_attr_map_array); | |
282c1f5e | 764 | } |
3bb56b25 | 765 | ebitmap_destroy(&p->policycaps); |
64dbf074 | 766 | ebitmap_destroy(&p->permissive_map); |
3f12070e | 767 | |
1da177e4 LT |
768 | return; |
769 | } | |
770 | ||
771 | /* | |
772 | * Load the initial SIDs specified in a policy database | |
773 | * structure into a SID table. | |
774 | */ | |
775 | int policydb_load_isids(struct policydb *p, struct sidtab *s) | |
776 | { | |
777 | struct ocontext *head, *c; | |
778 | int rc; | |
779 | ||
780 | rc = sidtab_init(s); | |
781 | if (rc) { | |
454d972c | 782 | printk(KERN_ERR "SELinux: out of memory on SID table init\n"); |
1da177e4 LT |
783 | goto out; |
784 | } | |
785 | ||
786 | head = p->ocontexts[OCON_ISID]; | |
787 | for (c = head; c; c = c->next) { | |
788 | if (!c->context[0].user) { | |
454d972c | 789 | printk(KERN_ERR "SELinux: SID %s was never " |
1da177e4 LT |
790 | "defined.\n", c->u.name); |
791 | rc = -EINVAL; | |
792 | goto out; | |
793 | } | |
794 | if (sidtab_insert(s, c->sid[0], &c->context[0])) { | |
454d972c | 795 | printk(KERN_ERR "SELinux: unable to load initial " |
1da177e4 LT |
796 | "SID %s.\n", c->u.name); |
797 | rc = -EINVAL; | |
798 | goto out; | |
799 | } | |
800 | } | |
801 | out: | |
802 | return rc; | |
803 | } | |
804 | ||
45e5421e SS |
805 | int policydb_class_isvalid(struct policydb *p, unsigned int class) |
806 | { | |
807 | if (!class || class > p->p_classes.nprim) | |
808 | return 0; | |
809 | return 1; | |
810 | } | |
811 | ||
812 | int policydb_role_isvalid(struct policydb *p, unsigned int role) | |
813 | { | |
814 | if (!role || role > p->p_roles.nprim) | |
815 | return 0; | |
816 | return 1; | |
817 | } | |
818 | ||
819 | int policydb_type_isvalid(struct policydb *p, unsigned int type) | |
820 | { | |
821 | if (!type || type > p->p_types.nprim) | |
822 | return 0; | |
823 | return 1; | |
824 | } | |
825 | ||
1da177e4 LT |
826 | /* |
827 | * Return 1 if the fields in the security context | |
828 | * structure `c' are valid. Return 0 otherwise. | |
829 | */ | |
830 | int policydb_context_isvalid(struct policydb *p, struct context *c) | |
831 | { | |
832 | struct role_datum *role; | |
833 | struct user_datum *usrdatum; | |
834 | ||
835 | if (!c->role || c->role > p->p_roles.nprim) | |
836 | return 0; | |
837 | ||
838 | if (!c->user || c->user > p->p_users.nprim) | |
839 | return 0; | |
840 | ||
841 | if (!c->type || c->type > p->p_types.nprim) | |
842 | return 0; | |
843 | ||
844 | if (c->role != OBJECT_R_VAL) { | |
845 | /* | |
846 | * Role must be authorized for the type. | |
847 | */ | |
848 | role = p->role_val_to_struct[c->role - 1]; | |
849 | if (!ebitmap_get_bit(&role->types, | |
850 | c->type - 1)) | |
851 | /* role may not be associated with type */ | |
852 | return 0; | |
853 | ||
854 | /* | |
855 | * User must be authorized for the role. | |
856 | */ | |
857 | usrdatum = p->user_val_to_struct[c->user - 1]; | |
858 | if (!usrdatum) | |
859 | return 0; | |
860 | ||
861 | if (!ebitmap_get_bit(&usrdatum->roles, | |
862 | c->role - 1)) | |
863 | /* user may not be associated with role */ | |
864 | return 0; | |
865 | } | |
866 | ||
867 | if (!mls_context_isvalid(p, c)) | |
868 | return 0; | |
869 | ||
870 | return 1; | |
871 | } | |
872 | ||
873 | /* | |
874 | * Read a MLS range structure from a policydb binary | |
875 | * representation file. | |
876 | */ | |
877 | static int mls_read_range_helper(struct mls_range *r, void *fp) | |
878 | { | |
b5bf6c55 AD |
879 | __le32 buf[2]; |
880 | u32 items; | |
1da177e4 LT |
881 | int rc; |
882 | ||
883 | rc = next_entry(buf, fp, sizeof(u32)); | |
884 | if (rc < 0) | |
885 | goto out; | |
886 | ||
887 | items = le32_to_cpu(buf[0]); | |
888 | if (items > ARRAY_SIZE(buf)) { | |
454d972c | 889 | printk(KERN_ERR "SELinux: mls: range overflow\n"); |
1da177e4 LT |
890 | rc = -EINVAL; |
891 | goto out; | |
892 | } | |
893 | rc = next_entry(buf, fp, sizeof(u32) * items); | |
894 | if (rc < 0) { | |
454d972c | 895 | printk(KERN_ERR "SELinux: mls: truncated range\n"); |
1da177e4 LT |
896 | goto out; |
897 | } | |
898 | r->level[0].sens = le32_to_cpu(buf[0]); | |
899 | if (items > 1) | |
900 | r->level[1].sens = le32_to_cpu(buf[1]); | |
901 | else | |
902 | r->level[1].sens = r->level[0].sens; | |
903 | ||
904 | rc = ebitmap_read(&r->level[0].cat, fp); | |
905 | if (rc) { | |
454d972c | 906 | printk(KERN_ERR "SELinux: mls: error reading low " |
1da177e4 LT |
907 | "categories\n"); |
908 | goto out; | |
909 | } | |
910 | if (items > 1) { | |
911 | rc = ebitmap_read(&r->level[1].cat, fp); | |
912 | if (rc) { | |
454d972c | 913 | printk(KERN_ERR "SELinux: mls: error reading high " |
1da177e4 LT |
914 | "categories\n"); |
915 | goto bad_high; | |
916 | } | |
917 | } else { | |
918 | rc = ebitmap_cpy(&r->level[1].cat, &r->level[0].cat); | |
919 | if (rc) { | |
454d972c | 920 | printk(KERN_ERR "SELinux: mls: out of memory\n"); |
1da177e4 LT |
921 | goto bad_high; |
922 | } | |
923 | } | |
924 | ||
925 | rc = 0; | |
926 | out: | |
927 | return rc; | |
928 | bad_high: | |
929 | ebitmap_destroy(&r->level[0].cat); | |
930 | goto out; | |
931 | } | |
932 | ||
933 | /* | |
934 | * Read and validate a security context structure | |
935 | * from a policydb binary representation file. | |
936 | */ | |
937 | static int context_read_and_validate(struct context *c, | |
938 | struct policydb *p, | |
939 | void *fp) | |
940 | { | |
b5bf6c55 | 941 | __le32 buf[3]; |
1da177e4 LT |
942 | int rc; |
943 | ||
944 | rc = next_entry(buf, fp, sizeof buf); | |
945 | if (rc < 0) { | |
454d972c | 946 | printk(KERN_ERR "SELinux: context truncated\n"); |
1da177e4 LT |
947 | goto out; |
948 | } | |
949 | c->user = le32_to_cpu(buf[0]); | |
950 | c->role = le32_to_cpu(buf[1]); | |
951 | c->type = le32_to_cpu(buf[2]); | |
952 | if (p->policyvers >= POLICYDB_VERSION_MLS) { | |
953 | if (mls_read_range_helper(&c->range, fp)) { | |
454d972c | 954 | printk(KERN_ERR "SELinux: error reading MLS range of " |
1da177e4 LT |
955 | "context\n"); |
956 | rc = -EINVAL; | |
957 | goto out; | |
958 | } | |
959 | } | |
960 | ||
961 | if (!policydb_context_isvalid(p, c)) { | |
454d972c | 962 | printk(KERN_ERR "SELinux: invalid security context\n"); |
1da177e4 LT |
963 | context_destroy(c); |
964 | rc = -EINVAL; | |
965 | } | |
966 | out: | |
967 | return rc; | |
968 | } | |
969 | ||
970 | /* | |
971 | * The following *_read functions are used to | |
972 | * read the symbol data from a policy database | |
973 | * binary representation file. | |
974 | */ | |
975 | ||
976 | static int perm_read(struct policydb *p, struct hashtab *h, void *fp) | |
977 | { | |
978 | char *key = NULL; | |
979 | struct perm_datum *perdatum; | |
980 | int rc; | |
b5bf6c55 AD |
981 | __le32 buf[2]; |
982 | u32 len; | |
1da177e4 | 983 | |
89d155ef | 984 | perdatum = kzalloc(sizeof(*perdatum), GFP_KERNEL); |
1da177e4 LT |
985 | if (!perdatum) { |
986 | rc = -ENOMEM; | |
987 | goto out; | |
988 | } | |
1da177e4 LT |
989 | |
990 | rc = next_entry(buf, fp, sizeof buf); | |
991 | if (rc < 0) | |
992 | goto bad; | |
993 | ||
994 | len = le32_to_cpu(buf[0]); | |
995 | perdatum->value = le32_to_cpu(buf[1]); | |
996 | ||
2ced3dfd | 997 | key = kmalloc(len + 1, GFP_KERNEL); |
1da177e4 LT |
998 | if (!key) { |
999 | rc = -ENOMEM; | |
1000 | goto bad; | |
1001 | } | |
1002 | rc = next_entry(key, fp, len); | |
1003 | if (rc < 0) | |
1004 | goto bad; | |
df4ea865 | 1005 | key[len] = '\0'; |
1da177e4 LT |
1006 | |
1007 | rc = hashtab_insert(h, key, perdatum); | |
1008 | if (rc) | |
1009 | goto bad; | |
1010 | out: | |
1011 | return rc; | |
1012 | bad: | |
1013 | perm_destroy(key, perdatum, NULL); | |
1014 | goto out; | |
1015 | } | |
1016 | ||
1017 | static int common_read(struct policydb *p, struct hashtab *h, void *fp) | |
1018 | { | |
1019 | char *key = NULL; | |
1020 | struct common_datum *comdatum; | |
b5bf6c55 AD |
1021 | __le32 buf[4]; |
1022 | u32 len, nel; | |
1da177e4 LT |
1023 | int i, rc; |
1024 | ||
89d155ef | 1025 | comdatum = kzalloc(sizeof(*comdatum), GFP_KERNEL); |
1da177e4 LT |
1026 | if (!comdatum) { |
1027 | rc = -ENOMEM; | |
1028 | goto out; | |
1029 | } | |
1da177e4 LT |
1030 | |
1031 | rc = next_entry(buf, fp, sizeof buf); | |
1032 | if (rc < 0) | |
1033 | goto bad; | |
1034 | ||
1035 | len = le32_to_cpu(buf[0]); | |
1036 | comdatum->value = le32_to_cpu(buf[1]); | |
1037 | ||
1038 | rc = symtab_init(&comdatum->permissions, PERM_SYMTAB_SIZE); | |
1039 | if (rc) | |
1040 | goto bad; | |
1041 | comdatum->permissions.nprim = le32_to_cpu(buf[2]); | |
1042 | nel = le32_to_cpu(buf[3]); | |
1043 | ||
2ced3dfd | 1044 | key = kmalloc(len + 1, GFP_KERNEL); |
1da177e4 LT |
1045 | if (!key) { |
1046 | rc = -ENOMEM; | |
1047 | goto bad; | |
1048 | } | |
1049 | rc = next_entry(key, fp, len); | |
1050 | if (rc < 0) | |
1051 | goto bad; | |
df4ea865 | 1052 | key[len] = '\0'; |
1da177e4 LT |
1053 | |
1054 | for (i = 0; i < nel; i++) { | |
1055 | rc = perm_read(p, comdatum->permissions.table, fp); | |
1056 | if (rc) | |
1057 | goto bad; | |
1058 | } | |
1059 | ||
1060 | rc = hashtab_insert(h, key, comdatum); | |
1061 | if (rc) | |
1062 | goto bad; | |
1063 | out: | |
1064 | return rc; | |
1065 | bad: | |
1066 | common_destroy(key, comdatum, NULL); | |
1067 | goto out; | |
1068 | } | |
1069 | ||
1070 | static int read_cons_helper(struct constraint_node **nodep, int ncons, | |
2ced3dfd | 1071 | int allowxtarget, void *fp) |
1da177e4 LT |
1072 | { |
1073 | struct constraint_node *c, *lc; | |
1074 | struct constraint_expr *e, *le; | |
b5bf6c55 AD |
1075 | __le32 buf[3]; |
1076 | u32 nexpr; | |
1da177e4 LT |
1077 | int rc, i, j, depth; |
1078 | ||
1079 | lc = NULL; | |
1080 | for (i = 0; i < ncons; i++) { | |
89d155ef | 1081 | c = kzalloc(sizeof(*c), GFP_KERNEL); |
1da177e4 LT |
1082 | if (!c) |
1083 | return -ENOMEM; | |
1da177e4 | 1084 | |
2ced3dfd | 1085 | if (lc) |
1da177e4 | 1086 | lc->next = c; |
2ced3dfd | 1087 | else |
1da177e4 | 1088 | *nodep = c; |
1da177e4 LT |
1089 | |
1090 | rc = next_entry(buf, fp, (sizeof(u32) * 2)); | |
1091 | if (rc < 0) | |
1092 | return rc; | |
1093 | c->permissions = le32_to_cpu(buf[0]); | |
1094 | nexpr = le32_to_cpu(buf[1]); | |
1095 | le = NULL; | |
1096 | depth = -1; | |
1097 | for (j = 0; j < nexpr; j++) { | |
89d155ef | 1098 | e = kzalloc(sizeof(*e), GFP_KERNEL); |
1da177e4 LT |
1099 | if (!e) |
1100 | return -ENOMEM; | |
1da177e4 | 1101 | |
2ced3dfd | 1102 | if (le) |
1da177e4 | 1103 | le->next = e; |
2ced3dfd | 1104 | else |
1da177e4 | 1105 | c->expr = e; |
1da177e4 LT |
1106 | |
1107 | rc = next_entry(buf, fp, (sizeof(u32) * 3)); | |
1108 | if (rc < 0) | |
1109 | return rc; | |
1110 | e->expr_type = le32_to_cpu(buf[0]); | |
1111 | e->attr = le32_to_cpu(buf[1]); | |
1112 | e->op = le32_to_cpu(buf[2]); | |
1113 | ||
1114 | switch (e->expr_type) { | |
1115 | case CEXPR_NOT: | |
1116 | if (depth < 0) | |
1117 | return -EINVAL; | |
1118 | break; | |
1119 | case CEXPR_AND: | |
1120 | case CEXPR_OR: | |
1121 | if (depth < 1) | |
1122 | return -EINVAL; | |
1123 | depth--; | |
1124 | break; | |
1125 | case CEXPR_ATTR: | |
1126 | if (depth == (CEXPR_MAXDEPTH - 1)) | |
1127 | return -EINVAL; | |
1128 | depth++; | |
1129 | break; | |
1130 | case CEXPR_NAMES: | |
1131 | if (!allowxtarget && (e->attr & CEXPR_XTARGET)) | |
1132 | return -EINVAL; | |
1133 | if (depth == (CEXPR_MAXDEPTH - 1)) | |
1134 | return -EINVAL; | |
1135 | depth++; | |
1136 | if (ebitmap_read(&e->names, fp)) | |
1137 | return -EINVAL; | |
1138 | break; | |
1139 | default: | |
1140 | return -EINVAL; | |
1141 | } | |
1142 | le = e; | |
1143 | } | |
1144 | if (depth != 0) | |
1145 | return -EINVAL; | |
1146 | lc = c; | |
1147 | } | |
1148 | ||
1149 | return 0; | |
1150 | } | |
1151 | ||
1152 | static int class_read(struct policydb *p, struct hashtab *h, void *fp) | |
1153 | { | |
1154 | char *key = NULL; | |
1155 | struct class_datum *cladatum; | |
b5bf6c55 AD |
1156 | __le32 buf[6]; |
1157 | u32 len, len2, ncons, nel; | |
1da177e4 LT |
1158 | int i, rc; |
1159 | ||
89d155ef | 1160 | cladatum = kzalloc(sizeof(*cladatum), GFP_KERNEL); |
1da177e4 LT |
1161 | if (!cladatum) { |
1162 | rc = -ENOMEM; | |
1163 | goto out; | |
1164 | } | |
1da177e4 LT |
1165 | |
1166 | rc = next_entry(buf, fp, sizeof(u32)*6); | |
1167 | if (rc < 0) | |
1168 | goto bad; | |
1169 | ||
1170 | len = le32_to_cpu(buf[0]); | |
1171 | len2 = le32_to_cpu(buf[1]); | |
1172 | cladatum->value = le32_to_cpu(buf[2]); | |
1173 | ||
1174 | rc = symtab_init(&cladatum->permissions, PERM_SYMTAB_SIZE); | |
1175 | if (rc) | |
1176 | goto bad; | |
1177 | cladatum->permissions.nprim = le32_to_cpu(buf[3]); | |
1178 | nel = le32_to_cpu(buf[4]); | |
1179 | ||
1180 | ncons = le32_to_cpu(buf[5]); | |
1181 | ||
2ced3dfd | 1182 | key = kmalloc(len + 1, GFP_KERNEL); |
1da177e4 LT |
1183 | if (!key) { |
1184 | rc = -ENOMEM; | |
1185 | goto bad; | |
1186 | } | |
1187 | rc = next_entry(key, fp, len); | |
1188 | if (rc < 0) | |
1189 | goto bad; | |
df4ea865 | 1190 | key[len] = '\0'; |
1da177e4 LT |
1191 | |
1192 | if (len2) { | |
2ced3dfd | 1193 | cladatum->comkey = kmalloc(len2 + 1, GFP_KERNEL); |
1da177e4 LT |
1194 | if (!cladatum->comkey) { |
1195 | rc = -ENOMEM; | |
1196 | goto bad; | |
1197 | } | |
1198 | rc = next_entry(cladatum->comkey, fp, len2); | |
1199 | if (rc < 0) | |
1200 | goto bad; | |
df4ea865 | 1201 | cladatum->comkey[len2] = '\0'; |
1da177e4 LT |
1202 | |
1203 | cladatum->comdatum = hashtab_search(p->p_commons.table, | |
1204 | cladatum->comkey); | |
1205 | if (!cladatum->comdatum) { | |
454d972c | 1206 | printk(KERN_ERR "SELinux: unknown common %s\n", |
1da177e4 LT |
1207 | cladatum->comkey); |
1208 | rc = -EINVAL; | |
1209 | goto bad; | |
1210 | } | |
1211 | } | |
1212 | for (i = 0; i < nel; i++) { | |
1213 | rc = perm_read(p, cladatum->permissions.table, fp); | |
1214 | if (rc) | |
1215 | goto bad; | |
1216 | } | |
1217 | ||
1218 | rc = read_cons_helper(&cladatum->constraints, ncons, 0, fp); | |
1219 | if (rc) | |
1220 | goto bad; | |
1221 | ||
1222 | if (p->policyvers >= POLICYDB_VERSION_VALIDATETRANS) { | |
1223 | /* grab the validatetrans rules */ | |
1224 | rc = next_entry(buf, fp, sizeof(u32)); | |
1225 | if (rc < 0) | |
1226 | goto bad; | |
1227 | ncons = le32_to_cpu(buf[0]); | |
1228 | rc = read_cons_helper(&cladatum->validatetrans, ncons, 1, fp); | |
1229 | if (rc) | |
1230 | goto bad; | |
1231 | } | |
1232 | ||
1233 | rc = hashtab_insert(h, key, cladatum); | |
1234 | if (rc) | |
1235 | goto bad; | |
1236 | ||
1237 | rc = 0; | |
1238 | out: | |
1239 | return rc; | |
1240 | bad: | |
6cbda6b6 | 1241 | cls_destroy(key, cladatum, NULL); |
1da177e4 LT |
1242 | goto out; |
1243 | } | |
1244 | ||
1245 | static int role_read(struct policydb *p, struct hashtab *h, void *fp) | |
1246 | { | |
1247 | char *key = NULL; | |
1248 | struct role_datum *role; | |
d9250dea KK |
1249 | int rc, to_read = 2; |
1250 | __le32 buf[3]; | |
b5bf6c55 | 1251 | u32 len; |
1da177e4 | 1252 | |
89d155ef | 1253 | role = kzalloc(sizeof(*role), GFP_KERNEL); |
1da177e4 LT |
1254 | if (!role) { |
1255 | rc = -ENOMEM; | |
1256 | goto out; | |
1257 | } | |
1da177e4 | 1258 | |
d9250dea KK |
1259 | if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) |
1260 | to_read = 3; | |
1261 | ||
1262 | rc = next_entry(buf, fp, sizeof(buf[0]) * to_read); | |
1da177e4 LT |
1263 | if (rc < 0) |
1264 | goto bad; | |
1265 | ||
1266 | len = le32_to_cpu(buf[0]); | |
1267 | role->value = le32_to_cpu(buf[1]); | |
d9250dea KK |
1268 | if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) |
1269 | role->bounds = le32_to_cpu(buf[2]); | |
1da177e4 | 1270 | |
2ced3dfd | 1271 | key = kmalloc(len + 1, GFP_KERNEL); |
1da177e4 LT |
1272 | if (!key) { |
1273 | rc = -ENOMEM; | |
1274 | goto bad; | |
1275 | } | |
1276 | rc = next_entry(key, fp, len); | |
1277 | if (rc < 0) | |
1278 | goto bad; | |
df4ea865 | 1279 | key[len] = '\0'; |
1da177e4 LT |
1280 | |
1281 | rc = ebitmap_read(&role->dominates, fp); | |
1282 | if (rc) | |
1283 | goto bad; | |
1284 | ||
1285 | rc = ebitmap_read(&role->types, fp); | |
1286 | if (rc) | |
1287 | goto bad; | |
1288 | ||
1289 | if (strcmp(key, OBJECT_R) == 0) { | |
1290 | if (role->value != OBJECT_R_VAL) { | |
744ba35e | 1291 | printk(KERN_ERR "SELinux: Role %s has wrong value %d\n", |
1da177e4 LT |
1292 | OBJECT_R, role->value); |
1293 | rc = -EINVAL; | |
1294 | goto bad; | |
1295 | } | |
1296 | rc = 0; | |
1297 | goto bad; | |
1298 | } | |
1299 | ||
1300 | rc = hashtab_insert(h, key, role); | |
1301 | if (rc) | |
1302 | goto bad; | |
1303 | out: | |
1304 | return rc; | |
1305 | bad: | |
1306 | role_destroy(key, role, NULL); | |
1307 | goto out; | |
1308 | } | |
1309 | ||
1310 | static int type_read(struct policydb *p, struct hashtab *h, void *fp) | |
1311 | { | |
1312 | char *key = NULL; | |
1313 | struct type_datum *typdatum; | |
d9250dea KK |
1314 | int rc, to_read = 3; |
1315 | __le32 buf[4]; | |
b5bf6c55 | 1316 | u32 len; |
1da177e4 | 1317 | |
2ced3dfd | 1318 | typdatum = kzalloc(sizeof(*typdatum), GFP_KERNEL); |
1da177e4 LT |
1319 | if (!typdatum) { |
1320 | rc = -ENOMEM; | |
1321 | return rc; | |
1322 | } | |
1da177e4 | 1323 | |
d9250dea KK |
1324 | if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) |
1325 | to_read = 4; | |
1326 | ||
1327 | rc = next_entry(buf, fp, sizeof(buf[0]) * to_read); | |
1da177e4 LT |
1328 | if (rc < 0) |
1329 | goto bad; | |
1330 | ||
1331 | len = le32_to_cpu(buf[0]); | |
1332 | typdatum->value = le32_to_cpu(buf[1]); | |
d9250dea KK |
1333 | if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) { |
1334 | u32 prop = le32_to_cpu(buf[2]); | |
1335 | ||
1336 | if (prop & TYPEDATUM_PROPERTY_PRIMARY) | |
1337 | typdatum->primary = 1; | |
1338 | if (prop & TYPEDATUM_PROPERTY_ATTRIBUTE) | |
1339 | typdatum->attribute = 1; | |
1340 | ||
1341 | typdatum->bounds = le32_to_cpu(buf[3]); | |
1342 | } else { | |
1343 | typdatum->primary = le32_to_cpu(buf[2]); | |
1344 | } | |
1da177e4 | 1345 | |
2ced3dfd | 1346 | key = kmalloc(len + 1, GFP_KERNEL); |
1da177e4 LT |
1347 | if (!key) { |
1348 | rc = -ENOMEM; | |
1349 | goto bad; | |
1350 | } | |
1351 | rc = next_entry(key, fp, len); | |
1352 | if (rc < 0) | |
1353 | goto bad; | |
df4ea865 | 1354 | key[len] = '\0'; |
1da177e4 LT |
1355 | |
1356 | rc = hashtab_insert(h, key, typdatum); | |
1357 | if (rc) | |
1358 | goto bad; | |
1359 | out: | |
1360 | return rc; | |
1361 | bad: | |
1362 | type_destroy(key, typdatum, NULL); | |
1363 | goto out; | |
1364 | } | |
1365 | ||
1366 | ||
1367 | /* | |
1368 | * Read a MLS level structure from a policydb binary | |
1369 | * representation file. | |
1370 | */ | |
1371 | static int mls_read_level(struct mls_level *lp, void *fp) | |
1372 | { | |
b5bf6c55 | 1373 | __le32 buf[1]; |
1da177e4 LT |
1374 | int rc; |
1375 | ||
1376 | memset(lp, 0, sizeof(*lp)); | |
1377 | ||
1378 | rc = next_entry(buf, fp, sizeof buf); | |
1379 | if (rc < 0) { | |
454d972c | 1380 | printk(KERN_ERR "SELinux: mls: truncated level\n"); |
1da177e4 LT |
1381 | goto bad; |
1382 | } | |
1383 | lp->sens = le32_to_cpu(buf[0]); | |
1384 | ||
1385 | if (ebitmap_read(&lp->cat, fp)) { | |
454d972c | 1386 | printk(KERN_ERR "SELinux: mls: error reading level " |
1da177e4 LT |
1387 | "categories\n"); |
1388 | goto bad; | |
1389 | } | |
45e5421e | 1390 | |
1da177e4 LT |
1391 | return 0; |
1392 | ||
1393 | bad: | |
1394 | return -EINVAL; | |
1395 | } | |
1396 | ||
1397 | static int user_read(struct policydb *p, struct hashtab *h, void *fp) | |
1398 | { | |
1399 | char *key = NULL; | |
1400 | struct user_datum *usrdatum; | |
d9250dea KK |
1401 | int rc, to_read = 2; |
1402 | __le32 buf[3]; | |
b5bf6c55 | 1403 | u32 len; |
1da177e4 | 1404 | |
89d155ef | 1405 | usrdatum = kzalloc(sizeof(*usrdatum), GFP_KERNEL); |
1da177e4 LT |
1406 | if (!usrdatum) { |
1407 | rc = -ENOMEM; | |
1408 | goto out; | |
1409 | } | |
1da177e4 | 1410 | |
d9250dea KK |
1411 | if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) |
1412 | to_read = 3; | |
1413 | ||
1414 | rc = next_entry(buf, fp, sizeof(buf[0]) * to_read); | |
1da177e4 LT |
1415 | if (rc < 0) |
1416 | goto bad; | |
1417 | ||
1418 | len = le32_to_cpu(buf[0]); | |
1419 | usrdatum->value = le32_to_cpu(buf[1]); | |
d9250dea KK |
1420 | if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) |
1421 | usrdatum->bounds = le32_to_cpu(buf[2]); | |
1da177e4 | 1422 | |
2ced3dfd | 1423 | key = kmalloc(len + 1, GFP_KERNEL); |
1da177e4 LT |
1424 | if (!key) { |
1425 | rc = -ENOMEM; | |
1426 | goto bad; | |
1427 | } | |
1428 | rc = next_entry(key, fp, len); | |
1429 | if (rc < 0) | |
1430 | goto bad; | |
df4ea865 | 1431 | key[len] = '\0'; |
1da177e4 LT |
1432 | |
1433 | rc = ebitmap_read(&usrdatum->roles, fp); | |
1434 | if (rc) | |
1435 | goto bad; | |
1436 | ||
1437 | if (p->policyvers >= POLICYDB_VERSION_MLS) { | |
1438 | rc = mls_read_range_helper(&usrdatum->range, fp); | |
1439 | if (rc) | |
1440 | goto bad; | |
1441 | rc = mls_read_level(&usrdatum->dfltlevel, fp); | |
1442 | if (rc) | |
1443 | goto bad; | |
1444 | } | |
1445 | ||
1446 | rc = hashtab_insert(h, key, usrdatum); | |
1447 | if (rc) | |
1448 | goto bad; | |
1449 | out: | |
1450 | return rc; | |
1451 | bad: | |
1452 | user_destroy(key, usrdatum, NULL); | |
1453 | goto out; | |
1454 | } | |
1455 | ||
1456 | static int sens_read(struct policydb *p, struct hashtab *h, void *fp) | |
1457 | { | |
1458 | char *key = NULL; | |
1459 | struct level_datum *levdatum; | |
1460 | int rc; | |
b5bf6c55 AD |
1461 | __le32 buf[2]; |
1462 | u32 len; | |
1da177e4 | 1463 | |
89d155ef | 1464 | levdatum = kzalloc(sizeof(*levdatum), GFP_ATOMIC); |
1da177e4 LT |
1465 | if (!levdatum) { |
1466 | rc = -ENOMEM; | |
1467 | goto out; | |
1468 | } | |
1da177e4 LT |
1469 | |
1470 | rc = next_entry(buf, fp, sizeof buf); | |
1471 | if (rc < 0) | |
1472 | goto bad; | |
1473 | ||
1474 | len = le32_to_cpu(buf[0]); | |
1475 | levdatum->isalias = le32_to_cpu(buf[1]); | |
1476 | ||
2ced3dfd | 1477 | key = kmalloc(len + 1, GFP_ATOMIC); |
1da177e4 LT |
1478 | if (!key) { |
1479 | rc = -ENOMEM; | |
1480 | goto bad; | |
1481 | } | |
1482 | rc = next_entry(key, fp, len); | |
1483 | if (rc < 0) | |
1484 | goto bad; | |
df4ea865 | 1485 | key[len] = '\0'; |
1da177e4 LT |
1486 | |
1487 | levdatum->level = kmalloc(sizeof(struct mls_level), GFP_ATOMIC); | |
1488 | if (!levdatum->level) { | |
1489 | rc = -ENOMEM; | |
1490 | goto bad; | |
1491 | } | |
1492 | if (mls_read_level(levdatum->level, fp)) { | |
1493 | rc = -EINVAL; | |
1494 | goto bad; | |
1495 | } | |
1496 | ||
1497 | rc = hashtab_insert(h, key, levdatum); | |
1498 | if (rc) | |
1499 | goto bad; | |
1500 | out: | |
1501 | return rc; | |
1502 | bad: | |
1503 | sens_destroy(key, levdatum, NULL); | |
1504 | goto out; | |
1505 | } | |
1506 | ||
1507 | static int cat_read(struct policydb *p, struct hashtab *h, void *fp) | |
1508 | { | |
1509 | char *key = NULL; | |
1510 | struct cat_datum *catdatum; | |
1511 | int rc; | |
b5bf6c55 AD |
1512 | __le32 buf[3]; |
1513 | u32 len; | |
1da177e4 | 1514 | |
89d155ef | 1515 | catdatum = kzalloc(sizeof(*catdatum), GFP_ATOMIC); |
1da177e4 LT |
1516 | if (!catdatum) { |
1517 | rc = -ENOMEM; | |
1518 | goto out; | |
1519 | } | |
1da177e4 LT |
1520 | |
1521 | rc = next_entry(buf, fp, sizeof buf); | |
1522 | if (rc < 0) | |
1523 | goto bad; | |
1524 | ||
1525 | len = le32_to_cpu(buf[0]); | |
1526 | catdatum->value = le32_to_cpu(buf[1]); | |
1527 | catdatum->isalias = le32_to_cpu(buf[2]); | |
1528 | ||
2ced3dfd | 1529 | key = kmalloc(len + 1, GFP_ATOMIC); |
1da177e4 LT |
1530 | if (!key) { |
1531 | rc = -ENOMEM; | |
1532 | goto bad; | |
1533 | } | |
1534 | rc = next_entry(key, fp, len); | |
1535 | if (rc < 0) | |
1536 | goto bad; | |
df4ea865 | 1537 | key[len] = '\0'; |
1da177e4 LT |
1538 | |
1539 | rc = hashtab_insert(h, key, catdatum); | |
1540 | if (rc) | |
1541 | goto bad; | |
1542 | out: | |
1543 | return rc; | |
1544 | ||
1545 | bad: | |
1546 | cat_destroy(key, catdatum, NULL); | |
1547 | goto out; | |
1548 | } | |
1549 | ||
1550 | static int (*read_f[SYM_NUM]) (struct policydb *p, struct hashtab *h, void *fp) = | |
1551 | { | |
1552 | common_read, | |
1553 | class_read, | |
1554 | role_read, | |
1555 | type_read, | |
1556 | user_read, | |
1557 | cond_read_bool, | |
1558 | sens_read, | |
1559 | cat_read, | |
1560 | }; | |
1561 | ||
d9250dea KK |
1562 | static int user_bounds_sanity_check(void *key, void *datum, void *datap) |
1563 | { | |
1564 | struct user_datum *upper, *user; | |
1565 | struct policydb *p = datap; | |
1566 | int depth = 0; | |
1567 | ||
1568 | upper = user = datum; | |
1569 | while (upper->bounds) { | |
1570 | struct ebitmap_node *node; | |
1571 | unsigned long bit; | |
1572 | ||
1573 | if (++depth == POLICYDB_BOUNDS_MAXDEPTH) { | |
1574 | printk(KERN_ERR "SELinux: user %s: " | |
1575 | "too deep or looped boundary", | |
1576 | (char *) key); | |
1577 | return -EINVAL; | |
1578 | } | |
1579 | ||
1580 | upper = p->user_val_to_struct[upper->bounds - 1]; | |
1581 | ebitmap_for_each_positive_bit(&user->roles, node, bit) { | |
1582 | if (ebitmap_get_bit(&upper->roles, bit)) | |
1583 | continue; | |
1584 | ||
1585 | printk(KERN_ERR | |
1586 | "SELinux: boundary violated policy: " | |
1587 | "user=%s role=%s bounds=%s\n", | |
1588 | p->p_user_val_to_name[user->value - 1], | |
1589 | p->p_role_val_to_name[bit], | |
1590 | p->p_user_val_to_name[upper->value - 1]); | |
1591 | ||
1592 | return -EINVAL; | |
1593 | } | |
1594 | } | |
1595 | ||
1596 | return 0; | |
1597 | } | |
1598 | ||
1599 | static int role_bounds_sanity_check(void *key, void *datum, void *datap) | |
1600 | { | |
1601 | struct role_datum *upper, *role; | |
1602 | struct policydb *p = datap; | |
1603 | int depth = 0; | |
1604 | ||
1605 | upper = role = datum; | |
1606 | while (upper->bounds) { | |
1607 | struct ebitmap_node *node; | |
1608 | unsigned long bit; | |
1609 | ||
1610 | if (++depth == POLICYDB_BOUNDS_MAXDEPTH) { | |
1611 | printk(KERN_ERR "SELinux: role %s: " | |
1612 | "too deep or looped bounds\n", | |
1613 | (char *) key); | |
1614 | return -EINVAL; | |
1615 | } | |
1616 | ||
1617 | upper = p->role_val_to_struct[upper->bounds - 1]; | |
1618 | ebitmap_for_each_positive_bit(&role->types, node, bit) { | |
1619 | if (ebitmap_get_bit(&upper->types, bit)) | |
1620 | continue; | |
1621 | ||
1622 | printk(KERN_ERR | |
1623 | "SELinux: boundary violated policy: " | |
1624 | "role=%s type=%s bounds=%s\n", | |
1625 | p->p_role_val_to_name[role->value - 1], | |
1626 | p->p_type_val_to_name[bit], | |
1627 | p->p_role_val_to_name[upper->value - 1]); | |
1628 | ||
1629 | return -EINVAL; | |
1630 | } | |
1631 | } | |
1632 | ||
1633 | return 0; | |
1634 | } | |
1635 | ||
1636 | static int type_bounds_sanity_check(void *key, void *datum, void *datap) | |
1637 | { | |
daa6d83a | 1638 | struct type_datum *upper; |
d9250dea KK |
1639 | struct policydb *p = datap; |
1640 | int depth = 0; | |
1641 | ||
daa6d83a | 1642 | upper = datum; |
d9250dea KK |
1643 | while (upper->bounds) { |
1644 | if (++depth == POLICYDB_BOUNDS_MAXDEPTH) { | |
1645 | printk(KERN_ERR "SELinux: type %s: " | |
1646 | "too deep or looped boundary\n", | |
1647 | (char *) key); | |
1648 | return -EINVAL; | |
1649 | } | |
1650 | ||
1651 | upper = p->type_val_to_struct[upper->bounds - 1]; | |
1652 | if (upper->attribute) { | |
1653 | printk(KERN_ERR "SELinux: type %s: " | |
1654 | "bounded by attribute %s", | |
1655 | (char *) key, | |
1656 | p->p_type_val_to_name[upper->value - 1]); | |
1657 | return -EINVAL; | |
1658 | } | |
1659 | } | |
1660 | ||
1661 | return 0; | |
1662 | } | |
1663 | ||
1664 | static int policydb_bounds_sanity_check(struct policydb *p) | |
1665 | { | |
1666 | int rc; | |
1667 | ||
1668 | if (p->policyvers < POLICYDB_VERSION_BOUNDARY) | |
1669 | return 0; | |
1670 | ||
1671 | rc = hashtab_map(p->p_users.table, | |
1672 | user_bounds_sanity_check, p); | |
1673 | if (rc) | |
1674 | return rc; | |
1675 | ||
1676 | rc = hashtab_map(p->p_roles.table, | |
1677 | role_bounds_sanity_check, p); | |
1678 | if (rc) | |
1679 | return rc; | |
1680 | ||
1681 | rc = hashtab_map(p->p_types.table, | |
1682 | type_bounds_sanity_check, p); | |
1683 | if (rc) | |
1684 | return rc; | |
1685 | ||
1686 | return 0; | |
1687 | } | |
1688 | ||
1da177e4 LT |
1689 | extern int ss_initialized; |
1690 | ||
c6d3aaa4 SS |
1691 | u16 string_to_security_class(struct policydb *p, const char *name) |
1692 | { | |
1693 | struct class_datum *cladatum; | |
1694 | ||
1695 | cladatum = hashtab_search(p->p_classes.table, name); | |
1696 | if (!cladatum) | |
1697 | return 0; | |
1698 | ||
1699 | return cladatum->value; | |
1700 | } | |
1701 | ||
1702 | u32 string_to_av_perm(struct policydb *p, u16 tclass, const char *name) | |
1703 | { | |
1704 | struct class_datum *cladatum; | |
1705 | struct perm_datum *perdatum = NULL; | |
1706 | struct common_datum *comdatum; | |
1707 | ||
1708 | if (!tclass || tclass > p->p_classes.nprim) | |
1709 | return 0; | |
1710 | ||
1711 | cladatum = p->class_val_to_struct[tclass-1]; | |
1712 | comdatum = cladatum->comdatum; | |
1713 | if (comdatum) | |
1714 | perdatum = hashtab_search(comdatum->permissions.table, | |
1715 | name); | |
1716 | if (!perdatum) | |
1717 | perdatum = hashtab_search(cladatum->permissions.table, | |
1718 | name); | |
1719 | if (!perdatum) | |
1720 | return 0; | |
1721 | ||
1722 | return 1U << (perdatum->value-1); | |
1723 | } | |
1724 | ||
9ee0c823 EP |
1725 | static int range_read(struct policydb *p, void *fp) |
1726 | { | |
1727 | struct range_trans *rt = NULL; | |
1728 | struct mls_range *r = NULL; | |
1729 | int i, rc; | |
1730 | __le32 buf[2]; | |
1731 | u32 nel; | |
1732 | ||
1733 | if (p->policyvers < POLICYDB_VERSION_MLS) | |
1734 | return 0; | |
1735 | ||
1736 | rc = next_entry(buf, fp, sizeof(u32)); | |
1737 | if (rc) | |
1738 | goto out; | |
1739 | ||
1740 | nel = le32_to_cpu(buf[0]); | |
1741 | for (i = 0; i < nel; i++) { | |
1742 | rc = -ENOMEM; | |
1743 | rt = kzalloc(sizeof(*rt), GFP_KERNEL); | |
1744 | if (!rt) | |
1745 | goto out; | |
1746 | ||
1747 | rc = next_entry(buf, fp, (sizeof(u32) * 2)); | |
1748 | if (rc) | |
1749 | goto out; | |
1750 | ||
1751 | rt->source_type = le32_to_cpu(buf[0]); | |
1752 | rt->target_type = le32_to_cpu(buf[1]); | |
1753 | if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) { | |
1754 | rc = next_entry(buf, fp, sizeof(u32)); | |
1755 | if (rc) | |
1756 | goto out; | |
1757 | rt->target_class = le32_to_cpu(buf[0]); | |
1758 | } else | |
1759 | rt->target_class = p->process_class; | |
1760 | ||
1761 | rc = -EINVAL; | |
1762 | if (!policydb_type_isvalid(p, rt->source_type) || | |
1763 | !policydb_type_isvalid(p, rt->target_type) || | |
1764 | !policydb_class_isvalid(p, rt->target_class)) | |
1765 | goto out; | |
1766 | ||
1767 | rc = -ENOMEM; | |
1768 | r = kzalloc(sizeof(*r), GFP_KERNEL); | |
1769 | if (!r) | |
1770 | goto out; | |
1771 | ||
1772 | rc = mls_read_range_helper(r, fp); | |
1773 | if (rc) | |
1774 | goto out; | |
1775 | ||
1776 | rc = -EINVAL; | |
1777 | if (!mls_range_isvalid(p, r)) { | |
1778 | printk(KERN_WARNING "SELinux: rangetrans: invalid range\n"); | |
1779 | goto out; | |
1780 | } | |
1781 | ||
1782 | rc = hashtab_insert(p->range_tr, rt, r); | |
1783 | if (rc) | |
1784 | goto out; | |
1785 | ||
1786 | rt = NULL; | |
1787 | r = NULL; | |
1788 | } | |
1789 | rangetr_hash_eval(p->range_tr); | |
1790 | rc = 0; | |
1791 | out: | |
1792 | kfree(rt); | |
1793 | kfree(r); | |
1794 | return rc; | |
1795 | } | |
1796 | ||
d1b43547 EP |
1797 | static int genfs_read(struct policydb *p, void *fp) |
1798 | { | |
1799 | int i, j, rc; | |
1800 | u32 nel, nel2, len, len2; | |
1801 | __le32 buf[1]; | |
1802 | struct ocontext *l, *c; | |
1803 | struct ocontext *newc = NULL; | |
1804 | struct genfs *genfs_p, *genfs; | |
1805 | struct genfs *newgenfs = NULL; | |
1806 | ||
1807 | rc = next_entry(buf, fp, sizeof(u32)); | |
1808 | if (rc) | |
1809 | goto out; | |
1810 | nel = le32_to_cpu(buf[0]); | |
1811 | ||
1812 | for (i = 0; i < nel; i++) { | |
1813 | rc = next_entry(buf, fp, sizeof(u32)); | |
1814 | if (rc) | |
1815 | goto out; | |
1816 | len = le32_to_cpu(buf[0]); | |
1817 | ||
1818 | rc = -ENOMEM; | |
1819 | newgenfs = kzalloc(sizeof(*newgenfs), GFP_KERNEL); | |
1820 | if (!newgenfs) | |
1821 | goto out; | |
1822 | ||
1823 | rc = -ENOMEM; | |
1824 | newgenfs->fstype = kmalloc(len + 1, GFP_KERNEL); | |
1825 | if (!newgenfs->fstype) | |
1826 | goto out; | |
1827 | ||
1828 | rc = next_entry(newgenfs->fstype, fp, len); | |
1829 | if (rc) | |
1830 | goto out; | |
1831 | ||
1832 | newgenfs->fstype[len] = 0; | |
1833 | ||
1834 | for (genfs_p = NULL, genfs = p->genfs; genfs; | |
1835 | genfs_p = genfs, genfs = genfs->next) { | |
1836 | rc = -EINVAL; | |
1837 | if (strcmp(newgenfs->fstype, genfs->fstype) == 0) { | |
1838 | printk(KERN_ERR "SELinux: dup genfs fstype %s\n", | |
1839 | newgenfs->fstype); | |
1840 | goto out; | |
1841 | } | |
1842 | if (strcmp(newgenfs->fstype, genfs->fstype) < 0) | |
1843 | break; | |
1844 | } | |
1845 | newgenfs->next = genfs; | |
1846 | if (genfs_p) | |
1847 | genfs_p->next = newgenfs; | |
1848 | else | |
1849 | p->genfs = newgenfs; | |
1850 | genfs = newgenfs; | |
1851 | newgenfs = NULL; | |
1852 | ||
1853 | rc = next_entry(buf, fp, sizeof(u32)); | |
1854 | if (rc) | |
1855 | goto out; | |
1856 | ||
1857 | nel2 = le32_to_cpu(buf[0]); | |
1858 | for (j = 0; j < nel2; j++) { | |
1859 | rc = next_entry(buf, fp, sizeof(u32)); | |
1860 | if (rc) | |
1861 | goto out; | |
1862 | len = le32_to_cpu(buf[0]); | |
1863 | ||
1864 | rc = -ENOMEM; | |
1865 | newc = kzalloc(sizeof(*newc), GFP_KERNEL); | |
1866 | if (!newc) | |
1867 | goto out; | |
1868 | ||
1869 | rc = -ENOMEM; | |
1870 | newc->u.name = kmalloc(len + 1, GFP_KERNEL); | |
1871 | if (!newc->u.name) | |
1872 | goto out; | |
1873 | ||
1874 | rc = next_entry(newc->u.name, fp, len); | |
1875 | if (rc) | |
1876 | goto out; | |
1877 | newc->u.name[len] = 0; | |
1878 | ||
1879 | rc = next_entry(buf, fp, sizeof(u32)); | |
1880 | if (rc) | |
1881 | goto out; | |
1882 | ||
1883 | newc->v.sclass = le32_to_cpu(buf[0]); | |
1884 | rc = context_read_and_validate(&newc->context[0], p, fp); | |
1885 | if (rc) | |
1886 | goto out; | |
1887 | ||
1888 | for (l = NULL, c = genfs->head; c; | |
1889 | l = c, c = c->next) { | |
1890 | rc = -EINVAL; | |
1891 | if (!strcmp(newc->u.name, c->u.name) && | |
1892 | (!c->v.sclass || !newc->v.sclass || | |
1893 | newc->v.sclass == c->v.sclass)) { | |
1894 | printk(KERN_ERR "SELinux: dup genfs entry (%s,%s)\n", | |
1895 | genfs->fstype, c->u.name); | |
1896 | goto out; | |
1897 | } | |
1898 | len = strlen(newc->u.name); | |
1899 | len2 = strlen(c->u.name); | |
1900 | if (len > len2) | |
1901 | break; | |
1902 | } | |
1903 | ||
1904 | newc->next = c; | |
1905 | if (l) | |
1906 | l->next = newc; | |
1907 | else | |
1908 | genfs->head = newc; | |
1909 | newc = NULL; | |
1910 | } | |
1911 | } | |
1912 | rc = 0; | |
1913 | out: | |
1914 | if (newgenfs) | |
1915 | kfree(newgenfs->fstype); | |
1916 | kfree(newgenfs); | |
1917 | ocontext_destroy(newc, OCON_FSUSE); | |
1918 | ||
1919 | return rc; | |
1920 | } | |
1921 | ||
692a8a23 EP |
1922 | static int ocontext_read(struct policydb *p, struct policydb_compat_info *info, |
1923 | void *fp) | |
1924 | { | |
1925 | int i, j, rc; | |
1926 | u32 nel, len; | |
1927 | __le32 buf[3]; | |
1928 | struct ocontext *l, *c; | |
1929 | u32 nodebuf[8]; | |
1930 | ||
1931 | for (i = 0; i < info->ocon_num; i++) { | |
1932 | rc = next_entry(buf, fp, sizeof(u32)); | |
1933 | if (rc) | |
1934 | goto out; | |
1935 | nel = le32_to_cpu(buf[0]); | |
1936 | ||
1937 | l = NULL; | |
1938 | for (j = 0; j < nel; j++) { | |
1939 | rc = -ENOMEM; | |
1940 | c = kzalloc(sizeof(*c), GFP_KERNEL); | |
1941 | if (!c) | |
1942 | goto out; | |
1943 | if (l) | |
1944 | l->next = c; | |
1945 | else | |
1946 | p->ocontexts[i] = c; | |
1947 | l = c; | |
1948 | ||
1949 | switch (i) { | |
1950 | case OCON_ISID: | |
1951 | rc = next_entry(buf, fp, sizeof(u32)); | |
1952 | if (rc) | |
1953 | goto out; | |
1954 | ||
1955 | c->sid[0] = le32_to_cpu(buf[0]); | |
1956 | rc = context_read_and_validate(&c->context[0], p, fp); | |
1957 | if (rc) | |
1958 | goto out; | |
1959 | break; | |
1960 | case OCON_FS: | |
1961 | case OCON_NETIF: | |
1962 | rc = next_entry(buf, fp, sizeof(u32)); | |
1963 | if (rc) | |
1964 | goto out; | |
1965 | len = le32_to_cpu(buf[0]); | |
1966 | ||
1967 | rc = -ENOMEM; | |
1968 | c->u.name = kmalloc(len + 1, GFP_KERNEL); | |
1969 | if (!c->u.name) | |
1970 | goto out; | |
1971 | ||
1972 | rc = next_entry(c->u.name, fp, len); | |
1973 | if (rc) | |
1974 | goto out; | |
1975 | ||
1976 | c->u.name[len] = 0; | |
1977 | rc = context_read_and_validate(&c->context[0], p, fp); | |
1978 | if (rc) | |
1979 | goto out; | |
1980 | rc = context_read_and_validate(&c->context[1], p, fp); | |
1981 | if (rc) | |
1982 | goto out; | |
1983 | break; | |
1984 | case OCON_PORT: | |
1985 | rc = next_entry(buf, fp, sizeof(u32)*3); | |
1986 | if (rc) | |
1987 | goto out; | |
1988 | c->u.port.protocol = le32_to_cpu(buf[0]); | |
1989 | c->u.port.low_port = le32_to_cpu(buf[1]); | |
1990 | c->u.port.high_port = le32_to_cpu(buf[2]); | |
1991 | rc = context_read_and_validate(&c->context[0], p, fp); | |
1992 | if (rc) | |
1993 | goto out; | |
1994 | break; | |
1995 | case OCON_NODE: | |
1996 | rc = next_entry(nodebuf, fp, sizeof(u32) * 2); | |
1997 | if (rc) | |
1998 | goto out; | |
1999 | c->u.node.addr = nodebuf[0]; /* network order */ | |
2000 | c->u.node.mask = nodebuf[1]; /* network order */ | |
2001 | rc = context_read_and_validate(&c->context[0], p, fp); | |
2002 | if (rc) | |
2003 | goto out; | |
2004 | break; | |
2005 | case OCON_FSUSE: | |
2006 | rc = next_entry(buf, fp, sizeof(u32)*2); | |
2007 | if (rc) | |
2008 | goto out; | |
2009 | ||
2010 | rc = -EINVAL; | |
2011 | c->v.behavior = le32_to_cpu(buf[0]); | |
2012 | if (c->v.behavior > SECURITY_FS_USE_NONE) | |
2013 | goto out; | |
2014 | ||
2015 | rc = -ENOMEM; | |
2016 | len = le32_to_cpu(buf[1]); | |
2017 | c->u.name = kmalloc(len + 1, GFP_KERNEL); | |
2018 | if (!c->u.name) | |
2019 | goto out; | |
2020 | ||
2021 | rc = next_entry(c->u.name, fp, len); | |
2022 | if (rc) | |
2023 | goto out; | |
2024 | c->u.name[len] = 0; | |
2025 | rc = context_read_and_validate(&c->context[0], p, fp); | |
2026 | if (rc) | |
2027 | goto out; | |
2028 | break; | |
2029 | case OCON_NODE6: { | |
2030 | int k; | |
2031 | ||
2032 | rc = next_entry(nodebuf, fp, sizeof(u32) * 8); | |
2033 | if (rc) | |
2034 | goto out; | |
2035 | for (k = 0; k < 4; k++) | |
2036 | c->u.node6.addr[k] = nodebuf[k]; | |
2037 | for (k = 0; k < 4; k++) | |
2038 | c->u.node6.mask[k] = nodebuf[k+4]; | |
2039 | rc = context_read_and_validate(&c->context[0], p, fp); | |
2040 | if (rc) | |
2041 | goto out; | |
2042 | break; | |
2043 | } | |
2044 | } | |
2045 | } | |
2046 | } | |
2047 | rc = 0; | |
2048 | out: | |
2049 | return rc; | |
2050 | } | |
2051 | ||
1da177e4 LT |
2052 | /* |
2053 | * Read the configuration data from a policy database binary | |
2054 | * representation file into a policy database structure. | |
2055 | */ | |
2056 | int policydb_read(struct policydb *p, void *fp) | |
2057 | { | |
2058 | struct role_allow *ra, *lra; | |
2059 | struct role_trans *tr, *ltr; | |
1da177e4 | 2060 | int i, j, rc; |
59dbd1ba | 2061 | __le32 buf[4]; |
d1b43547 EP |
2062 | u32 len, nprim, nel; |
2063 | ||
1da177e4 LT |
2064 | char *policydb_str; |
2065 | struct policydb_compat_info *info; | |
1da177e4 | 2066 | |
1da177e4 LT |
2067 | rc = policydb_init(p); |
2068 | if (rc) | |
2069 | goto out; | |
2070 | ||
2071 | /* Read the magic number and string length. */ | |
2ced3dfd | 2072 | rc = next_entry(buf, fp, sizeof(u32) * 2); |
1da177e4 LT |
2073 | if (rc < 0) |
2074 | goto bad; | |
2075 | ||
b5bf6c55 | 2076 | if (le32_to_cpu(buf[0]) != POLICYDB_MAGIC) { |
454d972c | 2077 | printk(KERN_ERR "SELinux: policydb magic number 0x%x does " |
1da177e4 | 2078 | "not match expected magic number 0x%x\n", |
b5bf6c55 | 2079 | le32_to_cpu(buf[0]), POLICYDB_MAGIC); |
1da177e4 LT |
2080 | goto bad; |
2081 | } | |
2082 | ||
b5bf6c55 | 2083 | len = le32_to_cpu(buf[1]); |
1da177e4 | 2084 | if (len != strlen(POLICYDB_STRING)) { |
454d972c | 2085 | printk(KERN_ERR "SELinux: policydb string length %d does not " |
1da177e4 LT |
2086 | "match expected length %Zu\n", |
2087 | len, strlen(POLICYDB_STRING)); | |
2088 | goto bad; | |
2089 | } | |
2ced3dfd | 2090 | policydb_str = kmalloc(len + 1, GFP_KERNEL); |
1da177e4 | 2091 | if (!policydb_str) { |
454d972c | 2092 | printk(KERN_ERR "SELinux: unable to allocate memory for policydb " |
1da177e4 LT |
2093 | "string of length %d\n", len); |
2094 | rc = -ENOMEM; | |
2095 | goto bad; | |
2096 | } | |
2097 | rc = next_entry(policydb_str, fp, len); | |
2098 | if (rc < 0) { | |
454d972c | 2099 | printk(KERN_ERR "SELinux: truncated policydb string identifier\n"); |
1da177e4 LT |
2100 | kfree(policydb_str); |
2101 | goto bad; | |
2102 | } | |
df4ea865 | 2103 | policydb_str[len] = '\0'; |
1da177e4 | 2104 | if (strcmp(policydb_str, POLICYDB_STRING)) { |
454d972c | 2105 | printk(KERN_ERR "SELinux: policydb string %s does not match " |
1da177e4 LT |
2106 | "my string %s\n", policydb_str, POLICYDB_STRING); |
2107 | kfree(policydb_str); | |
2108 | goto bad; | |
2109 | } | |
2110 | /* Done with policydb_str. */ | |
2111 | kfree(policydb_str); | |
2112 | policydb_str = NULL; | |
2113 | ||
0719aaf5 | 2114 | /* Read the version and table sizes. */ |
1da177e4 LT |
2115 | rc = next_entry(buf, fp, sizeof(u32)*4); |
2116 | if (rc < 0) | |
2117 | goto bad; | |
1da177e4 | 2118 | |
b5bf6c55 | 2119 | p->policyvers = le32_to_cpu(buf[0]); |
1da177e4 LT |
2120 | if (p->policyvers < POLICYDB_VERSION_MIN || |
2121 | p->policyvers > POLICYDB_VERSION_MAX) { | |
454d972c | 2122 | printk(KERN_ERR "SELinux: policydb version %d does not match " |
2ced3dfd EP |
2123 | "my version range %d-%d\n", |
2124 | le32_to_cpu(buf[0]), POLICYDB_VERSION_MIN, POLICYDB_VERSION_MAX); | |
2125 | goto bad; | |
1da177e4 LT |
2126 | } |
2127 | ||
b5bf6c55 | 2128 | if ((le32_to_cpu(buf[1]) & POLICYDB_CONFIG_MLS)) { |
0719aaf5 | 2129 | p->mls_enabled = 1; |
1da177e4 LT |
2130 | |
2131 | if (p->policyvers < POLICYDB_VERSION_MLS) { | |
744ba35e EP |
2132 | printk(KERN_ERR "SELinux: security policydb version %d " |
2133 | "(MLS) not backwards compatible\n", | |
2134 | p->policyvers); | |
1da177e4 LT |
2135 | goto bad; |
2136 | } | |
1da177e4 | 2137 | } |
3f12070e EP |
2138 | p->reject_unknown = !!(le32_to_cpu(buf[1]) & REJECT_UNKNOWN); |
2139 | p->allow_unknown = !!(le32_to_cpu(buf[1]) & ALLOW_UNKNOWN); | |
1da177e4 | 2140 | |
3bb56b25 PM |
2141 | if (p->policyvers >= POLICYDB_VERSION_POLCAP && |
2142 | ebitmap_read(&p->policycaps, fp) != 0) | |
2143 | goto bad; | |
2144 | ||
64dbf074 EP |
2145 | if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE && |
2146 | ebitmap_read(&p->permissive_map, fp) != 0) | |
2147 | goto bad; | |
2148 | ||
1da177e4 LT |
2149 | info = policydb_lookup_compat(p->policyvers); |
2150 | if (!info) { | |
454d972c | 2151 | printk(KERN_ERR "SELinux: unable to find policy compat info " |
1da177e4 LT |
2152 | "for version %d\n", p->policyvers); |
2153 | goto bad; | |
2154 | } | |
2155 | ||
b5bf6c55 AD |
2156 | if (le32_to_cpu(buf[2]) != info->sym_num || |
2157 | le32_to_cpu(buf[3]) != info->ocon_num) { | |
454d972c | 2158 | printk(KERN_ERR "SELinux: policydb table sizes (%d,%d) do " |
b5bf6c55 AD |
2159 | "not match mine (%d,%d)\n", le32_to_cpu(buf[2]), |
2160 | le32_to_cpu(buf[3]), | |
1da177e4 LT |
2161 | info->sym_num, info->ocon_num); |
2162 | goto bad; | |
2163 | } | |
2164 | ||
2165 | for (i = 0; i < info->sym_num; i++) { | |
2166 | rc = next_entry(buf, fp, sizeof(u32)*2); | |
2167 | if (rc < 0) | |
2168 | goto bad; | |
2169 | nprim = le32_to_cpu(buf[0]); | |
2170 | nel = le32_to_cpu(buf[1]); | |
2171 | for (j = 0; j < nel; j++) { | |
2172 | rc = read_f[i](p, p->symtab[i].table, fp); | |
2173 | if (rc) | |
2174 | goto bad; | |
2175 | } | |
2176 | ||
2177 | p->symtab[i].nprim = nprim; | |
2178 | } | |
2179 | ||
45e5421e | 2180 | rc = avtab_read(&p->te_avtab, fp, p); |
1da177e4 LT |
2181 | if (rc) |
2182 | goto bad; | |
2183 | ||
2184 | if (p->policyvers >= POLICYDB_VERSION_BOOL) { | |
2185 | rc = cond_read_list(p, fp); | |
2186 | if (rc) | |
2187 | goto bad; | |
2188 | } | |
2189 | ||
2190 | rc = next_entry(buf, fp, sizeof(u32)); | |
2191 | if (rc < 0) | |
2192 | goto bad; | |
2193 | nel = le32_to_cpu(buf[0]); | |
2194 | ltr = NULL; | |
2195 | for (i = 0; i < nel; i++) { | |
89d155ef | 2196 | tr = kzalloc(sizeof(*tr), GFP_KERNEL); |
1da177e4 LT |
2197 | if (!tr) { |
2198 | rc = -ENOMEM; | |
2199 | goto bad; | |
2200 | } | |
2ced3dfd | 2201 | if (ltr) |
1da177e4 | 2202 | ltr->next = tr; |
2ced3dfd | 2203 | else |
1da177e4 | 2204 | p->role_tr = tr; |
1da177e4 LT |
2205 | rc = next_entry(buf, fp, sizeof(u32)*3); |
2206 | if (rc < 0) | |
2207 | goto bad; | |
2208 | tr->role = le32_to_cpu(buf[0]); | |
2209 | tr->type = le32_to_cpu(buf[1]); | |
2210 | tr->new_role = le32_to_cpu(buf[2]); | |
45e5421e SS |
2211 | if (!policydb_role_isvalid(p, tr->role) || |
2212 | !policydb_type_isvalid(p, tr->type) || | |
2213 | !policydb_role_isvalid(p, tr->new_role)) { | |
2214 | rc = -EINVAL; | |
2215 | goto bad; | |
2216 | } | |
1da177e4 LT |
2217 | ltr = tr; |
2218 | } | |
2219 | ||
2220 | rc = next_entry(buf, fp, sizeof(u32)); | |
2221 | if (rc < 0) | |
2222 | goto bad; | |
2223 | nel = le32_to_cpu(buf[0]); | |
2224 | lra = NULL; | |
2225 | for (i = 0; i < nel; i++) { | |
89d155ef | 2226 | ra = kzalloc(sizeof(*ra), GFP_KERNEL); |
1da177e4 LT |
2227 | if (!ra) { |
2228 | rc = -ENOMEM; | |
2229 | goto bad; | |
2230 | } | |
2ced3dfd | 2231 | if (lra) |
1da177e4 | 2232 | lra->next = ra; |
2ced3dfd | 2233 | else |
1da177e4 | 2234 | p->role_allow = ra; |
1da177e4 LT |
2235 | rc = next_entry(buf, fp, sizeof(u32)*2); |
2236 | if (rc < 0) | |
2237 | goto bad; | |
2238 | ra->role = le32_to_cpu(buf[0]); | |
2239 | ra->new_role = le32_to_cpu(buf[1]); | |
45e5421e SS |
2240 | if (!policydb_role_isvalid(p, ra->role) || |
2241 | !policydb_role_isvalid(p, ra->new_role)) { | |
2242 | rc = -EINVAL; | |
2243 | goto bad; | |
2244 | } | |
1da177e4 LT |
2245 | lra = ra; |
2246 | } | |
2247 | ||
2248 | rc = policydb_index_classes(p); | |
2249 | if (rc) | |
2250 | goto bad; | |
2251 | ||
2252 | rc = policydb_index_others(p); | |
2253 | if (rc) | |
2254 | goto bad; | |
2255 | ||
c6d3aaa4 SS |
2256 | p->process_class = string_to_security_class(p, "process"); |
2257 | if (!p->process_class) | |
2258 | goto bad; | |
2259 | p->process_trans_perms = string_to_av_perm(p, p->process_class, | |
2260 | "transition"); | |
2261 | p->process_trans_perms |= string_to_av_perm(p, p->process_class, | |
2262 | "dyntransition"); | |
2263 | if (!p->process_trans_perms) | |
2264 | goto bad; | |
2265 | ||
692a8a23 EP |
2266 | rc = ocontext_read(p, info, fp); |
2267 | if (rc) | |
2268 | goto bad; | |
1da177e4 | 2269 | |
d1b43547 EP |
2270 | rc = genfs_read(p, fp); |
2271 | if (rc) | |
1da177e4 | 2272 | goto bad; |
1da177e4 | 2273 | |
9ee0c823 EP |
2274 | rc = range_read(p, fp); |
2275 | if (rc) | |
2276 | goto bad; | |
1da177e4 | 2277 | |
6371dcd3 EP |
2278 | rc = -ENOMEM; |
2279 | p->type_attr_map_array = flex_array_alloc(sizeof(struct ebitmap), | |
2280 | p->p_types.nprim, | |
2281 | GFP_KERNEL | __GFP_ZERO); | |
2282 | if (!p->type_attr_map_array) | |
2283 | goto bad; | |
2284 | ||
2285 | /* preallocate so we don't have to worry about the put ever failing */ | |
2286 | rc = flex_array_prealloc(p->type_attr_map_array, 0, p->p_types.nprim - 1, | |
2287 | GFP_KERNEL | __GFP_ZERO); | |
2288 | if (rc) | |
782ebb99 SS |
2289 | goto bad; |
2290 | ||
2291 | for (i = 0; i < p->p_types.nprim; i++) { | |
6371dcd3 EP |
2292 | struct ebitmap *e = flex_array_get(p->type_attr_map_array, i); |
2293 | ||
2294 | BUG_ON(!e); | |
2295 | ebitmap_init(e); | |
782ebb99 | 2296 | if (p->policyvers >= POLICYDB_VERSION_AVTAB) { |
6371dcd3 EP |
2297 | rc = ebitmap_read(e, fp); |
2298 | if (rc) | |
782ebb99 SS |
2299 | goto bad; |
2300 | } | |
2301 | /* add the type itself as the degenerate case */ | |
6371dcd3 EP |
2302 | rc = ebitmap_set_bit(e, i, 1); |
2303 | if (rc) | |
2304 | goto bad; | |
782ebb99 SS |
2305 | } |
2306 | ||
d9250dea KK |
2307 | rc = policydb_bounds_sanity_check(p); |
2308 | if (rc) | |
2309 | goto bad; | |
2310 | ||
1da177e4 LT |
2311 | rc = 0; |
2312 | out: | |
2313 | return rc; | |
1da177e4 LT |
2314 | bad: |
2315 | if (!rc) | |
2316 | rc = -EINVAL; | |
2317 | policydb_destroy(p); | |
2318 | goto out; | |
2319 | } | |
cee74f47 EP |
2320 | |
2321 | /* | |
2322 | * Write a MLS level structure to a policydb binary | |
2323 | * representation file. | |
2324 | */ | |
2325 | static int mls_write_level(struct mls_level *l, void *fp) | |
2326 | { | |
2327 | __le32 buf[1]; | |
2328 | int rc; | |
2329 | ||
2330 | buf[0] = cpu_to_le32(l->sens); | |
2331 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
2332 | if (rc) | |
2333 | return rc; | |
2334 | ||
2335 | rc = ebitmap_write(&l->cat, fp); | |
2336 | if (rc) | |
2337 | return rc; | |
2338 | ||
2339 | return 0; | |
2340 | } | |
2341 | ||
2342 | /* | |
2343 | * Write a MLS range structure to a policydb binary | |
2344 | * representation file. | |
2345 | */ | |
2346 | static int mls_write_range_helper(struct mls_range *r, void *fp) | |
2347 | { | |
2348 | __le32 buf[3]; | |
2349 | size_t items; | |
2350 | int rc, eq; | |
2351 | ||
2352 | eq = mls_level_eq(&r->level[1], &r->level[0]); | |
2353 | ||
2354 | if (eq) | |
2355 | items = 2; | |
2356 | else | |
2357 | items = 3; | |
2358 | buf[0] = cpu_to_le32(items-1); | |
2359 | buf[1] = cpu_to_le32(r->level[0].sens); | |
2360 | if (!eq) | |
2361 | buf[2] = cpu_to_le32(r->level[1].sens); | |
2362 | ||
2363 | BUG_ON(items > (sizeof(buf)/sizeof(buf[0]))); | |
2364 | ||
2365 | rc = put_entry(buf, sizeof(u32), items, fp); | |
2366 | if (rc) | |
2367 | return rc; | |
2368 | ||
2369 | rc = ebitmap_write(&r->level[0].cat, fp); | |
2370 | if (rc) | |
2371 | return rc; | |
2372 | if (!eq) { | |
2373 | rc = ebitmap_write(&r->level[1].cat, fp); | |
2374 | if (rc) | |
2375 | return rc; | |
2376 | } | |
2377 | ||
2378 | return 0; | |
2379 | } | |
2380 | ||
2381 | static int sens_write(void *vkey, void *datum, void *ptr) | |
2382 | { | |
2383 | char *key = vkey; | |
2384 | struct level_datum *levdatum = datum; | |
2385 | struct policy_data *pd = ptr; | |
2386 | void *fp = pd->fp; | |
2387 | __le32 buf[2]; | |
2388 | size_t len; | |
2389 | int rc; | |
2390 | ||
2391 | len = strlen(key); | |
2392 | buf[0] = cpu_to_le32(len); | |
2393 | buf[1] = cpu_to_le32(levdatum->isalias); | |
2394 | rc = put_entry(buf, sizeof(u32), 2, fp); | |
2395 | if (rc) | |
2396 | return rc; | |
2397 | ||
2398 | rc = put_entry(key, 1, len, fp); | |
2399 | if (rc) | |
2400 | return rc; | |
2401 | ||
2402 | rc = mls_write_level(levdatum->level, fp); | |
2403 | if (rc) | |
2404 | return rc; | |
2405 | ||
2406 | return 0; | |
2407 | } | |
2408 | ||
2409 | static int cat_write(void *vkey, void *datum, void *ptr) | |
2410 | { | |
2411 | char *key = vkey; | |
2412 | struct cat_datum *catdatum = datum; | |
2413 | struct policy_data *pd = ptr; | |
2414 | void *fp = pd->fp; | |
2415 | __le32 buf[3]; | |
2416 | size_t len; | |
2417 | int rc; | |
2418 | ||
2419 | len = strlen(key); | |
2420 | buf[0] = cpu_to_le32(len); | |
2421 | buf[1] = cpu_to_le32(catdatum->value); | |
2422 | buf[2] = cpu_to_le32(catdatum->isalias); | |
2423 | rc = put_entry(buf, sizeof(u32), 3, fp); | |
2424 | if (rc) | |
2425 | return rc; | |
2426 | ||
2427 | rc = put_entry(key, 1, len, fp); | |
2428 | if (rc) | |
2429 | return rc; | |
2430 | ||
2431 | return 0; | |
2432 | } | |
2433 | ||
2434 | static int role_trans_write(struct role_trans *r, void *fp) | |
2435 | { | |
2436 | struct role_trans *tr; | |
2437 | u32 buf[3]; | |
2438 | size_t nel; | |
2439 | int rc; | |
2440 | ||
2441 | nel = 0; | |
2442 | for (tr = r; tr; tr = tr->next) | |
2443 | nel++; | |
2444 | buf[0] = cpu_to_le32(nel); | |
2445 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
2446 | if (rc) | |
2447 | return rc; | |
2448 | for (tr = r; tr; tr = tr->next) { | |
2449 | buf[0] = cpu_to_le32(tr->role); | |
2450 | buf[1] = cpu_to_le32(tr->type); | |
2451 | buf[2] = cpu_to_le32(tr->new_role); | |
2452 | rc = put_entry(buf, sizeof(u32), 3, fp); | |
2453 | if (rc) | |
2454 | return rc; | |
2455 | } | |
2456 | ||
2457 | return 0; | |
2458 | } | |
2459 | ||
2460 | static int role_allow_write(struct role_allow *r, void *fp) | |
2461 | { | |
2462 | struct role_allow *ra; | |
2463 | u32 buf[2]; | |
2464 | size_t nel; | |
2465 | int rc; | |
2466 | ||
2467 | nel = 0; | |
2468 | for (ra = r; ra; ra = ra->next) | |
2469 | nel++; | |
2470 | buf[0] = cpu_to_le32(nel); | |
2471 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
2472 | if (rc) | |
2473 | return rc; | |
2474 | for (ra = r; ra; ra = ra->next) { | |
2475 | buf[0] = cpu_to_le32(ra->role); | |
2476 | buf[1] = cpu_to_le32(ra->new_role); | |
2477 | rc = put_entry(buf, sizeof(u32), 2, fp); | |
2478 | if (rc) | |
2479 | return rc; | |
2480 | } | |
2481 | return 0; | |
2482 | } | |
2483 | ||
2484 | /* | |
2485 | * Write a security context structure | |
2486 | * to a policydb binary representation file. | |
2487 | */ | |
2488 | static int context_write(struct policydb *p, struct context *c, | |
2489 | void *fp) | |
2490 | { | |
2491 | int rc; | |
2492 | __le32 buf[3]; | |
2493 | ||
2494 | buf[0] = cpu_to_le32(c->user); | |
2495 | buf[1] = cpu_to_le32(c->role); | |
2496 | buf[2] = cpu_to_le32(c->type); | |
2497 | ||
2498 | rc = put_entry(buf, sizeof(u32), 3, fp); | |
2499 | if (rc) | |
2500 | return rc; | |
2501 | ||
2502 | rc = mls_write_range_helper(&c->range, fp); | |
2503 | if (rc) | |
2504 | return rc; | |
2505 | ||
2506 | return 0; | |
2507 | } | |
2508 | ||
2509 | /* | |
2510 | * The following *_write functions are used to | |
2511 | * write the symbol data to a policy database | |
2512 | * binary representation file. | |
2513 | */ | |
2514 | ||
2515 | static int perm_write(void *vkey, void *datum, void *fp) | |
2516 | { | |
2517 | char *key = vkey; | |
2518 | struct perm_datum *perdatum = datum; | |
2519 | __le32 buf[2]; | |
2520 | size_t len; | |
2521 | int rc; | |
2522 | ||
2523 | len = strlen(key); | |
2524 | buf[0] = cpu_to_le32(len); | |
2525 | buf[1] = cpu_to_le32(perdatum->value); | |
2526 | rc = put_entry(buf, sizeof(u32), 2, fp); | |
2527 | if (rc) | |
2528 | return rc; | |
2529 | ||
2530 | rc = put_entry(key, 1, len, fp); | |
2531 | if (rc) | |
2532 | return rc; | |
2533 | ||
2534 | return 0; | |
2535 | } | |
2536 | ||
2537 | static int common_write(void *vkey, void *datum, void *ptr) | |
2538 | { | |
2539 | char *key = vkey; | |
2540 | struct common_datum *comdatum = datum; | |
2541 | struct policy_data *pd = ptr; | |
2542 | void *fp = pd->fp; | |
2543 | __le32 buf[4]; | |
2544 | size_t len; | |
2545 | int rc; | |
2546 | ||
2547 | len = strlen(key); | |
2548 | buf[0] = cpu_to_le32(len); | |
2549 | buf[1] = cpu_to_le32(comdatum->value); | |
2550 | buf[2] = cpu_to_le32(comdatum->permissions.nprim); | |
2551 | buf[3] = cpu_to_le32(comdatum->permissions.table->nel); | |
2552 | rc = put_entry(buf, sizeof(u32), 4, fp); | |
2553 | if (rc) | |
2554 | return rc; | |
2555 | ||
2556 | rc = put_entry(key, 1, len, fp); | |
2557 | if (rc) | |
2558 | return rc; | |
2559 | ||
2560 | rc = hashtab_map(comdatum->permissions.table, perm_write, fp); | |
2561 | if (rc) | |
2562 | return rc; | |
2563 | ||
2564 | return 0; | |
2565 | } | |
2566 | ||
2567 | static int write_cons_helper(struct policydb *p, struct constraint_node *node, | |
2568 | void *fp) | |
2569 | { | |
2570 | struct constraint_node *c; | |
2571 | struct constraint_expr *e; | |
2572 | __le32 buf[3]; | |
2573 | u32 nel; | |
2574 | int rc; | |
2575 | ||
2576 | for (c = node; c; c = c->next) { | |
2577 | nel = 0; | |
2578 | for (e = c->expr; e; e = e->next) | |
2579 | nel++; | |
2580 | buf[0] = cpu_to_le32(c->permissions); | |
2581 | buf[1] = cpu_to_le32(nel); | |
2582 | rc = put_entry(buf, sizeof(u32), 2, fp); | |
2583 | if (rc) | |
2584 | return rc; | |
2585 | for (e = c->expr; e; e = e->next) { | |
2586 | buf[0] = cpu_to_le32(e->expr_type); | |
2587 | buf[1] = cpu_to_le32(e->attr); | |
2588 | buf[2] = cpu_to_le32(e->op); | |
2589 | rc = put_entry(buf, sizeof(u32), 3, fp); | |
2590 | if (rc) | |
2591 | return rc; | |
2592 | ||
2593 | switch (e->expr_type) { | |
2594 | case CEXPR_NAMES: | |
2595 | rc = ebitmap_write(&e->names, fp); | |
2596 | if (rc) | |
2597 | return rc; | |
2598 | break; | |
2599 | default: | |
2600 | break; | |
2601 | } | |
2602 | } | |
2603 | } | |
2604 | ||
2605 | return 0; | |
2606 | } | |
2607 | ||
2608 | static int class_write(void *vkey, void *datum, void *ptr) | |
2609 | { | |
2610 | char *key = vkey; | |
2611 | struct class_datum *cladatum = datum; | |
2612 | struct policy_data *pd = ptr; | |
2613 | void *fp = pd->fp; | |
2614 | struct policydb *p = pd->p; | |
2615 | struct constraint_node *c; | |
2616 | __le32 buf[6]; | |
2617 | u32 ncons; | |
2618 | size_t len, len2; | |
2619 | int rc; | |
2620 | ||
2621 | len = strlen(key); | |
2622 | if (cladatum->comkey) | |
2623 | len2 = strlen(cladatum->comkey); | |
2624 | else | |
2625 | len2 = 0; | |
2626 | ||
2627 | ncons = 0; | |
2628 | for (c = cladatum->constraints; c; c = c->next) | |
2629 | ncons++; | |
2630 | ||
2631 | buf[0] = cpu_to_le32(len); | |
2632 | buf[1] = cpu_to_le32(len2); | |
2633 | buf[2] = cpu_to_le32(cladatum->value); | |
2634 | buf[3] = cpu_to_le32(cladatum->permissions.nprim); | |
2635 | if (cladatum->permissions.table) | |
2636 | buf[4] = cpu_to_le32(cladatum->permissions.table->nel); | |
2637 | else | |
2638 | buf[4] = 0; | |
2639 | buf[5] = cpu_to_le32(ncons); | |
2640 | rc = put_entry(buf, sizeof(u32), 6, fp); | |
2641 | if (rc) | |
2642 | return rc; | |
2643 | ||
2644 | rc = put_entry(key, 1, len, fp); | |
2645 | if (rc) | |
2646 | return rc; | |
2647 | ||
2648 | if (cladatum->comkey) { | |
2649 | rc = put_entry(cladatum->comkey, 1, len2, fp); | |
2650 | if (rc) | |
2651 | return rc; | |
2652 | } | |
2653 | ||
2654 | rc = hashtab_map(cladatum->permissions.table, perm_write, fp); | |
2655 | if (rc) | |
2656 | return rc; | |
2657 | ||
2658 | rc = write_cons_helper(p, cladatum->constraints, fp); | |
2659 | if (rc) | |
2660 | return rc; | |
2661 | ||
2662 | /* write out the validatetrans rule */ | |
2663 | ncons = 0; | |
2664 | for (c = cladatum->validatetrans; c; c = c->next) | |
2665 | ncons++; | |
2666 | ||
2667 | buf[0] = cpu_to_le32(ncons); | |
2668 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
2669 | if (rc) | |
2670 | return rc; | |
2671 | ||
2672 | rc = write_cons_helper(p, cladatum->validatetrans, fp); | |
2673 | if (rc) | |
2674 | return rc; | |
2675 | ||
2676 | return 0; | |
2677 | } | |
2678 | ||
2679 | static int role_write(void *vkey, void *datum, void *ptr) | |
2680 | { | |
2681 | char *key = vkey; | |
2682 | struct role_datum *role = datum; | |
2683 | struct policy_data *pd = ptr; | |
2684 | void *fp = pd->fp; | |
2685 | struct policydb *p = pd->p; | |
2686 | __le32 buf[3]; | |
2687 | size_t items, len; | |
2688 | int rc; | |
2689 | ||
2690 | len = strlen(key); | |
2691 | items = 0; | |
2692 | buf[items++] = cpu_to_le32(len); | |
2693 | buf[items++] = cpu_to_le32(role->value); | |
2694 | if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) | |
2695 | buf[items++] = cpu_to_le32(role->bounds); | |
2696 | ||
2697 | BUG_ON(items > (sizeof(buf)/sizeof(buf[0]))); | |
2698 | ||
2699 | rc = put_entry(buf, sizeof(u32), items, fp); | |
2700 | if (rc) | |
2701 | return rc; | |
2702 | ||
2703 | rc = put_entry(key, 1, len, fp); | |
2704 | if (rc) | |
2705 | return rc; | |
2706 | ||
2707 | rc = ebitmap_write(&role->dominates, fp); | |
2708 | if (rc) | |
2709 | return rc; | |
2710 | ||
2711 | rc = ebitmap_write(&role->types, fp); | |
2712 | if (rc) | |
2713 | return rc; | |
2714 | ||
2715 | return 0; | |
2716 | } | |
2717 | ||
2718 | static int type_write(void *vkey, void *datum, void *ptr) | |
2719 | { | |
2720 | char *key = vkey; | |
2721 | struct type_datum *typdatum = datum; | |
2722 | struct policy_data *pd = ptr; | |
2723 | struct policydb *p = pd->p; | |
2724 | void *fp = pd->fp; | |
2725 | __le32 buf[4]; | |
2726 | int rc; | |
2727 | size_t items, len; | |
2728 | ||
2729 | len = strlen(key); | |
2730 | items = 0; | |
2731 | buf[items++] = cpu_to_le32(len); | |
2732 | buf[items++] = cpu_to_le32(typdatum->value); | |
2733 | if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) { | |
2734 | u32 properties = 0; | |
2735 | ||
2736 | if (typdatum->primary) | |
2737 | properties |= TYPEDATUM_PROPERTY_PRIMARY; | |
2738 | ||
2739 | if (typdatum->attribute) | |
2740 | properties |= TYPEDATUM_PROPERTY_ATTRIBUTE; | |
2741 | ||
2742 | buf[items++] = cpu_to_le32(properties); | |
2743 | buf[items++] = cpu_to_le32(typdatum->bounds); | |
2744 | } else { | |
2745 | buf[items++] = cpu_to_le32(typdatum->primary); | |
2746 | } | |
2747 | BUG_ON(items > (sizeof(buf) / sizeof(buf[0]))); | |
2748 | rc = put_entry(buf, sizeof(u32), items, fp); | |
2749 | if (rc) | |
2750 | return rc; | |
2751 | ||
2752 | rc = put_entry(key, 1, len, fp); | |
2753 | if (rc) | |
2754 | return rc; | |
2755 | ||
2756 | return 0; | |
2757 | } | |
2758 | ||
2759 | static int user_write(void *vkey, void *datum, void *ptr) | |
2760 | { | |
2761 | char *key = vkey; | |
2762 | struct user_datum *usrdatum = datum; | |
2763 | struct policy_data *pd = ptr; | |
2764 | struct policydb *p = pd->p; | |
2765 | void *fp = pd->fp; | |
2766 | __le32 buf[3]; | |
2767 | size_t items, len; | |
2768 | int rc; | |
2769 | ||
2770 | len = strlen(key); | |
2771 | items = 0; | |
2772 | buf[items++] = cpu_to_le32(len); | |
2773 | buf[items++] = cpu_to_le32(usrdatum->value); | |
2774 | if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) | |
2775 | buf[items++] = cpu_to_le32(usrdatum->bounds); | |
2776 | BUG_ON(items > (sizeof(buf) / sizeof(buf[0]))); | |
2777 | rc = put_entry(buf, sizeof(u32), items, fp); | |
2778 | if (rc) | |
2779 | return rc; | |
2780 | ||
2781 | rc = put_entry(key, 1, len, fp); | |
2782 | if (rc) | |
2783 | return rc; | |
2784 | ||
2785 | rc = ebitmap_write(&usrdatum->roles, fp); | |
2786 | if (rc) | |
2787 | return rc; | |
2788 | ||
2789 | rc = mls_write_range_helper(&usrdatum->range, fp); | |
2790 | if (rc) | |
2791 | return rc; | |
2792 | ||
2793 | rc = mls_write_level(&usrdatum->dfltlevel, fp); | |
2794 | if (rc) | |
2795 | return rc; | |
2796 | ||
2797 | return 0; | |
2798 | } | |
2799 | ||
2800 | static int (*write_f[SYM_NUM]) (void *key, void *datum, | |
2801 | void *datap) = | |
2802 | { | |
2803 | common_write, | |
2804 | class_write, | |
2805 | role_write, | |
2806 | type_write, | |
2807 | user_write, | |
2808 | cond_write_bool, | |
2809 | sens_write, | |
2810 | cat_write, | |
2811 | }; | |
2812 | ||
2813 | static int ocontext_write(struct policydb *p, struct policydb_compat_info *info, | |
2814 | void *fp) | |
2815 | { | |
2816 | unsigned int i, j, rc; | |
2817 | size_t nel, len; | |
2818 | __le32 buf[3]; | |
2819 | u32 nodebuf[8]; | |
2820 | struct ocontext *c; | |
2821 | for (i = 0; i < info->ocon_num; i++) { | |
2822 | nel = 0; | |
2823 | for (c = p->ocontexts[i]; c; c = c->next) | |
2824 | nel++; | |
2825 | buf[0] = cpu_to_le32(nel); | |
2826 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
2827 | if (rc) | |
2828 | return rc; | |
2829 | for (c = p->ocontexts[i]; c; c = c->next) { | |
2830 | switch (i) { | |
2831 | case OCON_ISID: | |
2832 | buf[0] = cpu_to_le32(c->sid[0]); | |
2833 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
2834 | if (rc) | |
2835 | return rc; | |
2836 | rc = context_write(p, &c->context[0], fp); | |
2837 | if (rc) | |
2838 | return rc; | |
2839 | break; | |
2840 | case OCON_FS: | |
2841 | case OCON_NETIF: | |
2842 | len = strlen(c->u.name); | |
2843 | buf[0] = cpu_to_le32(len); | |
2844 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
2845 | if (rc) | |
2846 | return rc; | |
2847 | rc = put_entry(c->u.name, 1, len, fp); | |
2848 | if (rc) | |
2849 | return rc; | |
2850 | rc = context_write(p, &c->context[0], fp); | |
2851 | if (rc) | |
2852 | return rc; | |
2853 | rc = context_write(p, &c->context[1], fp); | |
2854 | if (rc) | |
2855 | return rc; | |
2856 | break; | |
2857 | case OCON_PORT: | |
2858 | buf[0] = cpu_to_le32(c->u.port.protocol); | |
2859 | buf[1] = cpu_to_le32(c->u.port.low_port); | |
2860 | buf[2] = cpu_to_le32(c->u.port.high_port); | |
2861 | rc = put_entry(buf, sizeof(u32), 3, fp); | |
2862 | if (rc) | |
2863 | return rc; | |
2864 | rc = context_write(p, &c->context[0], fp); | |
2865 | if (rc) | |
2866 | return rc; | |
2867 | break; | |
2868 | case OCON_NODE: | |
2869 | nodebuf[0] = c->u.node.addr; /* network order */ | |
2870 | nodebuf[1] = c->u.node.mask; /* network order */ | |
2871 | rc = put_entry(nodebuf, sizeof(u32), 2, fp); | |
2872 | if (rc) | |
2873 | return rc; | |
2874 | rc = context_write(p, &c->context[0], fp); | |
2875 | if (rc) | |
2876 | return rc; | |
2877 | break; | |
2878 | case OCON_FSUSE: | |
2879 | buf[0] = cpu_to_le32(c->v.behavior); | |
2880 | len = strlen(c->u.name); | |
2881 | buf[1] = cpu_to_le32(len); | |
2882 | rc = put_entry(buf, sizeof(u32), 2, fp); | |
2883 | if (rc) | |
2884 | return rc; | |
2885 | rc = put_entry(c->u.name, 1, len, fp); | |
2886 | if (rc) | |
2887 | return rc; | |
2888 | rc = context_write(p, &c->context[0], fp); | |
2889 | if (rc) | |
2890 | return rc; | |
2891 | break; | |
2892 | case OCON_NODE6: | |
2893 | for (j = 0; j < 4; j++) | |
2894 | nodebuf[j] = c->u.node6.addr[j]; /* network order */ | |
2895 | for (j = 0; j < 4; j++) | |
2896 | nodebuf[j + 4] = c->u.node6.mask[j]; /* network order */ | |
2897 | rc = put_entry(nodebuf, sizeof(u32), 8, fp); | |
2898 | if (rc) | |
2899 | return rc; | |
2900 | rc = context_write(p, &c->context[0], fp); | |
2901 | if (rc) | |
2902 | return rc; | |
2903 | break; | |
2904 | } | |
2905 | } | |
2906 | } | |
2907 | return 0; | |
2908 | } | |
2909 | ||
2910 | static int genfs_write(struct policydb *p, void *fp) | |
2911 | { | |
2912 | struct genfs *genfs; | |
2913 | struct ocontext *c; | |
2914 | size_t len; | |
2915 | __le32 buf[1]; | |
2916 | int rc; | |
2917 | ||
2918 | len = 0; | |
2919 | for (genfs = p->genfs; genfs; genfs = genfs->next) | |
2920 | len++; | |
2921 | buf[0] = cpu_to_le32(len); | |
2922 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
2923 | if (rc) | |
2924 | return rc; | |
2925 | for (genfs = p->genfs; genfs; genfs = genfs->next) { | |
2926 | len = strlen(genfs->fstype); | |
2927 | buf[0] = cpu_to_le32(len); | |
2928 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
2929 | if (rc) | |
2930 | return rc; | |
2931 | rc = put_entry(genfs->fstype, 1, len, fp); | |
2932 | if (rc) | |
2933 | return rc; | |
2934 | len = 0; | |
2935 | for (c = genfs->head; c; c = c->next) | |
2936 | len++; | |
2937 | buf[0] = cpu_to_le32(len); | |
2938 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
2939 | if (rc) | |
2940 | return rc; | |
2941 | for (c = genfs->head; c; c = c->next) { | |
2942 | len = strlen(c->u.name); | |
2943 | buf[0] = cpu_to_le32(len); | |
2944 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
2945 | if (rc) | |
2946 | return rc; | |
2947 | rc = put_entry(c->u.name, 1, len, fp); | |
2948 | if (rc) | |
2949 | return rc; | |
2950 | buf[0] = cpu_to_le32(c->v.sclass); | |
2951 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
2952 | if (rc) | |
2953 | return rc; | |
2954 | rc = context_write(p, &c->context[0], fp); | |
2955 | if (rc) | |
2956 | return rc; | |
2957 | } | |
2958 | } | |
2959 | return 0; | |
2960 | } | |
2961 | ||
2962 | static int range_count(void *key, void *data, void *ptr) | |
2963 | { | |
2964 | int *cnt = ptr; | |
2965 | *cnt = *cnt + 1; | |
2966 | ||
2967 | return 0; | |
2968 | } | |
2969 | ||
2970 | static int range_write_helper(void *key, void *data, void *ptr) | |
2971 | { | |
2972 | __le32 buf[2]; | |
2973 | struct range_trans *rt = key; | |
2974 | struct mls_range *r = data; | |
2975 | struct policy_data *pd = ptr; | |
2976 | void *fp = pd->fp; | |
2977 | struct policydb *p = pd->p; | |
2978 | int rc; | |
2979 | ||
2980 | buf[0] = cpu_to_le32(rt->source_type); | |
2981 | buf[1] = cpu_to_le32(rt->target_type); | |
2982 | rc = put_entry(buf, sizeof(u32), 2, fp); | |
2983 | if (rc) | |
2984 | return rc; | |
2985 | if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) { | |
2986 | buf[0] = cpu_to_le32(rt->target_class); | |
2987 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
2988 | if (rc) | |
2989 | return rc; | |
2990 | } | |
2991 | rc = mls_write_range_helper(r, fp); | |
2992 | if (rc) | |
2993 | return rc; | |
2994 | ||
2995 | return 0; | |
2996 | } | |
2997 | ||
2998 | static int range_write(struct policydb *p, void *fp) | |
2999 | { | |
3000 | size_t nel; | |
3001 | __le32 buf[1]; | |
3002 | int rc; | |
3003 | struct policy_data pd; | |
3004 | ||
3005 | pd.p = p; | |
3006 | pd.fp = fp; | |
3007 | ||
3008 | /* count the number of entries in the hashtab */ | |
3009 | nel = 0; | |
3010 | rc = hashtab_map(p->range_tr, range_count, &nel); | |
3011 | if (rc) | |
3012 | return rc; | |
3013 | ||
3014 | buf[0] = cpu_to_le32(nel); | |
3015 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
3016 | if (rc) | |
3017 | return rc; | |
3018 | ||
3019 | /* actually write all of the entries */ | |
3020 | rc = hashtab_map(p->range_tr, range_write_helper, &pd); | |
3021 | if (rc) | |
3022 | return rc; | |
3023 | ||
3024 | return 0; | |
3025 | } | |
3026 | ||
3027 | /* | |
3028 | * Write the configuration data in a policy database | |
3029 | * structure to a policy database binary representation | |
3030 | * file. | |
3031 | */ | |
3032 | int policydb_write(struct policydb *p, void *fp) | |
3033 | { | |
3034 | unsigned int i, num_syms; | |
3035 | int rc; | |
3036 | __le32 buf[4]; | |
3037 | u32 config; | |
3038 | size_t len; | |
3039 | struct policydb_compat_info *info; | |
3040 | ||
3041 | /* | |
3042 | * refuse to write policy older than compressed avtab | |
3043 | * to simplify the writer. There are other tests dropped | |
3044 | * since we assume this throughout the writer code. Be | |
3045 | * careful if you ever try to remove this restriction | |
3046 | */ | |
3047 | if (p->policyvers < POLICYDB_VERSION_AVTAB) { | |
3048 | printk(KERN_ERR "SELinux: refusing to write policy version %d." | |
3049 | " Because it is less than version %d\n", p->policyvers, | |
3050 | POLICYDB_VERSION_AVTAB); | |
3051 | return -EINVAL; | |
3052 | } | |
3053 | ||
3054 | config = 0; | |
3055 | if (p->mls_enabled) | |
3056 | config |= POLICYDB_CONFIG_MLS; | |
3057 | ||
3058 | if (p->reject_unknown) | |
3059 | config |= REJECT_UNKNOWN; | |
3060 | if (p->allow_unknown) | |
3061 | config |= ALLOW_UNKNOWN; | |
3062 | ||
3063 | /* Write the magic number and string identifiers. */ | |
3064 | buf[0] = cpu_to_le32(POLICYDB_MAGIC); | |
3065 | len = strlen(POLICYDB_STRING); | |
3066 | buf[1] = cpu_to_le32(len); | |
3067 | rc = put_entry(buf, sizeof(u32), 2, fp); | |
3068 | if (rc) | |
3069 | return rc; | |
3070 | rc = put_entry(POLICYDB_STRING, 1, len, fp); | |
3071 | if (rc) | |
3072 | return rc; | |
3073 | ||
3074 | /* Write the version, config, and table sizes. */ | |
3075 | info = policydb_lookup_compat(p->policyvers); | |
3076 | if (!info) { | |
3077 | printk(KERN_ERR "SELinux: compatibility lookup failed for policy " | |
3078 | "version %d", p->policyvers); | |
3079 | return rc; | |
3080 | } | |
3081 | ||
3082 | buf[0] = cpu_to_le32(p->policyvers); | |
3083 | buf[1] = cpu_to_le32(config); | |
3084 | buf[2] = cpu_to_le32(info->sym_num); | |
3085 | buf[3] = cpu_to_le32(info->ocon_num); | |
3086 | ||
3087 | rc = put_entry(buf, sizeof(u32), 4, fp); | |
3088 | if (rc) | |
3089 | return rc; | |
3090 | ||
3091 | if (p->policyvers >= POLICYDB_VERSION_POLCAP) { | |
3092 | rc = ebitmap_write(&p->policycaps, fp); | |
3093 | if (rc) | |
3094 | return rc; | |
3095 | } | |
3096 | ||
3097 | if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE) { | |
3098 | rc = ebitmap_write(&p->permissive_map, fp); | |
3099 | if (rc) | |
3100 | return rc; | |
3101 | } | |
3102 | ||
3103 | num_syms = info->sym_num; | |
3104 | for (i = 0; i < num_syms; i++) { | |
3105 | struct policy_data pd; | |
3106 | ||
3107 | pd.fp = fp; | |
3108 | pd.p = p; | |
3109 | ||
3110 | buf[0] = cpu_to_le32(p->symtab[i].nprim); | |
3111 | buf[1] = cpu_to_le32(p->symtab[i].table->nel); | |
3112 | ||
3113 | rc = put_entry(buf, sizeof(u32), 2, fp); | |
3114 | if (rc) | |
3115 | return rc; | |
3116 | rc = hashtab_map(p->symtab[i].table, write_f[i], &pd); | |
3117 | if (rc) | |
3118 | return rc; | |
3119 | } | |
3120 | ||
3121 | rc = avtab_write(p, &p->te_avtab, fp); | |
3122 | if (rc) | |
3123 | return rc; | |
3124 | ||
3125 | rc = cond_write_list(p, p->cond_list, fp); | |
3126 | if (rc) | |
3127 | return rc; | |
3128 | ||
3129 | rc = role_trans_write(p->role_tr, fp); | |
3130 | if (rc) | |
3131 | return rc; | |
3132 | ||
3133 | rc = role_allow_write(p->role_allow, fp); | |
3134 | if (rc) | |
3135 | return rc; | |
3136 | ||
3137 | rc = ocontext_write(p, info, fp); | |
3138 | if (rc) | |
3139 | return rc; | |
3140 | ||
3141 | rc = genfs_write(p, fp); | |
3142 | if (rc) | |
3143 | return rc; | |
3144 | ||
3145 | rc = range_write(p, fp); | |
3146 | if (rc) | |
3147 | return rc; | |
3148 | ||
3149 | for (i = 0; i < p->p_types.nprim; i++) { | |
3150 | struct ebitmap *e = flex_array_get(p->type_attr_map_array, i); | |
3151 | ||
3152 | BUG_ON(!e); | |
3153 | rc = ebitmap_write(e, fp); | |
3154 | if (rc) | |
3155 | return rc; | |
3156 | } | |
3157 | ||
3158 | return 0; | |
3159 | } |