Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Implementation of the policy database. | |
3 | * | |
4 | * Author : Stephen Smalley, <sds@epoch.ncsc.mil> | |
5 | */ | |
6 | ||
7 | /* | |
8 | * Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com> | |
9 | * | |
10 | * Support for enhanced MLS infrastructure. | |
11 | * | |
12 | * Updated: Frank Mayer <mayerf@tresys.com> and Karl MacMillan <kmacmillan@tresys.com> | |
13 | * | |
2ced3dfd | 14 | * Added conditional policy language extensions |
1da177e4 | 15 | * |
82c21bfa | 16 | * Updated: Hewlett-Packard <paul@paul-moore.com> |
3bb56b25 PM |
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 | }, | |
652bb9b0 EP |
126 | { |
127 | .version = POLICYDB_VERSION_FILENAME_TRANS, | |
128 | .sym_num = SYM_NUM, | |
129 | .ocon_num = OCON_NUM, | |
130 | }, | |
8023976c HC |
131 | { |
132 | .version = POLICYDB_VERSION_ROLETRANS, | |
133 | .sym_num = SYM_NUM, | |
134 | .ocon_num = OCON_NUM, | |
135 | }, | |
aa893269 EP |
136 | { |
137 | .version = POLICYDB_VERSION_NEW_OBJECT_DEFAULTS, | |
138 | .sym_num = SYM_NUM, | |
139 | .ocon_num = OCON_NUM, | |
140 | }, | |
eed7795d EP |
141 | { |
142 | .version = POLICYDB_VERSION_DEFAULT_TYPE, | |
143 | .sym_num = SYM_NUM, | |
144 | .ocon_num = OCON_NUM, | |
145 | }, | |
a660bec1 RH |
146 | { |
147 | .version = POLICYDB_VERSION_CONSTRAINT_NAMES, | |
148 | .sym_num = SYM_NUM, | |
149 | .ocon_num = OCON_NUM, | |
150 | }, | |
1da177e4 LT |
151 | }; |
152 | ||
153 | static struct policydb_compat_info *policydb_lookup_compat(int version) | |
154 | { | |
155 | int i; | |
156 | struct policydb_compat_info *info = NULL; | |
157 | ||
32725ad8 | 158 | for (i = 0; i < ARRAY_SIZE(policydb_compat); i++) { |
1da177e4 LT |
159 | if (policydb_compat[i].version == version) { |
160 | info = &policydb_compat[i]; | |
161 | break; | |
162 | } | |
163 | } | |
164 | return info; | |
165 | } | |
166 | ||
167 | /* | |
168 | * Initialize the role table. | |
169 | */ | |
170 | static int roles_init(struct policydb *p) | |
171 | { | |
172 | char *key = NULL; | |
173 | int rc; | |
174 | struct role_datum *role; | |
175 | ||
9398c7f7 | 176 | rc = -ENOMEM; |
89d155ef | 177 | role = kzalloc(sizeof(*role), GFP_KERNEL); |
9398c7f7 | 178 | if (!role) |
1da177e4 | 179 | goto out; |
9398c7f7 EP |
180 | |
181 | rc = -EINVAL; | |
1da177e4 | 182 | role->value = ++p->p_roles.nprim; |
9398c7f7 EP |
183 | if (role->value != OBJECT_R_VAL) |
184 | goto out; | |
185 | ||
186 | rc = -ENOMEM; | |
b3139bbc | 187 | key = kstrdup(OBJECT_R, GFP_KERNEL); |
9398c7f7 EP |
188 | if (!key) |
189 | goto out; | |
190 | ||
1da177e4 LT |
191 | rc = hashtab_insert(p->p_roles.table, key, role); |
192 | if (rc) | |
9398c7f7 | 193 | goto out; |
1da177e4 | 194 | |
9398c7f7 EP |
195 | return 0; |
196 | out: | |
1da177e4 | 197 | kfree(key); |
1da177e4 | 198 | kfree(role); |
9398c7f7 | 199 | return rc; |
1da177e4 LT |
200 | } |
201 | ||
2463c26d EP |
202 | static u32 filenametr_hash(struct hashtab *h, const void *k) |
203 | { | |
204 | const struct filename_trans *ft = k; | |
205 | unsigned long hash; | |
206 | unsigned int byte_num; | |
207 | unsigned char focus; | |
208 | ||
209 | hash = ft->stype ^ ft->ttype ^ ft->tclass; | |
210 | ||
211 | byte_num = 0; | |
212 | while ((focus = ft->name[byte_num++])) | |
213 | hash = partial_name_hash(focus, hash); | |
214 | return hash & (h->size - 1); | |
215 | } | |
216 | ||
217 | static int filenametr_cmp(struct hashtab *h, const void *k1, const void *k2) | |
218 | { | |
219 | const struct filename_trans *ft1 = k1; | |
220 | const struct filename_trans *ft2 = k2; | |
221 | int v; | |
222 | ||
223 | v = ft1->stype - ft2->stype; | |
224 | if (v) | |
225 | return v; | |
226 | ||
227 | v = ft1->ttype - ft2->ttype; | |
228 | if (v) | |
229 | return v; | |
230 | ||
231 | v = ft1->tclass - ft2->tclass; | |
232 | if (v) | |
233 | return v; | |
234 | ||
235 | return strcmp(ft1->name, ft2->name); | |
236 | ||
237 | } | |
238 | ||
2f3e82d6 SS |
239 | static u32 rangetr_hash(struct hashtab *h, const void *k) |
240 | { | |
241 | const struct range_trans *key = k; | |
242 | return (key->source_type + (key->target_type << 3) + | |
243 | (key->target_class << 5)) & (h->size - 1); | |
244 | } | |
245 | ||
246 | static int rangetr_cmp(struct hashtab *h, const void *k1, const void *k2) | |
247 | { | |
248 | const struct range_trans *key1 = k1, *key2 = k2; | |
4419aae1 EP |
249 | int v; |
250 | ||
251 | v = key1->source_type - key2->source_type; | |
252 | if (v) | |
253 | return v; | |
254 | ||
255 | v = key1->target_type - key2->target_type; | |
256 | if (v) | |
257 | return v; | |
258 | ||
259 | v = key1->target_class - key2->target_class; | |
260 | ||
261 | return v; | |
2f3e82d6 SS |
262 | } |
263 | ||
1da177e4 LT |
264 | /* |
265 | * Initialize a policy database structure. | |
266 | */ | |
267 | static int policydb_init(struct policydb *p) | |
268 | { | |
269 | int i, rc; | |
270 | ||
271 | memset(p, 0, sizeof(*p)); | |
272 | ||
273 | for (i = 0; i < SYM_NUM; i++) { | |
274 | rc = symtab_init(&p->symtab[i], symtab_sizes[i]); | |
275 | if (rc) | |
9398c7f7 | 276 | goto out; |
1da177e4 LT |
277 | } |
278 | ||
279 | rc = avtab_init(&p->te_avtab); | |
280 | if (rc) | |
9398c7f7 | 281 | goto out; |
1da177e4 LT |
282 | |
283 | rc = roles_init(p); | |
284 | if (rc) | |
9398c7f7 | 285 | goto out; |
1da177e4 LT |
286 | |
287 | rc = cond_policydb_init(p); | |
288 | if (rc) | |
9398c7f7 | 289 | goto out; |
1da177e4 | 290 | |
2463c26d EP |
291 | p->filename_trans = hashtab_create(filenametr_hash, filenametr_cmp, (1 << 10)); |
292 | if (!p->filename_trans) | |
293 | goto out; | |
294 | ||
2f3e82d6 SS |
295 | p->range_tr = hashtab_create(rangetr_hash, rangetr_cmp, 256); |
296 | if (!p->range_tr) | |
9398c7f7 | 297 | goto out; |
2f3e82d6 | 298 | |
03a4c018 | 299 | ebitmap_init(&p->filename_trans_ttypes); |
3bb56b25 | 300 | ebitmap_init(&p->policycaps); |
64dbf074 | 301 | ebitmap_init(&p->permissive_map); |
3bb56b25 | 302 | |
9398c7f7 | 303 | return 0; |
1da177e4 | 304 | out: |
2463c26d EP |
305 | hashtab_destroy(p->filename_trans); |
306 | hashtab_destroy(p->range_tr); | |
1da177e4 LT |
307 | for (i = 0; i < SYM_NUM; i++) |
308 | hashtab_destroy(p->symtab[i].table); | |
9398c7f7 | 309 | return rc; |
1da177e4 LT |
310 | } |
311 | ||
312 | /* | |
313 | * The following *_index functions are used to | |
314 | * define the val_to_name and val_to_struct arrays | |
315 | * in a policy database structure. The val_to_name | |
316 | * arrays are used when converting security context | |
317 | * structures into string representations. The | |
318 | * val_to_struct arrays are used when the attributes | |
319 | * of a class, role, or user are needed. | |
320 | */ | |
321 | ||
322 | static int common_index(void *key, void *datum, void *datap) | |
323 | { | |
324 | struct policydb *p; | |
325 | struct common_datum *comdatum; | |
ac76c05b | 326 | struct flex_array *fa; |
1da177e4 LT |
327 | |
328 | comdatum = datum; | |
329 | p = datap; | |
330 | if (!comdatum->value || comdatum->value > p->p_commons.nprim) | |
331 | return -EINVAL; | |
ac76c05b EP |
332 | |
333 | fa = p->sym_val_to_name[SYM_COMMONS]; | |
334 | if (flex_array_put_ptr(fa, comdatum->value - 1, key, | |
335 | GFP_KERNEL | __GFP_ZERO)) | |
336 | BUG(); | |
1da177e4 LT |
337 | return 0; |
338 | } | |
339 | ||
340 | static int class_index(void *key, void *datum, void *datap) | |
341 | { | |
342 | struct policydb *p; | |
343 | struct class_datum *cladatum; | |
ac76c05b | 344 | struct flex_array *fa; |
1da177e4 LT |
345 | |
346 | cladatum = datum; | |
347 | p = datap; | |
348 | if (!cladatum->value || cladatum->value > p->p_classes.nprim) | |
349 | return -EINVAL; | |
ac76c05b EP |
350 | fa = p->sym_val_to_name[SYM_CLASSES]; |
351 | if (flex_array_put_ptr(fa, cladatum->value - 1, key, | |
352 | GFP_KERNEL | __GFP_ZERO)) | |
353 | BUG(); | |
1da177e4 LT |
354 | p->class_val_to_struct[cladatum->value - 1] = cladatum; |
355 | return 0; | |
356 | } | |
357 | ||
358 | static int role_index(void *key, void *datum, void *datap) | |
359 | { | |
360 | struct policydb *p; | |
361 | struct role_datum *role; | |
ac76c05b | 362 | struct flex_array *fa; |
1da177e4 LT |
363 | |
364 | role = datum; | |
365 | p = datap; | |
d9250dea KK |
366 | if (!role->value |
367 | || role->value > p->p_roles.nprim | |
368 | || role->bounds > p->p_roles.nprim) | |
1da177e4 | 369 | return -EINVAL; |
ac76c05b EP |
370 | |
371 | fa = p->sym_val_to_name[SYM_ROLES]; | |
372 | if (flex_array_put_ptr(fa, role->value - 1, key, | |
373 | GFP_KERNEL | __GFP_ZERO)) | |
374 | BUG(); | |
1da177e4 LT |
375 | p->role_val_to_struct[role->value - 1] = role; |
376 | return 0; | |
377 | } | |
378 | ||
379 | static int type_index(void *key, void *datum, void *datap) | |
380 | { | |
381 | struct policydb *p; | |
382 | struct type_datum *typdatum; | |
ac76c05b | 383 | struct flex_array *fa; |
1da177e4 LT |
384 | |
385 | typdatum = datum; | |
386 | p = datap; | |
387 | ||
388 | if (typdatum->primary) { | |
d9250dea KK |
389 | if (!typdatum->value |
390 | || typdatum->value > p->p_types.nprim | |
391 | || typdatum->bounds > p->p_types.nprim) | |
1da177e4 | 392 | return -EINVAL; |
ac76c05b EP |
393 | fa = p->sym_val_to_name[SYM_TYPES]; |
394 | if (flex_array_put_ptr(fa, typdatum->value - 1, key, | |
395 | GFP_KERNEL | __GFP_ZERO)) | |
396 | BUG(); | |
397 | ||
398 | fa = p->type_val_to_struct_array; | |
399 | if (flex_array_put_ptr(fa, typdatum->value - 1, typdatum, | |
23bdecb0 EP |
400 | GFP_KERNEL | __GFP_ZERO)) |
401 | BUG(); | |
1da177e4 LT |
402 | } |
403 | ||
404 | return 0; | |
405 | } | |
406 | ||
407 | static int user_index(void *key, void *datum, void *datap) | |
408 | { | |
409 | struct policydb *p; | |
410 | struct user_datum *usrdatum; | |
ac76c05b | 411 | struct flex_array *fa; |
1da177e4 LT |
412 | |
413 | usrdatum = datum; | |
414 | p = datap; | |
d9250dea KK |
415 | if (!usrdatum->value |
416 | || usrdatum->value > p->p_users.nprim | |
417 | || usrdatum->bounds > p->p_users.nprim) | |
1da177e4 | 418 | return -EINVAL; |
ac76c05b EP |
419 | |
420 | fa = p->sym_val_to_name[SYM_USERS]; | |
421 | if (flex_array_put_ptr(fa, usrdatum->value - 1, key, | |
422 | GFP_KERNEL | __GFP_ZERO)) | |
423 | BUG(); | |
1da177e4 LT |
424 | p->user_val_to_struct[usrdatum->value - 1] = usrdatum; |
425 | return 0; | |
426 | } | |
427 | ||
428 | static int sens_index(void *key, void *datum, void *datap) | |
429 | { | |
430 | struct policydb *p; | |
431 | struct level_datum *levdatum; | |
ac76c05b | 432 | struct flex_array *fa; |
1da177e4 LT |
433 | |
434 | levdatum = datum; | |
435 | p = datap; | |
436 | ||
437 | if (!levdatum->isalias) { | |
438 | if (!levdatum->level->sens || | |
439 | levdatum->level->sens > p->p_levels.nprim) | |
440 | return -EINVAL; | |
ac76c05b EP |
441 | fa = p->sym_val_to_name[SYM_LEVELS]; |
442 | if (flex_array_put_ptr(fa, levdatum->level->sens - 1, key, | |
443 | GFP_KERNEL | __GFP_ZERO)) | |
444 | BUG(); | |
1da177e4 LT |
445 | } |
446 | ||
447 | return 0; | |
448 | } | |
449 | ||
450 | static int cat_index(void *key, void *datum, void *datap) | |
451 | { | |
452 | struct policydb *p; | |
453 | struct cat_datum *catdatum; | |
ac76c05b | 454 | struct flex_array *fa; |
1da177e4 LT |
455 | |
456 | catdatum = datum; | |
457 | p = datap; | |
458 | ||
459 | if (!catdatum->isalias) { | |
460 | if (!catdatum->value || catdatum->value > p->p_cats.nprim) | |
461 | return -EINVAL; | |
ac76c05b EP |
462 | fa = p->sym_val_to_name[SYM_CATS]; |
463 | if (flex_array_put_ptr(fa, catdatum->value - 1, key, | |
464 | GFP_KERNEL | __GFP_ZERO)) | |
465 | BUG(); | |
1da177e4 LT |
466 | } |
467 | ||
468 | return 0; | |
469 | } | |
470 | ||
471 | static int (*index_f[SYM_NUM]) (void *key, void *datum, void *datap) = | |
472 | { | |
473 | common_index, | |
474 | class_index, | |
475 | role_index, | |
476 | type_index, | |
477 | user_index, | |
478 | cond_index_bool, | |
479 | sens_index, | |
480 | cat_index, | |
481 | }; | |
482 | ||
1da177e4 | 483 | #ifdef DEBUG_HASHES |
be30b16d | 484 | static void hash_eval(struct hashtab *h, const char *hash_name) |
1da177e4 | 485 | { |
be30b16d | 486 | struct hashtab_info info; |
1da177e4 | 487 | |
be30b16d EP |
488 | hashtab_stat(h, &info); |
489 | printk(KERN_DEBUG "SELinux: %s: %d entries and %d/%d buckets used, " | |
490 | "longest chain length %d\n", hash_name, h->nel, | |
491 | info.slots_used, h->size, info.max_chain_len); | |
1da177e4 | 492 | } |
2f3e82d6 | 493 | |
be30b16d | 494 | static void symtab_hash_eval(struct symtab *s) |
2f3e82d6 | 495 | { |
be30b16d | 496 | int i; |
2f3e82d6 | 497 | |
be30b16d EP |
498 | for (i = 0; i < SYM_NUM; i++) |
499 | hash_eval(s[i].table, symtab_name[i]); | |
2f3e82d6 | 500 | } |
be30b16d | 501 | |
2f3e82d6 | 502 | #else |
be30b16d | 503 | static inline void hash_eval(struct hashtab *h, char *hash_name) |
2f3e82d6 SS |
504 | { |
505 | } | |
1da177e4 LT |
506 | #endif |
507 | ||
508 | /* | |
509 | * Define the other val_to_name and val_to_struct arrays | |
510 | * in a policy database structure. | |
511 | * | |
512 | * Caller must clean up on failure. | |
513 | */ | |
1d9bc6dc | 514 | static int policydb_index(struct policydb *p) |
1da177e4 | 515 | { |
9398c7f7 | 516 | int i, rc; |
1da177e4 | 517 | |
454d972c | 518 | printk(KERN_DEBUG "SELinux: %d users, %d roles, %d types, %d bools", |
1da177e4 | 519 | p->p_users.nprim, p->p_roles.nprim, p->p_types.nprim, p->p_bools.nprim); |
0719aaf5 | 520 | if (p->mls_enabled) |
1da177e4 LT |
521 | printk(", %d sens, %d cats", p->p_levels.nprim, |
522 | p->p_cats.nprim); | |
523 | printk("\n"); | |
524 | ||
454d972c | 525 | printk(KERN_DEBUG "SELinux: %d classes, %d rules\n", |
1da177e4 LT |
526 | p->p_classes.nprim, p->te_avtab.nel); |
527 | ||
528 | #ifdef DEBUG_HASHES | |
529 | avtab_hash_eval(&p->te_avtab, "rules"); | |
530 | symtab_hash_eval(p->symtab); | |
531 | #endif | |
532 | ||
1d9bc6dc EP |
533 | rc = -ENOMEM; |
534 | p->class_val_to_struct = | |
535 | kmalloc(p->p_classes.nprim * sizeof(*(p->class_val_to_struct)), | |
536 | GFP_KERNEL); | |
537 | if (!p->class_val_to_struct) | |
538 | goto out; | |
539 | ||
9398c7f7 | 540 | rc = -ENOMEM; |
1da177e4 LT |
541 | p->role_val_to_struct = |
542 | kmalloc(p->p_roles.nprim * sizeof(*(p->role_val_to_struct)), | |
2ced3dfd | 543 | GFP_KERNEL); |
9398c7f7 | 544 | if (!p->role_val_to_struct) |
1da177e4 | 545 | goto out; |
1da177e4 | 546 | |
9398c7f7 | 547 | rc = -ENOMEM; |
1da177e4 LT |
548 | p->user_val_to_struct = |
549 | kmalloc(p->p_users.nprim * sizeof(*(p->user_val_to_struct)), | |
2ced3dfd | 550 | GFP_KERNEL); |
9398c7f7 | 551 | if (!p->user_val_to_struct) |
1da177e4 | 552 | goto out; |
1da177e4 | 553 | |
23bdecb0 | 554 | /* Yes, I want the sizeof the pointer, not the structure */ |
9398c7f7 | 555 | rc = -ENOMEM; |
23bdecb0 EP |
556 | p->type_val_to_struct_array = flex_array_alloc(sizeof(struct type_datum *), |
557 | p->p_types.nprim, | |
558 | GFP_KERNEL | __GFP_ZERO); | |
559 | if (!p->type_val_to_struct_array) | |
560 | goto out; | |
561 | ||
562 | rc = flex_array_prealloc(p->type_val_to_struct_array, 0, | |
5a3ea878 | 563 | p->p_types.nprim, GFP_KERNEL | __GFP_ZERO); |
23bdecb0 | 564 | if (rc) |
d9250dea | 565 | goto out; |
d9250dea | 566 | |
3ac285ff DB |
567 | rc = cond_init_bool_indexes(p); |
568 | if (rc) | |
1da177e4 | 569 | goto out; |
1da177e4 | 570 | |
1d9bc6dc | 571 | for (i = 0; i < SYM_NUM; i++) { |
9398c7f7 | 572 | rc = -ENOMEM; |
ac76c05b EP |
573 | p->sym_val_to_name[i] = flex_array_alloc(sizeof(char *), |
574 | p->symtab[i].nprim, | |
575 | GFP_KERNEL | __GFP_ZERO); | |
9398c7f7 | 576 | if (!p->sym_val_to_name[i]) |
1da177e4 | 577 | goto out; |
ac76c05b EP |
578 | |
579 | rc = flex_array_prealloc(p->sym_val_to_name[i], | |
5a3ea878 | 580 | 0, p->symtab[i].nprim, |
ac76c05b EP |
581 | GFP_KERNEL | __GFP_ZERO); |
582 | if (rc) | |
583 | goto out; | |
584 | ||
1da177e4 LT |
585 | rc = hashtab_map(p->symtab[i].table, index_f[i], p); |
586 | if (rc) | |
587 | goto out; | |
588 | } | |
9398c7f7 | 589 | rc = 0; |
1da177e4 LT |
590 | out: |
591 | return rc; | |
592 | } | |
593 | ||
594 | /* | |
595 | * The following *_destroy functions are used to | |
596 | * free any memory allocated for each kind of | |
597 | * symbol data in the policy database. | |
598 | */ | |
599 | ||
600 | static int perm_destroy(void *key, void *datum, void *p) | |
601 | { | |
602 | kfree(key); | |
603 | kfree(datum); | |
604 | return 0; | |
605 | } | |
606 | ||
607 | static int common_destroy(void *key, void *datum, void *p) | |
608 | { | |
609 | struct common_datum *comdatum; | |
610 | ||
611 | kfree(key); | |
9398c7f7 EP |
612 | if (datum) { |
613 | comdatum = datum; | |
614 | hashtab_map(comdatum->permissions.table, perm_destroy, NULL); | |
615 | hashtab_destroy(comdatum->permissions.table); | |
616 | } | |
1da177e4 LT |
617 | kfree(datum); |
618 | return 0; | |
619 | } | |
620 | ||
a660bec1 RH |
621 | static void constraint_expr_destroy(struct constraint_expr *expr) |
622 | { | |
623 | if (expr) { | |
624 | ebitmap_destroy(&expr->names); | |
625 | if (expr->type_names) { | |
626 | ebitmap_destroy(&expr->type_names->types); | |
627 | ebitmap_destroy(&expr->type_names->negset); | |
628 | kfree(expr->type_names); | |
629 | } | |
630 | kfree(expr); | |
631 | } | |
632 | } | |
633 | ||
6cbda6b6 | 634 | static int cls_destroy(void *key, void *datum, void *p) |
1da177e4 LT |
635 | { |
636 | struct class_datum *cladatum; | |
637 | struct constraint_node *constraint, *ctemp; | |
638 | struct constraint_expr *e, *etmp; | |
639 | ||
640 | kfree(key); | |
9398c7f7 EP |
641 | if (datum) { |
642 | cladatum = datum; | |
643 | hashtab_map(cladatum->permissions.table, perm_destroy, NULL); | |
644 | hashtab_destroy(cladatum->permissions.table); | |
645 | constraint = cladatum->constraints; | |
646 | while (constraint) { | |
647 | e = constraint->expr; | |
648 | while (e) { | |
9398c7f7 EP |
649 | etmp = e; |
650 | e = e->next; | |
a660bec1 | 651 | constraint_expr_destroy(etmp); |
9398c7f7 EP |
652 | } |
653 | ctemp = constraint; | |
654 | constraint = constraint->next; | |
655 | kfree(ctemp); | |
1da177e4 | 656 | } |
9398c7f7 EP |
657 | |
658 | constraint = cladatum->validatetrans; | |
659 | while (constraint) { | |
660 | e = constraint->expr; | |
661 | while (e) { | |
9398c7f7 EP |
662 | etmp = e; |
663 | e = e->next; | |
a660bec1 | 664 | constraint_expr_destroy(etmp); |
9398c7f7 EP |
665 | } |
666 | ctemp = constraint; | |
667 | constraint = constraint->next; | |
668 | kfree(ctemp); | |
1da177e4 | 669 | } |
9398c7f7 EP |
670 | kfree(cladatum->comkey); |
671 | } | |
1da177e4 LT |
672 | kfree(datum); |
673 | return 0; | |
674 | } | |
675 | ||
676 | static int role_destroy(void *key, void *datum, void *p) | |
677 | { | |
678 | struct role_datum *role; | |
679 | ||
680 | kfree(key); | |
9398c7f7 EP |
681 | if (datum) { |
682 | role = datum; | |
683 | ebitmap_destroy(&role->dominates); | |
684 | ebitmap_destroy(&role->types); | |
685 | } | |
1da177e4 LT |
686 | kfree(datum); |
687 | return 0; | |
688 | } | |
689 | ||
690 | static int type_destroy(void *key, void *datum, void *p) | |
691 | { | |
692 | kfree(key); | |
693 | kfree(datum); | |
694 | return 0; | |
695 | } | |
696 | ||
697 | static int user_destroy(void *key, void *datum, void *p) | |
698 | { | |
699 | struct user_datum *usrdatum; | |
700 | ||
701 | kfree(key); | |
9398c7f7 EP |
702 | if (datum) { |
703 | usrdatum = datum; | |
704 | ebitmap_destroy(&usrdatum->roles); | |
705 | ebitmap_destroy(&usrdatum->range.level[0].cat); | |
706 | ebitmap_destroy(&usrdatum->range.level[1].cat); | |
707 | ebitmap_destroy(&usrdatum->dfltlevel.cat); | |
708 | } | |
1da177e4 LT |
709 | kfree(datum); |
710 | return 0; | |
711 | } | |
712 | ||
713 | static int sens_destroy(void *key, void *datum, void *p) | |
714 | { | |
715 | struct level_datum *levdatum; | |
716 | ||
717 | kfree(key); | |
9398c7f7 EP |
718 | if (datum) { |
719 | levdatum = datum; | |
720 | ebitmap_destroy(&levdatum->level->cat); | |
721 | kfree(levdatum->level); | |
722 | } | |
1da177e4 LT |
723 | kfree(datum); |
724 | return 0; | |
725 | } | |
726 | ||
727 | static int cat_destroy(void *key, void *datum, void *p) | |
728 | { | |
729 | kfree(key); | |
730 | kfree(datum); | |
731 | return 0; | |
732 | } | |
733 | ||
734 | static int (*destroy_f[SYM_NUM]) (void *key, void *datum, void *datap) = | |
735 | { | |
736 | common_destroy, | |
6cbda6b6 | 737 | cls_destroy, |
1da177e4 LT |
738 | role_destroy, |
739 | type_destroy, | |
740 | user_destroy, | |
741 | cond_destroy_bool, | |
742 | sens_destroy, | |
743 | cat_destroy, | |
744 | }; | |
745 | ||
2463c26d EP |
746 | static int filenametr_destroy(void *key, void *datum, void *p) |
747 | { | |
748 | struct filename_trans *ft = key; | |
749 | kfree(ft->name); | |
750 | kfree(key); | |
751 | kfree(datum); | |
752 | cond_resched(); | |
753 | return 0; | |
754 | } | |
755 | ||
2f3e82d6 SS |
756 | static int range_tr_destroy(void *key, void *datum, void *p) |
757 | { | |
758 | struct mls_range *rt = datum; | |
759 | kfree(key); | |
760 | ebitmap_destroy(&rt->level[0].cat); | |
761 | ebitmap_destroy(&rt->level[1].cat); | |
762 | kfree(datum); | |
763 | cond_resched(); | |
764 | return 0; | |
765 | } | |
766 | ||
1da177e4 LT |
767 | static void ocontext_destroy(struct ocontext *c, int i) |
768 | { | |
d1b43547 EP |
769 | if (!c) |
770 | return; | |
771 | ||
1da177e4 LT |
772 | context_destroy(&c->context[0]); |
773 | context_destroy(&c->context[1]); | |
774 | if (i == OCON_ISID || i == OCON_FS || | |
775 | i == OCON_NETIF || i == OCON_FSUSE) | |
776 | kfree(c->u.name); | |
777 | kfree(c); | |
778 | } | |
779 | ||
780 | /* | |
781 | * Free any memory allocated by a policy database structure. | |
782 | */ | |
783 | void policydb_destroy(struct policydb *p) | |
784 | { | |
785 | struct ocontext *c, *ctmp; | |
786 | struct genfs *g, *gtmp; | |
787 | int i; | |
782ebb99 SS |
788 | struct role_allow *ra, *lra = NULL; |
789 | struct role_trans *tr, *ltr = NULL; | |
1da177e4 LT |
790 | |
791 | for (i = 0; i < SYM_NUM; i++) { | |
9dc99780 | 792 | cond_resched(); |
1da177e4 LT |
793 | hashtab_map(p->symtab[i].table, destroy_f[i], NULL); |
794 | hashtab_destroy(p->symtab[i].table); | |
795 | } | |
796 | ||
ac76c05b EP |
797 | for (i = 0; i < SYM_NUM; i++) { |
798 | if (p->sym_val_to_name[i]) | |
799 | flex_array_free(p->sym_val_to_name[i]); | |
800 | } | |
1da177e4 | 801 | |
9a5f04bf JJ |
802 | kfree(p->class_val_to_struct); |
803 | kfree(p->role_val_to_struct); | |
804 | kfree(p->user_val_to_struct); | |
23bdecb0 EP |
805 | if (p->type_val_to_struct_array) |
806 | flex_array_free(p->type_val_to_struct_array); | |
1da177e4 LT |
807 | |
808 | avtab_destroy(&p->te_avtab); | |
809 | ||
810 | for (i = 0; i < OCON_NUM; i++) { | |
9dc99780 | 811 | cond_resched(); |
1da177e4 LT |
812 | c = p->ocontexts[i]; |
813 | while (c) { | |
814 | ctmp = c; | |
815 | c = c->next; | |
2ced3dfd | 816 | ocontext_destroy(ctmp, i); |
1da177e4 | 817 | } |
6e8c751e | 818 | p->ocontexts[i] = NULL; |
1da177e4 LT |
819 | } |
820 | ||
821 | g = p->genfs; | |
822 | while (g) { | |
9dc99780 | 823 | cond_resched(); |
1da177e4 LT |
824 | kfree(g->fstype); |
825 | c = g->head; | |
826 | while (c) { | |
827 | ctmp = c; | |
828 | c = c->next; | |
2ced3dfd | 829 | ocontext_destroy(ctmp, OCON_FSUSE); |
1da177e4 LT |
830 | } |
831 | gtmp = g; | |
832 | g = g->next; | |
833 | kfree(gtmp); | |
834 | } | |
6e8c751e | 835 | p->genfs = NULL; |
1da177e4 LT |
836 | |
837 | cond_policydb_destroy(p); | |
838 | ||
782ebb99 | 839 | for (tr = p->role_tr; tr; tr = tr->next) { |
9dc99780 | 840 | cond_resched(); |
a7f988ba | 841 | kfree(ltr); |
782ebb99 SS |
842 | ltr = tr; |
843 | } | |
a7f988ba | 844 | kfree(ltr); |
782ebb99 | 845 | |
2ced3dfd | 846 | for (ra = p->role_allow; ra; ra = ra->next) { |
9dc99780 | 847 | cond_resched(); |
a7f988ba | 848 | kfree(lra); |
782ebb99 SS |
849 | lra = ra; |
850 | } | |
a7f988ba | 851 | kfree(lra); |
782ebb99 | 852 | |
2463c26d EP |
853 | hashtab_map(p->filename_trans, filenametr_destroy, NULL); |
854 | hashtab_destroy(p->filename_trans); | |
855 | ||
2f3e82d6 SS |
856 | hashtab_map(p->range_tr, range_tr_destroy, NULL); |
857 | hashtab_destroy(p->range_tr); | |
782ebb99 | 858 | |
6371dcd3 EP |
859 | if (p->type_attr_map_array) { |
860 | for (i = 0; i < p->p_types.nprim; i++) { | |
861 | struct ebitmap *e; | |
862 | ||
863 | e = flex_array_get(p->type_attr_map_array, i); | |
864 | if (!e) | |
865 | continue; | |
866 | ebitmap_destroy(e); | |
867 | } | |
868 | flex_array_free(p->type_attr_map_array); | |
282c1f5e | 869 | } |
652bb9b0 | 870 | |
03a4c018 | 871 | ebitmap_destroy(&p->filename_trans_ttypes); |
3bb56b25 | 872 | ebitmap_destroy(&p->policycaps); |
64dbf074 | 873 | ebitmap_destroy(&p->permissive_map); |
3f12070e | 874 | |
1da177e4 LT |
875 | return; |
876 | } | |
877 | ||
878 | /* | |
879 | * Load the initial SIDs specified in a policy database | |
880 | * structure into a SID table. | |
881 | */ | |
882 | int policydb_load_isids(struct policydb *p, struct sidtab *s) | |
883 | { | |
884 | struct ocontext *head, *c; | |
885 | int rc; | |
886 | ||
887 | rc = sidtab_init(s); | |
888 | if (rc) { | |
454d972c | 889 | printk(KERN_ERR "SELinux: out of memory on SID table init\n"); |
1da177e4 LT |
890 | goto out; |
891 | } | |
892 | ||
893 | head = p->ocontexts[OCON_ISID]; | |
894 | for (c = head; c; c = c->next) { | |
9398c7f7 | 895 | rc = -EINVAL; |
1da177e4 | 896 | if (!c->context[0].user) { |
9398c7f7 EP |
897 | printk(KERN_ERR "SELinux: SID %s was never defined.\n", |
898 | c->u.name); | |
1da177e4 LT |
899 | goto out; |
900 | } | |
9398c7f7 EP |
901 | |
902 | rc = sidtab_insert(s, c->sid[0], &c->context[0]); | |
903 | if (rc) { | |
904 | printk(KERN_ERR "SELinux: unable to load initial SID %s.\n", | |
905 | c->u.name); | |
1da177e4 LT |
906 | goto out; |
907 | } | |
908 | } | |
9398c7f7 | 909 | rc = 0; |
1da177e4 LT |
910 | out: |
911 | return rc; | |
912 | } | |
913 | ||
45e5421e SS |
914 | int policydb_class_isvalid(struct policydb *p, unsigned int class) |
915 | { | |
916 | if (!class || class > p->p_classes.nprim) | |
917 | return 0; | |
918 | return 1; | |
919 | } | |
920 | ||
921 | int policydb_role_isvalid(struct policydb *p, unsigned int role) | |
922 | { | |
923 | if (!role || role > p->p_roles.nprim) | |
924 | return 0; | |
925 | return 1; | |
926 | } | |
927 | ||
928 | int policydb_type_isvalid(struct policydb *p, unsigned int type) | |
929 | { | |
930 | if (!type || type > p->p_types.nprim) | |
931 | return 0; | |
932 | return 1; | |
933 | } | |
934 | ||
1da177e4 LT |
935 | /* |
936 | * Return 1 if the fields in the security context | |
937 | * structure `c' are valid. Return 0 otherwise. | |
938 | */ | |
939 | int policydb_context_isvalid(struct policydb *p, struct context *c) | |
940 | { | |
941 | struct role_datum *role; | |
942 | struct user_datum *usrdatum; | |
943 | ||
944 | if (!c->role || c->role > p->p_roles.nprim) | |
945 | return 0; | |
946 | ||
947 | if (!c->user || c->user > p->p_users.nprim) | |
948 | return 0; | |
949 | ||
950 | if (!c->type || c->type > p->p_types.nprim) | |
951 | return 0; | |
952 | ||
953 | if (c->role != OBJECT_R_VAL) { | |
954 | /* | |
955 | * Role must be authorized for the type. | |
956 | */ | |
957 | role = p->role_val_to_struct[c->role - 1]; | |
9398c7f7 | 958 | if (!ebitmap_get_bit(&role->types, c->type - 1)) |
1da177e4 LT |
959 | /* role may not be associated with type */ |
960 | return 0; | |
961 | ||
962 | /* | |
963 | * User must be authorized for the role. | |
964 | */ | |
965 | usrdatum = p->user_val_to_struct[c->user - 1]; | |
966 | if (!usrdatum) | |
967 | return 0; | |
968 | ||
9398c7f7 | 969 | if (!ebitmap_get_bit(&usrdatum->roles, c->role - 1)) |
1da177e4 LT |
970 | /* user may not be associated with role */ |
971 | return 0; | |
972 | } | |
973 | ||
974 | if (!mls_context_isvalid(p, c)) | |
975 | return 0; | |
976 | ||
977 | return 1; | |
978 | } | |
979 | ||
980 | /* | |
981 | * Read a MLS range structure from a policydb binary | |
982 | * representation file. | |
983 | */ | |
984 | static int mls_read_range_helper(struct mls_range *r, void *fp) | |
985 | { | |
b5bf6c55 AD |
986 | __le32 buf[2]; |
987 | u32 items; | |
1da177e4 LT |
988 | int rc; |
989 | ||
990 | rc = next_entry(buf, fp, sizeof(u32)); | |
9398c7f7 | 991 | if (rc) |
1da177e4 LT |
992 | goto out; |
993 | ||
9398c7f7 | 994 | rc = -EINVAL; |
1da177e4 LT |
995 | items = le32_to_cpu(buf[0]); |
996 | if (items > ARRAY_SIZE(buf)) { | |
454d972c | 997 | printk(KERN_ERR "SELinux: mls: range overflow\n"); |
1da177e4 LT |
998 | goto out; |
999 | } | |
9398c7f7 | 1000 | |
1da177e4 | 1001 | rc = next_entry(buf, fp, sizeof(u32) * items); |
9398c7f7 | 1002 | if (rc) { |
454d972c | 1003 | printk(KERN_ERR "SELinux: mls: truncated range\n"); |
1da177e4 LT |
1004 | goto out; |
1005 | } | |
9398c7f7 | 1006 | |
1da177e4 LT |
1007 | r->level[0].sens = le32_to_cpu(buf[0]); |
1008 | if (items > 1) | |
1009 | r->level[1].sens = le32_to_cpu(buf[1]); | |
1010 | else | |
1011 | r->level[1].sens = r->level[0].sens; | |
1012 | ||
1013 | rc = ebitmap_read(&r->level[0].cat, fp); | |
1014 | if (rc) { | |
9398c7f7 | 1015 | printk(KERN_ERR "SELinux: mls: error reading low categories\n"); |
1da177e4 LT |
1016 | goto out; |
1017 | } | |
1018 | if (items > 1) { | |
1019 | rc = ebitmap_read(&r->level[1].cat, fp); | |
1020 | if (rc) { | |
9398c7f7 | 1021 | printk(KERN_ERR "SELinux: mls: error reading high categories\n"); |
1da177e4 LT |
1022 | goto bad_high; |
1023 | } | |
1024 | } else { | |
1025 | rc = ebitmap_cpy(&r->level[1].cat, &r->level[0].cat); | |
1026 | if (rc) { | |
454d972c | 1027 | printk(KERN_ERR "SELinux: mls: out of memory\n"); |
1da177e4 LT |
1028 | goto bad_high; |
1029 | } | |
1030 | } | |
1031 | ||
9398c7f7 | 1032 | return 0; |
1da177e4 LT |
1033 | bad_high: |
1034 | ebitmap_destroy(&r->level[0].cat); | |
9398c7f7 EP |
1035 | out: |
1036 | return rc; | |
1da177e4 LT |
1037 | } |
1038 | ||
1039 | /* | |
1040 | * Read and validate a security context structure | |
1041 | * from a policydb binary representation file. | |
1042 | */ | |
1043 | static int context_read_and_validate(struct context *c, | |
1044 | struct policydb *p, | |
1045 | void *fp) | |
1046 | { | |
b5bf6c55 | 1047 | __le32 buf[3]; |
1da177e4 LT |
1048 | int rc; |
1049 | ||
1050 | rc = next_entry(buf, fp, sizeof buf); | |
9398c7f7 | 1051 | if (rc) { |
454d972c | 1052 | printk(KERN_ERR "SELinux: context truncated\n"); |
1da177e4 LT |
1053 | goto out; |
1054 | } | |
1055 | c->user = le32_to_cpu(buf[0]); | |
1056 | c->role = le32_to_cpu(buf[1]); | |
1057 | c->type = le32_to_cpu(buf[2]); | |
1058 | if (p->policyvers >= POLICYDB_VERSION_MLS) { | |
9398c7f7 EP |
1059 | rc = mls_read_range_helper(&c->range, fp); |
1060 | if (rc) { | |
1061 | printk(KERN_ERR "SELinux: error reading MLS range of context\n"); | |
1da177e4 LT |
1062 | goto out; |
1063 | } | |
1064 | } | |
1065 | ||
9398c7f7 | 1066 | rc = -EINVAL; |
1da177e4 | 1067 | if (!policydb_context_isvalid(p, c)) { |
454d972c | 1068 | printk(KERN_ERR "SELinux: invalid security context\n"); |
1da177e4 | 1069 | context_destroy(c); |
9398c7f7 | 1070 | goto out; |
1da177e4 | 1071 | } |
9398c7f7 | 1072 | rc = 0; |
1da177e4 LT |
1073 | out: |
1074 | return rc; | |
1075 | } | |
1076 | ||
1077 | /* | |
1078 | * The following *_read functions are used to | |
1079 | * read the symbol data from a policy database | |
1080 | * binary representation file. | |
1081 | */ | |
1082 | ||
4b6f405f NK |
1083 | static int str_read(char **strp, gfp_t flags, void *fp, u32 len) |
1084 | { | |
1085 | int rc; | |
1086 | char *str; | |
1087 | ||
1088 | str = kmalloc(len + 1, flags); | |
1089 | if (!str) | |
1090 | return -ENOMEM; | |
1091 | ||
1092 | /* it's expected the caller should free the str */ | |
1093 | *strp = str; | |
1094 | ||
1095 | rc = next_entry(str, fp, len); | |
1096 | if (rc) | |
1097 | return rc; | |
1098 | ||
1099 | str[len] = '\0'; | |
1100 | return 0; | |
1101 | } | |
1102 | ||
1da177e4 LT |
1103 | static int perm_read(struct policydb *p, struct hashtab *h, void *fp) |
1104 | { | |
1105 | char *key = NULL; | |
1106 | struct perm_datum *perdatum; | |
1107 | int rc; | |
b5bf6c55 AD |
1108 | __le32 buf[2]; |
1109 | u32 len; | |
1da177e4 | 1110 | |
9398c7f7 | 1111 | rc = -ENOMEM; |
89d155ef | 1112 | perdatum = kzalloc(sizeof(*perdatum), GFP_KERNEL); |
9398c7f7 EP |
1113 | if (!perdatum) |
1114 | goto bad; | |
1da177e4 LT |
1115 | |
1116 | rc = next_entry(buf, fp, sizeof buf); | |
9398c7f7 | 1117 | if (rc) |
1da177e4 LT |
1118 | goto bad; |
1119 | ||
1120 | len = le32_to_cpu(buf[0]); | |
1121 | perdatum->value = le32_to_cpu(buf[1]); | |
1122 | ||
4b6f405f | 1123 | rc = str_read(&key, GFP_KERNEL, fp, len); |
9398c7f7 | 1124 | if (rc) |
1da177e4 | 1125 | goto bad; |
1da177e4 LT |
1126 | |
1127 | rc = hashtab_insert(h, key, perdatum); | |
1128 | if (rc) | |
1129 | goto bad; | |
9398c7f7 EP |
1130 | |
1131 | return 0; | |
1da177e4 LT |
1132 | bad: |
1133 | perm_destroy(key, perdatum, NULL); | |
9398c7f7 | 1134 | return rc; |
1da177e4 LT |
1135 | } |
1136 | ||
1137 | static int common_read(struct policydb *p, struct hashtab *h, void *fp) | |
1138 | { | |
1139 | char *key = NULL; | |
1140 | struct common_datum *comdatum; | |
b5bf6c55 AD |
1141 | __le32 buf[4]; |
1142 | u32 len, nel; | |
1da177e4 LT |
1143 | int i, rc; |
1144 | ||
9398c7f7 | 1145 | rc = -ENOMEM; |
89d155ef | 1146 | comdatum = kzalloc(sizeof(*comdatum), GFP_KERNEL); |
9398c7f7 EP |
1147 | if (!comdatum) |
1148 | goto bad; | |
1da177e4 LT |
1149 | |
1150 | rc = next_entry(buf, fp, sizeof buf); | |
9398c7f7 | 1151 | if (rc) |
1da177e4 LT |
1152 | goto bad; |
1153 | ||
1154 | len = le32_to_cpu(buf[0]); | |
1155 | comdatum->value = le32_to_cpu(buf[1]); | |
1156 | ||
1157 | rc = symtab_init(&comdatum->permissions, PERM_SYMTAB_SIZE); | |
1158 | if (rc) | |
1159 | goto bad; | |
1160 | comdatum->permissions.nprim = le32_to_cpu(buf[2]); | |
1161 | nel = le32_to_cpu(buf[3]); | |
1162 | ||
4b6f405f | 1163 | rc = str_read(&key, GFP_KERNEL, fp, len); |
9398c7f7 | 1164 | if (rc) |
1da177e4 | 1165 | goto bad; |
1da177e4 LT |
1166 | |
1167 | for (i = 0; i < nel; i++) { | |
1168 | rc = perm_read(p, comdatum->permissions.table, fp); | |
1169 | if (rc) | |
1170 | goto bad; | |
1171 | } | |
1172 | ||
1173 | rc = hashtab_insert(h, key, comdatum); | |
1174 | if (rc) | |
1175 | goto bad; | |
9398c7f7 | 1176 | return 0; |
1da177e4 LT |
1177 | bad: |
1178 | common_destroy(key, comdatum, NULL); | |
9398c7f7 | 1179 | return rc; |
1da177e4 LT |
1180 | } |
1181 | ||
a660bec1 RH |
1182 | static void type_set_init(struct type_set *t) |
1183 | { | |
1184 | ebitmap_init(&t->types); | |
1185 | ebitmap_init(&t->negset); | |
1186 | } | |
1187 | ||
1188 | static int type_set_read(struct type_set *t, void *fp) | |
1189 | { | |
1190 | __le32 buf[1]; | |
1191 | int rc; | |
1192 | ||
1193 | if (ebitmap_read(&t->types, fp)) | |
1194 | return -EINVAL; | |
1195 | if (ebitmap_read(&t->negset, fp)) | |
1196 | return -EINVAL; | |
1197 | ||
1198 | rc = next_entry(buf, fp, sizeof(u32)); | |
1199 | if (rc < 0) | |
1200 | return -EINVAL; | |
1201 | t->flags = le32_to_cpu(buf[0]); | |
1202 | ||
1203 | return 0; | |
1204 | } | |
1205 | ||
1206 | ||
1207 | static int read_cons_helper(struct policydb *p, | |
1208 | struct constraint_node **nodep, | |
1209 | int ncons, int allowxtarget, void *fp) | |
1da177e4 LT |
1210 | { |
1211 | struct constraint_node *c, *lc; | |
1212 | struct constraint_expr *e, *le; | |
b5bf6c55 AD |
1213 | __le32 buf[3]; |
1214 | u32 nexpr; | |
1da177e4 LT |
1215 | int rc, i, j, depth; |
1216 | ||
1217 | lc = NULL; | |
1218 | for (i = 0; i < ncons; i++) { | |
89d155ef | 1219 | c = kzalloc(sizeof(*c), GFP_KERNEL); |
1da177e4 LT |
1220 | if (!c) |
1221 | return -ENOMEM; | |
1da177e4 | 1222 | |
2ced3dfd | 1223 | if (lc) |
1da177e4 | 1224 | lc->next = c; |
2ced3dfd | 1225 | else |
1da177e4 | 1226 | *nodep = c; |
1da177e4 LT |
1227 | |
1228 | rc = next_entry(buf, fp, (sizeof(u32) * 2)); | |
9398c7f7 | 1229 | if (rc) |
1da177e4 LT |
1230 | return rc; |
1231 | c->permissions = le32_to_cpu(buf[0]); | |
1232 | nexpr = le32_to_cpu(buf[1]); | |
1233 | le = NULL; | |
1234 | depth = -1; | |
1235 | for (j = 0; j < nexpr; j++) { | |
89d155ef | 1236 | e = kzalloc(sizeof(*e), GFP_KERNEL); |
1da177e4 LT |
1237 | if (!e) |
1238 | return -ENOMEM; | |
1da177e4 | 1239 | |
2ced3dfd | 1240 | if (le) |
1da177e4 | 1241 | le->next = e; |
2ced3dfd | 1242 | else |
1da177e4 | 1243 | c->expr = e; |
1da177e4 LT |
1244 | |
1245 | rc = next_entry(buf, fp, (sizeof(u32) * 3)); | |
9398c7f7 | 1246 | if (rc) |
1da177e4 LT |
1247 | return rc; |
1248 | e->expr_type = le32_to_cpu(buf[0]); | |
1249 | e->attr = le32_to_cpu(buf[1]); | |
1250 | e->op = le32_to_cpu(buf[2]); | |
1251 | ||
1252 | switch (e->expr_type) { | |
1253 | case CEXPR_NOT: | |
1254 | if (depth < 0) | |
1255 | return -EINVAL; | |
1256 | break; | |
1257 | case CEXPR_AND: | |
1258 | case CEXPR_OR: | |
1259 | if (depth < 1) | |
1260 | return -EINVAL; | |
1261 | depth--; | |
1262 | break; | |
1263 | case CEXPR_ATTR: | |
1264 | if (depth == (CEXPR_MAXDEPTH - 1)) | |
1265 | return -EINVAL; | |
1266 | depth++; | |
1267 | break; | |
1268 | case CEXPR_NAMES: | |
1269 | if (!allowxtarget && (e->attr & CEXPR_XTARGET)) | |
1270 | return -EINVAL; | |
1271 | if (depth == (CEXPR_MAXDEPTH - 1)) | |
1272 | return -EINVAL; | |
1273 | depth++; | |
9398c7f7 EP |
1274 | rc = ebitmap_read(&e->names, fp); |
1275 | if (rc) | |
1276 | return rc; | |
a660bec1 RH |
1277 | if (p->policyvers >= |
1278 | POLICYDB_VERSION_CONSTRAINT_NAMES) { | |
1279 | e->type_names = kzalloc(sizeof | |
1280 | (*e->type_names), | |
1281 | GFP_KERNEL); | |
1282 | if (!e->type_names) | |
1283 | return -ENOMEM; | |
1284 | type_set_init(e->type_names); | |
1285 | rc = type_set_read(e->type_names, fp); | |
1286 | if (rc) | |
1287 | return rc; | |
1288 | } | |
1da177e4 LT |
1289 | break; |
1290 | default: | |
1291 | return -EINVAL; | |
1292 | } | |
1293 | le = e; | |
1294 | } | |
1295 | if (depth != 0) | |
1296 | return -EINVAL; | |
1297 | lc = c; | |
1298 | } | |
1299 | ||
1300 | return 0; | |
1301 | } | |
1302 | ||
1303 | static int class_read(struct policydb *p, struct hashtab *h, void *fp) | |
1304 | { | |
1305 | char *key = NULL; | |
1306 | struct class_datum *cladatum; | |
b5bf6c55 AD |
1307 | __le32 buf[6]; |
1308 | u32 len, len2, ncons, nel; | |
1da177e4 LT |
1309 | int i, rc; |
1310 | ||
9398c7f7 | 1311 | rc = -ENOMEM; |
89d155ef | 1312 | cladatum = kzalloc(sizeof(*cladatum), GFP_KERNEL); |
9398c7f7 EP |
1313 | if (!cladatum) |
1314 | goto bad; | |
1da177e4 LT |
1315 | |
1316 | rc = next_entry(buf, fp, sizeof(u32)*6); | |
9398c7f7 | 1317 | if (rc) |
1da177e4 LT |
1318 | goto bad; |
1319 | ||
1320 | len = le32_to_cpu(buf[0]); | |
1321 | len2 = le32_to_cpu(buf[1]); | |
1322 | cladatum->value = le32_to_cpu(buf[2]); | |
1323 | ||
1324 | rc = symtab_init(&cladatum->permissions, PERM_SYMTAB_SIZE); | |
1325 | if (rc) | |
1326 | goto bad; | |
1327 | cladatum->permissions.nprim = le32_to_cpu(buf[3]); | |
1328 | nel = le32_to_cpu(buf[4]); | |
1329 | ||
1330 | ncons = le32_to_cpu(buf[5]); | |
1331 | ||
4b6f405f | 1332 | rc = str_read(&key, GFP_KERNEL, fp, len); |
9398c7f7 | 1333 | if (rc) |
1da177e4 | 1334 | goto bad; |
1da177e4 LT |
1335 | |
1336 | if (len2) { | |
4b6f405f | 1337 | rc = str_read(&cladatum->comkey, GFP_KERNEL, fp, len2); |
9398c7f7 | 1338 | if (rc) |
1da177e4 | 1339 | goto bad; |
1da177e4 | 1340 | |
9398c7f7 EP |
1341 | rc = -EINVAL; |
1342 | cladatum->comdatum = hashtab_search(p->p_commons.table, cladatum->comkey); | |
1da177e4 | 1343 | if (!cladatum->comdatum) { |
9398c7f7 | 1344 | printk(KERN_ERR "SELinux: unknown common %s\n", cladatum->comkey); |
1da177e4 LT |
1345 | goto bad; |
1346 | } | |
1347 | } | |
1348 | for (i = 0; i < nel; i++) { | |
1349 | rc = perm_read(p, cladatum->permissions.table, fp); | |
1350 | if (rc) | |
1351 | goto bad; | |
1352 | } | |
1353 | ||
a660bec1 | 1354 | rc = read_cons_helper(p, &cladatum->constraints, ncons, 0, fp); |
1da177e4 LT |
1355 | if (rc) |
1356 | goto bad; | |
1357 | ||
1358 | if (p->policyvers >= POLICYDB_VERSION_VALIDATETRANS) { | |
1359 | /* grab the validatetrans rules */ | |
1360 | rc = next_entry(buf, fp, sizeof(u32)); | |
9398c7f7 | 1361 | if (rc) |
1da177e4 LT |
1362 | goto bad; |
1363 | ncons = le32_to_cpu(buf[0]); | |
a660bec1 RH |
1364 | rc = read_cons_helper(p, &cladatum->validatetrans, |
1365 | ncons, 1, fp); | |
1da177e4 LT |
1366 | if (rc) |
1367 | goto bad; | |
1368 | } | |
1369 | ||
aa893269 EP |
1370 | if (p->policyvers >= POLICYDB_VERSION_NEW_OBJECT_DEFAULTS) { |
1371 | rc = next_entry(buf, fp, sizeof(u32) * 3); | |
1372 | if (rc) | |
1373 | goto bad; | |
1374 | ||
1375 | cladatum->default_user = le32_to_cpu(buf[0]); | |
1376 | cladatum->default_role = le32_to_cpu(buf[1]); | |
1377 | cladatum->default_range = le32_to_cpu(buf[2]); | |
1378 | } | |
1379 | ||
eed7795d EP |
1380 | if (p->policyvers >= POLICYDB_VERSION_DEFAULT_TYPE) { |
1381 | rc = next_entry(buf, fp, sizeof(u32) * 1); | |
1382 | if (rc) | |
1383 | goto bad; | |
1384 | cladatum->default_type = le32_to_cpu(buf[0]); | |
1385 | } | |
1386 | ||
1da177e4 LT |
1387 | rc = hashtab_insert(h, key, cladatum); |
1388 | if (rc) | |
1389 | goto bad; | |
1390 | ||
9398c7f7 | 1391 | return 0; |
1da177e4 | 1392 | bad: |
6cbda6b6 | 1393 | cls_destroy(key, cladatum, NULL); |
9398c7f7 | 1394 | return rc; |
1da177e4 LT |
1395 | } |
1396 | ||
1397 | static int role_read(struct policydb *p, struct hashtab *h, void *fp) | |
1398 | { | |
1399 | char *key = NULL; | |
1400 | struct role_datum *role; | |
d9250dea KK |
1401 | int rc, to_read = 2; |
1402 | __le32 buf[3]; | |
b5bf6c55 | 1403 | u32 len; |
1da177e4 | 1404 | |
9398c7f7 | 1405 | rc = -ENOMEM; |
89d155ef | 1406 | role = kzalloc(sizeof(*role), GFP_KERNEL); |
9398c7f7 EP |
1407 | if (!role) |
1408 | goto bad; | |
1da177e4 | 1409 | |
d9250dea KK |
1410 | if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) |
1411 | to_read = 3; | |
1412 | ||
1413 | rc = next_entry(buf, fp, sizeof(buf[0]) * to_read); | |
9398c7f7 | 1414 | if (rc) |
1da177e4 LT |
1415 | goto bad; |
1416 | ||
1417 | len = le32_to_cpu(buf[0]); | |
1418 | role->value = le32_to_cpu(buf[1]); | |
d9250dea KK |
1419 | if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) |
1420 | role->bounds = le32_to_cpu(buf[2]); | |
1da177e4 | 1421 | |
4b6f405f | 1422 | rc = str_read(&key, GFP_KERNEL, fp, len); |
9398c7f7 | 1423 | if (rc) |
1da177e4 | 1424 | goto bad; |
1da177e4 LT |
1425 | |
1426 | rc = ebitmap_read(&role->dominates, fp); | |
1427 | if (rc) | |
1428 | goto bad; | |
1429 | ||
1430 | rc = ebitmap_read(&role->types, fp); | |
1431 | if (rc) | |
1432 | goto bad; | |
1433 | ||
1434 | if (strcmp(key, OBJECT_R) == 0) { | |
9398c7f7 | 1435 | rc = -EINVAL; |
1da177e4 | 1436 | if (role->value != OBJECT_R_VAL) { |
744ba35e | 1437 | printk(KERN_ERR "SELinux: Role %s has wrong value %d\n", |
1da177e4 | 1438 | OBJECT_R, role->value); |
1da177e4 LT |
1439 | goto bad; |
1440 | } | |
1441 | rc = 0; | |
1442 | goto bad; | |
1443 | } | |
1444 | ||
1445 | rc = hashtab_insert(h, key, role); | |
1446 | if (rc) | |
1447 | goto bad; | |
9398c7f7 | 1448 | return 0; |
1da177e4 LT |
1449 | bad: |
1450 | role_destroy(key, role, NULL); | |
9398c7f7 | 1451 | return rc; |
1da177e4 LT |
1452 | } |
1453 | ||
1454 | static int type_read(struct policydb *p, struct hashtab *h, void *fp) | |
1455 | { | |
1456 | char *key = NULL; | |
1457 | struct type_datum *typdatum; | |
d9250dea KK |
1458 | int rc, to_read = 3; |
1459 | __le32 buf[4]; | |
b5bf6c55 | 1460 | u32 len; |
1da177e4 | 1461 | |
9398c7f7 | 1462 | rc = -ENOMEM; |
2ced3dfd | 1463 | typdatum = kzalloc(sizeof(*typdatum), GFP_KERNEL); |
9398c7f7 EP |
1464 | if (!typdatum) |
1465 | goto bad; | |
1da177e4 | 1466 | |
d9250dea KK |
1467 | if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) |
1468 | to_read = 4; | |
1469 | ||
1470 | rc = next_entry(buf, fp, sizeof(buf[0]) * to_read); | |
9398c7f7 | 1471 | if (rc) |
1da177e4 LT |
1472 | goto bad; |
1473 | ||
1474 | len = le32_to_cpu(buf[0]); | |
1475 | typdatum->value = le32_to_cpu(buf[1]); | |
d9250dea KK |
1476 | if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) { |
1477 | u32 prop = le32_to_cpu(buf[2]); | |
1478 | ||
1479 | if (prop & TYPEDATUM_PROPERTY_PRIMARY) | |
1480 | typdatum->primary = 1; | |
1481 | if (prop & TYPEDATUM_PROPERTY_ATTRIBUTE) | |
1482 | typdatum->attribute = 1; | |
1483 | ||
1484 | typdatum->bounds = le32_to_cpu(buf[3]); | |
1485 | } else { | |
1486 | typdatum->primary = le32_to_cpu(buf[2]); | |
1487 | } | |
1da177e4 | 1488 | |
4b6f405f | 1489 | rc = str_read(&key, GFP_KERNEL, fp, len); |
9398c7f7 | 1490 | if (rc) |
1da177e4 | 1491 | goto bad; |
1da177e4 LT |
1492 | |
1493 | rc = hashtab_insert(h, key, typdatum); | |
1494 | if (rc) | |
1495 | goto bad; | |
9398c7f7 | 1496 | return 0; |
1da177e4 LT |
1497 | bad: |
1498 | type_destroy(key, typdatum, NULL); | |
9398c7f7 | 1499 | return rc; |
1da177e4 LT |
1500 | } |
1501 | ||
1502 | ||
1503 | /* | |
1504 | * Read a MLS level structure from a policydb binary | |
1505 | * representation file. | |
1506 | */ | |
1507 | static int mls_read_level(struct mls_level *lp, void *fp) | |
1508 | { | |
b5bf6c55 | 1509 | __le32 buf[1]; |
1da177e4 LT |
1510 | int rc; |
1511 | ||
1512 | memset(lp, 0, sizeof(*lp)); | |
1513 | ||
1514 | rc = next_entry(buf, fp, sizeof buf); | |
9398c7f7 | 1515 | if (rc) { |
454d972c | 1516 | printk(KERN_ERR "SELinux: mls: truncated level\n"); |
9398c7f7 | 1517 | return rc; |
1da177e4 LT |
1518 | } |
1519 | lp->sens = le32_to_cpu(buf[0]); | |
1520 | ||
9398c7f7 EP |
1521 | rc = ebitmap_read(&lp->cat, fp); |
1522 | if (rc) { | |
1523 | printk(KERN_ERR "SELinux: mls: error reading level categories\n"); | |
1524 | return rc; | |
1da177e4 LT |
1525 | } |
1526 | return 0; | |
1da177e4 LT |
1527 | } |
1528 | ||
1529 | static int user_read(struct policydb *p, struct hashtab *h, void *fp) | |
1530 | { | |
1531 | char *key = NULL; | |
1532 | struct user_datum *usrdatum; | |
d9250dea KK |
1533 | int rc, to_read = 2; |
1534 | __le32 buf[3]; | |
b5bf6c55 | 1535 | u32 len; |
1da177e4 | 1536 | |
9398c7f7 | 1537 | rc = -ENOMEM; |
89d155ef | 1538 | usrdatum = kzalloc(sizeof(*usrdatum), GFP_KERNEL); |
9398c7f7 EP |
1539 | if (!usrdatum) |
1540 | goto bad; | |
1da177e4 | 1541 | |
d9250dea KK |
1542 | if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) |
1543 | to_read = 3; | |
1544 | ||
1545 | rc = next_entry(buf, fp, sizeof(buf[0]) * to_read); | |
9398c7f7 | 1546 | if (rc) |
1da177e4 LT |
1547 | goto bad; |
1548 | ||
1549 | len = le32_to_cpu(buf[0]); | |
1550 | usrdatum->value = le32_to_cpu(buf[1]); | |
d9250dea KK |
1551 | if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) |
1552 | usrdatum->bounds = le32_to_cpu(buf[2]); | |
1da177e4 | 1553 | |
4b6f405f | 1554 | rc = str_read(&key, GFP_KERNEL, fp, len); |
9398c7f7 | 1555 | if (rc) |
1da177e4 | 1556 | goto bad; |
1da177e4 LT |
1557 | |
1558 | rc = ebitmap_read(&usrdatum->roles, fp); | |
1559 | if (rc) | |
1560 | goto bad; | |
1561 | ||
1562 | if (p->policyvers >= POLICYDB_VERSION_MLS) { | |
1563 | rc = mls_read_range_helper(&usrdatum->range, fp); | |
1564 | if (rc) | |
1565 | goto bad; | |
1566 | rc = mls_read_level(&usrdatum->dfltlevel, fp); | |
1567 | if (rc) | |
1568 | goto bad; | |
1569 | } | |
1570 | ||
1571 | rc = hashtab_insert(h, key, usrdatum); | |
1572 | if (rc) | |
1573 | goto bad; | |
9398c7f7 | 1574 | return 0; |
1da177e4 LT |
1575 | bad: |
1576 | user_destroy(key, usrdatum, NULL); | |
9398c7f7 | 1577 | return rc; |
1da177e4 LT |
1578 | } |
1579 | ||
1580 | static int sens_read(struct policydb *p, struct hashtab *h, void *fp) | |
1581 | { | |
1582 | char *key = NULL; | |
1583 | struct level_datum *levdatum; | |
1584 | int rc; | |
b5bf6c55 AD |
1585 | __le32 buf[2]; |
1586 | u32 len; | |
1da177e4 | 1587 | |
9398c7f7 | 1588 | rc = -ENOMEM; |
89d155ef | 1589 | levdatum = kzalloc(sizeof(*levdatum), GFP_ATOMIC); |
9398c7f7 EP |
1590 | if (!levdatum) |
1591 | goto bad; | |
1da177e4 LT |
1592 | |
1593 | rc = next_entry(buf, fp, sizeof buf); | |
9398c7f7 | 1594 | if (rc) |
1da177e4 LT |
1595 | goto bad; |
1596 | ||
1597 | len = le32_to_cpu(buf[0]); | |
1598 | levdatum->isalias = le32_to_cpu(buf[1]); | |
1599 | ||
4b6f405f | 1600 | rc = str_read(&key, GFP_ATOMIC, fp, len); |
9398c7f7 | 1601 | if (rc) |
1da177e4 | 1602 | goto bad; |
1da177e4 | 1603 | |
9398c7f7 | 1604 | rc = -ENOMEM; |
1da177e4 | 1605 | levdatum->level = kmalloc(sizeof(struct mls_level), GFP_ATOMIC); |
9398c7f7 | 1606 | if (!levdatum->level) |
1da177e4 | 1607 | goto bad; |
9398c7f7 EP |
1608 | |
1609 | rc = mls_read_level(levdatum->level, fp); | |
1610 | if (rc) | |
1da177e4 | 1611 | goto bad; |
1da177e4 LT |
1612 | |
1613 | rc = hashtab_insert(h, key, levdatum); | |
1614 | if (rc) | |
1615 | goto bad; | |
9398c7f7 | 1616 | return 0; |
1da177e4 LT |
1617 | bad: |
1618 | sens_destroy(key, levdatum, NULL); | |
9398c7f7 | 1619 | return rc; |
1da177e4 LT |
1620 | } |
1621 | ||
1622 | static int cat_read(struct policydb *p, struct hashtab *h, void *fp) | |
1623 | { | |
1624 | char *key = NULL; | |
1625 | struct cat_datum *catdatum; | |
1626 | int rc; | |
b5bf6c55 AD |
1627 | __le32 buf[3]; |
1628 | u32 len; | |
1da177e4 | 1629 | |
9398c7f7 | 1630 | rc = -ENOMEM; |
89d155ef | 1631 | catdatum = kzalloc(sizeof(*catdatum), GFP_ATOMIC); |
9398c7f7 EP |
1632 | if (!catdatum) |
1633 | goto bad; | |
1da177e4 LT |
1634 | |
1635 | rc = next_entry(buf, fp, sizeof buf); | |
9398c7f7 | 1636 | if (rc) |
1da177e4 LT |
1637 | goto bad; |
1638 | ||
1639 | len = le32_to_cpu(buf[0]); | |
1640 | catdatum->value = le32_to_cpu(buf[1]); | |
1641 | catdatum->isalias = le32_to_cpu(buf[2]); | |
1642 | ||
4b6f405f | 1643 | rc = str_read(&key, GFP_ATOMIC, fp, len); |
9398c7f7 | 1644 | if (rc) |
1da177e4 | 1645 | goto bad; |
1da177e4 LT |
1646 | |
1647 | rc = hashtab_insert(h, key, catdatum); | |
1648 | if (rc) | |
1649 | goto bad; | |
9398c7f7 | 1650 | return 0; |
1da177e4 LT |
1651 | bad: |
1652 | cat_destroy(key, catdatum, NULL); | |
9398c7f7 | 1653 | return rc; |
1da177e4 LT |
1654 | } |
1655 | ||
1656 | static int (*read_f[SYM_NUM]) (struct policydb *p, struct hashtab *h, void *fp) = | |
1657 | { | |
1658 | common_read, | |
1659 | class_read, | |
1660 | role_read, | |
1661 | type_read, | |
1662 | user_read, | |
1663 | cond_read_bool, | |
1664 | sens_read, | |
1665 | cat_read, | |
1666 | }; | |
1667 | ||
d9250dea KK |
1668 | static int user_bounds_sanity_check(void *key, void *datum, void *datap) |
1669 | { | |
1670 | struct user_datum *upper, *user; | |
1671 | struct policydb *p = datap; | |
1672 | int depth = 0; | |
1673 | ||
1674 | upper = user = datum; | |
1675 | while (upper->bounds) { | |
1676 | struct ebitmap_node *node; | |
1677 | unsigned long bit; | |
1678 | ||
1679 | if (++depth == POLICYDB_BOUNDS_MAXDEPTH) { | |
1680 | printk(KERN_ERR "SELinux: user %s: " | |
1681 | "too deep or looped boundary", | |
1682 | (char *) key); | |
1683 | return -EINVAL; | |
1684 | } | |
1685 | ||
1686 | upper = p->user_val_to_struct[upper->bounds - 1]; | |
1687 | ebitmap_for_each_positive_bit(&user->roles, node, bit) { | |
1688 | if (ebitmap_get_bit(&upper->roles, bit)) | |
1689 | continue; | |
1690 | ||
1691 | printk(KERN_ERR | |
1692 | "SELinux: boundary violated policy: " | |
1693 | "user=%s role=%s bounds=%s\n", | |
ac76c05b EP |
1694 | sym_name(p, SYM_USERS, user->value - 1), |
1695 | sym_name(p, SYM_ROLES, bit), | |
1696 | sym_name(p, SYM_USERS, upper->value - 1)); | |
d9250dea KK |
1697 | |
1698 | return -EINVAL; | |
1699 | } | |
1700 | } | |
1701 | ||
1702 | return 0; | |
1703 | } | |
1704 | ||
1705 | static int role_bounds_sanity_check(void *key, void *datum, void *datap) | |
1706 | { | |
1707 | struct role_datum *upper, *role; | |
1708 | struct policydb *p = datap; | |
1709 | int depth = 0; | |
1710 | ||
1711 | upper = role = datum; | |
1712 | while (upper->bounds) { | |
1713 | struct ebitmap_node *node; | |
1714 | unsigned long bit; | |
1715 | ||
1716 | if (++depth == POLICYDB_BOUNDS_MAXDEPTH) { | |
1717 | printk(KERN_ERR "SELinux: role %s: " | |
1718 | "too deep or looped bounds\n", | |
1719 | (char *) key); | |
1720 | return -EINVAL; | |
1721 | } | |
1722 | ||
1723 | upper = p->role_val_to_struct[upper->bounds - 1]; | |
1724 | ebitmap_for_each_positive_bit(&role->types, node, bit) { | |
1725 | if (ebitmap_get_bit(&upper->types, bit)) | |
1726 | continue; | |
1727 | ||
1728 | printk(KERN_ERR | |
1729 | "SELinux: boundary violated policy: " | |
1730 | "role=%s type=%s bounds=%s\n", | |
ac76c05b EP |
1731 | sym_name(p, SYM_ROLES, role->value - 1), |
1732 | sym_name(p, SYM_TYPES, bit), | |
1733 | sym_name(p, SYM_ROLES, upper->value - 1)); | |
d9250dea KK |
1734 | |
1735 | return -EINVAL; | |
1736 | } | |
1737 | } | |
1738 | ||
1739 | return 0; | |
1740 | } | |
1741 | ||
1742 | static int type_bounds_sanity_check(void *key, void *datum, void *datap) | |
1743 | { | |
daa6d83a | 1744 | struct type_datum *upper; |
d9250dea KK |
1745 | struct policydb *p = datap; |
1746 | int depth = 0; | |
1747 | ||
daa6d83a | 1748 | upper = datum; |
d9250dea KK |
1749 | while (upper->bounds) { |
1750 | if (++depth == POLICYDB_BOUNDS_MAXDEPTH) { | |
1751 | printk(KERN_ERR "SELinux: type %s: " | |
1752 | "too deep or looped boundary\n", | |
1753 | (char *) key); | |
1754 | return -EINVAL; | |
1755 | } | |
1756 | ||
23bdecb0 EP |
1757 | upper = flex_array_get_ptr(p->type_val_to_struct_array, |
1758 | upper->bounds - 1); | |
1759 | BUG_ON(!upper); | |
1760 | ||
d9250dea KK |
1761 | if (upper->attribute) { |
1762 | printk(KERN_ERR "SELinux: type %s: " | |
1763 | "bounded by attribute %s", | |
1764 | (char *) key, | |
ac76c05b | 1765 | sym_name(p, SYM_TYPES, upper->value - 1)); |
d9250dea KK |
1766 | return -EINVAL; |
1767 | } | |
1768 | } | |
1769 | ||
1770 | return 0; | |
1771 | } | |
1772 | ||
1773 | static int policydb_bounds_sanity_check(struct policydb *p) | |
1774 | { | |
1775 | int rc; | |
1776 | ||
1777 | if (p->policyvers < POLICYDB_VERSION_BOUNDARY) | |
1778 | return 0; | |
1779 | ||
1780 | rc = hashtab_map(p->p_users.table, | |
1781 | user_bounds_sanity_check, p); | |
1782 | if (rc) | |
1783 | return rc; | |
1784 | ||
1785 | rc = hashtab_map(p->p_roles.table, | |
1786 | role_bounds_sanity_check, p); | |
1787 | if (rc) | |
1788 | return rc; | |
1789 | ||
1790 | rc = hashtab_map(p->p_types.table, | |
1791 | type_bounds_sanity_check, p); | |
1792 | if (rc) | |
1793 | return rc; | |
1794 | ||
1795 | return 0; | |
1796 | } | |
1797 | ||
c6d3aaa4 SS |
1798 | u16 string_to_security_class(struct policydb *p, const char *name) |
1799 | { | |
1800 | struct class_datum *cladatum; | |
1801 | ||
1802 | cladatum = hashtab_search(p->p_classes.table, name); | |
1803 | if (!cladatum) | |
1804 | return 0; | |
1805 | ||
1806 | return cladatum->value; | |
1807 | } | |
1808 | ||
1809 | u32 string_to_av_perm(struct policydb *p, u16 tclass, const char *name) | |
1810 | { | |
1811 | struct class_datum *cladatum; | |
1812 | struct perm_datum *perdatum = NULL; | |
1813 | struct common_datum *comdatum; | |
1814 | ||
1815 | if (!tclass || tclass > p->p_classes.nprim) | |
1816 | return 0; | |
1817 | ||
1818 | cladatum = p->class_val_to_struct[tclass-1]; | |
1819 | comdatum = cladatum->comdatum; | |
1820 | if (comdatum) | |
1821 | perdatum = hashtab_search(comdatum->permissions.table, | |
1822 | name); | |
1823 | if (!perdatum) | |
1824 | perdatum = hashtab_search(cladatum->permissions.table, | |
1825 | name); | |
1826 | if (!perdatum) | |
1827 | return 0; | |
1828 | ||
1829 | return 1U << (perdatum->value-1); | |
1830 | } | |
1831 | ||
9ee0c823 EP |
1832 | static int range_read(struct policydb *p, void *fp) |
1833 | { | |
1834 | struct range_trans *rt = NULL; | |
1835 | struct mls_range *r = NULL; | |
1836 | int i, rc; | |
1837 | __le32 buf[2]; | |
1838 | u32 nel; | |
1839 | ||
1840 | if (p->policyvers < POLICYDB_VERSION_MLS) | |
1841 | return 0; | |
1842 | ||
1843 | rc = next_entry(buf, fp, sizeof(u32)); | |
1844 | if (rc) | |
1845 | goto out; | |
1846 | ||
1847 | nel = le32_to_cpu(buf[0]); | |
1848 | for (i = 0; i < nel; i++) { | |
1849 | rc = -ENOMEM; | |
1850 | rt = kzalloc(sizeof(*rt), GFP_KERNEL); | |
1851 | if (!rt) | |
1852 | goto out; | |
1853 | ||
1854 | rc = next_entry(buf, fp, (sizeof(u32) * 2)); | |
1855 | if (rc) | |
1856 | goto out; | |
1857 | ||
1858 | rt->source_type = le32_to_cpu(buf[0]); | |
1859 | rt->target_type = le32_to_cpu(buf[1]); | |
1860 | if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) { | |
1861 | rc = next_entry(buf, fp, sizeof(u32)); | |
1862 | if (rc) | |
1863 | goto out; | |
1864 | rt->target_class = le32_to_cpu(buf[0]); | |
1865 | } else | |
1866 | rt->target_class = p->process_class; | |
1867 | ||
1868 | rc = -EINVAL; | |
1869 | if (!policydb_type_isvalid(p, rt->source_type) || | |
1870 | !policydb_type_isvalid(p, rt->target_type) || | |
1871 | !policydb_class_isvalid(p, rt->target_class)) | |
1872 | goto out; | |
1873 | ||
1874 | rc = -ENOMEM; | |
1875 | r = kzalloc(sizeof(*r), GFP_KERNEL); | |
1876 | if (!r) | |
1877 | goto out; | |
1878 | ||
1879 | rc = mls_read_range_helper(r, fp); | |
1880 | if (rc) | |
1881 | goto out; | |
1882 | ||
1883 | rc = -EINVAL; | |
1884 | if (!mls_range_isvalid(p, r)) { | |
1885 | printk(KERN_WARNING "SELinux: rangetrans: invalid range\n"); | |
1886 | goto out; | |
1887 | } | |
1888 | ||
1889 | rc = hashtab_insert(p->range_tr, rt, r); | |
1890 | if (rc) | |
1891 | goto out; | |
1892 | ||
1893 | rt = NULL; | |
1894 | r = NULL; | |
1895 | } | |
be30b16d | 1896 | hash_eval(p->range_tr, "rangetr"); |
9ee0c823 EP |
1897 | rc = 0; |
1898 | out: | |
1899 | kfree(rt); | |
1900 | kfree(r); | |
1901 | return rc; | |
1902 | } | |
1903 | ||
652bb9b0 EP |
1904 | static int filename_trans_read(struct policydb *p, void *fp) |
1905 | { | |
2463c26d EP |
1906 | struct filename_trans *ft; |
1907 | struct filename_trans_datum *otype; | |
652bb9b0 | 1908 | char *name; |
2463c26d | 1909 | u32 nel, len; |
652bb9b0 EP |
1910 | __le32 buf[4]; |
1911 | int rc, i; | |
1912 | ||
1913 | if (p->policyvers < POLICYDB_VERSION_FILENAME_TRANS) | |
1914 | return 0; | |
1915 | ||
1916 | rc = next_entry(buf, fp, sizeof(u32)); | |
1917 | if (rc) | |
2463c26d | 1918 | return rc; |
652bb9b0 EP |
1919 | nel = le32_to_cpu(buf[0]); |
1920 | ||
652bb9b0 | 1921 | for (i = 0; i < nel; i++) { |
2463c26d EP |
1922 | ft = NULL; |
1923 | otype = NULL; | |
1924 | name = NULL; | |
1925 | ||
652bb9b0 EP |
1926 | rc = -ENOMEM; |
1927 | ft = kzalloc(sizeof(*ft), GFP_KERNEL); | |
1928 | if (!ft) | |
1929 | goto out; | |
1930 | ||
2463c26d EP |
1931 | rc = -ENOMEM; |
1932 | otype = kmalloc(sizeof(*otype), GFP_KERNEL); | |
1933 | if (!otype) | |
1934 | goto out; | |
652bb9b0 EP |
1935 | |
1936 | /* length of the path component string */ | |
1937 | rc = next_entry(buf, fp, sizeof(u32)); | |
1938 | if (rc) | |
1939 | goto out; | |
1940 | len = le32_to_cpu(buf[0]); | |
1941 | ||
652bb9b0 | 1942 | /* path component string */ |
4b6f405f | 1943 | rc = str_read(&name, GFP_KERNEL, fp, len); |
652bb9b0 EP |
1944 | if (rc) |
1945 | goto out; | |
4b6f405f NK |
1946 | |
1947 | ft->name = name; | |
652bb9b0 | 1948 | |
652bb9b0 EP |
1949 | rc = next_entry(buf, fp, sizeof(u32) * 4); |
1950 | if (rc) | |
1951 | goto out; | |
1952 | ||
1953 | ft->stype = le32_to_cpu(buf[0]); | |
1954 | ft->ttype = le32_to_cpu(buf[1]); | |
1955 | ft->tclass = le32_to_cpu(buf[2]); | |
2463c26d EP |
1956 | |
1957 | otype->otype = le32_to_cpu(buf[3]); | |
03a4c018 EP |
1958 | |
1959 | rc = ebitmap_set_bit(&p->filename_trans_ttypes, ft->ttype, 1); | |
1960 | if (rc) | |
1961 | goto out; | |
2463c26d | 1962 | |
8ed81460 TH |
1963 | rc = hashtab_insert(p->filename_trans, ft, otype); |
1964 | if (rc) { | |
1965 | /* | |
1966 | * Do not return -EEXIST to the caller, or the system | |
1967 | * will not boot. | |
1968 | */ | |
1969 | if (rc != -EEXIST) | |
1970 | goto out; | |
1971 | /* But free memory to avoid memory leak. */ | |
1972 | kfree(ft); | |
1973 | kfree(name); | |
1974 | kfree(otype); | |
1975 | } | |
652bb9b0 | 1976 | } |
2463c26d EP |
1977 | hash_eval(p->filename_trans, "filenametr"); |
1978 | return 0; | |
652bb9b0 | 1979 | out: |
2463c26d EP |
1980 | kfree(ft); |
1981 | kfree(name); | |
1982 | kfree(otype); | |
1983 | ||
652bb9b0 EP |
1984 | return rc; |
1985 | } | |
1986 | ||
d1b43547 EP |
1987 | static int genfs_read(struct policydb *p, void *fp) |
1988 | { | |
1989 | int i, j, rc; | |
1990 | u32 nel, nel2, len, len2; | |
1991 | __le32 buf[1]; | |
1992 | struct ocontext *l, *c; | |
1993 | struct ocontext *newc = NULL; | |
1994 | struct genfs *genfs_p, *genfs; | |
1995 | struct genfs *newgenfs = NULL; | |
1996 | ||
1997 | rc = next_entry(buf, fp, sizeof(u32)); | |
1998 | if (rc) | |
1999 | goto out; | |
2000 | nel = le32_to_cpu(buf[0]); | |
2001 | ||
2002 | for (i = 0; i < nel; i++) { | |
2003 | rc = next_entry(buf, fp, sizeof(u32)); | |
2004 | if (rc) | |
2005 | goto out; | |
2006 | len = le32_to_cpu(buf[0]); | |
2007 | ||
2008 | rc = -ENOMEM; | |
2009 | newgenfs = kzalloc(sizeof(*newgenfs), GFP_KERNEL); | |
2010 | if (!newgenfs) | |
2011 | goto out; | |
2012 | ||
4b6f405f | 2013 | rc = str_read(&newgenfs->fstype, GFP_KERNEL, fp, len); |
d1b43547 EP |
2014 | if (rc) |
2015 | goto out; | |
2016 | ||
d1b43547 EP |
2017 | for (genfs_p = NULL, genfs = p->genfs; genfs; |
2018 | genfs_p = genfs, genfs = genfs->next) { | |
2019 | rc = -EINVAL; | |
2020 | if (strcmp(newgenfs->fstype, genfs->fstype) == 0) { | |
2021 | printk(KERN_ERR "SELinux: dup genfs fstype %s\n", | |
2022 | newgenfs->fstype); | |
2023 | goto out; | |
2024 | } | |
2025 | if (strcmp(newgenfs->fstype, genfs->fstype) < 0) | |
2026 | break; | |
2027 | } | |
2028 | newgenfs->next = genfs; | |
2029 | if (genfs_p) | |
2030 | genfs_p->next = newgenfs; | |
2031 | else | |
2032 | p->genfs = newgenfs; | |
2033 | genfs = newgenfs; | |
2034 | newgenfs = NULL; | |
2035 | ||
2036 | rc = next_entry(buf, fp, sizeof(u32)); | |
2037 | if (rc) | |
2038 | goto out; | |
2039 | ||
2040 | nel2 = le32_to_cpu(buf[0]); | |
2041 | for (j = 0; j < nel2; j++) { | |
2042 | rc = next_entry(buf, fp, sizeof(u32)); | |
2043 | if (rc) | |
2044 | goto out; | |
2045 | len = le32_to_cpu(buf[0]); | |
2046 | ||
2047 | rc = -ENOMEM; | |
2048 | newc = kzalloc(sizeof(*newc), GFP_KERNEL); | |
2049 | if (!newc) | |
2050 | goto out; | |
2051 | ||
4b6f405f | 2052 | rc = str_read(&newc->u.name, GFP_KERNEL, fp, len); |
d1b43547 EP |
2053 | if (rc) |
2054 | goto out; | |
d1b43547 EP |
2055 | |
2056 | rc = next_entry(buf, fp, sizeof(u32)); | |
2057 | if (rc) | |
2058 | goto out; | |
2059 | ||
2060 | newc->v.sclass = le32_to_cpu(buf[0]); | |
2061 | rc = context_read_and_validate(&newc->context[0], p, fp); | |
2062 | if (rc) | |
2063 | goto out; | |
2064 | ||
2065 | for (l = NULL, c = genfs->head; c; | |
2066 | l = c, c = c->next) { | |
2067 | rc = -EINVAL; | |
2068 | if (!strcmp(newc->u.name, c->u.name) && | |
2069 | (!c->v.sclass || !newc->v.sclass || | |
2070 | newc->v.sclass == c->v.sclass)) { | |
2071 | printk(KERN_ERR "SELinux: dup genfs entry (%s,%s)\n", | |
2072 | genfs->fstype, c->u.name); | |
2073 | goto out; | |
2074 | } | |
2075 | len = strlen(newc->u.name); | |
2076 | len2 = strlen(c->u.name); | |
2077 | if (len > len2) | |
2078 | break; | |
2079 | } | |
2080 | ||
2081 | newc->next = c; | |
2082 | if (l) | |
2083 | l->next = newc; | |
2084 | else | |
2085 | genfs->head = newc; | |
2086 | newc = NULL; | |
2087 | } | |
2088 | } | |
2089 | rc = 0; | |
2090 | out: | |
2091 | if (newgenfs) | |
2092 | kfree(newgenfs->fstype); | |
2093 | kfree(newgenfs); | |
2094 | ocontext_destroy(newc, OCON_FSUSE); | |
2095 | ||
2096 | return rc; | |
2097 | } | |
2098 | ||
692a8a23 EP |
2099 | static int ocontext_read(struct policydb *p, struct policydb_compat_info *info, |
2100 | void *fp) | |
2101 | { | |
2102 | int i, j, rc; | |
2103 | u32 nel, len; | |
2104 | __le32 buf[3]; | |
2105 | struct ocontext *l, *c; | |
2106 | u32 nodebuf[8]; | |
2107 | ||
2108 | for (i = 0; i < info->ocon_num; i++) { | |
2109 | rc = next_entry(buf, fp, sizeof(u32)); | |
2110 | if (rc) | |
2111 | goto out; | |
2112 | nel = le32_to_cpu(buf[0]); | |
2113 | ||
2114 | l = NULL; | |
2115 | for (j = 0; j < nel; j++) { | |
2116 | rc = -ENOMEM; | |
2117 | c = kzalloc(sizeof(*c), GFP_KERNEL); | |
2118 | if (!c) | |
2119 | goto out; | |
2120 | if (l) | |
2121 | l->next = c; | |
2122 | else | |
2123 | p->ocontexts[i] = c; | |
2124 | l = c; | |
2125 | ||
2126 | switch (i) { | |
2127 | case OCON_ISID: | |
2128 | rc = next_entry(buf, fp, sizeof(u32)); | |
2129 | if (rc) | |
2130 | goto out; | |
2131 | ||
2132 | c->sid[0] = le32_to_cpu(buf[0]); | |
2133 | rc = context_read_and_validate(&c->context[0], p, fp); | |
2134 | if (rc) | |
2135 | goto out; | |
2136 | break; | |
2137 | case OCON_FS: | |
2138 | case OCON_NETIF: | |
2139 | rc = next_entry(buf, fp, sizeof(u32)); | |
2140 | if (rc) | |
2141 | goto out; | |
2142 | len = le32_to_cpu(buf[0]); | |
2143 | ||
4b6f405f | 2144 | rc = str_read(&c->u.name, GFP_KERNEL, fp, len); |
692a8a23 EP |
2145 | if (rc) |
2146 | goto out; | |
2147 | ||
692a8a23 EP |
2148 | rc = context_read_and_validate(&c->context[0], p, fp); |
2149 | if (rc) | |
2150 | goto out; | |
2151 | rc = context_read_and_validate(&c->context[1], p, fp); | |
2152 | if (rc) | |
2153 | goto out; | |
2154 | break; | |
2155 | case OCON_PORT: | |
2156 | rc = next_entry(buf, fp, sizeof(u32)*3); | |
2157 | if (rc) | |
2158 | goto out; | |
2159 | c->u.port.protocol = le32_to_cpu(buf[0]); | |
2160 | c->u.port.low_port = le32_to_cpu(buf[1]); | |
2161 | c->u.port.high_port = le32_to_cpu(buf[2]); | |
2162 | rc = context_read_and_validate(&c->context[0], p, fp); | |
2163 | if (rc) | |
2164 | goto out; | |
2165 | break; | |
2166 | case OCON_NODE: | |
2167 | rc = next_entry(nodebuf, fp, sizeof(u32) * 2); | |
2168 | if (rc) | |
2169 | goto out; | |
2170 | c->u.node.addr = nodebuf[0]; /* network order */ | |
2171 | c->u.node.mask = nodebuf[1]; /* network order */ | |
2172 | rc = context_read_and_validate(&c->context[0], p, fp); | |
2173 | if (rc) | |
2174 | goto out; | |
2175 | break; | |
2176 | case OCON_FSUSE: | |
2177 | rc = next_entry(buf, fp, sizeof(u32)*2); | |
2178 | if (rc) | |
2179 | goto out; | |
2180 | ||
2181 | rc = -EINVAL; | |
2182 | c->v.behavior = le32_to_cpu(buf[0]); | |
eb9ae686 DQ |
2183 | /* Determined at runtime, not in policy DB. */ |
2184 | if (c->v.behavior == SECURITY_FS_USE_MNTPOINT) | |
2185 | goto out; | |
2186 | if (c->v.behavior > SECURITY_FS_USE_MAX) | |
692a8a23 EP |
2187 | goto out; |
2188 | ||
692a8a23 | 2189 | len = le32_to_cpu(buf[1]); |
4b6f405f | 2190 | rc = str_read(&c->u.name, GFP_KERNEL, fp, len); |
692a8a23 EP |
2191 | if (rc) |
2192 | goto out; | |
4b6f405f | 2193 | |
692a8a23 EP |
2194 | rc = context_read_and_validate(&c->context[0], p, fp); |
2195 | if (rc) | |
2196 | goto out; | |
2197 | break; | |
2198 | case OCON_NODE6: { | |
2199 | int k; | |
2200 | ||
2201 | rc = next_entry(nodebuf, fp, sizeof(u32) * 8); | |
2202 | if (rc) | |
2203 | goto out; | |
2204 | for (k = 0; k < 4; k++) | |
2205 | c->u.node6.addr[k] = nodebuf[k]; | |
2206 | for (k = 0; k < 4; k++) | |
2207 | c->u.node6.mask[k] = nodebuf[k+4]; | |
2208 | rc = context_read_and_validate(&c->context[0], p, fp); | |
2209 | if (rc) | |
2210 | goto out; | |
2211 | break; | |
2212 | } | |
2213 | } | |
2214 | } | |
2215 | } | |
2216 | rc = 0; | |
2217 | out: | |
2218 | return rc; | |
2219 | } | |
2220 | ||
1da177e4 LT |
2221 | /* |
2222 | * Read the configuration data from a policy database binary | |
2223 | * representation file into a policy database structure. | |
2224 | */ | |
2225 | int policydb_read(struct policydb *p, void *fp) | |
2226 | { | |
2227 | struct role_allow *ra, *lra; | |
2228 | struct role_trans *tr, *ltr; | |
1da177e4 | 2229 | int i, j, rc; |
59dbd1ba | 2230 | __le32 buf[4]; |
d1b43547 EP |
2231 | u32 len, nprim, nel; |
2232 | ||
1da177e4 LT |
2233 | char *policydb_str; |
2234 | struct policydb_compat_info *info; | |
1da177e4 | 2235 | |
1da177e4 LT |
2236 | rc = policydb_init(p); |
2237 | if (rc) | |
9398c7f7 | 2238 | return rc; |
1da177e4 LT |
2239 | |
2240 | /* Read the magic number and string length. */ | |
2ced3dfd | 2241 | rc = next_entry(buf, fp, sizeof(u32) * 2); |
9398c7f7 | 2242 | if (rc) |
1da177e4 LT |
2243 | goto bad; |
2244 | ||
9398c7f7 | 2245 | rc = -EINVAL; |
b5bf6c55 | 2246 | if (le32_to_cpu(buf[0]) != POLICYDB_MAGIC) { |
454d972c | 2247 | printk(KERN_ERR "SELinux: policydb magic number 0x%x does " |
1da177e4 | 2248 | "not match expected magic number 0x%x\n", |
b5bf6c55 | 2249 | le32_to_cpu(buf[0]), POLICYDB_MAGIC); |
1da177e4 LT |
2250 | goto bad; |
2251 | } | |
2252 | ||
9398c7f7 | 2253 | rc = -EINVAL; |
b5bf6c55 | 2254 | len = le32_to_cpu(buf[1]); |
1da177e4 | 2255 | if (len != strlen(POLICYDB_STRING)) { |
454d972c | 2256 | printk(KERN_ERR "SELinux: policydb string length %d does not " |
1da177e4 LT |
2257 | "match expected length %Zu\n", |
2258 | len, strlen(POLICYDB_STRING)); | |
2259 | goto bad; | |
2260 | } | |
9398c7f7 EP |
2261 | |
2262 | rc = -ENOMEM; | |
2ced3dfd | 2263 | policydb_str = kmalloc(len + 1, GFP_KERNEL); |
1da177e4 | 2264 | if (!policydb_str) { |
454d972c | 2265 | printk(KERN_ERR "SELinux: unable to allocate memory for policydb " |
1da177e4 | 2266 | "string of length %d\n", len); |
1da177e4 LT |
2267 | goto bad; |
2268 | } | |
9398c7f7 | 2269 | |
1da177e4 | 2270 | rc = next_entry(policydb_str, fp, len); |
9398c7f7 | 2271 | if (rc) { |
454d972c | 2272 | printk(KERN_ERR "SELinux: truncated policydb string identifier\n"); |
1da177e4 LT |
2273 | kfree(policydb_str); |
2274 | goto bad; | |
2275 | } | |
9398c7f7 EP |
2276 | |
2277 | rc = -EINVAL; | |
df4ea865 | 2278 | policydb_str[len] = '\0'; |
1da177e4 | 2279 | if (strcmp(policydb_str, POLICYDB_STRING)) { |
454d972c | 2280 | printk(KERN_ERR "SELinux: policydb string %s does not match " |
1da177e4 LT |
2281 | "my string %s\n", policydb_str, POLICYDB_STRING); |
2282 | kfree(policydb_str); | |
2283 | goto bad; | |
2284 | } | |
2285 | /* Done with policydb_str. */ | |
2286 | kfree(policydb_str); | |
2287 | policydb_str = NULL; | |
2288 | ||
0719aaf5 | 2289 | /* Read the version and table sizes. */ |
1da177e4 | 2290 | rc = next_entry(buf, fp, sizeof(u32)*4); |
9398c7f7 | 2291 | if (rc) |
1da177e4 | 2292 | goto bad; |
1da177e4 | 2293 | |
9398c7f7 | 2294 | rc = -EINVAL; |
b5bf6c55 | 2295 | p->policyvers = le32_to_cpu(buf[0]); |
1da177e4 LT |
2296 | if (p->policyvers < POLICYDB_VERSION_MIN || |
2297 | p->policyvers > POLICYDB_VERSION_MAX) { | |
454d972c | 2298 | printk(KERN_ERR "SELinux: policydb version %d does not match " |
2ced3dfd EP |
2299 | "my version range %d-%d\n", |
2300 | le32_to_cpu(buf[0]), POLICYDB_VERSION_MIN, POLICYDB_VERSION_MAX); | |
2301 | goto bad; | |
1da177e4 LT |
2302 | } |
2303 | ||
b5bf6c55 | 2304 | if ((le32_to_cpu(buf[1]) & POLICYDB_CONFIG_MLS)) { |
0719aaf5 | 2305 | p->mls_enabled = 1; |
1da177e4 | 2306 | |
9398c7f7 | 2307 | rc = -EINVAL; |
1da177e4 | 2308 | if (p->policyvers < POLICYDB_VERSION_MLS) { |
744ba35e EP |
2309 | printk(KERN_ERR "SELinux: security policydb version %d " |
2310 | "(MLS) not backwards compatible\n", | |
2311 | p->policyvers); | |
1da177e4 LT |
2312 | goto bad; |
2313 | } | |
1da177e4 | 2314 | } |
3f12070e EP |
2315 | p->reject_unknown = !!(le32_to_cpu(buf[1]) & REJECT_UNKNOWN); |
2316 | p->allow_unknown = !!(le32_to_cpu(buf[1]) & ALLOW_UNKNOWN); | |
1da177e4 | 2317 | |
9398c7f7 EP |
2318 | if (p->policyvers >= POLICYDB_VERSION_POLCAP) { |
2319 | rc = ebitmap_read(&p->policycaps, fp); | |
2320 | if (rc) | |
2321 | goto bad; | |
2322 | } | |
3bb56b25 | 2323 | |
9398c7f7 EP |
2324 | if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE) { |
2325 | rc = ebitmap_read(&p->permissive_map, fp); | |
2326 | if (rc) | |
2327 | goto bad; | |
2328 | } | |
64dbf074 | 2329 | |
9398c7f7 | 2330 | rc = -EINVAL; |
1da177e4 LT |
2331 | info = policydb_lookup_compat(p->policyvers); |
2332 | if (!info) { | |
454d972c | 2333 | printk(KERN_ERR "SELinux: unable to find policy compat info " |
1da177e4 LT |
2334 | "for version %d\n", p->policyvers); |
2335 | goto bad; | |
2336 | } | |
2337 | ||
9398c7f7 | 2338 | rc = -EINVAL; |
b5bf6c55 AD |
2339 | if (le32_to_cpu(buf[2]) != info->sym_num || |
2340 | le32_to_cpu(buf[3]) != info->ocon_num) { | |
454d972c | 2341 | printk(KERN_ERR "SELinux: policydb table sizes (%d,%d) do " |
b5bf6c55 AD |
2342 | "not match mine (%d,%d)\n", le32_to_cpu(buf[2]), |
2343 | le32_to_cpu(buf[3]), | |
1da177e4 LT |
2344 | info->sym_num, info->ocon_num); |
2345 | goto bad; | |
2346 | } | |
2347 | ||
2348 | for (i = 0; i < info->sym_num; i++) { | |
2349 | rc = next_entry(buf, fp, sizeof(u32)*2); | |
9398c7f7 | 2350 | if (rc) |
1da177e4 LT |
2351 | goto bad; |
2352 | nprim = le32_to_cpu(buf[0]); | |
2353 | nel = le32_to_cpu(buf[1]); | |
2354 | for (j = 0; j < nel; j++) { | |
2355 | rc = read_f[i](p, p->symtab[i].table, fp); | |
2356 | if (rc) | |
2357 | goto bad; | |
2358 | } | |
2359 | ||
2360 | p->symtab[i].nprim = nprim; | |
2361 | } | |
2362 | ||
1214eac7 HC |
2363 | rc = -EINVAL; |
2364 | p->process_class = string_to_security_class(p, "process"); | |
2365 | if (!p->process_class) | |
2366 | goto bad; | |
2367 | ||
45e5421e | 2368 | rc = avtab_read(&p->te_avtab, fp, p); |
1da177e4 LT |
2369 | if (rc) |
2370 | goto bad; | |
2371 | ||
2372 | if (p->policyvers >= POLICYDB_VERSION_BOOL) { | |
2373 | rc = cond_read_list(p, fp); | |
2374 | if (rc) | |
2375 | goto bad; | |
2376 | } | |
2377 | ||
2378 | rc = next_entry(buf, fp, sizeof(u32)); | |
9398c7f7 | 2379 | if (rc) |
1da177e4 LT |
2380 | goto bad; |
2381 | nel = le32_to_cpu(buf[0]); | |
2382 | ltr = NULL; | |
2383 | for (i = 0; i < nel; i++) { | |
9398c7f7 | 2384 | rc = -ENOMEM; |
89d155ef | 2385 | tr = kzalloc(sizeof(*tr), GFP_KERNEL); |
9398c7f7 | 2386 | if (!tr) |
1da177e4 | 2387 | goto bad; |
2ced3dfd | 2388 | if (ltr) |
1da177e4 | 2389 | ltr->next = tr; |
2ced3dfd | 2390 | else |
1da177e4 | 2391 | p->role_tr = tr; |
1da177e4 | 2392 | rc = next_entry(buf, fp, sizeof(u32)*3); |
9398c7f7 | 2393 | if (rc) |
1da177e4 | 2394 | goto bad; |
9398c7f7 EP |
2395 | |
2396 | rc = -EINVAL; | |
1da177e4 LT |
2397 | tr->role = le32_to_cpu(buf[0]); |
2398 | tr->type = le32_to_cpu(buf[1]); | |
2399 | tr->new_role = le32_to_cpu(buf[2]); | |
8023976c HC |
2400 | if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) { |
2401 | rc = next_entry(buf, fp, sizeof(u32)); | |
2402 | if (rc) | |
2403 | goto bad; | |
2404 | tr->tclass = le32_to_cpu(buf[0]); | |
2405 | } else | |
2406 | tr->tclass = p->process_class; | |
2407 | ||
45e5421e SS |
2408 | if (!policydb_role_isvalid(p, tr->role) || |
2409 | !policydb_type_isvalid(p, tr->type) || | |
8023976c | 2410 | !policydb_class_isvalid(p, tr->tclass) || |
9398c7f7 | 2411 | !policydb_role_isvalid(p, tr->new_role)) |
45e5421e | 2412 | goto bad; |
1da177e4 LT |
2413 | ltr = tr; |
2414 | } | |
2415 | ||
2416 | rc = next_entry(buf, fp, sizeof(u32)); | |
9398c7f7 | 2417 | if (rc) |
1da177e4 LT |
2418 | goto bad; |
2419 | nel = le32_to_cpu(buf[0]); | |
2420 | lra = NULL; | |
2421 | for (i = 0; i < nel; i++) { | |
9398c7f7 | 2422 | rc = -ENOMEM; |
89d155ef | 2423 | ra = kzalloc(sizeof(*ra), GFP_KERNEL); |
9398c7f7 | 2424 | if (!ra) |
1da177e4 | 2425 | goto bad; |
2ced3dfd | 2426 | if (lra) |
1da177e4 | 2427 | lra->next = ra; |
2ced3dfd | 2428 | else |
1da177e4 | 2429 | p->role_allow = ra; |
1da177e4 | 2430 | rc = next_entry(buf, fp, sizeof(u32)*2); |
9398c7f7 | 2431 | if (rc) |
1da177e4 | 2432 | goto bad; |
9398c7f7 EP |
2433 | |
2434 | rc = -EINVAL; | |
1da177e4 LT |
2435 | ra->role = le32_to_cpu(buf[0]); |
2436 | ra->new_role = le32_to_cpu(buf[1]); | |
45e5421e | 2437 | if (!policydb_role_isvalid(p, ra->role) || |
9398c7f7 | 2438 | !policydb_role_isvalid(p, ra->new_role)) |
45e5421e | 2439 | goto bad; |
1da177e4 LT |
2440 | lra = ra; |
2441 | } | |
2442 | ||
652bb9b0 EP |
2443 | rc = filename_trans_read(p, fp); |
2444 | if (rc) | |
2445 | goto bad; | |
2446 | ||
1d9bc6dc | 2447 | rc = policydb_index(p); |
1da177e4 LT |
2448 | if (rc) |
2449 | goto bad; | |
2450 | ||
9398c7f7 EP |
2451 | rc = -EINVAL; |
2452 | p->process_trans_perms = string_to_av_perm(p, p->process_class, "transition"); | |
2453 | p->process_trans_perms |= string_to_av_perm(p, p->process_class, "dyntransition"); | |
c6d3aaa4 SS |
2454 | if (!p->process_trans_perms) |
2455 | goto bad; | |
2456 | ||
692a8a23 EP |
2457 | rc = ocontext_read(p, info, fp); |
2458 | if (rc) | |
2459 | goto bad; | |
1da177e4 | 2460 | |
d1b43547 EP |
2461 | rc = genfs_read(p, fp); |
2462 | if (rc) | |
1da177e4 | 2463 | goto bad; |
1da177e4 | 2464 | |
9ee0c823 EP |
2465 | rc = range_read(p, fp); |
2466 | if (rc) | |
2467 | goto bad; | |
1da177e4 | 2468 | |
6371dcd3 EP |
2469 | rc = -ENOMEM; |
2470 | p->type_attr_map_array = flex_array_alloc(sizeof(struct ebitmap), | |
2471 | p->p_types.nprim, | |
2472 | GFP_KERNEL | __GFP_ZERO); | |
2473 | if (!p->type_attr_map_array) | |
2474 | goto bad; | |
2475 | ||
2476 | /* preallocate so we don't have to worry about the put ever failing */ | |
5a3ea878 | 2477 | rc = flex_array_prealloc(p->type_attr_map_array, 0, p->p_types.nprim, |
6371dcd3 EP |
2478 | GFP_KERNEL | __GFP_ZERO); |
2479 | if (rc) | |
782ebb99 SS |
2480 | goto bad; |
2481 | ||
2482 | for (i = 0; i < p->p_types.nprim; i++) { | |
6371dcd3 EP |
2483 | struct ebitmap *e = flex_array_get(p->type_attr_map_array, i); |
2484 | ||
2485 | BUG_ON(!e); | |
2486 | ebitmap_init(e); | |
782ebb99 | 2487 | if (p->policyvers >= POLICYDB_VERSION_AVTAB) { |
6371dcd3 EP |
2488 | rc = ebitmap_read(e, fp); |
2489 | if (rc) | |
782ebb99 SS |
2490 | goto bad; |
2491 | } | |
2492 | /* add the type itself as the degenerate case */ | |
6371dcd3 EP |
2493 | rc = ebitmap_set_bit(e, i, 1); |
2494 | if (rc) | |
2495 | goto bad; | |
782ebb99 SS |
2496 | } |
2497 | ||
d9250dea KK |
2498 | rc = policydb_bounds_sanity_check(p); |
2499 | if (rc) | |
2500 | goto bad; | |
2501 | ||
1da177e4 LT |
2502 | rc = 0; |
2503 | out: | |
2504 | return rc; | |
1da177e4 | 2505 | bad: |
1da177e4 LT |
2506 | policydb_destroy(p); |
2507 | goto out; | |
2508 | } | |
cee74f47 EP |
2509 | |
2510 | /* | |
2511 | * Write a MLS level structure to a policydb binary | |
2512 | * representation file. | |
2513 | */ | |
2514 | static int mls_write_level(struct mls_level *l, void *fp) | |
2515 | { | |
2516 | __le32 buf[1]; | |
2517 | int rc; | |
2518 | ||
2519 | buf[0] = cpu_to_le32(l->sens); | |
2520 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
2521 | if (rc) | |
2522 | return rc; | |
2523 | ||
2524 | rc = ebitmap_write(&l->cat, fp); | |
2525 | if (rc) | |
2526 | return rc; | |
2527 | ||
2528 | return 0; | |
2529 | } | |
2530 | ||
2531 | /* | |
2532 | * Write a MLS range structure to a policydb binary | |
2533 | * representation file. | |
2534 | */ | |
2535 | static int mls_write_range_helper(struct mls_range *r, void *fp) | |
2536 | { | |
2537 | __le32 buf[3]; | |
2538 | size_t items; | |
2539 | int rc, eq; | |
2540 | ||
2541 | eq = mls_level_eq(&r->level[1], &r->level[0]); | |
2542 | ||
2543 | if (eq) | |
2544 | items = 2; | |
2545 | else | |
2546 | items = 3; | |
2547 | buf[0] = cpu_to_le32(items-1); | |
2548 | buf[1] = cpu_to_le32(r->level[0].sens); | |
2549 | if (!eq) | |
2550 | buf[2] = cpu_to_le32(r->level[1].sens); | |
2551 | ||
5c7001b8 | 2552 | BUG_ON(items > ARRAY_SIZE(buf)); |
cee74f47 EP |
2553 | |
2554 | rc = put_entry(buf, sizeof(u32), items, fp); | |
2555 | if (rc) | |
2556 | return rc; | |
2557 | ||
2558 | rc = ebitmap_write(&r->level[0].cat, fp); | |
2559 | if (rc) | |
2560 | return rc; | |
2561 | if (!eq) { | |
2562 | rc = ebitmap_write(&r->level[1].cat, fp); | |
2563 | if (rc) | |
2564 | return rc; | |
2565 | } | |
2566 | ||
2567 | return 0; | |
2568 | } | |
2569 | ||
2570 | static int sens_write(void *vkey, void *datum, void *ptr) | |
2571 | { | |
2572 | char *key = vkey; | |
2573 | struct level_datum *levdatum = datum; | |
2574 | struct policy_data *pd = ptr; | |
2575 | void *fp = pd->fp; | |
2576 | __le32 buf[2]; | |
2577 | size_t len; | |
2578 | int rc; | |
2579 | ||
2580 | len = strlen(key); | |
2581 | buf[0] = cpu_to_le32(len); | |
2582 | buf[1] = cpu_to_le32(levdatum->isalias); | |
2583 | rc = put_entry(buf, sizeof(u32), 2, fp); | |
2584 | if (rc) | |
2585 | return rc; | |
2586 | ||
2587 | rc = put_entry(key, 1, len, fp); | |
2588 | if (rc) | |
2589 | return rc; | |
2590 | ||
2591 | rc = mls_write_level(levdatum->level, fp); | |
2592 | if (rc) | |
2593 | return rc; | |
2594 | ||
2595 | return 0; | |
2596 | } | |
2597 | ||
2598 | static int cat_write(void *vkey, void *datum, void *ptr) | |
2599 | { | |
2600 | char *key = vkey; | |
2601 | struct cat_datum *catdatum = datum; | |
2602 | struct policy_data *pd = ptr; | |
2603 | void *fp = pd->fp; | |
2604 | __le32 buf[3]; | |
2605 | size_t len; | |
2606 | int rc; | |
2607 | ||
2608 | len = strlen(key); | |
2609 | buf[0] = cpu_to_le32(len); | |
2610 | buf[1] = cpu_to_le32(catdatum->value); | |
2611 | buf[2] = cpu_to_le32(catdatum->isalias); | |
2612 | rc = put_entry(buf, sizeof(u32), 3, fp); | |
2613 | if (rc) | |
2614 | return rc; | |
2615 | ||
2616 | rc = put_entry(key, 1, len, fp); | |
2617 | if (rc) | |
2618 | return rc; | |
2619 | ||
2620 | return 0; | |
2621 | } | |
2622 | ||
c900ff32 | 2623 | static int role_trans_write(struct policydb *p, void *fp) |
cee74f47 | 2624 | { |
c900ff32 | 2625 | struct role_trans *r = p->role_tr; |
cee74f47 EP |
2626 | struct role_trans *tr; |
2627 | u32 buf[3]; | |
2628 | size_t nel; | |
2629 | int rc; | |
2630 | ||
2631 | nel = 0; | |
2632 | for (tr = r; tr; tr = tr->next) | |
2633 | nel++; | |
2634 | buf[0] = cpu_to_le32(nel); | |
2635 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
2636 | if (rc) | |
2637 | return rc; | |
2638 | for (tr = r; tr; tr = tr->next) { | |
2639 | buf[0] = cpu_to_le32(tr->role); | |
2640 | buf[1] = cpu_to_le32(tr->type); | |
2641 | buf[2] = cpu_to_le32(tr->new_role); | |
2642 | rc = put_entry(buf, sizeof(u32), 3, fp); | |
2643 | if (rc) | |
2644 | return rc; | |
c900ff32 HC |
2645 | if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) { |
2646 | buf[0] = cpu_to_le32(tr->tclass); | |
2647 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
2648 | if (rc) | |
2649 | return rc; | |
2650 | } | |
cee74f47 EP |
2651 | } |
2652 | ||
2653 | return 0; | |
2654 | } | |
2655 | ||
2656 | static int role_allow_write(struct role_allow *r, void *fp) | |
2657 | { | |
2658 | struct role_allow *ra; | |
2659 | u32 buf[2]; | |
2660 | size_t nel; | |
2661 | int rc; | |
2662 | ||
2663 | nel = 0; | |
2664 | for (ra = r; ra; ra = ra->next) | |
2665 | nel++; | |
2666 | buf[0] = cpu_to_le32(nel); | |
2667 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
2668 | if (rc) | |
2669 | return rc; | |
2670 | for (ra = r; ra; ra = ra->next) { | |
2671 | buf[0] = cpu_to_le32(ra->role); | |
2672 | buf[1] = cpu_to_le32(ra->new_role); | |
2673 | rc = put_entry(buf, sizeof(u32), 2, fp); | |
2674 | if (rc) | |
2675 | return rc; | |
2676 | } | |
2677 | return 0; | |
2678 | } | |
2679 | ||
2680 | /* | |
2681 | * Write a security context structure | |
2682 | * to a policydb binary representation file. | |
2683 | */ | |
2684 | static int context_write(struct policydb *p, struct context *c, | |
2685 | void *fp) | |
2686 | { | |
2687 | int rc; | |
2688 | __le32 buf[3]; | |
2689 | ||
2690 | buf[0] = cpu_to_le32(c->user); | |
2691 | buf[1] = cpu_to_le32(c->role); | |
2692 | buf[2] = cpu_to_le32(c->type); | |
2693 | ||
2694 | rc = put_entry(buf, sizeof(u32), 3, fp); | |
2695 | if (rc) | |
2696 | return rc; | |
2697 | ||
2698 | rc = mls_write_range_helper(&c->range, fp); | |
2699 | if (rc) | |
2700 | return rc; | |
2701 | ||
2702 | return 0; | |
2703 | } | |
2704 | ||
2705 | /* | |
2706 | * The following *_write functions are used to | |
2707 | * write the symbol data to a policy database | |
2708 | * binary representation file. | |
2709 | */ | |
2710 | ||
2711 | static int perm_write(void *vkey, void *datum, void *fp) | |
2712 | { | |
2713 | char *key = vkey; | |
2714 | struct perm_datum *perdatum = datum; | |
2715 | __le32 buf[2]; | |
2716 | size_t len; | |
2717 | int rc; | |
2718 | ||
2719 | len = strlen(key); | |
2720 | buf[0] = cpu_to_le32(len); | |
2721 | buf[1] = cpu_to_le32(perdatum->value); | |
2722 | rc = put_entry(buf, sizeof(u32), 2, fp); | |
2723 | if (rc) | |
2724 | return rc; | |
2725 | ||
2726 | rc = put_entry(key, 1, len, fp); | |
2727 | if (rc) | |
2728 | return rc; | |
2729 | ||
2730 | return 0; | |
2731 | } | |
2732 | ||
2733 | static int common_write(void *vkey, void *datum, void *ptr) | |
2734 | { | |
2735 | char *key = vkey; | |
2736 | struct common_datum *comdatum = datum; | |
2737 | struct policy_data *pd = ptr; | |
2738 | void *fp = pd->fp; | |
2739 | __le32 buf[4]; | |
2740 | size_t len; | |
2741 | int rc; | |
2742 | ||
2743 | len = strlen(key); | |
2744 | buf[0] = cpu_to_le32(len); | |
2745 | buf[1] = cpu_to_le32(comdatum->value); | |
2746 | buf[2] = cpu_to_le32(comdatum->permissions.nprim); | |
2747 | buf[3] = cpu_to_le32(comdatum->permissions.table->nel); | |
2748 | rc = put_entry(buf, sizeof(u32), 4, fp); | |
2749 | if (rc) | |
2750 | return rc; | |
2751 | ||
2752 | rc = put_entry(key, 1, len, fp); | |
2753 | if (rc) | |
2754 | return rc; | |
2755 | ||
2756 | rc = hashtab_map(comdatum->permissions.table, perm_write, fp); | |
2757 | if (rc) | |
2758 | return rc; | |
2759 | ||
2760 | return 0; | |
2761 | } | |
2762 | ||
a660bec1 RH |
2763 | static int type_set_write(struct type_set *t, void *fp) |
2764 | { | |
2765 | int rc; | |
2766 | __le32 buf[1]; | |
2767 | ||
2768 | if (ebitmap_write(&t->types, fp)) | |
2769 | return -EINVAL; | |
2770 | if (ebitmap_write(&t->negset, fp)) | |
2771 | return -EINVAL; | |
2772 | ||
2773 | buf[0] = cpu_to_le32(t->flags); | |
2774 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
2775 | if (rc) | |
2776 | return -EINVAL; | |
2777 | ||
2778 | return 0; | |
2779 | } | |
2780 | ||
cee74f47 EP |
2781 | static int write_cons_helper(struct policydb *p, struct constraint_node *node, |
2782 | void *fp) | |
2783 | { | |
2784 | struct constraint_node *c; | |
2785 | struct constraint_expr *e; | |
2786 | __le32 buf[3]; | |
2787 | u32 nel; | |
2788 | int rc; | |
2789 | ||
2790 | for (c = node; c; c = c->next) { | |
2791 | nel = 0; | |
2792 | for (e = c->expr; e; e = e->next) | |
2793 | nel++; | |
2794 | buf[0] = cpu_to_le32(c->permissions); | |
2795 | buf[1] = cpu_to_le32(nel); | |
2796 | rc = put_entry(buf, sizeof(u32), 2, fp); | |
2797 | if (rc) | |
2798 | return rc; | |
2799 | for (e = c->expr; e; e = e->next) { | |
2800 | buf[0] = cpu_to_le32(e->expr_type); | |
2801 | buf[1] = cpu_to_le32(e->attr); | |
2802 | buf[2] = cpu_to_le32(e->op); | |
2803 | rc = put_entry(buf, sizeof(u32), 3, fp); | |
2804 | if (rc) | |
2805 | return rc; | |
2806 | ||
2807 | switch (e->expr_type) { | |
2808 | case CEXPR_NAMES: | |
2809 | rc = ebitmap_write(&e->names, fp); | |
2810 | if (rc) | |
2811 | return rc; | |
a660bec1 RH |
2812 | if (p->policyvers >= |
2813 | POLICYDB_VERSION_CONSTRAINT_NAMES) { | |
2814 | rc = type_set_write(e->type_names, fp); | |
2815 | if (rc) | |
2816 | return rc; | |
2817 | } | |
cee74f47 EP |
2818 | break; |
2819 | default: | |
2820 | break; | |
2821 | } | |
2822 | } | |
2823 | } | |
2824 | ||
2825 | return 0; | |
2826 | } | |
2827 | ||
2828 | static int class_write(void *vkey, void *datum, void *ptr) | |
2829 | { | |
2830 | char *key = vkey; | |
2831 | struct class_datum *cladatum = datum; | |
2832 | struct policy_data *pd = ptr; | |
2833 | void *fp = pd->fp; | |
2834 | struct policydb *p = pd->p; | |
2835 | struct constraint_node *c; | |
2836 | __le32 buf[6]; | |
2837 | u32 ncons; | |
2838 | size_t len, len2; | |
2839 | int rc; | |
2840 | ||
2841 | len = strlen(key); | |
2842 | if (cladatum->comkey) | |
2843 | len2 = strlen(cladatum->comkey); | |
2844 | else | |
2845 | len2 = 0; | |
2846 | ||
2847 | ncons = 0; | |
2848 | for (c = cladatum->constraints; c; c = c->next) | |
2849 | ncons++; | |
2850 | ||
2851 | buf[0] = cpu_to_le32(len); | |
2852 | buf[1] = cpu_to_le32(len2); | |
2853 | buf[2] = cpu_to_le32(cladatum->value); | |
2854 | buf[3] = cpu_to_le32(cladatum->permissions.nprim); | |
2855 | if (cladatum->permissions.table) | |
2856 | buf[4] = cpu_to_le32(cladatum->permissions.table->nel); | |
2857 | else | |
2858 | buf[4] = 0; | |
2859 | buf[5] = cpu_to_le32(ncons); | |
2860 | rc = put_entry(buf, sizeof(u32), 6, fp); | |
2861 | if (rc) | |
2862 | return rc; | |
2863 | ||
2864 | rc = put_entry(key, 1, len, fp); | |
2865 | if (rc) | |
2866 | return rc; | |
2867 | ||
2868 | if (cladatum->comkey) { | |
2869 | rc = put_entry(cladatum->comkey, 1, len2, fp); | |
2870 | if (rc) | |
2871 | return rc; | |
2872 | } | |
2873 | ||
2874 | rc = hashtab_map(cladatum->permissions.table, perm_write, fp); | |
2875 | if (rc) | |
2876 | return rc; | |
2877 | ||
2878 | rc = write_cons_helper(p, cladatum->constraints, fp); | |
2879 | if (rc) | |
2880 | return rc; | |
2881 | ||
2882 | /* write out the validatetrans rule */ | |
2883 | ncons = 0; | |
2884 | for (c = cladatum->validatetrans; c; c = c->next) | |
2885 | ncons++; | |
2886 | ||
2887 | buf[0] = cpu_to_le32(ncons); | |
2888 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
2889 | if (rc) | |
2890 | return rc; | |
2891 | ||
2892 | rc = write_cons_helper(p, cladatum->validatetrans, fp); | |
2893 | if (rc) | |
2894 | return rc; | |
2895 | ||
aa893269 EP |
2896 | if (p->policyvers >= POLICYDB_VERSION_NEW_OBJECT_DEFAULTS) { |
2897 | buf[0] = cpu_to_le32(cladatum->default_user); | |
2898 | buf[1] = cpu_to_le32(cladatum->default_role); | |
2899 | buf[2] = cpu_to_le32(cladatum->default_range); | |
2900 | ||
2901 | rc = put_entry(buf, sizeof(uint32_t), 3, fp); | |
2902 | if (rc) | |
2903 | return rc; | |
2904 | } | |
2905 | ||
eed7795d EP |
2906 | if (p->policyvers >= POLICYDB_VERSION_DEFAULT_TYPE) { |
2907 | buf[0] = cpu_to_le32(cladatum->default_type); | |
2908 | rc = put_entry(buf, sizeof(uint32_t), 1, fp); | |
2909 | if (rc) | |
2910 | return rc; | |
2911 | } | |
2912 | ||
cee74f47 EP |
2913 | return 0; |
2914 | } | |
2915 | ||
2916 | static int role_write(void *vkey, void *datum, void *ptr) | |
2917 | { | |
2918 | char *key = vkey; | |
2919 | struct role_datum *role = datum; | |
2920 | struct policy_data *pd = ptr; | |
2921 | void *fp = pd->fp; | |
2922 | struct policydb *p = pd->p; | |
2923 | __le32 buf[3]; | |
2924 | size_t items, len; | |
2925 | int rc; | |
2926 | ||
2927 | len = strlen(key); | |
2928 | items = 0; | |
2929 | buf[items++] = cpu_to_le32(len); | |
2930 | buf[items++] = cpu_to_le32(role->value); | |
2931 | if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) | |
2932 | buf[items++] = cpu_to_le32(role->bounds); | |
2933 | ||
5c7001b8 | 2934 | BUG_ON(items > ARRAY_SIZE(buf)); |
cee74f47 EP |
2935 | |
2936 | rc = put_entry(buf, sizeof(u32), items, fp); | |
2937 | if (rc) | |
2938 | return rc; | |
2939 | ||
2940 | rc = put_entry(key, 1, len, fp); | |
2941 | if (rc) | |
2942 | return rc; | |
2943 | ||
2944 | rc = ebitmap_write(&role->dominates, fp); | |
2945 | if (rc) | |
2946 | return rc; | |
2947 | ||
2948 | rc = ebitmap_write(&role->types, fp); | |
2949 | if (rc) | |
2950 | return rc; | |
2951 | ||
2952 | return 0; | |
2953 | } | |
2954 | ||
2955 | static int type_write(void *vkey, void *datum, void *ptr) | |
2956 | { | |
2957 | char *key = vkey; | |
2958 | struct type_datum *typdatum = datum; | |
2959 | struct policy_data *pd = ptr; | |
2960 | struct policydb *p = pd->p; | |
2961 | void *fp = pd->fp; | |
2962 | __le32 buf[4]; | |
2963 | int rc; | |
2964 | size_t items, len; | |
2965 | ||
2966 | len = strlen(key); | |
2967 | items = 0; | |
2968 | buf[items++] = cpu_to_le32(len); | |
2969 | buf[items++] = cpu_to_le32(typdatum->value); | |
2970 | if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) { | |
2971 | u32 properties = 0; | |
2972 | ||
2973 | if (typdatum->primary) | |
2974 | properties |= TYPEDATUM_PROPERTY_PRIMARY; | |
2975 | ||
2976 | if (typdatum->attribute) | |
2977 | properties |= TYPEDATUM_PROPERTY_ATTRIBUTE; | |
2978 | ||
2979 | buf[items++] = cpu_to_le32(properties); | |
2980 | buf[items++] = cpu_to_le32(typdatum->bounds); | |
2981 | } else { | |
2982 | buf[items++] = cpu_to_le32(typdatum->primary); | |
2983 | } | |
5c7001b8 | 2984 | BUG_ON(items > ARRAY_SIZE(buf)); |
cee74f47 EP |
2985 | rc = put_entry(buf, sizeof(u32), items, fp); |
2986 | if (rc) | |
2987 | return rc; | |
2988 | ||
2989 | rc = put_entry(key, 1, len, fp); | |
2990 | if (rc) | |
2991 | return rc; | |
2992 | ||
2993 | return 0; | |
2994 | } | |
2995 | ||
2996 | static int user_write(void *vkey, void *datum, void *ptr) | |
2997 | { | |
2998 | char *key = vkey; | |
2999 | struct user_datum *usrdatum = datum; | |
3000 | struct policy_data *pd = ptr; | |
3001 | struct policydb *p = pd->p; | |
3002 | void *fp = pd->fp; | |
3003 | __le32 buf[3]; | |
3004 | size_t items, len; | |
3005 | int rc; | |
3006 | ||
3007 | len = strlen(key); | |
3008 | items = 0; | |
3009 | buf[items++] = cpu_to_le32(len); | |
3010 | buf[items++] = cpu_to_le32(usrdatum->value); | |
3011 | if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) | |
3012 | buf[items++] = cpu_to_le32(usrdatum->bounds); | |
5c7001b8 | 3013 | BUG_ON(items > ARRAY_SIZE(buf)); |
cee74f47 EP |
3014 | rc = put_entry(buf, sizeof(u32), items, fp); |
3015 | if (rc) | |
3016 | return rc; | |
3017 | ||
3018 | rc = put_entry(key, 1, len, fp); | |
3019 | if (rc) | |
3020 | return rc; | |
3021 | ||
3022 | rc = ebitmap_write(&usrdatum->roles, fp); | |
3023 | if (rc) | |
3024 | return rc; | |
3025 | ||
3026 | rc = mls_write_range_helper(&usrdatum->range, fp); | |
3027 | if (rc) | |
3028 | return rc; | |
3029 | ||
3030 | rc = mls_write_level(&usrdatum->dfltlevel, fp); | |
3031 | if (rc) | |
3032 | return rc; | |
3033 | ||
3034 | return 0; | |
3035 | } | |
3036 | ||
3037 | static int (*write_f[SYM_NUM]) (void *key, void *datum, | |
3038 | void *datap) = | |
3039 | { | |
3040 | common_write, | |
3041 | class_write, | |
3042 | role_write, | |
3043 | type_write, | |
3044 | user_write, | |
3045 | cond_write_bool, | |
3046 | sens_write, | |
3047 | cat_write, | |
3048 | }; | |
3049 | ||
3050 | static int ocontext_write(struct policydb *p, struct policydb_compat_info *info, | |
3051 | void *fp) | |
3052 | { | |
3053 | unsigned int i, j, rc; | |
3054 | size_t nel, len; | |
3055 | __le32 buf[3]; | |
3056 | u32 nodebuf[8]; | |
3057 | struct ocontext *c; | |
3058 | for (i = 0; i < info->ocon_num; i++) { | |
3059 | nel = 0; | |
3060 | for (c = p->ocontexts[i]; c; c = c->next) | |
3061 | nel++; | |
3062 | buf[0] = cpu_to_le32(nel); | |
3063 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
3064 | if (rc) | |
3065 | return rc; | |
3066 | for (c = p->ocontexts[i]; c; c = c->next) { | |
3067 | switch (i) { | |
3068 | case OCON_ISID: | |
3069 | buf[0] = cpu_to_le32(c->sid[0]); | |
3070 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
3071 | if (rc) | |
3072 | return rc; | |
3073 | rc = context_write(p, &c->context[0], fp); | |
3074 | if (rc) | |
3075 | return rc; | |
3076 | break; | |
3077 | case OCON_FS: | |
3078 | case OCON_NETIF: | |
3079 | len = strlen(c->u.name); | |
3080 | buf[0] = cpu_to_le32(len); | |
3081 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
3082 | if (rc) | |
3083 | return rc; | |
3084 | rc = put_entry(c->u.name, 1, len, fp); | |
3085 | if (rc) | |
3086 | return rc; | |
3087 | rc = context_write(p, &c->context[0], fp); | |
3088 | if (rc) | |
3089 | return rc; | |
3090 | rc = context_write(p, &c->context[1], fp); | |
3091 | if (rc) | |
3092 | return rc; | |
3093 | break; | |
3094 | case OCON_PORT: | |
3095 | buf[0] = cpu_to_le32(c->u.port.protocol); | |
3096 | buf[1] = cpu_to_le32(c->u.port.low_port); | |
3097 | buf[2] = cpu_to_le32(c->u.port.high_port); | |
3098 | rc = put_entry(buf, sizeof(u32), 3, fp); | |
3099 | if (rc) | |
3100 | return rc; | |
3101 | rc = context_write(p, &c->context[0], fp); | |
3102 | if (rc) | |
3103 | return rc; | |
3104 | break; | |
3105 | case OCON_NODE: | |
3106 | nodebuf[0] = c->u.node.addr; /* network order */ | |
3107 | nodebuf[1] = c->u.node.mask; /* network order */ | |
3108 | rc = put_entry(nodebuf, sizeof(u32), 2, fp); | |
3109 | if (rc) | |
3110 | return rc; | |
3111 | rc = context_write(p, &c->context[0], fp); | |
3112 | if (rc) | |
3113 | return rc; | |
3114 | break; | |
3115 | case OCON_FSUSE: | |
3116 | buf[0] = cpu_to_le32(c->v.behavior); | |
3117 | len = strlen(c->u.name); | |
3118 | buf[1] = cpu_to_le32(len); | |
3119 | rc = put_entry(buf, sizeof(u32), 2, fp); | |
3120 | if (rc) | |
3121 | return rc; | |
3122 | rc = put_entry(c->u.name, 1, len, fp); | |
3123 | if (rc) | |
3124 | return rc; | |
3125 | rc = context_write(p, &c->context[0], fp); | |
3126 | if (rc) | |
3127 | return rc; | |
3128 | break; | |
3129 | case OCON_NODE6: | |
3130 | for (j = 0; j < 4; j++) | |
3131 | nodebuf[j] = c->u.node6.addr[j]; /* network order */ | |
3132 | for (j = 0; j < 4; j++) | |
3133 | nodebuf[j + 4] = c->u.node6.mask[j]; /* network order */ | |
3134 | rc = put_entry(nodebuf, sizeof(u32), 8, fp); | |
3135 | if (rc) | |
3136 | return rc; | |
3137 | rc = context_write(p, &c->context[0], fp); | |
3138 | if (rc) | |
3139 | return rc; | |
3140 | break; | |
3141 | } | |
3142 | } | |
3143 | } | |
3144 | return 0; | |
3145 | } | |
3146 | ||
3147 | static int genfs_write(struct policydb *p, void *fp) | |
3148 | { | |
3149 | struct genfs *genfs; | |
3150 | struct ocontext *c; | |
3151 | size_t len; | |
3152 | __le32 buf[1]; | |
3153 | int rc; | |
3154 | ||
3155 | len = 0; | |
3156 | for (genfs = p->genfs; genfs; genfs = genfs->next) | |
3157 | len++; | |
3158 | buf[0] = cpu_to_le32(len); | |
3159 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
3160 | if (rc) | |
3161 | return rc; | |
3162 | for (genfs = p->genfs; genfs; genfs = genfs->next) { | |
3163 | len = strlen(genfs->fstype); | |
3164 | buf[0] = cpu_to_le32(len); | |
3165 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
3166 | if (rc) | |
3167 | return rc; | |
3168 | rc = put_entry(genfs->fstype, 1, len, fp); | |
3169 | if (rc) | |
3170 | return rc; | |
3171 | len = 0; | |
3172 | for (c = genfs->head; c; c = c->next) | |
3173 | len++; | |
3174 | buf[0] = cpu_to_le32(len); | |
3175 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
3176 | if (rc) | |
3177 | return rc; | |
3178 | for (c = genfs->head; c; c = c->next) { | |
3179 | len = strlen(c->u.name); | |
3180 | buf[0] = cpu_to_le32(len); | |
3181 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
3182 | if (rc) | |
3183 | return rc; | |
3184 | rc = put_entry(c->u.name, 1, len, fp); | |
3185 | if (rc) | |
3186 | return rc; | |
3187 | buf[0] = cpu_to_le32(c->v.sclass); | |
3188 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
3189 | if (rc) | |
3190 | return rc; | |
3191 | rc = context_write(p, &c->context[0], fp); | |
3192 | if (rc) | |
3193 | return rc; | |
3194 | } | |
3195 | } | |
3196 | return 0; | |
3197 | } | |
3198 | ||
3f058ef7 | 3199 | static int hashtab_cnt(void *key, void *data, void *ptr) |
cee74f47 EP |
3200 | { |
3201 | int *cnt = ptr; | |
3202 | *cnt = *cnt + 1; | |
3203 | ||
3204 | return 0; | |
3205 | } | |
3206 | ||
3207 | static int range_write_helper(void *key, void *data, void *ptr) | |
3208 | { | |
3209 | __le32 buf[2]; | |
3210 | struct range_trans *rt = key; | |
3211 | struct mls_range *r = data; | |
3212 | struct policy_data *pd = ptr; | |
3213 | void *fp = pd->fp; | |
3214 | struct policydb *p = pd->p; | |
3215 | int rc; | |
3216 | ||
3217 | buf[0] = cpu_to_le32(rt->source_type); | |
3218 | buf[1] = cpu_to_le32(rt->target_type); | |
3219 | rc = put_entry(buf, sizeof(u32), 2, fp); | |
3220 | if (rc) | |
3221 | return rc; | |
3222 | if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) { | |
3223 | buf[0] = cpu_to_le32(rt->target_class); | |
3224 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
3225 | if (rc) | |
3226 | return rc; | |
3227 | } | |
3228 | rc = mls_write_range_helper(r, fp); | |
3229 | if (rc) | |
3230 | return rc; | |
3231 | ||
3232 | return 0; | |
3233 | } | |
3234 | ||
3235 | static int range_write(struct policydb *p, void *fp) | |
3236 | { | |
cee74f47 | 3237 | __le32 buf[1]; |
b138004e | 3238 | int rc, nel; |
cee74f47 EP |
3239 | struct policy_data pd; |
3240 | ||
3241 | pd.p = p; | |
3242 | pd.fp = fp; | |
3243 | ||
3244 | /* count the number of entries in the hashtab */ | |
3245 | nel = 0; | |
3f058ef7 | 3246 | rc = hashtab_map(p->range_tr, hashtab_cnt, &nel); |
cee74f47 EP |
3247 | if (rc) |
3248 | return rc; | |
3249 | ||
3250 | buf[0] = cpu_to_le32(nel); | |
3251 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
3252 | if (rc) | |
3253 | return rc; | |
3254 | ||
3255 | /* actually write all of the entries */ | |
3256 | rc = hashtab_map(p->range_tr, range_write_helper, &pd); | |
3257 | if (rc) | |
3258 | return rc; | |
3259 | ||
3260 | return 0; | |
3261 | } | |
3262 | ||
2463c26d | 3263 | static int filename_write_helper(void *key, void *data, void *ptr) |
652bb9b0 | 3264 | { |
652bb9b0 | 3265 | __le32 buf[4]; |
2463c26d EP |
3266 | struct filename_trans *ft = key; |
3267 | struct filename_trans_datum *otype = data; | |
3268 | void *fp = ptr; | |
652bb9b0 | 3269 | int rc; |
2463c26d | 3270 | u32 len; |
652bb9b0 | 3271 | |
2463c26d EP |
3272 | len = strlen(ft->name); |
3273 | buf[0] = cpu_to_le32(len); | |
652bb9b0 EP |
3274 | rc = put_entry(buf, sizeof(u32), 1, fp); |
3275 | if (rc) | |
3276 | return rc; | |
3277 | ||
2463c26d EP |
3278 | rc = put_entry(ft->name, sizeof(char), len, fp); |
3279 | if (rc) | |
3280 | return rc; | |
652bb9b0 | 3281 | |
9085a642 EP |
3282 | buf[0] = cpu_to_le32(ft->stype); |
3283 | buf[1] = cpu_to_le32(ft->ttype); | |
3284 | buf[2] = cpu_to_le32(ft->tclass); | |
3285 | buf[3] = cpu_to_le32(otype->otype); | |
652bb9b0 | 3286 | |
2463c26d EP |
3287 | rc = put_entry(buf, sizeof(u32), 4, fp); |
3288 | if (rc) | |
3289 | return rc; | |
652bb9b0 | 3290 | |
652bb9b0 EP |
3291 | return 0; |
3292 | } | |
2463c26d EP |
3293 | |
3294 | static int filename_trans_write(struct policydb *p, void *fp) | |
3295 | { | |
3296 | u32 nel; | |
3297 | __le32 buf[1]; | |
3298 | int rc; | |
3299 | ||
ded50988 RL |
3300 | if (p->policyvers < POLICYDB_VERSION_FILENAME_TRANS) |
3301 | return 0; | |
3302 | ||
2463c26d EP |
3303 | nel = 0; |
3304 | rc = hashtab_map(p->filename_trans, hashtab_cnt, &nel); | |
3305 | if (rc) | |
3306 | return rc; | |
3307 | ||
3308 | buf[0] = cpu_to_le32(nel); | |
3309 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
3310 | if (rc) | |
3311 | return rc; | |
3312 | ||
3313 | rc = hashtab_map(p->filename_trans, filename_write_helper, fp); | |
3314 | if (rc) | |
3315 | return rc; | |
3316 | ||
3317 | return 0; | |
3318 | } | |
3319 | ||
cee74f47 EP |
3320 | /* |
3321 | * Write the configuration data in a policy database | |
3322 | * structure to a policy database binary representation | |
3323 | * file. | |
3324 | */ | |
3325 | int policydb_write(struct policydb *p, void *fp) | |
3326 | { | |
3327 | unsigned int i, num_syms; | |
3328 | int rc; | |
3329 | __le32 buf[4]; | |
3330 | u32 config; | |
3331 | size_t len; | |
3332 | struct policydb_compat_info *info; | |
3333 | ||
3334 | /* | |
3335 | * refuse to write policy older than compressed avtab | |
3336 | * to simplify the writer. There are other tests dropped | |
3337 | * since we assume this throughout the writer code. Be | |
3338 | * careful if you ever try to remove this restriction | |
3339 | */ | |
3340 | if (p->policyvers < POLICYDB_VERSION_AVTAB) { | |
3341 | printk(KERN_ERR "SELinux: refusing to write policy version %d." | |
3342 | " Because it is less than version %d\n", p->policyvers, | |
3343 | POLICYDB_VERSION_AVTAB); | |
3344 | return -EINVAL; | |
3345 | } | |
3346 | ||
3347 | config = 0; | |
3348 | if (p->mls_enabled) | |
3349 | config |= POLICYDB_CONFIG_MLS; | |
3350 | ||
3351 | if (p->reject_unknown) | |
3352 | config |= REJECT_UNKNOWN; | |
3353 | if (p->allow_unknown) | |
3354 | config |= ALLOW_UNKNOWN; | |
3355 | ||
3356 | /* Write the magic number and string identifiers. */ | |
3357 | buf[0] = cpu_to_le32(POLICYDB_MAGIC); | |
3358 | len = strlen(POLICYDB_STRING); | |
3359 | buf[1] = cpu_to_le32(len); | |
3360 | rc = put_entry(buf, sizeof(u32), 2, fp); | |
3361 | if (rc) | |
3362 | return rc; | |
3363 | rc = put_entry(POLICYDB_STRING, 1, len, fp); | |
3364 | if (rc) | |
3365 | return rc; | |
3366 | ||
3367 | /* Write the version, config, and table sizes. */ | |
3368 | info = policydb_lookup_compat(p->policyvers); | |
3369 | if (!info) { | |
3370 | printk(KERN_ERR "SELinux: compatibility lookup failed for policy " | |
3371 | "version %d", p->policyvers); | |
9398c7f7 | 3372 | return -EINVAL; |
cee74f47 EP |
3373 | } |
3374 | ||
3375 | buf[0] = cpu_to_le32(p->policyvers); | |
3376 | buf[1] = cpu_to_le32(config); | |
3377 | buf[2] = cpu_to_le32(info->sym_num); | |
3378 | buf[3] = cpu_to_le32(info->ocon_num); | |
3379 | ||
3380 | rc = put_entry(buf, sizeof(u32), 4, fp); | |
3381 | if (rc) | |
3382 | return rc; | |
3383 | ||
3384 | if (p->policyvers >= POLICYDB_VERSION_POLCAP) { | |
3385 | rc = ebitmap_write(&p->policycaps, fp); | |
3386 | if (rc) | |
3387 | return rc; | |
3388 | } | |
3389 | ||
3390 | if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE) { | |
3391 | rc = ebitmap_write(&p->permissive_map, fp); | |
3392 | if (rc) | |
3393 | return rc; | |
3394 | } | |
3395 | ||
3396 | num_syms = info->sym_num; | |
3397 | for (i = 0; i < num_syms; i++) { | |
3398 | struct policy_data pd; | |
3399 | ||
3400 | pd.fp = fp; | |
3401 | pd.p = p; | |
3402 | ||
3403 | buf[0] = cpu_to_le32(p->symtab[i].nprim); | |
3404 | buf[1] = cpu_to_le32(p->symtab[i].table->nel); | |
3405 | ||
3406 | rc = put_entry(buf, sizeof(u32), 2, fp); | |
3407 | if (rc) | |
3408 | return rc; | |
3409 | rc = hashtab_map(p->symtab[i].table, write_f[i], &pd); | |
3410 | if (rc) | |
3411 | return rc; | |
3412 | } | |
3413 | ||
3414 | rc = avtab_write(p, &p->te_avtab, fp); | |
3415 | if (rc) | |
3416 | return rc; | |
3417 | ||
3418 | rc = cond_write_list(p, p->cond_list, fp); | |
3419 | if (rc) | |
3420 | return rc; | |
3421 | ||
c900ff32 | 3422 | rc = role_trans_write(p, fp); |
cee74f47 EP |
3423 | if (rc) |
3424 | return rc; | |
3425 | ||
3426 | rc = role_allow_write(p->role_allow, fp); | |
3427 | if (rc) | |
3428 | return rc; | |
3429 | ||
652bb9b0 EP |
3430 | rc = filename_trans_write(p, fp); |
3431 | if (rc) | |
3432 | return rc; | |
3433 | ||
cee74f47 EP |
3434 | rc = ocontext_write(p, info, fp); |
3435 | if (rc) | |
3436 | return rc; | |
3437 | ||
3438 | rc = genfs_write(p, fp); | |
3439 | if (rc) | |
3440 | return rc; | |
3441 | ||
3442 | rc = range_write(p, fp); | |
3443 | if (rc) | |
3444 | return rc; | |
3445 | ||
3446 | for (i = 0; i < p->p_types.nprim; i++) { | |
3447 | struct ebitmap *e = flex_array_get(p->type_attr_map_array, i); | |
3448 | ||
3449 | BUG_ON(!e); | |
3450 | rc = ebitmap_write(e, fp); | |
3451 | if (rc) | |
3452 | return rc; | |
3453 | } | |
3454 | ||
3455 | return 0; | |
3456 | } |