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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Implementation of the policy database. | |
3 | * | |
4 | * Author : Stephen Smalley, <sds@epoch.ncsc.mil> | |
5 | */ | |
6 | ||
7 | /* | |
8 | * Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com> | |
9 | * | |
10 | * Support for enhanced MLS infrastructure. | |
11 | * | |
12 | * Updated: Frank Mayer <mayerf@tresys.com> and Karl MacMillan <kmacmillan@tresys.com> | |
13 | * | |
2ced3dfd | 14 | * Added conditional policy language extensions |
1da177e4 | 15 | * |
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 | }, | |
fa1aa143 JVS |
151 | { |
152 | .version = POLICYDB_VERSION_XPERMS_IOCTL, | |
153 | .sym_num = SYM_NUM, | |
154 | .ocon_num = OCON_NUM, | |
155 | }, | |
1da177e4 LT |
156 | }; |
157 | ||
158 | static struct policydb_compat_info *policydb_lookup_compat(int version) | |
159 | { | |
160 | int i; | |
161 | struct policydb_compat_info *info = NULL; | |
162 | ||
32725ad8 | 163 | for (i = 0; i < ARRAY_SIZE(policydb_compat); i++) { |
1da177e4 LT |
164 | if (policydb_compat[i].version == version) { |
165 | info = &policydb_compat[i]; | |
166 | break; | |
167 | } | |
168 | } | |
169 | return info; | |
170 | } | |
171 | ||
172 | /* | |
173 | * Initialize the role table. | |
174 | */ | |
175 | static int roles_init(struct policydb *p) | |
176 | { | |
177 | char *key = NULL; | |
178 | int rc; | |
179 | struct role_datum *role; | |
180 | ||
9398c7f7 | 181 | rc = -ENOMEM; |
89d155ef | 182 | role = kzalloc(sizeof(*role), GFP_KERNEL); |
9398c7f7 | 183 | if (!role) |
1da177e4 | 184 | goto out; |
9398c7f7 EP |
185 | |
186 | rc = -EINVAL; | |
1da177e4 | 187 | role->value = ++p->p_roles.nprim; |
9398c7f7 EP |
188 | if (role->value != OBJECT_R_VAL) |
189 | goto out; | |
190 | ||
191 | rc = -ENOMEM; | |
b3139bbc | 192 | key = kstrdup(OBJECT_R, GFP_KERNEL); |
9398c7f7 EP |
193 | if (!key) |
194 | goto out; | |
195 | ||
1da177e4 LT |
196 | rc = hashtab_insert(p->p_roles.table, key, role); |
197 | if (rc) | |
9398c7f7 | 198 | goto out; |
1da177e4 | 199 | |
9398c7f7 EP |
200 | return 0; |
201 | out: | |
1da177e4 | 202 | kfree(key); |
1da177e4 | 203 | kfree(role); |
9398c7f7 | 204 | return rc; |
1da177e4 LT |
205 | } |
206 | ||
2463c26d EP |
207 | static u32 filenametr_hash(struct hashtab *h, const void *k) |
208 | { | |
209 | const struct filename_trans *ft = k; | |
210 | unsigned long hash; | |
211 | unsigned int byte_num; | |
212 | unsigned char focus; | |
213 | ||
214 | hash = ft->stype ^ ft->ttype ^ ft->tclass; | |
215 | ||
216 | byte_num = 0; | |
217 | while ((focus = ft->name[byte_num++])) | |
218 | hash = partial_name_hash(focus, hash); | |
219 | return hash & (h->size - 1); | |
220 | } | |
221 | ||
222 | static int filenametr_cmp(struct hashtab *h, const void *k1, const void *k2) | |
223 | { | |
224 | const struct filename_trans *ft1 = k1; | |
225 | const struct filename_trans *ft2 = k2; | |
226 | int v; | |
227 | ||
228 | v = ft1->stype - ft2->stype; | |
229 | if (v) | |
230 | return v; | |
231 | ||
232 | v = ft1->ttype - ft2->ttype; | |
233 | if (v) | |
234 | return v; | |
235 | ||
236 | v = ft1->tclass - ft2->tclass; | |
237 | if (v) | |
238 | return v; | |
239 | ||
240 | return strcmp(ft1->name, ft2->name); | |
241 | ||
242 | } | |
243 | ||
2f3e82d6 SS |
244 | static u32 rangetr_hash(struct hashtab *h, const void *k) |
245 | { | |
246 | const struct range_trans *key = k; | |
247 | return (key->source_type + (key->target_type << 3) + | |
248 | (key->target_class << 5)) & (h->size - 1); | |
249 | } | |
250 | ||
251 | static int rangetr_cmp(struct hashtab *h, const void *k1, const void *k2) | |
252 | { | |
253 | const struct range_trans *key1 = k1, *key2 = k2; | |
4419aae1 EP |
254 | int v; |
255 | ||
256 | v = key1->source_type - key2->source_type; | |
257 | if (v) | |
258 | return v; | |
259 | ||
260 | v = key1->target_type - key2->target_type; | |
261 | if (v) | |
262 | return v; | |
263 | ||
264 | v = key1->target_class - key2->target_class; | |
265 | ||
266 | return v; | |
2f3e82d6 SS |
267 | } |
268 | ||
1da177e4 LT |
269 | /* |
270 | * Initialize a policy database structure. | |
271 | */ | |
272 | static int policydb_init(struct policydb *p) | |
273 | { | |
274 | int i, rc; | |
275 | ||
276 | memset(p, 0, sizeof(*p)); | |
277 | ||
278 | for (i = 0; i < SYM_NUM; i++) { | |
279 | rc = symtab_init(&p->symtab[i], symtab_sizes[i]); | |
280 | if (rc) | |
9398c7f7 | 281 | goto out; |
1da177e4 LT |
282 | } |
283 | ||
284 | rc = avtab_init(&p->te_avtab); | |
285 | if (rc) | |
9398c7f7 | 286 | goto out; |
1da177e4 LT |
287 | |
288 | rc = roles_init(p); | |
289 | if (rc) | |
9398c7f7 | 290 | goto out; |
1da177e4 LT |
291 | |
292 | rc = cond_policydb_init(p); | |
293 | if (rc) | |
9398c7f7 | 294 | goto out; |
1da177e4 | 295 | |
2463c26d | 296 | p->filename_trans = hashtab_create(filenametr_hash, filenametr_cmp, (1 << 10)); |
6eb4e2b4 DC |
297 | if (!p->filename_trans) { |
298 | rc = -ENOMEM; | |
2463c26d | 299 | goto out; |
6eb4e2b4 | 300 | } |
2463c26d | 301 | |
2f3e82d6 | 302 | p->range_tr = hashtab_create(rangetr_hash, rangetr_cmp, 256); |
6eb4e2b4 DC |
303 | if (!p->range_tr) { |
304 | rc = -ENOMEM; | |
9398c7f7 | 305 | goto out; |
6eb4e2b4 | 306 | } |
2f3e82d6 | 307 | |
03a4c018 | 308 | ebitmap_init(&p->filename_trans_ttypes); |
3bb56b25 | 309 | ebitmap_init(&p->policycaps); |
64dbf074 | 310 | ebitmap_init(&p->permissive_map); |
3bb56b25 | 311 | |
9398c7f7 | 312 | return 0; |
1da177e4 | 313 | out: |
2463c26d EP |
314 | hashtab_destroy(p->filename_trans); |
315 | hashtab_destroy(p->range_tr); | |
1da177e4 LT |
316 | for (i = 0; i < SYM_NUM; i++) |
317 | hashtab_destroy(p->symtab[i].table); | |
9398c7f7 | 318 | return rc; |
1da177e4 LT |
319 | } |
320 | ||
321 | /* | |
322 | * The following *_index functions are used to | |
323 | * define the val_to_name and val_to_struct arrays | |
324 | * in a policy database structure. The val_to_name | |
325 | * arrays are used when converting security context | |
326 | * structures into string representations. The | |
327 | * val_to_struct arrays are used when the attributes | |
328 | * of a class, role, or user are needed. | |
329 | */ | |
330 | ||
331 | static int common_index(void *key, void *datum, void *datap) | |
332 | { | |
333 | struct policydb *p; | |
334 | struct common_datum *comdatum; | |
ac76c05b | 335 | struct flex_array *fa; |
1da177e4 LT |
336 | |
337 | comdatum = datum; | |
338 | p = datap; | |
339 | if (!comdatum->value || comdatum->value > p->p_commons.nprim) | |
340 | return -EINVAL; | |
ac76c05b EP |
341 | |
342 | fa = p->sym_val_to_name[SYM_COMMONS]; | |
343 | if (flex_array_put_ptr(fa, comdatum->value - 1, key, | |
344 | GFP_KERNEL | __GFP_ZERO)) | |
345 | BUG(); | |
1da177e4 LT |
346 | return 0; |
347 | } | |
348 | ||
349 | static int class_index(void *key, void *datum, void *datap) | |
350 | { | |
351 | struct policydb *p; | |
352 | struct class_datum *cladatum; | |
ac76c05b | 353 | struct flex_array *fa; |
1da177e4 LT |
354 | |
355 | cladatum = datum; | |
356 | p = datap; | |
357 | if (!cladatum->value || cladatum->value > p->p_classes.nprim) | |
358 | return -EINVAL; | |
ac76c05b EP |
359 | fa = p->sym_val_to_name[SYM_CLASSES]; |
360 | if (flex_array_put_ptr(fa, cladatum->value - 1, key, | |
361 | GFP_KERNEL | __GFP_ZERO)) | |
362 | BUG(); | |
1da177e4 LT |
363 | p->class_val_to_struct[cladatum->value - 1] = cladatum; |
364 | return 0; | |
365 | } | |
366 | ||
367 | static int role_index(void *key, void *datum, void *datap) | |
368 | { | |
369 | struct policydb *p; | |
370 | struct role_datum *role; | |
ac76c05b | 371 | struct flex_array *fa; |
1da177e4 LT |
372 | |
373 | role = datum; | |
374 | p = datap; | |
d9250dea KK |
375 | if (!role->value |
376 | || role->value > p->p_roles.nprim | |
377 | || role->bounds > p->p_roles.nprim) | |
1da177e4 | 378 | return -EINVAL; |
ac76c05b EP |
379 | |
380 | fa = p->sym_val_to_name[SYM_ROLES]; | |
381 | if (flex_array_put_ptr(fa, role->value - 1, key, | |
382 | GFP_KERNEL | __GFP_ZERO)) | |
383 | BUG(); | |
1da177e4 LT |
384 | p->role_val_to_struct[role->value - 1] = role; |
385 | return 0; | |
386 | } | |
387 | ||
388 | static int type_index(void *key, void *datum, void *datap) | |
389 | { | |
390 | struct policydb *p; | |
391 | struct type_datum *typdatum; | |
ac76c05b | 392 | struct flex_array *fa; |
1da177e4 LT |
393 | |
394 | typdatum = datum; | |
395 | p = datap; | |
396 | ||
397 | if (typdatum->primary) { | |
d9250dea KK |
398 | if (!typdatum->value |
399 | || typdatum->value > p->p_types.nprim | |
400 | || typdatum->bounds > p->p_types.nprim) | |
1da177e4 | 401 | return -EINVAL; |
ac76c05b EP |
402 | fa = p->sym_val_to_name[SYM_TYPES]; |
403 | if (flex_array_put_ptr(fa, typdatum->value - 1, key, | |
404 | GFP_KERNEL | __GFP_ZERO)) | |
405 | BUG(); | |
406 | ||
407 | fa = p->type_val_to_struct_array; | |
408 | if (flex_array_put_ptr(fa, typdatum->value - 1, typdatum, | |
23bdecb0 EP |
409 | GFP_KERNEL | __GFP_ZERO)) |
410 | BUG(); | |
1da177e4 LT |
411 | } |
412 | ||
413 | return 0; | |
414 | } | |
415 | ||
416 | static int user_index(void *key, void *datum, void *datap) | |
417 | { | |
418 | struct policydb *p; | |
419 | struct user_datum *usrdatum; | |
ac76c05b | 420 | struct flex_array *fa; |
1da177e4 LT |
421 | |
422 | usrdatum = datum; | |
423 | p = datap; | |
d9250dea KK |
424 | if (!usrdatum->value |
425 | || usrdatum->value > p->p_users.nprim | |
426 | || usrdatum->bounds > p->p_users.nprim) | |
1da177e4 | 427 | return -EINVAL; |
ac76c05b EP |
428 | |
429 | fa = p->sym_val_to_name[SYM_USERS]; | |
430 | if (flex_array_put_ptr(fa, usrdatum->value - 1, key, | |
431 | GFP_KERNEL | __GFP_ZERO)) | |
432 | BUG(); | |
1da177e4 LT |
433 | p->user_val_to_struct[usrdatum->value - 1] = usrdatum; |
434 | return 0; | |
435 | } | |
436 | ||
437 | static int sens_index(void *key, void *datum, void *datap) | |
438 | { | |
439 | struct policydb *p; | |
440 | struct level_datum *levdatum; | |
ac76c05b | 441 | struct flex_array *fa; |
1da177e4 LT |
442 | |
443 | levdatum = datum; | |
444 | p = datap; | |
445 | ||
446 | if (!levdatum->isalias) { | |
447 | if (!levdatum->level->sens || | |
448 | levdatum->level->sens > p->p_levels.nprim) | |
449 | return -EINVAL; | |
ac76c05b EP |
450 | fa = p->sym_val_to_name[SYM_LEVELS]; |
451 | if (flex_array_put_ptr(fa, levdatum->level->sens - 1, key, | |
452 | GFP_KERNEL | __GFP_ZERO)) | |
453 | BUG(); | |
1da177e4 LT |
454 | } |
455 | ||
456 | return 0; | |
457 | } | |
458 | ||
459 | static int cat_index(void *key, void *datum, void *datap) | |
460 | { | |
461 | struct policydb *p; | |
462 | struct cat_datum *catdatum; | |
ac76c05b | 463 | struct flex_array *fa; |
1da177e4 LT |
464 | |
465 | catdatum = datum; | |
466 | p = datap; | |
467 | ||
468 | if (!catdatum->isalias) { | |
469 | if (!catdatum->value || catdatum->value > p->p_cats.nprim) | |
470 | return -EINVAL; | |
ac76c05b EP |
471 | fa = p->sym_val_to_name[SYM_CATS]; |
472 | if (flex_array_put_ptr(fa, catdatum->value - 1, key, | |
473 | GFP_KERNEL | __GFP_ZERO)) | |
474 | BUG(); | |
1da177e4 LT |
475 | } |
476 | ||
477 | return 0; | |
478 | } | |
479 | ||
480 | static int (*index_f[SYM_NUM]) (void *key, void *datum, void *datap) = | |
481 | { | |
482 | common_index, | |
483 | class_index, | |
484 | role_index, | |
485 | type_index, | |
486 | user_index, | |
487 | cond_index_bool, | |
488 | sens_index, | |
489 | cat_index, | |
490 | }; | |
491 | ||
1da177e4 | 492 | #ifdef DEBUG_HASHES |
be30b16d | 493 | static void hash_eval(struct hashtab *h, const char *hash_name) |
1da177e4 | 494 | { |
be30b16d | 495 | struct hashtab_info info; |
1da177e4 | 496 | |
be30b16d EP |
497 | hashtab_stat(h, &info); |
498 | printk(KERN_DEBUG "SELinux: %s: %d entries and %d/%d buckets used, " | |
499 | "longest chain length %d\n", hash_name, h->nel, | |
500 | info.slots_used, h->size, info.max_chain_len); | |
1da177e4 | 501 | } |
2f3e82d6 | 502 | |
be30b16d | 503 | static void symtab_hash_eval(struct symtab *s) |
2f3e82d6 | 504 | { |
be30b16d | 505 | int i; |
2f3e82d6 | 506 | |
be30b16d EP |
507 | for (i = 0; i < SYM_NUM; i++) |
508 | hash_eval(s[i].table, symtab_name[i]); | |
2f3e82d6 | 509 | } |
be30b16d | 510 | |
2f3e82d6 | 511 | #else |
be30b16d | 512 | static inline void hash_eval(struct hashtab *h, char *hash_name) |
2f3e82d6 SS |
513 | { |
514 | } | |
1da177e4 LT |
515 | #endif |
516 | ||
517 | /* | |
518 | * Define the other val_to_name and val_to_struct arrays | |
519 | * in a policy database structure. | |
520 | * | |
521 | * Caller must clean up on failure. | |
522 | */ | |
1d9bc6dc | 523 | static int policydb_index(struct policydb *p) |
1da177e4 | 524 | { |
9398c7f7 | 525 | int i, rc; |
1da177e4 | 526 | |
454d972c | 527 | printk(KERN_DEBUG "SELinux: %d users, %d roles, %d types, %d bools", |
1da177e4 | 528 | p->p_users.nprim, p->p_roles.nprim, p->p_types.nprim, p->p_bools.nprim); |
0719aaf5 | 529 | if (p->mls_enabled) |
4bcc595c | 530 | printk(KERN_CONT ", %d sens, %d cats", p->p_levels.nprim, |
1da177e4 | 531 | p->p_cats.nprim); |
4bcc595c | 532 | printk(KERN_CONT "\n"); |
1da177e4 | 533 | |
454d972c | 534 | printk(KERN_DEBUG "SELinux: %d classes, %d rules\n", |
1da177e4 LT |
535 | p->p_classes.nprim, p->te_avtab.nel); |
536 | ||
537 | #ifdef DEBUG_HASHES | |
538 | avtab_hash_eval(&p->te_avtab, "rules"); | |
539 | symtab_hash_eval(p->symtab); | |
540 | #endif | |
541 | ||
1d9bc6dc EP |
542 | rc = -ENOMEM; |
543 | p->class_val_to_struct = | |
3bc7bcf6 | 544 | kzalloc(p->p_classes.nprim * sizeof(*(p->class_val_to_struct)), |
1d9bc6dc EP |
545 | GFP_KERNEL); |
546 | if (!p->class_val_to_struct) | |
547 | goto out; | |
548 | ||
9398c7f7 | 549 | rc = -ENOMEM; |
1da177e4 | 550 | p->role_val_to_struct = |
3bc7bcf6 | 551 | kzalloc(p->p_roles.nprim * sizeof(*(p->role_val_to_struct)), |
2ced3dfd | 552 | GFP_KERNEL); |
9398c7f7 | 553 | if (!p->role_val_to_struct) |
1da177e4 | 554 | goto out; |
1da177e4 | 555 | |
9398c7f7 | 556 | rc = -ENOMEM; |
1da177e4 | 557 | p->user_val_to_struct = |
3bc7bcf6 | 558 | kzalloc(p->p_users.nprim * sizeof(*(p->user_val_to_struct)), |
2ced3dfd | 559 | GFP_KERNEL); |
9398c7f7 | 560 | if (!p->user_val_to_struct) |
1da177e4 | 561 | goto out; |
1da177e4 | 562 | |
23bdecb0 | 563 | /* Yes, I want the sizeof the pointer, not the structure */ |
9398c7f7 | 564 | rc = -ENOMEM; |
23bdecb0 EP |
565 | p->type_val_to_struct_array = flex_array_alloc(sizeof(struct type_datum *), |
566 | p->p_types.nprim, | |
567 | GFP_KERNEL | __GFP_ZERO); | |
568 | if (!p->type_val_to_struct_array) | |
569 | goto out; | |
570 | ||
571 | rc = flex_array_prealloc(p->type_val_to_struct_array, 0, | |
5a3ea878 | 572 | p->p_types.nprim, GFP_KERNEL | __GFP_ZERO); |
23bdecb0 | 573 | if (rc) |
d9250dea | 574 | goto out; |
d9250dea | 575 | |
3ac285ff DB |
576 | rc = cond_init_bool_indexes(p); |
577 | if (rc) | |
1da177e4 | 578 | goto out; |
1da177e4 | 579 | |
1d9bc6dc | 580 | for (i = 0; i < SYM_NUM; i++) { |
9398c7f7 | 581 | rc = -ENOMEM; |
ac76c05b EP |
582 | p->sym_val_to_name[i] = flex_array_alloc(sizeof(char *), |
583 | p->symtab[i].nprim, | |
584 | GFP_KERNEL | __GFP_ZERO); | |
9398c7f7 | 585 | if (!p->sym_val_to_name[i]) |
1da177e4 | 586 | goto out; |
ac76c05b EP |
587 | |
588 | rc = flex_array_prealloc(p->sym_val_to_name[i], | |
5a3ea878 | 589 | 0, p->symtab[i].nprim, |
ac76c05b EP |
590 | GFP_KERNEL | __GFP_ZERO); |
591 | if (rc) | |
592 | goto out; | |
593 | ||
1da177e4 LT |
594 | rc = hashtab_map(p->symtab[i].table, index_f[i], p); |
595 | if (rc) | |
596 | goto out; | |
597 | } | |
9398c7f7 | 598 | rc = 0; |
1da177e4 LT |
599 | out: |
600 | return rc; | |
601 | } | |
602 | ||
603 | /* | |
604 | * The following *_destroy functions are used to | |
605 | * free any memory allocated for each kind of | |
606 | * symbol data in the policy database. | |
607 | */ | |
608 | ||
609 | static int perm_destroy(void *key, void *datum, void *p) | |
610 | { | |
611 | kfree(key); | |
612 | kfree(datum); | |
613 | return 0; | |
614 | } | |
615 | ||
616 | static int common_destroy(void *key, void *datum, void *p) | |
617 | { | |
618 | struct common_datum *comdatum; | |
619 | ||
620 | kfree(key); | |
9398c7f7 EP |
621 | if (datum) { |
622 | comdatum = datum; | |
623 | hashtab_map(comdatum->permissions.table, perm_destroy, NULL); | |
624 | hashtab_destroy(comdatum->permissions.table); | |
625 | } | |
1da177e4 LT |
626 | kfree(datum); |
627 | return 0; | |
628 | } | |
629 | ||
a660bec1 RH |
630 | static void constraint_expr_destroy(struct constraint_expr *expr) |
631 | { | |
632 | if (expr) { | |
633 | ebitmap_destroy(&expr->names); | |
634 | if (expr->type_names) { | |
635 | ebitmap_destroy(&expr->type_names->types); | |
636 | ebitmap_destroy(&expr->type_names->negset); | |
637 | kfree(expr->type_names); | |
638 | } | |
639 | kfree(expr); | |
640 | } | |
641 | } | |
642 | ||
6cbda6b6 | 643 | static int cls_destroy(void *key, void *datum, void *p) |
1da177e4 LT |
644 | { |
645 | struct class_datum *cladatum; | |
646 | struct constraint_node *constraint, *ctemp; | |
647 | struct constraint_expr *e, *etmp; | |
648 | ||
649 | kfree(key); | |
9398c7f7 EP |
650 | if (datum) { |
651 | cladatum = datum; | |
652 | hashtab_map(cladatum->permissions.table, perm_destroy, NULL); | |
653 | hashtab_destroy(cladatum->permissions.table); | |
654 | constraint = cladatum->constraints; | |
655 | while (constraint) { | |
656 | e = constraint->expr; | |
657 | while (e) { | |
9398c7f7 EP |
658 | etmp = e; |
659 | e = e->next; | |
a660bec1 | 660 | constraint_expr_destroy(etmp); |
9398c7f7 EP |
661 | } |
662 | ctemp = constraint; | |
663 | constraint = constraint->next; | |
664 | kfree(ctemp); | |
1da177e4 | 665 | } |
9398c7f7 EP |
666 | |
667 | constraint = cladatum->validatetrans; | |
668 | while (constraint) { | |
669 | e = constraint->expr; | |
670 | while (e) { | |
9398c7f7 EP |
671 | etmp = e; |
672 | e = e->next; | |
a660bec1 | 673 | constraint_expr_destroy(etmp); |
9398c7f7 EP |
674 | } |
675 | ctemp = constraint; | |
676 | constraint = constraint->next; | |
677 | kfree(ctemp); | |
1da177e4 | 678 | } |
9398c7f7 EP |
679 | kfree(cladatum->comkey); |
680 | } | |
1da177e4 LT |
681 | kfree(datum); |
682 | return 0; | |
683 | } | |
684 | ||
685 | static int role_destroy(void *key, void *datum, void *p) | |
686 | { | |
687 | struct role_datum *role; | |
688 | ||
689 | kfree(key); | |
9398c7f7 EP |
690 | if (datum) { |
691 | role = datum; | |
692 | ebitmap_destroy(&role->dominates); | |
693 | ebitmap_destroy(&role->types); | |
694 | } | |
1da177e4 LT |
695 | kfree(datum); |
696 | return 0; | |
697 | } | |
698 | ||
699 | static int type_destroy(void *key, void *datum, void *p) | |
700 | { | |
701 | kfree(key); | |
702 | kfree(datum); | |
703 | return 0; | |
704 | } | |
705 | ||
706 | static int user_destroy(void *key, void *datum, void *p) | |
707 | { | |
708 | struct user_datum *usrdatum; | |
709 | ||
710 | kfree(key); | |
9398c7f7 EP |
711 | if (datum) { |
712 | usrdatum = datum; | |
713 | ebitmap_destroy(&usrdatum->roles); | |
714 | ebitmap_destroy(&usrdatum->range.level[0].cat); | |
715 | ebitmap_destroy(&usrdatum->range.level[1].cat); | |
716 | ebitmap_destroy(&usrdatum->dfltlevel.cat); | |
717 | } | |
1da177e4 LT |
718 | kfree(datum); |
719 | return 0; | |
720 | } | |
721 | ||
722 | static int sens_destroy(void *key, void *datum, void *p) | |
723 | { | |
724 | struct level_datum *levdatum; | |
725 | ||
726 | kfree(key); | |
9398c7f7 EP |
727 | if (datum) { |
728 | levdatum = datum; | |
729 | ebitmap_destroy(&levdatum->level->cat); | |
730 | kfree(levdatum->level); | |
731 | } | |
1da177e4 LT |
732 | kfree(datum); |
733 | return 0; | |
734 | } | |
735 | ||
736 | static int cat_destroy(void *key, void *datum, void *p) | |
737 | { | |
738 | kfree(key); | |
739 | kfree(datum); | |
740 | return 0; | |
741 | } | |
742 | ||
743 | static int (*destroy_f[SYM_NUM]) (void *key, void *datum, void *datap) = | |
744 | { | |
745 | common_destroy, | |
6cbda6b6 | 746 | cls_destroy, |
1da177e4 LT |
747 | role_destroy, |
748 | type_destroy, | |
749 | user_destroy, | |
750 | cond_destroy_bool, | |
751 | sens_destroy, | |
752 | cat_destroy, | |
753 | }; | |
754 | ||
2463c26d EP |
755 | static int filenametr_destroy(void *key, void *datum, void *p) |
756 | { | |
757 | struct filename_trans *ft = key; | |
758 | kfree(ft->name); | |
759 | kfree(key); | |
760 | kfree(datum); | |
761 | cond_resched(); | |
762 | return 0; | |
763 | } | |
764 | ||
2f3e82d6 SS |
765 | static int range_tr_destroy(void *key, void *datum, void *p) |
766 | { | |
767 | struct mls_range *rt = datum; | |
768 | kfree(key); | |
769 | ebitmap_destroy(&rt->level[0].cat); | |
770 | ebitmap_destroy(&rt->level[1].cat); | |
771 | kfree(datum); | |
772 | cond_resched(); | |
773 | return 0; | |
774 | } | |
775 | ||
1da177e4 LT |
776 | static void ocontext_destroy(struct ocontext *c, int i) |
777 | { | |
d1b43547 EP |
778 | if (!c) |
779 | return; | |
780 | ||
1da177e4 LT |
781 | context_destroy(&c->context[0]); |
782 | context_destroy(&c->context[1]); | |
783 | if (i == OCON_ISID || i == OCON_FS || | |
784 | i == OCON_NETIF || i == OCON_FSUSE) | |
785 | kfree(c->u.name); | |
786 | kfree(c); | |
787 | } | |
788 | ||
789 | /* | |
790 | * Free any memory allocated by a policy database structure. | |
791 | */ | |
792 | void policydb_destroy(struct policydb *p) | |
793 | { | |
794 | struct ocontext *c, *ctmp; | |
795 | struct genfs *g, *gtmp; | |
796 | int i; | |
782ebb99 SS |
797 | struct role_allow *ra, *lra = NULL; |
798 | struct role_trans *tr, *ltr = NULL; | |
1da177e4 LT |
799 | |
800 | for (i = 0; i < SYM_NUM; i++) { | |
9dc99780 | 801 | cond_resched(); |
1da177e4 LT |
802 | hashtab_map(p->symtab[i].table, destroy_f[i], NULL); |
803 | hashtab_destroy(p->symtab[i].table); | |
804 | } | |
805 | ||
ac76c05b EP |
806 | for (i = 0; i < SYM_NUM; i++) { |
807 | if (p->sym_val_to_name[i]) | |
808 | flex_array_free(p->sym_val_to_name[i]); | |
809 | } | |
1da177e4 | 810 | |
9a5f04bf JJ |
811 | kfree(p->class_val_to_struct); |
812 | kfree(p->role_val_to_struct); | |
813 | kfree(p->user_val_to_struct); | |
23bdecb0 EP |
814 | if (p->type_val_to_struct_array) |
815 | flex_array_free(p->type_val_to_struct_array); | |
1da177e4 LT |
816 | |
817 | avtab_destroy(&p->te_avtab); | |
818 | ||
819 | for (i = 0; i < OCON_NUM; i++) { | |
9dc99780 | 820 | cond_resched(); |
1da177e4 LT |
821 | c = p->ocontexts[i]; |
822 | while (c) { | |
823 | ctmp = c; | |
824 | c = c->next; | |
2ced3dfd | 825 | ocontext_destroy(ctmp, i); |
1da177e4 | 826 | } |
6e8c751e | 827 | p->ocontexts[i] = NULL; |
1da177e4 LT |
828 | } |
829 | ||
830 | g = p->genfs; | |
831 | while (g) { | |
9dc99780 | 832 | cond_resched(); |
1da177e4 LT |
833 | kfree(g->fstype); |
834 | c = g->head; | |
835 | while (c) { | |
836 | ctmp = c; | |
837 | c = c->next; | |
2ced3dfd | 838 | ocontext_destroy(ctmp, OCON_FSUSE); |
1da177e4 LT |
839 | } |
840 | gtmp = g; | |
841 | g = g->next; | |
842 | kfree(gtmp); | |
843 | } | |
6e8c751e | 844 | p->genfs = NULL; |
1da177e4 LT |
845 | |
846 | cond_policydb_destroy(p); | |
847 | ||
782ebb99 | 848 | for (tr = p->role_tr; tr; tr = tr->next) { |
9dc99780 | 849 | cond_resched(); |
a7f988ba | 850 | kfree(ltr); |
782ebb99 SS |
851 | ltr = tr; |
852 | } | |
a7f988ba | 853 | kfree(ltr); |
782ebb99 | 854 | |
2ced3dfd | 855 | for (ra = p->role_allow; ra; ra = ra->next) { |
9dc99780 | 856 | cond_resched(); |
a7f988ba | 857 | kfree(lra); |
782ebb99 SS |
858 | lra = ra; |
859 | } | |
a7f988ba | 860 | kfree(lra); |
782ebb99 | 861 | |
2463c26d EP |
862 | hashtab_map(p->filename_trans, filenametr_destroy, NULL); |
863 | hashtab_destroy(p->filename_trans); | |
864 | ||
2f3e82d6 SS |
865 | hashtab_map(p->range_tr, range_tr_destroy, NULL); |
866 | hashtab_destroy(p->range_tr); | |
782ebb99 | 867 | |
6371dcd3 EP |
868 | if (p->type_attr_map_array) { |
869 | for (i = 0; i < p->p_types.nprim; i++) { | |
870 | struct ebitmap *e; | |
871 | ||
872 | e = flex_array_get(p->type_attr_map_array, i); | |
873 | if (!e) | |
874 | continue; | |
875 | ebitmap_destroy(e); | |
876 | } | |
877 | flex_array_free(p->type_attr_map_array); | |
282c1f5e | 878 | } |
652bb9b0 | 879 | |
03a4c018 | 880 | ebitmap_destroy(&p->filename_trans_ttypes); |
3bb56b25 | 881 | ebitmap_destroy(&p->policycaps); |
64dbf074 | 882 | ebitmap_destroy(&p->permissive_map); |
3f12070e | 883 | |
1da177e4 LT |
884 | return; |
885 | } | |
886 | ||
887 | /* | |
888 | * Load the initial SIDs specified in a policy database | |
889 | * structure into a SID table. | |
890 | */ | |
891 | int policydb_load_isids(struct policydb *p, struct sidtab *s) | |
892 | { | |
893 | struct ocontext *head, *c; | |
894 | int rc; | |
895 | ||
896 | rc = sidtab_init(s); | |
897 | if (rc) { | |
454d972c | 898 | printk(KERN_ERR "SELinux: out of memory on SID table init\n"); |
1da177e4 LT |
899 | goto out; |
900 | } | |
901 | ||
902 | head = p->ocontexts[OCON_ISID]; | |
903 | for (c = head; c; c = c->next) { | |
9398c7f7 | 904 | rc = -EINVAL; |
1da177e4 | 905 | if (!c->context[0].user) { |
9398c7f7 EP |
906 | printk(KERN_ERR "SELinux: SID %s was never defined.\n", |
907 | c->u.name); | |
1da177e4 LT |
908 | goto out; |
909 | } | |
9398c7f7 EP |
910 | |
911 | rc = sidtab_insert(s, c->sid[0], &c->context[0]); | |
912 | if (rc) { | |
913 | printk(KERN_ERR "SELinux: unable to load initial SID %s.\n", | |
914 | c->u.name); | |
1da177e4 LT |
915 | goto out; |
916 | } | |
917 | } | |
9398c7f7 | 918 | rc = 0; |
1da177e4 LT |
919 | out: |
920 | return rc; | |
921 | } | |
922 | ||
45e5421e SS |
923 | int policydb_class_isvalid(struct policydb *p, unsigned int class) |
924 | { | |
925 | if (!class || class > p->p_classes.nprim) | |
926 | return 0; | |
927 | return 1; | |
928 | } | |
929 | ||
930 | int policydb_role_isvalid(struct policydb *p, unsigned int role) | |
931 | { | |
932 | if (!role || role > p->p_roles.nprim) | |
933 | return 0; | |
934 | return 1; | |
935 | } | |
936 | ||
937 | int policydb_type_isvalid(struct policydb *p, unsigned int type) | |
938 | { | |
939 | if (!type || type > p->p_types.nprim) | |
940 | return 0; | |
941 | return 1; | |
942 | } | |
943 | ||
1da177e4 LT |
944 | /* |
945 | * Return 1 if the fields in the security context | |
946 | * structure `c' are valid. Return 0 otherwise. | |
947 | */ | |
948 | int policydb_context_isvalid(struct policydb *p, struct context *c) | |
949 | { | |
950 | struct role_datum *role; | |
951 | struct user_datum *usrdatum; | |
952 | ||
953 | if (!c->role || c->role > p->p_roles.nprim) | |
954 | return 0; | |
955 | ||
956 | if (!c->user || c->user > p->p_users.nprim) | |
957 | return 0; | |
958 | ||
959 | if (!c->type || c->type > p->p_types.nprim) | |
960 | return 0; | |
961 | ||
962 | if (c->role != OBJECT_R_VAL) { | |
963 | /* | |
964 | * Role must be authorized for the type. | |
965 | */ | |
966 | role = p->role_val_to_struct[c->role - 1]; | |
3bc7bcf6 | 967 | if (!role || !ebitmap_get_bit(&role->types, c->type - 1)) |
1da177e4 LT |
968 | /* role may not be associated with type */ |
969 | return 0; | |
970 | ||
971 | /* | |
972 | * User must be authorized for the role. | |
973 | */ | |
974 | usrdatum = p->user_val_to_struct[c->user - 1]; | |
975 | if (!usrdatum) | |
976 | return 0; | |
977 | ||
9398c7f7 | 978 | if (!ebitmap_get_bit(&usrdatum->roles, c->role - 1)) |
1da177e4 LT |
979 | /* user may not be associated with role */ |
980 | return 0; | |
981 | } | |
982 | ||
983 | if (!mls_context_isvalid(p, c)) | |
984 | return 0; | |
985 | ||
986 | return 1; | |
987 | } | |
988 | ||
989 | /* | |
990 | * Read a MLS range structure from a policydb binary | |
991 | * representation file. | |
992 | */ | |
993 | static int mls_read_range_helper(struct mls_range *r, void *fp) | |
994 | { | |
b5bf6c55 AD |
995 | __le32 buf[2]; |
996 | u32 items; | |
1da177e4 LT |
997 | int rc; |
998 | ||
999 | rc = next_entry(buf, fp, sizeof(u32)); | |
9398c7f7 | 1000 | if (rc) |
1da177e4 LT |
1001 | goto out; |
1002 | ||
9398c7f7 | 1003 | rc = -EINVAL; |
1da177e4 LT |
1004 | items = le32_to_cpu(buf[0]); |
1005 | if (items > ARRAY_SIZE(buf)) { | |
454d972c | 1006 | printk(KERN_ERR "SELinux: mls: range overflow\n"); |
1da177e4 LT |
1007 | goto out; |
1008 | } | |
9398c7f7 | 1009 | |
1da177e4 | 1010 | rc = next_entry(buf, fp, sizeof(u32) * items); |
9398c7f7 | 1011 | if (rc) { |
454d972c | 1012 | printk(KERN_ERR "SELinux: mls: truncated range\n"); |
1da177e4 LT |
1013 | goto out; |
1014 | } | |
9398c7f7 | 1015 | |
1da177e4 LT |
1016 | r->level[0].sens = le32_to_cpu(buf[0]); |
1017 | if (items > 1) | |
1018 | r->level[1].sens = le32_to_cpu(buf[1]); | |
1019 | else | |
1020 | r->level[1].sens = r->level[0].sens; | |
1021 | ||
1022 | rc = ebitmap_read(&r->level[0].cat, fp); | |
1023 | if (rc) { | |
9398c7f7 | 1024 | printk(KERN_ERR "SELinux: mls: error reading low categories\n"); |
1da177e4 LT |
1025 | goto out; |
1026 | } | |
1027 | if (items > 1) { | |
1028 | rc = ebitmap_read(&r->level[1].cat, fp); | |
1029 | if (rc) { | |
9398c7f7 | 1030 | printk(KERN_ERR "SELinux: mls: error reading high categories\n"); |
1da177e4 LT |
1031 | goto bad_high; |
1032 | } | |
1033 | } else { | |
1034 | rc = ebitmap_cpy(&r->level[1].cat, &r->level[0].cat); | |
1035 | if (rc) { | |
454d972c | 1036 | printk(KERN_ERR "SELinux: mls: out of memory\n"); |
1da177e4 LT |
1037 | goto bad_high; |
1038 | } | |
1039 | } | |
1040 | ||
9398c7f7 | 1041 | return 0; |
1da177e4 LT |
1042 | bad_high: |
1043 | ebitmap_destroy(&r->level[0].cat); | |
9398c7f7 EP |
1044 | out: |
1045 | return rc; | |
1da177e4 LT |
1046 | } |
1047 | ||
1048 | /* | |
1049 | * Read and validate a security context structure | |
1050 | * from a policydb binary representation file. | |
1051 | */ | |
1052 | static int context_read_and_validate(struct context *c, | |
1053 | struct policydb *p, | |
1054 | void *fp) | |
1055 | { | |
b5bf6c55 | 1056 | __le32 buf[3]; |
1da177e4 LT |
1057 | int rc; |
1058 | ||
1059 | rc = next_entry(buf, fp, sizeof buf); | |
9398c7f7 | 1060 | if (rc) { |
454d972c | 1061 | printk(KERN_ERR "SELinux: context truncated\n"); |
1da177e4 LT |
1062 | goto out; |
1063 | } | |
1064 | c->user = le32_to_cpu(buf[0]); | |
1065 | c->role = le32_to_cpu(buf[1]); | |
1066 | c->type = le32_to_cpu(buf[2]); | |
1067 | if (p->policyvers >= POLICYDB_VERSION_MLS) { | |
9398c7f7 EP |
1068 | rc = mls_read_range_helper(&c->range, fp); |
1069 | if (rc) { | |
1070 | printk(KERN_ERR "SELinux: error reading MLS range of context\n"); | |
1da177e4 LT |
1071 | goto out; |
1072 | } | |
1073 | } | |
1074 | ||
9398c7f7 | 1075 | rc = -EINVAL; |
1da177e4 | 1076 | if (!policydb_context_isvalid(p, c)) { |
454d972c | 1077 | printk(KERN_ERR "SELinux: invalid security context\n"); |
1da177e4 | 1078 | context_destroy(c); |
9398c7f7 | 1079 | goto out; |
1da177e4 | 1080 | } |
9398c7f7 | 1081 | rc = 0; |
1da177e4 LT |
1082 | out: |
1083 | return rc; | |
1084 | } | |
1085 | ||
1086 | /* | |
1087 | * The following *_read functions are used to | |
1088 | * read the symbol data from a policy database | |
1089 | * binary representation file. | |
1090 | */ | |
1091 | ||
4b6f405f NK |
1092 | static int str_read(char **strp, gfp_t flags, void *fp, u32 len) |
1093 | { | |
1094 | int rc; | |
1095 | char *str; | |
1096 | ||
7c686af0 WR |
1097 | if ((len == 0) || (len == (u32)-1)) |
1098 | return -EINVAL; | |
1099 | ||
4b6f405f NK |
1100 | str = kmalloc(len + 1, flags); |
1101 | if (!str) | |
1102 | return -ENOMEM; | |
1103 | ||
1104 | /* it's expected the caller should free the str */ | |
1105 | *strp = str; | |
1106 | ||
1107 | rc = next_entry(str, fp, len); | |
1108 | if (rc) | |
1109 | return rc; | |
1110 | ||
1111 | str[len] = '\0'; | |
1112 | return 0; | |
1113 | } | |
1114 | ||
1da177e4 LT |
1115 | static int perm_read(struct policydb *p, struct hashtab *h, void *fp) |
1116 | { | |
1117 | char *key = NULL; | |
1118 | struct perm_datum *perdatum; | |
1119 | int rc; | |
b5bf6c55 AD |
1120 | __le32 buf[2]; |
1121 | u32 len; | |
1da177e4 | 1122 | |
9398c7f7 | 1123 | rc = -ENOMEM; |
89d155ef | 1124 | perdatum = kzalloc(sizeof(*perdatum), GFP_KERNEL); |
9398c7f7 EP |
1125 | if (!perdatum) |
1126 | goto bad; | |
1da177e4 LT |
1127 | |
1128 | rc = next_entry(buf, fp, sizeof buf); | |
9398c7f7 | 1129 | if (rc) |
1da177e4 LT |
1130 | goto bad; |
1131 | ||
1132 | len = le32_to_cpu(buf[0]); | |
1133 | perdatum->value = le32_to_cpu(buf[1]); | |
1134 | ||
4b6f405f | 1135 | rc = str_read(&key, GFP_KERNEL, fp, len); |
9398c7f7 | 1136 | if (rc) |
1da177e4 | 1137 | goto bad; |
1da177e4 LT |
1138 | |
1139 | rc = hashtab_insert(h, key, perdatum); | |
1140 | if (rc) | |
1141 | goto bad; | |
9398c7f7 EP |
1142 | |
1143 | return 0; | |
1da177e4 LT |
1144 | bad: |
1145 | perm_destroy(key, perdatum, NULL); | |
9398c7f7 | 1146 | return rc; |
1da177e4 LT |
1147 | } |
1148 | ||
1149 | static int common_read(struct policydb *p, struct hashtab *h, void *fp) | |
1150 | { | |
1151 | char *key = NULL; | |
1152 | struct common_datum *comdatum; | |
b5bf6c55 AD |
1153 | __le32 buf[4]; |
1154 | u32 len, nel; | |
1da177e4 LT |
1155 | int i, rc; |
1156 | ||
9398c7f7 | 1157 | rc = -ENOMEM; |
89d155ef | 1158 | comdatum = kzalloc(sizeof(*comdatum), GFP_KERNEL); |
9398c7f7 EP |
1159 | if (!comdatum) |
1160 | goto bad; | |
1da177e4 LT |
1161 | |
1162 | rc = next_entry(buf, fp, sizeof buf); | |
9398c7f7 | 1163 | if (rc) |
1da177e4 LT |
1164 | goto bad; |
1165 | ||
1166 | len = le32_to_cpu(buf[0]); | |
1167 | comdatum->value = le32_to_cpu(buf[1]); | |
1168 | ||
1169 | rc = symtab_init(&comdatum->permissions, PERM_SYMTAB_SIZE); | |
1170 | if (rc) | |
1171 | goto bad; | |
1172 | comdatum->permissions.nprim = le32_to_cpu(buf[2]); | |
1173 | nel = le32_to_cpu(buf[3]); | |
1174 | ||
4b6f405f | 1175 | rc = str_read(&key, GFP_KERNEL, fp, len); |
9398c7f7 | 1176 | if (rc) |
1da177e4 | 1177 | goto bad; |
1da177e4 LT |
1178 | |
1179 | for (i = 0; i < nel; i++) { | |
1180 | rc = perm_read(p, comdatum->permissions.table, fp); | |
1181 | if (rc) | |
1182 | goto bad; | |
1183 | } | |
1184 | ||
1185 | rc = hashtab_insert(h, key, comdatum); | |
1186 | if (rc) | |
1187 | goto bad; | |
9398c7f7 | 1188 | return 0; |
1da177e4 LT |
1189 | bad: |
1190 | common_destroy(key, comdatum, NULL); | |
9398c7f7 | 1191 | return rc; |
1da177e4 LT |
1192 | } |
1193 | ||
a660bec1 RH |
1194 | static void type_set_init(struct type_set *t) |
1195 | { | |
1196 | ebitmap_init(&t->types); | |
1197 | ebitmap_init(&t->negset); | |
1198 | } | |
1199 | ||
1200 | static int type_set_read(struct type_set *t, void *fp) | |
1201 | { | |
1202 | __le32 buf[1]; | |
1203 | int rc; | |
1204 | ||
1205 | if (ebitmap_read(&t->types, fp)) | |
1206 | return -EINVAL; | |
1207 | if (ebitmap_read(&t->negset, fp)) | |
1208 | return -EINVAL; | |
1209 | ||
1210 | rc = next_entry(buf, fp, sizeof(u32)); | |
1211 | if (rc < 0) | |
1212 | return -EINVAL; | |
1213 | t->flags = le32_to_cpu(buf[0]); | |
1214 | ||
1215 | return 0; | |
1216 | } | |
1217 | ||
1218 | ||
1219 | static int read_cons_helper(struct policydb *p, | |
1220 | struct constraint_node **nodep, | |
1221 | int ncons, int allowxtarget, void *fp) | |
1da177e4 LT |
1222 | { |
1223 | struct constraint_node *c, *lc; | |
1224 | struct constraint_expr *e, *le; | |
b5bf6c55 AD |
1225 | __le32 buf[3]; |
1226 | u32 nexpr; | |
1da177e4 LT |
1227 | int rc, i, j, depth; |
1228 | ||
1229 | lc = NULL; | |
1230 | for (i = 0; i < ncons; i++) { | |
89d155ef | 1231 | c = kzalloc(sizeof(*c), GFP_KERNEL); |
1da177e4 LT |
1232 | if (!c) |
1233 | return -ENOMEM; | |
1da177e4 | 1234 | |
2ced3dfd | 1235 | if (lc) |
1da177e4 | 1236 | lc->next = c; |
2ced3dfd | 1237 | else |
1da177e4 | 1238 | *nodep = c; |
1da177e4 LT |
1239 | |
1240 | rc = next_entry(buf, fp, (sizeof(u32) * 2)); | |
9398c7f7 | 1241 | if (rc) |
1da177e4 LT |
1242 | return rc; |
1243 | c->permissions = le32_to_cpu(buf[0]); | |
1244 | nexpr = le32_to_cpu(buf[1]); | |
1245 | le = NULL; | |
1246 | depth = -1; | |
1247 | for (j = 0; j < nexpr; j++) { | |
89d155ef | 1248 | e = kzalloc(sizeof(*e), GFP_KERNEL); |
1da177e4 LT |
1249 | if (!e) |
1250 | return -ENOMEM; | |
1da177e4 | 1251 | |
2ced3dfd | 1252 | if (le) |
1da177e4 | 1253 | le->next = e; |
2ced3dfd | 1254 | else |
1da177e4 | 1255 | c->expr = e; |
1da177e4 LT |
1256 | |
1257 | rc = next_entry(buf, fp, (sizeof(u32) * 3)); | |
9398c7f7 | 1258 | if (rc) |
1da177e4 LT |
1259 | return rc; |
1260 | e->expr_type = le32_to_cpu(buf[0]); | |
1261 | e->attr = le32_to_cpu(buf[1]); | |
1262 | e->op = le32_to_cpu(buf[2]); | |
1263 | ||
1264 | switch (e->expr_type) { | |
1265 | case CEXPR_NOT: | |
1266 | if (depth < 0) | |
1267 | return -EINVAL; | |
1268 | break; | |
1269 | case CEXPR_AND: | |
1270 | case CEXPR_OR: | |
1271 | if (depth < 1) | |
1272 | return -EINVAL; | |
1273 | depth--; | |
1274 | break; | |
1275 | case CEXPR_ATTR: | |
1276 | if (depth == (CEXPR_MAXDEPTH - 1)) | |
1277 | return -EINVAL; | |
1278 | depth++; | |
1279 | break; | |
1280 | case CEXPR_NAMES: | |
1281 | if (!allowxtarget && (e->attr & CEXPR_XTARGET)) | |
1282 | return -EINVAL; | |
1283 | if (depth == (CEXPR_MAXDEPTH - 1)) | |
1284 | return -EINVAL; | |
1285 | depth++; | |
9398c7f7 EP |
1286 | rc = ebitmap_read(&e->names, fp); |
1287 | if (rc) | |
1288 | return rc; | |
a660bec1 RH |
1289 | if (p->policyvers >= |
1290 | POLICYDB_VERSION_CONSTRAINT_NAMES) { | |
1291 | e->type_names = kzalloc(sizeof | |
1292 | (*e->type_names), | |
1293 | GFP_KERNEL); | |
1294 | if (!e->type_names) | |
1295 | return -ENOMEM; | |
1296 | type_set_init(e->type_names); | |
1297 | rc = type_set_read(e->type_names, fp); | |
1298 | if (rc) | |
1299 | return rc; | |
1300 | } | |
1da177e4 LT |
1301 | break; |
1302 | default: | |
1303 | return -EINVAL; | |
1304 | } | |
1305 | le = e; | |
1306 | } | |
1307 | if (depth != 0) | |
1308 | return -EINVAL; | |
1309 | lc = c; | |
1310 | } | |
1311 | ||
1312 | return 0; | |
1313 | } | |
1314 | ||
1315 | static int class_read(struct policydb *p, struct hashtab *h, void *fp) | |
1316 | { | |
1317 | char *key = NULL; | |
1318 | struct class_datum *cladatum; | |
b5bf6c55 AD |
1319 | __le32 buf[6]; |
1320 | u32 len, len2, ncons, nel; | |
1da177e4 LT |
1321 | int i, rc; |
1322 | ||
9398c7f7 | 1323 | rc = -ENOMEM; |
89d155ef | 1324 | cladatum = kzalloc(sizeof(*cladatum), GFP_KERNEL); |
9398c7f7 EP |
1325 | if (!cladatum) |
1326 | goto bad; | |
1da177e4 LT |
1327 | |
1328 | rc = next_entry(buf, fp, sizeof(u32)*6); | |
9398c7f7 | 1329 | if (rc) |
1da177e4 LT |
1330 | goto bad; |
1331 | ||
1332 | len = le32_to_cpu(buf[0]); | |
1333 | len2 = le32_to_cpu(buf[1]); | |
1334 | cladatum->value = le32_to_cpu(buf[2]); | |
1335 | ||
1336 | rc = symtab_init(&cladatum->permissions, PERM_SYMTAB_SIZE); | |
1337 | if (rc) | |
1338 | goto bad; | |
1339 | cladatum->permissions.nprim = le32_to_cpu(buf[3]); | |
1340 | nel = le32_to_cpu(buf[4]); | |
1341 | ||
1342 | ncons = le32_to_cpu(buf[5]); | |
1343 | ||
4b6f405f | 1344 | rc = str_read(&key, GFP_KERNEL, fp, len); |
9398c7f7 | 1345 | if (rc) |
1da177e4 | 1346 | goto bad; |
1da177e4 LT |
1347 | |
1348 | if (len2) { | |
4b6f405f | 1349 | rc = str_read(&cladatum->comkey, GFP_KERNEL, fp, len2); |
9398c7f7 | 1350 | if (rc) |
1da177e4 | 1351 | goto bad; |
1da177e4 | 1352 | |
9398c7f7 EP |
1353 | rc = -EINVAL; |
1354 | cladatum->comdatum = hashtab_search(p->p_commons.table, cladatum->comkey); | |
1da177e4 | 1355 | if (!cladatum->comdatum) { |
9398c7f7 | 1356 | printk(KERN_ERR "SELinux: unknown common %s\n", cladatum->comkey); |
1da177e4 LT |
1357 | goto bad; |
1358 | } | |
1359 | } | |
1360 | for (i = 0; i < nel; i++) { | |
1361 | rc = perm_read(p, cladatum->permissions.table, fp); | |
1362 | if (rc) | |
1363 | goto bad; | |
1364 | } | |
1365 | ||
a660bec1 | 1366 | rc = read_cons_helper(p, &cladatum->constraints, ncons, 0, fp); |
1da177e4 LT |
1367 | if (rc) |
1368 | goto bad; | |
1369 | ||
1370 | if (p->policyvers >= POLICYDB_VERSION_VALIDATETRANS) { | |
1371 | /* grab the validatetrans rules */ | |
1372 | rc = next_entry(buf, fp, sizeof(u32)); | |
9398c7f7 | 1373 | if (rc) |
1da177e4 LT |
1374 | goto bad; |
1375 | ncons = le32_to_cpu(buf[0]); | |
a660bec1 RH |
1376 | rc = read_cons_helper(p, &cladatum->validatetrans, |
1377 | ncons, 1, fp); | |
1da177e4 LT |
1378 | if (rc) |
1379 | goto bad; | |
1380 | } | |
1381 | ||
aa893269 EP |
1382 | if (p->policyvers >= POLICYDB_VERSION_NEW_OBJECT_DEFAULTS) { |
1383 | rc = next_entry(buf, fp, sizeof(u32) * 3); | |
1384 | if (rc) | |
1385 | goto bad; | |
1386 | ||
1387 | cladatum->default_user = le32_to_cpu(buf[0]); | |
1388 | cladatum->default_role = le32_to_cpu(buf[1]); | |
1389 | cladatum->default_range = le32_to_cpu(buf[2]); | |
1390 | } | |
1391 | ||
eed7795d EP |
1392 | if (p->policyvers >= POLICYDB_VERSION_DEFAULT_TYPE) { |
1393 | rc = next_entry(buf, fp, sizeof(u32) * 1); | |
1394 | if (rc) | |
1395 | goto bad; | |
1396 | cladatum->default_type = le32_to_cpu(buf[0]); | |
1397 | } | |
1398 | ||
1da177e4 LT |
1399 | rc = hashtab_insert(h, key, cladatum); |
1400 | if (rc) | |
1401 | goto bad; | |
1402 | ||
9398c7f7 | 1403 | return 0; |
1da177e4 | 1404 | bad: |
6cbda6b6 | 1405 | cls_destroy(key, cladatum, NULL); |
9398c7f7 | 1406 | return rc; |
1da177e4 LT |
1407 | } |
1408 | ||
1409 | static int role_read(struct policydb *p, struct hashtab *h, void *fp) | |
1410 | { | |
1411 | char *key = NULL; | |
1412 | struct role_datum *role; | |
d9250dea KK |
1413 | int rc, to_read = 2; |
1414 | __le32 buf[3]; | |
b5bf6c55 | 1415 | u32 len; |
1da177e4 | 1416 | |
9398c7f7 | 1417 | rc = -ENOMEM; |
89d155ef | 1418 | role = kzalloc(sizeof(*role), GFP_KERNEL); |
9398c7f7 EP |
1419 | if (!role) |
1420 | goto bad; | |
1da177e4 | 1421 | |
d9250dea KK |
1422 | if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) |
1423 | to_read = 3; | |
1424 | ||
1425 | rc = next_entry(buf, fp, sizeof(buf[0]) * to_read); | |
9398c7f7 | 1426 | if (rc) |
1da177e4 LT |
1427 | goto bad; |
1428 | ||
1429 | len = le32_to_cpu(buf[0]); | |
1430 | role->value = le32_to_cpu(buf[1]); | |
d9250dea KK |
1431 | if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) |
1432 | role->bounds = le32_to_cpu(buf[2]); | |
1da177e4 | 1433 | |
4b6f405f | 1434 | rc = str_read(&key, GFP_KERNEL, fp, len); |
9398c7f7 | 1435 | if (rc) |
1da177e4 | 1436 | goto bad; |
1da177e4 LT |
1437 | |
1438 | rc = ebitmap_read(&role->dominates, fp); | |
1439 | if (rc) | |
1440 | goto bad; | |
1441 | ||
1442 | rc = ebitmap_read(&role->types, fp); | |
1443 | if (rc) | |
1444 | goto bad; | |
1445 | ||
1446 | if (strcmp(key, OBJECT_R) == 0) { | |
9398c7f7 | 1447 | rc = -EINVAL; |
1da177e4 | 1448 | if (role->value != OBJECT_R_VAL) { |
744ba35e | 1449 | printk(KERN_ERR "SELinux: Role %s has wrong value %d\n", |
1da177e4 | 1450 | OBJECT_R, role->value); |
1da177e4 LT |
1451 | goto bad; |
1452 | } | |
1453 | rc = 0; | |
1454 | goto bad; | |
1455 | } | |
1456 | ||
1457 | rc = hashtab_insert(h, key, role); | |
1458 | if (rc) | |
1459 | goto bad; | |
9398c7f7 | 1460 | return 0; |
1da177e4 LT |
1461 | bad: |
1462 | role_destroy(key, role, NULL); | |
9398c7f7 | 1463 | return rc; |
1da177e4 LT |
1464 | } |
1465 | ||
1466 | static int type_read(struct policydb *p, struct hashtab *h, void *fp) | |
1467 | { | |
1468 | char *key = NULL; | |
1469 | struct type_datum *typdatum; | |
d9250dea KK |
1470 | int rc, to_read = 3; |
1471 | __le32 buf[4]; | |
b5bf6c55 | 1472 | u32 len; |
1da177e4 | 1473 | |
9398c7f7 | 1474 | rc = -ENOMEM; |
2ced3dfd | 1475 | typdatum = kzalloc(sizeof(*typdatum), GFP_KERNEL); |
9398c7f7 EP |
1476 | if (!typdatum) |
1477 | goto bad; | |
1da177e4 | 1478 | |
d9250dea KK |
1479 | if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) |
1480 | to_read = 4; | |
1481 | ||
1482 | rc = next_entry(buf, fp, sizeof(buf[0]) * to_read); | |
9398c7f7 | 1483 | if (rc) |
1da177e4 LT |
1484 | goto bad; |
1485 | ||
1486 | len = le32_to_cpu(buf[0]); | |
1487 | typdatum->value = le32_to_cpu(buf[1]); | |
d9250dea KK |
1488 | if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) { |
1489 | u32 prop = le32_to_cpu(buf[2]); | |
1490 | ||
1491 | if (prop & TYPEDATUM_PROPERTY_PRIMARY) | |
1492 | typdatum->primary = 1; | |
1493 | if (prop & TYPEDATUM_PROPERTY_ATTRIBUTE) | |
1494 | typdatum->attribute = 1; | |
1495 | ||
1496 | typdatum->bounds = le32_to_cpu(buf[3]); | |
1497 | } else { | |
1498 | typdatum->primary = le32_to_cpu(buf[2]); | |
1499 | } | |
1da177e4 | 1500 | |
4b6f405f | 1501 | rc = str_read(&key, GFP_KERNEL, fp, len); |
9398c7f7 | 1502 | if (rc) |
1da177e4 | 1503 | goto bad; |
1da177e4 LT |
1504 | |
1505 | rc = hashtab_insert(h, key, typdatum); | |
1506 | if (rc) | |
1507 | goto bad; | |
9398c7f7 | 1508 | return 0; |
1da177e4 LT |
1509 | bad: |
1510 | type_destroy(key, typdatum, NULL); | |
9398c7f7 | 1511 | return rc; |
1da177e4 LT |
1512 | } |
1513 | ||
1514 | ||
1515 | /* | |
1516 | * Read a MLS level structure from a policydb binary | |
1517 | * representation file. | |
1518 | */ | |
1519 | static int mls_read_level(struct mls_level *lp, void *fp) | |
1520 | { | |
b5bf6c55 | 1521 | __le32 buf[1]; |
1da177e4 LT |
1522 | int rc; |
1523 | ||
1524 | memset(lp, 0, sizeof(*lp)); | |
1525 | ||
1526 | rc = next_entry(buf, fp, sizeof buf); | |
9398c7f7 | 1527 | if (rc) { |
454d972c | 1528 | printk(KERN_ERR "SELinux: mls: truncated level\n"); |
9398c7f7 | 1529 | return rc; |
1da177e4 LT |
1530 | } |
1531 | lp->sens = le32_to_cpu(buf[0]); | |
1532 | ||
9398c7f7 EP |
1533 | rc = ebitmap_read(&lp->cat, fp); |
1534 | if (rc) { | |
1535 | printk(KERN_ERR "SELinux: mls: error reading level categories\n"); | |
1536 | return rc; | |
1da177e4 LT |
1537 | } |
1538 | return 0; | |
1da177e4 LT |
1539 | } |
1540 | ||
1541 | static int user_read(struct policydb *p, struct hashtab *h, void *fp) | |
1542 | { | |
1543 | char *key = NULL; | |
1544 | struct user_datum *usrdatum; | |
d9250dea KK |
1545 | int rc, to_read = 2; |
1546 | __le32 buf[3]; | |
b5bf6c55 | 1547 | u32 len; |
1da177e4 | 1548 | |
9398c7f7 | 1549 | rc = -ENOMEM; |
89d155ef | 1550 | usrdatum = kzalloc(sizeof(*usrdatum), GFP_KERNEL); |
9398c7f7 EP |
1551 | if (!usrdatum) |
1552 | goto bad; | |
1da177e4 | 1553 | |
d9250dea KK |
1554 | if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) |
1555 | to_read = 3; | |
1556 | ||
1557 | rc = next_entry(buf, fp, sizeof(buf[0]) * to_read); | |
9398c7f7 | 1558 | if (rc) |
1da177e4 LT |
1559 | goto bad; |
1560 | ||
1561 | len = le32_to_cpu(buf[0]); | |
1562 | usrdatum->value = le32_to_cpu(buf[1]); | |
d9250dea KK |
1563 | if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) |
1564 | usrdatum->bounds = le32_to_cpu(buf[2]); | |
1da177e4 | 1565 | |
4b6f405f | 1566 | rc = str_read(&key, GFP_KERNEL, fp, len); |
9398c7f7 | 1567 | if (rc) |
1da177e4 | 1568 | goto bad; |
1da177e4 LT |
1569 | |
1570 | rc = ebitmap_read(&usrdatum->roles, fp); | |
1571 | if (rc) | |
1572 | goto bad; | |
1573 | ||
1574 | if (p->policyvers >= POLICYDB_VERSION_MLS) { | |
1575 | rc = mls_read_range_helper(&usrdatum->range, fp); | |
1576 | if (rc) | |
1577 | goto bad; | |
1578 | rc = mls_read_level(&usrdatum->dfltlevel, fp); | |
1579 | if (rc) | |
1580 | goto bad; | |
1581 | } | |
1582 | ||
1583 | rc = hashtab_insert(h, key, usrdatum); | |
1584 | if (rc) | |
1585 | goto bad; | |
9398c7f7 | 1586 | return 0; |
1da177e4 LT |
1587 | bad: |
1588 | user_destroy(key, usrdatum, NULL); | |
9398c7f7 | 1589 | return rc; |
1da177e4 LT |
1590 | } |
1591 | ||
1592 | static int sens_read(struct policydb *p, struct hashtab *h, void *fp) | |
1593 | { | |
1594 | char *key = NULL; | |
1595 | struct level_datum *levdatum; | |
1596 | int rc; | |
b5bf6c55 AD |
1597 | __le32 buf[2]; |
1598 | u32 len; | |
1da177e4 | 1599 | |
9398c7f7 | 1600 | rc = -ENOMEM; |
89d155ef | 1601 | levdatum = kzalloc(sizeof(*levdatum), GFP_ATOMIC); |
9398c7f7 EP |
1602 | if (!levdatum) |
1603 | goto bad; | |
1da177e4 LT |
1604 | |
1605 | rc = next_entry(buf, fp, sizeof buf); | |
9398c7f7 | 1606 | if (rc) |
1da177e4 LT |
1607 | goto bad; |
1608 | ||
1609 | len = le32_to_cpu(buf[0]); | |
1610 | levdatum->isalias = le32_to_cpu(buf[1]); | |
1611 | ||
4b6f405f | 1612 | rc = str_read(&key, GFP_ATOMIC, fp, len); |
9398c7f7 | 1613 | if (rc) |
1da177e4 | 1614 | goto bad; |
1da177e4 | 1615 | |
9398c7f7 | 1616 | rc = -ENOMEM; |
1da177e4 | 1617 | levdatum->level = kmalloc(sizeof(struct mls_level), GFP_ATOMIC); |
9398c7f7 | 1618 | if (!levdatum->level) |
1da177e4 | 1619 | goto bad; |
9398c7f7 EP |
1620 | |
1621 | rc = mls_read_level(levdatum->level, fp); | |
1622 | if (rc) | |
1da177e4 | 1623 | goto bad; |
1da177e4 LT |
1624 | |
1625 | rc = hashtab_insert(h, key, levdatum); | |
1626 | if (rc) | |
1627 | goto bad; | |
9398c7f7 | 1628 | return 0; |
1da177e4 LT |
1629 | bad: |
1630 | sens_destroy(key, levdatum, NULL); | |
9398c7f7 | 1631 | return rc; |
1da177e4 LT |
1632 | } |
1633 | ||
1634 | static int cat_read(struct policydb *p, struct hashtab *h, void *fp) | |
1635 | { | |
1636 | char *key = NULL; | |
1637 | struct cat_datum *catdatum; | |
1638 | int rc; | |
b5bf6c55 AD |
1639 | __le32 buf[3]; |
1640 | u32 len; | |
1da177e4 | 1641 | |
9398c7f7 | 1642 | rc = -ENOMEM; |
89d155ef | 1643 | catdatum = kzalloc(sizeof(*catdatum), GFP_ATOMIC); |
9398c7f7 EP |
1644 | if (!catdatum) |
1645 | goto bad; | |
1da177e4 LT |
1646 | |
1647 | rc = next_entry(buf, fp, sizeof buf); | |
9398c7f7 | 1648 | if (rc) |
1da177e4 LT |
1649 | goto bad; |
1650 | ||
1651 | len = le32_to_cpu(buf[0]); | |
1652 | catdatum->value = le32_to_cpu(buf[1]); | |
1653 | catdatum->isalias = le32_to_cpu(buf[2]); | |
1654 | ||
4b6f405f | 1655 | rc = str_read(&key, GFP_ATOMIC, fp, len); |
9398c7f7 | 1656 | if (rc) |
1da177e4 | 1657 | goto bad; |
1da177e4 LT |
1658 | |
1659 | rc = hashtab_insert(h, key, catdatum); | |
1660 | if (rc) | |
1661 | goto bad; | |
9398c7f7 | 1662 | return 0; |
1da177e4 LT |
1663 | bad: |
1664 | cat_destroy(key, catdatum, NULL); | |
9398c7f7 | 1665 | return rc; |
1da177e4 LT |
1666 | } |
1667 | ||
1668 | static int (*read_f[SYM_NUM]) (struct policydb *p, struct hashtab *h, void *fp) = | |
1669 | { | |
1670 | common_read, | |
1671 | class_read, | |
1672 | role_read, | |
1673 | type_read, | |
1674 | user_read, | |
1675 | cond_read_bool, | |
1676 | sens_read, | |
1677 | cat_read, | |
1678 | }; | |
1679 | ||
d9250dea KK |
1680 | static int user_bounds_sanity_check(void *key, void *datum, void *datap) |
1681 | { | |
1682 | struct user_datum *upper, *user; | |
1683 | struct policydb *p = datap; | |
1684 | int depth = 0; | |
1685 | ||
1686 | upper = user = datum; | |
1687 | while (upper->bounds) { | |
1688 | struct ebitmap_node *node; | |
1689 | unsigned long bit; | |
1690 | ||
1691 | if (++depth == POLICYDB_BOUNDS_MAXDEPTH) { | |
1692 | printk(KERN_ERR "SELinux: user %s: " | |
1693 | "too deep or looped boundary", | |
1694 | (char *) key); | |
1695 | return -EINVAL; | |
1696 | } | |
1697 | ||
1698 | upper = p->user_val_to_struct[upper->bounds - 1]; | |
1699 | ebitmap_for_each_positive_bit(&user->roles, node, bit) { | |
1700 | if (ebitmap_get_bit(&upper->roles, bit)) | |
1701 | continue; | |
1702 | ||
1703 | printk(KERN_ERR | |
1704 | "SELinux: boundary violated policy: " | |
1705 | "user=%s role=%s bounds=%s\n", | |
ac76c05b EP |
1706 | sym_name(p, SYM_USERS, user->value - 1), |
1707 | sym_name(p, SYM_ROLES, bit), | |
1708 | sym_name(p, SYM_USERS, upper->value - 1)); | |
d9250dea KK |
1709 | |
1710 | return -EINVAL; | |
1711 | } | |
1712 | } | |
1713 | ||
1714 | return 0; | |
1715 | } | |
1716 | ||
1717 | static int role_bounds_sanity_check(void *key, void *datum, void *datap) | |
1718 | { | |
1719 | struct role_datum *upper, *role; | |
1720 | struct policydb *p = datap; | |
1721 | int depth = 0; | |
1722 | ||
1723 | upper = role = datum; | |
1724 | while (upper->bounds) { | |
1725 | struct ebitmap_node *node; | |
1726 | unsigned long bit; | |
1727 | ||
1728 | if (++depth == POLICYDB_BOUNDS_MAXDEPTH) { | |
1729 | printk(KERN_ERR "SELinux: role %s: " | |
1730 | "too deep or looped bounds\n", | |
1731 | (char *) key); | |
1732 | return -EINVAL; | |
1733 | } | |
1734 | ||
1735 | upper = p->role_val_to_struct[upper->bounds - 1]; | |
1736 | ebitmap_for_each_positive_bit(&role->types, node, bit) { | |
1737 | if (ebitmap_get_bit(&upper->types, bit)) | |
1738 | continue; | |
1739 | ||
1740 | printk(KERN_ERR | |
1741 | "SELinux: boundary violated policy: " | |
1742 | "role=%s type=%s bounds=%s\n", | |
ac76c05b EP |
1743 | sym_name(p, SYM_ROLES, role->value - 1), |
1744 | sym_name(p, SYM_TYPES, bit), | |
1745 | sym_name(p, SYM_ROLES, upper->value - 1)); | |
d9250dea KK |
1746 | |
1747 | return -EINVAL; | |
1748 | } | |
1749 | } | |
1750 | ||
1751 | return 0; | |
1752 | } | |
1753 | ||
1754 | static int type_bounds_sanity_check(void *key, void *datum, void *datap) | |
1755 | { | |
daa6d83a | 1756 | struct type_datum *upper; |
d9250dea KK |
1757 | struct policydb *p = datap; |
1758 | int depth = 0; | |
1759 | ||
daa6d83a | 1760 | upper = datum; |
d9250dea KK |
1761 | while (upper->bounds) { |
1762 | if (++depth == POLICYDB_BOUNDS_MAXDEPTH) { | |
1763 | printk(KERN_ERR "SELinux: type %s: " | |
1764 | "too deep or looped boundary\n", | |
1765 | (char *) key); | |
1766 | return -EINVAL; | |
1767 | } | |
1768 | ||
23bdecb0 EP |
1769 | upper = flex_array_get_ptr(p->type_val_to_struct_array, |
1770 | upper->bounds - 1); | |
1771 | BUG_ON(!upper); | |
1772 | ||
d9250dea KK |
1773 | if (upper->attribute) { |
1774 | printk(KERN_ERR "SELinux: type %s: " | |
1775 | "bounded by attribute %s", | |
1776 | (char *) key, | |
ac76c05b | 1777 | sym_name(p, SYM_TYPES, upper->value - 1)); |
d9250dea KK |
1778 | return -EINVAL; |
1779 | } | |
1780 | } | |
1781 | ||
1782 | return 0; | |
1783 | } | |
1784 | ||
1785 | static int policydb_bounds_sanity_check(struct policydb *p) | |
1786 | { | |
1787 | int rc; | |
1788 | ||
1789 | if (p->policyvers < POLICYDB_VERSION_BOUNDARY) | |
1790 | return 0; | |
1791 | ||
1792 | rc = hashtab_map(p->p_users.table, | |
1793 | user_bounds_sanity_check, p); | |
1794 | if (rc) | |
1795 | return rc; | |
1796 | ||
1797 | rc = hashtab_map(p->p_roles.table, | |
1798 | role_bounds_sanity_check, p); | |
1799 | if (rc) | |
1800 | return rc; | |
1801 | ||
1802 | rc = hashtab_map(p->p_types.table, | |
1803 | type_bounds_sanity_check, p); | |
1804 | if (rc) | |
1805 | return rc; | |
1806 | ||
1807 | return 0; | |
1808 | } | |
1809 | ||
c6d3aaa4 SS |
1810 | u16 string_to_security_class(struct policydb *p, const char *name) |
1811 | { | |
1812 | struct class_datum *cladatum; | |
1813 | ||
1814 | cladatum = hashtab_search(p->p_classes.table, name); | |
1815 | if (!cladatum) | |
1816 | return 0; | |
1817 | ||
1818 | return cladatum->value; | |
1819 | } | |
1820 | ||
1821 | u32 string_to_av_perm(struct policydb *p, u16 tclass, const char *name) | |
1822 | { | |
1823 | struct class_datum *cladatum; | |
1824 | struct perm_datum *perdatum = NULL; | |
1825 | struct common_datum *comdatum; | |
1826 | ||
1827 | if (!tclass || tclass > p->p_classes.nprim) | |
1828 | return 0; | |
1829 | ||
1830 | cladatum = p->class_val_to_struct[tclass-1]; | |
1831 | comdatum = cladatum->comdatum; | |
1832 | if (comdatum) | |
1833 | perdatum = hashtab_search(comdatum->permissions.table, | |
1834 | name); | |
1835 | if (!perdatum) | |
1836 | perdatum = hashtab_search(cladatum->permissions.table, | |
1837 | name); | |
1838 | if (!perdatum) | |
1839 | return 0; | |
1840 | ||
1841 | return 1U << (perdatum->value-1); | |
1842 | } | |
1843 | ||
9ee0c823 EP |
1844 | static int range_read(struct policydb *p, void *fp) |
1845 | { | |
1846 | struct range_trans *rt = NULL; | |
1847 | struct mls_range *r = NULL; | |
1848 | int i, rc; | |
1849 | __le32 buf[2]; | |
1850 | u32 nel; | |
1851 | ||
1852 | if (p->policyvers < POLICYDB_VERSION_MLS) | |
1853 | return 0; | |
1854 | ||
1855 | rc = next_entry(buf, fp, sizeof(u32)); | |
1856 | if (rc) | |
1857 | goto out; | |
1858 | ||
1859 | nel = le32_to_cpu(buf[0]); | |
1860 | for (i = 0; i < nel; i++) { | |
1861 | rc = -ENOMEM; | |
1862 | rt = kzalloc(sizeof(*rt), GFP_KERNEL); | |
1863 | if (!rt) | |
1864 | goto out; | |
1865 | ||
1866 | rc = next_entry(buf, fp, (sizeof(u32) * 2)); | |
1867 | if (rc) | |
1868 | goto out; | |
1869 | ||
1870 | rt->source_type = le32_to_cpu(buf[0]); | |
1871 | rt->target_type = le32_to_cpu(buf[1]); | |
1872 | if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) { | |
1873 | rc = next_entry(buf, fp, sizeof(u32)); | |
1874 | if (rc) | |
1875 | goto out; | |
1876 | rt->target_class = le32_to_cpu(buf[0]); | |
1877 | } else | |
1878 | rt->target_class = p->process_class; | |
1879 | ||
1880 | rc = -EINVAL; | |
1881 | if (!policydb_type_isvalid(p, rt->source_type) || | |
1882 | !policydb_type_isvalid(p, rt->target_type) || | |
1883 | !policydb_class_isvalid(p, rt->target_class)) | |
1884 | goto out; | |
1885 | ||
1886 | rc = -ENOMEM; | |
1887 | r = kzalloc(sizeof(*r), GFP_KERNEL); | |
1888 | if (!r) | |
1889 | goto out; | |
1890 | ||
1891 | rc = mls_read_range_helper(r, fp); | |
1892 | if (rc) | |
1893 | goto out; | |
1894 | ||
1895 | rc = -EINVAL; | |
1896 | if (!mls_range_isvalid(p, r)) { | |
1897 | printk(KERN_WARNING "SELinux: rangetrans: invalid range\n"); | |
1898 | goto out; | |
1899 | } | |
1900 | ||
1901 | rc = hashtab_insert(p->range_tr, rt, r); | |
1902 | if (rc) | |
1903 | goto out; | |
1904 | ||
1905 | rt = NULL; | |
1906 | r = NULL; | |
1907 | } | |
be30b16d | 1908 | hash_eval(p->range_tr, "rangetr"); |
9ee0c823 EP |
1909 | rc = 0; |
1910 | out: | |
1911 | kfree(rt); | |
1912 | kfree(r); | |
1913 | return rc; | |
1914 | } | |
1915 | ||
652bb9b0 EP |
1916 | static int filename_trans_read(struct policydb *p, void *fp) |
1917 | { | |
2463c26d EP |
1918 | struct filename_trans *ft; |
1919 | struct filename_trans_datum *otype; | |
652bb9b0 | 1920 | char *name; |
2463c26d | 1921 | u32 nel, len; |
652bb9b0 EP |
1922 | __le32 buf[4]; |
1923 | int rc, i; | |
1924 | ||
1925 | if (p->policyvers < POLICYDB_VERSION_FILENAME_TRANS) | |
1926 | return 0; | |
1927 | ||
1928 | rc = next_entry(buf, fp, sizeof(u32)); | |
1929 | if (rc) | |
2463c26d | 1930 | return rc; |
652bb9b0 EP |
1931 | nel = le32_to_cpu(buf[0]); |
1932 | ||
652bb9b0 | 1933 | for (i = 0; i < nel; i++) { |
2463c26d EP |
1934 | ft = NULL; |
1935 | otype = NULL; | |
1936 | name = NULL; | |
1937 | ||
652bb9b0 EP |
1938 | rc = -ENOMEM; |
1939 | ft = kzalloc(sizeof(*ft), GFP_KERNEL); | |
1940 | if (!ft) | |
1941 | goto out; | |
1942 | ||
2463c26d EP |
1943 | rc = -ENOMEM; |
1944 | otype = kmalloc(sizeof(*otype), GFP_KERNEL); | |
1945 | if (!otype) | |
1946 | goto out; | |
652bb9b0 EP |
1947 | |
1948 | /* length of the path component string */ | |
1949 | rc = next_entry(buf, fp, sizeof(u32)); | |
1950 | if (rc) | |
1951 | goto out; | |
1952 | len = le32_to_cpu(buf[0]); | |
1953 | ||
652bb9b0 | 1954 | /* path component string */ |
4b6f405f | 1955 | rc = str_read(&name, GFP_KERNEL, fp, len); |
652bb9b0 EP |
1956 | if (rc) |
1957 | goto out; | |
4b6f405f NK |
1958 | |
1959 | ft->name = name; | |
652bb9b0 | 1960 | |
652bb9b0 EP |
1961 | rc = next_entry(buf, fp, sizeof(u32) * 4); |
1962 | if (rc) | |
1963 | goto out; | |
1964 | ||
1965 | ft->stype = le32_to_cpu(buf[0]); | |
1966 | ft->ttype = le32_to_cpu(buf[1]); | |
1967 | ft->tclass = le32_to_cpu(buf[2]); | |
2463c26d EP |
1968 | |
1969 | otype->otype = le32_to_cpu(buf[3]); | |
03a4c018 EP |
1970 | |
1971 | rc = ebitmap_set_bit(&p->filename_trans_ttypes, ft->ttype, 1); | |
1972 | if (rc) | |
1973 | goto out; | |
2463c26d | 1974 | |
8ed81460 TH |
1975 | rc = hashtab_insert(p->filename_trans, ft, otype); |
1976 | if (rc) { | |
1977 | /* | |
1978 | * Do not return -EEXIST to the caller, or the system | |
1979 | * will not boot. | |
1980 | */ | |
1981 | if (rc != -EEXIST) | |
1982 | goto out; | |
1983 | /* But free memory to avoid memory leak. */ | |
1984 | kfree(ft); | |
1985 | kfree(name); | |
1986 | kfree(otype); | |
1987 | } | |
652bb9b0 | 1988 | } |
2463c26d EP |
1989 | hash_eval(p->filename_trans, "filenametr"); |
1990 | return 0; | |
652bb9b0 | 1991 | out: |
2463c26d EP |
1992 | kfree(ft); |
1993 | kfree(name); | |
1994 | kfree(otype); | |
1995 | ||
652bb9b0 EP |
1996 | return rc; |
1997 | } | |
1998 | ||
d1b43547 EP |
1999 | static int genfs_read(struct policydb *p, void *fp) |
2000 | { | |
2001 | int i, j, rc; | |
2002 | u32 nel, nel2, len, len2; | |
2003 | __le32 buf[1]; | |
2004 | struct ocontext *l, *c; | |
2005 | struct ocontext *newc = NULL; | |
2006 | struct genfs *genfs_p, *genfs; | |
2007 | struct genfs *newgenfs = NULL; | |
2008 | ||
2009 | rc = next_entry(buf, fp, sizeof(u32)); | |
2010 | if (rc) | |
2011 | goto out; | |
2012 | nel = le32_to_cpu(buf[0]); | |
2013 | ||
2014 | for (i = 0; i < nel; i++) { | |
2015 | rc = next_entry(buf, fp, sizeof(u32)); | |
2016 | if (rc) | |
2017 | goto out; | |
2018 | len = le32_to_cpu(buf[0]); | |
2019 | ||
2020 | rc = -ENOMEM; | |
2021 | newgenfs = kzalloc(sizeof(*newgenfs), GFP_KERNEL); | |
2022 | if (!newgenfs) | |
2023 | goto out; | |
2024 | ||
4b6f405f | 2025 | rc = str_read(&newgenfs->fstype, GFP_KERNEL, fp, len); |
d1b43547 EP |
2026 | if (rc) |
2027 | goto out; | |
2028 | ||
d1b43547 EP |
2029 | for (genfs_p = NULL, genfs = p->genfs; genfs; |
2030 | genfs_p = genfs, genfs = genfs->next) { | |
2031 | rc = -EINVAL; | |
2032 | if (strcmp(newgenfs->fstype, genfs->fstype) == 0) { | |
2033 | printk(KERN_ERR "SELinux: dup genfs fstype %s\n", | |
2034 | newgenfs->fstype); | |
2035 | goto out; | |
2036 | } | |
2037 | if (strcmp(newgenfs->fstype, genfs->fstype) < 0) | |
2038 | break; | |
2039 | } | |
2040 | newgenfs->next = genfs; | |
2041 | if (genfs_p) | |
2042 | genfs_p->next = newgenfs; | |
2043 | else | |
2044 | p->genfs = newgenfs; | |
2045 | genfs = newgenfs; | |
2046 | newgenfs = NULL; | |
2047 | ||
2048 | rc = next_entry(buf, fp, sizeof(u32)); | |
2049 | if (rc) | |
2050 | goto out; | |
2051 | ||
2052 | nel2 = le32_to_cpu(buf[0]); | |
2053 | for (j = 0; j < nel2; j++) { | |
2054 | rc = next_entry(buf, fp, sizeof(u32)); | |
2055 | if (rc) | |
2056 | goto out; | |
2057 | len = le32_to_cpu(buf[0]); | |
2058 | ||
2059 | rc = -ENOMEM; | |
2060 | newc = kzalloc(sizeof(*newc), GFP_KERNEL); | |
2061 | if (!newc) | |
2062 | goto out; | |
2063 | ||
4b6f405f | 2064 | rc = str_read(&newc->u.name, GFP_KERNEL, fp, len); |
d1b43547 EP |
2065 | if (rc) |
2066 | goto out; | |
d1b43547 EP |
2067 | |
2068 | rc = next_entry(buf, fp, sizeof(u32)); | |
2069 | if (rc) | |
2070 | goto out; | |
2071 | ||
2072 | newc->v.sclass = le32_to_cpu(buf[0]); | |
2073 | rc = context_read_and_validate(&newc->context[0], p, fp); | |
2074 | if (rc) | |
2075 | goto out; | |
2076 | ||
2077 | for (l = NULL, c = genfs->head; c; | |
2078 | l = c, c = c->next) { | |
2079 | rc = -EINVAL; | |
2080 | if (!strcmp(newc->u.name, c->u.name) && | |
2081 | (!c->v.sclass || !newc->v.sclass || | |
2082 | newc->v.sclass == c->v.sclass)) { | |
2083 | printk(KERN_ERR "SELinux: dup genfs entry (%s,%s)\n", | |
2084 | genfs->fstype, c->u.name); | |
2085 | goto out; | |
2086 | } | |
2087 | len = strlen(newc->u.name); | |
2088 | len2 = strlen(c->u.name); | |
2089 | if (len > len2) | |
2090 | break; | |
2091 | } | |
2092 | ||
2093 | newc->next = c; | |
2094 | if (l) | |
2095 | l->next = newc; | |
2096 | else | |
2097 | genfs->head = newc; | |
2098 | newc = NULL; | |
2099 | } | |
2100 | } | |
2101 | rc = 0; | |
2102 | out: | |
2103 | if (newgenfs) | |
2104 | kfree(newgenfs->fstype); | |
2105 | kfree(newgenfs); | |
2106 | ocontext_destroy(newc, OCON_FSUSE); | |
2107 | ||
2108 | return rc; | |
2109 | } | |
2110 | ||
692a8a23 EP |
2111 | static int ocontext_read(struct policydb *p, struct policydb_compat_info *info, |
2112 | void *fp) | |
2113 | { | |
2114 | int i, j, rc; | |
2115 | u32 nel, len; | |
2116 | __le32 buf[3]; | |
2117 | struct ocontext *l, *c; | |
2118 | u32 nodebuf[8]; | |
2119 | ||
2120 | for (i = 0; i < info->ocon_num; i++) { | |
2121 | rc = next_entry(buf, fp, sizeof(u32)); | |
2122 | if (rc) | |
2123 | goto out; | |
2124 | nel = le32_to_cpu(buf[0]); | |
2125 | ||
2126 | l = NULL; | |
2127 | for (j = 0; j < nel; j++) { | |
2128 | rc = -ENOMEM; | |
2129 | c = kzalloc(sizeof(*c), GFP_KERNEL); | |
2130 | if (!c) | |
2131 | goto out; | |
2132 | if (l) | |
2133 | l->next = c; | |
2134 | else | |
2135 | p->ocontexts[i] = c; | |
2136 | l = c; | |
2137 | ||
2138 | switch (i) { | |
2139 | case OCON_ISID: | |
2140 | rc = next_entry(buf, fp, sizeof(u32)); | |
2141 | if (rc) | |
2142 | goto out; | |
2143 | ||
2144 | c->sid[0] = le32_to_cpu(buf[0]); | |
2145 | rc = context_read_and_validate(&c->context[0], p, fp); | |
2146 | if (rc) | |
2147 | goto out; | |
2148 | break; | |
2149 | case OCON_FS: | |
2150 | case OCON_NETIF: | |
2151 | rc = next_entry(buf, fp, sizeof(u32)); | |
2152 | if (rc) | |
2153 | goto out; | |
2154 | len = le32_to_cpu(buf[0]); | |
2155 | ||
4b6f405f | 2156 | rc = str_read(&c->u.name, GFP_KERNEL, fp, len); |
692a8a23 EP |
2157 | if (rc) |
2158 | goto out; | |
2159 | ||
692a8a23 EP |
2160 | rc = context_read_and_validate(&c->context[0], p, fp); |
2161 | if (rc) | |
2162 | goto out; | |
2163 | rc = context_read_and_validate(&c->context[1], p, fp); | |
2164 | if (rc) | |
2165 | goto out; | |
2166 | break; | |
2167 | case OCON_PORT: | |
2168 | rc = next_entry(buf, fp, sizeof(u32)*3); | |
2169 | if (rc) | |
2170 | goto out; | |
2171 | c->u.port.protocol = le32_to_cpu(buf[0]); | |
2172 | c->u.port.low_port = le32_to_cpu(buf[1]); | |
2173 | c->u.port.high_port = le32_to_cpu(buf[2]); | |
2174 | rc = context_read_and_validate(&c->context[0], p, fp); | |
2175 | if (rc) | |
2176 | goto out; | |
2177 | break; | |
2178 | case OCON_NODE: | |
2179 | rc = next_entry(nodebuf, fp, sizeof(u32) * 2); | |
2180 | if (rc) | |
2181 | goto out; | |
2182 | c->u.node.addr = nodebuf[0]; /* network order */ | |
2183 | c->u.node.mask = nodebuf[1]; /* network order */ | |
2184 | rc = context_read_and_validate(&c->context[0], p, fp); | |
2185 | if (rc) | |
2186 | goto out; | |
2187 | break; | |
2188 | case OCON_FSUSE: | |
2189 | rc = next_entry(buf, fp, sizeof(u32)*2); | |
2190 | if (rc) | |
2191 | goto out; | |
2192 | ||
2193 | rc = -EINVAL; | |
2194 | c->v.behavior = le32_to_cpu(buf[0]); | |
eb9ae686 DQ |
2195 | /* Determined at runtime, not in policy DB. */ |
2196 | if (c->v.behavior == SECURITY_FS_USE_MNTPOINT) | |
2197 | goto out; | |
2198 | if (c->v.behavior > SECURITY_FS_USE_MAX) | |
692a8a23 EP |
2199 | goto out; |
2200 | ||
692a8a23 | 2201 | len = le32_to_cpu(buf[1]); |
4b6f405f | 2202 | rc = str_read(&c->u.name, GFP_KERNEL, fp, len); |
692a8a23 EP |
2203 | if (rc) |
2204 | goto out; | |
4b6f405f | 2205 | |
692a8a23 EP |
2206 | rc = context_read_and_validate(&c->context[0], p, fp); |
2207 | if (rc) | |
2208 | goto out; | |
2209 | break; | |
2210 | case OCON_NODE6: { | |
2211 | int k; | |
2212 | ||
2213 | rc = next_entry(nodebuf, fp, sizeof(u32) * 8); | |
2214 | if (rc) | |
2215 | goto out; | |
2216 | for (k = 0; k < 4; k++) | |
2217 | c->u.node6.addr[k] = nodebuf[k]; | |
2218 | for (k = 0; k < 4; k++) | |
2219 | c->u.node6.mask[k] = nodebuf[k+4]; | |
2220 | rc = context_read_and_validate(&c->context[0], p, fp); | |
2221 | if (rc) | |
2222 | goto out; | |
2223 | break; | |
2224 | } | |
2225 | } | |
2226 | } | |
2227 | } | |
2228 | rc = 0; | |
2229 | out: | |
2230 | return rc; | |
2231 | } | |
2232 | ||
1da177e4 LT |
2233 | /* |
2234 | * Read the configuration data from a policy database binary | |
2235 | * representation file into a policy database structure. | |
2236 | */ | |
2237 | int policydb_read(struct policydb *p, void *fp) | |
2238 | { | |
2239 | struct role_allow *ra, *lra; | |
2240 | struct role_trans *tr, *ltr; | |
1da177e4 | 2241 | int i, j, rc; |
59dbd1ba | 2242 | __le32 buf[4]; |
d1b43547 EP |
2243 | u32 len, nprim, nel; |
2244 | ||
1da177e4 LT |
2245 | char *policydb_str; |
2246 | struct policydb_compat_info *info; | |
1da177e4 | 2247 | |
1da177e4 LT |
2248 | rc = policydb_init(p); |
2249 | if (rc) | |
9398c7f7 | 2250 | return rc; |
1da177e4 LT |
2251 | |
2252 | /* Read the magic number and string length. */ | |
2ced3dfd | 2253 | rc = next_entry(buf, fp, sizeof(u32) * 2); |
9398c7f7 | 2254 | if (rc) |
1da177e4 LT |
2255 | goto bad; |
2256 | ||
9398c7f7 | 2257 | rc = -EINVAL; |
b5bf6c55 | 2258 | if (le32_to_cpu(buf[0]) != POLICYDB_MAGIC) { |
454d972c | 2259 | printk(KERN_ERR "SELinux: policydb magic number 0x%x does " |
1da177e4 | 2260 | "not match expected magic number 0x%x\n", |
b5bf6c55 | 2261 | le32_to_cpu(buf[0]), POLICYDB_MAGIC); |
1da177e4 LT |
2262 | goto bad; |
2263 | } | |
2264 | ||
9398c7f7 | 2265 | rc = -EINVAL; |
b5bf6c55 | 2266 | len = le32_to_cpu(buf[1]); |
1da177e4 | 2267 | if (len != strlen(POLICYDB_STRING)) { |
454d972c | 2268 | printk(KERN_ERR "SELinux: policydb string length %d does not " |
5b5e0928 | 2269 | "match expected length %zu\n", |
1da177e4 LT |
2270 | len, strlen(POLICYDB_STRING)); |
2271 | goto bad; | |
2272 | } | |
9398c7f7 EP |
2273 | |
2274 | rc = -ENOMEM; | |
2ced3dfd | 2275 | policydb_str = kmalloc(len + 1, GFP_KERNEL); |
1da177e4 | 2276 | if (!policydb_str) { |
454d972c | 2277 | printk(KERN_ERR "SELinux: unable to allocate memory for policydb " |
1da177e4 | 2278 | "string of length %d\n", len); |
1da177e4 LT |
2279 | goto bad; |
2280 | } | |
9398c7f7 | 2281 | |
1da177e4 | 2282 | rc = next_entry(policydb_str, fp, len); |
9398c7f7 | 2283 | if (rc) { |
454d972c | 2284 | printk(KERN_ERR "SELinux: truncated policydb string identifier\n"); |
1da177e4 LT |
2285 | kfree(policydb_str); |
2286 | goto bad; | |
2287 | } | |
9398c7f7 EP |
2288 | |
2289 | rc = -EINVAL; | |
df4ea865 | 2290 | policydb_str[len] = '\0'; |
1da177e4 | 2291 | if (strcmp(policydb_str, POLICYDB_STRING)) { |
454d972c | 2292 | printk(KERN_ERR "SELinux: policydb string %s does not match " |
1da177e4 LT |
2293 | "my string %s\n", policydb_str, POLICYDB_STRING); |
2294 | kfree(policydb_str); | |
2295 | goto bad; | |
2296 | } | |
2297 | /* Done with policydb_str. */ | |
2298 | kfree(policydb_str); | |
2299 | policydb_str = NULL; | |
2300 | ||
0719aaf5 | 2301 | /* Read the version and table sizes. */ |
1da177e4 | 2302 | rc = next_entry(buf, fp, sizeof(u32)*4); |
9398c7f7 | 2303 | if (rc) |
1da177e4 | 2304 | goto bad; |
1da177e4 | 2305 | |
9398c7f7 | 2306 | rc = -EINVAL; |
b5bf6c55 | 2307 | p->policyvers = le32_to_cpu(buf[0]); |
1da177e4 LT |
2308 | if (p->policyvers < POLICYDB_VERSION_MIN || |
2309 | p->policyvers > POLICYDB_VERSION_MAX) { | |
454d972c | 2310 | printk(KERN_ERR "SELinux: policydb version %d does not match " |
2ced3dfd EP |
2311 | "my version range %d-%d\n", |
2312 | le32_to_cpu(buf[0]), POLICYDB_VERSION_MIN, POLICYDB_VERSION_MAX); | |
2313 | goto bad; | |
1da177e4 LT |
2314 | } |
2315 | ||
b5bf6c55 | 2316 | if ((le32_to_cpu(buf[1]) & POLICYDB_CONFIG_MLS)) { |
0719aaf5 | 2317 | p->mls_enabled = 1; |
1da177e4 | 2318 | |
9398c7f7 | 2319 | rc = -EINVAL; |
1da177e4 | 2320 | if (p->policyvers < POLICYDB_VERSION_MLS) { |
744ba35e EP |
2321 | printk(KERN_ERR "SELinux: security policydb version %d " |
2322 | "(MLS) not backwards compatible\n", | |
2323 | p->policyvers); | |
1da177e4 LT |
2324 | goto bad; |
2325 | } | |
1da177e4 | 2326 | } |
3f12070e EP |
2327 | p->reject_unknown = !!(le32_to_cpu(buf[1]) & REJECT_UNKNOWN); |
2328 | p->allow_unknown = !!(le32_to_cpu(buf[1]) & ALLOW_UNKNOWN); | |
1da177e4 | 2329 | |
9398c7f7 EP |
2330 | if (p->policyvers >= POLICYDB_VERSION_POLCAP) { |
2331 | rc = ebitmap_read(&p->policycaps, fp); | |
2332 | if (rc) | |
2333 | goto bad; | |
2334 | } | |
3bb56b25 | 2335 | |
9398c7f7 EP |
2336 | if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE) { |
2337 | rc = ebitmap_read(&p->permissive_map, fp); | |
2338 | if (rc) | |
2339 | goto bad; | |
2340 | } | |
64dbf074 | 2341 | |
9398c7f7 | 2342 | rc = -EINVAL; |
1da177e4 LT |
2343 | info = policydb_lookup_compat(p->policyvers); |
2344 | if (!info) { | |
454d972c | 2345 | printk(KERN_ERR "SELinux: unable to find policy compat info " |
1da177e4 LT |
2346 | "for version %d\n", p->policyvers); |
2347 | goto bad; | |
2348 | } | |
2349 | ||
9398c7f7 | 2350 | rc = -EINVAL; |
b5bf6c55 AD |
2351 | if (le32_to_cpu(buf[2]) != info->sym_num || |
2352 | le32_to_cpu(buf[3]) != info->ocon_num) { | |
454d972c | 2353 | printk(KERN_ERR "SELinux: policydb table sizes (%d,%d) do " |
b5bf6c55 AD |
2354 | "not match mine (%d,%d)\n", le32_to_cpu(buf[2]), |
2355 | le32_to_cpu(buf[3]), | |
1da177e4 LT |
2356 | info->sym_num, info->ocon_num); |
2357 | goto bad; | |
2358 | } | |
2359 | ||
2360 | for (i = 0; i < info->sym_num; i++) { | |
2361 | rc = next_entry(buf, fp, sizeof(u32)*2); | |
9398c7f7 | 2362 | if (rc) |
1da177e4 LT |
2363 | goto bad; |
2364 | nprim = le32_to_cpu(buf[0]); | |
2365 | nel = le32_to_cpu(buf[1]); | |
2366 | for (j = 0; j < nel; j++) { | |
2367 | rc = read_f[i](p, p->symtab[i].table, fp); | |
2368 | if (rc) | |
2369 | goto bad; | |
2370 | } | |
2371 | ||
2372 | p->symtab[i].nprim = nprim; | |
2373 | } | |
2374 | ||
1214eac7 HC |
2375 | rc = -EINVAL; |
2376 | p->process_class = string_to_security_class(p, "process"); | |
2377 | if (!p->process_class) | |
2378 | goto bad; | |
2379 | ||
45e5421e | 2380 | rc = avtab_read(&p->te_avtab, fp, p); |
1da177e4 LT |
2381 | if (rc) |
2382 | goto bad; | |
2383 | ||
2384 | if (p->policyvers >= POLICYDB_VERSION_BOOL) { | |
2385 | rc = cond_read_list(p, fp); | |
2386 | if (rc) | |
2387 | goto bad; | |
2388 | } | |
2389 | ||
2390 | rc = next_entry(buf, fp, sizeof(u32)); | |
9398c7f7 | 2391 | if (rc) |
1da177e4 LT |
2392 | goto bad; |
2393 | nel = le32_to_cpu(buf[0]); | |
2394 | ltr = NULL; | |
2395 | for (i = 0; i < nel; i++) { | |
9398c7f7 | 2396 | rc = -ENOMEM; |
89d155ef | 2397 | tr = kzalloc(sizeof(*tr), GFP_KERNEL); |
9398c7f7 | 2398 | if (!tr) |
1da177e4 | 2399 | goto bad; |
2ced3dfd | 2400 | if (ltr) |
1da177e4 | 2401 | ltr->next = tr; |
2ced3dfd | 2402 | else |
1da177e4 | 2403 | p->role_tr = tr; |
1da177e4 | 2404 | rc = next_entry(buf, fp, sizeof(u32)*3); |
9398c7f7 | 2405 | if (rc) |
1da177e4 | 2406 | goto bad; |
9398c7f7 EP |
2407 | |
2408 | rc = -EINVAL; | |
1da177e4 LT |
2409 | tr->role = le32_to_cpu(buf[0]); |
2410 | tr->type = le32_to_cpu(buf[1]); | |
2411 | tr->new_role = le32_to_cpu(buf[2]); | |
8023976c HC |
2412 | if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) { |
2413 | rc = next_entry(buf, fp, sizeof(u32)); | |
2414 | if (rc) | |
2415 | goto bad; | |
2416 | tr->tclass = le32_to_cpu(buf[0]); | |
2417 | } else | |
2418 | tr->tclass = p->process_class; | |
2419 | ||
9b6a9ecc | 2420 | rc = -EINVAL; |
45e5421e SS |
2421 | if (!policydb_role_isvalid(p, tr->role) || |
2422 | !policydb_type_isvalid(p, tr->type) || | |
8023976c | 2423 | !policydb_class_isvalid(p, tr->tclass) || |
9398c7f7 | 2424 | !policydb_role_isvalid(p, tr->new_role)) |
45e5421e | 2425 | goto bad; |
1da177e4 LT |
2426 | ltr = tr; |
2427 | } | |
2428 | ||
2429 | rc = next_entry(buf, fp, sizeof(u32)); | |
9398c7f7 | 2430 | if (rc) |
1da177e4 LT |
2431 | goto bad; |
2432 | nel = le32_to_cpu(buf[0]); | |
2433 | lra = NULL; | |
2434 | for (i = 0; i < nel; i++) { | |
9398c7f7 | 2435 | rc = -ENOMEM; |
89d155ef | 2436 | ra = kzalloc(sizeof(*ra), GFP_KERNEL); |
9398c7f7 | 2437 | if (!ra) |
1da177e4 | 2438 | goto bad; |
2ced3dfd | 2439 | if (lra) |
1da177e4 | 2440 | lra->next = ra; |
2ced3dfd | 2441 | else |
1da177e4 | 2442 | p->role_allow = ra; |
1da177e4 | 2443 | rc = next_entry(buf, fp, sizeof(u32)*2); |
9398c7f7 | 2444 | if (rc) |
1da177e4 | 2445 | goto bad; |
9398c7f7 EP |
2446 | |
2447 | rc = -EINVAL; | |
1da177e4 LT |
2448 | ra->role = le32_to_cpu(buf[0]); |
2449 | ra->new_role = le32_to_cpu(buf[1]); | |
45e5421e | 2450 | if (!policydb_role_isvalid(p, ra->role) || |
9398c7f7 | 2451 | !policydb_role_isvalid(p, ra->new_role)) |
45e5421e | 2452 | goto bad; |
1da177e4 LT |
2453 | lra = ra; |
2454 | } | |
2455 | ||
652bb9b0 EP |
2456 | rc = filename_trans_read(p, fp); |
2457 | if (rc) | |
2458 | goto bad; | |
2459 | ||
1d9bc6dc | 2460 | rc = policydb_index(p); |
1da177e4 LT |
2461 | if (rc) |
2462 | goto bad; | |
2463 | ||
9398c7f7 EP |
2464 | rc = -EINVAL; |
2465 | p->process_trans_perms = string_to_av_perm(p, p->process_class, "transition"); | |
2466 | p->process_trans_perms |= string_to_av_perm(p, p->process_class, "dyntransition"); | |
c6d3aaa4 SS |
2467 | if (!p->process_trans_perms) |
2468 | goto bad; | |
2469 | ||
692a8a23 EP |
2470 | rc = ocontext_read(p, info, fp); |
2471 | if (rc) | |
2472 | goto bad; | |
1da177e4 | 2473 | |
d1b43547 EP |
2474 | rc = genfs_read(p, fp); |
2475 | if (rc) | |
1da177e4 | 2476 | goto bad; |
1da177e4 | 2477 | |
9ee0c823 EP |
2478 | rc = range_read(p, fp); |
2479 | if (rc) | |
2480 | goto bad; | |
1da177e4 | 2481 | |
6371dcd3 EP |
2482 | rc = -ENOMEM; |
2483 | p->type_attr_map_array = flex_array_alloc(sizeof(struct ebitmap), | |
2484 | p->p_types.nprim, | |
2485 | GFP_KERNEL | __GFP_ZERO); | |
2486 | if (!p->type_attr_map_array) | |
2487 | goto bad; | |
2488 | ||
2489 | /* preallocate so we don't have to worry about the put ever failing */ | |
5a3ea878 | 2490 | rc = flex_array_prealloc(p->type_attr_map_array, 0, p->p_types.nprim, |
6371dcd3 EP |
2491 | GFP_KERNEL | __GFP_ZERO); |
2492 | if (rc) | |
782ebb99 SS |
2493 | goto bad; |
2494 | ||
2495 | for (i = 0; i < p->p_types.nprim; i++) { | |
6371dcd3 EP |
2496 | struct ebitmap *e = flex_array_get(p->type_attr_map_array, i); |
2497 | ||
2498 | BUG_ON(!e); | |
2499 | ebitmap_init(e); | |
782ebb99 | 2500 | if (p->policyvers >= POLICYDB_VERSION_AVTAB) { |
6371dcd3 EP |
2501 | rc = ebitmap_read(e, fp); |
2502 | if (rc) | |
782ebb99 SS |
2503 | goto bad; |
2504 | } | |
2505 | /* add the type itself as the degenerate case */ | |
6371dcd3 EP |
2506 | rc = ebitmap_set_bit(e, i, 1); |
2507 | if (rc) | |
2508 | goto bad; | |
782ebb99 SS |
2509 | } |
2510 | ||
d9250dea KK |
2511 | rc = policydb_bounds_sanity_check(p); |
2512 | if (rc) | |
2513 | goto bad; | |
2514 | ||
1da177e4 LT |
2515 | rc = 0; |
2516 | out: | |
2517 | return rc; | |
1da177e4 | 2518 | bad: |
1da177e4 LT |
2519 | policydb_destroy(p); |
2520 | goto out; | |
2521 | } | |
cee74f47 EP |
2522 | |
2523 | /* | |
2524 | * Write a MLS level structure to a policydb binary | |
2525 | * representation file. | |
2526 | */ | |
2527 | static int mls_write_level(struct mls_level *l, void *fp) | |
2528 | { | |
2529 | __le32 buf[1]; | |
2530 | int rc; | |
2531 | ||
2532 | buf[0] = cpu_to_le32(l->sens); | |
2533 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
2534 | if (rc) | |
2535 | return rc; | |
2536 | ||
2537 | rc = ebitmap_write(&l->cat, fp); | |
2538 | if (rc) | |
2539 | return rc; | |
2540 | ||
2541 | return 0; | |
2542 | } | |
2543 | ||
2544 | /* | |
2545 | * Write a MLS range structure to a policydb binary | |
2546 | * representation file. | |
2547 | */ | |
2548 | static int mls_write_range_helper(struct mls_range *r, void *fp) | |
2549 | { | |
2550 | __le32 buf[3]; | |
2551 | size_t items; | |
2552 | int rc, eq; | |
2553 | ||
2554 | eq = mls_level_eq(&r->level[1], &r->level[0]); | |
2555 | ||
2556 | if (eq) | |
2557 | items = 2; | |
2558 | else | |
2559 | items = 3; | |
2560 | buf[0] = cpu_to_le32(items-1); | |
2561 | buf[1] = cpu_to_le32(r->level[0].sens); | |
2562 | if (!eq) | |
2563 | buf[2] = cpu_to_le32(r->level[1].sens); | |
2564 | ||
5c7001b8 | 2565 | BUG_ON(items > ARRAY_SIZE(buf)); |
cee74f47 EP |
2566 | |
2567 | rc = put_entry(buf, sizeof(u32), items, fp); | |
2568 | if (rc) | |
2569 | return rc; | |
2570 | ||
2571 | rc = ebitmap_write(&r->level[0].cat, fp); | |
2572 | if (rc) | |
2573 | return rc; | |
2574 | if (!eq) { | |
2575 | rc = ebitmap_write(&r->level[1].cat, fp); | |
2576 | if (rc) | |
2577 | return rc; | |
2578 | } | |
2579 | ||
2580 | return 0; | |
2581 | } | |
2582 | ||
2583 | static int sens_write(void *vkey, void *datum, void *ptr) | |
2584 | { | |
2585 | char *key = vkey; | |
2586 | struct level_datum *levdatum = datum; | |
2587 | struct policy_data *pd = ptr; | |
2588 | void *fp = pd->fp; | |
2589 | __le32 buf[2]; | |
2590 | size_t len; | |
2591 | int rc; | |
2592 | ||
2593 | len = strlen(key); | |
2594 | buf[0] = cpu_to_le32(len); | |
2595 | buf[1] = cpu_to_le32(levdatum->isalias); | |
2596 | rc = put_entry(buf, sizeof(u32), 2, fp); | |
2597 | if (rc) | |
2598 | return rc; | |
2599 | ||
2600 | rc = put_entry(key, 1, len, fp); | |
2601 | if (rc) | |
2602 | return rc; | |
2603 | ||
2604 | rc = mls_write_level(levdatum->level, fp); | |
2605 | if (rc) | |
2606 | return rc; | |
2607 | ||
2608 | return 0; | |
2609 | } | |
2610 | ||
2611 | static int cat_write(void *vkey, void *datum, void *ptr) | |
2612 | { | |
2613 | char *key = vkey; | |
2614 | struct cat_datum *catdatum = datum; | |
2615 | struct policy_data *pd = ptr; | |
2616 | void *fp = pd->fp; | |
2617 | __le32 buf[3]; | |
2618 | size_t len; | |
2619 | int rc; | |
2620 | ||
2621 | len = strlen(key); | |
2622 | buf[0] = cpu_to_le32(len); | |
2623 | buf[1] = cpu_to_le32(catdatum->value); | |
2624 | buf[2] = cpu_to_le32(catdatum->isalias); | |
2625 | rc = put_entry(buf, sizeof(u32), 3, fp); | |
2626 | if (rc) | |
2627 | return rc; | |
2628 | ||
2629 | rc = put_entry(key, 1, len, fp); | |
2630 | if (rc) | |
2631 | return rc; | |
2632 | ||
2633 | return 0; | |
2634 | } | |
2635 | ||
c900ff32 | 2636 | static int role_trans_write(struct policydb *p, void *fp) |
cee74f47 | 2637 | { |
c900ff32 | 2638 | struct role_trans *r = p->role_tr; |
cee74f47 EP |
2639 | struct role_trans *tr; |
2640 | u32 buf[3]; | |
2641 | size_t nel; | |
2642 | int rc; | |
2643 | ||
2644 | nel = 0; | |
2645 | for (tr = r; tr; tr = tr->next) | |
2646 | nel++; | |
2647 | buf[0] = cpu_to_le32(nel); | |
2648 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
2649 | if (rc) | |
2650 | return rc; | |
2651 | for (tr = r; tr; tr = tr->next) { | |
2652 | buf[0] = cpu_to_le32(tr->role); | |
2653 | buf[1] = cpu_to_le32(tr->type); | |
2654 | buf[2] = cpu_to_le32(tr->new_role); | |
2655 | rc = put_entry(buf, sizeof(u32), 3, fp); | |
2656 | if (rc) | |
2657 | return rc; | |
c900ff32 HC |
2658 | if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) { |
2659 | buf[0] = cpu_to_le32(tr->tclass); | |
2660 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
2661 | if (rc) | |
2662 | return rc; | |
2663 | } | |
cee74f47 EP |
2664 | } |
2665 | ||
2666 | return 0; | |
2667 | } | |
2668 | ||
2669 | static int role_allow_write(struct role_allow *r, void *fp) | |
2670 | { | |
2671 | struct role_allow *ra; | |
2672 | u32 buf[2]; | |
2673 | size_t nel; | |
2674 | int rc; | |
2675 | ||
2676 | nel = 0; | |
2677 | for (ra = r; ra; ra = ra->next) | |
2678 | nel++; | |
2679 | buf[0] = cpu_to_le32(nel); | |
2680 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
2681 | if (rc) | |
2682 | return rc; | |
2683 | for (ra = r; ra; ra = ra->next) { | |
2684 | buf[0] = cpu_to_le32(ra->role); | |
2685 | buf[1] = cpu_to_le32(ra->new_role); | |
2686 | rc = put_entry(buf, sizeof(u32), 2, fp); | |
2687 | if (rc) | |
2688 | return rc; | |
2689 | } | |
2690 | return 0; | |
2691 | } | |
2692 | ||
2693 | /* | |
2694 | * Write a security context structure | |
2695 | * to a policydb binary representation file. | |
2696 | */ | |
2697 | static int context_write(struct policydb *p, struct context *c, | |
2698 | void *fp) | |
2699 | { | |
2700 | int rc; | |
2701 | __le32 buf[3]; | |
2702 | ||
2703 | buf[0] = cpu_to_le32(c->user); | |
2704 | buf[1] = cpu_to_le32(c->role); | |
2705 | buf[2] = cpu_to_le32(c->type); | |
2706 | ||
2707 | rc = put_entry(buf, sizeof(u32), 3, fp); | |
2708 | if (rc) | |
2709 | return rc; | |
2710 | ||
2711 | rc = mls_write_range_helper(&c->range, fp); | |
2712 | if (rc) | |
2713 | return rc; | |
2714 | ||
2715 | return 0; | |
2716 | } | |
2717 | ||
2718 | /* | |
2719 | * The following *_write functions are used to | |
2720 | * write the symbol data to a policy database | |
2721 | * binary representation file. | |
2722 | */ | |
2723 | ||
2724 | static int perm_write(void *vkey, void *datum, void *fp) | |
2725 | { | |
2726 | char *key = vkey; | |
2727 | struct perm_datum *perdatum = datum; | |
2728 | __le32 buf[2]; | |
2729 | size_t len; | |
2730 | int rc; | |
2731 | ||
2732 | len = strlen(key); | |
2733 | buf[0] = cpu_to_le32(len); | |
2734 | buf[1] = cpu_to_le32(perdatum->value); | |
2735 | rc = put_entry(buf, sizeof(u32), 2, fp); | |
2736 | if (rc) | |
2737 | return rc; | |
2738 | ||
2739 | rc = put_entry(key, 1, len, fp); | |
2740 | if (rc) | |
2741 | return rc; | |
2742 | ||
2743 | return 0; | |
2744 | } | |
2745 | ||
2746 | static int common_write(void *vkey, void *datum, void *ptr) | |
2747 | { | |
2748 | char *key = vkey; | |
2749 | struct common_datum *comdatum = datum; | |
2750 | struct policy_data *pd = ptr; | |
2751 | void *fp = pd->fp; | |
2752 | __le32 buf[4]; | |
2753 | size_t len; | |
2754 | int rc; | |
2755 | ||
2756 | len = strlen(key); | |
2757 | buf[0] = cpu_to_le32(len); | |
2758 | buf[1] = cpu_to_le32(comdatum->value); | |
2759 | buf[2] = cpu_to_le32(comdatum->permissions.nprim); | |
2760 | buf[3] = cpu_to_le32(comdatum->permissions.table->nel); | |
2761 | rc = put_entry(buf, sizeof(u32), 4, fp); | |
2762 | if (rc) | |
2763 | return rc; | |
2764 | ||
2765 | rc = put_entry(key, 1, len, fp); | |
2766 | if (rc) | |
2767 | return rc; | |
2768 | ||
2769 | rc = hashtab_map(comdatum->permissions.table, perm_write, fp); | |
2770 | if (rc) | |
2771 | return rc; | |
2772 | ||
2773 | return 0; | |
2774 | } | |
2775 | ||
a660bec1 RH |
2776 | static int type_set_write(struct type_set *t, void *fp) |
2777 | { | |
2778 | int rc; | |
2779 | __le32 buf[1]; | |
2780 | ||
2781 | if (ebitmap_write(&t->types, fp)) | |
2782 | return -EINVAL; | |
2783 | if (ebitmap_write(&t->negset, fp)) | |
2784 | return -EINVAL; | |
2785 | ||
2786 | buf[0] = cpu_to_le32(t->flags); | |
2787 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
2788 | if (rc) | |
2789 | return -EINVAL; | |
2790 | ||
2791 | return 0; | |
2792 | } | |
2793 | ||
cee74f47 EP |
2794 | static int write_cons_helper(struct policydb *p, struct constraint_node *node, |
2795 | void *fp) | |
2796 | { | |
2797 | struct constraint_node *c; | |
2798 | struct constraint_expr *e; | |
2799 | __le32 buf[3]; | |
2800 | u32 nel; | |
2801 | int rc; | |
2802 | ||
2803 | for (c = node; c; c = c->next) { | |
2804 | nel = 0; | |
2805 | for (e = c->expr; e; e = e->next) | |
2806 | nel++; | |
2807 | buf[0] = cpu_to_le32(c->permissions); | |
2808 | buf[1] = cpu_to_le32(nel); | |
2809 | rc = put_entry(buf, sizeof(u32), 2, fp); | |
2810 | if (rc) | |
2811 | return rc; | |
2812 | for (e = c->expr; e; e = e->next) { | |
2813 | buf[0] = cpu_to_le32(e->expr_type); | |
2814 | buf[1] = cpu_to_le32(e->attr); | |
2815 | buf[2] = cpu_to_le32(e->op); | |
2816 | rc = put_entry(buf, sizeof(u32), 3, fp); | |
2817 | if (rc) | |
2818 | return rc; | |
2819 | ||
2820 | switch (e->expr_type) { | |
2821 | case CEXPR_NAMES: | |
2822 | rc = ebitmap_write(&e->names, fp); | |
2823 | if (rc) | |
2824 | return rc; | |
a660bec1 RH |
2825 | if (p->policyvers >= |
2826 | POLICYDB_VERSION_CONSTRAINT_NAMES) { | |
2827 | rc = type_set_write(e->type_names, fp); | |
2828 | if (rc) | |
2829 | return rc; | |
2830 | } | |
cee74f47 EP |
2831 | break; |
2832 | default: | |
2833 | break; | |
2834 | } | |
2835 | } | |
2836 | } | |
2837 | ||
2838 | return 0; | |
2839 | } | |
2840 | ||
2841 | static int class_write(void *vkey, void *datum, void *ptr) | |
2842 | { | |
2843 | char *key = vkey; | |
2844 | struct class_datum *cladatum = datum; | |
2845 | struct policy_data *pd = ptr; | |
2846 | void *fp = pd->fp; | |
2847 | struct policydb *p = pd->p; | |
2848 | struct constraint_node *c; | |
2849 | __le32 buf[6]; | |
2850 | u32 ncons; | |
2851 | size_t len, len2; | |
2852 | int rc; | |
2853 | ||
2854 | len = strlen(key); | |
2855 | if (cladatum->comkey) | |
2856 | len2 = strlen(cladatum->comkey); | |
2857 | else | |
2858 | len2 = 0; | |
2859 | ||
2860 | ncons = 0; | |
2861 | for (c = cladatum->constraints; c; c = c->next) | |
2862 | ncons++; | |
2863 | ||
2864 | buf[0] = cpu_to_le32(len); | |
2865 | buf[1] = cpu_to_le32(len2); | |
2866 | buf[2] = cpu_to_le32(cladatum->value); | |
2867 | buf[3] = cpu_to_le32(cladatum->permissions.nprim); | |
2868 | if (cladatum->permissions.table) | |
2869 | buf[4] = cpu_to_le32(cladatum->permissions.table->nel); | |
2870 | else | |
2871 | buf[4] = 0; | |
2872 | buf[5] = cpu_to_le32(ncons); | |
2873 | rc = put_entry(buf, sizeof(u32), 6, fp); | |
2874 | if (rc) | |
2875 | return rc; | |
2876 | ||
2877 | rc = put_entry(key, 1, len, fp); | |
2878 | if (rc) | |
2879 | return rc; | |
2880 | ||
2881 | if (cladatum->comkey) { | |
2882 | rc = put_entry(cladatum->comkey, 1, len2, fp); | |
2883 | if (rc) | |
2884 | return rc; | |
2885 | } | |
2886 | ||
2887 | rc = hashtab_map(cladatum->permissions.table, perm_write, fp); | |
2888 | if (rc) | |
2889 | return rc; | |
2890 | ||
2891 | rc = write_cons_helper(p, cladatum->constraints, fp); | |
2892 | if (rc) | |
2893 | return rc; | |
2894 | ||
2895 | /* write out the validatetrans rule */ | |
2896 | ncons = 0; | |
2897 | for (c = cladatum->validatetrans; c; c = c->next) | |
2898 | ncons++; | |
2899 | ||
2900 | buf[0] = cpu_to_le32(ncons); | |
2901 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
2902 | if (rc) | |
2903 | return rc; | |
2904 | ||
2905 | rc = write_cons_helper(p, cladatum->validatetrans, fp); | |
2906 | if (rc) | |
2907 | return rc; | |
2908 | ||
aa893269 EP |
2909 | if (p->policyvers >= POLICYDB_VERSION_NEW_OBJECT_DEFAULTS) { |
2910 | buf[0] = cpu_to_le32(cladatum->default_user); | |
2911 | buf[1] = cpu_to_le32(cladatum->default_role); | |
2912 | buf[2] = cpu_to_le32(cladatum->default_range); | |
2913 | ||
2914 | rc = put_entry(buf, sizeof(uint32_t), 3, fp); | |
2915 | if (rc) | |
2916 | return rc; | |
2917 | } | |
2918 | ||
eed7795d EP |
2919 | if (p->policyvers >= POLICYDB_VERSION_DEFAULT_TYPE) { |
2920 | buf[0] = cpu_to_le32(cladatum->default_type); | |
2921 | rc = put_entry(buf, sizeof(uint32_t), 1, fp); | |
2922 | if (rc) | |
2923 | return rc; | |
2924 | } | |
2925 | ||
cee74f47 EP |
2926 | return 0; |
2927 | } | |
2928 | ||
2929 | static int role_write(void *vkey, void *datum, void *ptr) | |
2930 | { | |
2931 | char *key = vkey; | |
2932 | struct role_datum *role = datum; | |
2933 | struct policy_data *pd = ptr; | |
2934 | void *fp = pd->fp; | |
2935 | struct policydb *p = pd->p; | |
2936 | __le32 buf[3]; | |
2937 | size_t items, len; | |
2938 | int rc; | |
2939 | ||
2940 | len = strlen(key); | |
2941 | items = 0; | |
2942 | buf[items++] = cpu_to_le32(len); | |
2943 | buf[items++] = cpu_to_le32(role->value); | |
2944 | if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) | |
2945 | buf[items++] = cpu_to_le32(role->bounds); | |
2946 | ||
5c7001b8 | 2947 | BUG_ON(items > ARRAY_SIZE(buf)); |
cee74f47 EP |
2948 | |
2949 | rc = put_entry(buf, sizeof(u32), items, fp); | |
2950 | if (rc) | |
2951 | return rc; | |
2952 | ||
2953 | rc = put_entry(key, 1, len, fp); | |
2954 | if (rc) | |
2955 | return rc; | |
2956 | ||
2957 | rc = ebitmap_write(&role->dominates, fp); | |
2958 | if (rc) | |
2959 | return rc; | |
2960 | ||
2961 | rc = ebitmap_write(&role->types, fp); | |
2962 | if (rc) | |
2963 | return rc; | |
2964 | ||
2965 | return 0; | |
2966 | } | |
2967 | ||
2968 | static int type_write(void *vkey, void *datum, void *ptr) | |
2969 | { | |
2970 | char *key = vkey; | |
2971 | struct type_datum *typdatum = datum; | |
2972 | struct policy_data *pd = ptr; | |
2973 | struct policydb *p = pd->p; | |
2974 | void *fp = pd->fp; | |
2975 | __le32 buf[4]; | |
2976 | int rc; | |
2977 | size_t items, len; | |
2978 | ||
2979 | len = strlen(key); | |
2980 | items = 0; | |
2981 | buf[items++] = cpu_to_le32(len); | |
2982 | buf[items++] = cpu_to_le32(typdatum->value); | |
2983 | if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) { | |
2984 | u32 properties = 0; | |
2985 | ||
2986 | if (typdatum->primary) | |
2987 | properties |= TYPEDATUM_PROPERTY_PRIMARY; | |
2988 | ||
2989 | if (typdatum->attribute) | |
2990 | properties |= TYPEDATUM_PROPERTY_ATTRIBUTE; | |
2991 | ||
2992 | buf[items++] = cpu_to_le32(properties); | |
2993 | buf[items++] = cpu_to_le32(typdatum->bounds); | |
2994 | } else { | |
2995 | buf[items++] = cpu_to_le32(typdatum->primary); | |
2996 | } | |
5c7001b8 | 2997 | BUG_ON(items > ARRAY_SIZE(buf)); |
cee74f47 EP |
2998 | rc = put_entry(buf, sizeof(u32), items, fp); |
2999 | if (rc) | |
3000 | return rc; | |
3001 | ||
3002 | rc = put_entry(key, 1, len, fp); | |
3003 | if (rc) | |
3004 | return rc; | |
3005 | ||
3006 | return 0; | |
3007 | } | |
3008 | ||
3009 | static int user_write(void *vkey, void *datum, void *ptr) | |
3010 | { | |
3011 | char *key = vkey; | |
3012 | struct user_datum *usrdatum = datum; | |
3013 | struct policy_data *pd = ptr; | |
3014 | struct policydb *p = pd->p; | |
3015 | void *fp = pd->fp; | |
3016 | __le32 buf[3]; | |
3017 | size_t items, len; | |
3018 | int rc; | |
3019 | ||
3020 | len = strlen(key); | |
3021 | items = 0; | |
3022 | buf[items++] = cpu_to_le32(len); | |
3023 | buf[items++] = cpu_to_le32(usrdatum->value); | |
3024 | if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) | |
3025 | buf[items++] = cpu_to_le32(usrdatum->bounds); | |
5c7001b8 | 3026 | BUG_ON(items > ARRAY_SIZE(buf)); |
cee74f47 EP |
3027 | rc = put_entry(buf, sizeof(u32), items, fp); |
3028 | if (rc) | |
3029 | return rc; | |
3030 | ||
3031 | rc = put_entry(key, 1, len, fp); | |
3032 | if (rc) | |
3033 | return rc; | |
3034 | ||
3035 | rc = ebitmap_write(&usrdatum->roles, fp); | |
3036 | if (rc) | |
3037 | return rc; | |
3038 | ||
3039 | rc = mls_write_range_helper(&usrdatum->range, fp); | |
3040 | if (rc) | |
3041 | return rc; | |
3042 | ||
3043 | rc = mls_write_level(&usrdatum->dfltlevel, fp); | |
3044 | if (rc) | |
3045 | return rc; | |
3046 | ||
3047 | return 0; | |
3048 | } | |
3049 | ||
3050 | static int (*write_f[SYM_NUM]) (void *key, void *datum, | |
3051 | void *datap) = | |
3052 | { | |
3053 | common_write, | |
3054 | class_write, | |
3055 | role_write, | |
3056 | type_write, | |
3057 | user_write, | |
3058 | cond_write_bool, | |
3059 | sens_write, | |
3060 | cat_write, | |
3061 | }; | |
3062 | ||
3063 | static int ocontext_write(struct policydb *p, struct policydb_compat_info *info, | |
3064 | void *fp) | |
3065 | { | |
3066 | unsigned int i, j, rc; | |
3067 | size_t nel, len; | |
3068 | __le32 buf[3]; | |
3069 | u32 nodebuf[8]; | |
3070 | struct ocontext *c; | |
3071 | for (i = 0; i < info->ocon_num; i++) { | |
3072 | nel = 0; | |
3073 | for (c = p->ocontexts[i]; c; c = c->next) | |
3074 | nel++; | |
3075 | buf[0] = cpu_to_le32(nel); | |
3076 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
3077 | if (rc) | |
3078 | return rc; | |
3079 | for (c = p->ocontexts[i]; c; c = c->next) { | |
3080 | switch (i) { | |
3081 | case OCON_ISID: | |
3082 | buf[0] = cpu_to_le32(c->sid[0]); | |
3083 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
3084 | if (rc) | |
3085 | return rc; | |
3086 | rc = context_write(p, &c->context[0], fp); | |
3087 | if (rc) | |
3088 | return rc; | |
3089 | break; | |
3090 | case OCON_FS: | |
3091 | case OCON_NETIF: | |
3092 | len = strlen(c->u.name); | |
3093 | buf[0] = cpu_to_le32(len); | |
3094 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
3095 | if (rc) | |
3096 | return rc; | |
3097 | rc = put_entry(c->u.name, 1, len, fp); | |
3098 | if (rc) | |
3099 | return rc; | |
3100 | rc = context_write(p, &c->context[0], fp); | |
3101 | if (rc) | |
3102 | return rc; | |
3103 | rc = context_write(p, &c->context[1], fp); | |
3104 | if (rc) | |
3105 | return rc; | |
3106 | break; | |
3107 | case OCON_PORT: | |
3108 | buf[0] = cpu_to_le32(c->u.port.protocol); | |
3109 | buf[1] = cpu_to_le32(c->u.port.low_port); | |
3110 | buf[2] = cpu_to_le32(c->u.port.high_port); | |
3111 | rc = put_entry(buf, sizeof(u32), 3, fp); | |
3112 | if (rc) | |
3113 | return rc; | |
3114 | rc = context_write(p, &c->context[0], fp); | |
3115 | if (rc) | |
3116 | return rc; | |
3117 | break; | |
3118 | case OCON_NODE: | |
3119 | nodebuf[0] = c->u.node.addr; /* network order */ | |
3120 | nodebuf[1] = c->u.node.mask; /* network order */ | |
3121 | rc = put_entry(nodebuf, sizeof(u32), 2, fp); | |
3122 | if (rc) | |
3123 | return rc; | |
3124 | rc = context_write(p, &c->context[0], fp); | |
3125 | if (rc) | |
3126 | return rc; | |
3127 | break; | |
3128 | case OCON_FSUSE: | |
3129 | buf[0] = cpu_to_le32(c->v.behavior); | |
3130 | len = strlen(c->u.name); | |
3131 | buf[1] = cpu_to_le32(len); | |
3132 | rc = put_entry(buf, sizeof(u32), 2, fp); | |
3133 | if (rc) | |
3134 | return rc; | |
3135 | rc = put_entry(c->u.name, 1, len, fp); | |
3136 | if (rc) | |
3137 | return rc; | |
3138 | rc = context_write(p, &c->context[0], fp); | |
3139 | if (rc) | |
3140 | return rc; | |
3141 | break; | |
3142 | case OCON_NODE6: | |
3143 | for (j = 0; j < 4; j++) | |
3144 | nodebuf[j] = c->u.node6.addr[j]; /* network order */ | |
3145 | for (j = 0; j < 4; j++) | |
3146 | nodebuf[j + 4] = c->u.node6.mask[j]; /* network order */ | |
3147 | rc = put_entry(nodebuf, sizeof(u32), 8, fp); | |
3148 | if (rc) | |
3149 | return rc; | |
3150 | rc = context_write(p, &c->context[0], fp); | |
3151 | if (rc) | |
3152 | return rc; | |
3153 | break; | |
3154 | } | |
3155 | } | |
3156 | } | |
3157 | return 0; | |
3158 | } | |
3159 | ||
3160 | static int genfs_write(struct policydb *p, void *fp) | |
3161 | { | |
3162 | struct genfs *genfs; | |
3163 | struct ocontext *c; | |
3164 | size_t len; | |
3165 | __le32 buf[1]; | |
3166 | int rc; | |
3167 | ||
3168 | len = 0; | |
3169 | for (genfs = p->genfs; genfs; genfs = genfs->next) | |
3170 | len++; | |
3171 | buf[0] = cpu_to_le32(len); | |
3172 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
3173 | if (rc) | |
3174 | return rc; | |
3175 | for (genfs = p->genfs; genfs; genfs = genfs->next) { | |
3176 | len = strlen(genfs->fstype); | |
3177 | buf[0] = cpu_to_le32(len); | |
3178 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
3179 | if (rc) | |
3180 | return rc; | |
3181 | rc = put_entry(genfs->fstype, 1, len, fp); | |
3182 | if (rc) | |
3183 | return rc; | |
3184 | len = 0; | |
3185 | for (c = genfs->head; c; c = c->next) | |
3186 | len++; | |
3187 | buf[0] = cpu_to_le32(len); | |
3188 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
3189 | if (rc) | |
3190 | return rc; | |
3191 | for (c = genfs->head; c; c = c->next) { | |
3192 | len = strlen(c->u.name); | |
3193 | buf[0] = cpu_to_le32(len); | |
3194 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
3195 | if (rc) | |
3196 | return rc; | |
3197 | rc = put_entry(c->u.name, 1, len, fp); | |
3198 | if (rc) | |
3199 | return rc; | |
3200 | buf[0] = cpu_to_le32(c->v.sclass); | |
3201 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
3202 | if (rc) | |
3203 | return rc; | |
3204 | rc = context_write(p, &c->context[0], fp); | |
3205 | if (rc) | |
3206 | return rc; | |
3207 | } | |
3208 | } | |
3209 | return 0; | |
3210 | } | |
3211 | ||
3f058ef7 | 3212 | static int hashtab_cnt(void *key, void *data, void *ptr) |
cee74f47 EP |
3213 | { |
3214 | int *cnt = ptr; | |
3215 | *cnt = *cnt + 1; | |
3216 | ||
3217 | return 0; | |
3218 | } | |
3219 | ||
3220 | static int range_write_helper(void *key, void *data, void *ptr) | |
3221 | { | |
3222 | __le32 buf[2]; | |
3223 | struct range_trans *rt = key; | |
3224 | struct mls_range *r = data; | |
3225 | struct policy_data *pd = ptr; | |
3226 | void *fp = pd->fp; | |
3227 | struct policydb *p = pd->p; | |
3228 | int rc; | |
3229 | ||
3230 | buf[0] = cpu_to_le32(rt->source_type); | |
3231 | buf[1] = cpu_to_le32(rt->target_type); | |
3232 | rc = put_entry(buf, sizeof(u32), 2, fp); | |
3233 | if (rc) | |
3234 | return rc; | |
3235 | if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) { | |
3236 | buf[0] = cpu_to_le32(rt->target_class); | |
3237 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
3238 | if (rc) | |
3239 | return rc; | |
3240 | } | |
3241 | rc = mls_write_range_helper(r, fp); | |
3242 | if (rc) | |
3243 | return rc; | |
3244 | ||
3245 | return 0; | |
3246 | } | |
3247 | ||
3248 | static int range_write(struct policydb *p, void *fp) | |
3249 | { | |
cee74f47 | 3250 | __le32 buf[1]; |
b138004e | 3251 | int rc, nel; |
cee74f47 EP |
3252 | struct policy_data pd; |
3253 | ||
3254 | pd.p = p; | |
3255 | pd.fp = fp; | |
3256 | ||
3257 | /* count the number of entries in the hashtab */ | |
3258 | nel = 0; | |
3f058ef7 | 3259 | rc = hashtab_map(p->range_tr, hashtab_cnt, &nel); |
cee74f47 EP |
3260 | if (rc) |
3261 | return rc; | |
3262 | ||
3263 | buf[0] = cpu_to_le32(nel); | |
3264 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
3265 | if (rc) | |
3266 | return rc; | |
3267 | ||
3268 | /* actually write all of the entries */ | |
3269 | rc = hashtab_map(p->range_tr, range_write_helper, &pd); | |
3270 | if (rc) | |
3271 | return rc; | |
3272 | ||
3273 | return 0; | |
3274 | } | |
3275 | ||
2463c26d | 3276 | static int filename_write_helper(void *key, void *data, void *ptr) |
652bb9b0 | 3277 | { |
652bb9b0 | 3278 | __le32 buf[4]; |
2463c26d EP |
3279 | struct filename_trans *ft = key; |
3280 | struct filename_trans_datum *otype = data; | |
3281 | void *fp = ptr; | |
652bb9b0 | 3282 | int rc; |
2463c26d | 3283 | u32 len; |
652bb9b0 | 3284 | |
2463c26d EP |
3285 | len = strlen(ft->name); |
3286 | buf[0] = cpu_to_le32(len); | |
652bb9b0 EP |
3287 | rc = put_entry(buf, sizeof(u32), 1, fp); |
3288 | if (rc) | |
3289 | return rc; | |
3290 | ||
2463c26d EP |
3291 | rc = put_entry(ft->name, sizeof(char), len, fp); |
3292 | if (rc) | |
3293 | return rc; | |
652bb9b0 | 3294 | |
9085a642 EP |
3295 | buf[0] = cpu_to_le32(ft->stype); |
3296 | buf[1] = cpu_to_le32(ft->ttype); | |
3297 | buf[2] = cpu_to_le32(ft->tclass); | |
3298 | buf[3] = cpu_to_le32(otype->otype); | |
652bb9b0 | 3299 | |
2463c26d EP |
3300 | rc = put_entry(buf, sizeof(u32), 4, fp); |
3301 | if (rc) | |
3302 | return rc; | |
652bb9b0 | 3303 | |
652bb9b0 EP |
3304 | return 0; |
3305 | } | |
2463c26d EP |
3306 | |
3307 | static int filename_trans_write(struct policydb *p, void *fp) | |
3308 | { | |
3309 | u32 nel; | |
3310 | __le32 buf[1]; | |
3311 | int rc; | |
3312 | ||
ded50988 RL |
3313 | if (p->policyvers < POLICYDB_VERSION_FILENAME_TRANS) |
3314 | return 0; | |
3315 | ||
2463c26d EP |
3316 | nel = 0; |
3317 | rc = hashtab_map(p->filename_trans, hashtab_cnt, &nel); | |
3318 | if (rc) | |
3319 | return rc; | |
3320 | ||
3321 | buf[0] = cpu_to_le32(nel); | |
3322 | rc = put_entry(buf, sizeof(u32), 1, fp); | |
3323 | if (rc) | |
3324 | return rc; | |
3325 | ||
3326 | rc = hashtab_map(p->filename_trans, filename_write_helper, fp); | |
3327 | if (rc) | |
3328 | return rc; | |
3329 | ||
3330 | return 0; | |
3331 | } | |
3332 | ||
cee74f47 EP |
3333 | /* |
3334 | * Write the configuration data in a policy database | |
3335 | * structure to a policy database binary representation | |
3336 | * file. | |
3337 | */ | |
3338 | int policydb_write(struct policydb *p, void *fp) | |
3339 | { | |
3340 | unsigned int i, num_syms; | |
3341 | int rc; | |
3342 | __le32 buf[4]; | |
3343 | u32 config; | |
3344 | size_t len; | |
3345 | struct policydb_compat_info *info; | |
3346 | ||
3347 | /* | |
3348 | * refuse to write policy older than compressed avtab | |
3349 | * to simplify the writer. There are other tests dropped | |
3350 | * since we assume this throughout the writer code. Be | |
3351 | * careful if you ever try to remove this restriction | |
3352 | */ | |
3353 | if (p->policyvers < POLICYDB_VERSION_AVTAB) { | |
3354 | printk(KERN_ERR "SELinux: refusing to write policy version %d." | |
3355 | " Because it is less than version %d\n", p->policyvers, | |
3356 | POLICYDB_VERSION_AVTAB); | |
3357 | return -EINVAL; | |
3358 | } | |
3359 | ||
3360 | config = 0; | |
3361 | if (p->mls_enabled) | |
3362 | config |= POLICYDB_CONFIG_MLS; | |
3363 | ||
3364 | if (p->reject_unknown) | |
3365 | config |= REJECT_UNKNOWN; | |
3366 | if (p->allow_unknown) | |
3367 | config |= ALLOW_UNKNOWN; | |
3368 | ||
3369 | /* Write the magic number and string identifiers. */ | |
3370 | buf[0] = cpu_to_le32(POLICYDB_MAGIC); | |
3371 | len = strlen(POLICYDB_STRING); | |
3372 | buf[1] = cpu_to_le32(len); | |
3373 | rc = put_entry(buf, sizeof(u32), 2, fp); | |
3374 | if (rc) | |
3375 | return rc; | |
3376 | rc = put_entry(POLICYDB_STRING, 1, len, fp); | |
3377 | if (rc) | |
3378 | return rc; | |
3379 | ||
3380 | /* Write the version, config, and table sizes. */ | |
3381 | info = policydb_lookup_compat(p->policyvers); | |
3382 | if (!info) { | |
3383 | printk(KERN_ERR "SELinux: compatibility lookup failed for policy " | |
3384 | "version %d", p->policyvers); | |
9398c7f7 | 3385 | return -EINVAL; |
cee74f47 EP |
3386 | } |
3387 | ||
3388 | buf[0] = cpu_to_le32(p->policyvers); | |
3389 | buf[1] = cpu_to_le32(config); | |
3390 | buf[2] = cpu_to_le32(info->sym_num); | |
3391 | buf[3] = cpu_to_le32(info->ocon_num); | |
3392 | ||
3393 | rc = put_entry(buf, sizeof(u32), 4, fp); | |
3394 | if (rc) | |
3395 | return rc; | |
3396 | ||
3397 | if (p->policyvers >= POLICYDB_VERSION_POLCAP) { | |
3398 | rc = ebitmap_write(&p->policycaps, fp); | |
3399 | if (rc) | |
3400 | return rc; | |
3401 | } | |
3402 | ||
3403 | if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE) { | |
3404 | rc = ebitmap_write(&p->permissive_map, fp); | |
3405 | if (rc) | |
3406 | return rc; | |
3407 | } | |
3408 | ||
3409 | num_syms = info->sym_num; | |
3410 | for (i = 0; i < num_syms; i++) { | |
3411 | struct policy_data pd; | |
3412 | ||
3413 | pd.fp = fp; | |
3414 | pd.p = p; | |
3415 | ||
3416 | buf[0] = cpu_to_le32(p->symtab[i].nprim); | |
3417 | buf[1] = cpu_to_le32(p->symtab[i].table->nel); | |
3418 | ||
3419 | rc = put_entry(buf, sizeof(u32), 2, fp); | |
3420 | if (rc) | |
3421 | return rc; | |
3422 | rc = hashtab_map(p->symtab[i].table, write_f[i], &pd); | |
3423 | if (rc) | |
3424 | return rc; | |
3425 | } | |
3426 | ||
3427 | rc = avtab_write(p, &p->te_avtab, fp); | |
3428 | if (rc) | |
3429 | return rc; | |
3430 | ||
3431 | rc = cond_write_list(p, p->cond_list, fp); | |
3432 | if (rc) | |
3433 | return rc; | |
3434 | ||
c900ff32 | 3435 | rc = role_trans_write(p, fp); |
cee74f47 EP |
3436 | if (rc) |
3437 | return rc; | |
3438 | ||
3439 | rc = role_allow_write(p->role_allow, fp); | |
3440 | if (rc) | |
3441 | return rc; | |
3442 | ||
652bb9b0 EP |
3443 | rc = filename_trans_write(p, fp); |
3444 | if (rc) | |
3445 | return rc; | |
3446 | ||
cee74f47 EP |
3447 | rc = ocontext_write(p, info, fp); |
3448 | if (rc) | |
3449 | return rc; | |
3450 | ||
3451 | rc = genfs_write(p, fp); | |
3452 | if (rc) | |
3453 | return rc; | |
3454 | ||
3455 | rc = range_write(p, fp); | |
3456 | if (rc) | |
3457 | return rc; | |
3458 | ||
3459 | for (i = 0; i < p->p_types.nprim; i++) { | |
3460 | struct ebitmap *e = flex_array_get(p->type_attr_map_array, i); | |
3461 | ||
3462 | BUG_ON(!e); | |
3463 | rc = ebitmap_write(e, fp); | |
3464 | if (rc) | |
3465 | return rc; | |
3466 | } | |
3467 | ||
3468 | return 0; | |
3469 | } |