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SELinux: rename filename_compute_type argument to *type instead of *con
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / security / selinux / ss / policydb.c
CommitLineData
1da177e4
LT		 1/*
2 * Implementation of the policy database.
3 *
4 * Author : Stephen Smalley, <sds@epoch.ncsc.mil>
5 */
6
7/*
8 * Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com>
9 *
10 * Support for enhanced MLS infrastructure.
11 *
12 * Updated: Frank Mayer <mayerf@tresys.com> and Karl MacMillan <kmacmillan@tresys.com>
13 *
2ced3dfd 14 * Added conditional policy language extensions
1da177e4 15 *
3bb56b25
PM		 16 * Updated: Hewlett-Packard <paul.moore@hp.com>
17 *
18 * Added support for the policy capability bitmap
19 *
20 * Copyright (C) 2007 Hewlett-Packard Development Company, L.P.
1da177e4
LT		 21 * Copyright (C) 2004-2005 Trusted Computer Solutions, Inc.
22 * Copyright (C) 2003 - 2004 Tresys Technology, LLC
23 * This program is free software; you can redistribute it and/or modify
2ced3dfd 24 * it under the terms of the GNU General Public License as published by
1da177e4
LT		 25 * the Free Software Foundation, version 2.
26 */
27
28#include <linux/kernel.h>
9dc99780 29#include <linux/sched.h>
1da177e4
LT		 30#include <linux/slab.h>
31#include <linux/string.h>
32#include <linux/errno.h>
d9250dea 33#include <linux/audit.h>
6371dcd3 34#include <linux/flex_array.h>
1da177e4
LT		 35#include "security.h"
36
37#include "policydb.h"
38#include "conditional.h"
39#include "mls.h"
cee74f47 40#include "services.h"
1da177e4
LT		 41
42#define _DEBUG_HASHES
43
44#ifdef DEBUG_HASHES
634a539e 45static 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		 57static unsigned int symtab_sizes[SYM_NUM] = {
58 2,
59 32,
60 16,
61 512,
62 128,
63 16,
64 16,
65 16,
66};
67
68struct 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 */
75static 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 },
1da177e4
LT		 136};
137
138static struct policydb_compat_info *policydb_lookup_compat(int version)
139{
140 int i;
141 struct policydb_compat_info *info = NULL;
142
32725ad8 143 for (i = 0; i < ARRAY_SIZE(policydb_compat); i++) {
1da177e4
LT		 144 if (policydb_compat[i].version == version) {
145 info = &policydb_compat[i];
146 break;
147 }
148 }
149 return info;
150}
151
152/*
153 * Initialize the role table.
154 */
155static int roles_init(struct policydb *p)
156{
157 char *key = NULL;
158 int rc;
159 struct role_datum *role;
160
9398c7f7 161 rc = -ENOMEM;
89d155ef 162 role = kzalloc(sizeof(*role), GFP_KERNEL);
9398c7f7 163 if (!role)
1da177e4 164 goto out;
9398c7f7
EP		 165
166 rc = -EINVAL;
1da177e4 167 role->value = ++p->p_roles.nprim;
9398c7f7
EP		 168 if (role->value != OBJECT_R_VAL)
169 goto out;
170
171 rc = -ENOMEM;
b3139bbc 172 key = kstrdup(OBJECT_R, GFP_KERNEL);
9398c7f7
EP		 173 if (!key)
174 goto out;
175
1da177e4
LT		 176 rc = hashtab_insert(p->p_roles.table, key, role);
177 if (rc)
9398c7f7 178 goto out;
1da177e4 179
9398c7f7
EP		 180 return 0;
181out:
1da177e4 182 kfree(key);
1da177e4 183 kfree(role);
9398c7f7 184 return rc;
1da177e4
LT		 185}
186
2f3e82d6
SS		 187static u32 rangetr_hash(struct hashtab *h, const void *k)
188{
189 const struct range_trans *key = k;
190 return (key->source_type + (key->target_type << 3) +
191 (key->target_class << 5)) & (h->size - 1);
192}
193
194static int rangetr_cmp(struct hashtab *h, const void *k1, const void *k2)
195{
196 const struct range_trans *key1 = k1, *key2 = k2;
4419aae1
EP		 197 int v;
198
199 v = key1->source_type - key2->source_type;
200 if (v)
201 return v;
202
203 v = key1->target_type - key2->target_type;
204 if (v)
205 return v;
206
207 v = key1->target_class - key2->target_class;
208
209 return v;
2f3e82d6
SS		 210}
211
1da177e4
LT		 212/*
213 * Initialize a policy database structure.
214 */
215static int policydb_init(struct policydb *p)
216{
217 int i, rc;
218
219 memset(p, 0, sizeof(*p));
220
221 for (i = 0; i < SYM_NUM; i++) {
222 rc = symtab_init(&p->symtab[i], symtab_sizes[i]);
223 if (rc)
9398c7f7 224 goto out;
1da177e4
LT		 225 }
226
227 rc = avtab_init(&p->te_avtab);
228 if (rc)
9398c7f7 229 goto out;
1da177e4
LT		 230
231 rc = roles_init(p);
232 if (rc)
9398c7f7 233 goto out;
1da177e4
LT		 234
235 rc = cond_policydb_init(p);
236 if (rc)
9398c7f7 237 goto out;
1da177e4 238
2f3e82d6
SS		 239 p->range_tr = hashtab_create(rangetr_hash, rangetr_cmp, 256);
240 if (!p->range_tr)
9398c7f7 241 goto out;
2f3e82d6 242
3bb56b25 243 ebitmap_init(&p->policycaps);
64dbf074 244 ebitmap_init(&p->permissive_map);
3bb56b25 245
9398c7f7 246 return 0;
1da177e4 247out:
1da177e4
LT		 248 for (i = 0; i < SYM_NUM; i++)
249 hashtab_destroy(p->symtab[i].table);
9398c7f7 250 return rc;
1da177e4
LT		 251}
252
253/*
254 * The following *_index functions are used to
255 * define the val_to_name and val_to_struct arrays
256 * in a policy database structure. The val_to_name
257 * arrays are used when converting security context
258 * structures into string representations. The
259 * val_to_struct arrays are used when the attributes
260 * of a class, role, or user are needed.
261 */
262
263static int common_index(void *key, void *datum, void *datap)
264{
265 struct policydb *p;
266 struct common_datum *comdatum;
ac76c05b 267 struct flex_array *fa;
1da177e4
LT		 268
269 comdatum = datum;
270 p = datap;
271 if (!comdatum->value || comdatum->value > p->p_commons.nprim)
272 return -EINVAL;
ac76c05b
EP		 273
274 fa = p->sym_val_to_name[SYM_COMMONS];
275 if (flex_array_put_ptr(fa, comdatum->value - 1, key,
276 GFP_KERNEL | __GFP_ZERO))
277 BUG();
1da177e4
LT		 278 return 0;
279}
280
281static int class_index(void *key, void *datum, void *datap)
282{
283 struct policydb *p;
284 struct class_datum *cladatum;
ac76c05b 285 struct flex_array *fa;
1da177e4
LT		 286
287 cladatum = datum;
288 p = datap;
289 if (!cladatum->value || cladatum->value > p->p_classes.nprim)
290 return -EINVAL;
ac76c05b
EP		 291 fa = p->sym_val_to_name[SYM_CLASSES];
292 if (flex_array_put_ptr(fa, cladatum->value - 1, key,
293 GFP_KERNEL | __GFP_ZERO))
294 BUG();
1da177e4
LT		 295 p->class_val_to_struct[cladatum->value - 1] = cladatum;
296 return 0;
297}
298
299static int role_index(void *key, void *datum, void *datap)
300{
301 struct policydb *p;
302 struct role_datum *role;
ac76c05b 303 struct flex_array *fa;
1da177e4
LT		 304
305 role = datum;
306 p = datap;
d9250dea
KK		 307 if (!role->value
308 || role->value > p->p_roles.nprim
309 || role->bounds > p->p_roles.nprim)
1da177e4 310 return -EINVAL;
ac76c05b
EP		 311
312 fa = p->sym_val_to_name[SYM_ROLES];
313 if (flex_array_put_ptr(fa, role->value - 1, key,
314 GFP_KERNEL | __GFP_ZERO))
315 BUG();
1da177e4
LT		 316 p->role_val_to_struct[role->value - 1] = role;
317 return 0;
318}
319
320static int type_index(void *key, void *datum, void *datap)
321{
322 struct policydb *p;
323 struct type_datum *typdatum;
ac76c05b 324 struct flex_array *fa;
1da177e4
LT		 325
326 typdatum = datum;
327 p = datap;
328
329 if (typdatum->primary) {
d9250dea
KK		 330 if (!typdatum->value
331 || typdatum->value > p->p_types.nprim
332 || typdatum->bounds > p->p_types.nprim)
1da177e4 333 return -EINVAL;
ac76c05b
EP		 334 fa = p->sym_val_to_name[SYM_TYPES];
335 if (flex_array_put_ptr(fa, typdatum->value - 1, key,
336 GFP_KERNEL | __GFP_ZERO))
337 BUG();
338
339 fa = p->type_val_to_struct_array;
340 if (flex_array_put_ptr(fa, typdatum->value - 1, typdatum,
23bdecb0
EP		 341 GFP_KERNEL | __GFP_ZERO))
342 BUG();
1da177e4
LT		 343 }
344
345 return 0;
346}
347
348static int user_index(void *key, void *datum, void *datap)
349{
350 struct policydb *p;
351 struct user_datum *usrdatum;
ac76c05b 352 struct flex_array *fa;
1da177e4
LT		 353
354 usrdatum = datum;
355 p = datap;
d9250dea
KK		 356 if (!usrdatum->value
357 || usrdatum->value > p->p_users.nprim
358 || usrdatum->bounds > p->p_users.nprim)
1da177e4 359 return -EINVAL;
ac76c05b
EP		 360
361 fa = p->sym_val_to_name[SYM_USERS];
362 if (flex_array_put_ptr(fa, usrdatum->value - 1, key,
363 GFP_KERNEL | __GFP_ZERO))
364 BUG();
1da177e4
LT		 365 p->user_val_to_struct[usrdatum->value - 1] = usrdatum;
366 return 0;
367}
368
369static int sens_index(void *key, void *datum, void *datap)
370{
371 struct policydb *p;
372 struct level_datum *levdatum;
ac76c05b 373 struct flex_array *fa;
1da177e4
LT		 374
375 levdatum = datum;
376 p = datap;
377
378 if (!levdatum->isalias) {
379 if (!levdatum->level->sens ||
380 levdatum->level->sens > p->p_levels.nprim)
381 return -EINVAL;
ac76c05b
EP		 382 fa = p->sym_val_to_name[SYM_LEVELS];
383 if (flex_array_put_ptr(fa, levdatum->level->sens - 1, key,
384 GFP_KERNEL | __GFP_ZERO))
385 BUG();
1da177e4
LT		 386 }
387
388 return 0;
389}
390
391static int cat_index(void *key, void *datum, void *datap)
392{
393 struct policydb *p;
394 struct cat_datum *catdatum;
ac76c05b 395 struct flex_array *fa;
1da177e4
LT		 396
397 catdatum = datum;
398 p = datap;
399
400 if (!catdatum->isalias) {
401 if (!catdatum->value || catdatum->value > p->p_cats.nprim)
402 return -EINVAL;
ac76c05b
EP		 403 fa = p->sym_val_to_name[SYM_CATS];
404 if (flex_array_put_ptr(fa, catdatum->value - 1, key,
405 GFP_KERNEL | __GFP_ZERO))
406 BUG();
1da177e4
LT		 407 }
408
409 return 0;
410}
411
412static int (*index_f[SYM_NUM]) (void *key, void *datum, void *datap) =
413{
414 common_index,
415 class_index,
416 role_index,
417 type_index,
418 user_index,
419 cond_index_bool,
420 sens_index,
421 cat_index,
422};
423
1da177e4
LT		 424#ifdef DEBUG_HASHES
425static void symtab_hash_eval(struct symtab *s)
426{
427 int i;
428
429 for (i = 0; i < SYM_NUM; i++) {
430 struct hashtab *h = s[i].table;
431 struct hashtab_info info;
432
433 hashtab_stat(h, &info);
744ba35e 434 printk(KERN_DEBUG "SELinux: %s: %d entries and %d/%d buckets used, "
1da177e4
LT		 435 "longest chain length %d\n", symtab_name[i], h->nel,
436 info.slots_used, h->size, info.max_chain_len);
437 }
438}
2f3e82d6
SS		 439
440static void rangetr_hash_eval(struct hashtab *h)
441{
442 struct hashtab_info info;
443
444 hashtab_stat(h, &info);
445 printk(KERN_DEBUG "SELinux: rangetr: %d entries and %d/%d buckets used, "
446 "longest chain length %d\n", h->nel,
447 info.slots_used, h->size, info.max_chain_len);
448}
449#else
450static inline void rangetr_hash_eval(struct hashtab *h)
451{
452}
1da177e4
LT		 453#endif
454
455/*
456 * Define the other val_to_name and val_to_struct arrays
457 * in a policy database structure.
458 *
459 * Caller must clean up on failure.
460 */
1d9bc6dc 461static int policydb_index(struct policydb *p)
1da177e4 462{
9398c7f7 463 int i, rc;
1da177e4 464
454d972c 465 printk(KERN_DEBUG "SELinux: %d users, %d roles, %d types, %d bools",
1da177e4 466 p->p_users.nprim, p->p_roles.nprim, p->p_types.nprim, p->p_bools.nprim);
0719aaf5 467 if (p->mls_enabled)
1da177e4
LT		 468 printk(", %d sens, %d cats", p->p_levels.nprim,
469 p->p_cats.nprim);
470 printk("\n");
471
454d972c 472 printk(KERN_DEBUG "SELinux: %d classes, %d rules\n",
1da177e4
LT		 473 p->p_classes.nprim, p->te_avtab.nel);
474
475#ifdef DEBUG_HASHES
476 avtab_hash_eval(&p->te_avtab, "rules");
477 symtab_hash_eval(p->symtab);
478#endif
479
1d9bc6dc
EP		 480 rc = -ENOMEM;
481 p->class_val_to_struct =
482 kmalloc(p->p_classes.nprim * sizeof(*(p->class_val_to_struct)),
483 GFP_KERNEL);
484 if (!p->class_val_to_struct)
485 goto out;
486
9398c7f7 487 rc = -ENOMEM;
1da177e4
LT		 488 p->role_val_to_struct =
489 kmalloc(p->p_roles.nprim * sizeof(*(p->role_val_to_struct)),
2ced3dfd 490 GFP_KERNEL);
9398c7f7 491 if (!p->role_val_to_struct)
1da177e4 492 goto out;
1da177e4 493
9398c7f7 494 rc = -ENOMEM;
1da177e4
LT		 495 p->user_val_to_struct =
496 kmalloc(p->p_users.nprim * sizeof(*(p->user_val_to_struct)),
2ced3dfd 497 GFP_KERNEL);
9398c7f7 498 if (!p->user_val_to_struct)
1da177e4 499 goto out;
1da177e4 500
23bdecb0 501 /* Yes, I want the sizeof the pointer, not the structure */
9398c7f7 502 rc = -ENOMEM;
23bdecb0
EP		 503 p->type_val_to_struct_array = flex_array_alloc(sizeof(struct type_datum *),
504 p->p_types.nprim,
505 GFP_KERNEL | __GFP_ZERO);
506 if (!p->type_val_to_struct_array)
507 goto out;
508
509 rc = flex_array_prealloc(p->type_val_to_struct_array, 0,
510 p->p_types.nprim - 1, GFP_KERNEL | __GFP_ZERO);
511 if (rc)
d9250dea 512 goto out;
d9250dea 513
3ac285ff
DB		 514 rc = cond_init_bool_indexes(p);
515 if (rc)
1da177e4 516 goto out;
1da177e4 517
1d9bc6dc 518 for (i = 0; i < SYM_NUM; i++) {
9398c7f7 519 rc = -ENOMEM;
ac76c05b
EP		 520 p->sym_val_to_name[i] = flex_array_alloc(sizeof(char *),
521 p->symtab[i].nprim,
522 GFP_KERNEL | __GFP_ZERO);
9398c7f7 523 if (!p->sym_val_to_name[i])
1da177e4 524 goto out;
ac76c05b
EP		 525
526 rc = flex_array_prealloc(p->sym_val_to_name[i],
527 0, p->symtab[i].nprim - 1,
528 GFP_KERNEL | __GFP_ZERO);
529 if (rc)
530 goto out;
531
1da177e4
LT		 532 rc = hashtab_map(p->symtab[i].table, index_f[i], p);
533 if (rc)
534 goto out;
535 }
9398c7f7 536 rc = 0;
1da177e4
LT		 537out:
538 return rc;
539}
540
541/*
542 * The following *_destroy functions are used to
543 * free any memory allocated for each kind of
544 * symbol data in the policy database.
545 */
546
547static int perm_destroy(void *key, void *datum, void *p)
548{
549 kfree(key);
550 kfree(datum);
551 return 0;
552}
553
554static int common_destroy(void *key, void *datum, void *p)
555{
556 struct common_datum *comdatum;
557
558 kfree(key);
9398c7f7
EP		 559 if (datum) {
560 comdatum = datum;
561 hashtab_map(comdatum->permissions.table, perm_destroy, NULL);
562 hashtab_destroy(comdatum->permissions.table);
563 }
1da177e4
LT		 564 kfree(datum);
565 return 0;
566}
567
6cbda6b6 568static int cls_destroy(void *key, void *datum, void *p)
1da177e4
LT		 569{
570 struct class_datum *cladatum;
571 struct constraint_node *constraint, *ctemp;
572 struct constraint_expr *e, *etmp;
573
574 kfree(key);
9398c7f7
EP		 575 if (datum) {
576 cladatum = datum;
577 hashtab_map(cladatum->permissions.table, perm_destroy, NULL);
578 hashtab_destroy(cladatum->permissions.table);
579 constraint = cladatum->constraints;
580 while (constraint) {
581 e = constraint->expr;
582 while (e) {
583 ebitmap_destroy(&e->names);
584 etmp = e;
585 e = e->next;
586 kfree(etmp);
587 }
588 ctemp = constraint;
589 constraint = constraint->next;
590 kfree(ctemp);
1da177e4 591 }
9398c7f7
EP		 592
593 constraint = cladatum->validatetrans;
594 while (constraint) {
595 e = constraint->expr;
596 while (e) {
597 ebitmap_destroy(&e->names);
598 etmp = e;
599 e = e->next;
600 kfree(etmp);
601 }
602 ctemp = constraint;
603 constraint = constraint->next;
604 kfree(ctemp);
1da177e4 605 }
1da177e4 606
9398c7f7
EP		 607 kfree(cladatum->comkey);
608 }
1da177e4
LT		 609 kfree(datum);
610 return 0;
611}
612
613static int role_destroy(void *key, void *datum, void *p)
614{
615 struct role_datum *role;
616
617 kfree(key);
9398c7f7
EP		 618 if (datum) {
619 role = datum;
620 ebitmap_destroy(&role->dominates);
621 ebitmap_destroy(&role->types);
622 }
1da177e4
LT		 623 kfree(datum);
624 return 0;
625}
626
627static int type_destroy(void *key, void *datum, void *p)
628{
629 kfree(key);
630 kfree(datum);
631 return 0;
632}
633
634static int user_destroy(void *key, void *datum, void *p)
635{
636 struct user_datum *usrdatum;
637
638 kfree(key);
9398c7f7
EP		 639 if (datum) {
640 usrdatum = datum;
641 ebitmap_destroy(&usrdatum->roles);
642 ebitmap_destroy(&usrdatum->range.level[0].cat);
643 ebitmap_destroy(&usrdatum->range.level[1].cat);
644 ebitmap_destroy(&usrdatum->dfltlevel.cat);
645 }
1da177e4
LT		 646 kfree(datum);
647 return 0;
648}
649
650static int sens_destroy(void *key, void *datum, void *p)
651{
652 struct level_datum *levdatum;
653
654 kfree(key);
9398c7f7
EP		 655 if (datum) {
656 levdatum = datum;
657 ebitmap_destroy(&levdatum->level->cat);
658 kfree(levdatum->level);
659 }
1da177e4
LT		 660 kfree(datum);
661 return 0;
662}
663
664static int cat_destroy(void *key, void *datum, void *p)
665{
666 kfree(key);
667 kfree(datum);
668 return 0;
669}
670
671static int (*destroy_f[SYM_NUM]) (void *key, void *datum, void *datap) =
672{
673 common_destroy,
6cbda6b6 674 cls_destroy,
1da177e4
LT		 675 role_destroy,
676 type_destroy,
677 user_destroy,
678 cond_destroy_bool,
679 sens_destroy,
680 cat_destroy,
681};
682
2f3e82d6
SS		 683static int range_tr_destroy(void *key, void *datum, void *p)
684{
685 struct mls_range *rt = datum;
686 kfree(key);
687 ebitmap_destroy(&rt->level[0].cat);
688 ebitmap_destroy(&rt->level[1].cat);
689 kfree(datum);
690 cond_resched();
691 return 0;
692}
693
1da177e4
LT		 694static void ocontext_destroy(struct ocontext *c, int i)
695{
d1b43547
EP		 696 if (!c)
697 return;
698
1da177e4
LT		 699 context_destroy(&c->context[0]);
700 context_destroy(&c->context[1]);
701 if (i == OCON_ISID || i == OCON_FS ||
702 i == OCON_NETIF || i == OCON_FSUSE)
703 kfree(c->u.name);
704 kfree(c);
705}
706
707/*
708 * Free any memory allocated by a policy database structure.
709 */
710void policydb_destroy(struct policydb *p)
711{
712 struct ocontext *c, *ctmp;
713 struct genfs *g, *gtmp;
714 int i;
782ebb99
SS		 715 struct role_allow *ra, *lra = NULL;
716 struct role_trans *tr, *ltr = NULL;
652bb9b0 717 struct filename_trans *ft, *nft;
1da177e4
LT		 718
719 for (i = 0; i < SYM_NUM; i++) {
9dc99780 720 cond_resched();
1da177e4
LT		 721 hashtab_map(p->symtab[i].table, destroy_f[i], NULL);
722 hashtab_destroy(p->symtab[i].table);
723 }
724
ac76c05b
EP		 725 for (i = 0; i < SYM_NUM; i++) {
726 if (p->sym_val_to_name[i])
727 flex_array_free(p->sym_val_to_name[i]);
728 }
1da177e4 729
9a5f04bf
JJ		 730 kfree(p->class_val_to_struct);
731 kfree(p->role_val_to_struct);
732 kfree(p->user_val_to_struct);
23bdecb0
EP		 733 if (p->type_val_to_struct_array)
734 flex_array_free(p->type_val_to_struct_array);
1da177e4
LT		 735
736 avtab_destroy(&p->te_avtab);
737
738 for (i = 0; i < OCON_NUM; i++) {
9dc99780 739 cond_resched();
1da177e4
LT		 740 c = p->ocontexts[i];
741 while (c) {
742 ctmp = c;
743 c = c->next;
2ced3dfd 744 ocontext_destroy(ctmp, i);
1da177e4 745 }
6e8c751e 746 p->ocontexts[i] = NULL;
1da177e4
LT		 747 }
748
749 g = p->genfs;
750 while (g) {
9dc99780 751 cond_resched();
1da177e4
LT		 752 kfree(g->fstype);
753 c = g->head;
754 while (c) {
755 ctmp = c;
756 c = c->next;
2ced3dfd 757 ocontext_destroy(ctmp, OCON_FSUSE);
1da177e4
LT		 758 }
759 gtmp = g;
760 g = g->next;
761 kfree(gtmp);
762 }
6e8c751e 763 p->genfs = NULL;
1da177e4
LT		 764
765 cond_policydb_destroy(p);
766
782ebb99 767 for (tr = p->role_tr; tr; tr = tr->next) {
9dc99780 768 cond_resched();
a7f988ba 769 kfree(ltr);
782ebb99
SS		 770 ltr = tr;
771 }
a7f988ba 772 kfree(ltr);
782ebb99 773
2ced3dfd 774 for (ra = p->role_allow; ra; ra = ra->next) {
9dc99780 775 cond_resched();
a7f988ba 776 kfree(lra);
782ebb99
SS		 777 lra = ra;
778 }
a7f988ba 779 kfree(lra);
782ebb99 780
2f3e82d6
SS		 781 hashtab_map(p->range_tr, range_tr_destroy, NULL);
782 hashtab_destroy(p->range_tr);
782ebb99 783
6371dcd3
EP		 784 if (p->type_attr_map_array) {
785 for (i = 0; i < p->p_types.nprim; i++) {
786 struct ebitmap *e;
787
788 e = flex_array_get(p->type_attr_map_array, i);
789 if (!e)
790 continue;
791 ebitmap_destroy(e);
792 }
793 flex_array_free(p->type_attr_map_array);
282c1f5e 794 }
652bb9b0
EP		 795
796 ft = p->filename_trans;
797 while (ft) {
798 nft = ft->next;
799 kfree(ft->name);
800 kfree(ft);
801 ft = nft;
802 }
803
3bb56b25 804 ebitmap_destroy(&p->policycaps);
64dbf074 805 ebitmap_destroy(&p->permissive_map);
3f12070e 806
1da177e4
LT		 807 return;
808}
809
810/*
811 * Load the initial SIDs specified in a policy database
812 * structure into a SID table.
813 */
814int policydb_load_isids(struct policydb *p, struct sidtab *s)
815{
816 struct ocontext *head, *c;
817 int rc;
818
819 rc = sidtab_init(s);
820 if (rc) {
454d972c 821 printk(KERN_ERR "SELinux: out of memory on SID table init\n");
1da177e4
LT		 822 goto out;
823 }
824
825 head = p->ocontexts[OCON_ISID];
826 for (c = head; c; c = c->next) {
9398c7f7 827 rc = -EINVAL;
1da177e4 828 if (!c->context[0].user) {
9398c7f7
EP		 829 printk(KERN_ERR "SELinux: SID %s was never defined.\n",
830 c->u.name);
1da177e4
LT		 831 goto out;
832 }
9398c7f7
EP		 833
834 rc = sidtab_insert(s, c->sid[0], &c->context[0]);
835 if (rc) {
836 printk(KERN_ERR "SELinux: unable to load initial SID %s.\n",
837 c->u.name);
1da177e4
LT		 838 goto out;
839 }
840 }
9398c7f7 841 rc = 0;
1da177e4
LT		 842out:
843 return rc;
844}
845
45e5421e
SS		 846int policydb_class_isvalid(struct policydb *p, unsigned int class)
847{
848 if (!class || class > p->p_classes.nprim)
849 return 0;
850 return 1;
851}
852
853int policydb_role_isvalid(struct policydb *p, unsigned int role)
854{
855 if (!role || role > p->p_roles.nprim)
856 return 0;
857 return 1;
858}
859
860int policydb_type_isvalid(struct policydb *p, unsigned int type)
861{
862 if (!type || type > p->p_types.nprim)
863 return 0;
864 return 1;
865}
866
1da177e4
LT		 867/*
868 * Return 1 if the fields in the security context
869 * structure `c' are valid. Return 0 otherwise.
870 */
871int policydb_context_isvalid(struct policydb *p, struct context *c)
872{
873 struct role_datum *role;
874 struct user_datum *usrdatum;
875
876 if (!c->role || c->role > p->p_roles.nprim)
877 return 0;
878
879 if (!c->user || c->user > p->p_users.nprim)
880 return 0;
881
882 if (!c->type || c->type > p->p_types.nprim)
883 return 0;
884
885 if (c->role != OBJECT_R_VAL) {
886 /*
887 * Role must be authorized for the type.
888 */
889 role = p->role_val_to_struct[c->role - 1];
9398c7f7 890 if (!ebitmap_get_bit(&role->types, c->type - 1))
1da177e4
LT		 891 /* role may not be associated with type */
892 return 0;
893
894 /*
895 * User must be authorized for the role.
896 */
897 usrdatum = p->user_val_to_struct[c->user - 1];
898 if (!usrdatum)
899 return 0;
900
9398c7f7 901 if (!ebitmap_get_bit(&usrdatum->roles, c->role - 1))
1da177e4
LT		 902 /* user may not be associated with role */
903 return 0;
904 }
905
906 if (!mls_context_isvalid(p, c))
907 return 0;
908
909 return 1;
910}
911
912/*
913 * Read a MLS range structure from a policydb binary
914 * representation file.
915 */
916static int mls_read_range_helper(struct mls_range *r, void *fp)
917{
b5bf6c55
AD		 918 __le32 buf[2];
919 u32 items;
1da177e4
LT		 920 int rc;
921
922 rc = next_entry(buf, fp, sizeof(u32));
9398c7f7 923 if (rc)
1da177e4
LT		 924 goto out;
925
9398c7f7 926 rc = -EINVAL;
1da177e4
LT		 927 items = le32_to_cpu(buf[0]);
928 if (items > ARRAY_SIZE(buf)) {
454d972c 929 printk(KERN_ERR "SELinux: mls: range overflow\n");
1da177e4
LT		 930 goto out;
931 }
9398c7f7 932
1da177e4 933 rc = next_entry(buf, fp, sizeof(u32) * items);
9398c7f7 934 if (rc) {
454d972c 935 printk(KERN_ERR "SELinux: mls: truncated range\n");
1da177e4
LT		 936 goto out;
937 }
9398c7f7 938
1da177e4
LT		 939 r->level[0].sens = le32_to_cpu(buf[0]);
940 if (items > 1)
941 r->level[1].sens = le32_to_cpu(buf[1]);
942 else
943 r->level[1].sens = r->level[0].sens;
944
945 rc = ebitmap_read(&r->level[0].cat, fp);
946 if (rc) {
9398c7f7 947 printk(KERN_ERR "SELinux: mls: error reading low categories\n");
1da177e4
LT		 948 goto out;
949 }
950 if (items > 1) {
951 rc = ebitmap_read(&r->level[1].cat, fp);
952 if (rc) {
9398c7f7 953 printk(KERN_ERR "SELinux: mls: error reading high categories\n");
1da177e4
LT		 954 goto bad_high;
955 }
956 } else {
957 rc = ebitmap_cpy(&r->level[1].cat, &r->level[0].cat);
958 if (rc) {
454d972c 959 printk(KERN_ERR "SELinux: mls: out of memory\n");
1da177e4
LT		 960 goto bad_high;
961 }
962 }
963
9398c7f7 964 return 0;
1da177e4
LT		 965bad_high:
966 ebitmap_destroy(&r->level[0].cat);
9398c7f7
EP		 967out:
968 return rc;
1da177e4
LT		 969}
970
971/*
972 * Read and validate a security context structure
973 * from a policydb binary representation file.
974 */
975static int context_read_and_validate(struct context *c,
976 struct policydb *p,
977 void *fp)
978{
b5bf6c55 979 __le32 buf[3];
1da177e4
LT		 980 int rc;
981
982 rc = next_entry(buf, fp, sizeof buf);
9398c7f7 983 if (rc) {
454d972c 984 printk(KERN_ERR "SELinux: context truncated\n");
1da177e4
LT		 985 goto out;
986 }
987 c->user = le32_to_cpu(buf[0]);
988 c->role = le32_to_cpu(buf[1]);
989 c->type = le32_to_cpu(buf[2]);
990 if (p->policyvers >= POLICYDB_VERSION_MLS) {
9398c7f7
EP		 991 rc = mls_read_range_helper(&c->range, fp);
992 if (rc) {
993 printk(KERN_ERR "SELinux: error reading MLS range of context\n");
1da177e4
LT		 994 goto out;
995 }
996 }
997
9398c7f7 998 rc = -EINVAL;
1da177e4 999 if (!policydb_context_isvalid(p, c)) {
454d972c 1000 printk(KERN_ERR "SELinux: invalid security context\n");
1da177e4 1001 context_destroy(c);
9398c7f7 1002 goto out;
1da177e4 1003 }
9398c7f7 1004 rc = 0;
1da177e4
LT		 1005out:
1006 return rc;
1007}
1008
1009/*
1010 * The following *_read functions are used to
1011 * read the symbol data from a policy database
1012 * binary representation file.
1013 */
1014
1015static int perm_read(struct policydb *p, struct hashtab *h, void *fp)
1016{
1017 char *key = NULL;
1018 struct perm_datum *perdatum;
1019 int rc;
b5bf6c55
AD		 1020 __le32 buf[2];
1021 u32 len;
1da177e4 1022
9398c7f7 1023 rc = -ENOMEM;
89d155ef 1024 perdatum = kzalloc(sizeof(*perdatum), GFP_KERNEL);
9398c7f7
EP		 1025 if (!perdatum)
1026 goto bad;
1da177e4
LT		 1027
1028 rc = next_entry(buf, fp, sizeof buf);
9398c7f7 1029 if (rc)
1da177e4
LT		 1030 goto bad;
1031
1032 len = le32_to_cpu(buf[0]);
1033 perdatum->value = le32_to_cpu(buf[1]);
1034
9398c7f7 1035 rc = -ENOMEM;
2ced3dfd 1036 key = kmalloc(len + 1, GFP_KERNEL);
9398c7f7 1037 if (!key)
1da177e4 1038 goto bad;
9398c7f7 1039
1da177e4 1040 rc = next_entry(key, fp, len);
9398c7f7 1041 if (rc)
1da177e4 1042 goto bad;
df4ea865 1043 key[len] = '\0';
1da177e4
LT		 1044
1045 rc = hashtab_insert(h, key, perdatum);
1046 if (rc)
1047 goto bad;
9398c7f7
EP		 1048
1049 return 0;
1da177e4
LT		 1050bad:
1051 perm_destroy(key, perdatum, NULL);
9398c7f7 1052 return rc;
1da177e4
LT		 1053}
1054
1055static int common_read(struct policydb *p, struct hashtab *h, void *fp)
1056{
1057 char *key = NULL;
1058 struct common_datum *comdatum;
b5bf6c55
AD		 1059 __le32 buf[4];
1060 u32 len, nel;
1da177e4
LT		 1061 int i, rc;
1062
9398c7f7 1063 rc = -ENOMEM;
89d155ef 1064 comdatum = kzalloc(sizeof(*comdatum), GFP_KERNEL);
9398c7f7
EP		 1065 if (!comdatum)
1066 goto bad;
1da177e4
LT		 1067
1068 rc = next_entry(buf, fp, sizeof buf);
9398c7f7 1069 if (rc)
1da177e4
LT		 1070 goto bad;
1071
1072 len = le32_to_cpu(buf[0]);
1073 comdatum->value = le32_to_cpu(buf[1]);
1074
1075 rc = symtab_init(&comdatum->permissions, PERM_SYMTAB_SIZE);
1076 if (rc)
1077 goto bad;
1078 comdatum->permissions.nprim = le32_to_cpu(buf[2]);
1079 nel = le32_to_cpu(buf[3]);
1080
9398c7f7 1081 rc = -ENOMEM;
2ced3dfd 1082 key = kmalloc(len + 1, GFP_KERNEL);
9398c7f7 1083 if (!key)
1da177e4 1084 goto bad;
9398c7f7 1085
1da177e4 1086 rc = next_entry(key, fp, len);
9398c7f7 1087 if (rc)
1da177e4 1088 goto bad;
df4ea865 1089 key[len] = '\0';
1da177e4
LT		 1090
1091 for (i = 0; i < nel; i++) {
1092 rc = perm_read(p, comdatum->permissions.table, fp);
1093 if (rc)
1094 goto bad;
1095 }
1096
1097 rc = hashtab_insert(h, key, comdatum);
1098 if (rc)
1099 goto bad;
9398c7f7 1100 return 0;
1da177e4
LT		 1101bad:
1102 common_destroy(key, comdatum, NULL);
9398c7f7 1103 return rc;
1da177e4
LT		 1104}
1105
1106static int read_cons_helper(struct constraint_node **nodep, int ncons,
2ced3dfd 1107 int allowxtarget, void *fp)
1da177e4
LT		 1108{
1109 struct constraint_node *c, *lc;
1110 struct constraint_expr *e, *le;
b5bf6c55
AD		 1111 __le32 buf[3];
1112 u32 nexpr;
1da177e4
LT		 1113 int rc, i, j, depth;
1114
1115 lc = NULL;
1116 for (i = 0; i < ncons; i++) {
89d155ef 1117 c = kzalloc(sizeof(*c), GFP_KERNEL);
1da177e4
LT		 1118 if (!c)
1119 return -ENOMEM;
1da177e4 1120
2ced3dfd 1121 if (lc)
1da177e4 1122 lc->next = c;
2ced3dfd 1123 else
1da177e4 1124 *nodep = c;
1da177e4
LT		 1125
1126 rc = next_entry(buf, fp, (sizeof(u32) * 2));
9398c7f7 1127 if (rc)
1da177e4
LT		 1128 return rc;
1129 c->permissions = le32_to_cpu(buf[0]);
1130 nexpr = le32_to_cpu(buf[1]);
1131 le = NULL;
1132 depth = -1;
1133 for (j = 0; j < nexpr; j++) {
89d155ef 1134 e = kzalloc(sizeof(*e), GFP_KERNEL);
1da177e4
LT		 1135 if (!e)
1136 return -ENOMEM;
1da177e4 1137
2ced3dfd 1138 if (le)
1da177e4 1139 le->next = e;
2ced3dfd 1140 else
1da177e4 1141 c->expr = e;
1da177e4
LT		 1142
1143 rc = next_entry(buf, fp, (sizeof(u32) * 3));
9398c7f7 1144 if (rc)
1da177e4
LT		 1145 return rc;
1146 e->expr_type = le32_to_cpu(buf[0]);
1147 e->attr = le32_to_cpu(buf[1]);
1148 e->op = le32_to_cpu(buf[2]);
1149
1150 switch (e->expr_type) {
1151 case CEXPR_NOT:
1152 if (depth < 0)
1153 return -EINVAL;
1154 break;
1155 case CEXPR_AND:
1156 case CEXPR_OR:
1157 if (depth < 1)
1158 return -EINVAL;
1159 depth--;
1160 break;
1161 case CEXPR_ATTR:
1162 if (depth == (CEXPR_MAXDEPTH - 1))
1163 return -EINVAL;
1164 depth++;
1165 break;
1166 case CEXPR_NAMES:
1167 if (!allowxtarget && (e->attr & CEXPR_XTARGET))
1168 return -EINVAL;
1169 if (depth == (CEXPR_MAXDEPTH - 1))
1170 return -EINVAL;
1171 depth++;
9398c7f7
EP		 1172 rc = ebitmap_read(&e->names, fp);
1173 if (rc)
1174 return rc;
1da177e4
LT		 1175 break;
1176 default:
1177 return -EINVAL;
1178 }
1179 le = e;
1180 }
1181 if (depth != 0)
1182 return -EINVAL;
1183 lc = c;
1184 }
1185
1186 return 0;
1187}
1188
1189static int class_read(struct policydb *p, struct hashtab *h, void *fp)
1190{
1191 char *key = NULL;
1192 struct class_datum *cladatum;
b5bf6c55
AD		 1193 __le32 buf[6];
1194 u32 len, len2, ncons, nel;
1da177e4
LT		 1195 int i, rc;
1196
9398c7f7 1197 rc = -ENOMEM;
89d155ef 1198 cladatum = kzalloc(sizeof(*cladatum), GFP_KERNEL);
9398c7f7
EP		 1199 if (!cladatum)
1200 goto bad;
1da177e4
LT		 1201
1202 rc = next_entry(buf, fp, sizeof(u32)*6);
9398c7f7 1203 if (rc)
1da177e4
LT		 1204 goto bad;
1205
1206 len = le32_to_cpu(buf[0]);
1207 len2 = le32_to_cpu(buf[1]);
1208 cladatum->value = le32_to_cpu(buf[2]);
1209
1210 rc = symtab_init(&cladatum->permissions, PERM_SYMTAB_SIZE);
1211 if (rc)
1212 goto bad;
1213 cladatum->permissions.nprim = le32_to_cpu(buf[3]);
1214 nel = le32_to_cpu(buf[4]);
1215
1216 ncons = le32_to_cpu(buf[5]);
1217
9398c7f7 1218 rc = -ENOMEM;
2ced3dfd 1219 key = kmalloc(len + 1, GFP_KERNEL);
9398c7f7 1220 if (!key)
1da177e4 1221 goto bad;
9398c7f7 1222
1da177e4 1223 rc = next_entry(key, fp, len);
9398c7f7 1224 if (rc)
1da177e4 1225 goto bad;
df4ea865 1226 key[len] = '\0';
1da177e4
LT		 1227
1228 if (len2) {
9398c7f7 1229 rc = -ENOMEM;
2ced3dfd 1230 cladatum->comkey = kmalloc(len2 + 1, GFP_KERNEL);
9398c7f7 1231 if (!cladatum->comkey)
1da177e4 1232 goto bad;
1da177e4 1233 rc = next_entry(cladatum->comkey, fp, len2);
9398c7f7 1234 if (rc)
1da177e4 1235 goto bad;
df4ea865 1236 cladatum->comkey[len2] = '\0';
1da177e4 1237
9398c7f7
EP		 1238 rc = -EINVAL;
1239 cladatum->comdatum = hashtab_search(p->p_commons.table, cladatum->comkey);
1da177e4 1240 if (!cladatum->comdatum) {
9398c7f7 1241 printk(KERN_ERR "SELinux: unknown common %s\n", cladatum->comkey);
1da177e4
LT		 1242 goto bad;
1243 }
1244 }
1245 for (i = 0; i < nel; i++) {
1246 rc = perm_read(p, cladatum->permissions.table, fp);
1247 if (rc)
1248 goto bad;
1249 }
1250
1251 rc = read_cons_helper(&cladatum->constraints, ncons, 0, fp);
1252 if (rc)
1253 goto bad;
1254
1255 if (p->policyvers >= POLICYDB_VERSION_VALIDATETRANS) {
1256 /* grab the validatetrans rules */
1257 rc = next_entry(buf, fp, sizeof(u32));
9398c7f7 1258 if (rc)
1da177e4
LT		 1259 goto bad;
1260 ncons = le32_to_cpu(buf[0]);
1261 rc = read_cons_helper(&cladatum->validatetrans, ncons, 1, fp);
1262 if (rc)
1263 goto bad;
1264 }
1265
1266 rc = hashtab_insert(h, key, cladatum);
1267 if (rc)
1268 goto bad;
1269
9398c7f7 1270 return 0;
1da177e4 1271bad:
6cbda6b6 1272 cls_destroy(key, cladatum, NULL);
9398c7f7 1273 return rc;
1da177e4
LT		 1274}
1275
1276static int role_read(struct policydb *p, struct hashtab *h, void *fp)
1277{
1278 char *key = NULL;
1279 struct role_datum *role;
d9250dea
KK		 1280 int rc, to_read = 2;
1281 __le32 buf[3];
b5bf6c55 1282 u32 len;
1da177e4 1283
9398c7f7 1284 rc = -ENOMEM;
89d155ef 1285 role = kzalloc(sizeof(*role), GFP_KERNEL);
9398c7f7
EP		 1286 if (!role)
1287 goto bad;
1da177e4 1288
d9250dea
KK		 1289 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1290 to_read = 3;
1291
1292 rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
9398c7f7 1293 if (rc)
1da177e4
LT		 1294 goto bad;
1295
1296 len = le32_to_cpu(buf[0]);
1297 role->value = le32_to_cpu(buf[1]);
d9250dea
KK		 1298 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1299 role->bounds = le32_to_cpu(buf[2]);
1da177e4 1300
9398c7f7 1301 rc = -ENOMEM;
2ced3dfd 1302 key = kmalloc(len + 1, GFP_KERNEL);
9398c7f7 1303 if (!key)
1da177e4 1304 goto bad;
9398c7f7 1305
1da177e4 1306 rc = next_entry(key, fp, len);
9398c7f7 1307 if (rc)
1da177e4 1308 goto bad;
df4ea865 1309 key[len] = '\0';
1da177e4
LT		 1310
1311 rc = ebitmap_read(&role->dominates, fp);
1312 if (rc)
1313 goto bad;
1314
1315 rc = ebitmap_read(&role->types, fp);
1316 if (rc)
1317 goto bad;
1318
1319 if (strcmp(key, OBJECT_R) == 0) {
9398c7f7 1320 rc = -EINVAL;
1da177e4 1321 if (role->value != OBJECT_R_VAL) {
744ba35e 1322 printk(KERN_ERR "SELinux: Role %s has wrong value %d\n",
1da177e4 1323 OBJECT_R, role->value);
1da177e4
LT		 1324 goto bad;
1325 }
1326 rc = 0;
1327 goto bad;
1328 }
1329
1330 rc = hashtab_insert(h, key, role);
1331 if (rc)
1332 goto bad;
9398c7f7 1333 return 0;
1da177e4
LT		 1334bad:
1335 role_destroy(key, role, NULL);
9398c7f7 1336 return rc;
1da177e4
LT		 1337}
1338
1339static int type_read(struct policydb *p, struct hashtab *h, void *fp)
1340{
1341 char *key = NULL;
1342 struct type_datum *typdatum;
d9250dea
KK		 1343 int rc, to_read = 3;
1344 __le32 buf[4];
b5bf6c55 1345 u32 len;
1da177e4 1346
9398c7f7 1347 rc = -ENOMEM;
2ced3dfd 1348 typdatum = kzalloc(sizeof(*typdatum), GFP_KERNEL);
9398c7f7
EP		 1349 if (!typdatum)
1350 goto bad;
1da177e4 1351
d9250dea
KK		 1352 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1353 to_read = 4;
1354
1355 rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
9398c7f7 1356 if (rc)
1da177e4
LT		 1357 goto bad;
1358
1359 len = le32_to_cpu(buf[0]);
1360 typdatum->value = le32_to_cpu(buf[1]);
d9250dea
KK		 1361 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) {
1362 u32 prop = le32_to_cpu(buf[2]);
1363
1364 if (prop & TYPEDATUM_PROPERTY_PRIMARY)
1365 typdatum->primary = 1;
1366 if (prop & TYPEDATUM_PROPERTY_ATTRIBUTE)
1367 typdatum->attribute = 1;
1368
1369 typdatum->bounds = le32_to_cpu(buf[3]);
1370 } else {
1371 typdatum->primary = le32_to_cpu(buf[2]);
1372 }
1da177e4 1373
9398c7f7 1374 rc = -ENOMEM;
2ced3dfd 1375 key = kmalloc(len + 1, GFP_KERNEL);
9398c7f7 1376 if (!key)
1da177e4 1377 goto bad;
1da177e4 1378 rc = next_entry(key, fp, len);
9398c7f7 1379 if (rc)
1da177e4 1380 goto bad;
df4ea865 1381 key[len] = '\0';
1da177e4
LT		 1382
1383 rc = hashtab_insert(h, key, typdatum);
1384 if (rc)
1385 goto bad;
9398c7f7 1386 return 0;
1da177e4
LT		 1387bad:
1388 type_destroy(key, typdatum, NULL);
9398c7f7 1389 return rc;
1da177e4
LT		 1390}
1391
1392
1393/*
1394 * Read a MLS level structure from a policydb binary
1395 * representation file.
1396 */
1397static int mls_read_level(struct mls_level *lp, void *fp)
1398{
b5bf6c55 1399 __le32 buf[1];
1da177e4
LT		 1400 int rc;
1401
1402 memset(lp, 0, sizeof(*lp));
1403
1404 rc = next_entry(buf, fp, sizeof buf);
9398c7f7 1405 if (rc) {
454d972c 1406 printk(KERN_ERR "SELinux: mls: truncated level\n");
9398c7f7 1407 return rc;
1da177e4
LT		 1408 }
1409 lp->sens = le32_to_cpu(buf[0]);
1410
9398c7f7
EP		 1411 rc = ebitmap_read(&lp->cat, fp);
1412 if (rc) {
1413 printk(KERN_ERR "SELinux: mls: error reading level categories\n");
1414 return rc;
1da177e4
LT		 1415 }
1416 return 0;
1da177e4
LT		 1417}
1418
1419static int user_read(struct policydb *p, struct hashtab *h, void *fp)
1420{
1421 char *key = NULL;
1422 struct user_datum *usrdatum;
d9250dea
KK		 1423 int rc, to_read = 2;
1424 __le32 buf[3];
b5bf6c55 1425 u32 len;
1da177e4 1426
9398c7f7 1427 rc = -ENOMEM;
89d155ef 1428 usrdatum = kzalloc(sizeof(*usrdatum), GFP_KERNEL);
9398c7f7
EP		 1429 if (!usrdatum)
1430 goto bad;
1da177e4 1431
d9250dea
KK		 1432 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1433 to_read = 3;
1434
1435 rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
9398c7f7 1436 if (rc)
1da177e4
LT		 1437 goto bad;
1438
1439 len = le32_to_cpu(buf[0]);
1440 usrdatum->value = le32_to_cpu(buf[1]);
d9250dea
KK		 1441 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1442 usrdatum->bounds = le32_to_cpu(buf[2]);
1da177e4 1443
9398c7f7 1444 rc = -ENOMEM;
2ced3dfd 1445 key = kmalloc(len + 1, GFP_KERNEL);
9398c7f7 1446 if (!key)
1da177e4 1447 goto bad;
1da177e4 1448 rc = next_entry(key, fp, len);
9398c7f7 1449 if (rc)
1da177e4 1450 goto bad;
df4ea865 1451 key[len] = '\0';
1da177e4
LT		 1452
1453 rc = ebitmap_read(&usrdatum->roles, fp);
1454 if (rc)
1455 goto bad;
1456
1457 if (p->policyvers >= POLICYDB_VERSION_MLS) {
1458 rc = mls_read_range_helper(&usrdatum->range, fp);
1459 if (rc)
1460 goto bad;
1461 rc = mls_read_level(&usrdatum->dfltlevel, fp);
1462 if (rc)
1463 goto bad;
1464 }
1465
1466 rc = hashtab_insert(h, key, usrdatum);
1467 if (rc)
1468 goto bad;
9398c7f7 1469 return 0;
1da177e4
LT		 1470bad:
1471 user_destroy(key, usrdatum, NULL);
9398c7f7 1472 return rc;
1da177e4
LT		 1473}
1474
1475static int sens_read(struct policydb *p, struct hashtab *h, void *fp)
1476{
1477 char *key = NULL;
1478 struct level_datum *levdatum;
1479 int rc;
b5bf6c55
AD		 1480 __le32 buf[2];
1481 u32 len;
1da177e4 1482
9398c7f7 1483 rc = -ENOMEM;
89d155ef 1484 levdatum = kzalloc(sizeof(*levdatum), GFP_ATOMIC);
9398c7f7
EP		 1485 if (!levdatum)
1486 goto bad;
1da177e4
LT		 1487
1488 rc = next_entry(buf, fp, sizeof buf);
9398c7f7 1489 if (rc)
1da177e4
LT		 1490 goto bad;
1491
1492 len = le32_to_cpu(buf[0]);
1493 levdatum->isalias = le32_to_cpu(buf[1]);
1494
9398c7f7 1495 rc = -ENOMEM;
2ced3dfd 1496 key = kmalloc(len + 1, GFP_ATOMIC);
9398c7f7 1497 if (!key)
1da177e4 1498 goto bad;
1da177e4 1499 rc = next_entry(key, fp, len);
9398c7f7 1500 if (rc)
1da177e4 1501 goto bad;
df4ea865 1502 key[len] = '\0';
1da177e4 1503
9398c7f7 1504 rc = -ENOMEM;
1da177e4 1505 levdatum->level = kmalloc(sizeof(struct mls_level), GFP_ATOMIC);
9398c7f7 1506 if (!levdatum->level)
1da177e4 1507 goto bad;
9398c7f7
EP		 1508
1509 rc = mls_read_level(levdatum->level, fp);
1510 if (rc)
1da177e4 1511 goto bad;
1da177e4
LT		 1512
1513 rc = hashtab_insert(h, key, levdatum);
1514 if (rc)
1515 goto bad;
9398c7f7 1516 return 0;
1da177e4
LT		 1517bad:
1518 sens_destroy(key, levdatum, NULL);
9398c7f7 1519 return rc;
1da177e4
LT		 1520}
1521
1522static int cat_read(struct policydb *p, struct hashtab *h, void *fp)
1523{
1524 char *key = NULL;
1525 struct cat_datum *catdatum;
1526 int rc;
b5bf6c55
AD		 1527 __le32 buf[3];
1528 u32 len;
1da177e4 1529
9398c7f7 1530 rc = -ENOMEM;
89d155ef 1531 catdatum = kzalloc(sizeof(*catdatum), GFP_ATOMIC);
9398c7f7
EP		 1532 if (!catdatum)
1533 goto bad;
1da177e4
LT		 1534
1535 rc = next_entry(buf, fp, sizeof buf);
9398c7f7 1536 if (rc)
1da177e4
LT		 1537 goto bad;
1538
1539 len = le32_to_cpu(buf[0]);
1540 catdatum->value = le32_to_cpu(buf[1]);
1541 catdatum->isalias = le32_to_cpu(buf[2]);
1542
9398c7f7 1543 rc = -ENOMEM;
2ced3dfd 1544 key = kmalloc(len + 1, GFP_ATOMIC);
9398c7f7 1545 if (!key)
1da177e4 1546 goto bad;
1da177e4 1547 rc = next_entry(key, fp, len);
9398c7f7 1548 if (rc)
1da177e4 1549 goto bad;
df4ea865 1550 key[len] = '\0';
1da177e4
LT		 1551
1552 rc = hashtab_insert(h, key, catdatum);
1553 if (rc)
1554 goto bad;
9398c7f7 1555 return 0;
1da177e4
LT		 1556bad:
1557 cat_destroy(key, catdatum, NULL);
9398c7f7 1558 return rc;
1da177e4
LT		 1559}
1560
1561static int (*read_f[SYM_NUM]) (struct policydb *p, struct hashtab *h, void *fp) =
1562{
1563 common_read,
1564 class_read,
1565 role_read,
1566 type_read,
1567 user_read,
1568 cond_read_bool,
1569 sens_read,
1570 cat_read,
1571};
1572
d9250dea
KK		 1573static int user_bounds_sanity_check(void *key, void *datum, void *datap)
1574{
1575 struct user_datum *upper, *user;
1576 struct policydb *p = datap;
1577 int depth = 0;
1578
1579 upper = user = datum;
1580 while (upper->bounds) {
1581 struct ebitmap_node *node;
1582 unsigned long bit;
1583
1584 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1585 printk(KERN_ERR "SELinux: user %s: "
1586 "too deep or looped boundary",
1587 (char *) key);
1588 return -EINVAL;
1589 }
1590
1591 upper = p->user_val_to_struct[upper->bounds - 1];
1592 ebitmap_for_each_positive_bit(&user->roles, node, bit) {
1593 if (ebitmap_get_bit(&upper->roles, bit))
1594 continue;
1595
1596 printk(KERN_ERR
1597 "SELinux: boundary violated policy: "
1598 "user=%s role=%s bounds=%s\n",
ac76c05b
EP		 1599 sym_name(p, SYM_USERS, user->value - 1),
1600 sym_name(p, SYM_ROLES, bit),
1601 sym_name(p, SYM_USERS, upper->value - 1));
d9250dea
KK		 1602
1603 return -EINVAL;
1604 }
1605 }
1606
1607 return 0;
1608}
1609
1610static int role_bounds_sanity_check(void *key, void *datum, void *datap)
1611{
1612 struct role_datum *upper, *role;
1613 struct policydb *p = datap;
1614 int depth = 0;
1615
1616 upper = role = datum;
1617 while (upper->bounds) {
1618 struct ebitmap_node *node;
1619 unsigned long bit;
1620
1621 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1622 printk(KERN_ERR "SELinux: role %s: "
1623 "too deep or looped bounds\n",
1624 (char *) key);
1625 return -EINVAL;
1626 }
1627
1628 upper = p->role_val_to_struct[upper->bounds - 1];
1629 ebitmap_for_each_positive_bit(&role->types, node, bit) {
1630 if (ebitmap_get_bit(&upper->types, bit))
1631 continue;
1632
1633 printk(KERN_ERR
1634 "SELinux: boundary violated policy: "
1635 "role=%s type=%s bounds=%s\n",
ac76c05b
EP		 1636 sym_name(p, SYM_ROLES, role->value - 1),
1637 sym_name(p, SYM_TYPES, bit),
1638 sym_name(p, SYM_ROLES, upper->value - 1));
d9250dea
KK		 1639
1640 return -EINVAL;
1641 }
1642 }
1643
1644 return 0;
1645}
1646
1647static int type_bounds_sanity_check(void *key, void *datum, void *datap)
1648{
daa6d83a 1649 struct type_datum *upper;
d9250dea
KK		 1650 struct policydb *p = datap;
1651 int depth = 0;
1652
daa6d83a 1653 upper = datum;
d9250dea
KK		 1654 while (upper->bounds) {
1655 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1656 printk(KERN_ERR "SELinux: type %s: "
1657 "too deep or looped boundary\n",
1658 (char *) key);
1659 return -EINVAL;
1660 }
1661
23bdecb0
EP		 1662 upper = flex_array_get_ptr(p->type_val_to_struct_array,
1663 upper->bounds - 1);
1664 BUG_ON(!upper);
1665
d9250dea
KK		 1666 if (upper->attribute) {
1667 printk(KERN_ERR "SELinux: type %s: "
1668 "bounded by attribute %s",
1669 (char *) key,
ac76c05b 1670 sym_name(p, SYM_TYPES, upper->value - 1));
d9250dea
KK		 1671 return -EINVAL;
1672 }
1673 }
1674
1675 return 0;
1676}
1677
1678static int policydb_bounds_sanity_check(struct policydb *p)
1679{
1680 int rc;
1681
1682 if (p->policyvers < POLICYDB_VERSION_BOUNDARY)
1683 return 0;
1684
1685 rc = hashtab_map(p->p_users.table,
1686 user_bounds_sanity_check, p);
1687 if (rc)
1688 return rc;
1689
1690 rc = hashtab_map(p->p_roles.table,
1691 role_bounds_sanity_check, p);
1692 if (rc)
1693 return rc;
1694
1695 rc = hashtab_map(p->p_types.table,
1696 type_bounds_sanity_check, p);
1697 if (rc)
1698 return rc;
1699
1700 return 0;
1701}
1702
1da177e4
LT		 1703extern int ss_initialized;
1704
c6d3aaa4
SS		 1705u16 string_to_security_class(struct policydb *p, const char *name)
1706{
1707 struct class_datum *cladatum;
1708
1709 cladatum = hashtab_search(p->p_classes.table, name);
1710 if (!cladatum)
1711 return 0;
1712
1713 return cladatum->value;
1714}
1715
1716u32 string_to_av_perm(struct policydb *p, u16 tclass, const char *name)
1717{
1718 struct class_datum *cladatum;
1719 struct perm_datum *perdatum = NULL;
1720 struct common_datum *comdatum;
1721
1722 if (!tclass || tclass > p->p_classes.nprim)
1723 return 0;
1724
1725 cladatum = p->class_val_to_struct[tclass-1];
1726 comdatum = cladatum->comdatum;
1727 if (comdatum)
1728 perdatum = hashtab_search(comdatum->permissions.table,
1729 name);
1730 if (!perdatum)
1731 perdatum = hashtab_search(cladatum->permissions.table,
1732 name);
1733 if (!perdatum)
1734 return 0;
1735
1736 return 1U << (perdatum->value-1);
1737}
1738
9ee0c823
EP		 1739static int range_read(struct policydb *p, void *fp)
1740{
1741 struct range_trans *rt = NULL;
1742 struct mls_range *r = NULL;
1743 int i, rc;
1744 __le32 buf[2];
1745 u32 nel;
1746
1747 if (p->policyvers < POLICYDB_VERSION_MLS)
1748 return 0;
1749
1750 rc = next_entry(buf, fp, sizeof(u32));
1751 if (rc)
1752 goto out;
1753
1754 nel = le32_to_cpu(buf[0]);
1755 for (i = 0; i < nel; i++) {
1756 rc = -ENOMEM;
1757 rt = kzalloc(sizeof(*rt), GFP_KERNEL);
1758 if (!rt)
1759 goto out;
1760
1761 rc = next_entry(buf, fp, (sizeof(u32) * 2));
1762 if (rc)
1763 goto out;
1764
1765 rt->source_type = le32_to_cpu(buf[0]);
1766 rt->target_type = le32_to_cpu(buf[1]);
1767 if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) {
1768 rc = next_entry(buf, fp, sizeof(u32));
1769 if (rc)
1770 goto out;
1771 rt->target_class = le32_to_cpu(buf[0]);
1772 } else
1773 rt->target_class = p->process_class;
1774
1775 rc = -EINVAL;
1776 if (!policydb_type_isvalid(p, rt->source_type) ||
1777 !policydb_type_isvalid(p, rt->target_type) ||
1778 !policydb_class_isvalid(p, rt->target_class))
1779 goto out;
1780
1781 rc = -ENOMEM;
1782 r = kzalloc(sizeof(*r), GFP_KERNEL);
1783 if (!r)
1784 goto out;
1785
1786 rc = mls_read_range_helper(r, fp);
1787 if (rc)
1788 goto out;
1789
1790 rc = -EINVAL;
1791 if (!mls_range_isvalid(p, r)) {
1792 printk(KERN_WARNING "SELinux: rangetrans: invalid range\n");
1793 goto out;
1794 }
1795
1796 rc = hashtab_insert(p->range_tr, rt, r);
1797 if (rc)
1798 goto out;
1799
1800 rt = NULL;
1801 r = NULL;
1802 }
1803 rangetr_hash_eval(p->range_tr);
1804 rc = 0;
1805out:
1806 kfree(rt);
1807 kfree(r);
1808 return rc;
1809}
1810
652bb9b0
EP		 1811static int filename_trans_read(struct policydb *p, void *fp)
1812{
1813 struct filename_trans *ft, *last;
1814 u32 nel, len;
1815 char *name;
1816 __le32 buf[4];
1817 int rc, i;
1818
1819 if (p->policyvers < POLICYDB_VERSION_FILENAME_TRANS)
1820 return 0;
1821
1822 rc = next_entry(buf, fp, sizeof(u32));
1823 if (rc)
1824 goto out;
1825 nel = le32_to_cpu(buf[0]);
1826
652bb9b0
EP		 1827 last = p->filename_trans;
1828 while (last && last->next)
1829 last = last->next;
1830
1831 for (i = 0; i < nel; i++) {
1832 rc = -ENOMEM;
1833 ft = kzalloc(sizeof(*ft), GFP_KERNEL);
1834 if (!ft)
1835 goto out;
1836
1837 /* add it to the tail of the list */
1838 if (!last)
1839 p->filename_trans = ft;
1840 else
1841 last->next = ft;
1842 last = ft;
1843
1844 /* length of the path component string */
1845 rc = next_entry(buf, fp, sizeof(u32));
1846 if (rc)
1847 goto out;
1848 len = le32_to_cpu(buf[0]);
1849
1850 rc = -ENOMEM;
1851 name = kmalloc(len + 1, GFP_KERNEL);
1852 if (!name)
1853 goto out;
1854
1855 ft->name = name;
1856
1857 /* path component string */
1858 rc = next_entry(name, fp, len);
1859 if (rc)
1860 goto out;
1861 name[len] = 0;
1862
652bb9b0
EP		 1863 rc = next_entry(buf, fp, sizeof(u32) * 4);
1864 if (rc)
1865 goto out;
1866
1867 ft->stype = le32_to_cpu(buf[0]);
1868 ft->ttype = le32_to_cpu(buf[1]);
1869 ft->tclass = le32_to_cpu(buf[2]);
1870 ft->otype = le32_to_cpu(buf[3]);
1871 }
1872 rc = 0;
1873out:
1874 return rc;
1875}
1876
d1b43547
EP		 1877static int genfs_read(struct policydb *p, void *fp)
1878{
1879 int i, j, rc;
1880 u32 nel, nel2, len, len2;
1881 __le32 buf[1];
1882 struct ocontext *l, *c;
1883 struct ocontext *newc = NULL;
1884 struct genfs *genfs_p, *genfs;
1885 struct genfs *newgenfs = NULL;
1886
1887 rc = next_entry(buf, fp, sizeof(u32));
1888 if (rc)
1889 goto out;
1890 nel = le32_to_cpu(buf[0]);
1891
1892 for (i = 0; i < nel; i++) {
1893 rc = next_entry(buf, fp, sizeof(u32));
1894 if (rc)
1895 goto out;
1896 len = le32_to_cpu(buf[0]);
1897
1898 rc = -ENOMEM;
1899 newgenfs = kzalloc(sizeof(*newgenfs), GFP_KERNEL);
1900 if (!newgenfs)
1901 goto out;
1902
1903 rc = -ENOMEM;
1904 newgenfs->fstype = kmalloc(len + 1, GFP_KERNEL);
1905 if (!newgenfs->fstype)
1906 goto out;
1907
1908 rc = next_entry(newgenfs->fstype, fp, len);
1909 if (rc)
1910 goto out;
1911
1912 newgenfs->fstype[len] = 0;
1913
1914 for (genfs_p = NULL, genfs = p->genfs; genfs;
1915 genfs_p = genfs, genfs = genfs->next) {
1916 rc = -EINVAL;
1917 if (strcmp(newgenfs->fstype, genfs->fstype) == 0) {
1918 printk(KERN_ERR "SELinux: dup genfs fstype %s\n",
1919 newgenfs->fstype);
1920 goto out;
1921 }
1922 if (strcmp(newgenfs->fstype, genfs->fstype) < 0)
1923 break;
1924 }
1925 newgenfs->next = genfs;
1926 if (genfs_p)
1927 genfs_p->next = newgenfs;
1928 else
1929 p->genfs = newgenfs;
1930 genfs = newgenfs;
1931 newgenfs = NULL;
1932
1933 rc = next_entry(buf, fp, sizeof(u32));
1934 if (rc)
1935 goto out;
1936
1937 nel2 = le32_to_cpu(buf[0]);
1938 for (j = 0; j < nel2; j++) {
1939 rc = next_entry(buf, fp, sizeof(u32));
1940 if (rc)
1941 goto out;
1942 len = le32_to_cpu(buf[0]);
1943
1944 rc = -ENOMEM;
1945 newc = kzalloc(sizeof(*newc), GFP_KERNEL);
1946 if (!newc)
1947 goto out;
1948
1949 rc = -ENOMEM;
1950 newc->u.name = kmalloc(len + 1, GFP_KERNEL);
1951 if (!newc->u.name)
1952 goto out;
1953
1954 rc = next_entry(newc->u.name, fp, len);
1955 if (rc)
1956 goto out;
1957 newc->u.name[len] = 0;
1958
1959 rc = next_entry(buf, fp, sizeof(u32));
1960 if (rc)
1961 goto out;
1962
1963 newc->v.sclass = le32_to_cpu(buf[0]);
1964 rc = context_read_and_validate(&newc->context[0], p, fp);
1965 if (rc)
1966 goto out;
1967
1968 for (l = NULL, c = genfs->head; c;
1969 l = c, c = c->next) {
1970 rc = -EINVAL;
1971 if (!strcmp(newc->u.name, c->u.name) &&
1972 (!c->v.sclass || !newc->v.sclass ||
1973 newc->v.sclass == c->v.sclass)) {
1974 printk(KERN_ERR "SELinux: dup genfs entry (%s,%s)\n",
1975 genfs->fstype, c->u.name);
1976 goto out;
1977 }
1978 len = strlen(newc->u.name);
1979 len2 = strlen(c->u.name);
1980 if (len > len2)
1981 break;
1982 }
1983
1984 newc->next = c;
1985 if (l)
1986 l->next = newc;
1987 else
1988 genfs->head = newc;
1989 newc = NULL;
1990 }
1991 }
1992 rc = 0;
1993out:
1994 if (newgenfs)
1995 kfree(newgenfs->fstype);
1996 kfree(newgenfs);
1997 ocontext_destroy(newc, OCON_FSUSE);
1998
1999 return rc;
2000}
2001
692a8a23
EP		 2002static int ocontext_read(struct policydb *p, struct policydb_compat_info *info,
2003 void *fp)
2004{
2005 int i, j, rc;
2006 u32 nel, len;
2007 __le32 buf[3];
2008 struct ocontext *l, *c;
2009 u32 nodebuf[8];
2010
2011 for (i = 0; i < info->ocon_num; i++) {
2012 rc = next_entry(buf, fp, sizeof(u32));
2013 if (rc)
2014 goto out;
2015 nel = le32_to_cpu(buf[0]);
2016
2017 l = NULL;
2018 for (j = 0; j < nel; j++) {
2019 rc = -ENOMEM;
2020 c = kzalloc(sizeof(*c), GFP_KERNEL);
2021 if (!c)
2022 goto out;
2023 if (l)
2024 l->next = c;
2025 else
2026 p->ocontexts[i] = c;
2027 l = c;
2028
2029 switch (i) {
2030 case OCON_ISID:
2031 rc = next_entry(buf, fp, sizeof(u32));
2032 if (rc)
2033 goto out;
2034
2035 c->sid[0] = le32_to_cpu(buf[0]);
2036 rc = context_read_and_validate(&c->context[0], p, fp);
2037 if (rc)
2038 goto out;
2039 break;
2040 case OCON_FS:
2041 case OCON_NETIF:
2042 rc = next_entry(buf, fp, sizeof(u32));
2043 if (rc)
2044 goto out;
2045 len = le32_to_cpu(buf[0]);
2046
2047 rc = -ENOMEM;
2048 c->u.name = kmalloc(len + 1, GFP_KERNEL);
2049 if (!c->u.name)
2050 goto out;
2051
2052 rc = next_entry(c->u.name, fp, len);
2053 if (rc)
2054 goto out;
2055
2056 c->u.name[len] = 0;
2057 rc = context_read_and_validate(&c->context[0], p, fp);
2058 if (rc)
2059 goto out;
2060 rc = context_read_and_validate(&c->context[1], p, fp);
2061 if (rc)
2062 goto out;
2063 break;
2064 case OCON_PORT:
2065 rc = next_entry(buf, fp, sizeof(u32)*3);
2066 if (rc)
2067 goto out;
2068 c->u.port.protocol = le32_to_cpu(buf[0]);
2069 c->u.port.low_port = le32_to_cpu(buf[1]);
2070 c->u.port.high_port = le32_to_cpu(buf[2]);
2071 rc = context_read_and_validate(&c->context[0], p, fp);
2072 if (rc)
2073 goto out;
2074 break;
2075 case OCON_NODE:
2076 rc = next_entry(nodebuf, fp, sizeof(u32) * 2);
2077 if (rc)
2078 goto out;
2079 c->u.node.addr = nodebuf[0]; /* network order */
2080 c->u.node.mask = nodebuf[1]; /* network order */
2081 rc = context_read_and_validate(&c->context[0], p, fp);
2082 if (rc)
2083 goto out;
2084 break;
2085 case OCON_FSUSE:
2086 rc = next_entry(buf, fp, sizeof(u32)*2);
2087 if (rc)
2088 goto out;
2089
2090 rc = -EINVAL;
2091 c->v.behavior = le32_to_cpu(buf[0]);
2092 if (c->v.behavior > SECURITY_FS_USE_NONE)
2093 goto out;
2094
2095 rc = -ENOMEM;
2096 len = le32_to_cpu(buf[1]);
2097 c->u.name = kmalloc(len + 1, GFP_KERNEL);
2098 if (!c->u.name)
2099 goto out;
2100
2101 rc = next_entry(c->u.name, fp, len);
2102 if (rc)
2103 goto out;
2104 c->u.name[len] = 0;
2105 rc = context_read_and_validate(&c->context[0], p, fp);
2106 if (rc)
2107 goto out;
2108 break;
2109 case OCON_NODE6: {
2110 int k;
2111
2112 rc = next_entry(nodebuf, fp, sizeof(u32) * 8);
2113 if (rc)
2114 goto out;
2115 for (k = 0; k < 4; k++)
2116 c->u.node6.addr[k] = nodebuf[k];
2117 for (k = 0; k < 4; k++)
2118 c->u.node6.mask[k] = nodebuf[k+4];
2119 rc = context_read_and_validate(&c->context[0], p, fp);
2120 if (rc)
2121 goto out;
2122 break;
2123 }
2124 }
2125 }
2126 }
2127 rc = 0;
2128out:
2129 return rc;
2130}
2131
1da177e4
LT		 2132/*
2133 * Read the configuration data from a policy database binary
2134 * representation file into a policy database structure.
2135 */
2136int policydb_read(struct policydb *p, void *fp)
2137{
2138 struct role_allow *ra, *lra;
2139 struct role_trans *tr, *ltr;
1da177e4 2140 int i, j, rc;
59dbd1ba 2141 __le32 buf[4];
d1b43547
EP		 2142 u32 len, nprim, nel;
2143
1da177e4
LT		 2144 char *policydb_str;
2145 struct policydb_compat_info *info;
1da177e4 2146
1da177e4
LT		 2147 rc = policydb_init(p);
2148 if (rc)
9398c7f7 2149 return rc;
1da177e4
LT		 2150
2151 /* Read the magic number and string length. */
2ced3dfd 2152 rc = next_entry(buf, fp, sizeof(u32) * 2);
9398c7f7 2153 if (rc)
1da177e4
LT		 2154 goto bad;
2155
9398c7f7 2156 rc = -EINVAL;
b5bf6c55 2157 if (le32_to_cpu(buf[0]) != POLICYDB_MAGIC) {
454d972c 2158 printk(KERN_ERR "SELinux: policydb magic number 0x%x does "
1da177e4 2159 "not match expected magic number 0x%x\n",
b5bf6c55 2160 le32_to_cpu(buf[0]), POLICYDB_MAGIC);
1da177e4
LT		 2161 goto bad;
2162 }
2163
9398c7f7 2164 rc = -EINVAL;
b5bf6c55 2165 len = le32_to_cpu(buf[1]);
1da177e4 2166 if (len != strlen(POLICYDB_STRING)) {
454d972c 2167 printk(KERN_ERR "SELinux: policydb string length %d does not "
1da177e4
LT		 2168 "match expected length %Zu\n",
2169 len, strlen(POLICYDB_STRING));
2170 goto bad;
2171 }
9398c7f7
EP		 2172
2173 rc = -ENOMEM;
2ced3dfd 2174 policydb_str = kmalloc(len + 1, GFP_KERNEL);
1da177e4 2175 if (!policydb_str) {
454d972c 2176 printk(KERN_ERR "SELinux: unable to allocate memory for policydb "
1da177e4 2177 "string of length %d\n", len);
1da177e4
LT		 2178 goto bad;
2179 }
9398c7f7 2180
1da177e4 2181 rc = next_entry(policydb_str, fp, len);
9398c7f7 2182 if (rc) {
454d972c 2183 printk(KERN_ERR "SELinux: truncated policydb string identifier\n");
1da177e4
LT		 2184 kfree(policydb_str);
2185 goto bad;
2186 }
9398c7f7
EP		 2187
2188 rc = -EINVAL;
df4ea865 2189 policydb_str[len] = '\0';
1da177e4 2190 if (strcmp(policydb_str, POLICYDB_STRING)) {
454d972c 2191 printk(KERN_ERR "SELinux: policydb string %s does not match "
1da177e4
LT		 2192 "my string %s\n", policydb_str, POLICYDB_STRING);
2193 kfree(policydb_str);
2194 goto bad;
2195 }
2196 /* Done with policydb_str. */
2197 kfree(policydb_str);
2198 policydb_str = NULL;
2199
0719aaf5 2200 /* Read the version and table sizes. */
1da177e4 2201 rc = next_entry(buf, fp, sizeof(u32)*4);
9398c7f7 2202 if (rc)
1da177e4 2203 goto bad;
1da177e4 2204
9398c7f7 2205 rc = -EINVAL;
b5bf6c55 2206 p->policyvers = le32_to_cpu(buf[0]);
1da177e4
LT		 2207 if (p->policyvers < POLICYDB_VERSION_MIN ||
2208 p->policyvers > POLICYDB_VERSION_MAX) {
454d972c 2209 printk(KERN_ERR "SELinux: policydb version %d does not match "
2ced3dfd
EP		 2210 "my version range %d-%d\n",
2211 le32_to_cpu(buf[0]), POLICYDB_VERSION_MIN, POLICYDB_VERSION_MAX);
2212 goto bad;
1da177e4
LT		 2213 }
2214
b5bf6c55 2215 if ((le32_to_cpu(buf[1]) & POLICYDB_CONFIG_MLS)) {
0719aaf5 2216 p->mls_enabled = 1;
1da177e4 2217
9398c7f7 2218 rc = -EINVAL;
1da177e4 2219 if (p->policyvers < POLICYDB_VERSION_MLS) {
744ba35e
EP		 2220 printk(KERN_ERR "SELinux: security policydb version %d "
2221 "(MLS) not backwards compatible\n",
2222 p->policyvers);
1da177e4
LT		 2223 goto bad;
2224 }
1da177e4 2225 }
3f12070e
EP		 2226 p->reject_unknown = !!(le32_to_cpu(buf[1]) & REJECT_UNKNOWN);
2227 p->allow_unknown = !!(le32_to_cpu(buf[1]) & ALLOW_UNKNOWN);
1da177e4 2228
9398c7f7
EP		 2229 if (p->policyvers >= POLICYDB_VERSION_POLCAP) {
2230 rc = ebitmap_read(&p->policycaps, fp);
2231 if (rc)
2232 goto bad;
2233 }
3bb56b25 2234
9398c7f7
EP		 2235 if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE) {
2236 rc = ebitmap_read(&p->permissive_map, fp);
2237 if (rc)
2238 goto bad;
2239 }
64dbf074 2240
9398c7f7 2241 rc = -EINVAL;
1da177e4
LT		 2242 info = policydb_lookup_compat(p->policyvers);
2243 if (!info) {
454d972c 2244 printk(KERN_ERR "SELinux: unable to find policy compat info "
1da177e4
LT		 2245 "for version %d\n", p->policyvers);
2246 goto bad;
2247 }
2248
9398c7f7 2249 rc = -EINVAL;
b5bf6c55
AD		 2250 if (le32_to_cpu(buf[2]) != info->sym_num ||
2251 le32_to_cpu(buf[3]) != info->ocon_num) {
454d972c 2252 printk(KERN_ERR "SELinux: policydb table sizes (%d,%d) do "
b5bf6c55
AD		 2253 "not match mine (%d,%d)\n", le32_to_cpu(buf[2]),
2254 le32_to_cpu(buf[3]),
1da177e4
LT		 2255 info->sym_num, info->ocon_num);
2256 goto bad;
2257 }
2258
2259 for (i = 0; i < info->sym_num; i++) {
2260 rc = next_entry(buf, fp, sizeof(u32)*2);
9398c7f7 2261 if (rc)
1da177e4
LT		 2262 goto bad;
2263 nprim = le32_to_cpu(buf[0]);
2264 nel = le32_to_cpu(buf[1]);
2265 for (j = 0; j < nel; j++) {
2266 rc = read_f[i](p, p->symtab[i].table, fp);
2267 if (rc)
2268 goto bad;
2269 }
2270
2271 p->symtab[i].nprim = nprim;
2272 }
2273
1214eac7
HC		 2274 rc = -EINVAL;
2275 p->process_class = string_to_security_class(p, "process");
2276 if (!p->process_class)
2277 goto bad;
2278
45e5421e 2279 rc = avtab_read(&p->te_avtab, fp, p);
1da177e4
LT		 2280 if (rc)
2281 goto bad;
2282
2283 if (p->policyvers >= POLICYDB_VERSION_BOOL) {
2284 rc = cond_read_list(p, fp);
2285 if (rc)
2286 goto bad;
2287 }
2288
2289 rc = next_entry(buf, fp, sizeof(u32));
9398c7f7 2290 if (rc)
1da177e4
LT		 2291 goto bad;
2292 nel = le32_to_cpu(buf[0]);
2293 ltr = NULL;
2294 for (i = 0; i < nel; i++) {
9398c7f7 2295 rc = -ENOMEM;
89d155ef 2296 tr = kzalloc(sizeof(*tr), GFP_KERNEL);
9398c7f7 2297 if (!tr)
1da177e4 2298 goto bad;
2ced3dfd 2299 if (ltr)
1da177e4 2300 ltr->next = tr;
2ced3dfd 2301 else
1da177e4 2302 p->role_tr = tr;
1da177e4 2303 rc = next_entry(buf, fp, sizeof(u32)*3);
9398c7f7 2304 if (rc)
1da177e4 2305 goto bad;
9398c7f7
EP		 2306
2307 rc = -EINVAL;
1da177e4
LT		 2308 tr->role = le32_to_cpu(buf[0]);
2309 tr->type = le32_to_cpu(buf[1]);
2310 tr->new_role = le32_to_cpu(buf[2]);
8023976c
HC		 2311 if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) {
2312 rc = next_entry(buf, fp, sizeof(u32));
2313 if (rc)
2314 goto bad;
2315 tr->tclass = le32_to_cpu(buf[0]);
2316 } else
2317 tr->tclass = p->process_class;
2318
45e5421e
SS		 2319 if (!policydb_role_isvalid(p, tr->role) ||
2320 !policydb_type_isvalid(p, tr->type) ||
8023976c 2321 !policydb_class_isvalid(p, tr->tclass) ||
9398c7f7 2322 !policydb_role_isvalid(p, tr->new_role))
45e5421e 2323 goto bad;
1da177e4
LT		 2324 ltr = tr;
2325 }
2326
2327 rc = next_entry(buf, fp, sizeof(u32));
9398c7f7 2328 if (rc)
1da177e4
LT		 2329 goto bad;
2330 nel = le32_to_cpu(buf[0]);
2331 lra = NULL;
2332 for (i = 0; i < nel; i++) {
9398c7f7 2333 rc = -ENOMEM;
89d155ef 2334 ra = kzalloc(sizeof(*ra), GFP_KERNEL);
9398c7f7 2335 if (!ra)
1da177e4 2336 goto bad;
2ced3dfd 2337 if (lra)
1da177e4 2338 lra->next = ra;
2ced3dfd 2339 else
1da177e4 2340 p->role_allow = ra;
1da177e4 2341 rc = next_entry(buf, fp, sizeof(u32)*2);
9398c7f7 2342 if (rc)
1da177e4 2343 goto bad;
9398c7f7
EP		 2344
2345 rc = -EINVAL;
1da177e4
LT		 2346 ra->role = le32_to_cpu(buf[0]);
2347 ra->new_role = le32_to_cpu(buf[1]);
45e5421e 2348 if (!policydb_role_isvalid(p, ra->role) ||
9398c7f7 2349 !policydb_role_isvalid(p, ra->new_role))
45e5421e 2350 goto bad;
1da177e4
LT		 2351 lra = ra;
2352 }
2353
652bb9b0
EP		 2354 rc = filename_trans_read(p, fp);
2355 if (rc)
2356 goto bad;
2357
1d9bc6dc 2358 rc = policydb_index(p);
1da177e4
LT		 2359 if (rc)
2360 goto bad;
2361
9398c7f7
EP		 2362 rc = -EINVAL;
2363 p->process_trans_perms = string_to_av_perm(p, p->process_class, "transition");
2364 p->process_trans_perms |= string_to_av_perm(p, p->process_class, "dyntransition");
c6d3aaa4
SS		 2365 if (!p->process_trans_perms)
2366 goto bad;
2367
692a8a23
EP		 2368 rc = ocontext_read(p, info, fp);
2369 if (rc)
2370 goto bad;
1da177e4 2371
d1b43547
EP		 2372 rc = genfs_read(p, fp);
2373 if (rc)
1da177e4 2374 goto bad;
1da177e4 2375
9ee0c823
EP		 2376 rc = range_read(p, fp);
2377 if (rc)
2378 goto bad;
1da177e4 2379
6371dcd3
EP		 2380 rc = -ENOMEM;
2381 p->type_attr_map_array = flex_array_alloc(sizeof(struct ebitmap),
2382 p->p_types.nprim,
2383 GFP_KERNEL | __GFP_ZERO);
2384 if (!p->type_attr_map_array)
2385 goto bad;
2386
2387 /* preallocate so we don't have to worry about the put ever failing */
2388 rc = flex_array_prealloc(p->type_attr_map_array, 0, p->p_types.nprim - 1,
2389 GFP_KERNEL | __GFP_ZERO);
2390 if (rc)
782ebb99
SS		 2391 goto bad;
2392
2393 for (i = 0; i < p->p_types.nprim; i++) {
6371dcd3
EP		 2394 struct ebitmap *e = flex_array_get(p->type_attr_map_array, i);
2395
2396 BUG_ON(!e);
2397 ebitmap_init(e);
782ebb99 2398 if (p->policyvers >= POLICYDB_VERSION_AVTAB) {
6371dcd3
EP		 2399 rc = ebitmap_read(e, fp);
2400 if (rc)
782ebb99
SS		 2401 goto bad;
2402 }
2403 /* add the type itself as the degenerate case */
6371dcd3
EP		 2404 rc = ebitmap_set_bit(e, i, 1);
2405 if (rc)
2406 goto bad;
782ebb99
SS		 2407 }
2408
d9250dea
KK		 2409 rc = policydb_bounds_sanity_check(p);
2410 if (rc)
2411 goto bad;
2412
1da177e4
LT		 2413 rc = 0;
2414out:
2415 return rc;
1da177e4 2416bad:
1da177e4
LT		 2417 policydb_destroy(p);
2418 goto out;
2419}
cee74f47
EP		 2420
2421/*
2422 * Write a MLS level structure to a policydb binary
2423 * representation file.
2424 */
2425static int mls_write_level(struct mls_level *l, void *fp)
2426{
2427 __le32 buf[1];
2428 int rc;
2429
2430 buf[0] = cpu_to_le32(l->sens);
2431 rc = put_entry(buf, sizeof(u32), 1, fp);
2432 if (rc)
2433 return rc;
2434
2435 rc = ebitmap_write(&l->cat, fp);
2436 if (rc)
2437 return rc;
2438
2439 return 0;
2440}
2441
2442/*
2443 * Write a MLS range structure to a policydb binary
2444 * representation file.
2445 */
2446static int mls_write_range_helper(struct mls_range *r, void *fp)
2447{
2448 __le32 buf[3];
2449 size_t items;
2450 int rc, eq;
2451
2452 eq = mls_level_eq(&r->level[1], &r->level[0]);
2453
2454 if (eq)
2455 items = 2;
2456 else
2457 items = 3;
2458 buf[0] = cpu_to_le32(items-1);
2459 buf[1] = cpu_to_le32(r->level[0].sens);
2460 if (!eq)
2461 buf[2] = cpu_to_le32(r->level[1].sens);
2462
2463 BUG_ON(items > (sizeof(buf)/sizeof(buf[0])));
2464
2465 rc = put_entry(buf, sizeof(u32), items, fp);
2466 if (rc)
2467 return rc;
2468
2469 rc = ebitmap_write(&r->level[0].cat, fp);
2470 if (rc)
2471 return rc;
2472 if (!eq) {
2473 rc = ebitmap_write(&r->level[1].cat, fp);
2474 if (rc)
2475 return rc;
2476 }
2477
2478 return 0;
2479}
2480
2481static int sens_write(void *vkey, void *datum, void *ptr)
2482{
2483 char *key = vkey;
2484 struct level_datum *levdatum = datum;
2485 struct policy_data *pd = ptr;
2486 void *fp = pd->fp;
2487 __le32 buf[2];
2488 size_t len;
2489 int rc;
2490
2491 len = strlen(key);
2492 buf[0] = cpu_to_le32(len);
2493 buf[1] = cpu_to_le32(levdatum->isalias);
2494 rc = put_entry(buf, sizeof(u32), 2, fp);
2495 if (rc)
2496 return rc;
2497
2498 rc = put_entry(key, 1, len, fp);
2499 if (rc)
2500 return rc;
2501
2502 rc = mls_write_level(levdatum->level, fp);
2503 if (rc)
2504 return rc;
2505
2506 return 0;
2507}
2508
2509static int cat_write(void *vkey, void *datum, void *ptr)
2510{
2511 char *key = vkey;
2512 struct cat_datum *catdatum = datum;
2513 struct policy_data *pd = ptr;
2514 void *fp = pd->fp;
2515 __le32 buf[3];
2516 size_t len;
2517 int rc;
2518
2519 len = strlen(key);
2520 buf[0] = cpu_to_le32(len);
2521 buf[1] = cpu_to_le32(catdatum->value);
2522 buf[2] = cpu_to_le32(catdatum->isalias);
2523 rc = put_entry(buf, sizeof(u32), 3, fp);
2524 if (rc)
2525 return rc;
2526
2527 rc = put_entry(key, 1, len, fp);
2528 if (rc)
2529 return rc;
2530
2531 return 0;
2532}
2533
c900ff32 2534static int role_trans_write(struct policydb *p, void *fp)
cee74f47 2535{
c900ff32 2536 struct role_trans *r = p->role_tr;
cee74f47
EP		 2537 struct role_trans *tr;
2538 u32 buf[3];
2539 size_t nel;
2540 int rc;
2541
2542 nel = 0;
2543 for (tr = r; tr; tr = tr->next)
2544 nel++;
2545 buf[0] = cpu_to_le32(nel);
2546 rc = put_entry(buf, sizeof(u32), 1, fp);
2547 if (rc)
2548 return rc;
2549 for (tr = r; tr; tr = tr->next) {
2550 buf[0] = cpu_to_le32(tr->role);
2551 buf[1] = cpu_to_le32(tr->type);
2552 buf[2] = cpu_to_le32(tr->new_role);
2553 rc = put_entry(buf, sizeof(u32), 3, fp);
2554 if (rc)
2555 return rc;
c900ff32
HC		 2556 if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) {
2557 buf[0] = cpu_to_le32(tr->tclass);
2558 rc = put_entry(buf, sizeof(u32), 1, fp);
2559 if (rc)
2560 return rc;
2561 }
cee74f47
EP		 2562 }
2563
2564 return 0;
2565}
2566
2567static int role_allow_write(struct role_allow *r, void *fp)
2568{
2569 struct role_allow *ra;
2570 u32 buf[2];
2571 size_t nel;
2572 int rc;
2573
2574 nel = 0;
2575 for (ra = r; ra; ra = ra->next)
2576 nel++;
2577 buf[0] = cpu_to_le32(nel);
2578 rc = put_entry(buf, sizeof(u32), 1, fp);
2579 if (rc)
2580 return rc;
2581 for (ra = r; ra; ra = ra->next) {
2582 buf[0] = cpu_to_le32(ra->role);
2583 buf[1] = cpu_to_le32(ra->new_role);
2584 rc = put_entry(buf, sizeof(u32), 2, fp);
2585 if (rc)
2586 return rc;
2587 }
2588 return 0;
2589}
2590
2591/*
2592 * Write a security context structure
2593 * to a policydb binary representation file.
2594 */
2595static int context_write(struct policydb *p, struct context *c,
2596 void *fp)
2597{
2598 int rc;
2599 __le32 buf[3];
2600
2601 buf[0] = cpu_to_le32(c->user);
2602 buf[1] = cpu_to_le32(c->role);
2603 buf[2] = cpu_to_le32(c->type);
2604
2605 rc = put_entry(buf, sizeof(u32), 3, fp);
2606 if (rc)
2607 return rc;
2608
2609 rc = mls_write_range_helper(&c->range, fp);
2610 if (rc)
2611 return rc;
2612
2613 return 0;
2614}
2615
2616/*
2617 * The following *_write functions are used to
2618 * write the symbol data to a policy database
2619 * binary representation file.
2620 */
2621
2622static int perm_write(void *vkey, void *datum, void *fp)
2623{
2624 char *key = vkey;
2625 struct perm_datum *perdatum = datum;
2626 __le32 buf[2];
2627 size_t len;
2628 int rc;
2629
2630 len = strlen(key);
2631 buf[0] = cpu_to_le32(len);
2632 buf[1] = cpu_to_le32(perdatum->value);
2633 rc = put_entry(buf, sizeof(u32), 2, fp);
2634 if (rc)
2635 return rc;
2636
2637 rc = put_entry(key, 1, len, fp);
2638 if (rc)
2639 return rc;
2640
2641 return 0;
2642}
2643
2644static int common_write(void *vkey, void *datum, void *ptr)
2645{
2646 char *key = vkey;
2647 struct common_datum *comdatum = datum;
2648 struct policy_data *pd = ptr;
2649 void *fp = pd->fp;
2650 __le32 buf[4];
2651 size_t len;
2652 int rc;
2653
2654 len = strlen(key);
2655 buf[0] = cpu_to_le32(len);
2656 buf[1] = cpu_to_le32(comdatum->value);
2657 buf[2] = cpu_to_le32(comdatum->permissions.nprim);
2658 buf[3] = cpu_to_le32(comdatum->permissions.table->nel);
2659 rc = put_entry(buf, sizeof(u32), 4, fp);
2660 if (rc)
2661 return rc;
2662
2663 rc = put_entry(key, 1, len, fp);
2664 if (rc)
2665 return rc;
2666
2667 rc = hashtab_map(comdatum->permissions.table, perm_write, fp);
2668 if (rc)
2669 return rc;
2670
2671 return 0;
2672}
2673
2674static int write_cons_helper(struct policydb *p, struct constraint_node *node,
2675 void *fp)
2676{
2677 struct constraint_node *c;
2678 struct constraint_expr *e;
2679 __le32 buf[3];
2680 u32 nel;
2681 int rc;
2682
2683 for (c = node; c; c = c->next) {
2684 nel = 0;
2685 for (e = c->expr; e; e = e->next)
2686 nel++;
2687 buf[0] = cpu_to_le32(c->permissions);
2688 buf[1] = cpu_to_le32(nel);
2689 rc = put_entry(buf, sizeof(u32), 2, fp);
2690 if (rc)
2691 return rc;
2692 for (e = c->expr; e; e = e->next) {
2693 buf[0] = cpu_to_le32(e->expr_type);
2694 buf[1] = cpu_to_le32(e->attr);
2695 buf[2] = cpu_to_le32(e->op);
2696 rc = put_entry(buf, sizeof(u32), 3, fp);
2697 if (rc)
2698 return rc;
2699
2700 switch (e->expr_type) {
2701 case CEXPR_NAMES:
2702 rc = ebitmap_write(&e->names, fp);
2703 if (rc)
2704 return rc;
2705 break;
2706 default:
2707 break;
2708 }
2709 }
2710 }
2711
2712 return 0;
2713}
2714
2715static int class_write(void *vkey, void *datum, void *ptr)
2716{
2717 char *key = vkey;
2718 struct class_datum *cladatum = datum;
2719 struct policy_data *pd = ptr;
2720 void *fp = pd->fp;
2721 struct policydb *p = pd->p;
2722 struct constraint_node *c;
2723 __le32 buf[6];
2724 u32 ncons;
2725 size_t len, len2;
2726 int rc;
2727
2728 len = strlen(key);
2729 if (cladatum->comkey)
2730 len2 = strlen(cladatum->comkey);
2731 else
2732 len2 = 0;
2733
2734 ncons = 0;
2735 for (c = cladatum->constraints; c; c = c->next)
2736 ncons++;
2737
2738 buf[0] = cpu_to_le32(len);
2739 buf[1] = cpu_to_le32(len2);
2740 buf[2] = cpu_to_le32(cladatum->value);
2741 buf[3] = cpu_to_le32(cladatum->permissions.nprim);
2742 if (cladatum->permissions.table)
2743 buf[4] = cpu_to_le32(cladatum->permissions.table->nel);
2744 else
2745 buf[4] = 0;
2746 buf[5] = cpu_to_le32(ncons);
2747 rc = put_entry(buf, sizeof(u32), 6, fp);
2748 if (rc)
2749 return rc;
2750
2751 rc = put_entry(key, 1, len, fp);
2752 if (rc)
2753 return rc;
2754
2755 if (cladatum->comkey) {
2756 rc = put_entry(cladatum->comkey, 1, len2, fp);
2757 if (rc)
2758 return rc;
2759 }
2760
2761 rc = hashtab_map(cladatum->permissions.table, perm_write, fp);
2762 if (rc)
2763 return rc;
2764
2765 rc = write_cons_helper(p, cladatum->constraints, fp);
2766 if (rc)
2767 return rc;
2768
2769 /* write out the validatetrans rule */
2770 ncons = 0;
2771 for (c = cladatum->validatetrans; c; c = c->next)
2772 ncons++;
2773
2774 buf[0] = cpu_to_le32(ncons);
2775 rc = put_entry(buf, sizeof(u32), 1, fp);
2776 if (rc)
2777 return rc;
2778
2779 rc = write_cons_helper(p, cladatum->validatetrans, fp);
2780 if (rc)
2781 return rc;
2782
2783 return 0;
2784}
2785
2786static int role_write(void *vkey, void *datum, void *ptr)
2787{
2788 char *key = vkey;
2789 struct role_datum *role = datum;
2790 struct policy_data *pd = ptr;
2791 void *fp = pd->fp;
2792 struct policydb *p = pd->p;
2793 __le32 buf[3];
2794 size_t items, len;
2795 int rc;
2796
2797 len = strlen(key);
2798 items = 0;
2799 buf[items++] = cpu_to_le32(len);
2800 buf[items++] = cpu_to_le32(role->value);
2801 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
2802 buf[items++] = cpu_to_le32(role->bounds);
2803
2804 BUG_ON(items > (sizeof(buf)/sizeof(buf[0])));
2805
2806 rc = put_entry(buf, sizeof(u32), items, fp);
2807 if (rc)
2808 return rc;
2809
2810 rc = put_entry(key, 1, len, fp);
2811 if (rc)
2812 return rc;
2813
2814 rc = ebitmap_write(&role->dominates, fp);
2815 if (rc)
2816 return rc;
2817
2818 rc = ebitmap_write(&role->types, fp);
2819 if (rc)
2820 return rc;
2821
2822 return 0;
2823}
2824
2825static int type_write(void *vkey, void *datum, void *ptr)
2826{
2827 char *key = vkey;
2828 struct type_datum *typdatum = datum;
2829 struct policy_data *pd = ptr;
2830 struct policydb *p = pd->p;
2831 void *fp = pd->fp;
2832 __le32 buf[4];
2833 int rc;
2834 size_t items, len;
2835
2836 len = strlen(key);
2837 items = 0;
2838 buf[items++] = cpu_to_le32(len);
2839 buf[items++] = cpu_to_le32(typdatum->value);
2840 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) {
2841 u32 properties = 0;
2842
2843 if (typdatum->primary)
2844 properties |= TYPEDATUM_PROPERTY_PRIMARY;
2845
2846 if (typdatum->attribute)
2847 properties |= TYPEDATUM_PROPERTY_ATTRIBUTE;
2848
2849 buf[items++] = cpu_to_le32(properties);
2850 buf[items++] = cpu_to_le32(typdatum->bounds);
2851 } else {
2852 buf[items++] = cpu_to_le32(typdatum->primary);
2853 }
2854 BUG_ON(items > (sizeof(buf) / sizeof(buf[0])));
2855 rc = put_entry(buf, sizeof(u32), items, fp);
2856 if (rc)
2857 return rc;
2858
2859 rc = put_entry(key, 1, len, fp);
2860 if (rc)
2861 return rc;
2862
2863 return 0;
2864}
2865
2866static int user_write(void *vkey, void *datum, void *ptr)
2867{
2868 char *key = vkey;
2869 struct user_datum *usrdatum = datum;
2870 struct policy_data *pd = ptr;
2871 struct policydb *p = pd->p;
2872 void *fp = pd->fp;
2873 __le32 buf[3];
2874 size_t items, len;
2875 int rc;
2876
2877 len = strlen(key);
2878 items = 0;
2879 buf[items++] = cpu_to_le32(len);
2880 buf[items++] = cpu_to_le32(usrdatum->value);
2881 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
2882 buf[items++] = cpu_to_le32(usrdatum->bounds);
2883 BUG_ON(items > (sizeof(buf) / sizeof(buf[0])));
2884 rc = put_entry(buf, sizeof(u32), items, fp);
2885 if (rc)
2886 return rc;
2887
2888 rc = put_entry(key, 1, len, fp);
2889 if (rc)
2890 return rc;
2891
2892 rc = ebitmap_write(&usrdatum->roles, fp);
2893 if (rc)
2894 return rc;
2895
2896 rc = mls_write_range_helper(&usrdatum->range, fp);
2897 if (rc)
2898 return rc;
2899
2900 rc = mls_write_level(&usrdatum->dfltlevel, fp);
2901 if (rc)
2902 return rc;
2903
2904 return 0;
2905}
2906
2907static int (*write_f[SYM_NUM]) (void *key, void *datum,
2908 void *datap) =
2909{
2910 common_write,
2911 class_write,
2912 role_write,
2913 type_write,
2914 user_write,
2915 cond_write_bool,
2916 sens_write,
2917 cat_write,
2918};
2919
2920static int ocontext_write(struct policydb *p, struct policydb_compat_info *info,
2921 void *fp)
2922{
2923 unsigned int i, j, rc;
2924 size_t nel, len;
2925 __le32 buf[3];
2926 u32 nodebuf[8];
2927 struct ocontext *c;
2928 for (i = 0; i < info->ocon_num; i++) {
2929 nel = 0;
2930 for (c = p->ocontexts[i]; c; c = c->next)
2931 nel++;
2932 buf[0] = cpu_to_le32(nel);
2933 rc = put_entry(buf, sizeof(u32), 1, fp);
2934 if (rc)
2935 return rc;
2936 for (c = p->ocontexts[i]; c; c = c->next) {
2937 switch (i) {
2938 case OCON_ISID:
2939 buf[0] = cpu_to_le32(c->sid[0]);
2940 rc = put_entry(buf, sizeof(u32), 1, fp);
2941 if (rc)
2942 return rc;
2943 rc = context_write(p, &c->context[0], fp);
2944 if (rc)
2945 return rc;
2946 break;
2947 case OCON_FS:
2948 case OCON_NETIF:
2949 len = strlen(c->u.name);
2950 buf[0] = cpu_to_le32(len);
2951 rc = put_entry(buf, sizeof(u32), 1, fp);
2952 if (rc)
2953 return rc;
2954 rc = put_entry(c->u.name, 1, len, fp);
2955 if (rc)
2956 return rc;
2957 rc = context_write(p, &c->context[0], fp);
2958 if (rc)
2959 return rc;
2960 rc = context_write(p, &c->context[1], fp);
2961 if (rc)
2962 return rc;
2963 break;
2964 case OCON_PORT:
2965 buf[0] = cpu_to_le32(c->u.port.protocol);
2966 buf[1] = cpu_to_le32(c->u.port.low_port);
2967 buf[2] = cpu_to_le32(c->u.port.high_port);
2968 rc = put_entry(buf, sizeof(u32), 3, fp);
2969 if (rc)
2970 return rc;
2971 rc = context_write(p, &c->context[0], fp);
2972 if (rc)
2973 return rc;
2974 break;
2975 case OCON_NODE:
2976 nodebuf[0] = c->u.node.addr; /* network order */
2977 nodebuf[1] = c->u.node.mask; /* network order */
2978 rc = put_entry(nodebuf, sizeof(u32), 2, fp);
2979 if (rc)
2980 return rc;
2981 rc = context_write(p, &c->context[0], fp);
2982 if (rc)
2983 return rc;
2984 break;
2985 case OCON_FSUSE:
2986 buf[0] = cpu_to_le32(c->v.behavior);
2987 len = strlen(c->u.name);
2988 buf[1] = cpu_to_le32(len);
2989 rc = put_entry(buf, sizeof(u32), 2, fp);
2990 if (rc)
2991 return rc;
2992 rc = put_entry(c->u.name, 1, len, fp);
2993 if (rc)
2994 return rc;
2995 rc = context_write(p, &c->context[0], fp);
2996 if (rc)
2997 return rc;
2998 break;
2999 case OCON_NODE6:
3000 for (j = 0; j < 4; j++)
3001 nodebuf[j] = c->u.node6.addr[j]; /* network order */
3002 for (j = 0; j < 4; j++)
3003 nodebuf[j + 4] = c->u.node6.mask[j]; /* network order */
3004 rc = put_entry(nodebuf, sizeof(u32), 8, fp);
3005 if (rc)
3006 return rc;
3007 rc = context_write(p, &c->context[0], fp);
3008 if (rc)
3009 return rc;
3010 break;
3011 }
3012 }
3013 }
3014 return 0;
3015}
3016
3017static int genfs_write(struct policydb *p, void *fp)
3018{
3019 struct genfs *genfs;
3020 struct ocontext *c;
3021 size_t len;
3022 __le32 buf[1];
3023 int rc;
3024
3025 len = 0;
3026 for (genfs = p->genfs; genfs; genfs = genfs->next)
3027 len++;
3028 buf[0] = cpu_to_le32(len);
3029 rc = put_entry(buf, sizeof(u32), 1, fp);
3030 if (rc)
3031 return rc;
3032 for (genfs = p->genfs; genfs; genfs = genfs->next) {
3033 len = strlen(genfs->fstype);
3034 buf[0] = cpu_to_le32(len);
3035 rc = put_entry(buf, sizeof(u32), 1, fp);
3036 if (rc)
3037 return rc;
3038 rc = put_entry(genfs->fstype, 1, len, fp);
3039 if (rc)
3040 return rc;
3041 len = 0;
3042 for (c = genfs->head; c; c = c->next)
3043 len++;
3044 buf[0] = cpu_to_le32(len);
3045 rc = put_entry(buf, sizeof(u32), 1, fp);
3046 if (rc)
3047 return rc;
3048 for (c = genfs->head; c; c = c->next) {
3049 len = strlen(c->u.name);
3050 buf[0] = cpu_to_le32(len);
3051 rc = put_entry(buf, sizeof(u32), 1, fp);
3052 if (rc)
3053 return rc;
3054 rc = put_entry(c->u.name, 1, len, fp);
3055 if (rc)
3056 return rc;
3057 buf[0] = cpu_to_le32(c->v.sclass);
3058 rc = put_entry(buf, sizeof(u32), 1, fp);
3059 if (rc)
3060 return rc;
3061 rc = context_write(p, &c->context[0], fp);
3062 if (rc)
3063 return rc;
3064 }
3065 }
3066 return 0;
3067}
3068
3069static int range_count(void *key, void *data, void *ptr)
3070{
3071 int *cnt = ptr;
3072 *cnt = *cnt + 1;
3073
3074 return 0;
3075}
3076
3077static int range_write_helper(void *key, void *data, void *ptr)
3078{
3079 __le32 buf[2];
3080 struct range_trans *rt = key;
3081 struct mls_range *r = data;
3082 struct policy_data *pd = ptr;
3083 void *fp = pd->fp;
3084 struct policydb *p = pd->p;
3085 int rc;
3086
3087 buf[0] = cpu_to_le32(rt->source_type);
3088 buf[1] = cpu_to_le32(rt->target_type);
3089 rc = put_entry(buf, sizeof(u32), 2, fp);
3090 if (rc)
3091 return rc;
3092 if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) {
3093 buf[0] = cpu_to_le32(rt->target_class);
3094 rc = put_entry(buf, sizeof(u32), 1, fp);
3095 if (rc)
3096 return rc;
3097 }
3098 rc = mls_write_range_helper(r, fp);
3099 if (rc)
3100 return rc;
3101
3102 return 0;
3103}
3104
3105static int range_write(struct policydb *p, void *fp)
3106{
3107 size_t nel;
3108 __le32 buf[1];
3109 int rc;
3110 struct policy_data pd;
3111
3112 pd.p = p;
3113 pd.fp = fp;
3114
3115 /* count the number of entries in the hashtab */
3116 nel = 0;
3117 rc = hashtab_map(p->range_tr, range_count, &nel);
3118 if (rc)
3119 return rc;
3120
3121 buf[0] = cpu_to_le32(nel);
3122 rc = put_entry(buf, sizeof(u32), 1, fp);
3123 if (rc)
3124 return rc;
3125
3126 /* actually write all of the entries */
3127 rc = hashtab_map(p->range_tr, range_write_helper, &pd);
3128 if (rc)
3129 return rc;
3130
3131 return 0;
3132}
3133
652bb9b0
EP		 3134static int filename_trans_write(struct policydb *p, void *fp)
3135{
3136 struct filename_trans *ft;
3137 u32 len, nel = 0;
3138 __le32 buf[4];
3139 int rc;
3140
3141 for (ft = p->filename_trans; ft; ft = ft->next)
3142 nel++;
3143
3144 buf[0] = cpu_to_le32(nel);
3145 rc = put_entry(buf, sizeof(u32), 1, fp);
3146 if (rc)
3147 return rc;
3148
3149 for (ft = p->filename_trans; ft; ft = ft->next) {
3150 len = strlen(ft->name);
3151 buf[0] = cpu_to_le32(len);
3152 rc = put_entry(buf, sizeof(u32), 1, fp);
3153 if (rc)
3154 return rc;
3155
3156 rc = put_entry(ft->name, sizeof(char), len, fp);
3157 if (rc)
3158 return rc;
3159
3160 buf[0] = ft->stype;
3161 buf[1] = ft->ttype;
3162 buf[2] = ft->tclass;
3163 buf[3] = ft->otype;
3164
3165 rc = put_entry(buf, sizeof(u32), 4, fp);
3166 if (rc)
3167 return rc;
3168 }
3169 return 0;
3170}
cee74f47
EP		 3171/*
3172 * Write the configuration data in a policy database
3173 * structure to a policy database binary representation
3174 * file.
3175 */
3176int policydb_write(struct policydb *p, void *fp)
3177{
3178 unsigned int i, num_syms;
3179 int rc;
3180 __le32 buf[4];
3181 u32 config;
3182 size_t len;
3183 struct policydb_compat_info *info;
3184
3185 /*
3186 * refuse to write policy older than compressed avtab
3187 * to simplify the writer. There are other tests dropped
3188 * since we assume this throughout the writer code. Be
3189 * careful if you ever try to remove this restriction
3190 */
3191 if (p->policyvers < POLICYDB_VERSION_AVTAB) {
3192 printk(KERN_ERR "SELinux: refusing to write policy version %d."
3193 " Because it is less than version %d\n", p->policyvers,
3194 POLICYDB_VERSION_AVTAB);
3195 return -EINVAL;
3196 }
3197
3198 config = 0;
3199 if (p->mls_enabled)
3200 config |= POLICYDB_CONFIG_MLS;
3201
3202 if (p->reject_unknown)
3203 config |= REJECT_UNKNOWN;
3204 if (p->allow_unknown)
3205 config |= ALLOW_UNKNOWN;
3206
3207 /* Write the magic number and string identifiers. */
3208 buf[0] = cpu_to_le32(POLICYDB_MAGIC);
3209 len = strlen(POLICYDB_STRING);
3210 buf[1] = cpu_to_le32(len);
3211 rc = put_entry(buf, sizeof(u32), 2, fp);
3212 if (rc)
3213 return rc;
3214 rc = put_entry(POLICYDB_STRING, 1, len, fp);
3215 if (rc)
3216 return rc;
3217
3218 /* Write the version, config, and table sizes. */
3219 info = policydb_lookup_compat(p->policyvers);
3220 if (!info) {
3221 printk(KERN_ERR "SELinux: compatibility lookup failed for policy "
3222 "version %d", p->policyvers);
9398c7f7 3223 return -EINVAL;
cee74f47
EP		 3224 }
3225
3226 buf[0] = cpu_to_le32(p->policyvers);
3227 buf[1] = cpu_to_le32(config);
3228 buf[2] = cpu_to_le32(info->sym_num);
3229 buf[3] = cpu_to_le32(info->ocon_num);
3230
3231 rc = put_entry(buf, sizeof(u32), 4, fp);
3232 if (rc)
3233 return rc;
3234
3235 if (p->policyvers >= POLICYDB_VERSION_POLCAP) {
3236 rc = ebitmap_write(&p->policycaps, fp);
3237 if (rc)
3238 return rc;
3239 }
3240
3241 if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE) {
3242 rc = ebitmap_write(&p->permissive_map, fp);
3243 if (rc)
3244 return rc;
3245 }
3246
3247 num_syms = info->sym_num;
3248 for (i = 0; i < num_syms; i++) {
3249 struct policy_data pd;
3250
3251 pd.fp = fp;
3252 pd.p = p;
3253
3254 buf[0] = cpu_to_le32(p->symtab[i].nprim);
3255 buf[1] = cpu_to_le32(p->symtab[i].table->nel);
3256
3257 rc = put_entry(buf, sizeof(u32), 2, fp);
3258 if (rc)
3259 return rc;
3260 rc = hashtab_map(p->symtab[i].table, write_f[i], &pd);
3261 if (rc)
3262 return rc;
3263 }
3264
3265 rc = avtab_write(p, &p->te_avtab, fp);
3266 if (rc)
3267 return rc;
3268
3269 rc = cond_write_list(p, p->cond_list, fp);
3270 if (rc)
3271 return rc;
3272
c900ff32 3273 rc = role_trans_write(p, fp);
cee74f47
EP		 3274 if (rc)
3275 return rc;
3276
3277 rc = role_allow_write(p->role_allow, fp);
3278 if (rc)
3279 return rc;
3280
652bb9b0
EP		 3281 rc = filename_trans_write(p, fp);
3282 if (rc)
3283 return rc;
3284
cee74f47
EP		 3285 rc = ocontext_write(p, info, fp);
3286 if (rc)
3287 return rc;
3288
3289 rc = genfs_write(p, fp);
3290 if (rc)
3291 return rc;
3292
3293 rc = range_write(p, fp);
3294 if (rc)
3295 return rc;
3296
3297 for (i = 0; i < p->p_types.nprim; i++) {
3298 struct ebitmap *e = flex_array_get(p->type_attr_map_array, i);
3299
3300 BUG_ON(!e);
3301 rc = ebitmap_write(e, fp);
3302 if (rc)
3303 return rc;
3304 }
3305
3306 return 0;
3307}
kernel source for telekom puls (alcatel/mediatek)