security/selinux/ss/policydb.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Implementation of the policy database.
   4  *
   5  * Author : Stephen Smalley, <[email protected]>
   6  */
   7
   8 /*
   9  * Updated: Trusted Computer Solutions, Inc. <[email protected]>
  10  *
  11  *      Support for enhanced MLS infrastructure.
  12  *
  13  * Updated: Frank Mayer <[email protected]> and Karl MacMillan <[email protected]>
  14  *
  15  *      Added conditional policy language extensions
  16  *
  17  * Updated: Hewlett-Packard <[email protected]>
  18  *
  19  *      Added support for the policy capability bitmap
  20  *
  21  * Update: Mellanox Techonologies
  22  *
  23  *      Added Infiniband support
  24  *
  25  * Copyright (C) 2016 Mellanox Techonologies
  26  * Copyright (C) 2007 Hewlett-Packard Development Company, L.P.
  27  * Copyright (C) 2004-2005 Trusted Computer Solutions, Inc.
  28  * Copyright (C) 2003 - 2004 Tresys Technology, LLC
  29  */
  30
  31 #include <linux/kernel.h>
  32 #include <linux/sched.h>
  33 #include <linux/slab.h>
  34 #include <linux/string.h>
  35 #include <linux/errno.h>
  36 #include <linux/audit.h>
  37 #include "security.h"
  38
  39 #include "policydb.h"
  40 #include "conditional.h"
  41 #include "mls.h"
  42 #include "services.h"
  43
  44 #ifdef DEBUG_HASHES
  45 static const char *symtab_name[SYM_NUM] = {
  46         "common prefixes",
  47         "classes",
  48         "roles",
  49         "types",
  50         "users",
  51         "bools",
  52         "levels",
  53         "categories",
  54 };
  55 #endif
  56
  57 struct policydb_compat_info {
  58         int version;
  59         int sym_num;
  60         int ocon_num;
  61 };
  62
  63 /* These need to be updated if SYM_NUM or OCON_NUM changes */
  64 static const struct policydb_compat_info policydb_compat[] = {
  65         {
  66                 .version        = POLICYDB_VERSION_BASE,
  67                 .sym_num        = SYM_NUM - 3,
  68                 .ocon_num       = OCON_NUM - 3,
  69         },
  70         {
  71                 .version        = POLICYDB_VERSION_BOOL,
  72                 .sym_num        = SYM_NUM - 2,
  73                 .ocon_num       = OCON_NUM - 3,
  74         },
  75         {
  76                 .version        = POLICYDB_VERSION_IPV6,
  77                 .sym_num        = SYM_NUM - 2,
  78                 .ocon_num       = OCON_NUM - 2,
  79         },
  80         {
  81                 .version        = POLICYDB_VERSION_NLCLASS,
  82                 .sym_num        = SYM_NUM - 2,
  83                 .ocon_num       = OCON_NUM - 2,
  84         },
  85         {
  86                 .version        = POLICYDB_VERSION_MLS,
  87                 .sym_num        = SYM_NUM,
  88                 .ocon_num       = OCON_NUM - 2,
  89         },
  90         {
  91                 .version        = POLICYDB_VERSION_AVTAB,
  92                 .sym_num        = SYM_NUM,
  93                 .ocon_num       = OCON_NUM - 2,
  94         },
  95         {
  96                 .version        = POLICYDB_VERSION_RANGETRANS,
  97                 .sym_num        = SYM_NUM,
  98                 .ocon_num       = OCON_NUM - 2,
  99         },
 100         {
 101                 .version        = POLICYDB_VERSION_POLCAP,
 102                 .sym_num        = SYM_NUM,
 103                 .ocon_num       = OCON_NUM - 2,
 104         },
 105         {
 106                 .version        = POLICYDB_VERSION_PERMISSIVE,
 107                 .sym_num        = SYM_NUM,
 108                 .ocon_num       = OCON_NUM - 2,
 109         },
 110         {
 111                 .version        = POLICYDB_VERSION_BOUNDARY,
 112                 .sym_num        = SYM_NUM,
 113                 .ocon_num       = OCON_NUM - 2,
 114         },
 115         {
 116                 .version        = POLICYDB_VERSION_FILENAME_TRANS,
 117                 .sym_num        = SYM_NUM,
 118                 .ocon_num       = OCON_NUM - 2,
 119         },
 120         {
 121                 .version        = POLICYDB_VERSION_ROLETRANS,
 122                 .sym_num        = SYM_NUM,
 123                 .ocon_num       = OCON_NUM - 2,
 124         },
 125         {
 126                 .version        = POLICYDB_VERSION_NEW_OBJECT_DEFAULTS,
 127                 .sym_num        = SYM_NUM,
 128                 .ocon_num       = OCON_NUM - 2,
 129         },
 130         {
 131                 .version        = POLICYDB_VERSION_DEFAULT_TYPE,
 132                 .sym_num        = SYM_NUM,
 133                 .ocon_num       = OCON_NUM - 2,
 134         },
 135         {
 136                 .version        = POLICYDB_VERSION_CONSTRAINT_NAMES,
 137                 .sym_num        = SYM_NUM,
 138                 .ocon_num       = OCON_NUM - 2,
 139         },
 140         {
 141                 .version        = POLICYDB_VERSION_XPERMS_IOCTL,
 142                 .sym_num        = SYM_NUM,
 143                 .ocon_num       = OCON_NUM - 2,
 144         },
 145         {
 146                 .version        = POLICYDB_VERSION_INFINIBAND,
 147                 .sym_num        = SYM_NUM,
 148                 .ocon_num       = OCON_NUM,
 149         },
 150         {
 151                 .version        = POLICYDB_VERSION_GLBLUB,
 152                 .sym_num        = SYM_NUM,
 153                 .ocon_num       = OCON_NUM,
 154         },
 155         {
 156                 .version        = POLICYDB_VERSION_COMP_FTRANS,
 157                 .sym_num        = SYM_NUM,
 158                 .ocon_num       = OCON_NUM,
 159         },
 160 };
 161
 162 static const struct policydb_compat_info *policydb_lookup_compat(int version)
 163 {
 164         int i;
 165
 166         for (i = 0; i < ARRAY_SIZE(policydb_compat); i++) {
 167                 if (policydb_compat[i].version == version)
 168                         return &policydb_compat[i];
 169         }
 170
 171         return NULL;
 172 }
 173
 174 /*
 175  * The following *_destroy functions are used to
 176  * free any memory allocated for each kind of
 177  * symbol data in the policy database.
 178  */
 179
 180 static int perm_destroy(void *key, void *datum, void *p)
 181 {
 182         kfree(key);
 183         kfree(datum);
 184         return 0;
 185 }
 186
 187 static int common_destroy(void *key, void *datum, void *p)
 188 {
 189         struct common_datum *comdatum;
 190
 191         kfree(key);
 192         if (datum) {
 193                 comdatum = datum;
 194                 hashtab_map(&comdatum->permissions.table, perm_destroy, NULL);
 195                 hashtab_destroy(&comdatum->permissions.table);
 196         }
 197         kfree(datum);
 198         return 0;
 199 }
 200
 201 static void constraint_expr_destroy(struct constraint_expr *expr)
 202 {
 203         if (expr) {
 204                 ebitmap_destroy(&expr->names);
 205                 if (expr->type_names) {
 206                         ebitmap_destroy(&expr->type_names->types);
 207                         ebitmap_destroy(&expr->type_names->negset);
 208                         kfree(expr->type_names);
 209                 }
 210                 kfree(expr);
 211         }
 212 }
 213
 214 static int cls_destroy(void *key, void *datum, void *p)
 215 {
 216         struct class_datum *cladatum;
 217         struct constraint_node *constraint, *ctemp;
 218         struct constraint_expr *e, *etmp;
 219
 220         kfree(key);
 221         if (datum) {
 222                 cladatum = datum;
 223                 hashtab_map(&cladatum->permissions.table, perm_destroy, NULL);
 224                 hashtab_destroy(&cladatum->permissions.table);
 225                 constraint = cladatum->constraints;
 226                 while (constraint) {
 227                         e = constraint->expr;
 228                         while (e) {
 229                                 etmp = e;
 230                                 e = e->next;
 231                                 constraint_expr_destroy(etmp);
 232                         }
 233                         ctemp = constraint;
 234                         constraint = constraint->next;
 235                         kfree(ctemp);
 236                 }
 237
 238                 constraint = cladatum->validatetrans;
 239                 while (constraint) {
 240                         e = constraint->expr;
 241                         while (e) {
 242                                 etmp = e;
 243                                 e = e->next;
 244                                 constraint_expr_destroy(etmp);
 245                         }
 246                         ctemp = constraint;
 247                         constraint = constraint->next;
 248                         kfree(ctemp);
 249                 }
 250                 kfree(cladatum->comkey);
 251         }
 252         kfree(datum);
 253         return 0;
 254 }
 255
 256 static int role_destroy(void *key, void *datum, void *p)
 257 {
 258         struct role_datum *role;
 259
 260         kfree(key);
 261         if (datum) {
 262                 role = datum;
 263                 ebitmap_destroy(&role->dominates);
 264                 ebitmap_destroy(&role->types);
 265         }
 266         kfree(datum);
 267         return 0;
 268 }
 269
 270 static int type_destroy(void *key, void *datum, void *p)
 271 {
 272         kfree(key);
 273         kfree(datum);
 274         return 0;
 275 }
 276
 277 static int user_destroy(void *key, void *datum, void *p)
 278 {
 279         struct user_datum *usrdatum;
 280
 281         kfree(key);
 282         if (datum) {
 283                 usrdatum = datum;
 284                 ebitmap_destroy(&usrdatum->roles);
 285                 ebitmap_destroy(&usrdatum->range.level[0].cat);
 286                 ebitmap_destroy(&usrdatum->range.level[1].cat);
 287                 ebitmap_destroy(&usrdatum->dfltlevel.cat);
 288         }
 289         kfree(datum);
 290         return 0;
 291 }
 292
 293 static int sens_destroy(void *key, void *datum, void *p)
 294 {
 295         struct level_datum *levdatum;
 296
 297         kfree(key);
 298         if (datum) {
 299                 levdatum = datum;
 300                 if (levdatum->level)
 301                         ebitmap_destroy(&levdatum->level->cat);
 302                 kfree(levdatum->level);
 303         }
 304         kfree(datum);
 305         return 0;
 306 }
 307
 308 static int cat_destroy(void *key, void *datum, void *p)
 309 {
 310         kfree(key);
 311         kfree(datum);
 312         return 0;
 313 }
 314
 315 static int (*const destroy_f[SYM_NUM]) (void *key, void *datum, void *datap) = {
 316         common_destroy,
 317         cls_destroy,
 318         role_destroy,
 319         type_destroy,
 320         user_destroy,
 321         cond_destroy_bool,
 322         sens_destroy,
 323         cat_destroy,
 324 };
 325
 326 static int filenametr_destroy(void *key, void *datum, void *p)
 327 {
 328         struct filename_trans_key *ft = key;
 329         struct filename_trans_datum *next, *d = datum;
 330
 331         kfree(ft->name);
 332         kfree(key);
 333         do {
 334                 ebitmap_destroy(&d->stypes);
 335                 next = d->next;
 336                 kfree(d);
 337                 d = next;
 338         } while (unlikely(d));
 339         cond_resched();
 340         return 0;
 341 }
 342
 343 static int range_tr_destroy(void *key, void *datum, void *p)
 344 {
 345         struct mls_range *rt = datum;
 346
 347         kfree(key);
 348         ebitmap_destroy(&rt->level[0].cat);
 349         ebitmap_destroy(&rt->level[1].cat);
 350         kfree(datum);
 351         cond_resched();
 352         return 0;
 353 }
 354
 355 static int role_tr_destroy(void *key, void *datum, void *p)
 356 {
 357         kfree(key);
 358         kfree(datum);
 359         return 0;
 360 }
 361
 362 static void ocontext_destroy(struct ocontext *c, int i)
 363 {
 364         if (!c)
 365                 return;
 366
 367         context_destroy(&c->context[0]);
 368         context_destroy(&c->context[1]);
 369         if (i == OCON_ISID || i == OCON_FS ||
 370             i == OCON_NETIF || i == OCON_FSUSE)
 371                 kfree(c->u.name);
 372         kfree(c);
 373 }
 374
 375 /*
 376  * Initialize the role table.
 377  */
 378 static int roles_init(struct policydb *p)
 379 {
 380         char *key = NULL;
 381         int rc;
 382         struct role_datum *role;
 383
 384         role = kzalloc(sizeof(*role), GFP_KERNEL);
 385         if (!role)
 386                 return -ENOMEM;
 387
 388         rc = -EINVAL;
 389         role->value = ++p->p_roles.nprim;
 390         if (role->value != OBJECT_R_VAL)
 391                 goto out;
 392
 393         rc = -ENOMEM;
 394         key = kstrdup(OBJECT_R, GFP_KERNEL);
 395         if (!key)
 396                 goto out;
 397
 398         rc = symtab_insert(&p->p_roles, key, role);
 399         if (rc)
 400                 goto out;
 401
 402         return 0;
 403 out:
 404         kfree(key);
 405         kfree(role);
 406         return rc;
 407 }
 408
 409 static u32 filenametr_hash(const void *k)
 410 {
 411         const struct filename_trans_key *ft = k;
 412         unsigned long hash;
 413         unsigned int byte_num;
 414         unsigned char focus;
 415
 416         hash = ft->ttype ^ ft->tclass;
 417
 418         byte_num = 0;
 419         while ((focus = ft->name[byte_num++]))
 420                 hash = partial_name_hash(focus, hash);
 421         return hash;
 422 }
 423
 424 static int filenametr_cmp(const void *k1, const void *k2)
 425 {
 426         const struct filename_trans_key *ft1 = k1;
 427         const struct filename_trans_key *ft2 = k2;
 428         int v;
 429
 430         v = ft1->ttype - ft2->ttype;
 431         if (v)
 432                 return v;
 433
 434         v = ft1->tclass - ft2->tclass;
 435         if (v)
 436                 return v;
 437
 438         return strcmp(ft1->name, ft2->name);
 439
 440 }
 441
 442 static const struct hashtab_key_params filenametr_key_params = {
 443         .hash = filenametr_hash,
 444         .cmp = filenametr_cmp,
 445 };
 446
 447 struct filename_trans_datum *policydb_filenametr_search(
 448         struct policydb *p, struct filename_trans_key *key)
 449 {
 450         return hashtab_search(&p->filename_trans, key, filenametr_key_params);
 451 }
 452
 453 static u32 rangetr_hash(const void *k)
 454 {
 455         const struct range_trans *key = k;
 456
 457         return key->source_type + (key->target_type << 3) +
 458                 (key->target_class << 5);
 459 }
 460
 461 static int rangetr_cmp(const void *k1, const void *k2)
 462 {
 463         const struct range_trans *key1 = k1, *key2 = k2;
 464         int v;
 465
 466         v = key1->source_type - key2->source_type;
 467         if (v)
 468                 return v;
 469
 470         v = key1->target_type - key2->target_type;
 471         if (v)
 472                 return v;
 473
 474         v = key1->target_class - key2->target_class;
 475
 476         return v;
 477 }
 478
 479 static const struct hashtab_key_params rangetr_key_params = {
 480         .hash = rangetr_hash,
 481         .cmp = rangetr_cmp,
 482 };
 483
 484 struct mls_range *policydb_rangetr_search(struct policydb *p,
 485                                           struct range_trans *key)
 486 {
 487         return hashtab_search(&p->range_tr, key, rangetr_key_params);
 488 }
 489
 490 static u32 role_trans_hash(const void *k)
 491 {
 492         const struct role_trans_key *key = k;
 493
 494         return key->role + (key->type << 3) + (key->tclass << 5);
 495 }
 496
 497 static int role_trans_cmp(const void *k1, const void *k2)
 498 {
 499         const struct role_trans_key *key1 = k1, *key2 = k2;
 500         int v;
 501
 502         v = key1->role - key2->role;
 503         if (v)
 504                 return v;
 505
 506         v = key1->type - key2->type;
 507         if (v)
 508                 return v;
 509
 510         return key1->tclass - key2->tclass;
 511 }
 512
 513 static const struct hashtab_key_params roletr_key_params = {
 514         .hash = role_trans_hash,
 515         .cmp = role_trans_cmp,
 516 };
 517
 518 struct role_trans_datum *policydb_roletr_search(struct policydb *p,
 519                                                 struct role_trans_key *key)
 520 {
 521         return hashtab_search(&p->role_tr, key, roletr_key_params);
 522 }
 523
 524 /*
 525  * Initialize a policy database structure.
 526  */
 527 static void policydb_init(struct policydb *p)
 528 {
 529         memset(p, 0, sizeof(*p));
 530
 531         avtab_init(&p->te_avtab);
 532         cond_policydb_init(p);
 533
 534         ebitmap_init(&p->filename_trans_ttypes);
 535         ebitmap_init(&p->policycaps);
 536         ebitmap_init(&p->permissive_map);
 537 }
 538
 539 /*
 540  * The following *_index functions are used to
 541  * define the val_to_name and val_to_struct arrays
 542  * in a policy database structure.  The val_to_name
 543  * arrays are used when converting security context
 544  * structures into string representations.  The
 545  * val_to_struct arrays are used when the attributes
 546  * of a class, role, or user are needed.
 547  */
 548
 549 static int common_index(void *key, void *datum, void *datap)
 550 {
 551         struct policydb *p;
 552         struct common_datum *comdatum;
 553
 554         comdatum = datum;
 555         p = datap;
 556         if (!comdatum->value || comdatum->value > p->p_commons.nprim)
 557                 return -EINVAL;
 558
 559         p->sym_val_to_name[SYM_COMMONS][comdatum->value - 1] = key;
 560
 561         return 0;
 562 }
 563
 564 static int class_index(void *key, void *datum, void *datap)
 565 {
 566         struct policydb *p;
 567         struct class_datum *cladatum;
 568
 569         cladatum = datum;
 570         p = datap;
 571         if (!cladatum->value || cladatum->value > p->p_classes.nprim)
 572                 return -EINVAL;
 573
 574         p->sym_val_to_name[SYM_CLASSES][cladatum->value - 1] = key;
 575         p->class_val_to_struct[cladatum->value - 1] = cladatum;
 576         return 0;
 577 }
 578
 579 static int role_index(void *key, void *datum, void *datap)
 580 {
 581         struct policydb *p;
 582         struct role_datum *role;
 583
 584         role = datum;
 585         p = datap;
 586         if (!role->value
 587             || role->value > p->p_roles.nprim
 588             || role->bounds > p->p_roles.nprim)
 589                 return -EINVAL;
 590
 591         p->sym_val_to_name[SYM_ROLES][role->value - 1] = key;
 592         p->role_val_to_struct[role->value - 1] = role;
 593         return 0;
 594 }
 595
 596 static int type_index(void *key, void *datum, void *datap)
 597 {
 598         struct policydb *p;
 599         struct type_datum *typdatum;
 600
 601         typdatum = datum;
 602         p = datap;
 603
 604         if (typdatum->primary) {
 605                 if (!typdatum->value
 606                     || typdatum->value > p->p_types.nprim
 607                     || typdatum->bounds > p->p_types.nprim)
 608                         return -EINVAL;
 609                 p->sym_val_to_name[SYM_TYPES][typdatum->value - 1] = key;
 610                 p->type_val_to_struct[typdatum->value - 1] = typdatum;
 611         }
 612
 613         return 0;
 614 }
 615
 616 static int user_index(void *key, void *datum, void *datap)
 617 {
 618         struct policydb *p;
 619         struct user_datum *usrdatum;
 620
 621         usrdatum = datum;
 622         p = datap;
 623         if (!usrdatum->value
 624             || usrdatum->value > p->p_users.nprim
 625             || usrdatum->bounds > p->p_users.nprim)
 626                 return -EINVAL;
 627
 628         p->sym_val_to_name[SYM_USERS][usrdatum->value - 1] = key;
 629         p->user_val_to_struct[usrdatum->value - 1] = usrdatum;
 630         return 0;
 631 }
 632
 633 static int sens_index(void *key, void *datum, void *datap)
 634 {
 635         struct policydb *p;
 636         struct level_datum *levdatum;
 637
 638         levdatum = datum;
 639         p = datap;
 640
 641         if (!levdatum->isalias) {
 642                 if (!levdatum->level->sens ||
 643                     levdatum->level->sens > p->p_levels.nprim)
 644                         return -EINVAL;
 645
 646                 p->sym_val_to_name[SYM_LEVELS][levdatum->level->sens - 1] = key;
 647         }
 648
 649         return 0;
 650 }
 651
 652 static int cat_index(void *key, void *datum, void *datap)
 653 {
 654         struct policydb *p;
 655         struct cat_datum *catdatum;
 656
 657         catdatum = datum;
 658         p = datap;
 659
 660         if (!catdatum->isalias) {
 661                 if (!catdatum->value || catdatum->value > p->p_cats.nprim)
 662                         return -EINVAL;
 663
 664                 p->sym_val_to_name[SYM_CATS][catdatum->value - 1] = key;
 665         }
 666
 667         return 0;
 668 }
 669
 670 static int (*const index_f[SYM_NUM]) (void *key, void *datum, void *datap) = {
 671         common_index,
 672         class_index,
 673         role_index,
 674         type_index,
 675         user_index,
 676         cond_index_bool,
 677         sens_index,
 678         cat_index,
 679 };
 680
 681 #ifdef DEBUG_HASHES
 682 static void hash_eval(struct hashtab *h, const char *hash_name)
 683 {
 684         struct hashtab_info info;
 685
 686         hashtab_stat(h, &info);
 687         pr_debug("SELinux: %s:  %d entries and %d/%d buckets used, longest chain length %d\n",
 688                  hash_name, h->nel, info.slots_used, h->size,
 689                  info.max_chain_len);
 690 }
 691
 692 static void symtab_hash_eval(struct symtab *s)
 693 {
 694         int i;
 695
 696         for (i = 0; i < SYM_NUM; i++)
 697                 hash_eval(&s[i].table, symtab_name[i]);
 698 }
 699
 700 #else
 701 static inline void hash_eval(struct hashtab *h, const char *hash_name)
 702 {
 703 }
 704 #endif
 705
 706 /*
 707  * Define the other val_to_name and val_to_struct arrays
 708  * in a policy database structure.
 709  *
 710  * Caller must clean up on failure.
 711  */
 712 static int policydb_index(struct policydb *p)
 713 {
 714         int i, rc;
 715
 716         if (p->mls_enabled)
 717                 pr_debug("SELinux:  %d users, %d roles, %d types, %d bools, %d sens, %d cats\n",
 718                          p->p_users.nprim, p->p_roles.nprim, p->p_types.nprim,
 719                          p->p_bools.nprim, p->p_levels.nprim, p->p_cats.nprim);
 720         else
 721                 pr_debug("SELinux:  %d users, %d roles, %d types, %d bools\n",
 722                          p->p_users.nprim, p->p_roles.nprim, p->p_types.nprim,
 723                          p->p_bools.nprim);
 724
 725         pr_debug("SELinux:  %d classes, %d rules\n",
 726                  p->p_classes.nprim, p->te_avtab.nel);
 727
 728 #ifdef DEBUG_HASHES
 729         avtab_hash_eval(&p->te_avtab, "rules");
 730         symtab_hash_eval(p->symtab);
 731 #endif
 732
 733         p->class_val_to_struct = kcalloc(p->p_classes.nprim,
 734                                          sizeof(*p->class_val_to_struct),
 735                                          GFP_KERNEL);
 736         if (!p->class_val_to_struct)
 737                 return -ENOMEM;
 738
 739         p->role_val_to_struct = kcalloc(p->p_roles.nprim,
 740                                         sizeof(*p->role_val_to_struct),
 741                                         GFP_KERNEL);
 742         if (!p->role_val_to_struct)
 743                 return -ENOMEM;
 744
 745         p->user_val_to_struct = kcalloc(p->p_users.nprim,
 746                                         sizeof(*p->user_val_to_struct),
 747                                         GFP_KERNEL);
 748         if (!p->user_val_to_struct)
 749                 return -ENOMEM;
 750
 751         p->type_val_to_struct = kvcalloc(p->p_types.nprim,
 752                                          sizeof(*p->type_val_to_struct),
 753                                          GFP_KERNEL);
 754         if (!p->type_val_to_struct)
 755                 return -ENOMEM;
 756
 757         rc = cond_init_bool_indexes(p);
 758         if (rc)
 759                 goto out;
 760
 761         for (i = 0; i < SYM_NUM; i++) {
 762                 p->sym_val_to_name[i] = kvcalloc(p->symtab[i].nprim,
 763                                                  sizeof(char *),
 764                                                  GFP_KERNEL);
 765                 if (!p->sym_val_to_name[i])
 766                         return -ENOMEM;
 767
 768                 rc = hashtab_map(&p->symtab[i].table, index_f[i], p);
 769                 if (rc)
 770                         goto out;
 771         }
 772         rc = 0;
 773 out:
 774         return rc;
 775 }
 776
 777 /*
 778  * Free any memory allocated by a policy database structure.
 779  */
 780 void policydb_destroy(struct policydb *p)
 781 {
 782         struct ocontext *c, *ctmp;
 783         struct genfs *g, *gtmp;
 784         int i;
 785         struct role_allow *ra, *lra = NULL;
 786
 787         for (i = 0; i < SYM_NUM; i++) {
 788                 cond_resched();
 789                 hashtab_map(&p->symtab[i].table, destroy_f[i], NULL);
 790                 hashtab_destroy(&p->symtab[i].table);
 791         }
 792
 793         for (i = 0; i < SYM_NUM; i++)
 794                 kvfree(p->sym_val_to_name[i]);
 795
 796         kfree(p->class_val_to_struct);
 797         kfree(p->role_val_to_struct);
 798         kfree(p->user_val_to_struct);
 799         kvfree(p->type_val_to_struct);
 800
 801         avtab_destroy(&p->te_avtab);
 802
 803         for (i = 0; i < OCON_NUM; i++) {
 804                 cond_resched();
 805                 c = p->ocontexts[i];
 806                 while (c) {
 807                         ctmp = c;
 808                         c = c->next;
 809                         ocontext_destroy(ctmp, i);
 810                 }
 811                 p->ocontexts[i] = NULL;
 812         }
 813
 814         g = p->genfs;
 815         while (g) {
 816                 cond_resched();
 817                 kfree(g->fstype);
 818                 c = g->head;
 819                 while (c) {
 820                         ctmp = c;
 821                         c = c->next;
 822                         ocontext_destroy(ctmp, OCON_FSUSE);
 823                 }
 824                 gtmp = g;
 825                 g = g->next;
 826                 kfree(gtmp);
 827         }
 828         p->genfs = NULL;
 829
 830         cond_policydb_destroy(p);
 831
 832         hashtab_map(&p->role_tr, role_tr_destroy, NULL);
 833         hashtab_destroy(&p->role_tr);
 834
 835         for (ra = p->role_allow; ra; ra = ra->next) {
 836                 cond_resched();
 837                 kfree(lra);
 838                 lra = ra;
 839         }
 840         kfree(lra);
 841
 842         hashtab_map(&p->filename_trans, filenametr_destroy, NULL);
 843         hashtab_destroy(&p->filename_trans);
 844
 845         hashtab_map(&p->range_tr, range_tr_destroy, NULL);
 846         hashtab_destroy(&p->range_tr);
 847
 848         if (p->type_attr_map_array) {
 849                 for (i = 0; i < p->p_types.nprim; i++)
 850                         ebitmap_destroy(&p->type_attr_map_array[i]);
 851                 kvfree(p->type_attr_map_array);
 852         }
 853
 854         ebitmap_destroy(&p->filename_trans_ttypes);
 855         ebitmap_destroy(&p->policycaps);
 856         ebitmap_destroy(&p->permissive_map);
 857 }
 858
 859 /*
 860  * Load the initial SIDs specified in a policy database
 861  * structure into a SID table.
 862  */
 863 int policydb_load_isids(struct policydb *p, struct sidtab *s)
 864 {
 865         struct ocontext *head, *c;
 866         int rc;
 867
 868         rc = sidtab_init(s);
 869         if (rc) {
 870                 pr_err("SELinux:  out of memory on SID table init\n");
 871                 return rc;
 872         }
 873
 874         head = p->ocontexts[OCON_ISID];
 875         for (c = head; c; c = c->next) {
 876                 u32 sid = c->sid[0];
 877                 const char *name = security_get_initial_sid_context(sid);
 878
 879                 if (sid == SECSID_NULL) {
 880                         pr_err("SELinux:  SID 0 was assigned a context.\n");
 881                         sidtab_destroy(s);
 882                         return -EINVAL;
 883                 }
 884
 885                 /* Ignore initial SIDs unused by this kernel. */
 886                 if (!name)
 887                         continue;
 888
 889                 rc = sidtab_set_initial(s, sid, &c->context[0]);
 890                 if (rc) {
 891                         pr_err("SELinux:  unable to load initial SID %s.\n",
 892                                name);
 893                         sidtab_destroy(s);
 894                         return rc;
 895                 }
 896         }
 897         return 0;
 898 }
 899
 900 int policydb_class_isvalid(struct policydb *p, unsigned int class)
 901 {
 902         if (!class || class > p->p_classes.nprim)
 903                 return 0;
 904         return 1;
 905 }
 906
 907 int policydb_role_isvalid(struct policydb *p, unsigned int role)
 908 {
 909         if (!role || role > p->p_roles.nprim)
 910                 return 0;
 911         return 1;
 912 }
 913
 914 int policydb_type_isvalid(struct policydb *p, unsigned int type)
 915 {
 916         if (!type || type > p->p_types.nprim)
 917                 return 0;
 918         return 1;
 919 }
 920
 921 /*
 922  * Return 1 if the fields in the security context
 923  * structure `c' are valid.  Return 0 otherwise.
 924  */
 925 int policydb_context_isvalid(struct policydb *p, struct context *c)
 926 {
 927         struct role_datum *role;
 928         struct user_datum *usrdatum;
 929
 930         if (!c->role || c->role > p->p_roles.nprim)
 931                 return 0;
 932
 933         if (!c->user || c->user > p->p_users.nprim)
 934                 return 0;
 935
 936         if (!c->type || c->type > p->p_types.nprim)
 937                 return 0;
 938
 939         if (c->role != OBJECT_R_VAL) {
 940                 /*
 941                  * Role must be authorized for the type.
 942                  */
 943                 role = p->role_val_to_struct[c->role - 1];
 944                 if (!role || !ebitmap_get_bit(&role->types, c->type - 1))
 945                         /* role may not be associated with type */
 946                         return 0;
 947
 948                 /*
 949                  * User must be authorized for the role.
 950                  */
 951                 usrdatum = p->user_val_to_struct[c->user - 1];
 952                 if (!usrdatum)
 953                         return 0;
 954
 955                 if (!ebitmap_get_bit(&usrdatum->roles, c->role - 1))
 956                         /* user may not be associated with role */
 957                         return 0;
 958         }
 959
 960         if (!mls_context_isvalid(p, c))
 961                 return 0;
 962
 963         return 1;
 964 }
 965
 966 /*
 967  * Read a MLS range structure from a policydb binary
 968  * representation file.
 969  */
 970 static int mls_read_range_helper(struct mls_range *r, void *fp)
 971 {
 972         __le32 buf[2];
 973         u32 items;
 974         int rc;
 975
 976         rc = next_entry(buf, fp, sizeof(u32));
 977         if (rc)
 978                 goto out;
 979
 980         rc = -EINVAL;
 981         items = le32_to_cpu(buf[0]);
 982         if (items > ARRAY_SIZE(buf)) {
 983                 pr_err("SELinux: mls:  range overflow\n");
 984                 goto out;
 985         }
 986
 987         rc = next_entry(buf, fp, sizeof(u32) * items);
 988         if (rc) {
 989                 pr_err("SELinux: mls:  truncated range\n");
 990                 goto out;
 991         }
 992
 993         r->level[0].sens = le32_to_cpu(buf[0]);
 994         if (items > 1)
 995                 r->level[1].sens = le32_to_cpu(buf[1]);
 996         else
 997                 r->level[1].sens = r->level[0].sens;
 998
 999         rc = ebitmap_read(&r->level[0].cat, fp);
1000         if (rc) {
1001                 pr_err("SELinux: mls:  error reading low categories\n");
1002                 goto out;
1003         }
1004         if (items > 1) {
1005                 rc = ebitmap_read(&r->level[1].cat, fp);
1006                 if (rc) {
1007                         pr_err("SELinux: mls:  error reading high categories\n");
1008                         goto bad_high;
1009                 }
1010         } else {
1011                 rc = ebitmap_cpy(&r->level[1].cat, &r->level[0].cat);
1012                 if (rc) {
1013                         pr_err("SELinux: mls:  out of memory\n");
1014                         goto bad_high;
1015                 }
1016         }
1017
1018         return 0;
1019 bad_high:
1020         ebitmap_destroy(&r->level[0].cat);
1021 out:
1022         return rc;
1023 }
1024
1025 /*
1026  * Read and validate a security context structure
1027  * from a policydb binary representation file.
1028  */
1029 static int context_read_and_validate(struct context *c,
1030                                      struct policydb *p,
1031                                      void *fp)
1032 {
1033         __le32 buf[3];
1034         int rc;
1035
1036         rc = next_entry(buf, fp, sizeof buf);
1037         if (rc) {
1038                 pr_err("SELinux: context truncated\n");
1039                 goto out;
1040         }
1041         c->user = le32_to_cpu(buf[0]);
1042         c->role = le32_to_cpu(buf[1]);
1043         c->type = le32_to_cpu(buf[2]);
1044         if (p->policyvers >= POLICYDB_VERSION_MLS) {
1045                 rc = mls_read_range_helper(&c->range, fp);
1046                 if (rc) {
1047                         pr_err("SELinux: error reading MLS range of context\n");
1048                         goto out;
1049                 }
1050         }
1051
1052         rc = -EINVAL;
1053         if (!policydb_context_isvalid(p, c)) {
1054                 pr_err("SELinux:  invalid security context\n");
1055                 context_destroy(c);
1056                 goto out;
1057         }
1058         rc = 0;
1059 out:
1060         return rc;
1061 }
1062
1063 /*
1064  * The following *_read functions are used to
1065  * read the symbol data from a policy database
1066  * binary representation file.
1067  */
1068
1069 static int str_read(char **strp, gfp_t flags, void *fp, u32 len)
1070 {
1071         int rc;
1072         char *str;
1073
1074         if ((len == 0) || (len == (u32)-1))
1075                 return -EINVAL;
1076
1077         str = kmalloc(len + 1, flags | __GFP_NOWARN);
1078         if (!str)
1079                 return -ENOMEM;
1080
1081         rc = next_entry(str, fp, len);
1082         if (rc) {
1083                 kfree(str);
1084                 return rc;
1085         }
1086
1087         str[len] = '\0';
1088         *strp = str;
1089         return 0;
1090 }
1091
1092 static int perm_read(struct policydb *p, struct symtab *s, void *fp)
1093 {
1094         char *key = NULL;
1095         struct perm_datum *perdatum;
1096         int rc;
1097         __le32 buf[2];
1098         u32 len;
1099
1100         perdatum = kzalloc(sizeof(*perdatum), GFP_KERNEL);
1101         if (!perdatum)
1102                 return -ENOMEM;
1103
1104         rc = next_entry(buf, fp, sizeof buf);
1105         if (rc)
1106                 goto bad;
1107
1108         len = le32_to_cpu(buf[0]);
1109         perdatum->value = le32_to_cpu(buf[1]);
1110
1111         rc = str_read(&key, GFP_KERNEL, fp, len);
1112         if (rc)
1113                 goto bad;
1114
1115         rc = symtab_insert(s, key, perdatum);
1116         if (rc)
1117                 goto bad;
1118
1119         return 0;
1120 bad:
1121         perm_destroy(key, perdatum, NULL);
1122         return rc;
1123 }
1124
1125 static int common_read(struct policydb *p, struct symtab *s, void *fp)
1126 {
1127         char *key = NULL;
1128         struct common_datum *comdatum;
1129         __le32 buf[4];
1130         u32 len, nel;
1131         int i, rc;
1132
1133         comdatum = kzalloc(sizeof(*comdatum), GFP_KERNEL);
1134         if (!comdatum)
1135                 return -ENOMEM;
1136
1137         rc = next_entry(buf, fp, sizeof buf);
1138         if (rc)
1139                 goto bad;
1140
1141         len = le32_to_cpu(buf[0]);
1142         comdatum->value = le32_to_cpu(buf[1]);
1143         nel = le32_to_cpu(buf[3]);
1144
1145         rc = symtab_init(&comdatum->permissions, nel);
1146         if (rc)
1147                 goto bad;
1148         comdatum->permissions.nprim = le32_to_cpu(buf[2]);
1149
1150         rc = str_read(&key, GFP_KERNEL, fp, len);
1151         if (rc)
1152                 goto bad;
1153
1154         for (i = 0; i < nel; i++) {
1155                 rc = perm_read(p, &comdatum->permissions, fp);
1156                 if (rc)
1157                         goto bad;
1158         }
1159
1160         rc = symtab_insert(s, key, comdatum);
1161         if (rc)
1162                 goto bad;
1163         return 0;
1164 bad:
1165         common_destroy(key, comdatum, NULL);
1166         return rc;
1167 }
1168
1169 static void type_set_init(struct type_set *t)
1170 {
1171         ebitmap_init(&t->types);
1172         ebitmap_init(&t->negset);
1173 }
1174
1175 static int type_set_read(struct type_set *t, void *fp)
1176 {
1177         __le32 buf[1];
1178         int rc;
1179
1180         if (ebitmap_read(&t->types, fp))
1181                 return -EINVAL;
1182         if (ebitmap_read(&t->negset, fp))
1183                 return -EINVAL;
1184
1185         rc = next_entry(buf, fp, sizeof(u32));
1186         if (rc < 0)
1187                 return -EINVAL;
1188         t->flags = le32_to_cpu(buf[0]);
1189
1190         return 0;
1191 }
1192
1193
1194 static int read_cons_helper(struct policydb *p,
1195                                 struct constraint_node **nodep,
1196                                 int ncons, int allowxtarget, void *fp)
1197 {
1198         struct constraint_node *c, *lc;
1199         struct constraint_expr *e, *le;
1200         __le32 buf[3];
1201         u32 nexpr;
1202         int rc, i, j, depth;
1203
1204         lc = NULL;
1205         for (i = 0; i < ncons; i++) {
1206                 c = kzalloc(sizeof(*c), GFP_KERNEL);
1207                 if (!c)
1208                         return -ENOMEM;
1209
1210                 if (lc)
1211                         lc->next = c;
1212                 else
1213                         *nodep = c;
1214
1215                 rc = next_entry(buf, fp, (sizeof(u32) * 2));
1216                 if (rc)
1217                         return rc;
1218                 c->permissions = le32_to_cpu(buf[0]);
1219                 nexpr = le32_to_cpu(buf[1]);
1220                 le = NULL;
1221                 depth = -1;
1222                 for (j = 0; j < nexpr; j++) {
1223                         e = kzalloc(sizeof(*e), GFP_KERNEL);
1224                         if (!e)
1225                                 return -ENOMEM;
1226
1227                         if (le)
1228                                 le->next = e;
1229                         else
1230                                 c->expr = e;
1231
1232                         rc = next_entry(buf, fp, (sizeof(u32) * 3));
1233                         if (rc)
1234                                 return rc;
1235                         e->expr_type = le32_to_cpu(buf[0]);
1236                         e->attr = le32_to_cpu(buf[1]);
1237                         e->op = le32_to_cpu(buf[2]);
1238
1239                         switch (e->expr_type) {
1240                         case CEXPR_NOT:
1241                                 if (depth < 0)
1242                                         return -EINVAL;
1243                                 break;
1244                         case CEXPR_AND:
1245                         case CEXPR_OR:
1246                                 if (depth < 1)
1247                                         return -EINVAL;
1248                                 depth--;
1249                                 break;
1250                         case CEXPR_ATTR:
1251                                 if (depth == (CEXPR_MAXDEPTH - 1))
1252                                         return -EINVAL;
1253                                 depth++;
1254                                 break;
1255                         case CEXPR_NAMES:
1256                                 if (!allowxtarget && (e->attr & CEXPR_XTARGET))
1257                                         return -EINVAL;
1258                                 if (depth == (CEXPR_MAXDEPTH - 1))
1259                                         return -EINVAL;
1260                                 depth++;
1261                                 rc = ebitmap_read(&e->names, fp);
1262                                 if (rc)
1263                                         return rc;
1264                                 if (p->policyvers >=
1265                                     POLICYDB_VERSION_CONSTRAINT_NAMES) {
1266                                         e->type_names = kzalloc(sizeof
1267                                                 (*e->type_names), GFP_KERNEL);
1268                                         if (!e->type_names)
1269                                                 return -ENOMEM;
1270                                         type_set_init(e->type_names);
1271                                         rc = type_set_read(e->type_names, fp);
1272                                         if (rc)
1273                                                 return rc;
1274                                 }
1275                                 break;
1276                         default:
1277                                 return -EINVAL;
1278                         }
1279                         le = e;
1280                 }
1281                 if (depth != 0)
1282                         return -EINVAL;
1283                 lc = c;
1284         }
1285
1286         return 0;
1287 }
1288
1289 static int class_read(struct policydb *p, struct symtab *s, void *fp)
1290 {
1291         char *key = NULL;
1292         struct class_datum *cladatum;
1293         __le32 buf[6];
1294         u32 len, len2, ncons, nel;
1295         int i, rc;
1296
1297         cladatum = kzalloc(sizeof(*cladatum), GFP_KERNEL);
1298         if (!cladatum)
1299                 return -ENOMEM;
1300
1301         rc = next_entry(buf, fp, sizeof(u32)*6);
1302         if (rc)
1303                 goto bad;
1304
1305         len = le32_to_cpu(buf[0]);
1306         len2 = le32_to_cpu(buf[1]);
1307         cladatum->value = le32_to_cpu(buf[2]);
1308         nel = le32_to_cpu(buf[4]);
1309
1310         rc = symtab_init(&cladatum->permissions, nel);
1311         if (rc)
1312                 goto bad;
1313         cladatum->permissions.nprim = le32_to_cpu(buf[3]);
1314
1315         ncons = le32_to_cpu(buf[5]);
1316
1317         rc = str_read(&key, GFP_KERNEL, fp, len);
1318         if (rc)
1319                 goto bad;
1320
1321         if (len2) {
1322                 rc = str_read(&cladatum->comkey, GFP_KERNEL, fp, len2);
1323                 if (rc)
1324                         goto bad;
1325
1326                 rc = -EINVAL;
1327                 cladatum->comdatum = symtab_search(&p->p_commons,
1328                                                    cladatum->comkey);
1329                 if (!cladatum->comdatum) {
1330                         pr_err("SELinux:  unknown common %s\n",
1331                                cladatum->comkey);
1332                         goto bad;
1333                 }
1334         }
1335         for (i = 0; i < nel; i++) {
1336                 rc = perm_read(p, &cladatum->permissions, fp);
1337                 if (rc)
1338                         goto bad;
1339         }
1340
1341         rc = read_cons_helper(p, &cladatum->constraints, ncons, 0, fp);
1342         if (rc)
1343                 goto bad;
1344
1345         if (p->policyvers >= POLICYDB_VERSION_VALIDATETRANS) {
1346                 /* grab the validatetrans rules */
1347                 rc = next_entry(buf, fp, sizeof(u32));
1348                 if (rc)
1349                         goto bad;
1350                 ncons = le32_to_cpu(buf[0]);
1351                 rc = read_cons_helper(p, &cladatum->validatetrans,
1352                                 ncons, 1, fp);
1353                 if (rc)
1354                         goto bad;
1355         }
1356
1357         if (p->policyvers >= POLICYDB_VERSION_NEW_OBJECT_DEFAULTS) {
1358                 rc = next_entry(buf, fp, sizeof(u32) * 3);
1359                 if (rc)
1360                         goto bad;
1361
1362                 cladatum->default_user = le32_to_cpu(buf[0]);
1363                 cladatum->default_role = le32_to_cpu(buf[1]);
1364                 cladatum->default_range = le32_to_cpu(buf[2]);
1365         }
1366
1367         if (p->policyvers >= POLICYDB_VERSION_DEFAULT_TYPE) {
1368                 rc = next_entry(buf, fp, sizeof(u32) * 1);
1369                 if (rc)
1370                         goto bad;
1371                 cladatum->default_type = le32_to_cpu(buf[0]);
1372         }
1373
1374         rc = symtab_insert(s, key, cladatum);
1375         if (rc)
1376                 goto bad;
1377
1378         return 0;
1379 bad:
1380         cls_destroy(key, cladatum, NULL);
1381         return rc;
1382 }
1383
1384 static int role_read(struct policydb *p, struct symtab *s, void *fp)
1385 {
1386         char *key = NULL;
1387         struct role_datum *role;
1388         int rc, to_read = 2;
1389         __le32 buf[3];
1390         u32 len;
1391
1392         role = kzalloc(sizeof(*role), GFP_KERNEL);
1393         if (!role)
1394                 return -ENOMEM;
1395
1396         if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1397                 to_read = 3;
1398
1399         rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1400         if (rc)
1401                 goto bad;
1402
1403         len = le32_to_cpu(buf[0]);
1404         role->value = le32_to_cpu(buf[1]);
1405         if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1406                 role->bounds = le32_to_cpu(buf[2]);
1407
1408         rc = str_read(&key, GFP_KERNEL, fp, len);
1409         if (rc)
1410                 goto bad;
1411
1412         rc = ebitmap_read(&role->dominates, fp);
1413         if (rc)
1414                 goto bad;
1415
1416         rc = ebitmap_read(&role->types, fp);
1417         if (rc)
1418                 goto bad;
1419
1420         if (strcmp(key, OBJECT_R) == 0) {
1421                 rc = -EINVAL;
1422                 if (role->value != OBJECT_R_VAL) {
1423                         pr_err("SELinux: Role %s has wrong value %d\n",
1424                                OBJECT_R, role->value);
1425                         goto bad;
1426                 }
1427                 rc = 0;
1428                 goto bad;
1429         }
1430
1431         rc = symtab_insert(s, key, role);
1432         if (rc)
1433                 goto bad;
1434         return 0;
1435 bad:
1436         role_destroy(key, role, NULL);
1437         return rc;
1438 }
1439
1440 static int type_read(struct policydb *p, struct symtab *s, void *fp)
1441 {
1442         char *key = NULL;
1443         struct type_datum *typdatum;
1444         int rc, to_read = 3;
1445         __le32 buf[4];
1446         u32 len;
1447
1448         typdatum = kzalloc(sizeof(*typdatum), GFP_KERNEL);
1449         if (!typdatum)
1450                 return -ENOMEM;
1451
1452         if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1453                 to_read = 4;
1454
1455         rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1456         if (rc)
1457                 goto bad;
1458
1459         len = le32_to_cpu(buf[0]);
1460         typdatum->value = le32_to_cpu(buf[1]);
1461         if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) {
1462                 u32 prop = le32_to_cpu(buf[2]);
1463
1464                 if (prop & TYPEDATUM_PROPERTY_PRIMARY)
1465                         typdatum->primary = 1;
1466                 if (prop & TYPEDATUM_PROPERTY_ATTRIBUTE)
1467                         typdatum->attribute = 1;
1468
1469                 typdatum->bounds = le32_to_cpu(buf[3]);
1470         } else {
1471                 typdatum->primary = le32_to_cpu(buf[2]);
1472         }
1473
1474         rc = str_read(&key, GFP_KERNEL, fp, len);
1475         if (rc)
1476                 goto bad;
1477
1478         rc = symtab_insert(s, key, typdatum);
1479         if (rc)
1480                 goto bad;
1481         return 0;
1482 bad:
1483         type_destroy(key, typdatum, NULL);
1484         return rc;
1485 }
1486
1487
1488 /*
1489  * Read a MLS level structure from a policydb binary
1490  * representation file.
1491  */
1492 static int mls_read_level(struct mls_level *lp, void *fp)
1493 {
1494         __le32 buf[1];
1495         int rc;
1496
1497         memset(lp, 0, sizeof(*lp));
1498
1499         rc = next_entry(buf, fp, sizeof buf);
1500         if (rc) {
1501                 pr_err("SELinux: mls: truncated level\n");
1502                 return rc;
1503         }
1504         lp->sens = le32_to_cpu(buf[0]);
1505
1506         rc = ebitmap_read(&lp->cat, fp);
1507         if (rc) {
1508                 pr_err("SELinux: mls:  error reading level categories\n");
1509                 return rc;
1510         }
1511         return 0;
1512 }
1513
1514 static int user_read(struct policydb *p, struct symtab *s, void *fp)
1515 {
1516         char *key = NULL;
1517         struct user_datum *usrdatum;
1518         int rc, to_read = 2;
1519         __le32 buf[3];
1520         u32 len;
1521
1522         usrdatum = kzalloc(sizeof(*usrdatum), GFP_KERNEL);
1523         if (!usrdatum)
1524                 return -ENOMEM;
1525
1526         if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1527                 to_read = 3;
1528
1529         rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1530         if (rc)
1531                 goto bad;
1532
1533         len = le32_to_cpu(buf[0]);
1534         usrdatum->value = le32_to_cpu(buf[1]);
1535         if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1536                 usrdatum->bounds = le32_to_cpu(buf[2]);
1537
1538         rc = str_read(&key, GFP_KERNEL, fp, len);
1539         if (rc)
1540                 goto bad;
1541
1542         rc = ebitmap_read(&usrdatum->roles, fp);
1543         if (rc)
1544                 goto bad;
1545
1546         if (p->policyvers >= POLICYDB_VERSION_MLS) {
1547                 rc = mls_read_range_helper(&usrdatum->range, fp);
1548                 if (rc)
1549                         goto bad;
1550                 rc = mls_read_level(&usrdatum->dfltlevel, fp);
1551                 if (rc)
1552                         goto bad;
1553         }
1554
1555         rc = symtab_insert(s, key, usrdatum);
1556         if (rc)
1557                 goto bad;
1558         return 0;
1559 bad:
1560         user_destroy(key, usrdatum, NULL);
1561         return rc;
1562 }
1563
1564 static int sens_read(struct policydb *p, struct symtab *s, void *fp)
1565 {
1566         char *key = NULL;
1567         struct level_datum *levdatum;
1568         int rc;
1569         __le32 buf[2];
1570         u32 len;
1571
1572         levdatum = kzalloc(sizeof(*levdatum), GFP_ATOMIC);
1573         if (!levdatum)
1574                 return -ENOMEM;
1575
1576         rc = next_entry(buf, fp, sizeof buf);
1577         if (rc)
1578                 goto bad;
1579
1580         len = le32_to_cpu(buf[0]);
1581         levdatum->isalias = le32_to_cpu(buf[1]);
1582
1583         rc = str_read(&key, GFP_ATOMIC, fp, len);
1584         if (rc)
1585                 goto bad;
1586
1587         rc = -ENOMEM;
1588         levdatum->level = kmalloc(sizeof(*levdatum->level), GFP_ATOMIC);
1589         if (!levdatum->level)
1590                 goto bad;
1591
1592         rc = mls_read_level(levdatum->level, fp);
1593         if (rc)
1594                 goto bad;
1595
1596         rc = symtab_insert(s, key, levdatum);
1597         if (rc)
1598                 goto bad;
1599         return 0;
1600 bad:
1601         sens_destroy(key, levdatum, NULL);
1602         return rc;
1603 }
1604
1605 static int cat_read(struct policydb *p, struct symtab *s, void *fp)
1606 {
1607         char *key = NULL;
1608         struct cat_datum *catdatum;
1609         int rc;
1610         __le32 buf[3];
1611         u32 len;
1612
1613         catdatum = kzalloc(sizeof(*catdatum), GFP_ATOMIC);
1614         if (!catdatum)
1615                 return -ENOMEM;
1616
1617         rc = next_entry(buf, fp, sizeof buf);
1618         if (rc)
1619                 goto bad;
1620
1621         len = le32_to_cpu(buf[0]);
1622         catdatum->value = le32_to_cpu(buf[1]);
1623         catdatum->isalias = le32_to_cpu(buf[2]);
1624
1625         rc = str_read(&key, GFP_ATOMIC, fp, len);
1626         if (rc)
1627                 goto bad;
1628
1629         rc = symtab_insert(s, key, catdatum);
1630         if (rc)
1631                 goto bad;
1632         return 0;
1633 bad:
1634         cat_destroy(key, catdatum, NULL);
1635         return rc;
1636 }
1637
1638 static int (*const read_f[SYM_NUM]) (struct policydb *p,
1639                                      struct symtab *s, void *fp) = {
1640         common_read,
1641         class_read,
1642         role_read,
1643         type_read,
1644         user_read,
1645         cond_read_bool,
1646         sens_read,
1647         cat_read,
1648 };
1649
1650 static int user_bounds_sanity_check(void *key, void *datum, void *datap)
1651 {
1652         struct user_datum *upper, *user;
1653         struct policydb *p = datap;
1654         int depth = 0;
1655
1656         upper = user = datum;
1657         while (upper->bounds) {
1658                 struct ebitmap_node *node;
1659                 unsigned long bit;
1660
1661                 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1662                         pr_err("SELinux: user %s: "
1663                                "too deep or looped boundary",
1664                                (char *) key);
1665                         return -EINVAL;
1666                 }
1667
1668                 upper = p->user_val_to_struct[upper->bounds - 1];
1669                 ebitmap_for_each_positive_bit(&user->roles, node, bit) {
1670                         if (ebitmap_get_bit(&upper->roles, bit))
1671                                 continue;
1672
1673                         pr_err("SELinux: boundary violated policy: "
1674                                "user=%s role=%s bounds=%s\n",
1675                                sym_name(p, SYM_USERS, user->value - 1),
1676                                sym_name(p, SYM_ROLES, bit),
1677                                sym_name(p, SYM_USERS, upper->value - 1));
1678
1679                         return -EINVAL;
1680                 }
1681         }
1682
1683         return 0;
1684 }
1685
1686 static int role_bounds_sanity_check(void *key, void *datum, void *datap)
1687 {
1688         struct role_datum *upper, *role;
1689         struct policydb *p = datap;
1690         int depth = 0;
1691
1692         upper = role = datum;
1693         while (upper->bounds) {
1694                 struct ebitmap_node *node;
1695                 unsigned long bit;
1696
1697                 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1698                         pr_err("SELinux: role %s: "
1699                                "too deep or looped bounds\n",
1700                                (char *) key);
1701                         return -EINVAL;
1702                 }
1703
1704                 upper = p->role_val_to_struct[upper->bounds - 1];
1705                 ebitmap_for_each_positive_bit(&role->types, node, bit) {
1706                         if (ebitmap_get_bit(&upper->types, bit))
1707                                 continue;
1708
1709                         pr_err("SELinux: boundary violated policy: "
1710                                "role=%s type=%s bounds=%s\n",
1711                                sym_name(p, SYM_ROLES, role->value - 1),
1712                                sym_name(p, SYM_TYPES, bit),
1713                                sym_name(p, SYM_ROLES, upper->value - 1));
1714
1715                         return -EINVAL;
1716                 }
1717         }
1718
1719         return 0;
1720 }
1721
1722 static int type_bounds_sanity_check(void *key, void *datum, void *datap)
1723 {
1724         struct type_datum *upper;
1725         struct policydb *p = datap;
1726         int depth = 0;
1727
1728         upper = datum;
1729         while (upper->bounds) {
1730                 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1731                         pr_err("SELinux: type %s: "
1732                                "too deep or looped boundary\n",
1733                                (char *) key);
1734                         return -EINVAL;
1735                 }
1736
1737                 upper = p->type_val_to_struct[upper->bounds - 1];
1738                 BUG_ON(!upper);
1739
1740                 if (upper->attribute) {
1741                         pr_err("SELinux: type %s: "
1742                                "bounded by attribute %s",
1743                                (char *) key,
1744                                sym_name(p, SYM_TYPES, upper->value - 1));
1745                         return -EINVAL;
1746                 }
1747         }
1748
1749         return 0;
1750 }
1751
1752 static int policydb_bounds_sanity_check(struct policydb *p)
1753 {
1754         int rc;
1755
1756         if (p->policyvers < POLICYDB_VERSION_BOUNDARY)
1757                 return 0;
1758
1759         rc = hashtab_map(&p->p_users.table, user_bounds_sanity_check, p);
1760         if (rc)
1761                 return rc;
1762
1763         rc = hashtab_map(&p->p_roles.table, role_bounds_sanity_check, p);
1764         if (rc)
1765                 return rc;
1766
1767         rc = hashtab_map(&p->p_types.table, type_bounds_sanity_check, p);
1768         if (rc)
1769                 return rc;
1770
1771         return 0;
1772 }
1773
1774 u16 string_to_security_class(struct policydb *p, const char *name)
1775 {
1776         struct class_datum *cladatum;
1777
1778         cladatum = symtab_search(&p->p_classes, name);
1779         if (!cladatum)
1780                 return 0;
1781
1782         return cladatum->value;
1783 }
1784
1785 u32 string_to_av_perm(struct policydb *p, u16 tclass, const char *name)
1786 {
1787         struct class_datum *cladatum;
1788         struct perm_datum *perdatum = NULL;
1789         struct common_datum *comdatum;
1790
1791         if (!tclass || tclass > p->p_classes.nprim)
1792                 return 0;
1793
1794         cladatum = p->class_val_to_struct[tclass-1];
1795         comdatum = cladatum->comdatum;
1796         if (comdatum)
1797                 perdatum = symtab_search(&comdatum->permissions, name);
1798         if (!perdatum)
1799                 perdatum = symtab_search(&cladatum->permissions, name);
1800         if (!perdatum)
1801                 return 0;
1802
1803         return 1U << (perdatum->value-1);
1804 }
1805
1806 static int range_read(struct policydb *p, void *fp)
1807 {
1808         struct range_trans *rt = NULL;
1809         struct mls_range *r = NULL;
1810         int i, rc;
1811         __le32 buf[2];
1812         u32 nel;
1813
1814         if (p->policyvers < POLICYDB_VERSION_MLS)
1815                 return 0;
1816
1817         rc = next_entry(buf, fp, sizeof(u32));
1818         if (rc)
1819                 return rc;
1820
1821         nel = le32_to_cpu(buf[0]);
1822
1823         rc = hashtab_init(&p->range_tr, nel);
1824         if (rc)
1825                 return rc;
1826
1827         for (i = 0; i < nel; i++) {
1828                 rc = -ENOMEM;
1829                 rt = kzalloc(sizeof(*rt), GFP_KERNEL);
1830                 if (!rt)
1831                         goto out;
1832
1833                 rc = next_entry(buf, fp, (sizeof(u32) * 2));
1834                 if (rc)
1835                         goto out;
1836
1837                 rt->source_type = le32_to_cpu(buf[0]);
1838                 rt->target_type = le32_to_cpu(buf[1]);
1839                 if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) {
1840                         rc = next_entry(buf, fp, sizeof(u32));
1841                         if (rc)
1842                                 goto out;
1843                         rt->target_class = le32_to_cpu(buf[0]);
1844                 } else
1845                         rt->target_class = p->process_class;
1846
1847                 rc = -EINVAL;
1848                 if (!policydb_type_isvalid(p, rt->source_type) ||
1849                     !policydb_type_isvalid(p, rt->target_type) ||
1850                     !policydb_class_isvalid(p, rt->target_class))
1851                         goto out;
1852
1853                 rc = -ENOMEM;
1854                 r = kzalloc(sizeof(*r), GFP_KERNEL);
1855                 if (!r)
1856                         goto out;
1857
1858                 rc = mls_read_range_helper(r, fp);
1859                 if (rc)
1860                         goto out;
1861
1862                 rc = -EINVAL;
1863                 if (!mls_range_isvalid(p, r)) {
1864                         pr_warn("SELinux:  rangetrans:  invalid range\n");
1865                         goto out;
1866                 }
1867
1868                 rc = hashtab_insert(&p->range_tr, rt, r, rangetr_key_params);
1869                 if (rc)
1870                         goto out;
1871
1872                 rt = NULL;
1873                 r = NULL;
1874         }
1875         hash_eval(&p->range_tr, "rangetr");
1876         rc = 0;
1877 out:
1878         kfree(rt);
1879         kfree(r);
1880         return rc;
1881 }
1882
1883 static int filename_trans_read_helper_compat(struct policydb *p, void *fp)
1884 {
1885         struct filename_trans_key key, *ft = NULL;
1886         struct filename_trans_datum *last, *datum = NULL;
1887         char *name = NULL;
1888         u32 len, stype, otype;
1889         __le32 buf[4];
1890         int rc;
1891
1892         /* length of the path component string */
1893         rc = next_entry(buf, fp, sizeof(u32));
1894         if (rc)
1895                 return rc;
1896         len = le32_to_cpu(buf[0]);
1897
1898         /* path component string */
1899         rc = str_read(&name, GFP_KERNEL, fp, len);
1900         if (rc)
1901                 return rc;
1902
1903         rc = next_entry(buf, fp, sizeof(u32) * 4);
1904         if (rc)
1905                 goto out;
1906
1907         stype = le32_to_cpu(buf[0]);
1908         key.ttype = le32_to_cpu(buf[1]);
1909         key.tclass = le32_to_cpu(buf[2]);
1910         key.name = name;
1911
1912         otype = le32_to_cpu(buf[3]);
1913
1914         last = NULL;
1915         datum = policydb_filenametr_search(p, &key);
1916         while (datum) {
1917                 if (unlikely(ebitmap_get_bit(&datum->stypes, stype - 1))) {
1918                         /* conflicting/duplicate rules are ignored */
1919                         datum = NULL;
1920                         goto out;
1921                 }
1922                 if (likely(datum->otype == otype))
1923                         break;
1924                 last = datum;
1925                 datum = datum->next;
1926         }
1927         if (!datum) {
1928                 rc = -ENOMEM;
1929                 datum = kmalloc(sizeof(*datum), GFP_KERNEL);
1930                 if (!datum)
1931                         goto out;
1932
1933                 ebitmap_init(&datum->stypes);
1934                 datum->otype = otype;
1935                 datum->next = NULL;
1936
1937                 if (unlikely(last)) {
1938                         last->next = datum;
1939                 } else {
1940                         rc = -ENOMEM;
1941                         ft = kmemdup(&key, sizeof(key), GFP_KERNEL);
1942                         if (!ft)
1943                                 goto out;
1944
1945                         rc = hashtab_insert(&p->filename_trans, ft, datum,
1946                                             filenametr_key_params);
1947                         if (rc)
1948                                 goto out;
1949                         name = NULL;
1950
1951                         rc = ebitmap_set_bit(&p->filename_trans_ttypes,
1952                                              key.ttype, 1);
1953                         if (rc)
1954                                 return rc;
1955                 }
1956         }
1957         kfree(name);
1958         return ebitmap_set_bit(&datum->stypes, stype - 1, 1);
1959
1960 out:
1961         kfree(ft);
1962         kfree(name);
1963         kfree(datum);
1964         return rc;
1965 }
1966
1967 static int filename_trans_read_helper(struct policydb *p, void *fp)
1968 {
1969         struct filename_trans_key *ft = NULL;
1970         struct filename_trans_datum **dst, *datum, *first = NULL;
1971         char *name = NULL;
1972         u32 len, ttype, tclass, ndatum, i;
1973         __le32 buf[3];
1974         int rc;
1975
1976         /* length of the path component string */
1977         rc = next_entry(buf, fp, sizeof(u32));
1978         if (rc)
1979                 return rc;
1980         len = le32_to_cpu(buf[0]);
1981
1982         /* path component string */
1983         rc = str_read(&name, GFP_KERNEL, fp, len);
1984         if (rc)
1985                 return rc;
1986
1987         rc = next_entry(buf, fp, sizeof(u32) * 3);
1988         if (rc)
1989                 goto out;
1990
1991         ttype = le32_to_cpu(buf[0]);
1992         tclass = le32_to_cpu(buf[1]);
1993
1994         ndatum = le32_to_cpu(buf[2]);
1995         if (ndatum == 0) {
1996                 pr_err("SELinux:  Filename transition key with no datum\n");
1997                 rc = -ENOENT;
1998                 goto out;
1999         }
2000
2001         dst = &first;
2002         for (i = 0; i < ndatum; i++) {
2003                 rc = -ENOMEM;
2004                 datum = kmalloc(sizeof(*datum), GFP_KERNEL);
2005                 if (!datum)
2006                         goto out;
2007
2008                 *dst = datum;
2009
2010                 /* ebitmap_read() will at least init the bitmap */
2011                 rc = ebitmap_read(&datum->stypes, fp);
2012                 if (rc)
2013                         goto out;
2014
2015                 rc = next_entry(buf, fp, sizeof(u32));
2016                 if (rc)
2017                         goto out;
2018
2019                 datum->otype = le32_to_cpu(buf[0]);
2020                 datum->next = NULL;
2021
2022                 dst = &datum->next;
2023         }
2024
2025         rc = -ENOMEM;
2026         ft = kmalloc(sizeof(*ft), GFP_KERNEL);
2027         if (!ft)
2028                 goto out;
2029
2030         ft->ttype = ttype;
2031         ft->tclass = tclass;
2032         ft->name = name;
2033
2034         rc = hashtab_insert(&p->filename_trans, ft, first,
2035                             filenametr_key_params);
2036         if (rc == -EEXIST)
2037                 pr_err("SELinux:  Duplicate filename transition key\n");
2038         if (rc)
2039                 goto out;
2040
2041         return ebitmap_set_bit(&p->filename_trans_ttypes, ttype, 1);
2042
2043 out:
2044         kfree(ft);
2045         kfree(name);
2046         while (first) {
2047                 datum = first;
2048                 first = first->next;
2049
2050                 ebitmap_destroy(&datum->stypes);
2051                 kfree(datum);
2052         }
2053         return rc;
2054 }
2055
2056 static int filename_trans_read(struct policydb *p, void *fp)
2057 {
2058         u32 nel;
2059         __le32 buf[1];
2060         int rc, i;
2061
2062         if (p->policyvers < POLICYDB_VERSION_FILENAME_TRANS)
2063                 return 0;
2064
2065         rc = next_entry(buf, fp, sizeof(u32));
2066         if (rc)
2067                 return rc;
2068         nel = le32_to_cpu(buf[0]);
2069
2070         if (p->policyvers < POLICYDB_VERSION_COMP_FTRANS) {
2071                 p->compat_filename_trans_count = nel;
2072
2073                 rc = hashtab_init(&p->filename_trans, (1 << 11));
2074                 if (rc)
2075                         return rc;
2076
2077                 for (i = 0; i < nel; i++) {
2078                         rc = filename_trans_read_helper_compat(p, fp);
2079                         if (rc)
2080                                 return rc;
2081                 }
2082         } else {
2083                 rc = hashtab_init(&p->filename_trans, nel);
2084                 if (rc)
2085                         return rc;
2086
2087                 for (i = 0; i < nel; i++) {
2088                         rc = filename_trans_read_helper(p, fp);
2089                         if (rc)
2090                                 return rc;
2091                 }
2092         }
2093         hash_eval(&p->filename_trans, "filenametr");
2094         return 0;
2095 }
2096
2097 static int genfs_read(struct policydb *p, void *fp)
2098 {
2099         int i, j, rc;
2100         u32 nel, nel2, len, len2;
2101         __le32 buf[1];
2102         struct ocontext *l, *c;
2103         struct ocontext *newc = NULL;
2104         struct genfs *genfs_p, *genfs;
2105         struct genfs *newgenfs = NULL;
2106
2107         rc = next_entry(buf, fp, sizeof(u32));
2108         if (rc)
2109                 return rc;
2110         nel = le32_to_cpu(buf[0]);
2111
2112         for (i = 0; i < nel; i++) {
2113                 rc = next_entry(buf, fp, sizeof(u32));
2114                 if (rc)
2115                         goto out;
2116                 len = le32_to_cpu(buf[0]);
2117
2118                 rc = -ENOMEM;
2119                 newgenfs = kzalloc(sizeof(*newgenfs), GFP_KERNEL);
2120                 if (!newgenfs)
2121                         goto out;
2122
2123                 rc = str_read(&newgenfs->fstype, GFP_KERNEL, fp, len);
2124                 if (rc)
2125                         goto out;
2126
2127                 for (genfs_p = NULL, genfs = p->genfs; genfs;
2128                      genfs_p = genfs, genfs = genfs->next) {
2129                         rc = -EINVAL;
2130                         if (strcmp(newgenfs->fstype, genfs->fstype) == 0) {
2131                                 pr_err("SELinux:  dup genfs fstype %s\n",
2132                                        newgenfs->fstype);
2133                                 goto out;
2134                         }
2135                         if (strcmp(newgenfs->fstype, genfs->fstype) < 0)
2136                                 break;
2137                 }
2138                 newgenfs->next = genfs;
2139                 if (genfs_p)
2140                         genfs_p->next = newgenfs;
2141                 else
2142                         p->genfs = newgenfs;
2143                 genfs = newgenfs;
2144                 newgenfs = NULL;
2145
2146                 rc = next_entry(buf, fp, sizeof(u32));
2147                 if (rc)
2148                         goto out;
2149
2150                 nel2 = le32_to_cpu(buf[0]);
2151                 for (j = 0; j < nel2; j++) {
2152                         rc = next_entry(buf, fp, sizeof(u32));
2153                         if (rc)
2154                                 goto out;
2155                         len = le32_to_cpu(buf[0]);
2156
2157                         rc = -ENOMEM;
2158                         newc = kzalloc(sizeof(*newc), GFP_KERNEL);
2159                         if (!newc)
2160                                 goto out;
2161
2162                         rc = str_read(&newc->u.name, GFP_KERNEL, fp, len);
2163                         if (rc)
2164                                 goto out;
2165
2166                         rc = next_entry(buf, fp, sizeof(u32));
2167                         if (rc)
2168                                 goto out;
2169
2170                         newc->v.sclass = le32_to_cpu(buf[0]);
2171                         rc = context_read_and_validate(&newc->context[0], p, fp);
2172                         if (rc)
2173                                 goto out;
2174
2175                         for (l = NULL, c = genfs->head; c;
2176                              l = c, c = c->next) {
2177                                 rc = -EINVAL;
2178                                 if (!strcmp(newc->u.name, c->u.name) &&
2179                                     (!c->v.sclass || !newc->v.sclass ||
2180                                      newc->v.sclass == c->v.sclass)) {
2181                                         pr_err("SELinux:  dup genfs entry (%s,%s)\n",
2182                                                genfs->fstype, c->u.name);
2183                                         goto out;
2184                                 }
2185                                 len = strlen(newc->u.name);
2186                                 len2 = strlen(c->u.name);
2187                                 if (len > len2)
2188                                         break;
2189                         }
2190
2191                         newc->next = c;
2192                         if (l)
2193                                 l->next = newc;
2194                         else
2195                                 genfs->head = newc;
2196                         newc = NULL;
2197                 }
2198         }
2199         rc = 0;
2200 out:
2201         if (newgenfs) {
2202                 kfree(newgenfs->fstype);
2203                 kfree(newgenfs);
2204         }
2205         ocontext_destroy(newc, OCON_FSUSE);
2206
2207         return rc;
2208 }
2209
2210 static int ocontext_read(struct policydb *p, const struct policydb_compat_info *info,
2211                          void *fp)
2212 {
2213         int i, j, rc;
2214         u32 nel, len;
2215         __be64 prefixbuf[1];
2216         __le32 buf[3];
2217         struct ocontext *l, *c;
2218         u32 nodebuf[8];
2219
2220         for (i = 0; i < info->ocon_num; i++) {
2221                 rc = next_entry(buf, fp, sizeof(u32));
2222                 if (rc)
2223                         goto out;
2224                 nel = le32_to_cpu(buf[0]);
2225
2226                 l = NULL;
2227                 for (j = 0; j < nel; j++) {
2228                         rc = -ENOMEM;
2229                         c = kzalloc(sizeof(*c), GFP_KERNEL);
2230                         if (!c)
2231                                 goto out;
2232                         if (l)
2233                                 l->next = c;
2234                         else
2235                                 p->ocontexts[i] = c;
2236                         l = c;
2237
2238                         switch (i) {
2239                         case OCON_ISID:
2240                                 rc = next_entry(buf, fp, sizeof(u32));
2241                                 if (rc)
2242                                         goto out;
2243
2244                                 c->sid[0] = le32_to_cpu(buf[0]);
2245                                 rc = context_read_and_validate(&c->context[0], p, fp);
2246                                 if (rc)
2247                                         goto out;
2248                                 break;
2249                         case OCON_FS:
2250                         case OCON_NETIF:
2251                                 rc = next_entry(buf, fp, sizeof(u32));
2252                                 if (rc)
2253                                         goto out;
2254                                 len = le32_to_cpu(buf[0]);
2255
2256                                 rc = str_read(&c->u.name, GFP_KERNEL, fp, len);
2257                                 if (rc)
2258                                         goto out;
2259
2260                                 rc = context_read_and_validate(&c->context[0], p, fp);
2261                                 if (rc)
2262                                         goto out;
2263                                 rc = context_read_and_validate(&c->context[1], p, fp);
2264                                 if (rc)
2265                                         goto out;
2266                                 break;
2267                         case OCON_PORT:
2268                                 rc = next_entry(buf, fp, sizeof(u32)*3);
2269                                 if (rc)
2270                                         goto out;
2271                                 c->u.port.protocol = le32_to_cpu(buf[0]);
2272                                 c->u.port.low_port = le32_to_cpu(buf[1]);
2273                                 c->u.port.high_port = le32_to_cpu(buf[2]);
2274                                 rc = context_read_and_validate(&c->context[0], p, fp);
2275                                 if (rc)
2276                                         goto out;
2277                                 break;
2278                         case OCON_NODE:
2279                                 rc = next_entry(nodebuf, fp, sizeof(u32) * 2);
2280                                 if (rc)
2281                                         goto out;
2282                                 c->u.node.addr = nodebuf[0]; /* network order */
2283                                 c->u.node.mask = nodebuf[1]; /* network order */
2284                                 rc = context_read_and_validate(&c->context[0], p, fp);
2285                                 if (rc)
2286                                         goto out;
2287                                 break;
2288                         case OCON_FSUSE:
2289                                 rc = next_entry(buf, fp, sizeof(u32)*2);
2290                                 if (rc)
2291                                         goto out;
2292
2293                                 rc = -EINVAL;
2294                                 c->v.behavior = le32_to_cpu(buf[0]);
2295                                 /* Determined at runtime, not in policy DB. */
2296                                 if (c->v.behavior == SECURITY_FS_USE_MNTPOINT)
2297                                         goto out;
2298                                 if (c->v.behavior > SECURITY_FS_USE_MAX)
2299                                         goto out;
2300
2301                                 len = le32_to_cpu(buf[1]);
2302                                 rc = str_read(&c->u.name, GFP_KERNEL, fp, len);
2303                                 if (rc)
2304                                         goto out;
2305
2306                                 rc = context_read_and_validate(&c->context[0], p, fp);
2307                                 if (rc)
2308                                         goto out;
2309                                 break;
2310                         case OCON_NODE6: {
2311                                 int k;
2312
2313                                 rc = next_entry(nodebuf, fp, sizeof(u32) * 8);
2314                                 if (rc)
2315                                         goto out;
2316                                 for (k = 0; k < 4; k++)
2317                                         c->u.node6.addr[k] = nodebuf[k];
2318                                 for (k = 0; k < 4; k++)
2319                                         c->u.node6.mask[k] = nodebuf[k+4];
2320                                 rc = context_read_and_validate(&c->context[0], p, fp);
2321                                 if (rc)
2322                                         goto out;
2323                                 break;
2324                         }
2325                         case OCON_IBPKEY: {
2326                                 u32 pkey_lo, pkey_hi;
2327
2328                                 rc = next_entry(prefixbuf, fp, sizeof(u64));
2329                                 if (rc)
2330                                         goto out;
2331
2332                                 /* we need to have subnet_prefix in CPU order */
2333                                 c->u.ibpkey.subnet_prefix = be64_to_cpu(prefixbuf[0]);
2334
2335                                 rc = next_entry(buf, fp, sizeof(u32) * 2);
2336                                 if (rc)
2337                                         goto out;
2338
2339                                 pkey_lo = le32_to_cpu(buf[0]);
2340                                 pkey_hi = le32_to_cpu(buf[1]);
2341
2342                                 if (pkey_lo > U16_MAX || pkey_hi > U16_MAX) {
2343                                         rc = -EINVAL;
2344                                         goto out;
2345                                 }
2346
2347                                 c->u.ibpkey.low_pkey  = pkey_lo;
2348                                 c->u.ibpkey.high_pkey = pkey_hi;
2349
2350                                 rc = context_read_and_validate(&c->context[0],
2351                                                                p,
2352                                                                fp);
2353                                 if (rc)
2354                                         goto out;
2355                                 break;
2356                         }
2357                         case OCON_IBENDPORT: {
2358                                 u32 port;
2359
2360                                 rc = next_entry(buf, fp, sizeof(u32) * 2);
2361                                 if (rc)
2362                                         goto out;
2363                                 len = le32_to_cpu(buf[0]);
2364
2365                                 rc = str_read(&c->u.ibendport.dev_name, GFP_KERNEL, fp, len);
2366                                 if (rc)
2367                                         goto out;
2368
2369                                 port = le32_to_cpu(buf[1]);
2370                                 if (port > U8_MAX || port == 0) {
2371                                         rc = -EINVAL;
2372                                         goto out;
2373                                 }
2374
2375                                 c->u.ibendport.port = port;
2376
2377                                 rc = context_read_and_validate(&c->context[0],
2378                                                                p,
2379                                                                fp);
2380                                 if (rc)
2381                                         goto out;
2382                                 break;
2383                         } /* end case */
2384                         } /* end switch */
2385                 }
2386         }
2387         rc = 0;
2388 out:
2389         return rc;
2390 }
2391
2392 /*
2393  * Read the configuration data from a policy database binary
2394  * representation file into a policy database structure.
2395  */
2396 int policydb_read(struct policydb *p, void *fp)
2397 {
2398         struct role_allow *ra, *lra;
2399         struct role_trans_key *rtk = NULL;
2400         struct role_trans_datum *rtd = NULL;
2401         int i, j, rc;
2402         __le32 buf[4];
2403         u32 len, nprim, nel, perm;
2404
2405         char *policydb_str;
2406         const struct policydb_compat_info *info;
2407
2408         policydb_init(p);
2409
2410         /* Read the magic number and string length. */
2411         rc = next_entry(buf, fp, sizeof(u32) * 2);
2412         if (rc)
2413                 goto bad;
2414
2415         rc = -EINVAL;
2416         if (le32_to_cpu(buf[0]) != POLICYDB_MAGIC) {
2417                 pr_err("SELinux:  policydb magic number 0x%x does "
2418                        "not match expected magic number 0x%x\n",
2419                        le32_to_cpu(buf[0]), POLICYDB_MAGIC);
2420                 goto bad;
2421         }
2422
2423         rc = -EINVAL;
2424         len = le32_to_cpu(buf[1]);
2425         if (len != strlen(POLICYDB_STRING)) {
2426                 pr_err("SELinux:  policydb string length %d does not "
2427                        "match expected length %zu\n",
2428                        len, strlen(POLICYDB_STRING));
2429                 goto bad;
2430         }
2431
2432         rc = -ENOMEM;
2433         policydb_str = kmalloc(len + 1, GFP_KERNEL);
2434         if (!policydb_str) {
2435                 pr_err("SELinux:  unable to allocate memory for policydb "
2436                        "string of length %d\n", len);
2437                 goto bad;
2438         }
2439
2440         rc = next_entry(policydb_str, fp, len);
2441         if (rc) {
2442                 pr_err("SELinux:  truncated policydb string identifier\n");
2443                 kfree(policydb_str);
2444                 goto bad;
2445         }
2446
2447         rc = -EINVAL;
2448         policydb_str[len] = '\0';
2449         if (strcmp(policydb_str, POLICYDB_STRING)) {
2450                 pr_err("SELinux:  policydb string %s does not match "
2451                        "my string %s\n", policydb_str, POLICYDB_STRING);
2452                 kfree(policydb_str);
2453                 goto bad;
2454         }
2455         /* Done with policydb_str. */
2456         kfree(policydb_str);
2457         policydb_str = NULL;
2458
2459         /* Read the version and table sizes. */
2460         rc = next_entry(buf, fp, sizeof(u32)*4);
2461         if (rc)
2462                 goto bad;
2463
2464         rc = -EINVAL;
2465         p->policyvers = le32_to_cpu(buf[0]);
2466         if (p->policyvers < POLICYDB_VERSION_MIN ||
2467             p->policyvers > POLICYDB_VERSION_MAX) {
2468                 pr_err("SELinux:  policydb version %d does not match "
2469                        "my version range %d-%d\n",
2470                        le32_to_cpu(buf[0]), POLICYDB_VERSION_MIN, POLICYDB_VERSION_MAX);
2471                 goto bad;
2472         }
2473
2474         if ((le32_to_cpu(buf[1]) & POLICYDB_CONFIG_MLS)) {
2475                 p->mls_enabled = 1;
2476
2477                 rc = -EINVAL;
2478                 if (p->policyvers < POLICYDB_VERSION_MLS) {
2479                         pr_err("SELinux: security policydb version %d "
2480                                 "(MLS) not backwards compatible\n",
2481                                 p->policyvers);
2482                         goto bad;
2483                 }
2484         }
2485         p->reject_unknown = !!(le32_to_cpu(buf[1]) & REJECT_UNKNOWN);
2486         p->allow_unknown = !!(le32_to_cpu(buf[1]) & ALLOW_UNKNOWN);
2487
2488         if (p->policyvers >= POLICYDB_VERSION_POLCAP) {
2489                 rc = ebitmap_read(&p->policycaps, fp);
2490                 if (rc)
2491                         goto bad;
2492         }
2493
2494         if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE) {
2495                 rc = ebitmap_read(&p->permissive_map, fp);
2496                 if (rc)
2497                         goto bad;
2498         }
2499
2500         rc = -EINVAL;
2501         info = policydb_lookup_compat(p->policyvers);
2502         if (!info) {
2503                 pr_err("SELinux:  unable to find policy compat info "
2504                        "for version %d\n", p->policyvers);
2505                 goto bad;
2506         }
2507
2508         rc = -EINVAL;
2509         if (le32_to_cpu(buf[2]) != info->sym_num ||
2510                 le32_to_cpu(buf[3]) != info->ocon_num) {
2511                 pr_err("SELinux:  policydb table sizes (%d,%d) do "
2512                        "not match mine (%d,%d)\n", le32_to_cpu(buf[2]),
2513                         le32_to_cpu(buf[3]),
2514                        info->sym_num, info->ocon_num);
2515                 goto bad;
2516         }
2517
2518         for (i = 0; i < info->sym_num; i++) {
2519                 rc = next_entry(buf, fp, sizeof(u32)*2);
2520                 if (rc)
2521                         goto bad;
2522                 nprim = le32_to_cpu(buf[0]);
2523                 nel = le32_to_cpu(buf[1]);
2524
2525                 rc = symtab_init(&p->symtab[i], nel);
2526                 if (rc)
2527                         goto out;
2528
2529                 if (i == SYM_ROLES) {
2530                         rc = roles_init(p);
2531                         if (rc)
2532                                 goto out;
2533                 }
2534
2535                 for (j = 0; j < nel; j++) {
2536                         rc = read_f[i](p, &p->symtab[i], fp);
2537                         if (rc)
2538                                 goto bad;
2539                 }
2540
2541                 p->symtab[i].nprim = nprim;
2542         }
2543
2544         rc = -EINVAL;
2545         p->process_class = string_to_security_class(p, "process");
2546         if (!p->process_class) {
2547                 pr_err("SELinux: process class is required, not defined in policy\n");
2548                 goto bad;
2549         }
2550
2551         rc = avtab_read(&p->te_avtab, fp, p);
2552         if (rc)
2553                 goto bad;
2554
2555         if (p->policyvers >= POLICYDB_VERSION_BOOL) {
2556                 rc = cond_read_list(p, fp);
2557                 if (rc)
2558                         goto bad;
2559         }
2560
2561         rc = next_entry(buf, fp, sizeof(u32));
2562         if (rc)
2563                 goto bad;
2564         nel = le32_to_cpu(buf[0]);
2565
2566         rc = hashtab_init(&p->role_tr, nel);
2567         if (rc)
2568                 goto bad;
2569         for (i = 0; i < nel; i++) {
2570                 rc = -ENOMEM;
2571                 rtk = kmalloc(sizeof(*rtk), GFP_KERNEL);
2572                 if (!rtk)
2573                         goto bad;
2574
2575                 rc = -ENOMEM;
2576                 rtd = kmalloc(sizeof(*rtd), GFP_KERNEL);
2577                 if (!rtd)
2578                         goto bad;
2579
2580                 rc = next_entry(buf, fp, sizeof(u32)*3);
2581                 if (rc)
2582                         goto bad;
2583
2584                 rtk->role = le32_to_cpu(buf[0]);
2585                 rtk->type = le32_to_cpu(buf[1]);
2586                 rtd->new_role = le32_to_cpu(buf[2]);
2587                 if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) {
2588                         rc = next_entry(buf, fp, sizeof(u32));
2589                         if (rc)
2590                                 goto bad;
2591                         rtk->tclass = le32_to_cpu(buf[0]);
2592                 } else
2593                         rtk->tclass = p->process_class;
2594
2595                 rc = -EINVAL;
2596                 if (!policydb_role_isvalid(p, rtk->role) ||
2597                     !policydb_type_isvalid(p, rtk->type) ||
2598                     !policydb_class_isvalid(p, rtk->tclass) ||
2599                     !policydb_role_isvalid(p, rtd->new_role))
2600                         goto bad;
2601
2602                 rc = hashtab_insert(&p->role_tr, rtk, rtd, roletr_key_params);
2603                 if (rc)
2604                         goto bad;
2605
2606                 rtk = NULL;
2607                 rtd = NULL;
2608         }
2609
2610         rc = next_entry(buf, fp, sizeof(u32));
2611         if (rc)
2612                 goto bad;
2613         nel = le32_to_cpu(buf[0]);
2614         lra = NULL;
2615         for (i = 0; i < nel; i++) {
2616                 rc = -ENOMEM;
2617                 ra = kzalloc(sizeof(*ra), GFP_KERNEL);
2618                 if (!ra)
2619                         goto bad;
2620                 if (lra)
2621                         lra->next = ra;
2622                 else
2623                         p->role_allow = ra;
2624                 rc = next_entry(buf, fp, sizeof(u32)*2);
2625                 if (rc)
2626                         goto bad;
2627
2628                 rc = -EINVAL;
2629                 ra->role = le32_to_cpu(buf[0]);
2630                 ra->new_role = le32_to_cpu(buf[1]);
2631                 if (!policydb_role_isvalid(p, ra->role) ||
2632                     !policydb_role_isvalid(p, ra->new_role))
2633                         goto bad;
2634                 lra = ra;
2635         }
2636
2637         rc = filename_trans_read(p, fp);
2638         if (rc)
2639                 goto bad;
2640
2641         rc = policydb_index(p);
2642         if (rc)
2643                 goto bad;
2644
2645         rc = -EINVAL;
2646         perm = string_to_av_perm(p, p->process_class, "transition");
2647         if (!perm) {
2648                 pr_err("SELinux: process transition permission is required, not defined in policy\n");
2649                 goto bad;
2650         }
2651         p->process_trans_perms = perm;
2652         perm = string_to_av_perm(p, p->process_class, "dyntransition");
2653         if (!perm) {
2654                 pr_err("SELinux: process dyntransition permission is required, not defined in policy\n");
2655                 goto bad;
2656         }
2657         p->process_trans_perms |= perm;
2658
2659         rc = ocontext_read(p, info, fp);
2660         if (rc)
2661                 goto bad;
2662
2663         rc = genfs_read(p, fp);
2664         if (rc)
2665                 goto bad;
2666
2667         rc = range_read(p, fp);
2668         if (rc)
2669                 goto bad;
2670
2671         rc = -ENOMEM;
2672         p->type_attr_map_array = kvcalloc(p->p_types.nprim,
2673                                           sizeof(*p->type_attr_map_array),
2674                                           GFP_KERNEL);
2675         if (!p->type_attr_map_array)
2676                 goto bad;
2677
2678         /* just in case ebitmap_init() becomes more than just a memset(0): */
2679         for (i = 0; i < p->p_types.nprim; i++)
2680                 ebitmap_init(&p->type_attr_map_array[i]);
2681
2682         for (i = 0; i < p->p_types.nprim; i++) {
2683                 struct ebitmap *e = &p->type_attr_map_array[i];
2684
2685                 if (p->policyvers >= POLICYDB_VERSION_AVTAB) {
2686                         rc = ebitmap_read(e, fp);
2687                         if (rc)
2688                                 goto bad;
2689                 }
2690                 /* add the type itself as the degenerate case */
2691                 rc = ebitmap_set_bit(e, i, 1);
2692                 if (rc)
2693                         goto bad;
2694         }
2695
2696         rc = policydb_bounds_sanity_check(p);
2697         if (rc)
2698                 goto bad;
2699
2700         rc = 0;
2701 out:
2702         return rc;
2703 bad:
2704         kfree(rtk);
2705         kfree(rtd);
2706         policydb_destroy(p);
2707         goto out;
2708 }
2709
2710 /*
2711  * Write a MLS level structure to a policydb binary
2712  * representation file.
2713  */
2714 static int mls_write_level(struct mls_level *l, void *fp)
2715 {
2716         __le32 buf[1];
2717         int rc;
2718
2719         buf[0] = cpu_to_le32(l->sens);
2720         rc = put_entry(buf, sizeof(u32), 1, fp);
2721         if (rc)
2722                 return rc;
2723
2724         rc = ebitmap_write(&l->cat, fp);
2725         if (rc)
2726                 return rc;
2727
2728         return 0;
2729 }
2730
2731 /*
2732  * Write a MLS range structure to a policydb binary
2733  * representation file.
2734  */
2735 static int mls_write_range_helper(struct mls_range *r, void *fp)
2736 {
2737         __le32 buf[3];
2738         size_t items;
2739         int rc, eq;
2740
2741         eq = mls_level_eq(&r->level[1], &r->level[0]);
2742
2743         if (eq)
2744                 items = 2;
2745         else
2746                 items = 3;
2747         buf[0] = cpu_to_le32(items-1);
2748         buf[1] = cpu_to_le32(r->level[0].sens);
2749         if (!eq)
2750                 buf[2] = cpu_to_le32(r->level[1].sens);
2751
2752         BUG_ON(items > ARRAY_SIZE(buf));
2753
2754         rc = put_entry(buf, sizeof(u32), items, fp);
2755         if (rc)
2756                 return rc;
2757
2758         rc = ebitmap_write(&r->level[0].cat, fp);
2759         if (rc)
2760                 return rc;
2761         if (!eq) {
2762                 rc = ebitmap_write(&r->level[1].cat, fp);
2763                 if (rc)
2764                         return rc;
2765         }
2766
2767         return 0;
2768 }
2769
2770 static int sens_write(void *vkey, void *datum, void *ptr)
2771 {
2772         char *key = vkey;
2773         struct level_datum *levdatum = datum;
2774         struct policy_data *pd = ptr;
2775         void *fp = pd->fp;
2776         __le32 buf[2];
2777         size_t len;
2778         int rc;
2779
2780         len = strlen(key);
2781         buf[0] = cpu_to_le32(len);
2782         buf[1] = cpu_to_le32(levdatum->isalias);
2783         rc = put_entry(buf, sizeof(u32), 2, fp);
2784         if (rc)
2785                 return rc;
2786
2787         rc = put_entry(key, 1, len, fp);
2788         if (rc)
2789                 return rc;
2790
2791         rc = mls_write_level(levdatum->level, fp);
2792         if (rc)
2793                 return rc;
2794
2795         return 0;
2796 }
2797
2798 static int cat_write(void *vkey, void *datum, void *ptr)
2799 {
2800         char *key = vkey;
2801         struct cat_datum *catdatum = datum;
2802         struct policy_data *pd = ptr;
2803         void *fp = pd->fp;
2804         __le32 buf[3];
2805         size_t len;
2806         int rc;
2807
2808         len = strlen(key);
2809         buf[0] = cpu_to_le32(len);
2810         buf[1] = cpu_to_le32(catdatum->value);
2811         buf[2] = cpu_to_le32(catdatum->isalias);
2812         rc = put_entry(buf, sizeof(u32), 3, fp);
2813         if (rc)
2814                 return rc;
2815
2816         rc = put_entry(key, 1, len, fp);
2817         if (rc)
2818                 return rc;
2819
2820         return 0;
2821 }
2822
2823 static int role_trans_write_one(void *key, void *datum, void *ptr)
2824 {
2825         struct role_trans_key *rtk = key;
2826         struct role_trans_datum *rtd = datum;
2827         struct policy_data *pd = ptr;
2828         void *fp = pd->fp;
2829         struct policydb *p = pd->p;
2830         __le32 buf[3];
2831         int rc;
2832
2833         buf[0] = cpu_to_le32(rtk->role);
2834         buf[1] = cpu_to_le32(rtk->type);
2835         buf[2] = cpu_to_le32(rtd->new_role);
2836         rc = put_entry(buf, sizeof(u32), 3, fp);
2837         if (rc)
2838                 return rc;
2839         if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) {
2840                 buf[0] = cpu_to_le32(rtk->tclass);
2841                 rc = put_entry(buf, sizeof(u32), 1, fp);
2842                 if (rc)
2843                         return rc;
2844         }
2845         return 0;
2846 }
2847
2848 static int role_trans_write(struct policydb *p, void *fp)
2849 {
2850         struct policy_data pd = { .p = p, .fp = fp };
2851         __le32 buf[1];
2852         int rc;
2853
2854         buf[0] = cpu_to_le32(p->role_tr.nel);
2855         rc = put_entry(buf, sizeof(u32), 1, fp);
2856         if (rc)
2857                 return rc;
2858
2859         return hashtab_map(&p->role_tr, role_trans_write_one, &pd);
2860 }
2861
2862 static int role_allow_write(struct role_allow *r, void *fp)
2863 {
2864         struct role_allow *ra;
2865         __le32 buf[2];
2866         size_t nel;
2867         int rc;
2868
2869         nel = 0;
2870         for (ra = r; ra; ra = ra->next)
2871                 nel++;
2872         buf[0] = cpu_to_le32(nel);
2873         rc = put_entry(buf, sizeof(u32), 1, fp);
2874         if (rc)
2875                 return rc;
2876         for (ra = r; ra; ra = ra->next) {
2877                 buf[0] = cpu_to_le32(ra->role);
2878                 buf[1] = cpu_to_le32(ra->new_role);
2879                 rc = put_entry(buf, sizeof(u32), 2, fp);
2880                 if (rc)
2881                         return rc;
2882         }
2883         return 0;
2884 }
2885
2886 /*
2887  * Write a security context structure
2888  * to a policydb binary representation file.
2889  */
2890 static int context_write(struct policydb *p, struct context *c,
2891                          void *fp)
2892 {
2893         int rc;
2894         __le32 buf[3];
2895
2896         buf[0] = cpu_to_le32(c->user);
2897         buf[1] = cpu_to_le32(c->role);
2898         buf[2] = cpu_to_le32(c->type);
2899
2900         rc = put_entry(buf, sizeof(u32), 3, fp);
2901         if (rc)
2902                 return rc;
2903
2904         rc = mls_write_range_helper(&c->range, fp);
2905         if (rc)
2906                 return rc;
2907
2908         return 0;
2909 }
2910
2911 /*
2912  * The following *_write functions are used to
2913  * write the symbol data to a policy database
2914  * binary representation file.
2915  */
2916
2917 static int perm_write(void *vkey, void *datum, void *fp)
2918 {
2919         char *key = vkey;
2920         struct perm_datum *perdatum = datum;
2921         __le32 buf[2];
2922         size_t len;
2923         int rc;
2924
2925         len = strlen(key);
2926         buf[0] = cpu_to_le32(len);
2927         buf[1] = cpu_to_le32(perdatum->value);
2928         rc = put_entry(buf, sizeof(u32), 2, fp);
2929         if (rc)
2930                 return rc;
2931
2932         rc = put_entry(key, 1, len, fp);
2933         if (rc)
2934                 return rc;
2935
2936         return 0;
2937 }
2938
2939 static int common_write(void *vkey, void *datum, void *ptr)
2940 {
2941         char *key = vkey;
2942         struct common_datum *comdatum = datum;
2943         struct policy_data *pd = ptr;
2944         void *fp = pd->fp;
2945         __le32 buf[4];
2946         size_t len;
2947         int rc;
2948
2949         len = strlen(key);
2950         buf[0] = cpu_to_le32(len);
2951         buf[1] = cpu_to_le32(comdatum->value);
2952         buf[2] = cpu_to_le32(comdatum->permissions.nprim);
2953         buf[3] = cpu_to_le32(comdatum->permissions.table.nel);
2954         rc = put_entry(buf, sizeof(u32), 4, fp);
2955         if (rc)
2956                 return rc;
2957
2958         rc = put_entry(key, 1, len, fp);
2959         if (rc)
2960                 return rc;
2961
2962         rc = hashtab_map(&comdatum->permissions.table, perm_write, fp);
2963         if (rc)
2964                 return rc;
2965
2966         return 0;
2967 }
2968
2969 static int type_set_write(struct type_set *t, void *fp)
2970 {
2971         int rc;
2972         __le32 buf[1];
2973
2974         if (ebitmap_write(&t->types, fp))
2975                 return -EINVAL;
2976         if (ebitmap_write(&t->negset, fp))
2977                 return -EINVAL;
2978
2979         buf[0] = cpu_to_le32(t->flags);
2980         rc = put_entry(buf, sizeof(u32), 1, fp);
2981         if (rc)
2982                 return -EINVAL;
2983
2984         return 0;
2985 }
2986
2987 static int write_cons_helper(struct policydb *p, struct constraint_node *node,
2988                              void *fp)
2989 {
2990         struct constraint_node *c;
2991         struct constraint_expr *e;
2992         __le32 buf[3];
2993         u32 nel;
2994         int rc;
2995
2996         for (c = node; c; c = c->next) {
2997                 nel = 0;
2998                 for (e = c->expr; e; e = e->next)
2999                         nel++;
3000                 buf[0] = cpu_to_le32(c->permissions);
3001                 buf[1] = cpu_to_le32(nel);
3002                 rc = put_entry(buf, sizeof(u32), 2, fp);
3003                 if (rc)
3004                         return rc;
3005                 for (e = c->expr; e; e = e->next) {
3006                         buf[0] = cpu_to_le32(e->expr_type);
3007                         buf[1] = cpu_to_le32(e->attr);
3008                         buf[2] = cpu_to_le32(e->op);
3009                         rc = put_entry(buf, sizeof(u32), 3, fp);
3010                         if (rc)
3011                                 return rc;
3012
3013                         switch (e->expr_type) {
3014                         case CEXPR_NAMES:
3015                                 rc = ebitmap_write(&e->names, fp);
3016                                 if (rc)
3017                                         return rc;
3018                                 if (p->policyvers >=
3019                                         POLICYDB_VERSION_CONSTRAINT_NAMES) {
3020                                         rc = type_set_write(e->type_names, fp);
3021                                         if (rc)
3022                                                 return rc;
3023                                 }
3024                                 break;
3025                         default:
3026                                 break;
3027                         }
3028                 }
3029         }
3030
3031         return 0;
3032 }
3033
3034 static int class_write(void *vkey, void *datum, void *ptr)
3035 {
3036         char *key = vkey;
3037         struct class_datum *cladatum = datum;
3038         struct policy_data *pd = ptr;
3039         void *fp = pd->fp;
3040         struct policydb *p = pd->p;
3041         struct constraint_node *c;
3042         __le32 buf[6];
3043         u32 ncons;
3044         size_t len, len2;
3045         int rc;
3046
3047         len = strlen(key);
3048         if (cladatum->comkey)
3049                 len2 = strlen(cladatum->comkey);
3050         else
3051                 len2 = 0;
3052
3053         ncons = 0;
3054         for (c = cladatum->constraints; c; c = c->next)
3055                 ncons++;
3056
3057         buf[0] = cpu_to_le32(len);
3058         buf[1] = cpu_to_le32(len2);
3059         buf[2] = cpu_to_le32(cladatum->value);
3060         buf[3] = cpu_to_le32(cladatum->permissions.nprim);
3061         buf[4] = cpu_to_le32(cladatum->permissions.table.nel);
3062         buf[5] = cpu_to_le32(ncons);
3063         rc = put_entry(buf, sizeof(u32), 6, fp);
3064         if (rc)
3065                 return rc;
3066
3067         rc = put_entry(key, 1, len, fp);
3068         if (rc)
3069                 return rc;
3070
3071         if (cladatum->comkey) {
3072                 rc = put_entry(cladatum->comkey, 1, len2, fp);
3073                 if (rc)
3074                         return rc;
3075         }
3076
3077         rc = hashtab_map(&cladatum->permissions.table, perm_write, fp);
3078         if (rc)
3079                 return rc;
3080
3081         rc = write_cons_helper(p, cladatum->constraints, fp);
3082         if (rc)
3083                 return rc;
3084
3085         /* write out the validatetrans rule */
3086         ncons = 0;
3087         for (c = cladatum->validatetrans; c; c = c->next)
3088                 ncons++;
3089
3090         buf[0] = cpu_to_le32(ncons);
3091         rc = put_entry(buf, sizeof(u32), 1, fp);
3092         if (rc)
3093                 return rc;
3094
3095         rc = write_cons_helper(p, cladatum->validatetrans, fp);
3096         if (rc)
3097                 return rc;
3098
3099         if (p->policyvers >= POLICYDB_VERSION_NEW_OBJECT_DEFAULTS) {
3100                 buf[0] = cpu_to_le32(cladatum->default_user);
3101                 buf[1] = cpu_to_le32(cladatum->default_role);
3102                 buf[2] = cpu_to_le32(cladatum->default_range);
3103
3104                 rc = put_entry(buf, sizeof(uint32_t), 3, fp);
3105                 if (rc)
3106                         return rc;
3107         }
3108
3109         if (p->policyvers >= POLICYDB_VERSION_DEFAULT_TYPE) {
3110                 buf[0] = cpu_to_le32(cladatum->default_type);
3111                 rc = put_entry(buf, sizeof(uint32_t), 1, fp);
3112                 if (rc)
3113                         return rc;
3114         }
3115
3116         return 0;
3117 }
3118
3119 static int role_write(void *vkey, void *datum, void *ptr)
3120 {
3121         char *key = vkey;
3122         struct role_datum *role = datum;
3123         struct policy_data *pd = ptr;
3124         void *fp = pd->fp;
3125         struct policydb *p = pd->p;
3126         __le32 buf[3];
3127         size_t items, len;
3128         int rc;
3129
3130         len = strlen(key);
3131         items = 0;
3132         buf[items++] = cpu_to_le32(len);
3133         buf[items++] = cpu_to_le32(role->value);
3134         if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
3135                 buf[items++] = cpu_to_le32(role->bounds);
3136
3137         BUG_ON(items > ARRAY_SIZE(buf));
3138
3139         rc = put_entry(buf, sizeof(u32), items, fp);
3140         if (rc)
3141                 return rc;
3142
3143         rc = put_entry(key, 1, len, fp);
3144         if (rc)
3145                 return rc;
3146
3147         rc = ebitmap_write(&role->dominates, fp);
3148         if (rc)
3149                 return rc;
3150
3151         rc = ebitmap_write(&role->types, fp);
3152         if (rc)
3153                 return rc;
3154
3155         return 0;
3156 }
3157
3158 static int type_write(void *vkey, void *datum, void *ptr)
3159 {
3160         char *key = vkey;
3161         struct type_datum *typdatum = datum;
3162         struct policy_data *pd = ptr;
3163         struct policydb *p = pd->p;
3164         void *fp = pd->fp;
3165         __le32 buf[4];
3166         int rc;
3167         size_t items, len;
3168
3169         len = strlen(key);
3170         items = 0;
3171         buf[items++] = cpu_to_le32(len);
3172         buf[items++] = cpu_to_le32(typdatum->value);
3173         if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) {
3174                 u32 properties = 0;
3175
3176                 if (typdatum->primary)
3177                         properties |= TYPEDATUM_PROPERTY_PRIMARY;
3178
3179                 if (typdatum->attribute)
3180                         properties |= TYPEDATUM_PROPERTY_ATTRIBUTE;
3181
3182                 buf[items++] = cpu_to_le32(properties);
3183                 buf[items++] = cpu_to_le32(typdatum->bounds);
3184         } else {
3185                 buf[items++] = cpu_to_le32(typdatum->primary);
3186         }
3187         BUG_ON(items > ARRAY_SIZE(buf));
3188         rc = put_entry(buf, sizeof(u32), items, fp);
3189         if (rc)
3190                 return rc;
3191
3192         rc = put_entry(key, 1, len, fp);
3193         if (rc)
3194                 return rc;
3195
3196         return 0;
3197 }
3198
3199 static int user_write(void *vkey, void *datum, void *ptr)
3200 {
3201         char *key = vkey;
3202         struct user_datum *usrdatum = datum;
3203         struct policy_data *pd = ptr;
3204         struct policydb *p = pd->p;
3205         void *fp = pd->fp;
3206         __le32 buf[3];
3207         size_t items, len;
3208         int rc;
3209
3210         len = strlen(key);
3211         items = 0;
3212         buf[items++] = cpu_to_le32(len);
3213         buf[items++] = cpu_to_le32(usrdatum->value);
3214         if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
3215                 buf[items++] = cpu_to_le32(usrdatum->bounds);
3216         BUG_ON(items > ARRAY_SIZE(buf));
3217         rc = put_entry(buf, sizeof(u32), items, fp);
3218         if (rc)
3219                 return rc;
3220
3221         rc = put_entry(key, 1, len, fp);
3222         if (rc)
3223                 return rc;
3224
3225         rc = ebitmap_write(&usrdatum->roles, fp);
3226         if (rc)
3227                 return rc;
3228
3229         rc = mls_write_range_helper(&usrdatum->range, fp);
3230         if (rc)
3231                 return rc;
3232
3233         rc = mls_write_level(&usrdatum->dfltlevel, fp);
3234         if (rc)
3235                 return rc;
3236
3237         return 0;
3238 }
3239
3240 static int (*const write_f[SYM_NUM]) (void *key, void *datum, void *datap) = {
3241         common_write,
3242         class_write,
3243         role_write,
3244         type_write,
3245         user_write,
3246         cond_write_bool,
3247         sens_write,
3248         cat_write,
3249 };
3250
3251 static int ocontext_write(struct policydb *p, const struct policydb_compat_info *info,
3252                           void *fp)
3253 {
3254         unsigned int i, j, rc;
3255         size_t nel, len;
3256         __be64 prefixbuf[1];
3257         __le32 buf[3];
3258         u32 nodebuf[8];
3259         struct ocontext *c;
3260         for (i = 0; i < info->ocon_num; i++) {
3261                 nel = 0;
3262                 for (c = p->ocontexts[i]; c; c = c->next)
3263                         nel++;
3264                 buf[0] = cpu_to_le32(nel);
3265                 rc = put_entry(buf, sizeof(u32), 1, fp);
3266                 if (rc)
3267                         return rc;
3268                 for (c = p->ocontexts[i]; c; c = c->next) {
3269                         switch (i) {
3270                         case OCON_ISID:
3271                                 buf[0] = cpu_to_le32(c->sid[0]);
3272                                 rc = put_entry(buf, sizeof(u32), 1, fp);
3273                                 if (rc)
3274                                         return rc;
3275                                 rc = context_write(p, &c->context[0], fp);
3276                                 if (rc)
3277                                         return rc;
3278                                 break;
3279                         case OCON_FS:
3280                         case OCON_NETIF:
3281                                 len = strlen(c->u.name);
3282                                 buf[0] = cpu_to_le32(len);
3283                                 rc = put_entry(buf, sizeof(u32), 1, fp);
3284                                 if (rc)
3285                                         return rc;
3286                                 rc = put_entry(c->u.name, 1, len, fp);
3287                                 if (rc)
3288                                         return rc;
3289                                 rc = context_write(p, &c->context[0], fp);
3290                                 if (rc)
3291                                         return rc;
3292                                 rc = context_write(p, &c->context[1], fp);
3293                                 if (rc)
3294                                         return rc;
3295                                 break;
3296                         case OCON_PORT:
3297                                 buf[0] = cpu_to_le32(c->u.port.protocol);
3298                                 buf[1] = cpu_to_le32(c->u.port.low_port);
3299                                 buf[2] = cpu_to_le32(c->u.port.high_port);
3300                                 rc = put_entry(buf, sizeof(u32), 3, fp);
3301                                 if (rc)
3302                                         return rc;
3303                                 rc = context_write(p, &c->context[0], fp);
3304                                 if (rc)
3305                                         return rc;
3306                                 break;
3307                         case OCON_NODE:
3308                                 nodebuf[0] = c->u.node.addr; /* network order */
3309                                 nodebuf[1] = c->u.node.mask; /* network order */
3310                                 rc = put_entry(nodebuf, sizeof(u32), 2, fp);
3311                                 if (rc)
3312                                         return rc;
3313                                 rc = context_write(p, &c->context[0], fp);
3314                                 if (rc)
3315                                         return rc;
3316                                 break;
3317                         case OCON_FSUSE:
3318                                 buf[0] = cpu_to_le32(c->v.behavior);
3319                                 len = strlen(c->u.name);
3320                                 buf[1] = cpu_to_le32(len);
3321                                 rc = put_entry(buf, sizeof(u32), 2, fp);
3322                                 if (rc)
3323                                         return rc;
3324                                 rc = put_entry(c->u.name, 1, len, fp);
3325                                 if (rc)
3326                                         return rc;
3327                                 rc = context_write(p, &c->context[0], fp);
3328                                 if (rc)
3329                                         return rc;
3330                                 break;
3331                         case OCON_NODE6:
3332                                 for (j = 0; j < 4; j++)
3333                                         nodebuf[j] = c->u.node6.addr[j]; /* network order */
3334                                 for (j = 0; j < 4; j++)
3335                                         nodebuf[j + 4] = c->u.node6.mask[j]; /* network order */
3336                                 rc = put_entry(nodebuf, sizeof(u32), 8, fp);
3337                                 if (rc)
3338                                         return rc;
3339                                 rc = context_write(p, &c->context[0], fp);
3340                                 if (rc)
3341                                         return rc;
3342                                 break;
3343                         case OCON_IBPKEY:
3344                                 /* subnet_prefix is in CPU order */
3345                                 prefixbuf[0] = cpu_to_be64(c->u.ibpkey.subnet_prefix);
3346
3347                                 rc = put_entry(prefixbuf, sizeof(u64), 1, fp);
3348                                 if (rc)
3349                                         return rc;
3350
3351                                 buf[0] = cpu_to_le32(c->u.ibpkey.low_pkey);
3352                                 buf[1] = cpu_to_le32(c->u.ibpkey.high_pkey);
3353
3354                                 rc = put_entry(buf, sizeof(u32), 2, fp);
3355                                 if (rc)
3356                                         return rc;
3357                                 rc = context_write(p, &c->context[0], fp);
3358                                 if (rc)
3359                                         return rc;
3360                                 break;
3361                         case OCON_IBENDPORT:
3362                                 len = strlen(c->u.ibendport.dev_name);
3363                                 buf[0] = cpu_to_le32(len);
3364                                 buf[1] = cpu_to_le32(c->u.ibendport.port);
3365                                 rc = put_entry(buf, sizeof(u32), 2, fp);
3366                                 if (rc)
3367                                         return rc;
3368                                 rc = put_entry(c->u.ibendport.dev_name, 1, len, fp);
3369                                 if (rc)
3370                                         return rc;
3371                                 rc = context_write(p, &c->context[0], fp);
3372                                 if (rc)
3373                                         return rc;
3374                                 break;
3375                         }
3376                 }
3377         }
3378         return 0;
3379 }
3380
3381 static int genfs_write(struct policydb *p, void *fp)
3382 {
3383         struct genfs *genfs;
3384         struct ocontext *c;
3385         size_t len;
3386         __le32 buf[1];
3387         int rc;
3388
3389         len = 0;
3390         for (genfs = p->genfs; genfs; genfs = genfs->next)
3391                 len++;
3392         buf[0] = cpu_to_le32(len);
3393         rc = put_entry(buf, sizeof(u32), 1, fp);
3394         if (rc)
3395                 return rc;
3396         for (genfs = p->genfs; genfs; genfs = genfs->next) {
3397                 len = strlen(genfs->fstype);
3398                 buf[0] = cpu_to_le32(len);
3399                 rc = put_entry(buf, sizeof(u32), 1, fp);
3400                 if (rc)
3401                         return rc;
3402                 rc = put_entry(genfs->fstype, 1, len, fp);
3403                 if (rc)
3404                         return rc;
3405                 len = 0;
3406                 for (c = genfs->head; c; c = c->next)
3407                         len++;
3408                 buf[0] = cpu_to_le32(len);
3409                 rc = put_entry(buf, sizeof(u32), 1, fp);
3410                 if (rc)
3411                         return rc;
3412                 for (c = genfs->head; c; c = c->next) {
3413                         len = strlen(c->u.name);
3414                         buf[0] = cpu_to_le32(len);
3415                         rc = put_entry(buf, sizeof(u32), 1, fp);
3416                         if (rc)
3417                                 return rc;
3418                         rc = put_entry(c->u.name, 1, len, fp);
3419                         if (rc)
3420                                 return rc;
3421                         buf[0] = cpu_to_le32(c->v.sclass);
3422                         rc = put_entry(buf, sizeof(u32), 1, fp);
3423                         if (rc)
3424                                 return rc;
3425                         rc = context_write(p, &c->context[0], fp);
3426                         if (rc)
3427                                 return rc;
3428                 }
3429         }
3430         return 0;
3431 }
3432
3433 static int range_write_helper(void *key, void *data, void *ptr)
3434 {
3435         __le32 buf[2];
3436         struct range_trans *rt = key;
3437         struct mls_range *r = data;
3438         struct policy_data *pd = ptr;
3439         void *fp = pd->fp;
3440         struct policydb *p = pd->p;
3441         int rc;
3442
3443         buf[0] = cpu_to_le32(rt->source_type);
3444         buf[1] = cpu_to_le32(rt->target_type);
3445         rc = put_entry(buf, sizeof(u32), 2, fp);
3446         if (rc)
3447                 return rc;
3448         if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) {
3449                 buf[0] = cpu_to_le32(rt->target_class);
3450                 rc = put_entry(buf, sizeof(u32), 1, fp);
3451                 if (rc)
3452                         return rc;
3453         }
3454         rc = mls_write_range_helper(r, fp);
3455         if (rc)
3456                 return rc;
3457
3458         return 0;
3459 }
3460
3461 static int range_write(struct policydb *p, void *fp)
3462 {
3463         __le32 buf[1];
3464         int rc;
3465         struct policy_data pd;
3466
3467         pd.p = p;
3468         pd.fp = fp;
3469
3470         buf[0] = cpu_to_le32(p->range_tr.nel);
3471         rc = put_entry(buf, sizeof(u32), 1, fp);
3472         if (rc)
3473                 return rc;
3474
3475         /* actually write all of the entries */
3476         rc = hashtab_map(&p->range_tr, range_write_helper, &pd);
3477         if (rc)
3478                 return rc;
3479
3480         return 0;
3481 }
3482
3483 static int filename_write_helper_compat(void *key, void *data, void *ptr)
3484 {
3485         struct filename_trans_key *ft = key;
3486         struct filename_trans_datum *datum = data;
3487         struct ebitmap_node *node;
3488         void *fp = ptr;
3489         __le32 buf[4];
3490         int rc;
3491         u32 bit, len = strlen(ft->name);
3492
3493         do {
3494                 ebitmap_for_each_positive_bit(&datum->stypes, node, bit) {
3495                         buf[0] = cpu_to_le32(len);
3496                         rc = put_entry(buf, sizeof(u32), 1, fp);
3497                         if (rc)
3498                                 return rc;
3499
3500                         rc = put_entry(ft->name, sizeof(char), len, fp);
3501                         if (rc)
3502                                 return rc;
3503
3504                         buf[0] = cpu_to_le32(bit + 1);
3505                         buf[1] = cpu_to_le32(ft->ttype);
3506                         buf[2] = cpu_to_le32(ft->tclass);
3507                         buf[3] = cpu_to_le32(datum->otype);
3508
3509                         rc = put_entry(buf, sizeof(u32), 4, fp);
3510                         if (rc)
3511                                 return rc;
3512                 }
3513
3514                 datum = datum->next;
3515         } while (unlikely(datum));
3516
3517         return 0;
3518 }
3519
3520 static int filename_write_helper(void *key, void *data, void *ptr)
3521 {
3522         struct filename_trans_key *ft = key;
3523         struct filename_trans_datum *datum;
3524         void *fp = ptr;
3525         __le32 buf[3];
3526         int rc;
3527         u32 ndatum, len = strlen(ft->name);
3528
3529         buf[0] = cpu_to_le32(len);
3530         rc = put_entry(buf, sizeof(u32), 1, fp);
3531         if (rc)
3532                 return rc;
3533
3534         rc = put_entry(ft->name, sizeof(char), len, fp);
3535         if (rc)
3536                 return rc;
3537
3538         ndatum = 0;
3539         datum = data;
3540         do {
3541                 ndatum++;
3542                 datum = datum->next;
3543         } while (unlikely(datum));
3544
3545         buf[0] = cpu_to_le32(ft->ttype);
3546         buf[1] = cpu_to_le32(ft->tclass);
3547         buf[2] = cpu_to_le32(ndatum);
3548         rc = put_entry(buf, sizeof(u32), 3, fp);
3549         if (rc)
3550                 return rc;
3551
3552         datum = data;
3553         do {
3554                 rc = ebitmap_write(&datum->stypes, fp);
3555                 if (rc)
3556                         return rc;
3557
3558                 buf[0] = cpu_to_le32(datum->otype);
3559                 rc = put_entry(buf, sizeof(u32), 1, fp);
3560                 if (rc)
3561                         return rc;
3562
3563                 datum = datum->next;
3564         } while (unlikely(datum));
3565
3566         return 0;
3567 }
3568
3569 static int filename_trans_write(struct policydb *p, void *fp)
3570 {
3571         __le32 buf[1];
3572         int rc;
3573
3574         if (p->policyvers < POLICYDB_VERSION_FILENAME_TRANS)
3575                 return 0;
3576
3577         if (p->policyvers < POLICYDB_VERSION_COMP_FTRANS) {
3578                 buf[0] = cpu_to_le32(p->compat_filename_trans_count);
3579                 rc = put_entry(buf, sizeof(u32), 1, fp);
3580                 if (rc)
3581                         return rc;
3582
3583                 rc = hashtab_map(&p->filename_trans,
3584                                  filename_write_helper_compat, fp);
3585         } else {
3586                 buf[0] = cpu_to_le32(p->filename_trans.nel);
3587                 rc = put_entry(buf, sizeof(u32), 1, fp);
3588                 if (rc)
3589                         return rc;
3590
3591                 rc = hashtab_map(&p->filename_trans, filename_write_helper, fp);
3592         }
3593         return rc;
3594 }
3595
3596 /*
3597  * Write the configuration data in a policy database
3598  * structure to a policy database binary representation
3599  * file.
3600  */
3601 int policydb_write(struct policydb *p, void *fp)
3602 {
3603         unsigned int i, num_syms;
3604         int rc;
3605         __le32 buf[4];
3606         u32 config;
3607         size_t len;
3608         const struct policydb_compat_info *info;
3609
3610         /*
3611          * refuse to write policy older than compressed avtab
3612          * to simplify the writer.  There are other tests dropped
3613          * since we assume this throughout the writer code.  Be
3614          * careful if you ever try to remove this restriction
3615          */
3616         if (p->policyvers < POLICYDB_VERSION_AVTAB) {
3617                 pr_err("SELinux: refusing to write policy version %d."
3618                        "  Because it is less than version %d\n", p->policyvers,
3619                        POLICYDB_VERSION_AVTAB);
3620                 return -EINVAL;
3621         }
3622
3623         config = 0;
3624         if (p->mls_enabled)
3625                 config |= POLICYDB_CONFIG_MLS;
3626
3627         if (p->reject_unknown)
3628                 config |= REJECT_UNKNOWN;
3629         if (p->allow_unknown)
3630                 config |= ALLOW_UNKNOWN;
3631
3632         /* Write the magic number and string identifiers. */
3633         buf[0] = cpu_to_le32(POLICYDB_MAGIC);
3634         len = strlen(POLICYDB_STRING);
3635         buf[1] = cpu_to_le32(len);
3636         rc = put_entry(buf, sizeof(u32), 2, fp);
3637         if (rc)
3638                 return rc;
3639         rc = put_entry(POLICYDB_STRING, 1, len, fp);
3640         if (rc)
3641                 return rc;
3642
3643         /* Write the version, config, and table sizes. */
3644         info = policydb_lookup_compat(p->policyvers);
3645         if (!info) {
3646                 pr_err("SELinux: compatibility lookup failed for policy "
3647                     "version %d", p->policyvers);
3648                 return -EINVAL;
3649         }
3650
3651         buf[0] = cpu_to_le32(p->policyvers);
3652         buf[1] = cpu_to_le32(config);
3653         buf[2] = cpu_to_le32(info->sym_num);
3654         buf[3] = cpu_to_le32(info->ocon_num);
3655
3656         rc = put_entry(buf, sizeof(u32), 4, fp);
3657         if (rc)
3658                 return rc;
3659
3660         if (p->policyvers >= POLICYDB_VERSION_POLCAP) {
3661                 rc = ebitmap_write(&p->policycaps, fp);
3662                 if (rc)
3663                         return rc;
3664         }
3665
3666         if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE) {
3667                 rc = ebitmap_write(&p->permissive_map, fp);
3668                 if (rc)
3669                         return rc;
3670         }
3671
3672         num_syms = info->sym_num;
3673         for (i = 0; i < num_syms; i++) {
3674                 struct policy_data pd;
3675
3676                 pd.fp = fp;
3677                 pd.p = p;
3678
3679                 buf[0] = cpu_to_le32(p->symtab[i].nprim);
3680                 buf[1] = cpu_to_le32(p->symtab[i].table.nel);
3681
3682                 rc = put_entry(buf, sizeof(u32), 2, fp);
3683                 if (rc)
3684                         return rc;
3685                 rc = hashtab_map(&p->symtab[i].table, write_f[i], &pd);
3686                 if (rc)
3687                         return rc;
3688         }
3689
3690         rc = avtab_write(p, &p->te_avtab, fp);
3691         if (rc)
3692                 return rc;
3693
3694         rc = cond_write_list(p, fp);
3695         if (rc)
3696                 return rc;
3697
3698         rc = role_trans_write(p, fp);
3699         if (rc)
3700                 return rc;
3701
3702         rc = role_allow_write(p->role_allow, fp);
3703         if (rc)
3704                 return rc;
3705
3706         rc = filename_trans_write(p, fp);
3707         if (rc)
3708                 return rc;
3709
3710         rc = ocontext_write(p, info, fp);
3711         if (rc)
3712                 return rc;
3713
3714         rc = genfs_write(p, fp);
3715         if (rc)
3716                 return rc;
3717
3718         rc = range_write(p, fp);
3719         if (rc)
3720                 return rc;
3721
3722         for (i = 0; i < p->p_types.nprim; i++) {
3723                 struct ebitmap *e = &p->type_attr_map_array[i];
3724
3725                 rc = ebitmap_write(e, fp);
3726                 if (rc)
3727                         return rc;
3728         }
3729
3730         return 0;
3731 }