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, <sds@tycho.nsa.gov>
   6  */
   7
   8 /*
   9  * Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com>
  10  *
  11  *      Support for enhanced MLS infrastructure.
  12  *
  13  * Updated: Frank Mayer <mayerf@tresys.com> and Karl MacMillan <kmacmillan@tresys.com>
  14  *
  15  *      Added conditional policy language extensions
  16  *
  17  * Updated: Hewlett-Packard <paul@paul-moore.com>
  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 #define _DEBUG_HASHES
  45
  46 #ifdef DEBUG_HASHES
  47 static const char *symtab_name[SYM_NUM] = {
  48         "common prefixes",
  49         "classes",
  50         "roles",
  51         "types",
  52         "users",
  53         "bools",
  54         "levels",
  55         "categories",
  56 };
  57 #endif
  58
  59 struct policydb_compat_info {
  60         int version;
  61         int sym_num;
  62         int ocon_num;
  63 };
  64
  65 /* These need to be updated if SYM_NUM or OCON_NUM changes */
  66 static struct policydb_compat_info policydb_compat[] = {
  67         {
  68                 .version        = POLICYDB_VERSION_BASE,
  69                 .sym_num        = SYM_NUM - 3,
  70                 .ocon_num       = OCON_NUM - 3,
  71         },
  72         {
  73                 .version        = POLICYDB_VERSION_BOOL,
  74                 .sym_num        = SYM_NUM - 2,
  75                 .ocon_num       = OCON_NUM - 3,
  76         },
  77         {
  78                 .version        = POLICYDB_VERSION_IPV6,
  79                 .sym_num        = SYM_NUM - 2,
  80                 .ocon_num       = OCON_NUM - 2,
  81         },
  82         {
  83                 .version        = POLICYDB_VERSION_NLCLASS,
  84                 .sym_num        = SYM_NUM - 2,
  85                 .ocon_num       = OCON_NUM - 2,
  86         },
  87         {
  88                 .version        = POLICYDB_VERSION_MLS,
  89                 .sym_num        = SYM_NUM,
  90                 .ocon_num       = OCON_NUM - 2,
  91         },
  92         {
  93                 .version        = POLICYDB_VERSION_AVTAB,
  94                 .sym_num        = SYM_NUM,
  95                 .ocon_num       = OCON_NUM - 2,
  96         },
  97         {
  98                 .version        = POLICYDB_VERSION_RANGETRANS,
  99                 .sym_num        = SYM_NUM,
 100                 .ocon_num       = OCON_NUM - 2,
 101         },
 102         {
 103                 .version        = POLICYDB_VERSION_POLCAP,
 104                 .sym_num        = SYM_NUM,
 105                 .ocon_num       = OCON_NUM - 2,
 106         },
 107         {
 108                 .version        = POLICYDB_VERSION_PERMISSIVE,
 109                 .sym_num        = SYM_NUM,
 110                 .ocon_num       = OCON_NUM - 2,
 111         },
 112         {
 113                 .version        = POLICYDB_VERSION_BOUNDARY,
 114                 .sym_num        = SYM_NUM,
 115                 .ocon_num       = OCON_NUM - 2,
 116         },
 117         {
 118                 .version        = POLICYDB_VERSION_FILENAME_TRANS,
 119                 .sym_num        = SYM_NUM,
 120                 .ocon_num       = OCON_NUM - 2,
 121         },
 122         {
 123                 .version        = POLICYDB_VERSION_ROLETRANS,
 124                 .sym_num        = SYM_NUM,
 125                 .ocon_num       = OCON_NUM - 2,
 126         },
 127         {
 128                 .version        = POLICYDB_VERSION_NEW_OBJECT_DEFAULTS,
 129                 .sym_num        = SYM_NUM,
 130                 .ocon_num       = OCON_NUM - 2,
 131         },
 132         {
 133                 .version        = POLICYDB_VERSION_DEFAULT_TYPE,
 134                 .sym_num        = SYM_NUM,
 135                 .ocon_num       = OCON_NUM - 2,
 136         },
 137         {
 138                 .version        = POLICYDB_VERSION_CONSTRAINT_NAMES,
 139                 .sym_num        = SYM_NUM,
 140                 .ocon_num       = OCON_NUM - 2,
 141         },
 142         {
 143                 .version        = POLICYDB_VERSION_XPERMS_IOCTL,
 144                 .sym_num        = SYM_NUM,
 145                 .ocon_num       = OCON_NUM - 2,
 146         },
 147         {
 148                 .version        = POLICYDB_VERSION_INFINIBAND,
 149                 .sym_num        = SYM_NUM,
 150                 .ocon_num       = OCON_NUM,
 151         },
 152         {
 153                 .version        = POLICYDB_VERSION_GLBLUB,
 154                 .sym_num        = SYM_NUM,
 155                 .ocon_num       = OCON_NUM,
 156         },
 157         {
 158                 .version        = POLICYDB_VERSION_COMP_FTRANS,
 159                 .sym_num        = SYM_NUM,
 160                 .ocon_num       = OCON_NUM,
 161         },
 162 };
 163
 164 static struct policydb_compat_info *policydb_lookup_compat(int version)
 165 {
 166         int i;
 167         struct policydb_compat_info *info = NULL;
 168
 169         for (i = 0; i < ARRAY_SIZE(policydb_compat); i++) {
 170                 if (policydb_compat[i].version == version) {
 171                         info = &policydb_compat[i];
 172                         break;
 173                 }
 174         }
 175         return info;
 176 }
 177
 178 /*
 179  * The following *_destroy functions are used to
 180  * free any memory allocated for each kind of
 181  * symbol data in the policy database.
 182  */
 183
 184 static int perm_destroy(void *key, void *datum, void *p)
 185 {
 186         kfree(key);
 187         kfree(datum);
 188         return 0;
 189 }
 190
 191 static int common_destroy(void *key, void *datum, void *p)
 192 {
 193         struct common_datum *comdatum;
 194
 195         kfree(key);
 196         if (datum) {
 197                 comdatum = datum;
 198                 hashtab_map(&comdatum->permissions.table, perm_destroy, NULL);
 199                 hashtab_destroy(&comdatum->permissions.table);
 200         }
 201         kfree(datum);
 202         return 0;
 203 }
 204
 205 static void constraint_expr_destroy(struct constraint_expr *expr)
 206 {
 207         if (expr) {
 208                 ebitmap_destroy(&expr->names);
 209                 if (expr->type_names) {
 210                         ebitmap_destroy(&expr->type_names->types);
 211                         ebitmap_destroy(&expr->type_names->negset);
 212                         kfree(expr->type_names);
 213                 }
 214                 kfree(expr);
 215         }
 216 }
 217
 218 static int cls_destroy(void *key, void *datum, void *p)
 219 {
 220         struct class_datum *cladatum;
 221         struct constraint_node *constraint, *ctemp;
 222         struct constraint_expr *e, *etmp;
 223
 224         kfree(key);
 225         if (datum) {
 226                 cladatum = datum;
 227                 hashtab_map(&cladatum->permissions.table, perm_destroy, NULL);
 228                 hashtab_destroy(&cladatum->permissions.table);
 229                 constraint = cladatum->constraints;
 230                 while (constraint) {
 231                         e = constraint->expr;
 232                         while (e) {
 233                                 etmp = e;
 234                                 e = e->next;
 235                                 constraint_expr_destroy(etmp);
 236                         }
 237                         ctemp = constraint;
 238                         constraint = constraint->next;
 239                         kfree(ctemp);
 240                 }
 241
 242                 constraint = cladatum->validatetrans;
 243                 while (constraint) {
 244                         e = constraint->expr;
 245                         while (e) {
 246                                 etmp = e;
 247                                 e = e->next;
 248                                 constraint_expr_destroy(etmp);
 249                         }
 250                         ctemp = constraint;
 251                         constraint = constraint->next;
 252                         kfree(ctemp);
 253                 }
 254                 kfree(cladatum->comkey);
 255         }
 256         kfree(datum);
 257         return 0;
 258 }
 259
 260 static int role_destroy(void *key, void *datum, void *p)
 261 {
 262         struct role_datum *role;
 263
 264         kfree(key);
 265         if (datum) {
 266                 role = datum;
 267                 ebitmap_destroy(&role->dominates);
 268                 ebitmap_destroy(&role->types);
 269         }
 270         kfree(datum);
 271         return 0;
 272 }
 273
 274 static int type_destroy(void *key, void *datum, void *p)
 275 {
 276         kfree(key);
 277         kfree(datum);
 278         return 0;
 279 }
 280
 281 static int user_destroy(void *key, void *datum, void *p)
 282 {
 283         struct user_datum *usrdatum;
 284
 285         kfree(key);
 286         if (datum) {
 287                 usrdatum = datum;
 288                 ebitmap_destroy(&usrdatum->roles);
 289                 ebitmap_destroy(&usrdatum->range.level[0].cat);
 290                 ebitmap_destroy(&usrdatum->range.level[1].cat);
 291                 ebitmap_destroy(&usrdatum->dfltlevel.cat);
 292         }
 293         kfree(datum);
 294         return 0;
 295 }
 296
 297 static int sens_destroy(void *key, void *datum, void *p)
 298 {
 299         struct level_datum *levdatum;
 300
 301         kfree(key);
 302         if (datum) {
 303                 levdatum = datum;
 304                 if (levdatum->level)
 305                         ebitmap_destroy(&levdatum->level->cat);
 306                 kfree(levdatum->level);
 307         }
 308         kfree(datum);
 309         return 0;
 310 }
 311
 312 static int cat_destroy(void *key, void *datum, void *p)
 313 {
 314         kfree(key);
 315         kfree(datum);
 316         return 0;
 317 }
 318
 319 static int (*destroy_f[SYM_NUM]) (void *key, void *datum, void *datap) =
 320 {
 321         common_destroy,
 322         cls_destroy,
 323         role_destroy,
 324         type_destroy,
 325         user_destroy,
 326         cond_destroy_bool,
 327         sens_destroy,
 328         cat_destroy,
 329 };
 330
 331 static int filenametr_destroy(void *key, void *datum, void *p)
 332 {
 333         struct filename_trans_key *ft = key;
 334         struct filename_trans_datum *next, *d = datum;
 335
 336         kfree(ft->name);
 337         kfree(key);
 338         do {
 339                 ebitmap_destroy(&d->stypes);
 340                 next = d->next;
 341                 kfree(d);
 342                 d = next;
 343         } while (unlikely(d));
 344         cond_resched();
 345         return 0;
 346 }
 347
 348 static int range_tr_destroy(void *key, void *datum, void *p)
 349 {
 350         struct mls_range *rt = datum;
 351
 352         kfree(key);
 353         ebitmap_destroy(&rt->level[0].cat);
 354         ebitmap_destroy(&rt->level[1].cat);
 355         kfree(datum);
 356         cond_resched();
 357         return 0;
 358 }
 359
 360 static int role_tr_destroy(void *key, void *datum, void *p)
 361 {
 362         kfree(key);
 363         kfree(datum);
 364         return 0;
 365 }
 366
 367 static void ocontext_destroy(struct ocontext *c, int i)
 368 {
 369         if (!c)
 370                 return;
 371
 372         context_destroy(&c->context[0]);
 373         context_destroy(&c->context[1]);
 374         if (i == OCON_ISID || i == OCON_FS ||
 375             i == OCON_NETIF || i == OCON_FSUSE)
 376                 kfree(c->u.name);
 377         kfree(c);
 378 }
 379
 380 /*
 381  * Initialize the role table.
 382  */
 383 static int roles_init(struct policydb *p)
 384 {
 385         char *key = NULL;
 386         int rc;
 387         struct role_datum *role;
 388
 389         role = kzalloc(sizeof(*role), GFP_KERNEL);
 390         if (!role)
 391                 return -ENOMEM;
 392
 393         rc = -EINVAL;
 394         role->value = ++p->p_roles.nprim;
 395         if (role->value != OBJECT_R_VAL)
 396                 goto out;
 397
 398         rc = -ENOMEM;
 399         key = kstrdup(OBJECT_R, GFP_KERNEL);
 400         if (!key)
 401                 goto out;
 402
 403         rc = symtab_insert(&p->p_roles, key, role);
 404         if (rc)
 405                 goto out;
 406
 407         return 0;
 408 out:
 409         kfree(key);
 410         kfree(role);
 411         return rc;
 412 }
 413
 414 static u32 filenametr_hash(const void *k)
 415 {
 416         const struct filename_trans_key *ft = k;
 417         unsigned long hash;
 418         unsigned int byte_num;
 419         unsigned char focus;
 420
 421         hash = ft->ttype ^ ft->tclass;
 422
 423         byte_num = 0;
 424         while ((focus = ft->name[byte_num++]))
 425                 hash = partial_name_hash(focus, hash);
 426         return hash;
 427 }
 428
 429 static int filenametr_cmp(const void *k1, const void *k2)
 430 {
 431         const struct filename_trans_key *ft1 = k1;
 432         const struct filename_trans_key *ft2 = k2;
 433         int v;
 434
 435         v = ft1->ttype - ft2->ttype;
 436         if (v)
 437                 return v;
 438
 439         v = ft1->tclass - ft2->tclass;
 440         if (v)
 441                 return v;
 442
 443         return strcmp(ft1->name, ft2->name);
 444
 445 }
 446
 447 static const struct hashtab_key_params filenametr_key_params = {
 448         .hash = filenametr_hash,
 449         .cmp = filenametr_cmp,
 450 };
 451
 452 struct filename_trans_datum *policydb_filenametr_search(
 453         struct policydb *p, struct filename_trans_key *key)
 454 {
 455         return hashtab_search(&p->filename_trans, key, filenametr_key_params);
 456 }
 457
 458 static u32 rangetr_hash(const void *k)
 459 {
 460         const struct range_trans *key = k;
 461
 462         return key->source_type + (key->target_type << 3) +
 463                 (key->target_class << 5);
 464 }
 465
 466 static int rangetr_cmp(const void *k1, const void *k2)
 467 {
 468         const struct range_trans *key1 = k1, *key2 = k2;
 469         int v;
 470
 471         v = key1->source_type - key2->source_type;
 472         if (v)
 473                 return v;
 474
 475         v = key1->target_type - key2->target_type;
 476         if (v)
 477                 return v;
 478
 479         v = key1->target_class - key2->target_class;
 480
 481         return v;
 482 }
 483
 484 static const struct hashtab_key_params rangetr_key_params = {
 485         .hash = rangetr_hash,
 486         .cmp = rangetr_cmp,
 487 };
 488
 489 struct mls_range *policydb_rangetr_search(struct policydb *p,
 490                                           struct range_trans *key)
 491 {
 492         return hashtab_search(&p->range_tr, key, rangetr_key_params);
 493 }
 494
 495 static u32 role_trans_hash(const void *k)
 496 {
 497         const struct role_trans_key *key = k;
 498
 499         return key->role + (key->type << 3) + (key->tclass << 5);
 500 }
 501
 502 static int role_trans_cmp(const void *k1, const void *k2)
 503 {
 504         const struct role_trans_key *key1 = k1, *key2 = k2;
 505         int v;
 506
 507         v = key1->role - key2->role;
 508         if (v)
 509                 return v;
 510
 511         v = key1->type - key2->type;
 512         if (v)
 513                 return v;
 514
 515         return key1->tclass - key2->tclass;
 516 }
 517
 518 static const struct hashtab_key_params roletr_key_params = {
 519         .hash = role_trans_hash,
 520         .cmp = role_trans_cmp,
 521 };
 522
 523 struct role_trans_datum *policydb_roletr_search(struct policydb *p,
 524                                                 struct role_trans_key *key)
 525 {
 526         return hashtab_search(&p->role_tr, key, roletr_key_params);
 527 }
 528
 529 /*
 530  * Initialize a policy database structure.
 531  */
 532 static void policydb_init(struct policydb *p)
 533 {
 534         memset(p, 0, sizeof(*p));
 535
 536         avtab_init(&p->te_avtab);
 537         cond_policydb_init(p);
 538
 539         ebitmap_init(&p->filename_trans_ttypes);
 540         ebitmap_init(&p->policycaps);
 541         ebitmap_init(&p->permissive_map);
 542 }
 543
 544 /*
 545  * The following *_index functions are used to
 546  * define the val_to_name and val_to_struct arrays
 547  * in a policy database structure.  The val_to_name
 548  * arrays are used when converting security context
 549  * structures into string representations.  The
 550  * val_to_struct arrays are used when the attributes
 551  * of a class, role, or user are needed.
 552  */
 553
 554 static int common_index(void *key, void *datum, void *datap)
 555 {
 556         struct policydb *p;
 557         struct common_datum *comdatum;
 558
 559         comdatum = datum;
 560         p = datap;
 561         if (!comdatum->value || comdatum->value > p->p_commons.nprim)
 562                 return -EINVAL;
 563
 564         p->sym_val_to_name[SYM_COMMONS][comdatum->value - 1] = key;
 565
 566         return 0;
 567 }
 568
 569 static int class_index(void *key, void *datum, void *datap)
 570 {
 571         struct policydb *p;
 572         struct class_datum *cladatum;
 573
 574         cladatum = datum;
 575         p = datap;
 576         if (!cladatum->value || cladatum->value > p->p_classes.nprim)
 577                 return -EINVAL;
 578
 579         p->sym_val_to_name[SYM_CLASSES][cladatum->value - 1] = key;
 580         p->class_val_to_struct[cladatum->value - 1] = cladatum;
 581         return 0;
 582 }
 583
 584 static int role_index(void *key, void *datum, void *datap)
 585 {
 586         struct policydb *p;
 587         struct role_datum *role;
 588
 589         role = datum;
 590         p = datap;
 591         if (!role->value
 592             || role->value > p->p_roles.nprim
 593             || role->bounds > p->p_roles.nprim)
 594                 return -EINVAL;
 595
 596         p->sym_val_to_name[SYM_ROLES][role->value - 1] = key;
 597         p->role_val_to_struct[role->value - 1] = role;
 598         return 0;
 599 }
 600
 601 static int type_index(void *key, void *datum, void *datap)
 602 {
 603         struct policydb *p;
 604         struct type_datum *typdatum;
 605
 606         typdatum = datum;
 607         p = datap;
 608
 609         if (typdatum->primary) {
 610                 if (!typdatum->value
 611                     || typdatum->value > p->p_types.nprim
 612                     || typdatum->bounds > p->p_types.nprim)
 613                         return -EINVAL;
 614                 p->sym_val_to_name[SYM_TYPES][typdatum->value - 1] = key;
 615                 p->type_val_to_struct[typdatum->value - 1] = typdatum;
 616         }
 617
 618         return 0;
 619 }
 620
 621 static int user_index(void *key, void *datum, void *datap)
 622 {
 623         struct policydb *p;
 624         struct user_datum *usrdatum;
 625
 626         usrdatum = datum;
 627         p = datap;
 628         if (!usrdatum->value
 629             || usrdatum->value > p->p_users.nprim
 630             || usrdatum->bounds > p->p_users.nprim)
 631                 return -EINVAL;
 632
 633         p->sym_val_to_name[SYM_USERS][usrdatum->value - 1] = key;
 634         p->user_val_to_struct[usrdatum->value - 1] = usrdatum;
 635         return 0;
 636 }
 637
 638 static int sens_index(void *key, void *datum, void *datap)
 639 {
 640         struct policydb *p;
 641         struct level_datum *levdatum;
 642
 643         levdatum = datum;
 644         p = datap;
 645
 646         if (!levdatum->isalias) {
 647                 if (!levdatum->level->sens ||
 648                     levdatum->level->sens > p->p_levels.nprim)
 649                         return -EINVAL;
 650
 651                 p->sym_val_to_name[SYM_LEVELS][levdatum->level->sens - 1] = key;
 652         }
 653
 654         return 0;
 655 }
 656
 657 static int cat_index(void *key, void *datum, void *datap)
 658 {
 659         struct policydb *p;
 660         struct cat_datum *catdatum;
 661
 662         catdatum = datum;
 663         p = datap;
 664
 665         if (!catdatum->isalias) {
 666                 if (!catdatum->value || catdatum->value > p->p_cats.nprim)
 667                         return -EINVAL;
 668
 669                 p->sym_val_to_name[SYM_CATS][catdatum->value - 1] = key;
 670         }
 671
 672         return 0;
 673 }
 674
 675 static int (*index_f[SYM_NUM]) (void *key, void *datum, void *datap) =
 676 {
 677         common_index,
 678         class_index,
 679         role_index,
 680         type_index,
 681         user_index,
 682         cond_index_bool,
 683         sens_index,
 684         cat_index,
 685 };
 686
 687 #ifdef DEBUG_HASHES
 688 static void hash_eval(struct hashtab *h, const char *hash_name)
 689 {
 690         struct hashtab_info info;
 691
 692         hashtab_stat(h, &info);
 693         pr_debug("SELinux: %s:  %d entries and %d/%d buckets used, longest chain length %d\n",
 694                  hash_name, h->nel, info.slots_used, h->size,
 695                  info.max_chain_len);
 696 }
 697
 698 static void symtab_hash_eval(struct symtab *s)
 699 {
 700         int i;
 701
 702         for (i = 0; i < SYM_NUM; i++)
 703                 hash_eval(&s[i].table, symtab_name[i]);
 704 }
 705
 706 #else
 707 static inline void hash_eval(struct hashtab *h, char *hash_name)
 708 {
 709 }
 710 #endif
 711
 712 /*
 713  * Define the other val_to_name and val_to_struct arrays
 714  * in a policy database structure.
 715  *
 716  * Caller must clean up on failure.
 717  */
 718 static int policydb_index(struct policydb *p)
 719 {
 720         int i, rc;
 721
 722         if (p->mls_enabled)
 723                 pr_debug("SELinux:  %d users, %d roles, %d types, %d bools, %d sens, %d cats\n",
 724                          p->p_users.nprim, p->p_roles.nprim, p->p_types.nprim,
 725                          p->p_bools.nprim, p->p_levels.nprim, p->p_cats.nprim);
 726         else
 727                 pr_debug("SELinux:  %d users, %d roles, %d types, %d bools\n",
 728                          p->p_users.nprim, p->p_roles.nprim, p->p_types.nprim,
 729                          p->p_bools.nprim);
 730
 731         pr_debug("SELinux:  %d classes, %d rules\n",
 732                  p->p_classes.nprim, p->te_avtab.nel);
 733
 734 #ifdef DEBUG_HASHES
 735         avtab_hash_eval(&p->te_avtab, "rules");
 736         symtab_hash_eval(p->symtab);
 737 #endif
 738
 739         p->class_val_to_struct = kcalloc(p->p_classes.nprim,
 740                                          sizeof(*p->class_val_to_struct),
 741                                          GFP_KERNEL);
 742         if (!p->class_val_to_struct)
 743                 return -ENOMEM;
 744
 745         p->role_val_to_struct = kcalloc(p->p_roles.nprim,
 746                                         sizeof(*p->role_val_to_struct),
 747                                         GFP_KERNEL);
 748         if (!p->role_val_to_struct)
 749                 return -ENOMEM;
 750
 751         p->user_val_to_struct = kcalloc(p->p_users.nprim,
 752                                         sizeof(*p->user_val_to_struct),
 753                                         GFP_KERNEL);
 754         if (!p->user_val_to_struct)
 755                 return -ENOMEM;
 756
 757         p->type_val_to_struct = kvcalloc(p->p_types.nprim,
 758                                          sizeof(*p->type_val_to_struct),
 759                                          GFP_KERNEL);
 760         if (!p->type_val_to_struct)
 761                 return -ENOMEM;
 762
 763         rc = cond_init_bool_indexes(p);
 764         if (rc)
 765                 goto out;
 766
 767         for (i = 0; i < SYM_NUM; i++) {
 768                 p->sym_val_to_name[i] = kvcalloc(p->symtab[i].nprim,
 769                                                  sizeof(char *),
 770                                                  GFP_KERNEL);
 771                 if (!p->sym_val_to_name[i])
 772                         return -ENOMEM;
 773
 774                 rc = hashtab_map(&p->symtab[i].table, index_f[i], p);
 775                 if (rc)
 776                         goto out;
 777         }
 778         rc = 0;
 779 out:
 780         return rc;
 781 }
 782
 783 /*
 784  * Free any memory allocated by a policy database structure.
 785  */
 786 void policydb_destroy(struct policydb *p)
 787 {
 788         struct ocontext *c, *ctmp;
 789         struct genfs *g, *gtmp;
 790         int i;
 791         struct role_allow *ra, *lra = NULL;
 792
 793         for (i = 0; i < SYM_NUM; i++) {
 794                 cond_resched();
 795                 hashtab_map(&p->symtab[i].table, destroy_f[i], NULL);
 796                 hashtab_destroy(&p->symtab[i].table);
 797         }
 798
 799         for (i = 0; i < SYM_NUM; i++)
 800                 kvfree(p->sym_val_to_name[i]);
 801
 802         kfree(p->class_val_to_struct);
 803         kfree(p->role_val_to_struct);
 804         kfree(p->user_val_to_struct);
 805         kvfree(p->type_val_to_struct);
 806
 807         avtab_destroy(&p->te_avtab);
 808
 809         for (i = 0; i < OCON_NUM; i++) {
 810                 cond_resched();
 811                 c = p->ocontexts[i];
 812                 while (c) {
 813                         ctmp = c;
 814                         c = c->next;
 815                         ocontext_destroy(ctmp, i);
 816                 }
 817                 p->ocontexts[i] = NULL;
 818         }
 819
 820         g = p->genfs;
 821         while (g) {
 822                 cond_resched();
 823                 kfree(g->fstype);
 824                 c = g->head;
 825                 while (c) {
 826                         ctmp = c;
 827                         c = c->next;
 828                         ocontext_destroy(ctmp, OCON_FSUSE);
 829                 }
 830                 gtmp = g;
 831                 g = g->next;
 832                 kfree(gtmp);
 833         }
 834         p->genfs = NULL;
 835
 836         cond_policydb_destroy(p);
 837
 838         hashtab_map(&p->role_tr, role_tr_destroy, NULL);
 839         hashtab_destroy(&p->role_tr);
 840
 841         for (ra = p->role_allow; ra; ra = ra->next) {
 842                 cond_resched();
 843                 kfree(lra);
 844                 lra = ra;
 845         }
 846         kfree(lra);
 847
 848         hashtab_map(&p->filename_trans, filenametr_destroy, NULL);
 849         hashtab_destroy(&p->filename_trans);
 850
 851         hashtab_map(&p->range_tr, range_tr_destroy, NULL);
 852         hashtab_destroy(&p->range_tr);
 853
 854         if (p->type_attr_map_array) {
 855                 for (i = 0; i < p->p_types.nprim; i++)
 856                         ebitmap_destroy(&p->type_attr_map_array[i]);
 857                 kvfree(p->type_attr_map_array);
 858         }
 859
 860         ebitmap_destroy(&p->filename_trans_ttypes);
 861         ebitmap_destroy(&p->policycaps);
 862         ebitmap_destroy(&p->permissive_map);
 863 }
 864
 865 /*
 866  * Load the initial SIDs specified in a policy database
 867  * structure into a SID table.
 868  */
 869 int policydb_load_isids(struct policydb *p, struct sidtab *s)
 870 {
 871         struct ocontext *head, *c;
 872         int rc;
 873
 874         rc = sidtab_init(s);
 875         if (rc) {
 876                 pr_err("SELinux:  out of memory on SID table init\n");
 877                 return rc;
 878         }
 879
 880         head = p->ocontexts[OCON_ISID];
 881         for (c = head; c; c = c->next) {
 882                 u32 sid = c->sid[0];
 883                 const char *name = security_get_initial_sid_context(sid);
 884
 885                 if (sid == SECSID_NULL) {
 886                         pr_err("SELinux:  SID 0 was assigned a context.\n");
 887                         sidtab_destroy(s);
 888                         return -EINVAL;
 889                 }
 890
 891                 /* Ignore initial SIDs unused by this kernel. */
 892                 if (!name)
 893                         continue;
 894
 895                 rc = sidtab_set_initial(s, sid, &c->context[0]);
 896                 if (rc) {
 897                         pr_err("SELinux:  unable to load initial SID %s.\n",
 898                                name);
 899                         sidtab_destroy(s);
 900                         return rc;
 901                 }
 902         }
 903         return 0;
 904 }
 905
 906 int policydb_class_isvalid(struct policydb *p, unsigned int class)
 907 {
 908         if (!class || class > p->p_classes.nprim)
 909                 return 0;
 910         return 1;
 911 }
 912
 913 int policydb_role_isvalid(struct policydb *p, unsigned int role)
 914 {
 915         if (!role || role > p->p_roles.nprim)
 916                 return 0;
 917         return 1;
 918 }
 919
 920 int policydb_type_isvalid(struct policydb *p, unsigned int type)
 921 {
 922         if (!type || type > p->p_types.nprim)
 923                 return 0;
 924         return 1;
 925 }
 926
 927 /*
 928  * Return 1 if the fields in the security context
 929  * structure `c' are valid.  Return 0 otherwise.
 930  */
 931 int policydb_context_isvalid(struct policydb *p, struct context *c)
 932 {
 933         struct role_datum *role;
 934         struct user_datum *usrdatum;
 935
 936         if (!c->role || c->role > p->p_roles.nprim)
 937                 return 0;
 938
 939         if (!c->user || c->user > p->p_users.nprim)
 940                 return 0;
 941
 942         if (!c->type || c->type > p->p_types.nprim)
 943                 return 0;
 944
 945         if (c->role != OBJECT_R_VAL) {
 946                 /*
 947                  * Role must be authorized for the type.
 948                  */
 949                 role = p->role_val_to_struct[c->role - 1];
 950                 if (!role || !ebitmap_get_bit(&role->types, c->type - 1))
 951                         /* role may not be associated with type */
 952                         return 0;
 953
 954                 /*
 955                  * User must be authorized for the role.
 956                  */
 957                 usrdatum = p->user_val_to_struct[c->user - 1];
 958                 if (!usrdatum)
 959                         return 0;
 960
 961                 if (!ebitmap_get_bit(&usrdatum->roles, c->role - 1))
 962                         /* user may not be associated with role */
 963                         return 0;
 964         }
 965
 966         if (!mls_context_isvalid(p, c))
 967                 return 0;
 968
 969         return 1;
 970 }
 971
 972 /*
 973  * Read a MLS range structure from a policydb binary
 974  * representation file.
 975  */
 976 static int mls_read_range_helper(struct mls_range *r, void *fp)
 977 {
 978         __le32 buf[2];
 979         u32 items;
 980         int rc;
 981
 982         rc = next_entry(buf, fp, sizeof(u32));
 983         if (rc)
 984                 goto out;
 985
 986         rc = -EINVAL;
 987         items = le32_to_cpu(buf[0]);
 988         if (items > ARRAY_SIZE(buf)) {
 989                 pr_err("SELinux: mls:  range overflow\n");
 990                 goto out;
 991         }
 992
 993         rc = next_entry(buf, fp, sizeof(u32) * items);
 994         if (rc) {
 995                 pr_err("SELinux: mls:  truncated range\n");
 996                 goto out;
 997         }
 998
 999         r->level[0].sens = le32_to_cpu(buf[0]);
1000         if (items > 1)
1001                 r->level[1].sens = le32_to_cpu(buf[1]);
1002         else
1003                 r->level[1].sens = r->level[0].sens;
1004
1005         rc = ebitmap_read(&r->level[0].cat, fp);
1006         if (rc) {
1007                 pr_err("SELinux: mls:  error reading low categories\n");
1008                 goto out;
1009         }
1010         if (items > 1) {
1011                 rc = ebitmap_read(&r->level[1].cat, fp);
1012                 if (rc) {
1013                         pr_err("SELinux: mls:  error reading high categories\n");
1014                         goto bad_high;
1015                 }
1016         } else {
1017                 rc = ebitmap_cpy(&r->level[1].cat, &r->level[0].cat);
1018                 if (rc) {
1019                         pr_err("SELinux: mls:  out of memory\n");
1020                         goto bad_high;
1021                 }
1022         }
1023
1024         return 0;
1025 bad_high:
1026         ebitmap_destroy(&r->level[0].cat);
1027 out:
1028         return rc;
1029 }
1030
1031 /*
1032  * Read and validate a security context structure
1033  * from a policydb binary representation file.
1034  */
1035 static int context_read_and_validate(struct context *c,
1036                                      struct policydb *p,
1037                                      void *fp)
1038 {
1039         __le32 buf[3];
1040         int rc;
1041
1042         rc = next_entry(buf, fp, sizeof buf);
1043         if (rc) {
1044                 pr_err("SELinux: context truncated\n");
1045                 goto out;
1046         }
1047         c->user = le32_to_cpu(buf[0]);
1048         c->role = le32_to_cpu(buf[1]);
1049         c->type = le32_to_cpu(buf[2]);
1050         if (p->policyvers >= POLICYDB_VERSION_MLS) {
1051                 rc = mls_read_range_helper(&c->range, fp);
1052                 if (rc) {
1053                         pr_err("SELinux: error reading MLS range of context\n");
1054                         goto out;
1055                 }
1056         }
1057
1058         rc = -EINVAL;
1059         if (!policydb_context_isvalid(p, c)) {
1060                 pr_err("SELinux:  invalid security context\n");
1061                 context_destroy(c);
1062                 goto out;
1063         }
1064         rc = 0;
1065 out:
1066         return rc;
1067 }
1068
1069 /*
1070  * The following *_read functions are used to
1071  * read the symbol data from a policy database
1072  * binary representation file.
1073  */
1074
1075 static int str_read(char **strp, gfp_t flags, void *fp, u32 len)
1076 {
1077         int rc;
1078         char *str;
1079
1080         if ((len == 0) || (len == (u32)-1))
1081                 return -EINVAL;
1082
1083         str = kmalloc(len + 1, flags | __GFP_NOWARN);
1084         if (!str)
1085                 return -ENOMEM;
1086
1087         rc = next_entry(str, fp, len);
1088         if (rc) {
1089                 kfree(str);
1090                 return rc;
1091         }
1092
1093         str[len] = '\0';
1094         *strp = str;
1095         return 0;
1096 }
1097
1098 static int perm_read(struct policydb *p, struct symtab *s, void *fp)
1099 {
1100         char *key = NULL;
1101         struct perm_datum *perdatum;
1102         int rc;
1103         __le32 buf[2];
1104         u32 len;
1105
1106         perdatum = kzalloc(sizeof(*perdatum), GFP_KERNEL);
1107         if (!perdatum)
1108                 return -ENOMEM;
1109
1110         rc = next_entry(buf, fp, sizeof buf);
1111         if (rc)
1112                 goto bad;
1113
1114         len = le32_to_cpu(buf[0]);
1115         perdatum->value = le32_to_cpu(buf[1]);
1116
1117         rc = str_read(&key, GFP_KERNEL, fp, len);
1118         if (rc)
1119                 goto bad;
1120
1121         rc = symtab_insert(s, key, perdatum);
1122         if (rc)
1123                 goto bad;
1124
1125         return 0;
1126 bad:
1127         perm_destroy(key, perdatum, NULL);
1128         return rc;
1129 }
1130
1131 static int common_read(struct policydb *p, struct symtab *s, void *fp)
1132 {
1133         char *key = NULL;
1134         struct common_datum *comdatum;
1135         __le32 buf[4];
1136         u32 len, nel;
1137         int i, rc;
1138
1139         comdatum = kzalloc(sizeof(*comdatum), GFP_KERNEL);
1140         if (!comdatum)
1141                 return -ENOMEM;
1142
1143         rc = next_entry(buf, fp, sizeof buf);
1144         if (rc)
1145                 goto bad;
1146
1147         len = le32_to_cpu(buf[0]);
1148         comdatum->value = le32_to_cpu(buf[1]);
1149         nel = le32_to_cpu(buf[3]);
1150
1151         rc = symtab_init(&comdatum->permissions, nel);
1152         if (rc)
1153                 goto bad;
1154         comdatum->permissions.nprim = le32_to_cpu(buf[2]);
1155
1156         rc = str_read(&key, GFP_KERNEL, fp, len);
1157         if (rc)
1158                 goto bad;
1159
1160         for (i = 0; i < nel; i++) {
1161                 rc = perm_read(p, &comdatum->permissions, fp);
1162                 if (rc)
1163                         goto bad;
1164         }
1165
1166         rc = symtab_insert(s, key, comdatum);
1167         if (rc)
1168                 goto bad;
1169         return 0;
1170 bad:
1171         common_destroy(key, comdatum, NULL);
1172         return rc;
1173 }
1174
1175 static void type_set_init(struct type_set *t)
1176 {
1177         ebitmap_init(&t->types);
1178         ebitmap_init(&t->negset);
1179 }
1180
1181 static int type_set_read(struct type_set *t, void *fp)
1182 {
1183         __le32 buf[1];
1184         int rc;
1185
1186         if (ebitmap_read(&t->types, fp))
1187                 return -EINVAL;
1188         if (ebitmap_read(&t->negset, fp))
1189                 return -EINVAL;
1190
1191         rc = next_entry(buf, fp, sizeof(u32));
1192         if (rc < 0)
1193                 return -EINVAL;
1194         t->flags = le32_to_cpu(buf[0]);
1195
1196         return 0;
1197 }
1198
1199
1200 static int read_cons_helper(struct policydb *p,
1201                                 struct constraint_node **nodep,
1202                                 int ncons, int allowxtarget, void *fp)
1203 {
1204         struct constraint_node *c, *lc;
1205         struct constraint_expr *e, *le;
1206         __le32 buf[3];
1207         u32 nexpr;
1208         int rc, i, j, depth;
1209
1210         lc = NULL;
1211         for (i = 0; i < ncons; i++) {
1212                 c = kzalloc(sizeof(*c), GFP_KERNEL);
1213                 if (!c)
1214                         return -ENOMEM;
1215
1216                 if (lc)
1217                         lc->next = c;
1218                 else
1219                         *nodep = c;
1220
1221                 rc = next_entry(buf, fp, (sizeof(u32) * 2));
1222                 if (rc)
1223                         return rc;
1224                 c->permissions = le32_to_cpu(buf[0]);
1225                 nexpr = le32_to_cpu(buf[1]);
1226                 le = NULL;
1227                 depth = -1;
1228                 for (j = 0; j < nexpr; j++) {
1229                         e = kzalloc(sizeof(*e), GFP_KERNEL);
1230                         if (!e)
1231                                 return -ENOMEM;
1232
1233                         if (le)
1234                                 le->next = e;
1235                         else
1236                                 c->expr = e;
1237
1238                         rc = next_entry(buf, fp, (sizeof(u32) * 3));
1239                         if (rc)
1240                                 return rc;
1241                         e->expr_type = le32_to_cpu(buf[0]);
1242                         e->attr = le32_to_cpu(buf[1]);
1243                         e->op = le32_to_cpu(buf[2]);
1244
1245                         switch (e->expr_type) {
1246                         case CEXPR_NOT:
1247                                 if (depth < 0)
1248                                         return -EINVAL;
1249                                 break;
1250                         case CEXPR_AND:
1251                         case CEXPR_OR:
1252                                 if (depth < 1)
1253                                         return -EINVAL;
1254                                 depth--;
1255                                 break;
1256                         case CEXPR_ATTR:
1257                                 if (depth == (CEXPR_MAXDEPTH - 1))
1258                                         return -EINVAL;
1259                                 depth++;
1260                                 break;
1261                         case CEXPR_NAMES:
1262                                 if (!allowxtarget && (e->attr & CEXPR_XTARGET))
1263                                         return -EINVAL;
1264                                 if (depth == (CEXPR_MAXDEPTH - 1))
1265                                         return -EINVAL;
1266                                 depth++;
1267                                 rc = ebitmap_read(&e->names, fp);
1268                                 if (rc)
1269                                         return rc;
1270                                 if (p->policyvers >=
1271                                     POLICYDB_VERSION_CONSTRAINT_NAMES) {
1272                                         e->type_names = kzalloc(sizeof
1273                                                 (*e->type_names), GFP_KERNEL);
1274                                         if (!e->type_names)
1275                                                 return -ENOMEM;
1276                                         type_set_init(e->type_names);
1277                                         rc = type_set_read(e->type_names, fp);
1278                                         if (rc)
1279                                                 return rc;
1280                                 }
1281                                 break;
1282                         default:
1283                                 return -EINVAL;
1284                         }
1285                         le = e;
1286                 }
1287                 if (depth != 0)
1288                         return -EINVAL;
1289                 lc = c;
1290         }
1291
1292         return 0;
1293 }
1294
1295 static int class_read(struct policydb *p, struct symtab *s, void *fp)
1296 {
1297         char *key = NULL;
1298         struct class_datum *cladatum;
1299         __le32 buf[6];
1300         u32 len, len2, ncons, nel;
1301         int i, rc;
1302
1303         cladatum = kzalloc(sizeof(*cladatum), GFP_KERNEL);
1304         if (!cladatum)
1305                 return -ENOMEM;
1306
1307         rc = next_entry(buf, fp, sizeof(u32)*6);
1308         if (rc)
1309                 goto bad;
1310
1311         len = le32_to_cpu(buf[0]);
1312         len2 = le32_to_cpu(buf[1]);
1313         cladatum->value = le32_to_cpu(buf[2]);
1314         nel = le32_to_cpu(buf[4]);
1315
1316         rc = symtab_init(&cladatum->permissions, nel);
1317         if (rc)
1318                 goto bad;
1319         cladatum->permissions.nprim = le32_to_cpu(buf[3]);
1320
1321         ncons = le32_to_cpu(buf[5]);
1322
1323         rc = str_read(&key, GFP_KERNEL, fp, len);
1324         if (rc)
1325                 goto bad;
1326
1327         if (len2) {
1328                 rc = str_read(&cladatum->comkey, GFP_KERNEL, fp, len2);
1329                 if (rc)
1330                         goto bad;
1331
1332                 rc = -EINVAL;
1333                 cladatum->comdatum = symtab_search(&p->p_commons,
1334                                                    cladatum->comkey);
1335                 if (!cladatum->comdatum) {
1336                         pr_err("SELinux:  unknown common %s\n",
1337                                cladatum->comkey);
1338                         goto bad;
1339                 }
1340         }
1341         for (i = 0; i < nel; i++) {
1342                 rc = perm_read(p, &cladatum->permissions, fp);
1343                 if (rc)
1344                         goto bad;
1345         }
1346
1347         rc = read_cons_helper(p, &cladatum->constraints, ncons, 0, fp);
1348         if (rc)
1349                 goto bad;
1350
1351         if (p->policyvers >= POLICYDB_VERSION_VALIDATETRANS) {
1352                 /* grab the validatetrans rules */
1353                 rc = next_entry(buf, fp, sizeof(u32));
1354                 if (rc)
1355                         goto bad;
1356                 ncons = le32_to_cpu(buf[0]);
1357                 rc = read_cons_helper(p, &cladatum->validatetrans,
1358                                 ncons, 1, fp);
1359                 if (rc)
1360                         goto bad;
1361         }
1362
1363         if (p->policyvers >= POLICYDB_VERSION_NEW_OBJECT_DEFAULTS) {
1364                 rc = next_entry(buf, fp, sizeof(u32) * 3);
1365                 if (rc)
1366                         goto bad;
1367
1368                 cladatum->default_user = le32_to_cpu(buf[0]);
1369                 cladatum->default_role = le32_to_cpu(buf[1]);
1370                 cladatum->default_range = le32_to_cpu(buf[2]);
1371         }
1372
1373         if (p->policyvers >= POLICYDB_VERSION_DEFAULT_TYPE) {
1374                 rc = next_entry(buf, fp, sizeof(u32) * 1);
1375                 if (rc)
1376                         goto bad;
1377                 cladatum->default_type = le32_to_cpu(buf[0]);
1378         }
1379
1380         rc = symtab_insert(s, key, cladatum);
1381         if (rc)
1382                 goto bad;
1383
1384         return 0;
1385 bad:
1386         cls_destroy(key, cladatum, NULL);
1387         return rc;
1388 }
1389
1390 static int role_read(struct policydb *p, struct symtab *s, void *fp)
1391 {
1392         char *key = NULL;
1393         struct role_datum *role;
1394         int rc, to_read = 2;
1395         __le32 buf[3];
1396         u32 len;
1397
1398         role = kzalloc(sizeof(*role), GFP_KERNEL);
1399         if (!role)
1400                 return -ENOMEM;
1401
1402         if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1403                 to_read = 3;
1404
1405         rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1406         if (rc)
1407                 goto bad;
1408
1409         len = le32_to_cpu(buf[0]);
1410         role->value = le32_to_cpu(buf[1]);
1411         if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1412                 role->bounds = le32_to_cpu(buf[2]);
1413
1414         rc = str_read(&key, GFP_KERNEL, fp, len);
1415         if (rc)
1416                 goto bad;
1417
1418         rc = ebitmap_read(&role->dominates, fp);
1419         if (rc)
1420                 goto bad;
1421
1422         rc = ebitmap_read(&role->types, fp);
1423         if (rc)
1424                 goto bad;
1425
1426         if (strcmp(key, OBJECT_R) == 0) {
1427                 rc = -EINVAL;
1428                 if (role->value != OBJECT_R_VAL) {
1429                         pr_err("SELinux: Role %s has wrong value %d\n",
1430                                OBJECT_R, role->value);
1431                         goto bad;
1432                 }
1433                 rc = 0;
1434                 goto bad;
1435         }
1436
1437         rc = symtab_insert(s, key, role);
1438         if (rc)
1439                 goto bad;
1440         return 0;
1441 bad:
1442         role_destroy(key, role, NULL);
1443         return rc;
1444 }
1445
1446 static int type_read(struct policydb *p, struct symtab *s, void *fp)
1447 {
1448         char *key = NULL;
1449         struct type_datum *typdatum;
1450         int rc, to_read = 3;
1451         __le32 buf[4];
1452         u32 len;
1453
1454         typdatum = kzalloc(sizeof(*typdatum), GFP_KERNEL);
1455         if (!typdatum)
1456                 return -ENOMEM;
1457
1458         if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1459                 to_read = 4;
1460
1461         rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1462         if (rc)
1463                 goto bad;
1464
1465         len = le32_to_cpu(buf[0]);
1466         typdatum->value = le32_to_cpu(buf[1]);
1467         if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) {
1468                 u32 prop = le32_to_cpu(buf[2]);
1469
1470                 if (prop & TYPEDATUM_PROPERTY_PRIMARY)
1471                         typdatum->primary = 1;
1472                 if (prop & TYPEDATUM_PROPERTY_ATTRIBUTE)
1473                         typdatum->attribute = 1;
1474
1475                 typdatum->bounds = le32_to_cpu(buf[3]);
1476         } else {
1477                 typdatum->primary = le32_to_cpu(buf[2]);
1478         }
1479
1480         rc = str_read(&key, GFP_KERNEL, fp, len);
1481         if (rc)
1482                 goto bad;
1483
1484         rc = symtab_insert(s, key, typdatum);
1485         if (rc)
1486                 goto bad;
1487         return 0;
1488 bad:
1489         type_destroy(key, typdatum, NULL);
1490         return rc;
1491 }
1492
1493
1494 /*
1495  * Read a MLS level structure from a policydb binary
1496  * representation file.
1497  */
1498 static int mls_read_level(struct mls_level *lp, void *fp)
1499 {
1500         __le32 buf[1];
1501         int rc;
1502
1503         memset(lp, 0, sizeof(*lp));
1504
1505         rc = next_entry(buf, fp, sizeof buf);
1506         if (rc) {
1507                 pr_err("SELinux: mls: truncated level\n");
1508                 return rc;
1509         }
1510         lp->sens = le32_to_cpu(buf[0]);
1511
1512         rc = ebitmap_read(&lp->cat, fp);
1513         if (rc) {
1514                 pr_err("SELinux: mls:  error reading level categories\n");
1515                 return rc;
1516         }
1517         return 0;
1518 }
1519
1520 static int user_read(struct policydb *p, struct symtab *s, void *fp)
1521 {
1522         char *key = NULL;
1523         struct user_datum *usrdatum;
1524         int rc, to_read = 2;
1525         __le32 buf[3];
1526         u32 len;
1527
1528         usrdatum = kzalloc(sizeof(*usrdatum), GFP_KERNEL);
1529         if (!usrdatum)
1530                 return -ENOMEM;
1531
1532         if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1533                 to_read = 3;
1534
1535         rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1536         if (rc)
1537                 goto bad;
1538
1539         len = le32_to_cpu(buf[0]);
1540         usrdatum->value = le32_to_cpu(buf[1]);
1541         if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1542                 usrdatum->bounds = le32_to_cpu(buf[2]);
1543
1544         rc = str_read(&key, GFP_KERNEL, fp, len);
1545         if (rc)
1546                 goto bad;
1547
1548         rc = ebitmap_read(&usrdatum->roles, fp);
1549         if (rc)
1550                 goto bad;
1551
1552         if (p->policyvers >= POLICYDB_VERSION_MLS) {
1553                 rc = mls_read_range_helper(&usrdatum->range, fp);
1554                 if (rc)
1555                         goto bad;
1556                 rc = mls_read_level(&usrdatum->dfltlevel, fp);
1557                 if (rc)
1558                         goto bad;
1559         }
1560
1561         rc = symtab_insert(s, key, usrdatum);
1562         if (rc)
1563                 goto bad;
1564         return 0;
1565 bad:
1566         user_destroy(key, usrdatum, NULL);
1567         return rc;
1568 }
1569
1570 static int sens_read(struct policydb *p, struct symtab *s, void *fp)
1571 {
1572         char *key = NULL;
1573         struct level_datum *levdatum;
1574         int rc;
1575         __le32 buf[2];
1576         u32 len;
1577
1578         levdatum = kzalloc(sizeof(*levdatum), GFP_ATOMIC);
1579         if (!levdatum)
1580                 return -ENOMEM;
1581
1582         rc = next_entry(buf, fp, sizeof buf);
1583         if (rc)
1584                 goto bad;
1585
1586         len = le32_to_cpu(buf[0]);
1587         levdatum->isalias = le32_to_cpu(buf[1]);
1588
1589         rc = str_read(&key, GFP_ATOMIC, fp, len);
1590         if (rc)
1591                 goto bad;
1592
1593         rc = -ENOMEM;
1594         levdatum->level = kmalloc(sizeof(*levdatum->level), GFP_ATOMIC);
1595         if (!levdatum->level)
1596                 goto bad;
1597
1598         rc = mls_read_level(levdatum->level, fp);
1599         if (rc)
1600                 goto bad;
1601
1602         rc = symtab_insert(s, key, levdatum);
1603         if (rc)
1604                 goto bad;
1605         return 0;
1606 bad:
1607         sens_destroy(key, levdatum, NULL);
1608         return rc;
1609 }
1610
1611 static int cat_read(struct policydb *p, struct symtab *s, void *fp)
1612 {
1613         char *key = NULL;
1614         struct cat_datum *catdatum;
1615         int rc;
1616         __le32 buf[3];
1617         u32 len;
1618
1619         catdatum = kzalloc(sizeof(*catdatum), GFP_ATOMIC);
1620         if (!catdatum)
1621                 return -ENOMEM;
1622
1623         rc = next_entry(buf, fp, sizeof buf);
1624         if (rc)
1625                 goto bad;
1626
1627         len = le32_to_cpu(buf[0]);
1628         catdatum->value = le32_to_cpu(buf[1]);
1629         catdatum->isalias = le32_to_cpu(buf[2]);
1630
1631         rc = str_read(&key, GFP_ATOMIC, fp, len);
1632         if (rc)
1633                 goto bad;
1634
1635         rc = symtab_insert(s, key, catdatum);
1636         if (rc)
1637                 goto bad;
1638         return 0;
1639 bad:
1640         cat_destroy(key, catdatum, NULL);
1641         return rc;
1642 }
1643
1644 static int (*read_f[SYM_NUM]) (struct policydb *p, struct symtab *s, void *fp) =
1645 {
1646         common_read,
1647         class_read,
1648         role_read,
1649         type_read,
1650         user_read,
1651         cond_read_bool,
1652         sens_read,
1653         cat_read,
1654 };
1655
1656 static int user_bounds_sanity_check(void *key, void *datum, void *datap)
1657 {
1658         struct user_datum *upper, *user;
1659         struct policydb *p = datap;
1660         int depth = 0;
1661
1662         upper = user = datum;
1663         while (upper->bounds) {
1664                 struct ebitmap_node *node;
1665                 unsigned long bit;
1666
1667                 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1668                         pr_err("SELinux: user %s: "
1669                                "too deep or looped boundary",
1670                                (char *) key);
1671                         return -EINVAL;
1672                 }
1673
1674                 upper = p->user_val_to_struct[upper->bounds - 1];
1675                 ebitmap_for_each_positive_bit(&user->roles, node, bit) {
1676                         if (ebitmap_get_bit(&upper->roles, bit))
1677                                 continue;
1678
1679                         pr_err("SELinux: boundary violated policy: "
1680                                "user=%s role=%s bounds=%s\n",
1681                                sym_name(p, SYM_USERS, user->value - 1),
1682                                sym_name(p, SYM_ROLES, bit),
1683                                sym_name(p, SYM_USERS, upper->value - 1));
1684
1685                         return -EINVAL;
1686                 }
1687         }
1688
1689         return 0;
1690 }
1691
1692 static int role_bounds_sanity_check(void *key, void *datum, void *datap)
1693 {
1694         struct role_datum *upper, *role;
1695         struct policydb *p = datap;
1696         int depth = 0;
1697
1698         upper = role = datum;
1699         while (upper->bounds) {
1700                 struct ebitmap_node *node;
1701                 unsigned long bit;
1702
1703                 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1704                         pr_err("SELinux: role %s: "
1705                                "too deep or looped bounds\n",
1706                                (char *) key);
1707                         return -EINVAL;
1708                 }
1709
1710                 upper = p->role_val_to_struct[upper->bounds - 1];
1711                 ebitmap_for_each_positive_bit(&role->types, node, bit) {
1712                         if (ebitmap_get_bit(&upper->types, bit))
1713                                 continue;
1714
1715                         pr_err("SELinux: boundary violated policy: "
1716                                "role=%s type=%s bounds=%s\n",
1717                                sym_name(p, SYM_ROLES, role->value - 1),
1718                                sym_name(p, SYM_TYPES, bit),
1719                                sym_name(p, SYM_ROLES, upper->value - 1));
1720
1721                         return -EINVAL;
1722                 }
1723         }
1724
1725         return 0;
1726 }
1727
1728 static int type_bounds_sanity_check(void *key, void *datum, void *datap)
1729 {
1730         struct type_datum *upper;
1731         struct policydb *p = datap;
1732         int depth = 0;
1733
1734         upper = datum;
1735         while (upper->bounds) {
1736                 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1737                         pr_err("SELinux: type %s: "
1738                                "too deep or looped boundary\n",
1739                                (char *) key);
1740                         return -EINVAL;
1741                 }
1742
1743                 upper = p->type_val_to_struct[upper->bounds - 1];
1744                 BUG_ON(!upper);
1745
1746                 if (upper->attribute) {
1747                         pr_err("SELinux: type %s: "
1748                                "bounded by attribute %s",
1749                                (char *) key,
1750                                sym_name(p, SYM_TYPES, upper->value - 1));
1751                         return -EINVAL;
1752                 }
1753         }
1754
1755         return 0;
1756 }
1757
1758 static int policydb_bounds_sanity_check(struct policydb *p)
1759 {
1760         int rc;
1761
1762         if (p->policyvers < POLICYDB_VERSION_BOUNDARY)
1763                 return 0;
1764
1765         rc = hashtab_map(&p->p_users.table, user_bounds_sanity_check, p);
1766         if (rc)
1767                 return rc;
1768
1769         rc = hashtab_map(&p->p_roles.table, role_bounds_sanity_check, p);
1770         if (rc)
1771                 return rc;
1772
1773         rc = hashtab_map(&p->p_types.table, type_bounds_sanity_check, p);
1774         if (rc)
1775                 return rc;
1776
1777         return 0;
1778 }
1779
1780 u16 string_to_security_class(struct policydb *p, const char *name)
1781 {
1782         struct class_datum *cladatum;
1783
1784         cladatum = symtab_search(&p->p_classes, name);
1785         if (!cladatum)
1786                 return 0;
1787
1788         return cladatum->value;
1789 }
1790
1791 u32 string_to_av_perm(struct policydb *p, u16 tclass, const char *name)
1792 {
1793         struct class_datum *cladatum;
1794         struct perm_datum *perdatum = NULL;
1795         struct common_datum *comdatum;
1796
1797         if (!tclass || tclass > p->p_classes.nprim)
1798                 return 0;
1799
1800         cladatum = p->class_val_to_struct[tclass-1];
1801         comdatum = cladatum->comdatum;
1802         if (comdatum)
1803                 perdatum = symtab_search(&comdatum->permissions, name);
1804         if (!perdatum)
1805                 perdatum = symtab_search(&cladatum->permissions, name);
1806         if (!perdatum)
1807                 return 0;
1808
1809         return 1U << (perdatum->value-1);
1810 }
1811
1812 static int range_read(struct policydb *p, void *fp)
1813 {
1814         struct range_trans *rt = NULL;
1815         struct mls_range *r = NULL;
1816         int i, rc;
1817         __le32 buf[2];
1818         u32 nel;
1819
1820         if (p->policyvers < POLICYDB_VERSION_MLS)
1821                 return 0;
1822
1823         rc = next_entry(buf, fp, sizeof(u32));
1824         if (rc)
1825                 return rc;
1826
1827         nel = le32_to_cpu(buf[0]);
1828
1829         rc = hashtab_init(&p->range_tr, nel);
1830         if (rc)
1831                 return rc;
1832
1833         for (i = 0; i < nel; i++) {
1834                 rc = -ENOMEM;
1835                 rt = kzalloc(sizeof(*rt), GFP_KERNEL);
1836                 if (!rt)
1837                         goto out;
1838
1839                 rc = next_entry(buf, fp, (sizeof(u32) * 2));
1840                 if (rc)
1841                         goto out;
1842
1843                 rt->source_type = le32_to_cpu(buf[0]);
1844                 rt->target_type = le32_to_cpu(buf[1]);
1845                 if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) {
1846                         rc = next_entry(buf, fp, sizeof(u32));
1847                         if (rc)
1848                                 goto out;
1849                         rt->target_class = le32_to_cpu(buf[0]);
1850                 } else
1851                         rt->target_class = p->process_class;
1852
1853                 rc = -EINVAL;
1854                 if (!policydb_type_isvalid(p, rt->source_type) ||
1855                     !policydb_type_isvalid(p, rt->target_type) ||
1856                     !policydb_class_isvalid(p, rt->target_class))
1857                         goto out;
1858
1859                 rc = -ENOMEM;
1860                 r = kzalloc(sizeof(*r), GFP_KERNEL);
1861                 if (!r)
1862                         goto out;
1863
1864                 rc = mls_read_range_helper(r, fp);
1865                 if (rc)
1866                         goto out;
1867
1868                 rc = -EINVAL;
1869                 if (!mls_range_isvalid(p, r)) {
1870                         pr_warn("SELinux:  rangetrans:  invalid range\n");
1871                         goto out;
1872                 }
1873
1874                 rc = hashtab_insert(&p->range_tr, rt, r, rangetr_key_params);
1875                 if (rc)
1876                         goto out;
1877
1878                 rt = NULL;
1879                 r = NULL;
1880         }
1881         hash_eval(&p->range_tr, "rangetr");
1882         rc = 0;
1883 out:
1884         kfree(rt);
1885         kfree(r);
1886         return rc;
1887 }
1888
1889 static int filename_trans_read_helper_compat(struct policydb *p, void *fp)
1890 {
1891         struct filename_trans_key key, *ft = NULL;
1892         struct filename_trans_datum *last, *datum = NULL;
1893         char *name = NULL;
1894         u32 len, stype, otype;
1895         __le32 buf[4];
1896         int rc;
1897
1898         /* length of the path component string */
1899         rc = next_entry(buf, fp, sizeof(u32));
1900         if (rc)
1901                 return rc;
1902         len = le32_to_cpu(buf[0]);
1903
1904         /* path component string */
1905         rc = str_read(&name, GFP_KERNEL, fp, len);
1906         if (rc)
1907                 return rc;
1908
1909         rc = next_entry(buf, fp, sizeof(u32) * 4);
1910         if (rc)
1911                 goto out;
1912
1913         stype = le32_to_cpu(buf[0]);
1914         key.ttype = le32_to_cpu(buf[1]);
1915         key.tclass = le32_to_cpu(buf[2]);
1916         key.name = name;
1917
1918         otype = le32_to_cpu(buf[3]);
1919
1920         last = NULL;
1921         datum = policydb_filenametr_search(p, &key);
1922         while (datum) {
1923                 if (unlikely(ebitmap_get_bit(&datum->stypes, stype - 1))) {
1924                         /* conflicting/duplicate rules are ignored */
1925                         datum = NULL;
1926                         goto out;
1927                 }
1928                 if (likely(datum->otype == otype))
1929                         break;
1930                 last = datum;
1931                 datum = datum->next;
1932         }
1933         if (!datum) {
1934                 rc = -ENOMEM;
1935                 datum = kmalloc(sizeof(*datum), GFP_KERNEL);
1936                 if (!datum)
1937                         goto out;
1938
1939                 ebitmap_init(&datum->stypes);
1940                 datum->otype = otype;
1941                 datum->next = NULL;
1942
1943                 if (unlikely(last)) {
1944                         last->next = datum;
1945                 } else {
1946                         rc = -ENOMEM;
1947                         ft = kmemdup(&key, sizeof(key), GFP_KERNEL);
1948                         if (!ft)
1949                                 goto out;
1950
1951                         rc = hashtab_insert(&p->filename_trans, ft, datum,
1952                                             filenametr_key_params);
1953                         if (rc)
1954                                 goto out;
1955                         name = NULL;
1956
1957                         rc = ebitmap_set_bit(&p->filename_trans_ttypes,
1958                                              key.ttype, 1);
1959                         if (rc)
1960                                 return rc;
1961                 }
1962         }
1963         kfree(name);
1964         return ebitmap_set_bit(&datum->stypes, stype - 1, 1);
1965
1966 out:
1967         kfree(ft);
1968         kfree(name);
1969         kfree(datum);
1970         return rc;
1971 }
1972
1973 static int filename_trans_read_helper(struct policydb *p, void *fp)
1974 {
1975         struct filename_trans_key *ft = NULL;
1976         struct filename_trans_datum **dst, *datum, *first = NULL;
1977         char *name = NULL;
1978         u32 len, ttype, tclass, ndatum, i;
1979         __le32 buf[3];
1980         int rc;
1981
1982         /* length of the path component string */
1983         rc = next_entry(buf, fp, sizeof(u32));
1984         if (rc)
1985                 return rc;
1986         len = le32_to_cpu(buf[0]);
1987
1988         /* path component string */
1989         rc = str_read(&name, GFP_KERNEL, fp, len);
1990         if (rc)
1991                 return rc;
1992
1993         rc = next_entry(buf, fp, sizeof(u32) * 3);
1994         if (rc)
1995                 goto out;
1996
1997         ttype = le32_to_cpu(buf[0]);
1998         tclass = le32_to_cpu(buf[1]);
1999
2000         ndatum = le32_to_cpu(buf[2]);
2001         if (ndatum == 0) {
2002                 pr_err("SELinux:  Filename transition key with no datum\n");
2003                 rc = -ENOENT;
2004                 goto out;
2005         }
2006
2007         dst = &first;
2008         for (i = 0; i < ndatum; i++) {
2009                 rc = -ENOMEM;
2010                 datum = kmalloc(sizeof(*datum), GFP_KERNEL);
2011                 if (!datum)
2012                         goto out;
2013
2014                 *dst = datum;
2015
2016                 /* ebitmap_read() will at least init the bitmap */
2017                 rc = ebitmap_read(&datum->stypes, fp);
2018                 if (rc)
2019                         goto out;
2020
2021                 rc = next_entry(buf, fp, sizeof(u32));
2022                 if (rc)
2023                         goto out;
2024
2025                 datum->otype = le32_to_cpu(buf[0]);
2026                 datum->next = NULL;
2027
2028                 dst = &datum->next;
2029         }
2030
2031         rc = -ENOMEM;
2032         ft = kmalloc(sizeof(*ft), GFP_KERNEL);
2033         if (!ft)
2034                 goto out;
2035
2036         ft->ttype = ttype;
2037         ft->tclass = tclass;
2038         ft->name = name;
2039
2040         rc = hashtab_insert(&p->filename_trans, ft, first,
2041                             filenametr_key_params);
2042         if (rc == -EEXIST)
2043                 pr_err("SELinux:  Duplicate filename transition key\n");
2044         if (rc)
2045                 goto out;
2046
2047         return ebitmap_set_bit(&p->filename_trans_ttypes, ttype, 1);
2048
2049 out:
2050         kfree(ft);
2051         kfree(name);
2052         while (first) {
2053                 datum = first;
2054                 first = first->next;
2055
2056                 ebitmap_destroy(&datum->stypes);
2057                 kfree(datum);
2058         }
2059         return rc;
2060 }
2061
2062 static int filename_trans_read(struct policydb *p, void *fp)
2063 {
2064         u32 nel;
2065         __le32 buf[1];
2066         int rc, i;
2067
2068         if (p->policyvers < POLICYDB_VERSION_FILENAME_TRANS)
2069                 return 0;
2070
2071         rc = next_entry(buf, fp, sizeof(u32));
2072         if (rc)
2073                 return rc;
2074         nel = le32_to_cpu(buf[0]);
2075
2076         if (p->policyvers < POLICYDB_VERSION_COMP_FTRANS) {
2077                 p->compat_filename_trans_count = nel;
2078
2079                 rc = hashtab_init(&p->filename_trans, (1 << 11));
2080                 if (rc)
2081                         return rc;
2082
2083                 for (i = 0; i < nel; i++) {
2084                         rc = filename_trans_read_helper_compat(p, fp);
2085                         if (rc)
2086                                 return rc;
2087                 }
2088         } else {
2089                 rc = hashtab_init(&p->filename_trans, nel);
2090                 if (rc)
2091                         return rc;
2092
2093                 for (i = 0; i < nel; i++) {
2094                         rc = filename_trans_read_helper(p, fp);
2095                         if (rc)
2096                                 return rc;
2097                 }
2098         }
2099         hash_eval(&p->filename_trans, "filenametr");
2100         return 0;
2101 }
2102
2103 static int genfs_read(struct policydb *p, void *fp)
2104 {
2105         int i, j, rc;
2106         u32 nel, nel2, len, len2;
2107         __le32 buf[1];
2108         struct ocontext *l, *c;
2109         struct ocontext *newc = NULL;
2110         struct genfs *genfs_p, *genfs;
2111         struct genfs *newgenfs = NULL;
2112
2113         rc = next_entry(buf, fp, sizeof(u32));
2114         if (rc)
2115                 return rc;
2116         nel = le32_to_cpu(buf[0]);
2117
2118         for (i = 0; i < nel; i++) {
2119                 rc = next_entry(buf, fp, sizeof(u32));
2120                 if (rc)
2121                         goto out;
2122                 len = le32_to_cpu(buf[0]);
2123
2124                 rc = -ENOMEM;
2125                 newgenfs = kzalloc(sizeof(*newgenfs), GFP_KERNEL);
2126                 if (!newgenfs)
2127                         goto out;
2128
2129                 rc = str_read(&newgenfs->fstype, GFP_KERNEL, fp, len);
2130                 if (rc)
2131                         goto out;
2132
2133                 for (genfs_p = NULL, genfs = p->genfs; genfs;
2134                      genfs_p = genfs, genfs = genfs->next) {
2135                         rc = -EINVAL;
2136                         if (strcmp(newgenfs->fstype, genfs->fstype) == 0) {
2137                                 pr_err("SELinux:  dup genfs fstype %s\n",
2138                                        newgenfs->fstype);
2139                                 goto out;
2140                         }
2141                         if (strcmp(newgenfs->fstype, genfs->fstype) < 0)
2142                                 break;
2143                 }
2144                 newgenfs->next = genfs;
2145                 if (genfs_p)
2146                         genfs_p->next = newgenfs;
2147                 else
2148                         p->genfs = newgenfs;
2149                 genfs = newgenfs;
2150                 newgenfs = NULL;
2151
2152                 rc = next_entry(buf, fp, sizeof(u32));
2153                 if (rc)
2154                         goto out;
2155
2156                 nel2 = le32_to_cpu(buf[0]);
2157                 for (j = 0; j < nel2; j++) {
2158                         rc = next_entry(buf, fp, sizeof(u32));
2159                         if (rc)
2160                                 goto out;
2161                         len = le32_to_cpu(buf[0]);
2162
2163                         rc = -ENOMEM;
2164                         newc = kzalloc(sizeof(*newc), GFP_KERNEL);
2165                         if (!newc)
2166                                 goto out;
2167
2168                         rc = str_read(&newc->u.name, GFP_KERNEL, fp, len);
2169                         if (rc)
2170                                 goto out;
2171
2172                         rc = next_entry(buf, fp, sizeof(u32));
2173                         if (rc)
2174                                 goto out;
2175
2176                         newc->v.sclass = le32_to_cpu(buf[0]);
2177                         rc = context_read_and_validate(&newc->context[0], p, fp);
2178                         if (rc)
2179                                 goto out;
2180
2181                         for (l = NULL, c = genfs->head; c;
2182                              l = c, c = c->next) {
2183                                 rc = -EINVAL;
2184                                 if (!strcmp(newc->u.name, c->u.name) &&
2185                                     (!c->v.sclass || !newc->v.sclass ||
2186                                      newc->v.sclass == c->v.sclass)) {
2187                                         pr_err("SELinux:  dup genfs entry (%s,%s)\n",
2188                                                genfs->fstype, c->u.name);
2189                                         goto out;
2190                                 }
2191                                 len = strlen(newc->u.name);
2192                                 len2 = strlen(c->u.name);
2193                                 if (len > len2)
2194                                         break;
2195                         }
2196
2197                         newc->next = c;
2198                         if (l)
2199                                 l->next = newc;
2200                         else
2201                                 genfs->head = newc;
2202                         newc = NULL;
2203                 }
2204         }
2205         rc = 0;
2206 out:
2207         if (newgenfs) {
2208                 kfree(newgenfs->fstype);
2209                 kfree(newgenfs);
2210         }
2211         ocontext_destroy(newc, OCON_FSUSE);
2212
2213         return rc;
2214 }
2215
2216 static int ocontext_read(struct policydb *p, struct policydb_compat_info *info,
2217                          void *fp)
2218 {
2219         int i, j, rc;
2220         u32 nel, len;
2221         __be64 prefixbuf[1];
2222         __le32 buf[3];
2223         struct ocontext *l, *c;
2224         u32 nodebuf[8];
2225
2226         for (i = 0; i < info->ocon_num; i++) {
2227                 rc = next_entry(buf, fp, sizeof(u32));
2228                 if (rc)
2229                         goto out;
2230                 nel = le32_to_cpu(buf[0]);
2231
2232                 l = NULL;
2233                 for (j = 0; j < nel; j++) {
2234                         rc = -ENOMEM;
2235                         c = kzalloc(sizeof(*c), GFP_KERNEL);
2236                         if (!c)
2237                                 goto out;
2238                         if (l)
2239                                 l->next = c;
2240                         else
2241                                 p->ocontexts[i] = c;
2242                         l = c;
2243
2244                         switch (i) {
2245                         case OCON_ISID:
2246                                 rc = next_entry(buf, fp, sizeof(u32));
2247                                 if (rc)
2248                                         goto out;
2249
2250                                 c->sid[0] = le32_to_cpu(buf[0]);
2251                                 rc = context_read_and_validate(&c->context[0], p, fp);
2252                                 if (rc)
2253                                         goto out;
2254                                 break;
2255                         case OCON_FS:
2256                         case OCON_NETIF:
2257                                 rc = next_entry(buf, fp, sizeof(u32));
2258                                 if (rc)
2259                                         goto out;
2260                                 len = le32_to_cpu(buf[0]);
2261
2262                                 rc = str_read(&c->u.name, GFP_KERNEL, fp, len);
2263                                 if (rc)
2264                                         goto out;
2265
2266                                 rc = context_read_and_validate(&c->context[0], p, fp);
2267                                 if (rc)
2268                                         goto out;
2269                                 rc = context_read_and_validate(&c->context[1], p, fp);
2270                                 if (rc)
2271                                         goto out;
2272                                 break;
2273                         case OCON_PORT:
2274                                 rc = next_entry(buf, fp, sizeof(u32)*3);
2275                                 if (rc)
2276                                         goto out;
2277                                 c->u.port.protocol = le32_to_cpu(buf[0]);
2278                                 c->u.port.low_port = le32_to_cpu(buf[1]);
2279                                 c->u.port.high_port = le32_to_cpu(buf[2]);
2280                                 rc = context_read_and_validate(&c->context[0], p, fp);
2281                                 if (rc)
2282                                         goto out;
2283                                 break;
2284                         case OCON_NODE:
2285                                 rc = next_entry(nodebuf, fp, sizeof(u32) * 2);
2286                                 if (rc)
2287                                         goto out;
2288                                 c->u.node.addr = nodebuf[0]; /* network order */
2289                                 c->u.node.mask = nodebuf[1]; /* network order */
2290                                 rc = context_read_and_validate(&c->context[0], p, fp);
2291                                 if (rc)
2292                                         goto out;
2293                                 break;
2294                         case OCON_FSUSE:
2295                                 rc = next_entry(buf, fp, sizeof(u32)*2);
2296                                 if (rc)
2297                                         goto out;
2298
2299                                 rc = -EINVAL;
2300                                 c->v.behavior = le32_to_cpu(buf[0]);
2301                                 /* Determined at runtime, not in policy DB. */
2302                                 if (c->v.behavior == SECURITY_FS_USE_MNTPOINT)
2303                                         goto out;
2304                                 if (c->v.behavior > SECURITY_FS_USE_MAX)
2305                                         goto out;
2306
2307                                 len = le32_to_cpu(buf[1]);
2308                                 rc = str_read(&c->u.name, GFP_KERNEL, fp, len);
2309                                 if (rc)
2310                                         goto out;
2311
2312                                 rc = context_read_and_validate(&c->context[0], p, fp);
2313                                 if (rc)
2314                                         goto out;
2315                                 break;
2316                         case OCON_NODE6: {
2317                                 int k;
2318
2319                                 rc = next_entry(nodebuf, fp, sizeof(u32) * 8);
2320                                 if (rc)
2321                                         goto out;
2322                                 for (k = 0; k < 4; k++)
2323                                         c->u.node6.addr[k] = nodebuf[k];
2324                                 for (k = 0; k < 4; k++)
2325                                         c->u.node6.mask[k] = nodebuf[k+4];
2326                                 rc = context_read_and_validate(&c->context[0], p, fp);
2327                                 if (rc)
2328                                         goto out;
2329                                 break;
2330                         }
2331                         case OCON_IBPKEY: {
2332                                 u32 pkey_lo, pkey_hi;
2333
2334                                 rc = next_entry(prefixbuf, fp, sizeof(u64));
2335                                 if (rc)
2336                                         goto out;
2337
2338                                 /* we need to have subnet_prefix in CPU order */
2339                                 c->u.ibpkey.subnet_prefix = be64_to_cpu(prefixbuf[0]);
2340
2341                                 rc = next_entry(buf, fp, sizeof(u32) * 2);
2342                                 if (rc)
2343                                         goto out;
2344
2345                                 pkey_lo = le32_to_cpu(buf[0]);
2346                                 pkey_hi = le32_to_cpu(buf[1]);
2347
2348                                 if (pkey_lo > U16_MAX || pkey_hi > U16_MAX) {
2349                                         rc = -EINVAL;
2350                                         goto out;
2351                                 }
2352
2353                                 c->u.ibpkey.low_pkey  = pkey_lo;
2354                                 c->u.ibpkey.high_pkey = pkey_hi;
2355
2356                                 rc = context_read_and_validate(&c->context[0],
2357                                                                p,
2358                                                                fp);
2359                                 if (rc)
2360                                         goto out;
2361                                 break;
2362                         }
2363                         case OCON_IBENDPORT: {
2364                                 u32 port;
2365
2366                                 rc = next_entry(buf, fp, sizeof(u32) * 2);
2367                                 if (rc)
2368                                         goto out;
2369                                 len = le32_to_cpu(buf[0]);
2370
2371                                 rc = str_read(&c->u.ibendport.dev_name, GFP_KERNEL, fp, len);
2372                                 if (rc)
2373                                         goto out;
2374
2375                                 port = le32_to_cpu(buf[1]);
2376                                 if (port > U8_MAX || port == 0) {
2377                                         rc = -EINVAL;
2378                                         goto out;
2379                                 }
2380
2381                                 c->u.ibendport.port = port;
2382
2383                                 rc = context_read_and_validate(&c->context[0],
2384                                                                p,
2385                                                                fp);
2386                                 if (rc)
2387                                         goto out;
2388                                 break;
2389                         } /* end case */
2390                         } /* end switch */
2391                 }
2392         }
2393         rc = 0;
2394 out:
2395         return rc;
2396 }
2397
2398 /*
2399  * Read the configuration data from a policy database binary
2400  * representation file into a policy database structure.
2401  */
2402 int policydb_read(struct policydb *p, void *fp)
2403 {
2404         struct role_allow *ra, *lra;
2405         struct role_trans_key *rtk = NULL;
2406         struct role_trans_datum *rtd = NULL;
2407         int i, j, rc;
2408         __le32 buf[4];
2409         u32 len, nprim, nel, perm;
2410
2411         char *policydb_str;
2412         struct policydb_compat_info *info;
2413
2414         policydb_init(p);
2415
2416         /* Read the magic number and string length. */
2417         rc = next_entry(buf, fp, sizeof(u32) * 2);
2418         if (rc)
2419                 goto bad;
2420
2421         rc = -EINVAL;
2422         if (le32_to_cpu(buf[0]) != POLICYDB_MAGIC) {
2423                 pr_err("SELinux:  policydb magic number 0x%x does "
2424                        "not match expected magic number 0x%x\n",
2425                        le32_to_cpu(buf[0]), POLICYDB_MAGIC);
2426                 goto bad;
2427         }
2428
2429         rc = -EINVAL;
2430         len = le32_to_cpu(buf[1]);
2431         if (len != strlen(POLICYDB_STRING)) {
2432                 pr_err("SELinux:  policydb string length %d does not "
2433                        "match expected length %zu\n",
2434                        len, strlen(POLICYDB_STRING));
2435                 goto bad;
2436         }
2437
2438         rc = -ENOMEM;
2439         policydb_str = kmalloc(len + 1, GFP_KERNEL);
2440         if (!policydb_str) {
2441                 pr_err("SELinux:  unable to allocate memory for policydb "
2442                        "string of length %d\n", len);
2443                 goto bad;
2444         }
2445
2446         rc = next_entry(policydb_str, fp, len);
2447         if (rc) {
2448                 pr_err("SELinux:  truncated policydb string identifier\n");
2449                 kfree(policydb_str);
2450                 goto bad;
2451         }
2452
2453         rc = -EINVAL;
2454         policydb_str[len] = '\0';
2455         if (strcmp(policydb_str, POLICYDB_STRING)) {
2456                 pr_err("SELinux:  policydb string %s does not match "
2457                        "my string %s\n", policydb_str, POLICYDB_STRING);
2458                 kfree(policydb_str);
2459                 goto bad;
2460         }
2461         /* Done with policydb_str. */
2462         kfree(policydb_str);
2463         policydb_str = NULL;
2464
2465         /* Read the version and table sizes. */
2466         rc = next_entry(buf, fp, sizeof(u32)*4);
2467         if (rc)
2468                 goto bad;
2469
2470         rc = -EINVAL;
2471         p->policyvers = le32_to_cpu(buf[0]);
2472         if (p->policyvers < POLICYDB_VERSION_MIN ||
2473             p->policyvers > POLICYDB_VERSION_MAX) {
2474                 pr_err("SELinux:  policydb version %d does not match "
2475                        "my version range %d-%d\n",
2476                        le32_to_cpu(buf[0]), POLICYDB_VERSION_MIN, POLICYDB_VERSION_MAX);
2477                 goto bad;
2478         }
2479
2480         if ((le32_to_cpu(buf[1]) & POLICYDB_CONFIG_MLS)) {
2481                 p->mls_enabled = 1;
2482
2483                 rc = -EINVAL;
2484                 if (p->policyvers < POLICYDB_VERSION_MLS) {
2485                         pr_err("SELinux: security policydb version %d "
2486                                 "(MLS) not backwards compatible\n",
2487                                 p->policyvers);
2488                         goto bad;
2489                 }
2490         }
2491         p->reject_unknown = !!(le32_to_cpu(buf[1]) & REJECT_UNKNOWN);
2492         p->allow_unknown = !!(le32_to_cpu(buf[1]) & ALLOW_UNKNOWN);
2493
2494         if (p->policyvers >= POLICYDB_VERSION_POLCAP) {
2495                 rc = ebitmap_read(&p->policycaps, fp);
2496                 if (rc)
2497                         goto bad;
2498         }
2499
2500         if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE) {
2501                 rc = ebitmap_read(&p->permissive_map, fp);
2502                 if (rc)
2503                         goto bad;
2504         }
2505
2506         rc = -EINVAL;
2507         info = policydb_lookup_compat(p->policyvers);
2508         if (!info) {
2509                 pr_err("SELinux:  unable to find policy compat info "
2510                        "for version %d\n", p->policyvers);
2511                 goto bad;
2512         }
2513
2514         rc = -EINVAL;
2515         if (le32_to_cpu(buf[2]) != info->sym_num ||
2516                 le32_to_cpu(buf[3]) != info->ocon_num) {
2517                 pr_err("SELinux:  policydb table sizes (%d,%d) do "
2518                        "not match mine (%d,%d)\n", le32_to_cpu(buf[2]),
2519                         le32_to_cpu(buf[3]),
2520                        info->sym_num, info->ocon_num);
2521                 goto bad;
2522         }
2523
2524         for (i = 0; i < info->sym_num; i++) {
2525                 rc = next_entry(buf, fp, sizeof(u32)*2);
2526                 if (rc)
2527                         goto bad;
2528                 nprim = le32_to_cpu(buf[0]);
2529                 nel = le32_to_cpu(buf[1]);
2530
2531                 rc = symtab_init(&p->symtab[i], nel);
2532                 if (rc)
2533                         goto out;
2534
2535                 if (i == SYM_ROLES) {
2536                         rc = roles_init(p);
2537                         if (rc)
2538                                 goto out;
2539                 }
2540
2541                 for (j = 0; j < nel; j++) {
2542                         rc = read_f[i](p, &p->symtab[i], fp);
2543                         if (rc)
2544                                 goto bad;
2545                 }
2546
2547                 p->symtab[i].nprim = nprim;
2548         }
2549
2550         rc = -EINVAL;
2551         p->process_class = string_to_security_class(p, "process");
2552         if (!p->process_class) {
2553                 pr_err("SELinux: process class is required, not defined in policy\n");
2554                 goto bad;
2555         }
2556
2557         rc = avtab_read(&p->te_avtab, fp, p);
2558         if (rc)
2559                 goto bad;
2560
2561         if (p->policyvers >= POLICYDB_VERSION_BOOL) {
2562                 rc = cond_read_list(p, fp);
2563                 if (rc)
2564                         goto bad;
2565         }
2566
2567         rc = next_entry(buf, fp, sizeof(u32));
2568         if (rc)
2569                 goto bad;
2570         nel = le32_to_cpu(buf[0]);
2571
2572         rc = hashtab_init(&p->role_tr, nel);
2573         if (rc)
2574                 goto bad;
2575         for (i = 0; i < nel; i++) {
2576                 rc = -ENOMEM;
2577                 rtk = kmalloc(sizeof(*rtk), GFP_KERNEL);
2578                 if (!rtk)
2579                         goto bad;
2580
2581                 rc = -ENOMEM;
2582                 rtd = kmalloc(sizeof(*rtd), GFP_KERNEL);
2583                 if (!rtd)
2584                         goto bad;
2585
2586                 rc = next_entry(buf, fp, sizeof(u32)*3);
2587                 if (rc)
2588                         goto bad;
2589
2590                 rtk->role = le32_to_cpu(buf[0]);
2591                 rtk->type = le32_to_cpu(buf[1]);
2592                 rtd->new_role = le32_to_cpu(buf[2]);
2593                 if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) {
2594                         rc = next_entry(buf, fp, sizeof(u32));
2595                         if (rc)
2596                                 goto bad;
2597                         rtk->tclass = le32_to_cpu(buf[0]);
2598                 } else
2599                         rtk->tclass = p->process_class;
2600
2601                 rc = -EINVAL;
2602                 if (!policydb_role_isvalid(p, rtk->role) ||
2603                     !policydb_type_isvalid(p, rtk->type) ||
2604                     !policydb_class_isvalid(p, rtk->tclass) ||
2605                     !policydb_role_isvalid(p, rtd->new_role))
2606                         goto bad;
2607
2608                 rc = hashtab_insert(&p->role_tr, rtk, rtd, roletr_key_params);
2609                 if (rc)
2610                         goto bad;
2611
2612                 rtk = NULL;
2613                 rtd = NULL;
2614         }
2615
2616         rc = next_entry(buf, fp, sizeof(u32));
2617         if (rc)
2618                 goto bad;
2619         nel = le32_to_cpu(buf[0]);
2620         lra = NULL;
2621         for (i = 0; i < nel; i++) {
2622                 rc = -ENOMEM;
2623                 ra = kzalloc(sizeof(*ra), GFP_KERNEL);
2624                 if (!ra)
2625                         goto bad;
2626                 if (lra)
2627                         lra->next = ra;
2628                 else
2629                         p->role_allow = ra;
2630                 rc = next_entry(buf, fp, sizeof(u32)*2);
2631                 if (rc)
2632                         goto bad;
2633
2634                 rc = -EINVAL;
2635                 ra->role = le32_to_cpu(buf[0]);
2636                 ra->new_role = le32_to_cpu(buf[1]);
2637                 if (!policydb_role_isvalid(p, ra->role) ||
2638                     !policydb_role_isvalid(p, ra->new_role))
2639                         goto bad;
2640                 lra = ra;
2641         }
2642
2643         rc = filename_trans_read(p, fp);
2644         if (rc)
2645                 goto bad;
2646
2647         rc = policydb_index(p);
2648         if (rc)
2649                 goto bad;
2650
2651         rc = -EINVAL;
2652         perm = string_to_av_perm(p, p->process_class, "transition");
2653         if (!perm) {
2654                 pr_err("SELinux: process transition permission is required, not defined in policy\n");
2655                 goto bad;
2656         }
2657         p->process_trans_perms = perm;
2658         perm = string_to_av_perm(p, p->process_class, "dyntransition");
2659         if (!perm) {
2660                 pr_err("SELinux: process dyntransition permission is required, not defined in policy\n");
2661                 goto bad;
2662         }
2663         p->process_trans_perms |= perm;
2664
2665         rc = ocontext_read(p, info, fp);
2666         if (rc)
2667                 goto bad;
2668
2669         rc = genfs_read(p, fp);
2670         if (rc)
2671                 goto bad;
2672
2673         rc = range_read(p, fp);
2674         if (rc)
2675                 goto bad;
2676
2677         rc = -ENOMEM;
2678         p->type_attr_map_array = kvcalloc(p->p_types.nprim,
2679                                           sizeof(*p->type_attr_map_array),
2680                                           GFP_KERNEL);
2681         if (!p->type_attr_map_array)
2682                 goto bad;
2683
2684         /* just in case ebitmap_init() becomes more than just a memset(0): */
2685         for (i = 0; i < p->p_types.nprim; i++)
2686                 ebitmap_init(&p->type_attr_map_array[i]);
2687
2688         for (i = 0; i < p->p_types.nprim; i++) {
2689                 struct ebitmap *e = &p->type_attr_map_array[i];
2690
2691                 if (p->policyvers >= POLICYDB_VERSION_AVTAB) {
2692                         rc = ebitmap_read(e, fp);
2693                         if (rc)
2694                                 goto bad;
2695                 }
2696                 /* add the type itself as the degenerate case */
2697                 rc = ebitmap_set_bit(e, i, 1);
2698                 if (rc)
2699                         goto bad;
2700         }
2701
2702         rc = policydb_bounds_sanity_check(p);
2703         if (rc)
2704                 goto bad;
2705
2706         rc = 0;
2707 out:
2708         return rc;
2709 bad:
2710         kfree(rtk);
2711         kfree(rtd);
2712         policydb_destroy(p);
2713         goto out;
2714 }
2715
2716 /*
2717  * Write a MLS level structure to a policydb binary
2718  * representation file.
2719  */
2720 static int mls_write_level(struct mls_level *l, void *fp)
2721 {
2722         __le32 buf[1];
2723         int rc;
2724
2725         buf[0] = cpu_to_le32(l->sens);
2726         rc = put_entry(buf, sizeof(u32), 1, fp);
2727         if (rc)
2728                 return rc;
2729
2730         rc = ebitmap_write(&l->cat, fp);
2731         if (rc)
2732                 return rc;
2733
2734         return 0;
2735 }
2736
2737 /*
2738  * Write a MLS range structure to a policydb binary
2739  * representation file.
2740  */
2741 static int mls_write_range_helper(struct mls_range *r, void *fp)
2742 {
2743         __le32 buf[3];
2744         size_t items;
2745         int rc, eq;
2746
2747         eq = mls_level_eq(&r->level[1], &r->level[0]);
2748
2749         if (eq)
2750                 items = 2;
2751         else
2752                 items = 3;
2753         buf[0] = cpu_to_le32(items-1);
2754         buf[1] = cpu_to_le32(r->level[0].sens);
2755         if (!eq)
2756                 buf[2] = cpu_to_le32(r->level[1].sens);
2757
2758         BUG_ON(items > ARRAY_SIZE(buf));
2759
2760         rc = put_entry(buf, sizeof(u32), items, fp);
2761         if (rc)
2762                 return rc;
2763
2764         rc = ebitmap_write(&r->level[0].cat, fp);
2765         if (rc)
2766                 return rc;
2767         if (!eq) {
2768                 rc = ebitmap_write(&r->level[1].cat, fp);
2769                 if (rc)
2770                         return rc;
2771         }
2772
2773         return 0;
2774 }
2775
2776 static int sens_write(void *vkey, void *datum, void *ptr)
2777 {
2778         char *key = vkey;
2779         struct level_datum *levdatum = datum;
2780         struct policy_data *pd = ptr;
2781         void *fp = pd->fp;
2782         __le32 buf[2];
2783         size_t len;
2784         int rc;
2785
2786         len = strlen(key);
2787         buf[0] = cpu_to_le32(len);
2788         buf[1] = cpu_to_le32(levdatum->isalias);
2789         rc = put_entry(buf, sizeof(u32), 2, fp);
2790         if (rc)
2791                 return rc;
2792
2793         rc = put_entry(key, 1, len, fp);
2794         if (rc)
2795                 return rc;
2796
2797         rc = mls_write_level(levdatum->level, fp);
2798         if (rc)
2799                 return rc;
2800
2801         return 0;
2802 }
2803
2804 static int cat_write(void *vkey, void *datum, void *ptr)
2805 {
2806         char *key = vkey;
2807         struct cat_datum *catdatum = datum;
2808         struct policy_data *pd = ptr;
2809         void *fp = pd->fp;
2810         __le32 buf[3];
2811         size_t len;
2812         int rc;
2813
2814         len = strlen(key);
2815         buf[0] = cpu_to_le32(len);
2816         buf[1] = cpu_to_le32(catdatum->value);
2817         buf[2] = cpu_to_le32(catdatum->isalias);
2818         rc = put_entry(buf, sizeof(u32), 3, fp);
2819         if (rc)
2820                 return rc;
2821
2822         rc = put_entry(key, 1, len, fp);
2823         if (rc)
2824                 return rc;
2825
2826         return 0;
2827 }
2828
2829 static int role_trans_write_one(void *key, void *datum, void *ptr)
2830 {
2831         struct role_trans_key *rtk = key;
2832         struct role_trans_datum *rtd = datum;
2833         struct policy_data *pd = ptr;
2834         void *fp = pd->fp;
2835         struct policydb *p = pd->p;
2836         __le32 buf[3];
2837         int rc;
2838
2839         buf[0] = cpu_to_le32(rtk->role);
2840         buf[1] = cpu_to_le32(rtk->type);
2841         buf[2] = cpu_to_le32(rtd->new_role);
2842         rc = put_entry(buf, sizeof(u32), 3, fp);
2843         if (rc)
2844                 return rc;
2845         if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) {
2846                 buf[0] = cpu_to_le32(rtk->tclass);
2847                 rc = put_entry(buf, sizeof(u32), 1, fp);
2848                 if (rc)
2849                         return rc;
2850         }
2851         return 0;
2852 }
2853
2854 static int role_trans_write(struct policydb *p, void *fp)
2855 {
2856         struct policy_data pd = { .p = p, .fp = fp };
2857         __le32 buf[1];
2858         int rc;
2859
2860         buf[0] = cpu_to_le32(p->role_tr.nel);
2861         rc = put_entry(buf, sizeof(u32), 1, fp);
2862         if (rc)
2863                 return rc;
2864
2865         return hashtab_map(&p->role_tr, role_trans_write_one, &pd);
2866 }
2867
2868 static int role_allow_write(struct role_allow *r, void *fp)
2869 {
2870         struct role_allow *ra;
2871         __le32 buf[2];
2872         size_t nel;
2873         int rc;
2874
2875         nel = 0;
2876         for (ra = r; ra; ra = ra->next)
2877                 nel++;
2878         buf[0] = cpu_to_le32(nel);
2879         rc = put_entry(buf, sizeof(u32), 1, fp);
2880         if (rc)
2881                 return rc;
2882         for (ra = r; ra; ra = ra->next) {
2883                 buf[0] = cpu_to_le32(ra->role);
2884                 buf[1] = cpu_to_le32(ra->new_role);
2885                 rc = put_entry(buf, sizeof(u32), 2, fp);
2886                 if (rc)
2887                         return rc;
2888         }
2889         return 0;
2890 }
2891
2892 /*
2893  * Write a security context structure
2894  * to a policydb binary representation file.
2895  */
2896 static int context_write(struct policydb *p, struct context *c,
2897                          void *fp)
2898 {
2899         int rc;
2900         __le32 buf[3];
2901
2902         buf[0] = cpu_to_le32(c->user);
2903         buf[1] = cpu_to_le32(c->role);
2904         buf[2] = cpu_to_le32(c->type);
2905
2906         rc = put_entry(buf, sizeof(u32), 3, fp);
2907         if (rc)
2908                 return rc;
2909
2910         rc = mls_write_range_helper(&c->range, fp);
2911         if (rc)
2912                 return rc;
2913
2914         return 0;
2915 }
2916
2917 /*
2918  * The following *_write functions are used to
2919  * write the symbol data to a policy database
2920  * binary representation file.
2921  */
2922
2923 static int perm_write(void *vkey, void *datum, void *fp)
2924 {
2925         char *key = vkey;
2926         struct perm_datum *perdatum = datum;
2927         __le32 buf[2];
2928         size_t len;
2929         int rc;
2930
2931         len = strlen(key);
2932         buf[0] = cpu_to_le32(len);
2933         buf[1] = cpu_to_le32(perdatum->value);
2934         rc = put_entry(buf, sizeof(u32), 2, fp);
2935         if (rc)
2936                 return rc;
2937
2938         rc = put_entry(key, 1, len, fp);
2939         if (rc)
2940                 return rc;
2941
2942         return 0;
2943 }
2944
2945 static int common_write(void *vkey, void *datum, void *ptr)
2946 {
2947         char *key = vkey;
2948         struct common_datum *comdatum = datum;
2949         struct policy_data *pd = ptr;
2950         void *fp = pd->fp;
2951         __le32 buf[4];
2952         size_t len;
2953         int rc;
2954
2955         len = strlen(key);
2956         buf[0] = cpu_to_le32(len);
2957         buf[1] = cpu_to_le32(comdatum->value);
2958         buf[2] = cpu_to_le32(comdatum->permissions.nprim);
2959         buf[3] = cpu_to_le32(comdatum->permissions.table.nel);
2960         rc = put_entry(buf, sizeof(u32), 4, fp);
2961         if (rc)
2962                 return rc;
2963
2964         rc = put_entry(key, 1, len, fp);
2965         if (rc)
2966                 return rc;
2967
2968         rc = hashtab_map(&comdatum->permissions.table, perm_write, fp);
2969         if (rc)
2970                 return rc;
2971
2972         return 0;
2973 }
2974
2975 static int type_set_write(struct type_set *t, void *fp)
2976 {
2977         int rc;
2978         __le32 buf[1];
2979
2980         if (ebitmap_write(&t->types, fp))
2981                 return -EINVAL;
2982         if (ebitmap_write(&t->negset, fp))
2983                 return -EINVAL;
2984
2985         buf[0] = cpu_to_le32(t->flags);
2986         rc = put_entry(buf, sizeof(u32), 1, fp);
2987         if (rc)
2988                 return -EINVAL;
2989
2990         return 0;
2991 }
2992
2993 static int write_cons_helper(struct policydb *p, struct constraint_node *node,
2994                              void *fp)
2995 {
2996         struct constraint_node *c;
2997         struct constraint_expr *e;
2998         __le32 buf[3];
2999         u32 nel;
3000         int rc;
3001
3002         for (c = node; c; c = c->next) {
3003                 nel = 0;
3004                 for (e = c->expr; e; e = e->next)
3005                         nel++;
3006                 buf[0] = cpu_to_le32(c->permissions);
3007                 buf[1] = cpu_to_le32(nel);
3008                 rc = put_entry(buf, sizeof(u32), 2, fp);
3009                 if (rc)
3010                         return rc;
3011                 for (e = c->expr; e; e = e->next) {
3012                         buf[0] = cpu_to_le32(e->expr_type);
3013                         buf[1] = cpu_to_le32(e->attr);
3014                         buf[2] = cpu_to_le32(e->op);
3015                         rc = put_entry(buf, sizeof(u32), 3, fp);
3016                         if (rc)
3017                                 return rc;
3018
3019                         switch (e->expr_type) {
3020                         case CEXPR_NAMES:
3021                                 rc = ebitmap_write(&e->names, fp);
3022                                 if (rc)
3023                                         return rc;
3024                                 if (p->policyvers >=
3025                                         POLICYDB_VERSION_CONSTRAINT_NAMES) {
3026                                         rc = type_set_write(e->type_names, fp);
3027                                         if (rc)
3028                                                 return rc;
3029                                 }
3030                                 break;
3031                         default:
3032                                 break;
3033                         }
3034                 }
3035         }
3036
3037         return 0;
3038 }
3039
3040 static int class_write(void *vkey, void *datum, void *ptr)
3041 {
3042         char *key = vkey;
3043         struct class_datum *cladatum = datum;
3044         struct policy_data *pd = ptr;
3045         void *fp = pd->fp;
3046         struct policydb *p = pd->p;
3047         struct constraint_node *c;
3048         __le32 buf[6];
3049         u32 ncons;
3050         size_t len, len2;
3051         int rc;
3052
3053         len = strlen(key);
3054         if (cladatum->comkey)
3055                 len2 = strlen(cladatum->comkey);
3056         else
3057                 len2 = 0;
3058
3059         ncons = 0;
3060         for (c = cladatum->constraints; c; c = c->next)
3061                 ncons++;
3062
3063         buf[0] = cpu_to_le32(len);
3064         buf[1] = cpu_to_le32(len2);
3065         buf[2] = cpu_to_le32(cladatum->value);
3066         buf[3] = cpu_to_le32(cladatum->permissions.nprim);
3067         buf[4] = cpu_to_le32(cladatum->permissions.table.nel);
3068         buf[5] = cpu_to_le32(ncons);
3069         rc = put_entry(buf, sizeof(u32), 6, fp);
3070         if (rc)
3071                 return rc;
3072
3073         rc = put_entry(key, 1, len, fp);
3074         if (rc)
3075                 return rc;
3076
3077         if (cladatum->comkey) {
3078                 rc = put_entry(cladatum->comkey, 1, len2, fp);
3079                 if (rc)
3080                         return rc;
3081         }
3082
3083         rc = hashtab_map(&cladatum->permissions.table, perm_write, fp);
3084         if (rc)
3085                 return rc;
3086
3087         rc = write_cons_helper(p, cladatum->constraints, fp);
3088         if (rc)
3089                 return rc;
3090
3091         /* write out the validatetrans rule */
3092         ncons = 0;
3093         for (c = cladatum->validatetrans; c; c = c->next)
3094                 ncons++;
3095
3096         buf[0] = cpu_to_le32(ncons);
3097         rc = put_entry(buf, sizeof(u32), 1, fp);
3098         if (rc)
3099                 return rc;
3100
3101         rc = write_cons_helper(p, cladatum->validatetrans, fp);
3102         if (rc)
3103                 return rc;
3104
3105         if (p->policyvers >= POLICYDB_VERSION_NEW_OBJECT_DEFAULTS) {
3106                 buf[0] = cpu_to_le32(cladatum->default_user);
3107                 buf[1] = cpu_to_le32(cladatum->default_role);
3108                 buf[2] = cpu_to_le32(cladatum->default_range);
3109
3110                 rc = put_entry(buf, sizeof(uint32_t), 3, fp);
3111                 if (rc)
3112                         return rc;
3113         }
3114
3115         if (p->policyvers >= POLICYDB_VERSION_DEFAULT_TYPE) {
3116                 buf[0] = cpu_to_le32(cladatum->default_type);
3117                 rc = put_entry(buf, sizeof(uint32_t), 1, fp);
3118                 if (rc)
3119                         return rc;
3120         }
3121
3122         return 0;
3123 }
3124
3125 static int role_write(void *vkey, void *datum, void *ptr)
3126 {
3127         char *key = vkey;
3128         struct role_datum *role = datum;
3129         struct policy_data *pd = ptr;
3130         void *fp = pd->fp;
3131         struct policydb *p = pd->p;
3132         __le32 buf[3];
3133         size_t items, len;
3134         int rc;
3135
3136         len = strlen(key);
3137         items = 0;
3138         buf[items++] = cpu_to_le32(len);
3139         buf[items++] = cpu_to_le32(role->value);
3140         if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
3141                 buf[items++] = cpu_to_le32(role->bounds);
3142
3143         BUG_ON(items > ARRAY_SIZE(buf));
3144
3145         rc = put_entry(buf, sizeof(u32), items, fp);
3146         if (rc)
3147                 return rc;
3148
3149         rc = put_entry(key, 1, len, fp);
3150         if (rc)
3151                 return rc;
3152
3153         rc = ebitmap_write(&role->dominates, fp);
3154         if (rc)
3155                 return rc;
3156
3157         rc = ebitmap_write(&role->types, fp);
3158         if (rc)
3159                 return rc;
3160
3161         return 0;
3162 }
3163
3164 static int type_write(void *vkey, void *datum, void *ptr)
3165 {
3166         char *key = vkey;
3167         struct type_datum *typdatum = datum;
3168         struct policy_data *pd = ptr;
3169         struct policydb *p = pd->p;
3170         void *fp = pd->fp;
3171         __le32 buf[4];
3172         int rc;
3173         size_t items, len;
3174
3175         len = strlen(key);
3176         items = 0;
3177         buf[items++] = cpu_to_le32(len);
3178         buf[items++] = cpu_to_le32(typdatum->value);
3179         if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) {
3180                 u32 properties = 0;
3181
3182                 if (typdatum->primary)
3183                         properties |= TYPEDATUM_PROPERTY_PRIMARY;
3184
3185                 if (typdatum->attribute)
3186                         properties |= TYPEDATUM_PROPERTY_ATTRIBUTE;
3187
3188                 buf[items++] = cpu_to_le32(properties);
3189                 buf[items++] = cpu_to_le32(typdatum->bounds);
3190         } else {
3191                 buf[items++] = cpu_to_le32(typdatum->primary);
3192         }
3193         BUG_ON(items > ARRAY_SIZE(buf));
3194         rc = put_entry(buf, sizeof(u32), items, fp);
3195         if (rc)
3196                 return rc;
3197
3198         rc = put_entry(key, 1, len, fp);
3199         if (rc)
3200                 return rc;
3201
3202         return 0;
3203 }
3204
3205 static int user_write(void *vkey, void *datum, void *ptr)
3206 {
3207         char *key = vkey;
3208         struct user_datum *usrdatum = datum;
3209         struct policy_data *pd = ptr;
3210         struct policydb *p = pd->p;
3211         void *fp = pd->fp;
3212         __le32 buf[3];
3213         size_t items, len;
3214         int rc;
3215
3216         len = strlen(key);
3217         items = 0;
3218         buf[items++] = cpu_to_le32(len);
3219         buf[items++] = cpu_to_le32(usrdatum->value);
3220         if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
3221                 buf[items++] = cpu_to_le32(usrdatum->bounds);
3222         BUG_ON(items > ARRAY_SIZE(buf));
3223         rc = put_entry(buf, sizeof(u32), items, fp);
3224         if (rc)
3225                 return rc;
3226
3227         rc = put_entry(key, 1, len, fp);
3228         if (rc)
3229                 return rc;
3230
3231         rc = ebitmap_write(&usrdatum->roles, fp);
3232         if (rc)
3233                 return rc;
3234
3235         rc = mls_write_range_helper(&usrdatum->range, fp);
3236         if (rc)
3237                 return rc;
3238
3239         rc = mls_write_level(&usrdatum->dfltlevel, fp);
3240         if (rc)
3241                 return rc;
3242
3243         return 0;
3244 }
3245
3246 static int (*write_f[SYM_NUM]) (void *key, void *datum,
3247                                 void *datap) =
3248 {
3249         common_write,
3250         class_write,
3251         role_write,
3252         type_write,
3253         user_write,
3254         cond_write_bool,
3255         sens_write,
3256         cat_write,
3257 };
3258
3259 static int ocontext_write(struct policydb *p, struct policydb_compat_info *info,
3260                           void *fp)
3261 {
3262         unsigned int i, j, rc;
3263         size_t nel, len;
3264         __be64 prefixbuf[1];
3265         __le32 buf[3];
3266         u32 nodebuf[8];
3267         struct ocontext *c;
3268         for (i = 0; i < info->ocon_num; i++) {
3269                 nel = 0;
3270                 for (c = p->ocontexts[i]; c; c = c->next)
3271                         nel++;
3272                 buf[0] = cpu_to_le32(nel);
3273                 rc = put_entry(buf, sizeof(u32), 1, fp);
3274                 if (rc)
3275                         return rc;
3276                 for (c = p->ocontexts[i]; c; c = c->next) {
3277                         switch (i) {
3278                         case OCON_ISID:
3279                                 buf[0] = cpu_to_le32(c->sid[0]);
3280                                 rc = put_entry(buf, sizeof(u32), 1, fp);
3281                                 if (rc)
3282                                         return rc;
3283                                 rc = context_write(p, &c->context[0], fp);
3284                                 if (rc)
3285                                         return rc;
3286                                 break;
3287                         case OCON_FS:
3288                         case OCON_NETIF:
3289                                 len = strlen(c->u.name);
3290                                 buf[0] = cpu_to_le32(len);
3291                                 rc = put_entry(buf, sizeof(u32), 1, fp);
3292                                 if (rc)
3293                                         return rc;
3294                                 rc = put_entry(c->u.name, 1, len, fp);
3295                                 if (rc)
3296                                         return rc;
3297                                 rc = context_write(p, &c->context[0], fp);
3298                                 if (rc)
3299                                         return rc;
3300                                 rc = context_write(p, &c->context[1], fp);
3301                                 if (rc)
3302                                         return rc;
3303                                 break;
3304                         case OCON_PORT:
3305                                 buf[0] = cpu_to_le32(c->u.port.protocol);
3306                                 buf[1] = cpu_to_le32(c->u.port.low_port);
3307                                 buf[2] = cpu_to_le32(c->u.port.high_port);
3308                                 rc = put_entry(buf, sizeof(u32), 3, fp);
3309                                 if (rc)
3310                                         return rc;
3311                                 rc = context_write(p, &c->context[0], fp);
3312                                 if (rc)
3313                                         return rc;
3314                                 break;
3315                         case OCON_NODE:
3316                                 nodebuf[0] = c->u.node.addr; /* network order */
3317                                 nodebuf[1] = c->u.node.mask; /* network order */
3318                                 rc = put_entry(nodebuf, sizeof(u32), 2, fp);
3319                                 if (rc)
3320                                         return rc;
3321                                 rc = context_write(p, &c->context[0], fp);
3322                                 if (rc)
3323                                         return rc;
3324                                 break;
3325                         case OCON_FSUSE:
3326                                 buf[0] = cpu_to_le32(c->v.behavior);
3327                                 len = strlen(c->u.name);
3328                                 buf[1] = cpu_to_le32(len);
3329                                 rc = put_entry(buf, sizeof(u32), 2, fp);
3330                                 if (rc)
3331                                         return rc;
3332                                 rc = put_entry(c->u.name, 1, len, fp);
3333                                 if (rc)
3334                                         return rc;
3335                                 rc = context_write(p, &c->context[0], fp);
3336                                 if (rc)
3337                                         return rc;
3338                                 break;
3339                         case OCON_NODE6:
3340                                 for (j = 0; j < 4; j++)
3341                                         nodebuf[j] = c->u.node6.addr[j]; /* network order */
3342                                 for (j = 0; j < 4; j++)
3343                                         nodebuf[j + 4] = c->u.node6.mask[j]; /* network order */
3344                                 rc = put_entry(nodebuf, sizeof(u32), 8, fp);
3345                                 if (rc)
3346                                         return rc;
3347                                 rc = context_write(p, &c->context[0], fp);
3348                                 if (rc)
3349                                         return rc;
3350                                 break;
3351                         case OCON_IBPKEY:
3352                                 /* subnet_prefix is in CPU order */
3353                                 prefixbuf[0] = cpu_to_be64(c->u.ibpkey.subnet_prefix);
3354
3355                                 rc = put_entry(prefixbuf, sizeof(u64), 1, fp);
3356                                 if (rc)
3357                                         return rc;
3358
3359                                 buf[0] = cpu_to_le32(c->u.ibpkey.low_pkey);
3360                                 buf[1] = cpu_to_le32(c->u.ibpkey.high_pkey);
3361
3362                                 rc = put_entry(buf, sizeof(u32), 2, fp);
3363                                 if (rc)
3364                                         return rc;
3365                                 rc = context_write(p, &c->context[0], fp);
3366                                 if (rc)
3367                                         return rc;
3368                                 break;
3369                         case OCON_IBENDPORT:
3370                                 len = strlen(c->u.ibendport.dev_name);
3371                                 buf[0] = cpu_to_le32(len);
3372                                 buf[1] = cpu_to_le32(c->u.ibendport.port);
3373                                 rc = put_entry(buf, sizeof(u32), 2, fp);
3374                                 if (rc)
3375                                         return rc;
3376                                 rc = put_entry(c->u.ibendport.dev_name, 1, len, fp);
3377                                 if (rc)
3378                                         return rc;
3379                                 rc = context_write(p, &c->context[0], fp);
3380                                 if (rc)
3381                                         return rc;
3382                                 break;
3383                         }
3384                 }
3385         }
3386         return 0;
3387 }
3388
3389 static int genfs_write(struct policydb *p, void *fp)
3390 {
3391         struct genfs *genfs;
3392         struct ocontext *c;
3393         size_t len;
3394         __le32 buf[1];
3395         int rc;
3396
3397         len = 0;
3398         for (genfs = p->genfs; genfs; genfs = genfs->next)
3399                 len++;
3400         buf[0] = cpu_to_le32(len);
3401         rc = put_entry(buf, sizeof(u32), 1, fp);
3402         if (rc)
3403                 return rc;
3404         for (genfs = p->genfs; genfs; genfs = genfs->next) {
3405                 len = strlen(genfs->fstype);
3406                 buf[0] = cpu_to_le32(len);
3407                 rc = put_entry(buf, sizeof(u32), 1, fp);
3408                 if (rc)
3409                         return rc;
3410                 rc = put_entry(genfs->fstype, 1, len, fp);
3411                 if (rc)
3412                         return rc;
3413                 len = 0;
3414                 for (c = genfs->head; c; c = c->next)
3415                         len++;
3416                 buf[0] = cpu_to_le32(len);
3417                 rc = put_entry(buf, sizeof(u32), 1, fp);
3418                 if (rc)
3419                         return rc;
3420                 for (c = genfs->head; c; c = c->next) {
3421                         len = strlen(c->u.name);
3422                         buf[0] = cpu_to_le32(len);
3423                         rc = put_entry(buf, sizeof(u32), 1, fp);
3424                         if (rc)
3425                                 return rc;
3426                         rc = put_entry(c->u.name, 1, len, fp);
3427                         if (rc)
3428                                 return rc;
3429                         buf[0] = cpu_to_le32(c->v.sclass);
3430                         rc = put_entry(buf, sizeof(u32), 1, fp);
3431                         if (rc)
3432                                 return rc;
3433                         rc = context_write(p, &c->context[0], fp);
3434                         if (rc)
3435                                 return rc;
3436                 }
3437         }
3438         return 0;
3439 }
3440
3441 static int range_write_helper(void *key, void *data, void *ptr)
3442 {
3443         __le32 buf[2];
3444         struct range_trans *rt = key;
3445         struct mls_range *r = data;
3446         struct policy_data *pd = ptr;
3447         void *fp = pd->fp;
3448         struct policydb *p = pd->p;
3449         int rc;
3450
3451         buf[0] = cpu_to_le32(rt->source_type);
3452         buf[1] = cpu_to_le32(rt->target_type);
3453         rc = put_entry(buf, sizeof(u32), 2, fp);
3454         if (rc)
3455                 return rc;
3456         if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) {
3457                 buf[0] = cpu_to_le32(rt->target_class);
3458                 rc = put_entry(buf, sizeof(u32), 1, fp);
3459                 if (rc)
3460                         return rc;
3461         }
3462         rc = mls_write_range_helper(r, fp);
3463         if (rc)
3464                 return rc;
3465
3466         return 0;
3467 }
3468
3469 static int range_write(struct policydb *p, void *fp)
3470 {
3471         __le32 buf[1];
3472         int rc;
3473         struct policy_data pd;
3474
3475         pd.p = p;
3476         pd.fp = fp;
3477
3478         buf[0] = cpu_to_le32(p->range_tr.nel);
3479         rc = put_entry(buf, sizeof(u32), 1, fp);
3480         if (rc)
3481                 return rc;
3482
3483         /* actually write all of the entries */
3484         rc = hashtab_map(&p->range_tr, range_write_helper, &pd);
3485         if (rc)
3486                 return rc;
3487
3488         return 0;
3489 }
3490
3491 static int filename_write_helper_compat(void *key, void *data, void *ptr)
3492 {
3493         struct filename_trans_key *ft = key;
3494         struct filename_trans_datum *datum = data;
3495         struct ebitmap_node *node;
3496         void *fp = ptr;
3497         __le32 buf[4];
3498         int rc;
3499         u32 bit, len = strlen(ft->name);
3500
3501         do {
3502                 ebitmap_for_each_positive_bit(&datum->stypes, node, bit) {
3503                         buf[0] = cpu_to_le32(len);
3504                         rc = put_entry(buf, sizeof(u32), 1, fp);
3505                         if (rc)
3506                                 return rc;
3507
3508                         rc = put_entry(ft->name, sizeof(char), len, fp);
3509                         if (rc)
3510                                 return rc;
3511
3512                         buf[0] = cpu_to_le32(bit + 1);
3513                         buf[1] = cpu_to_le32(ft->ttype);
3514                         buf[2] = cpu_to_le32(ft->tclass);
3515                         buf[3] = cpu_to_le32(datum->otype);
3516
3517                         rc = put_entry(buf, sizeof(u32), 4, fp);
3518                         if (rc)
3519                                 return rc;
3520                 }
3521
3522                 datum = datum->next;
3523         } while (unlikely(datum));
3524
3525         return 0;
3526 }
3527
3528 static int filename_write_helper(void *key, void *data, void *ptr)
3529 {
3530         struct filename_trans_key *ft = key;
3531         struct filename_trans_datum *datum;
3532         void *fp = ptr;
3533         __le32 buf[3];
3534         int rc;
3535         u32 ndatum, len = strlen(ft->name);
3536
3537         buf[0] = cpu_to_le32(len);
3538         rc = put_entry(buf, sizeof(u32), 1, fp);
3539         if (rc)
3540                 return rc;
3541
3542         rc = put_entry(ft->name, sizeof(char), len, fp);
3543         if (rc)
3544                 return rc;
3545
3546         ndatum = 0;
3547         datum = data;
3548         do {
3549                 ndatum++;
3550                 datum = datum->next;
3551         } while (unlikely(datum));
3552
3553         buf[0] = cpu_to_le32(ft->ttype);
3554         buf[1] = cpu_to_le32(ft->tclass);
3555         buf[2] = cpu_to_le32(ndatum);
3556         rc = put_entry(buf, sizeof(u32), 3, fp);
3557         if (rc)
3558                 return rc;
3559
3560         datum = data;
3561         do {
3562                 rc = ebitmap_write(&datum->stypes, fp);
3563                 if (rc)
3564                         return rc;
3565
3566                 buf[0] = cpu_to_le32(datum->otype);
3567                 rc = put_entry(buf, sizeof(u32), 1, fp);
3568                 if (rc)
3569                         return rc;
3570
3571                 datum = datum->next;
3572         } while (unlikely(datum));
3573
3574         return 0;
3575 }
3576
3577 static int filename_trans_write(struct policydb *p, void *fp)
3578 {
3579         __le32 buf[1];
3580         int rc;
3581
3582         if (p->policyvers < POLICYDB_VERSION_FILENAME_TRANS)
3583                 return 0;
3584
3585         if (p->policyvers < POLICYDB_VERSION_COMP_FTRANS) {
3586                 buf[0] = cpu_to_le32(p->compat_filename_trans_count);
3587                 rc = put_entry(buf, sizeof(u32), 1, fp);
3588                 if (rc)
3589                         return rc;
3590
3591                 rc = hashtab_map(&p->filename_trans,
3592                                  filename_write_helper_compat, fp);
3593         } else {
3594                 buf[0] = cpu_to_le32(p->filename_trans.nel);
3595                 rc = put_entry(buf, sizeof(u32), 1, fp);
3596                 if (rc)
3597                         return rc;
3598
3599                 rc = hashtab_map(&p->filename_trans, filename_write_helper, fp);
3600         }
3601         return rc;
3602 }
3603
3604 /*
3605  * Write the configuration data in a policy database
3606  * structure to a policy database binary representation
3607  * file.
3608  */
3609 int policydb_write(struct policydb *p, void *fp)
3610 {
3611         unsigned int i, num_syms;
3612         int rc;
3613         __le32 buf[4];
3614         u32 config;
3615         size_t len;
3616         struct policydb_compat_info *info;
3617
3618         /*
3619          * refuse to write policy older than compressed avtab
3620          * to simplify the writer.  There are other tests dropped
3621          * since we assume this throughout the writer code.  Be
3622          * careful if you ever try to remove this restriction
3623          */
3624         if (p->policyvers < POLICYDB_VERSION_AVTAB) {
3625                 pr_err("SELinux: refusing to write policy version %d."
3626                        "  Because it is less than version %d\n", p->policyvers,
3627                        POLICYDB_VERSION_AVTAB);
3628                 return -EINVAL;
3629         }
3630
3631         config = 0;
3632         if (p->mls_enabled)
3633                 config |= POLICYDB_CONFIG_MLS;
3634
3635         if (p->reject_unknown)
3636                 config |= REJECT_UNKNOWN;
3637         if (p->allow_unknown)
3638                 config |= ALLOW_UNKNOWN;
3639
3640         /* Write the magic number and string identifiers. */
3641         buf[0] = cpu_to_le32(POLICYDB_MAGIC);
3642         len = strlen(POLICYDB_STRING);
3643         buf[1] = cpu_to_le32(len);
3644         rc = put_entry(buf, sizeof(u32), 2, fp);
3645         if (rc)
3646                 return rc;
3647         rc = put_entry(POLICYDB_STRING, 1, len, fp);
3648         if (rc)
3649                 return rc;
3650
3651         /* Write the version, config, and table sizes. */
3652         info = policydb_lookup_compat(p->policyvers);
3653         if (!info) {
3654                 pr_err("SELinux: compatibility lookup failed for policy "
3655                     "version %d", p->policyvers);
3656                 return -EINVAL;
3657         }
3658
3659         buf[0] = cpu_to_le32(p->policyvers);
3660         buf[1] = cpu_to_le32(config);
3661         buf[2] = cpu_to_le32(info->sym_num);
3662         buf[3] = cpu_to_le32(info->ocon_num);
3663
3664         rc = put_entry(buf, sizeof(u32), 4, fp);
3665         if (rc)
3666                 return rc;
3667
3668         if (p->policyvers >= POLICYDB_VERSION_POLCAP) {
3669                 rc = ebitmap_write(&p->policycaps, fp);
3670                 if (rc)
3671                         return rc;
3672         }
3673
3674         if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE) {
3675                 rc = ebitmap_write(&p->permissive_map, fp);
3676                 if (rc)
3677                         return rc;
3678         }
3679
3680         num_syms = info->sym_num;
3681         for (i = 0; i < num_syms; i++) {
3682                 struct policy_data pd;
3683
3684                 pd.fp = fp;
3685                 pd.p = p;
3686
3687                 buf[0] = cpu_to_le32(p->symtab[i].nprim);
3688                 buf[1] = cpu_to_le32(p->symtab[i].table.nel);
3689
3690                 rc = put_entry(buf, sizeof(u32), 2, fp);
3691                 if (rc)
3692                         return rc;
3693                 rc = hashtab_map(&p->symtab[i].table, write_f[i], &pd);
3694                 if (rc)
3695                         return rc;
3696         }
3697
3698         rc = avtab_write(p, &p->te_avtab, fp);
3699         if (rc)
3700                 return rc;
3701
3702         rc = cond_write_list(p, fp);
3703         if (rc)
3704                 return rc;
3705
3706         rc = role_trans_write(p, fp);
3707         if (rc)
3708                 return rc;
3709
3710         rc = role_allow_write(p->role_allow, fp);
3711         if (rc)
3712                 return rc;
3713
3714         rc = filename_trans_write(p, fp);
3715         if (rc)
3716                 return rc;
3717
3718         rc = ocontext_write(p, info, fp);
3719         if (rc)
3720                 return rc;
3721
3722         rc = genfs_write(p, fp);
3723         if (rc)
3724                 return rc;
3725
3726         rc = range_write(p, fp);
3727         if (rc)
3728                 return rc;
3729
3730         for (i = 0; i < p->p_types.nprim; i++) {
3731                 struct ebitmap *e = &p->type_attr_map_array[i];
3732
3733                 rc = ebitmap_write(e, fp);
3734                 if (rc)
3735                         return rc;
3736         }
3737
3738         return 0;
3739 }