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                 goto out;
 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                         goto out;
 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                         goto out;
 901                 }
 902         }
 903         rc = 0;
 904 out:
 905         return rc;
 906 }
 907
 908 int policydb_class_isvalid(struct policydb *p, unsigned int class)
 909 {
 910         if (!class || class > p->p_classes.nprim)
 911                 return 0;
 912         return 1;
 913 }
 914
 915 int policydb_role_isvalid(struct policydb *p, unsigned int role)
 916 {
 917         if (!role || role > p->p_roles.nprim)
 918                 return 0;
 919         return 1;
 920 }
 921
 922 int policydb_type_isvalid(struct policydb *p, unsigned int type)
 923 {
 924         if (!type || type > p->p_types.nprim)
 925                 return 0;
 926         return 1;
 927 }
 928
 929 /*
 930  * Return 1 if the fields in the security context
 931  * structure `c' are valid.  Return 0 otherwise.
 932  */
 933 int policydb_context_isvalid(struct policydb *p, struct context *c)
 934 {
 935         struct role_datum *role;
 936         struct user_datum *usrdatum;
 937
 938         if (!c->role || c->role > p->p_roles.nprim)
 939                 return 0;
 940
 941         if (!c->user || c->user > p->p_users.nprim)
 942                 return 0;
 943
 944         if (!c->type || c->type > p->p_types.nprim)
 945                 return 0;
 946
 947         if (c->role != OBJECT_R_VAL) {
 948                 /*
 949                  * Role must be authorized for the type.
 950                  */
 951                 role = p->role_val_to_struct[c->role - 1];
 952                 if (!role || !ebitmap_get_bit(&role->types, c->type - 1))
 953                         /* role may not be associated with type */
 954                         return 0;
 955
 956                 /*
 957                  * User must be authorized for the role.
 958                  */
 959                 usrdatum = p->user_val_to_struct[c->user - 1];
 960                 if (!usrdatum)
 961                         return 0;
 962
 963                 if (!ebitmap_get_bit(&usrdatum->roles, c->role - 1))
 964                         /* user may not be associated with role */
 965                         return 0;
 966         }
 967
 968         if (!mls_context_isvalid(p, c))
 969                 return 0;
 970
 971         return 1;
 972 }
 973
 974 /*
 975  * Read a MLS range structure from a policydb binary
 976  * representation file.
 977  */
 978 static int mls_read_range_helper(struct mls_range *r, void *fp)
 979 {
 980         __le32 buf[2];
 981         u32 items;
 982         int rc;
 983
 984         rc = next_entry(buf, fp, sizeof(u32));
 985         if (rc)
 986                 goto out;
 987
 988         rc = -EINVAL;
 989         items = le32_to_cpu(buf[0]);
 990         if (items > ARRAY_SIZE(buf)) {
 991                 pr_err("SELinux: mls:  range overflow\n");
 992                 goto out;
 993         }
 994
 995         rc = next_entry(buf, fp, sizeof(u32) * items);
 996         if (rc) {
 997                 pr_err("SELinux: mls:  truncated range\n");
 998                 goto out;
 999         }
1000
1001         r->level[0].sens = le32_to_cpu(buf[0]);
1002         if (items > 1)
1003                 r->level[1].sens = le32_to_cpu(buf[1]);
1004         else
1005                 r->level[1].sens = r->level[0].sens;
1006
1007         rc = ebitmap_read(&r->level[0].cat, fp);
1008         if (rc) {
1009                 pr_err("SELinux: mls:  error reading low categories\n");
1010                 goto out;
1011         }
1012         if (items > 1) {
1013                 rc = ebitmap_read(&r->level[1].cat, fp);
1014                 if (rc) {
1015                         pr_err("SELinux: mls:  error reading high categories\n");
1016                         goto bad_high;
1017                 }
1018         } else {
1019                 rc = ebitmap_cpy(&r->level[1].cat, &r->level[0].cat);
1020                 if (rc) {
1021                         pr_err("SELinux: mls:  out of memory\n");
1022                         goto bad_high;
1023                 }
1024         }
1025
1026         return 0;
1027 bad_high:
1028         ebitmap_destroy(&r->level[0].cat);
1029 out:
1030         return rc;
1031 }
1032
1033 /*
1034  * Read and validate a security context structure
1035  * from a policydb binary representation file.
1036  */
1037 static int context_read_and_validate(struct context *c,
1038                                      struct policydb *p,
1039                                      void *fp)
1040 {
1041         __le32 buf[3];
1042         int rc;
1043
1044         rc = next_entry(buf, fp, sizeof buf);
1045         if (rc) {
1046                 pr_err("SELinux: context truncated\n");
1047                 goto out;
1048         }
1049         c->user = le32_to_cpu(buf[0]);
1050         c->role = le32_to_cpu(buf[1]);
1051         c->type = le32_to_cpu(buf[2]);
1052         if (p->policyvers >= POLICYDB_VERSION_MLS) {
1053                 rc = mls_read_range_helper(&c->range, fp);
1054                 if (rc) {
1055                         pr_err("SELinux: error reading MLS range of context\n");
1056                         goto out;
1057                 }
1058         }
1059
1060         rc = -EINVAL;
1061         if (!policydb_context_isvalid(p, c)) {
1062                 pr_err("SELinux:  invalid security context\n");
1063                 context_destroy(c);
1064                 goto out;
1065         }
1066         rc = 0;
1067 out:
1068         return rc;
1069 }
1070
1071 /*
1072  * The following *_read functions are used to
1073  * read the symbol data from a policy database
1074  * binary representation file.
1075  */
1076
1077 static int str_read(char **strp, gfp_t flags, void *fp, u32 len)
1078 {
1079         int rc;
1080         char *str;
1081
1082         if ((len == 0) || (len == (u32)-1))
1083                 return -EINVAL;
1084
1085         str = kmalloc(len + 1, flags | __GFP_NOWARN);
1086         if (!str)
1087                 return -ENOMEM;
1088
1089         rc = next_entry(str, fp, len);
1090         if (rc) {
1091                 kfree(str);
1092                 return rc;
1093         }
1094
1095         str[len] = '\0';
1096         *strp = str;
1097         return 0;
1098 }
1099
1100 static int perm_read(struct policydb *p, struct symtab *s, void *fp)
1101 {
1102         char *key = NULL;
1103         struct perm_datum *perdatum;
1104         int rc;
1105         __le32 buf[2];
1106         u32 len;
1107
1108         perdatum = kzalloc(sizeof(*perdatum), GFP_KERNEL);
1109         if (!perdatum)
1110                 return -ENOMEM;
1111
1112         rc = next_entry(buf, fp, sizeof buf);
1113         if (rc)
1114                 goto bad;
1115
1116         len = le32_to_cpu(buf[0]);
1117         perdatum->value = le32_to_cpu(buf[1]);
1118
1119         rc = str_read(&key, GFP_KERNEL, fp, len);
1120         if (rc)
1121                 goto bad;
1122
1123         rc = symtab_insert(s, key, perdatum);
1124         if (rc)
1125                 goto bad;
1126
1127         return 0;
1128 bad:
1129         perm_destroy(key, perdatum, NULL);
1130         return rc;
1131 }
1132
1133 static int common_read(struct policydb *p, struct symtab *s, void *fp)
1134 {
1135         char *key = NULL;
1136         struct common_datum *comdatum;
1137         __le32 buf[4];
1138         u32 len, nel;
1139         int i, rc;
1140
1141         comdatum = kzalloc(sizeof(*comdatum), GFP_KERNEL);
1142         if (!comdatum)
1143                 return -ENOMEM;
1144
1145         rc = next_entry(buf, fp, sizeof buf);
1146         if (rc)
1147                 goto bad;
1148
1149         len = le32_to_cpu(buf[0]);
1150         comdatum->value = le32_to_cpu(buf[1]);
1151         nel = le32_to_cpu(buf[3]);
1152
1153         rc = symtab_init(&comdatum->permissions, nel);
1154         if (rc)
1155                 goto bad;
1156         comdatum->permissions.nprim = le32_to_cpu(buf[2]);
1157
1158         rc = str_read(&key, GFP_KERNEL, fp, len);
1159         if (rc)
1160                 goto bad;
1161
1162         for (i = 0; i < nel; i++) {
1163                 rc = perm_read(p, &comdatum->permissions, fp);
1164                 if (rc)
1165                         goto bad;
1166         }
1167
1168         rc = symtab_insert(s, key, comdatum);
1169         if (rc)
1170                 goto bad;
1171         return 0;
1172 bad:
1173         common_destroy(key, comdatum, NULL);
1174         return rc;
1175 }
1176
1177 static void type_set_init(struct type_set *t)
1178 {
1179         ebitmap_init(&t->types);
1180         ebitmap_init(&t->negset);
1181 }
1182
1183 static int type_set_read(struct type_set *t, void *fp)
1184 {
1185         __le32 buf[1];
1186         int rc;
1187
1188         if (ebitmap_read(&t->types, fp))
1189                 return -EINVAL;
1190         if (ebitmap_read(&t->negset, fp))
1191                 return -EINVAL;
1192
1193         rc = next_entry(buf, fp, sizeof(u32));
1194         if (rc < 0)
1195                 return -EINVAL;
1196         t->flags = le32_to_cpu(buf[0]);
1197
1198         return 0;
1199 }
1200
1201
1202 static int read_cons_helper(struct policydb *p,
1203                                 struct constraint_node **nodep,
1204                                 int ncons, int allowxtarget, void *fp)
1205 {
1206         struct constraint_node *c, *lc;
1207         struct constraint_expr *e, *le;
1208         __le32 buf[3];
1209         u32 nexpr;
1210         int rc, i, j, depth;
1211
1212         lc = NULL;
1213         for (i = 0; i < ncons; i++) {
1214                 c = kzalloc(sizeof(*c), GFP_KERNEL);
1215                 if (!c)
1216                         return -ENOMEM;
1217
1218                 if (lc)
1219                         lc->next = c;
1220                 else
1221                         *nodep = c;
1222
1223                 rc = next_entry(buf, fp, (sizeof(u32) * 2));
1224                 if (rc)
1225                         return rc;
1226                 c->permissions = le32_to_cpu(buf[0]);
1227                 nexpr = le32_to_cpu(buf[1]);
1228                 le = NULL;
1229                 depth = -1;
1230                 for (j = 0; j < nexpr; j++) {
1231                         e = kzalloc(sizeof(*e), GFP_KERNEL);
1232                         if (!e)
1233                                 return -ENOMEM;
1234
1235                         if (le)
1236                                 le->next = e;
1237                         else
1238                                 c->expr = e;
1239
1240                         rc = next_entry(buf, fp, (sizeof(u32) * 3));
1241                         if (rc)
1242                                 return rc;
1243                         e->expr_type = le32_to_cpu(buf[0]);
1244                         e->attr = le32_to_cpu(buf[1]);
1245                         e->op = le32_to_cpu(buf[2]);
1246
1247                         switch (e->expr_type) {
1248                         case CEXPR_NOT:
1249                                 if (depth < 0)
1250                                         return -EINVAL;
1251                                 break;
1252                         case CEXPR_AND:
1253                         case CEXPR_OR:
1254                                 if (depth < 1)
1255                                         return -EINVAL;
1256                                 depth--;
1257                                 break;
1258                         case CEXPR_ATTR:
1259                                 if (depth == (CEXPR_MAXDEPTH - 1))
1260                                         return -EINVAL;
1261                                 depth++;
1262                                 break;
1263                         case CEXPR_NAMES:
1264                                 if (!allowxtarget && (e->attr & CEXPR_XTARGET))
1265                                         return -EINVAL;
1266                                 if (depth == (CEXPR_MAXDEPTH - 1))
1267                                         return -EINVAL;
1268                                 depth++;
1269                                 rc = ebitmap_read(&e->names, fp);
1270                                 if (rc)
1271                                         return rc;
1272                                 if (p->policyvers >=
1273                                     POLICYDB_VERSION_CONSTRAINT_NAMES) {
1274                                         e->type_names = kzalloc(sizeof
1275                                                 (*e->type_names), GFP_KERNEL);
1276                                         if (!e->type_names)
1277                                                 return -ENOMEM;
1278                                         type_set_init(e->type_names);
1279                                         rc = type_set_read(e->type_names, fp);
1280                                         if (rc)
1281                                                 return rc;
1282                                 }
1283                                 break;
1284                         default:
1285                                 return -EINVAL;
1286                         }
1287                         le = e;
1288                 }
1289                 if (depth != 0)
1290                         return -EINVAL;
1291                 lc = c;
1292         }
1293
1294         return 0;
1295 }
1296
1297 static int class_read(struct policydb *p, struct symtab *s, void *fp)
1298 {
1299         char *key = NULL;
1300         struct class_datum *cladatum;
1301         __le32 buf[6];
1302         u32 len, len2, ncons, nel;
1303         int i, rc;
1304
1305         cladatum = kzalloc(sizeof(*cladatum), GFP_KERNEL);
1306         if (!cladatum)
1307                 return -ENOMEM;
1308
1309         rc = next_entry(buf, fp, sizeof(u32)*6);
1310         if (rc)
1311                 goto bad;
1312
1313         len = le32_to_cpu(buf[0]);
1314         len2 = le32_to_cpu(buf[1]);
1315         cladatum->value = le32_to_cpu(buf[2]);
1316         nel = le32_to_cpu(buf[4]);
1317
1318         rc = symtab_init(&cladatum->permissions, nel);
1319         if (rc)
1320                 goto bad;
1321         cladatum->permissions.nprim = le32_to_cpu(buf[3]);
1322
1323         ncons = le32_to_cpu(buf[5]);
1324
1325         rc = str_read(&key, GFP_KERNEL, fp, len);
1326         if (rc)
1327                 goto bad;
1328
1329         if (len2) {
1330                 rc = str_read(&cladatum->comkey, GFP_KERNEL, fp, len2);
1331                 if (rc)
1332                         goto bad;
1333
1334                 rc = -EINVAL;
1335                 cladatum->comdatum = symtab_search(&p->p_commons,
1336                                                    cladatum->comkey);
1337                 if (!cladatum->comdatum) {
1338                         pr_err("SELinux:  unknown common %s\n",
1339                                cladatum->comkey);
1340                         goto bad;
1341                 }
1342         }
1343         for (i = 0; i < nel; i++) {
1344                 rc = perm_read(p, &cladatum->permissions, fp);
1345                 if (rc)
1346                         goto bad;
1347         }
1348
1349         rc = read_cons_helper(p, &cladatum->constraints, ncons, 0, fp);
1350         if (rc)
1351                 goto bad;
1352
1353         if (p->policyvers >= POLICYDB_VERSION_VALIDATETRANS) {
1354                 /* grab the validatetrans rules */
1355                 rc = next_entry(buf, fp, sizeof(u32));
1356                 if (rc)
1357                         goto bad;
1358                 ncons = le32_to_cpu(buf[0]);
1359                 rc = read_cons_helper(p, &cladatum->validatetrans,
1360                                 ncons, 1, fp);
1361                 if (rc)
1362                         goto bad;
1363         }
1364
1365         if (p->policyvers >= POLICYDB_VERSION_NEW_OBJECT_DEFAULTS) {
1366                 rc = next_entry(buf, fp, sizeof(u32) * 3);
1367                 if (rc)
1368                         goto bad;
1369
1370                 cladatum->default_user = le32_to_cpu(buf[0]);
1371                 cladatum->default_role = le32_to_cpu(buf[1]);
1372                 cladatum->default_range = le32_to_cpu(buf[2]);
1373         }
1374
1375         if (p->policyvers >= POLICYDB_VERSION_DEFAULT_TYPE) {
1376                 rc = next_entry(buf, fp, sizeof(u32) * 1);
1377                 if (rc)
1378                         goto bad;
1379                 cladatum->default_type = le32_to_cpu(buf[0]);
1380         }
1381
1382         rc = symtab_insert(s, key, cladatum);
1383         if (rc)
1384                 goto bad;
1385
1386         return 0;
1387 bad:
1388         cls_destroy(key, cladatum, NULL);
1389         return rc;
1390 }
1391
1392 static int role_read(struct policydb *p, struct symtab *s, void *fp)
1393 {
1394         char *key = NULL;
1395         struct role_datum *role;
1396         int rc, to_read = 2;
1397         __le32 buf[3];
1398         u32 len;
1399
1400         role = kzalloc(sizeof(*role), GFP_KERNEL);
1401         if (!role)
1402                 return -ENOMEM;
1403
1404         if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1405                 to_read = 3;
1406
1407         rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1408         if (rc)
1409                 goto bad;
1410
1411         len = le32_to_cpu(buf[0]);
1412         role->value = le32_to_cpu(buf[1]);
1413         if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1414                 role->bounds = le32_to_cpu(buf[2]);
1415
1416         rc = str_read(&key, GFP_KERNEL, fp, len);
1417         if (rc)
1418                 goto bad;
1419
1420         rc = ebitmap_read(&role->dominates, fp);
1421         if (rc)
1422                 goto bad;
1423
1424         rc = ebitmap_read(&role->types, fp);
1425         if (rc)
1426                 goto bad;
1427
1428         if (strcmp(key, OBJECT_R) == 0) {
1429                 rc = -EINVAL;
1430                 if (role->value != OBJECT_R_VAL) {
1431                         pr_err("SELinux: Role %s has wrong value %d\n",
1432                                OBJECT_R, role->value);
1433                         goto bad;
1434                 }
1435                 rc = 0;
1436                 goto bad;
1437         }
1438
1439         rc = symtab_insert(s, key, role);
1440         if (rc)
1441                 goto bad;
1442         return 0;
1443 bad:
1444         role_destroy(key, role, NULL);
1445         return rc;
1446 }
1447
1448 static int type_read(struct policydb *p, struct symtab *s, void *fp)
1449 {
1450         char *key = NULL;
1451         struct type_datum *typdatum;
1452         int rc, to_read = 3;
1453         __le32 buf[4];
1454         u32 len;
1455
1456         typdatum = kzalloc(sizeof(*typdatum), GFP_KERNEL);
1457         if (!typdatum)
1458                 return -ENOMEM;
1459
1460         if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1461                 to_read = 4;
1462
1463         rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1464         if (rc)
1465                 goto bad;
1466
1467         len = le32_to_cpu(buf[0]);
1468         typdatum->value = le32_to_cpu(buf[1]);
1469         if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) {
1470                 u32 prop = le32_to_cpu(buf[2]);
1471
1472                 if (prop & TYPEDATUM_PROPERTY_PRIMARY)
1473                         typdatum->primary = 1;
1474                 if (prop & TYPEDATUM_PROPERTY_ATTRIBUTE)
1475                         typdatum->attribute = 1;
1476
1477                 typdatum->bounds = le32_to_cpu(buf[3]);
1478         } else {
1479                 typdatum->primary = le32_to_cpu(buf[2]);
1480         }
1481
1482         rc = str_read(&key, GFP_KERNEL, fp, len);
1483         if (rc)
1484                 goto bad;
1485
1486         rc = symtab_insert(s, key, typdatum);
1487         if (rc)
1488                 goto bad;
1489         return 0;
1490 bad:
1491         type_destroy(key, typdatum, NULL);
1492         return rc;
1493 }
1494
1495
1496 /*
1497  * Read a MLS level structure from a policydb binary
1498  * representation file.
1499  */
1500 static int mls_read_level(struct mls_level *lp, void *fp)
1501 {
1502         __le32 buf[1];
1503         int rc;
1504
1505         memset(lp, 0, sizeof(*lp));
1506
1507         rc = next_entry(buf, fp, sizeof buf);
1508         if (rc) {
1509                 pr_err("SELinux: mls: truncated level\n");
1510                 return rc;
1511         }
1512         lp->sens = le32_to_cpu(buf[0]);
1513
1514         rc = ebitmap_read(&lp->cat, fp);
1515         if (rc) {
1516                 pr_err("SELinux: mls:  error reading level categories\n");
1517                 return rc;
1518         }
1519         return 0;
1520 }
1521
1522 static int user_read(struct policydb *p, struct symtab *s, void *fp)
1523 {
1524         char *key = NULL;
1525         struct user_datum *usrdatum;
1526         int rc, to_read = 2;
1527         __le32 buf[3];
1528         u32 len;
1529
1530         usrdatum = kzalloc(sizeof(*usrdatum), GFP_KERNEL);
1531         if (!usrdatum)
1532                 return -ENOMEM;
1533
1534         if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1535                 to_read = 3;
1536
1537         rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1538         if (rc)
1539                 goto bad;
1540
1541         len = le32_to_cpu(buf[0]);
1542         usrdatum->value = le32_to_cpu(buf[1]);
1543         if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1544                 usrdatum->bounds = le32_to_cpu(buf[2]);
1545
1546         rc = str_read(&key, GFP_KERNEL, fp, len);
1547         if (rc)
1548                 goto bad;
1549
1550         rc = ebitmap_read(&usrdatum->roles, fp);
1551         if (rc)
1552                 goto bad;
1553
1554         if (p->policyvers >= POLICYDB_VERSION_MLS) {
1555                 rc = mls_read_range_helper(&usrdatum->range, fp);
1556                 if (rc)
1557                         goto bad;
1558                 rc = mls_read_level(&usrdatum->dfltlevel, fp);
1559                 if (rc)
1560                         goto bad;
1561         }
1562
1563         rc = symtab_insert(s, key, usrdatum);
1564         if (rc)
1565                 goto bad;
1566         return 0;
1567 bad:
1568         user_destroy(key, usrdatum, NULL);
1569         return rc;
1570 }
1571
1572 static int sens_read(struct policydb *p, struct symtab *s, void *fp)
1573 {
1574         char *key = NULL;
1575         struct level_datum *levdatum;
1576         int rc;
1577         __le32 buf[2];
1578         u32 len;
1579
1580         levdatum = kzalloc(sizeof(*levdatum), GFP_ATOMIC);
1581         if (!levdatum)
1582                 return -ENOMEM;
1583
1584         rc = next_entry(buf, fp, sizeof buf);
1585         if (rc)
1586                 goto bad;
1587
1588         len = le32_to_cpu(buf[0]);
1589         levdatum->isalias = le32_to_cpu(buf[1]);
1590
1591         rc = str_read(&key, GFP_ATOMIC, fp, len);
1592         if (rc)
1593                 goto bad;
1594
1595         rc = -ENOMEM;
1596         levdatum->level = kmalloc(sizeof(*levdatum->level), GFP_ATOMIC);
1597         if (!levdatum->level)
1598                 goto bad;
1599
1600         rc = mls_read_level(levdatum->level, fp);
1601         if (rc)
1602                 goto bad;
1603
1604         rc = symtab_insert(s, key, levdatum);
1605         if (rc)
1606                 goto bad;
1607         return 0;
1608 bad:
1609         sens_destroy(key, levdatum, NULL);
1610         return rc;
1611 }
1612
1613 static int cat_read(struct policydb *p, struct symtab *s, void *fp)
1614 {
1615         char *key = NULL;
1616         struct cat_datum *catdatum;
1617         int rc;
1618         __le32 buf[3];
1619         u32 len;
1620
1621         catdatum = kzalloc(sizeof(*catdatum), GFP_ATOMIC);
1622         if (!catdatum)
1623                 return -ENOMEM;
1624
1625         rc = next_entry(buf, fp, sizeof buf);
1626         if (rc)
1627                 goto bad;
1628
1629         len = le32_to_cpu(buf[0]);
1630         catdatum->value = le32_to_cpu(buf[1]);
1631         catdatum->isalias = le32_to_cpu(buf[2]);
1632
1633         rc = str_read(&key, GFP_ATOMIC, fp, len);
1634         if (rc)
1635                 goto bad;
1636
1637         rc = symtab_insert(s, key, catdatum);
1638         if (rc)
1639                 goto bad;
1640         return 0;
1641 bad:
1642         cat_destroy(key, catdatum, NULL);
1643         return rc;
1644 }
1645
1646 static int (*read_f[SYM_NUM]) (struct policydb *p, struct symtab *s, void *fp) =
1647 {
1648         common_read,
1649         class_read,
1650         role_read,
1651         type_read,
1652         user_read,
1653         cond_read_bool,
1654         sens_read,
1655         cat_read,
1656 };
1657
1658 static int user_bounds_sanity_check(void *key, void *datum, void *datap)
1659 {
1660         struct user_datum *upper, *user;
1661         struct policydb *p = datap;
1662         int depth = 0;
1663
1664         upper = user = datum;
1665         while (upper->bounds) {
1666                 struct ebitmap_node *node;
1667                 unsigned long bit;
1668
1669                 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1670                         pr_err("SELinux: user %s: "
1671                                "too deep or looped boundary",
1672                                (char *) key);
1673                         return -EINVAL;
1674                 }
1675
1676                 upper = p->user_val_to_struct[upper->bounds - 1];
1677                 ebitmap_for_each_positive_bit(&user->roles, node, bit) {
1678                         if (ebitmap_get_bit(&upper->roles, bit))
1679                                 continue;
1680
1681                         pr_err("SELinux: boundary violated policy: "
1682                                "user=%s role=%s bounds=%s\n",
1683                                sym_name(p, SYM_USERS, user->value - 1),
1684                                sym_name(p, SYM_ROLES, bit),
1685                                sym_name(p, SYM_USERS, upper->value - 1));
1686
1687                         return -EINVAL;
1688                 }
1689         }
1690
1691         return 0;
1692 }
1693
1694 static int role_bounds_sanity_check(void *key, void *datum, void *datap)
1695 {
1696         struct role_datum *upper, *role;
1697         struct policydb *p = datap;
1698         int depth = 0;
1699
1700         upper = role = datum;
1701         while (upper->bounds) {
1702                 struct ebitmap_node *node;
1703                 unsigned long bit;
1704
1705                 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1706                         pr_err("SELinux: role %s: "
1707                                "too deep or looped bounds\n",
1708                                (char *) key);
1709                         return -EINVAL;
1710                 }
1711
1712                 upper = p->role_val_to_struct[upper->bounds - 1];
1713                 ebitmap_for_each_positive_bit(&role->types, node, bit) {
1714                         if (ebitmap_get_bit(&upper->types, bit))
1715                                 continue;
1716
1717                         pr_err("SELinux: boundary violated policy: "
1718                                "role=%s type=%s bounds=%s\n",
1719                                sym_name(p, SYM_ROLES, role->value - 1),
1720                                sym_name(p, SYM_TYPES, bit),
1721                                sym_name(p, SYM_ROLES, upper->value - 1));
1722
1723                         return -EINVAL;
1724                 }
1725         }
1726
1727         return 0;
1728 }
1729
1730 static int type_bounds_sanity_check(void *key, void *datum, void *datap)
1731 {
1732         struct type_datum *upper;
1733         struct policydb *p = datap;
1734         int depth = 0;
1735
1736         upper = datum;
1737         while (upper->bounds) {
1738                 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1739                         pr_err("SELinux: type %s: "
1740                                "too deep or looped boundary\n",
1741                                (char *) key);
1742                         return -EINVAL;
1743                 }
1744
1745                 upper = p->type_val_to_struct[upper->bounds - 1];
1746                 BUG_ON(!upper);
1747
1748                 if (upper->attribute) {
1749                         pr_err("SELinux: type %s: "
1750                                "bounded by attribute %s",
1751                                (char *) key,
1752                                sym_name(p, SYM_TYPES, upper->value - 1));
1753                         return -EINVAL;
1754                 }
1755         }
1756
1757         return 0;
1758 }
1759
1760 static int policydb_bounds_sanity_check(struct policydb *p)
1761 {
1762         int rc;
1763
1764         if (p->policyvers < POLICYDB_VERSION_BOUNDARY)
1765                 return 0;
1766
1767         rc = hashtab_map(&p->p_users.table, user_bounds_sanity_check, p);
1768         if (rc)
1769                 return rc;
1770
1771         rc = hashtab_map(&p->p_roles.table, role_bounds_sanity_check, p);
1772         if (rc)
1773                 return rc;
1774
1775         rc = hashtab_map(&p->p_types.table, type_bounds_sanity_check, p);
1776         if (rc)
1777                 return rc;
1778
1779         return 0;
1780 }
1781
1782 u16 string_to_security_class(struct policydb *p, const char *name)
1783 {
1784         struct class_datum *cladatum;
1785
1786         cladatum = symtab_search(&p->p_classes, name);
1787         if (!cladatum)
1788                 return 0;
1789
1790         return cladatum->value;
1791 }
1792
1793 u32 string_to_av_perm(struct policydb *p, u16 tclass, const char *name)
1794 {
1795         struct class_datum *cladatum;
1796         struct perm_datum *perdatum = NULL;
1797         struct common_datum *comdatum;
1798
1799         if (!tclass || tclass > p->p_classes.nprim)
1800                 return 0;
1801
1802         cladatum = p->class_val_to_struct[tclass-1];
1803         comdatum = cladatum->comdatum;
1804         if (comdatum)
1805                 perdatum = symtab_search(&comdatum->permissions, name);
1806         if (!perdatum)
1807                 perdatum = symtab_search(&cladatum->permissions, name);
1808         if (!perdatum)
1809                 return 0;
1810
1811         return 1U << (perdatum->value-1);
1812 }
1813
1814 static int range_read(struct policydb *p, void *fp)
1815 {
1816         struct range_trans *rt = NULL;
1817         struct mls_range *r = NULL;
1818         int i, rc;
1819         __le32 buf[2];
1820         u32 nel;
1821
1822         if (p->policyvers < POLICYDB_VERSION_MLS)
1823                 return 0;
1824
1825         rc = next_entry(buf, fp, sizeof(u32));
1826         if (rc)
1827                 return rc;
1828
1829         nel = le32_to_cpu(buf[0]);
1830
1831         rc = hashtab_init(&p->range_tr, nel);
1832         if (rc)
1833                 return rc;
1834
1835         for (i = 0; i < nel; i++) {
1836                 rc = -ENOMEM;
1837                 rt = kzalloc(sizeof(*rt), GFP_KERNEL);
1838                 if (!rt)
1839                         goto out;
1840
1841                 rc = next_entry(buf, fp, (sizeof(u32) * 2));
1842                 if (rc)
1843                         goto out;
1844
1845                 rt->source_type = le32_to_cpu(buf[0]);
1846                 rt->target_type = le32_to_cpu(buf[1]);
1847                 if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) {
1848                         rc = next_entry(buf, fp, sizeof(u32));
1849                         if (rc)
1850                                 goto out;
1851                         rt->target_class = le32_to_cpu(buf[0]);
1852                 } else
1853                         rt->target_class = p->process_class;
1854
1855                 rc = -EINVAL;
1856                 if (!policydb_type_isvalid(p, rt->source_type) ||
1857                     !policydb_type_isvalid(p, rt->target_type) ||
1858                     !policydb_class_isvalid(p, rt->target_class))
1859                         goto out;
1860
1861                 rc = -ENOMEM;
1862                 r = kzalloc(sizeof(*r), GFP_KERNEL);
1863                 if (!r)
1864                         goto out;
1865
1866                 rc = mls_read_range_helper(r, fp);
1867                 if (rc)
1868                         goto out;
1869
1870                 rc = -EINVAL;
1871                 if (!mls_range_isvalid(p, r)) {
1872                         pr_warn("SELinux:  rangetrans:  invalid range\n");
1873                         goto out;
1874                 }
1875
1876                 rc = hashtab_insert(&p->range_tr, rt, r, rangetr_key_params);
1877                 if (rc)
1878                         goto out;
1879
1880                 rt = NULL;
1881                 r = NULL;
1882         }
1883         hash_eval(&p->range_tr, "rangetr");
1884         rc = 0;
1885 out:
1886         kfree(rt);
1887         kfree(r);
1888         return rc;
1889 }
1890
1891 static int filename_trans_read_helper_compat(struct policydb *p, void *fp)
1892 {
1893         struct filename_trans_key key, *ft = NULL;
1894         struct filename_trans_datum *last, *datum = NULL;
1895         char *name = NULL;
1896         u32 len, stype, otype;
1897         __le32 buf[4];
1898         int rc;
1899
1900         /* length of the path component string */
1901         rc = next_entry(buf, fp, sizeof(u32));
1902         if (rc)
1903                 return rc;
1904         len = le32_to_cpu(buf[0]);
1905
1906         /* path component string */
1907         rc = str_read(&name, GFP_KERNEL, fp, len);
1908         if (rc)
1909                 return rc;
1910
1911         rc = next_entry(buf, fp, sizeof(u32) * 4);
1912         if (rc)
1913                 goto out;
1914
1915         stype = le32_to_cpu(buf[0]);
1916         key.ttype = le32_to_cpu(buf[1]);
1917         key.tclass = le32_to_cpu(buf[2]);
1918         key.name = name;
1919
1920         otype = le32_to_cpu(buf[3]);
1921
1922         last = NULL;
1923         datum = policydb_filenametr_search(p, &key);
1924         while (datum) {
1925                 if (unlikely(ebitmap_get_bit(&datum->stypes, stype - 1))) {
1926                         /* conflicting/duplicate rules are ignored */
1927                         datum = NULL;
1928                         goto out;
1929                 }
1930                 if (likely(datum->otype == otype))
1931                         break;
1932                 last = datum;
1933                 datum = datum->next;
1934         }
1935         if (!datum) {
1936                 rc = -ENOMEM;
1937                 datum = kmalloc(sizeof(*datum), GFP_KERNEL);
1938                 if (!datum)
1939                         goto out;
1940
1941                 ebitmap_init(&datum->stypes);
1942                 datum->otype = otype;
1943                 datum->next = NULL;
1944
1945                 if (unlikely(last)) {
1946                         last->next = datum;
1947                 } else {
1948                         rc = -ENOMEM;
1949                         ft = kmemdup(&key, sizeof(key), GFP_KERNEL);
1950                         if (!ft)
1951                                 goto out;
1952
1953                         rc = hashtab_insert(&p->filename_trans, ft, datum,
1954                                             filenametr_key_params);
1955                         if (rc)
1956                                 goto out;
1957                         name = NULL;
1958
1959                         rc = ebitmap_set_bit(&p->filename_trans_ttypes,
1960                                              key.ttype, 1);
1961                         if (rc)
1962                                 return rc;
1963                 }
1964         }
1965         kfree(name);
1966         return ebitmap_set_bit(&datum->stypes, stype - 1, 1);
1967
1968 out:
1969         kfree(ft);
1970         kfree(name);
1971         kfree(datum);
1972         return rc;
1973 }
1974
1975 static int filename_trans_read_helper(struct policydb *p, void *fp)
1976 {
1977         struct filename_trans_key *ft = NULL;
1978         struct filename_trans_datum **dst, *datum, *first = NULL;
1979         char *name = NULL;
1980         u32 len, ttype, tclass, ndatum, i;
1981         __le32 buf[3];
1982         int rc;
1983
1984         /* length of the path component string */
1985         rc = next_entry(buf, fp, sizeof(u32));
1986         if (rc)
1987                 return rc;
1988         len = le32_to_cpu(buf[0]);
1989
1990         /* path component string */
1991         rc = str_read(&name, GFP_KERNEL, fp, len);
1992         if (rc)
1993                 return rc;
1994
1995         rc = next_entry(buf, fp, sizeof(u32) * 3);
1996         if (rc)
1997                 goto out;
1998
1999         ttype = le32_to_cpu(buf[0]);
2000         tclass = le32_to_cpu(buf[1]);
2001
2002         ndatum = le32_to_cpu(buf[2]);
2003         if (ndatum == 0) {
2004                 pr_err("SELinux:  Filename transition key with no datum\n");
2005                 rc = -ENOENT;
2006                 goto out;
2007         }
2008
2009         dst = &first;
2010         for (i = 0; i < ndatum; i++) {
2011                 rc = -ENOMEM;
2012                 datum = kmalloc(sizeof(*datum), GFP_KERNEL);
2013                 if (!datum)
2014                         goto out;
2015
2016                 *dst = datum;
2017
2018                 /* ebitmap_read() will at least init the bitmap */
2019                 rc = ebitmap_read(&datum->stypes, fp);
2020                 if (rc)
2021                         goto out;
2022
2023                 rc = next_entry(buf, fp, sizeof(u32));
2024                 if (rc)
2025                         goto out;
2026
2027                 datum->otype = le32_to_cpu(buf[0]);
2028                 datum->next = NULL;
2029
2030                 dst = &datum->next;
2031         }
2032
2033         rc = -ENOMEM;
2034         ft = kmalloc(sizeof(*ft), GFP_KERNEL);
2035         if (!ft)
2036                 goto out;
2037
2038         ft->ttype = ttype;
2039         ft->tclass = tclass;
2040         ft->name = name;
2041
2042         rc = hashtab_insert(&p->filename_trans, ft, first,
2043                             filenametr_key_params);
2044         if (rc == -EEXIST)
2045                 pr_err("SELinux:  Duplicate filename transition key\n");
2046         if (rc)
2047                 goto out;
2048
2049         return ebitmap_set_bit(&p->filename_trans_ttypes, ttype, 1);
2050
2051 out:
2052         kfree(ft);
2053         kfree(name);
2054         while (first) {
2055                 datum = first;
2056                 first = first->next;
2057
2058                 ebitmap_destroy(&datum->stypes);
2059                 kfree(datum);
2060         }
2061         return rc;
2062 }
2063
2064 static int filename_trans_read(struct policydb *p, void *fp)
2065 {
2066         u32 nel;
2067         __le32 buf[1];
2068         int rc, i;
2069
2070         if (p->policyvers < POLICYDB_VERSION_FILENAME_TRANS)
2071                 return 0;
2072
2073         rc = next_entry(buf, fp, sizeof(u32));
2074         if (rc)
2075                 return rc;
2076         nel = le32_to_cpu(buf[0]);
2077
2078         if (p->policyvers < POLICYDB_VERSION_COMP_FTRANS) {
2079                 p->compat_filename_trans_count = nel;
2080
2081                 rc = hashtab_init(&p->filename_trans, (1 << 11));
2082                 if (rc)
2083                         return rc;
2084
2085                 for (i = 0; i < nel; i++) {
2086                         rc = filename_trans_read_helper_compat(p, fp);
2087                         if (rc)
2088                                 return rc;
2089                 }
2090         } else {
2091                 rc = hashtab_init(&p->filename_trans, nel);
2092                 if (rc)
2093                         return rc;
2094
2095                 for (i = 0; i < nel; i++) {
2096                         rc = filename_trans_read_helper(p, fp);
2097                         if (rc)
2098                                 return rc;
2099                 }
2100         }
2101         hash_eval(&p->filename_trans, "filenametr");
2102         return 0;
2103 }
2104
2105 static int genfs_read(struct policydb *p, void *fp)
2106 {
2107         int i, j, rc;
2108         u32 nel, nel2, len, len2;
2109         __le32 buf[1];
2110         struct ocontext *l, *c;
2111         struct ocontext *newc = NULL;
2112         struct genfs *genfs_p, *genfs;
2113         struct genfs *newgenfs = NULL;
2114
2115         rc = next_entry(buf, fp, sizeof(u32));
2116         if (rc)
2117                 return rc;
2118         nel = le32_to_cpu(buf[0]);
2119
2120         for (i = 0; i < nel; i++) {
2121                 rc = next_entry(buf, fp, sizeof(u32));
2122                 if (rc)
2123                         goto out;
2124                 len = le32_to_cpu(buf[0]);
2125
2126                 rc = -ENOMEM;
2127                 newgenfs = kzalloc(sizeof(*newgenfs), GFP_KERNEL);
2128                 if (!newgenfs)
2129                         goto out;
2130
2131                 rc = str_read(&newgenfs->fstype, GFP_KERNEL, fp, len);
2132                 if (rc)
2133                         goto out;
2134
2135                 for (genfs_p = NULL, genfs = p->genfs; genfs;
2136                      genfs_p = genfs, genfs = genfs->next) {
2137                         rc = -EINVAL;
2138                         if (strcmp(newgenfs->fstype, genfs->fstype) == 0) {
2139                                 pr_err("SELinux:  dup genfs fstype %s\n",
2140                                        newgenfs->fstype);
2141                                 goto out;
2142                         }
2143                         if (strcmp(newgenfs->fstype, genfs->fstype) < 0)
2144                                 break;
2145                 }
2146                 newgenfs->next = genfs;
2147                 if (genfs_p)
2148                         genfs_p->next = newgenfs;
2149                 else
2150                         p->genfs = newgenfs;
2151                 genfs = newgenfs;
2152                 newgenfs = NULL;
2153
2154                 rc = next_entry(buf, fp, sizeof(u32));
2155                 if (rc)
2156                         goto out;
2157
2158                 nel2 = le32_to_cpu(buf[0]);
2159                 for (j = 0; j < nel2; j++) {
2160                         rc = next_entry(buf, fp, sizeof(u32));
2161                         if (rc)
2162                                 goto out;
2163                         len = le32_to_cpu(buf[0]);
2164
2165                         rc = -ENOMEM;
2166                         newc = kzalloc(sizeof(*newc), GFP_KERNEL);
2167                         if (!newc)
2168                                 goto out;
2169
2170                         rc = str_read(&newc->u.name, GFP_KERNEL, fp, len);
2171                         if (rc)
2172                                 goto out;
2173
2174                         rc = next_entry(buf, fp, sizeof(u32));
2175                         if (rc)
2176                                 goto out;
2177
2178                         newc->v.sclass = le32_to_cpu(buf[0]);
2179                         rc = context_read_and_validate(&newc->context[0], p, fp);
2180                         if (rc)
2181                                 goto out;
2182
2183                         for (l = NULL, c = genfs->head; c;
2184                              l = c, c = c->next) {
2185                                 rc = -EINVAL;
2186                                 if (!strcmp(newc->u.name, c->u.name) &&
2187                                     (!c->v.sclass || !newc->v.sclass ||
2188                                      newc->v.sclass == c->v.sclass)) {
2189                                         pr_err("SELinux:  dup genfs entry (%s,%s)\n",
2190                                                genfs->fstype, c->u.name);
2191                                         goto out;
2192                                 }
2193                                 len = strlen(newc->u.name);
2194                                 len2 = strlen(c->u.name);
2195                                 if (len > len2)
2196                                         break;
2197                         }
2198
2199                         newc->next = c;
2200                         if (l)
2201                                 l->next = newc;
2202                         else
2203                                 genfs->head = newc;
2204                         newc = NULL;
2205                 }
2206         }
2207         rc = 0;
2208 out:
2209         if (newgenfs) {
2210                 kfree(newgenfs->fstype);
2211                 kfree(newgenfs);
2212         }
2213         ocontext_destroy(newc, OCON_FSUSE);
2214
2215         return rc;
2216 }
2217
2218 static int ocontext_read(struct policydb *p, struct policydb_compat_info *info,
2219                          void *fp)
2220 {
2221         int i, j, rc;
2222         u32 nel, len;
2223         __be64 prefixbuf[1];
2224         __le32 buf[3];
2225         struct ocontext *l, *c;
2226         u32 nodebuf[8];
2227
2228         for (i = 0; i < info->ocon_num; i++) {
2229                 rc = next_entry(buf, fp, sizeof(u32));
2230                 if (rc)
2231                         goto out;
2232                 nel = le32_to_cpu(buf[0]);
2233
2234                 l = NULL;
2235                 for (j = 0; j < nel; j++) {
2236                         rc = -ENOMEM;
2237                         c = kzalloc(sizeof(*c), GFP_KERNEL);
2238                         if (!c)
2239                                 goto out;
2240                         if (l)
2241                                 l->next = c;
2242                         else
2243                                 p->ocontexts[i] = c;
2244                         l = c;
2245
2246                         switch (i) {
2247                         case OCON_ISID:
2248                                 rc = next_entry(buf, fp, sizeof(u32));
2249                                 if (rc)
2250                                         goto out;
2251
2252                                 c->sid[0] = le32_to_cpu(buf[0]);
2253                                 rc = context_read_and_validate(&c->context[0], p, fp);
2254                                 if (rc)
2255                                         goto out;
2256                                 break;
2257                         case OCON_FS:
2258                         case OCON_NETIF:
2259                                 rc = next_entry(buf, fp, sizeof(u32));
2260                                 if (rc)
2261                                         goto out;
2262                                 len = le32_to_cpu(buf[0]);
2263
2264                                 rc = str_read(&c->u.name, GFP_KERNEL, fp, len);
2265                                 if (rc)
2266                                         goto out;
2267
2268                                 rc = context_read_and_validate(&c->context[0], p, fp);
2269                                 if (rc)
2270                                         goto out;
2271                                 rc = context_read_and_validate(&c->context[1], p, fp);
2272                                 if (rc)
2273                                         goto out;
2274                                 break;
2275                         case OCON_PORT:
2276                                 rc = next_entry(buf, fp, sizeof(u32)*3);
2277                                 if (rc)
2278                                         goto out;
2279                                 c->u.port.protocol = le32_to_cpu(buf[0]);
2280                                 c->u.port.low_port = le32_to_cpu(buf[1]);
2281                                 c->u.port.high_port = le32_to_cpu(buf[2]);
2282                                 rc = context_read_and_validate(&c->context[0], p, fp);
2283                                 if (rc)
2284                                         goto out;
2285                                 break;
2286                         case OCON_NODE:
2287                                 rc = next_entry(nodebuf, fp, sizeof(u32) * 2);
2288                                 if (rc)
2289                                         goto out;
2290                                 c->u.node.addr = nodebuf[0]; /* network order */
2291                                 c->u.node.mask = nodebuf[1]; /* network order */
2292                                 rc = context_read_and_validate(&c->context[0], p, fp);
2293                                 if (rc)
2294                                         goto out;
2295                                 break;
2296                         case OCON_FSUSE:
2297                                 rc = next_entry(buf, fp, sizeof(u32)*2);
2298                                 if (rc)
2299                                         goto out;
2300
2301                                 rc = -EINVAL;
2302                                 c->v.behavior = le32_to_cpu(buf[0]);
2303                                 /* Determined at runtime, not in policy DB. */
2304                                 if (c->v.behavior == SECURITY_FS_USE_MNTPOINT)
2305                                         goto out;
2306                                 if (c->v.behavior > SECURITY_FS_USE_MAX)
2307                                         goto out;
2308
2309                                 len = le32_to_cpu(buf[1]);
2310                                 rc = str_read(&c->u.name, GFP_KERNEL, fp, len);
2311                                 if (rc)
2312                                         goto out;
2313
2314                                 rc = context_read_and_validate(&c->context[0], p, fp);
2315                                 if (rc)
2316                                         goto out;
2317                                 break;
2318                         case OCON_NODE6: {
2319                                 int k;
2320
2321                                 rc = next_entry(nodebuf, fp, sizeof(u32) * 8);
2322                                 if (rc)
2323                                         goto out;
2324                                 for (k = 0; k < 4; k++)
2325                                         c->u.node6.addr[k] = nodebuf[k];
2326                                 for (k = 0; k < 4; k++)
2327                                         c->u.node6.mask[k] = nodebuf[k+4];
2328                                 rc = context_read_and_validate(&c->context[0], p, fp);
2329                                 if (rc)
2330                                         goto out;
2331                                 break;
2332                         }
2333                         case OCON_IBPKEY: {
2334                                 u32 pkey_lo, pkey_hi;
2335
2336                                 rc = next_entry(prefixbuf, fp, sizeof(u64));
2337                                 if (rc)
2338                                         goto out;
2339
2340                                 /* we need to have subnet_prefix in CPU order */
2341                                 c->u.ibpkey.subnet_prefix = be64_to_cpu(prefixbuf[0]);
2342
2343                                 rc = next_entry(buf, fp, sizeof(u32) * 2);
2344                                 if (rc)
2345                                         goto out;
2346
2347                                 pkey_lo = le32_to_cpu(buf[0]);
2348                                 pkey_hi = le32_to_cpu(buf[1]);
2349
2350                                 if (pkey_lo > U16_MAX || pkey_hi > U16_MAX) {
2351                                         rc = -EINVAL;
2352                                         goto out;
2353                                 }
2354
2355                                 c->u.ibpkey.low_pkey  = pkey_lo;
2356                                 c->u.ibpkey.high_pkey = pkey_hi;
2357
2358                                 rc = context_read_and_validate(&c->context[0],
2359                                                                p,
2360                                                                fp);
2361                                 if (rc)
2362                                         goto out;
2363                                 break;
2364                         }
2365                         case OCON_IBENDPORT: {
2366                                 u32 port;
2367
2368                                 rc = next_entry(buf, fp, sizeof(u32) * 2);
2369                                 if (rc)
2370                                         goto out;
2371                                 len = le32_to_cpu(buf[0]);
2372
2373                                 rc = str_read(&c->u.ibendport.dev_name, GFP_KERNEL, fp, len);
2374                                 if (rc)
2375                                         goto out;
2376
2377                                 port = le32_to_cpu(buf[1]);
2378                                 if (port > U8_MAX || port == 0) {
2379                                         rc = -EINVAL;
2380                                         goto out;
2381                                 }
2382
2383                                 c->u.ibendport.port = port;
2384
2385                                 rc = context_read_and_validate(&c->context[0],
2386                                                                p,
2387                                                                fp);
2388                                 if (rc)
2389                                         goto out;
2390                                 break;
2391                         } /* end case */
2392                         } /* end switch */
2393                 }
2394         }
2395         rc = 0;
2396 out:
2397         return rc;
2398 }
2399
2400 /*
2401  * Read the configuration data from a policy database binary
2402  * representation file into a policy database structure.
2403  */
2404 int policydb_read(struct policydb *p, void *fp)
2405 {
2406         struct role_allow *ra, *lra;
2407         struct role_trans_key *rtk = NULL;
2408         struct role_trans_datum *rtd = NULL;
2409         int i, j, rc;
2410         __le32 buf[4];
2411         u32 len, nprim, nel, perm;
2412
2413         char *policydb_str;
2414         struct policydb_compat_info *info;
2415
2416         policydb_init(p);
2417
2418         /* Read the magic number and string length. */
2419         rc = next_entry(buf, fp, sizeof(u32) * 2);
2420         if (rc)
2421                 goto bad;
2422
2423         rc = -EINVAL;
2424         if (le32_to_cpu(buf[0]) != POLICYDB_MAGIC) {
2425                 pr_err("SELinux:  policydb magic number 0x%x does "
2426                        "not match expected magic number 0x%x\n",
2427                        le32_to_cpu(buf[0]), POLICYDB_MAGIC);
2428                 goto bad;
2429         }
2430
2431         rc = -EINVAL;
2432         len = le32_to_cpu(buf[1]);
2433         if (len != strlen(POLICYDB_STRING)) {
2434                 pr_err("SELinux:  policydb string length %d does not "
2435                        "match expected length %zu\n",
2436                        len, strlen(POLICYDB_STRING));
2437                 goto bad;
2438         }
2439
2440         rc = -ENOMEM;
2441         policydb_str = kmalloc(len + 1, GFP_KERNEL);
2442         if (!policydb_str) {
2443                 pr_err("SELinux:  unable to allocate memory for policydb "
2444                        "string of length %d\n", len);
2445                 goto bad;
2446         }
2447
2448         rc = next_entry(policydb_str, fp, len);
2449         if (rc) {
2450                 pr_err("SELinux:  truncated policydb string identifier\n");
2451                 kfree(policydb_str);
2452                 goto bad;
2453         }
2454
2455         rc = -EINVAL;
2456         policydb_str[len] = '\0';
2457         if (strcmp(policydb_str, POLICYDB_STRING)) {
2458                 pr_err("SELinux:  policydb string %s does not match "
2459                        "my string %s\n", policydb_str, POLICYDB_STRING);
2460                 kfree(policydb_str);
2461                 goto bad;
2462         }
2463         /* Done with policydb_str. */
2464         kfree(policydb_str);
2465         policydb_str = NULL;
2466
2467         /* Read the version and table sizes. */
2468         rc = next_entry(buf, fp, sizeof(u32)*4);
2469         if (rc)
2470                 goto bad;
2471
2472         rc = -EINVAL;
2473         p->policyvers = le32_to_cpu(buf[0]);
2474         if (p->policyvers < POLICYDB_VERSION_MIN ||
2475             p->policyvers > POLICYDB_VERSION_MAX) {
2476                 pr_err("SELinux:  policydb version %d does not match "
2477                        "my version range %d-%d\n",
2478                        le32_to_cpu(buf[0]), POLICYDB_VERSION_MIN, POLICYDB_VERSION_MAX);
2479                 goto bad;
2480         }
2481
2482         if ((le32_to_cpu(buf[1]) & POLICYDB_CONFIG_MLS)) {
2483                 p->mls_enabled = 1;
2484
2485                 rc = -EINVAL;
2486                 if (p->policyvers < POLICYDB_VERSION_MLS) {
2487                         pr_err("SELinux: security policydb version %d "
2488                                 "(MLS) not backwards compatible\n",
2489                                 p->policyvers);
2490                         goto bad;
2491                 }
2492         }
2493         p->reject_unknown = !!(le32_to_cpu(buf[1]) & REJECT_UNKNOWN);
2494         p->allow_unknown = !!(le32_to_cpu(buf[1]) & ALLOW_UNKNOWN);
2495
2496         if (p->policyvers >= POLICYDB_VERSION_POLCAP) {
2497                 rc = ebitmap_read(&p->policycaps, fp);
2498                 if (rc)
2499                         goto bad;
2500         }
2501
2502         if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE) {
2503                 rc = ebitmap_read(&p->permissive_map, fp);
2504                 if (rc)
2505                         goto bad;
2506         }
2507
2508         rc = -EINVAL;
2509         info = policydb_lookup_compat(p->policyvers);
2510         if (!info) {
2511                 pr_err("SELinux:  unable to find policy compat info "
2512                        "for version %d\n", p->policyvers);
2513                 goto bad;
2514         }
2515
2516         rc = -EINVAL;
2517         if (le32_to_cpu(buf[2]) != info->sym_num ||
2518                 le32_to_cpu(buf[3]) != info->ocon_num) {
2519                 pr_err("SELinux:  policydb table sizes (%d,%d) do "
2520                        "not match mine (%d,%d)\n", le32_to_cpu(buf[2]),
2521                         le32_to_cpu(buf[3]),
2522                        info->sym_num, info->ocon_num);
2523                 goto bad;
2524         }
2525
2526         for (i = 0; i < info->sym_num; i++) {
2527                 rc = next_entry(buf, fp, sizeof(u32)*2);
2528                 if (rc)
2529                         goto bad;
2530                 nprim = le32_to_cpu(buf[0]);
2531                 nel = le32_to_cpu(buf[1]);
2532
2533                 rc = symtab_init(&p->symtab[i], nel);
2534                 if (rc)
2535                         goto out;
2536
2537                 if (i == SYM_ROLES) {
2538                         rc = roles_init(p);
2539                         if (rc)
2540                                 goto out;
2541                 }
2542
2543                 for (j = 0; j < nel; j++) {
2544                         rc = read_f[i](p, &p->symtab[i], fp);
2545                         if (rc)
2546                                 goto bad;
2547                 }
2548
2549                 p->symtab[i].nprim = nprim;
2550         }
2551
2552         rc = -EINVAL;
2553         p->process_class = string_to_security_class(p, "process");
2554         if (!p->process_class) {
2555                 pr_err("SELinux: process class is required, not defined in policy\n");
2556                 goto bad;
2557         }
2558
2559         rc = avtab_read(&p->te_avtab, fp, p);
2560         if (rc)
2561                 goto bad;
2562
2563         if (p->policyvers >= POLICYDB_VERSION_BOOL) {
2564                 rc = cond_read_list(p, fp);
2565                 if (rc)
2566                         goto bad;
2567         }
2568
2569         rc = next_entry(buf, fp, sizeof(u32));
2570         if (rc)
2571                 goto bad;
2572         nel = le32_to_cpu(buf[0]);
2573
2574         rc = hashtab_init(&p->role_tr, nel);
2575         if (rc)
2576                 goto bad;
2577         for (i = 0; i < nel; i++) {
2578                 rc = -ENOMEM;
2579                 rtk = kmalloc(sizeof(*rtk), GFP_KERNEL);
2580                 if (!rtk)
2581                         goto bad;
2582
2583                 rc = -ENOMEM;
2584                 rtd = kmalloc(sizeof(*rtd), GFP_KERNEL);
2585                 if (!rtd)
2586                         goto bad;
2587
2588                 rc = next_entry(buf, fp, sizeof(u32)*3);
2589                 if (rc)
2590                         goto bad;
2591
2592                 rc = -EINVAL;
2593                 rtk->role = le32_to_cpu(buf[0]);
2594                 rtk->type = le32_to_cpu(buf[1]);
2595                 rtd->new_role = le32_to_cpu(buf[2]);
2596                 if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) {
2597                         rc = next_entry(buf, fp, sizeof(u32));
2598                         if (rc)
2599                                 goto bad;
2600                         rtk->tclass = le32_to_cpu(buf[0]);
2601                 } else
2602                         rtk->tclass = p->process_class;
2603
2604                 rc = -EINVAL;
2605                 if (!policydb_role_isvalid(p, rtk->role) ||
2606                     !policydb_type_isvalid(p, rtk->type) ||
2607                     !policydb_class_isvalid(p, rtk->tclass) ||
2608                     !policydb_role_isvalid(p, rtd->new_role))
2609                         goto bad;
2610
2611                 rc = hashtab_insert(&p->role_tr, rtk, rtd, roletr_key_params);
2612                 if (rc)
2613                         goto bad;
2614
2615                 rtk = NULL;
2616                 rtd = NULL;
2617         }
2618
2619         rc = next_entry(buf, fp, sizeof(u32));
2620         if (rc)
2621                 goto bad;
2622         nel = le32_to_cpu(buf[0]);
2623         lra = NULL;
2624         for (i = 0; i < nel; i++) {
2625                 rc = -ENOMEM;
2626                 ra = kzalloc(sizeof(*ra), GFP_KERNEL);
2627                 if (!ra)
2628                         goto bad;
2629                 if (lra)
2630                         lra->next = ra;
2631                 else
2632                         p->role_allow = ra;
2633                 rc = next_entry(buf, fp, sizeof(u32)*2);
2634                 if (rc)
2635                         goto bad;
2636
2637                 rc = -EINVAL;
2638                 ra->role = le32_to_cpu(buf[0]);
2639                 ra->new_role = le32_to_cpu(buf[1]);
2640                 if (!policydb_role_isvalid(p, ra->role) ||
2641                     !policydb_role_isvalid(p, ra->new_role))
2642                         goto bad;
2643                 lra = ra;
2644         }
2645
2646         rc = filename_trans_read(p, fp);
2647         if (rc)
2648                 goto bad;
2649
2650         rc = policydb_index(p);
2651         if (rc)
2652                 goto bad;
2653
2654         rc = -EINVAL;
2655         perm = string_to_av_perm(p, p->process_class, "transition");
2656         if (!perm) {
2657                 pr_err("SELinux: process transition permission is required, not defined in policy\n");
2658                 goto bad;
2659         }
2660         p->process_trans_perms = perm;
2661         perm = string_to_av_perm(p, p->process_class, "dyntransition");
2662         if (!perm) {
2663                 pr_err("SELinux: process dyntransition permission is required, not defined in policy\n");
2664                 goto bad;
2665         }
2666         p->process_trans_perms |= perm;
2667
2668         rc = ocontext_read(p, info, fp);
2669         if (rc)
2670                 goto bad;
2671
2672         rc = genfs_read(p, fp);
2673         if (rc)
2674                 goto bad;
2675
2676         rc = range_read(p, fp);
2677         if (rc)
2678                 goto bad;
2679
2680         rc = -ENOMEM;
2681         p->type_attr_map_array = kvcalloc(p->p_types.nprim,
2682                                           sizeof(*p->type_attr_map_array),
2683                                           GFP_KERNEL);
2684         if (!p->type_attr_map_array)
2685                 goto bad;
2686
2687         /* just in case ebitmap_init() becomes more than just a memset(0): */
2688         for (i = 0; i < p->p_types.nprim; i++)
2689                 ebitmap_init(&p->type_attr_map_array[i]);
2690
2691         for (i = 0; i < p->p_types.nprim; i++) {
2692                 struct ebitmap *e = &p->type_attr_map_array[i];
2693
2694                 if (p->policyvers >= POLICYDB_VERSION_AVTAB) {
2695                         rc = ebitmap_read(e, fp);
2696                         if (rc)
2697                                 goto bad;
2698                 }
2699                 /* add the type itself as the degenerate case */
2700                 rc = ebitmap_set_bit(e, i, 1);
2701                 if (rc)
2702                         goto bad;
2703         }
2704
2705         rc = policydb_bounds_sanity_check(p);
2706         if (rc)
2707                 goto bad;
2708
2709         rc = 0;
2710 out:
2711         return rc;
2712 bad:
2713         kfree(rtk);
2714         kfree(rtd);
2715         policydb_destroy(p);
2716         goto out;
2717 }
2718
2719 /*
2720  * Write a MLS level structure to a policydb binary
2721  * representation file.
2722  */
2723 static int mls_write_level(struct mls_level *l, void *fp)
2724 {
2725         __le32 buf[1];
2726         int rc;
2727
2728         buf[0] = cpu_to_le32(l->sens);
2729         rc = put_entry(buf, sizeof(u32), 1, fp);
2730         if (rc)
2731                 return rc;
2732
2733         rc = ebitmap_write(&l->cat, fp);
2734         if (rc)
2735                 return rc;
2736
2737         return 0;
2738 }
2739
2740 /*
2741  * Write a MLS range structure to a policydb binary
2742  * representation file.
2743  */
2744 static int mls_write_range_helper(struct mls_range *r, void *fp)
2745 {
2746         __le32 buf[3];
2747         size_t items;
2748         int rc, eq;
2749
2750         eq = mls_level_eq(&r->level[1], &r->level[0]);
2751
2752         if (eq)
2753                 items = 2;
2754         else
2755                 items = 3;
2756         buf[0] = cpu_to_le32(items-1);
2757         buf[1] = cpu_to_le32(r->level[0].sens);
2758         if (!eq)
2759                 buf[2] = cpu_to_le32(r->level[1].sens);
2760
2761         BUG_ON(items > ARRAY_SIZE(buf));
2762
2763         rc = put_entry(buf, sizeof(u32), items, fp);
2764         if (rc)
2765                 return rc;
2766
2767         rc = ebitmap_write(&r->level[0].cat, fp);
2768         if (rc)
2769                 return rc;
2770         if (!eq) {
2771                 rc = ebitmap_write(&r->level[1].cat, fp);
2772                 if (rc)
2773                         return rc;
2774         }
2775
2776         return 0;
2777 }
2778
2779 static int sens_write(void *vkey, void *datum, void *ptr)
2780 {
2781         char *key = vkey;
2782         struct level_datum *levdatum = datum;
2783         struct policy_data *pd = ptr;
2784         void *fp = pd->fp;
2785         __le32 buf[2];
2786         size_t len;
2787         int rc;
2788
2789         len = strlen(key);
2790         buf[0] = cpu_to_le32(len);
2791         buf[1] = cpu_to_le32(levdatum->isalias);
2792         rc = put_entry(buf, sizeof(u32), 2, fp);
2793         if (rc)
2794                 return rc;
2795
2796         rc = put_entry(key, 1, len, fp);
2797         if (rc)
2798                 return rc;
2799
2800         rc = mls_write_level(levdatum->level, fp);
2801         if (rc)
2802                 return rc;
2803
2804         return 0;
2805 }
2806
2807 static int cat_write(void *vkey, void *datum, void *ptr)
2808 {
2809         char *key = vkey;
2810         struct cat_datum *catdatum = datum;
2811         struct policy_data *pd = ptr;
2812         void *fp = pd->fp;
2813         __le32 buf[3];
2814         size_t len;
2815         int rc;
2816
2817         len = strlen(key);
2818         buf[0] = cpu_to_le32(len);
2819         buf[1] = cpu_to_le32(catdatum->value);
2820         buf[2] = cpu_to_le32(catdatum->isalias);
2821         rc = put_entry(buf, sizeof(u32), 3, fp);
2822         if (rc)
2823                 return rc;
2824
2825         rc = put_entry(key, 1, len, fp);
2826         if (rc)
2827                 return rc;
2828
2829         return 0;
2830 }
2831
2832 static int role_trans_write_one(void *key, void *datum, void *ptr)
2833 {
2834         struct role_trans_key *rtk = key;
2835         struct role_trans_datum *rtd = datum;
2836         struct policy_data *pd = ptr;
2837         void *fp = pd->fp;
2838         struct policydb *p = pd->p;
2839         __le32 buf[3];
2840         int rc;
2841
2842         buf[0] = cpu_to_le32(rtk->role);
2843         buf[1] = cpu_to_le32(rtk->type);
2844         buf[2] = cpu_to_le32(rtd->new_role);
2845         rc = put_entry(buf, sizeof(u32), 3, fp);
2846         if (rc)
2847                 return rc;
2848         if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) {
2849                 buf[0] = cpu_to_le32(rtk->tclass);
2850                 rc = put_entry(buf, sizeof(u32), 1, fp);
2851                 if (rc)
2852                         return rc;
2853         }
2854         return 0;
2855 }
2856
2857 static int role_trans_write(struct policydb *p, void *fp)
2858 {
2859         struct policy_data pd = { .p = p, .fp = fp };
2860         __le32 buf[1];
2861         int rc;
2862
2863         buf[0] = cpu_to_le32(p->role_tr.nel);
2864         rc = put_entry(buf, sizeof(u32), 1, fp);
2865         if (rc)
2866                 return rc;
2867
2868         return hashtab_map(&p->role_tr, role_trans_write_one, &pd);
2869 }
2870
2871 static int role_allow_write(struct role_allow *r, void *fp)
2872 {
2873         struct role_allow *ra;
2874         __le32 buf[2];
2875         size_t nel;
2876         int rc;
2877
2878         nel = 0;
2879         for (ra = r; ra; ra = ra->next)
2880                 nel++;
2881         buf[0] = cpu_to_le32(nel);
2882         rc = put_entry(buf, sizeof(u32), 1, fp);
2883         if (rc)
2884                 return rc;
2885         for (ra = r; ra; ra = ra->next) {
2886                 buf[0] = cpu_to_le32(ra->role);
2887                 buf[1] = cpu_to_le32(ra->new_role);
2888                 rc = put_entry(buf, sizeof(u32), 2, fp);
2889                 if (rc)
2890                         return rc;
2891         }
2892         return 0;
2893 }
2894
2895 /*
2896  * Write a security context structure
2897  * to a policydb binary representation file.
2898  */
2899 static int context_write(struct policydb *p, struct context *c,
2900                          void *fp)
2901 {
2902         int rc;
2903         __le32 buf[3];
2904
2905         buf[0] = cpu_to_le32(c->user);
2906         buf[1] = cpu_to_le32(c->role);
2907         buf[2] = cpu_to_le32(c->type);
2908
2909         rc = put_entry(buf, sizeof(u32), 3, fp);
2910         if (rc)
2911                 return rc;
2912
2913         rc = mls_write_range_helper(&c->range, fp);
2914         if (rc)
2915                 return rc;
2916
2917         return 0;
2918 }
2919
2920 /*
2921  * The following *_write functions are used to
2922  * write the symbol data to a policy database
2923  * binary representation file.
2924  */
2925
2926 static int perm_write(void *vkey, void *datum, void *fp)
2927 {
2928         char *key = vkey;
2929         struct perm_datum *perdatum = datum;
2930         __le32 buf[2];
2931         size_t len;
2932         int rc;
2933
2934         len = strlen(key);
2935         buf[0] = cpu_to_le32(len);
2936         buf[1] = cpu_to_le32(perdatum->value);
2937         rc = put_entry(buf, sizeof(u32), 2, fp);
2938         if (rc)
2939                 return rc;
2940
2941         rc = put_entry(key, 1, len, fp);
2942         if (rc)
2943                 return rc;
2944
2945         return 0;
2946 }
2947
2948 static int common_write(void *vkey, void *datum, void *ptr)
2949 {
2950         char *key = vkey;
2951         struct common_datum *comdatum = datum;
2952         struct policy_data *pd = ptr;
2953         void *fp = pd->fp;
2954         __le32 buf[4];
2955         size_t len;
2956         int rc;
2957
2958         len = strlen(key);
2959         buf[0] = cpu_to_le32(len);
2960         buf[1] = cpu_to_le32(comdatum->value);
2961         buf[2] = cpu_to_le32(comdatum->permissions.nprim);
2962         buf[3] = cpu_to_le32(comdatum->permissions.table.nel);
2963         rc = put_entry(buf, sizeof(u32), 4, fp);
2964         if (rc)
2965                 return rc;
2966
2967         rc = put_entry(key, 1, len, fp);
2968         if (rc)
2969                 return rc;
2970
2971         rc = hashtab_map(&comdatum->permissions.table, perm_write, fp);
2972         if (rc)
2973                 return rc;
2974
2975         return 0;
2976 }
2977
2978 static int type_set_write(struct type_set *t, void *fp)
2979 {
2980         int rc;
2981         __le32 buf[1];
2982
2983         if (ebitmap_write(&t->types, fp))
2984                 return -EINVAL;
2985         if (ebitmap_write(&t->negset, fp))
2986                 return -EINVAL;
2987
2988         buf[0] = cpu_to_le32(t->flags);
2989         rc = put_entry(buf, sizeof(u32), 1, fp);
2990         if (rc)
2991                 return -EINVAL;
2992
2993         return 0;
2994 }
2995
2996 static int write_cons_helper(struct policydb *p, struct constraint_node *node,
2997                              void *fp)
2998 {
2999         struct constraint_node *c;
3000         struct constraint_expr *e;
3001         __le32 buf[3];
3002         u32 nel;
3003         int rc;
3004
3005         for (c = node; c; c = c->next) {
3006                 nel = 0;
3007                 for (e = c->expr; e; e = e->next)
3008                         nel++;
3009                 buf[0] = cpu_to_le32(c->permissions);
3010                 buf[1] = cpu_to_le32(nel);
3011                 rc = put_entry(buf, sizeof(u32), 2, fp);
3012                 if (rc)
3013                         return rc;
3014                 for (e = c->expr; e; e = e->next) {
3015                         buf[0] = cpu_to_le32(e->expr_type);
3016                         buf[1] = cpu_to_le32(e->attr);
3017                         buf[2] = cpu_to_le32(e->op);
3018                         rc = put_entry(buf, sizeof(u32), 3, fp);
3019                         if (rc)
3020                                 return rc;
3021
3022                         switch (e->expr_type) {
3023                         case CEXPR_NAMES:
3024                                 rc = ebitmap_write(&e->names, fp);
3025                                 if (rc)
3026                                         return rc;
3027                                 if (p->policyvers >=
3028                                         POLICYDB_VERSION_CONSTRAINT_NAMES) {
3029                                         rc = type_set_write(e->type_names, fp);
3030                                         if (rc)
3031                                                 return rc;
3032                                 }
3033                                 break;
3034                         default:
3035                                 break;
3036                         }
3037                 }
3038         }
3039
3040         return 0;
3041 }
3042
3043 static int class_write(void *vkey, void *datum, void *ptr)
3044 {
3045         char *key = vkey;
3046         struct class_datum *cladatum = datum;
3047         struct policy_data *pd = ptr;
3048         void *fp = pd->fp;
3049         struct policydb *p = pd->p;
3050         struct constraint_node *c;
3051         __le32 buf[6];
3052         u32 ncons;
3053         size_t len, len2;
3054         int rc;
3055
3056         len = strlen(key);
3057         if (cladatum->comkey)
3058                 len2 = strlen(cladatum->comkey);
3059         else
3060                 len2 = 0;
3061
3062         ncons = 0;
3063         for (c = cladatum->constraints; c; c = c->next)
3064                 ncons++;
3065
3066         buf[0] = cpu_to_le32(len);
3067         buf[1] = cpu_to_le32(len2);
3068         buf[2] = cpu_to_le32(cladatum->value);
3069         buf[3] = cpu_to_le32(cladatum->permissions.nprim);
3070         buf[4] = cpu_to_le32(cladatum->permissions.table.nel);
3071         buf[5] = cpu_to_le32(ncons);
3072         rc = put_entry(buf, sizeof(u32), 6, fp);
3073         if (rc)
3074                 return rc;
3075
3076         rc = put_entry(key, 1, len, fp);
3077         if (rc)
3078                 return rc;
3079
3080         if (cladatum->comkey) {
3081                 rc = put_entry(cladatum->comkey, 1, len2, fp);
3082                 if (rc)
3083                         return rc;
3084         }
3085
3086         rc = hashtab_map(&cladatum->permissions.table, perm_write, fp);
3087         if (rc)
3088                 return rc;
3089
3090         rc = write_cons_helper(p, cladatum->constraints, fp);
3091         if (rc)
3092                 return rc;
3093
3094         /* write out the validatetrans rule */
3095         ncons = 0;
3096         for (c = cladatum->validatetrans; c; c = c->next)
3097                 ncons++;
3098
3099         buf[0] = cpu_to_le32(ncons);
3100         rc = put_entry(buf, sizeof(u32), 1, fp);
3101         if (rc)
3102                 return rc;
3103
3104         rc = write_cons_helper(p, cladatum->validatetrans, fp);
3105         if (rc)
3106                 return rc;
3107
3108         if (p->policyvers >= POLICYDB_VERSION_NEW_OBJECT_DEFAULTS) {
3109                 buf[0] = cpu_to_le32(cladatum->default_user);
3110                 buf[1] = cpu_to_le32(cladatum->default_role);
3111                 buf[2] = cpu_to_le32(cladatum->default_range);
3112
3113                 rc = put_entry(buf, sizeof(uint32_t), 3, fp);
3114                 if (rc)
3115                         return rc;
3116         }
3117
3118         if (p->policyvers >= POLICYDB_VERSION_DEFAULT_TYPE) {
3119                 buf[0] = cpu_to_le32(cladatum->default_type);
3120                 rc = put_entry(buf, sizeof(uint32_t), 1, fp);
3121                 if (rc)
3122                         return rc;
3123         }
3124
3125         return 0;
3126 }
3127
3128 static int role_write(void *vkey, void *datum, void *ptr)
3129 {
3130         char *key = vkey;
3131         struct role_datum *role = datum;
3132         struct policy_data *pd = ptr;
3133         void *fp = pd->fp;
3134         struct policydb *p = pd->p;
3135         __le32 buf[3];
3136         size_t items, len;
3137         int rc;
3138
3139         len = strlen(key);
3140         items = 0;
3141         buf[items++] = cpu_to_le32(len);
3142         buf[items++] = cpu_to_le32(role->value);
3143         if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
3144                 buf[items++] = cpu_to_le32(role->bounds);
3145
3146         BUG_ON(items > ARRAY_SIZE(buf));
3147
3148         rc = put_entry(buf, sizeof(u32), items, fp);
3149         if (rc)
3150                 return rc;
3151
3152         rc = put_entry(key, 1, len, fp);
3153         if (rc)
3154                 return rc;
3155
3156         rc = ebitmap_write(&role->dominates, fp);
3157         if (rc)
3158                 return rc;
3159
3160         rc = ebitmap_write(&role->types, fp);
3161         if (rc)
3162                 return rc;
3163
3164         return 0;
3165 }
3166
3167 static int type_write(void *vkey, void *datum, void *ptr)
3168 {
3169         char *key = vkey;
3170         struct type_datum *typdatum = datum;
3171         struct policy_data *pd = ptr;
3172         struct policydb *p = pd->p;
3173         void *fp = pd->fp;
3174         __le32 buf[4];
3175         int rc;
3176         size_t items, len;
3177
3178         len = strlen(key);
3179         items = 0;
3180         buf[items++] = cpu_to_le32(len);
3181         buf[items++] = cpu_to_le32(typdatum->value);
3182         if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) {
3183                 u32 properties = 0;
3184
3185                 if (typdatum->primary)
3186                         properties |= TYPEDATUM_PROPERTY_PRIMARY;
3187
3188                 if (typdatum->attribute)
3189                         properties |= TYPEDATUM_PROPERTY_ATTRIBUTE;
3190
3191                 buf[items++] = cpu_to_le32(properties);
3192                 buf[items++] = cpu_to_le32(typdatum->bounds);
3193         } else {
3194                 buf[items++] = cpu_to_le32(typdatum->primary);
3195         }
3196         BUG_ON(items > ARRAY_SIZE(buf));
3197         rc = put_entry(buf, sizeof(u32), items, fp);
3198         if (rc)
3199                 return rc;
3200
3201         rc = put_entry(key, 1, len, fp);
3202         if (rc)
3203                 return rc;
3204
3205         return 0;
3206 }
3207
3208 static int user_write(void *vkey, void *datum, void *ptr)
3209 {
3210         char *key = vkey;
3211         struct user_datum *usrdatum = datum;
3212         struct policy_data *pd = ptr;
3213         struct policydb *p = pd->p;
3214         void *fp = pd->fp;
3215         __le32 buf[3];
3216         size_t items, len;
3217         int rc;
3218
3219         len = strlen(key);
3220         items = 0;
3221         buf[items++] = cpu_to_le32(len);
3222         buf[items++] = cpu_to_le32(usrdatum->value);
3223         if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
3224                 buf[items++] = cpu_to_le32(usrdatum->bounds);
3225         BUG_ON(items > ARRAY_SIZE(buf));
3226         rc = put_entry(buf, sizeof(u32), items, fp);
3227         if (rc)
3228                 return rc;
3229
3230         rc = put_entry(key, 1, len, fp);
3231         if (rc)
3232                 return rc;
3233
3234         rc = ebitmap_write(&usrdatum->roles, fp);
3235         if (rc)
3236                 return rc;
3237
3238         rc = mls_write_range_helper(&usrdatum->range, fp);
3239         if (rc)
3240                 return rc;
3241
3242         rc = mls_write_level(&usrdatum->dfltlevel, fp);
3243         if (rc)
3244                 return rc;
3245
3246         return 0;
3247 }
3248
3249 static int (*write_f[SYM_NUM]) (void *key, void *datum,
3250                                 void *datap) =
3251 {
3252         common_write,
3253         class_write,
3254         role_write,
3255         type_write,
3256         user_write,
3257         cond_write_bool,
3258         sens_write,
3259         cat_write,
3260 };
3261
3262 static int ocontext_write(struct policydb *p, struct policydb_compat_info *info,
3263                           void *fp)
3264 {
3265         unsigned int i, j, rc;
3266         size_t nel, len;
3267         __be64 prefixbuf[1];
3268         __le32 buf[3];
3269         u32 nodebuf[8];
3270         struct ocontext *c;
3271         for (i = 0; i < info->ocon_num; i++) {
3272                 nel = 0;
3273                 for (c = p->ocontexts[i]; c; c = c->next)
3274                         nel++;
3275                 buf[0] = cpu_to_le32(nel);
3276                 rc = put_entry(buf, sizeof(u32), 1, fp);
3277                 if (rc)
3278                         return rc;
3279                 for (c = p->ocontexts[i]; c; c = c->next) {
3280                         switch (i) {
3281                         case OCON_ISID:
3282                                 buf[0] = cpu_to_le32(c->sid[0]);
3283                                 rc = put_entry(buf, sizeof(u32), 1, fp);
3284                                 if (rc)
3285                                         return rc;
3286                                 rc = context_write(p, &c->context[0], fp);
3287                                 if (rc)
3288                                         return rc;
3289                                 break;
3290                         case OCON_FS:
3291                         case OCON_NETIF:
3292                                 len = strlen(c->u.name);
3293                                 buf[0] = cpu_to_le32(len);
3294                                 rc = put_entry(buf, sizeof(u32), 1, fp);
3295                                 if (rc)
3296                                         return rc;
3297                                 rc = put_entry(c->u.name, 1, len, fp);
3298                                 if (rc)
3299                                         return rc;
3300                                 rc = context_write(p, &c->context[0], fp);
3301                                 if (rc)
3302                                         return rc;
3303                                 rc = context_write(p, &c->context[1], fp);
3304                                 if (rc)
3305                                         return rc;
3306                                 break;
3307                         case OCON_PORT:
3308                                 buf[0] = cpu_to_le32(c->u.port.protocol);
3309                                 buf[1] = cpu_to_le32(c->u.port.low_port);
3310                                 buf[2] = cpu_to_le32(c->u.port.high_port);
3311                                 rc = put_entry(buf, sizeof(u32), 3, fp);
3312                                 if (rc)
3313                                         return rc;
3314                                 rc = context_write(p, &c->context[0], fp);
3315                                 if (rc)
3316                                         return rc;
3317                                 break;
3318                         case OCON_NODE:
3319                                 nodebuf[0] = c->u.node.addr; /* network order */
3320                                 nodebuf[1] = c->u.node.mask; /* network order */
3321                                 rc = put_entry(nodebuf, sizeof(u32), 2, fp);
3322                                 if (rc)
3323                                         return rc;
3324                                 rc = context_write(p, &c->context[0], fp);
3325                                 if (rc)
3326                                         return rc;
3327                                 break;
3328                         case OCON_FSUSE:
3329                                 buf[0] = cpu_to_le32(c->v.behavior);
3330                                 len = strlen(c->u.name);
3331                                 buf[1] = cpu_to_le32(len);
3332                                 rc = put_entry(buf, sizeof(u32), 2, fp);
3333                                 if (rc)
3334                                         return rc;
3335                                 rc = put_entry(c->u.name, 1, len, fp);
3336                                 if (rc)
3337                                         return rc;
3338                                 rc = context_write(p, &c->context[0], fp);
3339                                 if (rc)
3340                                         return rc;
3341                                 break;
3342                         case OCON_NODE6:
3343                                 for (j = 0; j < 4; j++)
3344                                         nodebuf[j] = c->u.node6.addr[j]; /* network order */
3345                                 for (j = 0; j < 4; j++)
3346                                         nodebuf[j + 4] = c->u.node6.mask[j]; /* network order */
3347                                 rc = put_entry(nodebuf, sizeof(u32), 8, fp);
3348                                 if (rc)
3349                                         return rc;
3350                                 rc = context_write(p, &c->context[0], fp);
3351                                 if (rc)
3352                                         return rc;
3353                                 break;
3354                         case OCON_IBPKEY:
3355                                 /* subnet_prefix is in CPU order */
3356                                 prefixbuf[0] = cpu_to_be64(c->u.ibpkey.subnet_prefix);
3357
3358                                 rc = put_entry(prefixbuf, sizeof(u64), 1, fp);
3359                                 if (rc)
3360                                         return rc;
3361
3362                                 buf[0] = cpu_to_le32(c->u.ibpkey.low_pkey);
3363                                 buf[1] = cpu_to_le32(c->u.ibpkey.high_pkey);
3364
3365                                 rc = put_entry(buf, sizeof(u32), 2, fp);
3366                                 if (rc)
3367                                         return rc;
3368                                 rc = context_write(p, &c->context[0], fp);
3369                                 if (rc)
3370                                         return rc;
3371                                 break;
3372                         case OCON_IBENDPORT:
3373                                 len = strlen(c->u.ibendport.dev_name);
3374                                 buf[0] = cpu_to_le32(len);
3375                                 buf[1] = cpu_to_le32(c->u.ibendport.port);
3376                                 rc = put_entry(buf, sizeof(u32), 2, fp);
3377                                 if (rc)
3378                                         return rc;
3379                                 rc = put_entry(c->u.ibendport.dev_name, 1, len, fp);
3380                                 if (rc)
3381                                         return rc;
3382                                 rc = context_write(p, &c->context[0], fp);
3383                                 if (rc)
3384                                         return rc;
3385                                 break;
3386                         }
3387                 }
3388         }
3389         return 0;
3390 }
3391
3392 static int genfs_write(struct policydb *p, void *fp)
3393 {
3394         struct genfs *genfs;
3395         struct ocontext *c;
3396         size_t len;
3397         __le32 buf[1];
3398         int rc;
3399
3400         len = 0;
3401         for (genfs = p->genfs; genfs; genfs = genfs->next)
3402                 len++;
3403         buf[0] = cpu_to_le32(len);
3404         rc = put_entry(buf, sizeof(u32), 1, fp);
3405         if (rc)
3406                 return rc;
3407         for (genfs = p->genfs; genfs; genfs = genfs->next) {
3408                 len = strlen(genfs->fstype);
3409                 buf[0] = cpu_to_le32(len);
3410                 rc = put_entry(buf, sizeof(u32), 1, fp);
3411                 if (rc)
3412                         return rc;
3413                 rc = put_entry(genfs->fstype, 1, len, fp);
3414                 if (rc)
3415                         return rc;
3416                 len = 0;
3417                 for (c = genfs->head; c; c = c->next)
3418                         len++;
3419                 buf[0] = cpu_to_le32(len);
3420                 rc = put_entry(buf, sizeof(u32), 1, fp);
3421                 if (rc)
3422                         return rc;
3423                 for (c = genfs->head; c; c = c->next) {
3424                         len = strlen(c->u.name);
3425                         buf[0] = cpu_to_le32(len);
3426                         rc = put_entry(buf, sizeof(u32), 1, fp);
3427                         if (rc)
3428                                 return rc;
3429                         rc = put_entry(c->u.name, 1, len, fp);
3430                         if (rc)
3431                                 return rc;
3432                         buf[0] = cpu_to_le32(c->v.sclass);
3433                         rc = put_entry(buf, sizeof(u32), 1, fp);
3434                         if (rc)
3435                                 return rc;
3436                         rc = context_write(p, &c->context[0], fp);
3437                         if (rc)
3438                                 return rc;
3439                 }
3440         }
3441         return 0;
3442 }
3443
3444 static int range_write_helper(void *key, void *data, void *ptr)
3445 {
3446         __le32 buf[2];
3447         struct range_trans *rt = key;
3448         struct mls_range *r = data;
3449         struct policy_data *pd = ptr;
3450         void *fp = pd->fp;
3451         struct policydb *p = pd->p;
3452         int rc;
3453
3454         buf[0] = cpu_to_le32(rt->source_type);
3455         buf[1] = cpu_to_le32(rt->target_type);
3456         rc = put_entry(buf, sizeof(u32), 2, fp);
3457         if (rc)
3458                 return rc;
3459         if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) {
3460                 buf[0] = cpu_to_le32(rt->target_class);
3461                 rc = put_entry(buf, sizeof(u32), 1, fp);
3462                 if (rc)
3463                         return rc;
3464         }
3465         rc = mls_write_range_helper(r, fp);
3466         if (rc)
3467                 return rc;
3468
3469         return 0;
3470 }
3471
3472 static int range_write(struct policydb *p, void *fp)
3473 {
3474         __le32 buf[1];
3475         int rc;
3476         struct policy_data pd;
3477
3478         pd.p = p;
3479         pd.fp = fp;
3480
3481         buf[0] = cpu_to_le32(p->range_tr.nel);
3482         rc = put_entry(buf, sizeof(u32), 1, fp);
3483         if (rc)
3484                 return rc;
3485
3486         /* actually write all of the entries */
3487         rc = hashtab_map(&p->range_tr, range_write_helper, &pd);
3488         if (rc)
3489                 return rc;
3490
3491         return 0;
3492 }
3493
3494 static int filename_write_helper_compat(void *key, void *data, void *ptr)
3495 {
3496         struct filename_trans_key *ft = key;
3497         struct filename_trans_datum *datum = data;
3498         struct ebitmap_node *node;
3499         void *fp = ptr;
3500         __le32 buf[4];
3501         int rc;
3502         u32 bit, len = strlen(ft->name);
3503
3504         do {
3505                 ebitmap_for_each_positive_bit(&datum->stypes, node, bit) {
3506                         buf[0] = cpu_to_le32(len);
3507                         rc = put_entry(buf, sizeof(u32), 1, fp);
3508                         if (rc)
3509                                 return rc;
3510
3511                         rc = put_entry(ft->name, sizeof(char), len, fp);
3512                         if (rc)
3513                                 return rc;
3514
3515                         buf[0] = cpu_to_le32(bit + 1);
3516                         buf[1] = cpu_to_le32(ft->ttype);
3517                         buf[2] = cpu_to_le32(ft->tclass);
3518                         buf[3] = cpu_to_le32(datum->otype);
3519
3520                         rc = put_entry(buf, sizeof(u32), 4, fp);
3521                         if (rc)
3522                                 return rc;
3523                 }
3524
3525                 datum = datum->next;
3526         } while (unlikely(datum));
3527
3528         return 0;
3529 }
3530
3531 static int filename_write_helper(void *key, void *data, void *ptr)
3532 {
3533         struct filename_trans_key *ft = key;
3534         struct filename_trans_datum *datum;
3535         void *fp = ptr;
3536         __le32 buf[3];
3537         int rc;
3538         u32 ndatum, len = strlen(ft->name);
3539
3540         buf[0] = cpu_to_le32(len);
3541         rc = put_entry(buf, sizeof(u32), 1, fp);
3542         if (rc)
3543                 return rc;
3544
3545         rc = put_entry(ft->name, sizeof(char), len, fp);
3546         if (rc)
3547                 return rc;
3548
3549         ndatum = 0;
3550         datum = data;
3551         do {
3552                 ndatum++;
3553                 datum = datum->next;
3554         } while (unlikely(datum));
3555
3556         buf[0] = cpu_to_le32(ft->ttype);
3557         buf[1] = cpu_to_le32(ft->tclass);
3558         buf[2] = cpu_to_le32(ndatum);
3559         rc = put_entry(buf, sizeof(u32), 3, fp);
3560         if (rc)
3561                 return rc;
3562
3563         datum = data;
3564         do {
3565                 rc = ebitmap_write(&datum->stypes, fp);
3566                 if (rc)
3567                         return rc;
3568
3569                 buf[0] = cpu_to_le32(datum->otype);
3570                 rc = put_entry(buf, sizeof(u32), 1, fp);
3571                 if (rc)
3572                         return rc;
3573
3574                 datum = datum->next;
3575         } while (unlikely(datum));
3576
3577         return 0;
3578 }
3579
3580 static int filename_trans_write(struct policydb *p, void *fp)
3581 {
3582         __le32 buf[1];
3583         int rc;
3584
3585         if (p->policyvers < POLICYDB_VERSION_FILENAME_TRANS)
3586                 return 0;
3587
3588         if (p->policyvers < POLICYDB_VERSION_COMP_FTRANS) {
3589                 buf[0] = cpu_to_le32(p->compat_filename_trans_count);
3590                 rc = put_entry(buf, sizeof(u32), 1, fp);
3591                 if (rc)
3592                         return rc;
3593
3594                 rc = hashtab_map(&p->filename_trans,
3595                                  filename_write_helper_compat, fp);
3596         } else {
3597                 buf[0] = cpu_to_le32(p->filename_trans.nel);
3598                 rc = put_entry(buf, sizeof(u32), 1, fp);
3599                 if (rc)
3600                         return rc;
3601
3602                 rc = hashtab_map(&p->filename_trans, filename_write_helper, fp);
3603         }
3604         return rc;
3605 }
3606
3607 /*
3608  * Write the configuration data in a policy database
3609  * structure to a policy database binary representation
3610  * file.
3611  */
3612 int policydb_write(struct policydb *p, void *fp)
3613 {
3614         unsigned int i, num_syms;
3615         int rc;
3616         __le32 buf[4];
3617         u32 config;
3618         size_t len;
3619         struct policydb_compat_info *info;
3620
3621         /*
3622          * refuse to write policy older than compressed avtab
3623          * to simplify the writer.  There are other tests dropped
3624          * since we assume this throughout the writer code.  Be
3625          * careful if you ever try to remove this restriction
3626          */
3627         if (p->policyvers < POLICYDB_VERSION_AVTAB) {
3628                 pr_err("SELinux: refusing to write policy version %d."
3629                        "  Because it is less than version %d\n", p->policyvers,
3630                        POLICYDB_VERSION_AVTAB);
3631                 return -EINVAL;
3632         }
3633
3634         config = 0;
3635         if (p->mls_enabled)
3636                 config |= POLICYDB_CONFIG_MLS;
3637
3638         if (p->reject_unknown)
3639                 config |= REJECT_UNKNOWN;
3640         if (p->allow_unknown)
3641                 config |= ALLOW_UNKNOWN;
3642
3643         /* Write the magic number and string identifiers. */
3644         buf[0] = cpu_to_le32(POLICYDB_MAGIC);
3645         len = strlen(POLICYDB_STRING);
3646         buf[1] = cpu_to_le32(len);
3647         rc = put_entry(buf, sizeof(u32), 2, fp);
3648         if (rc)
3649                 return rc;
3650         rc = put_entry(POLICYDB_STRING, 1, len, fp);
3651         if (rc)
3652                 return rc;
3653
3654         /* Write the version, config, and table sizes. */
3655         info = policydb_lookup_compat(p->policyvers);
3656         if (!info) {
3657                 pr_err("SELinux: compatibility lookup failed for policy "
3658                     "version %d", p->policyvers);
3659                 return -EINVAL;
3660         }
3661
3662         buf[0] = cpu_to_le32(p->policyvers);
3663         buf[1] = cpu_to_le32(config);
3664         buf[2] = cpu_to_le32(info->sym_num);
3665         buf[3] = cpu_to_le32(info->ocon_num);
3666
3667         rc = put_entry(buf, sizeof(u32), 4, fp);
3668         if (rc)
3669                 return rc;
3670
3671         if (p->policyvers >= POLICYDB_VERSION_POLCAP) {
3672                 rc = ebitmap_write(&p->policycaps, fp);
3673                 if (rc)
3674                         return rc;
3675         }
3676
3677         if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE) {
3678                 rc = ebitmap_write(&p->permissive_map, fp);
3679                 if (rc)
3680                         return rc;
3681         }
3682
3683         num_syms = info->sym_num;
3684         for (i = 0; i < num_syms; i++) {
3685                 struct policy_data pd;
3686
3687                 pd.fp = fp;
3688                 pd.p = p;
3689
3690                 buf[0] = cpu_to_le32(p->symtab[i].nprim);
3691                 buf[1] = cpu_to_le32(p->symtab[i].table.nel);
3692
3693                 rc = put_entry(buf, sizeof(u32), 2, fp);
3694                 if (rc)
3695                         return rc;
3696                 rc = hashtab_map(&p->symtab[i].table, write_f[i], &pd);
3697                 if (rc)
3698                         return rc;
3699         }
3700
3701         rc = avtab_write(p, &p->te_avtab, fp);
3702         if (rc)
3703                 return rc;
3704
3705         rc = cond_write_list(p, fp);
3706         if (rc)
3707                 return rc;
3708
3709         rc = role_trans_write(p, fp);
3710         if (rc)
3711                 return rc;
3712
3713         rc = role_allow_write(p->role_allow, fp);
3714         if (rc)
3715                 return rc;
3716
3717         rc = filename_trans_write(p, fp);
3718         if (rc)
3719                 return rc;
3720
3721         rc = ocontext_write(p, info, fp);
3722         if (rc)
3723                 return rc;
3724
3725         rc = genfs_write(p, fp);
3726         if (rc)
3727                 return rc;
3728
3729         rc = range_write(p, fp);
3730         if (rc)
3731                 return rc;
3732
3733         for (i = 0; i < p->p_types.nprim; i++) {
3734                 struct ebitmap *e = &p->type_attr_map_array[i];
3735
3736                 rc = ebitmap_write(e, fp);
3737                 if (rc)
3738                         return rc;
3739         }
3740
3741         return 0;
3742 }