git.oblomov.eu Git - linux-2.6/blob - security/selinux/ss/policydb.c

   1 /*
   2  * Implementation of the policy database.
   3  *
   4  * Author : Stephen Smalley, <sds@epoch.ncsc.mil>
   5  */
   6
   7 /*
   8  * Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com>
   9  *
  10  *      Support for enhanced MLS infrastructure.
  11  *
  12  * Updated: Frank Mayer <mayerf@tresys.com> and Karl MacMillan <kmacmillan@tresys.com>
  13  *
  14  *      Added conditional policy language extensions
  15  *
  16  * Copyright (C) 2004-2005 Trusted Computer Solutions, Inc.
  17  * Copyright (C) 2003 - 2004 Tresys Technology, LLC
  18  *      This program is free software; you can redistribute it and/or modify
  19  *      it under the terms of the GNU General Public License as published by
  20  *      the Free Software Foundation, version 2.
  21  */
  22
  23 #include <linux/kernel.h>
  24 #include <linux/slab.h>
  25 #include <linux/string.h>
  26 #include <linux/errno.h>
  27 #include "security.h"
  28
  29 #include "policydb.h"
  30 #include "conditional.h"
  31 #include "mls.h"
  32
  33 #define _DEBUG_HASHES
  34
  35 #ifdef DEBUG_HASHES
  36 static char *symtab_name[SYM_NUM] = {
  37         "common prefixes",
  38         "classes",
  39         "roles",
  40         "types",
  41         "users",
  42         "bools",
  43         "levels",
  44         "categories",
  45 };
  46 #endif
  47
  48 int selinux_mls_enabled = 0;
  49
  50 static unsigned int symtab_sizes[SYM_NUM] = {
  51         2,
  52         32,
  53         16,
  54         512,
  55         128,
  56         16,
  57         16,
  58         16,
  59 };
  60
  61 struct policydb_compat_info {
  62         int version;
  63         int sym_num;
  64         int ocon_num;
  65 };
  66
  67 /* These need to be updated if SYM_NUM or OCON_NUM changes */
  68 static struct policydb_compat_info policydb_compat[] = {
  69         {
  70                 .version        = POLICYDB_VERSION_BASE,
  71                 .sym_num        = SYM_NUM - 3,
  72                 .ocon_num       = OCON_NUM - 1,
  73         },
  74         {
  75                 .version        = POLICYDB_VERSION_BOOL,
  76                 .sym_num        = SYM_NUM - 2,
  77                 .ocon_num       = OCON_NUM - 1,
  78         },
  79         {
  80                 .version        = POLICYDB_VERSION_IPV6,
  81                 .sym_num        = SYM_NUM - 2,
  82                 .ocon_num       = OCON_NUM,
  83         },
  84         {
  85                 .version        = POLICYDB_VERSION_NLCLASS,
  86                 .sym_num        = SYM_NUM - 2,
  87                 .ocon_num       = OCON_NUM,
  88         },
  89         {
  90                 .version        = POLICYDB_VERSION_MLS,
  91                 .sym_num        = SYM_NUM,
  92                 .ocon_num       = OCON_NUM,
  93         },
  94         {
  95                 .version        = POLICYDB_VERSION_AVTAB,
  96                 .sym_num        = SYM_NUM,
  97                 .ocon_num       = OCON_NUM,
  98         },
  99 };
 100
 101 static struct policydb_compat_info *policydb_lookup_compat(int version)
 102 {
 103         int i;
 104         struct policydb_compat_info *info = NULL;
 105
 106         for (i = 0; i < sizeof(policydb_compat)/sizeof(*info); i++) {
 107                 if (policydb_compat[i].version == version) {
 108                         info = &policydb_compat[i];
 109                         break;
 110                 }
 111         }
 112         return info;
 113 }
 114
 115 /*
 116  * Initialize the role table.
 117  */
 118 static int roles_init(struct policydb *p)
 119 {
 120         char *key = NULL;
 121         int rc;
 122         struct role_datum *role;
 123
 124         role = kmalloc(sizeof(*role), GFP_KERNEL);
 125         if (!role) {
 126                 rc = -ENOMEM;
 127                 goto out;
 128         }
 129         memset(role, 0, sizeof(*role));
 130         role->value = ++p->p_roles.nprim;
 131         if (role->value != OBJECT_R_VAL) {
 132                 rc = -EINVAL;
 133                 goto out_free_role;
 134         }
 135         key = kmalloc(strlen(OBJECT_R)+1,GFP_KERNEL);
 136         if (!key) {
 137                 rc = -ENOMEM;
 138                 goto out_free_role;
 139         }
 140         strcpy(key, OBJECT_R);
 141         rc = hashtab_insert(p->p_roles.table, key, role);
 142         if (rc)
 143                 goto out_free_key;
 144 out:
 145         return rc;
 146
 147 out_free_key:
 148         kfree(key);
 149 out_free_role:
 150         kfree(role);
 151         goto out;
 152 }
 153
 154 /*
 155  * Initialize a policy database structure.
 156  */
 157 static int policydb_init(struct policydb *p)
 158 {
 159         int i, rc;
 160
 161         memset(p, 0, sizeof(*p));
 162
 163         for (i = 0; i < SYM_NUM; i++) {
 164                 rc = symtab_init(&p->symtab[i], symtab_sizes[i]);
 165                 if (rc)
 166                         goto out_free_symtab;
 167         }
 168
 169         rc = avtab_init(&p->te_avtab);
 170         if (rc)
 171                 goto out_free_symtab;
 172
 173         rc = roles_init(p);
 174         if (rc)
 175                 goto out_free_avtab;
 176
 177         rc = cond_policydb_init(p);
 178         if (rc)
 179                 goto out_free_avtab;
 180
 181 out:
 182         return rc;
 183
 184 out_free_avtab:
 185         avtab_destroy(&p->te_avtab);
 186
 187 out_free_symtab:
 188         for (i = 0; i < SYM_NUM; i++)
 189                 hashtab_destroy(p->symtab[i].table);
 190         goto out;
 191 }
 192
 193 /*
 194  * The following *_index functions are used to
 195  * define the val_to_name and val_to_struct arrays
 196  * in a policy database structure.  The val_to_name
 197  * arrays are used when converting security context
 198  * structures into string representations.  The
 199  * val_to_struct arrays are used when the attributes
 200  * of a class, role, or user are needed.
 201  */
 202
 203 static int common_index(void *key, void *datum, void *datap)
 204 {
 205         struct policydb *p;
 206         struct common_datum *comdatum;
 207
 208         comdatum = datum;
 209         p = datap;
 210         if (!comdatum->value || comdatum->value > p->p_commons.nprim)
 211                 return -EINVAL;
 212         p->p_common_val_to_name[comdatum->value - 1] = key;
 213         return 0;
 214 }
 215
 216 static int class_index(void *key, void *datum, void *datap)
 217 {
 218         struct policydb *p;
 219         struct class_datum *cladatum;
 220
 221         cladatum = datum;
 222         p = datap;
 223         if (!cladatum->value || cladatum->value > p->p_classes.nprim)
 224                 return -EINVAL;
 225         p->p_class_val_to_name[cladatum->value - 1] = key;
 226         p->class_val_to_struct[cladatum->value - 1] = cladatum;
 227         return 0;
 228 }
 229
 230 static int role_index(void *key, void *datum, void *datap)
 231 {
 232         struct policydb *p;
 233         struct role_datum *role;
 234
 235         role = datum;
 236         p = datap;
 237         if (!role->value || role->value > p->p_roles.nprim)
 238                 return -EINVAL;
 239         p->p_role_val_to_name[role->value - 1] = key;
 240         p->role_val_to_struct[role->value - 1] = role;
 241         return 0;
 242 }
 243
 244 static int type_index(void *key, void *datum, void *datap)
 245 {
 246         struct policydb *p;
 247         struct type_datum *typdatum;
 248
 249         typdatum = datum;
 250         p = datap;
 251
 252         if (typdatum->primary) {
 253                 if (!typdatum->value || typdatum->value > p->p_types.nprim)
 254                         return -EINVAL;
 255                 p->p_type_val_to_name[typdatum->value - 1] = key;
 256         }
 257
 258         return 0;
 259 }
 260
 261 static int user_index(void *key, void *datum, void *datap)
 262 {
 263         struct policydb *p;
 264         struct user_datum *usrdatum;
 265
 266         usrdatum = datum;
 267         p = datap;
 268         if (!usrdatum->value || usrdatum->value > p->p_users.nprim)
 269                 return -EINVAL;
 270         p->p_user_val_to_name[usrdatum->value - 1] = key;
 271         p->user_val_to_struct[usrdatum->value - 1] = usrdatum;
 272         return 0;
 273 }
 274
 275 static int sens_index(void *key, void *datum, void *datap)
 276 {
 277         struct policydb *p;
 278         struct level_datum *levdatum;
 279
 280         levdatum = datum;
 281         p = datap;
 282
 283         if (!levdatum->isalias) {
 284                 if (!levdatum->level->sens ||
 285                     levdatum->level->sens > p->p_levels.nprim)
 286                         return -EINVAL;
 287                 p->p_sens_val_to_name[levdatum->level->sens - 1] = key;
 288         }
 289
 290         return 0;
 291 }
 292
 293 static int cat_index(void *key, void *datum, void *datap)
 294 {
 295         struct policydb *p;
 296         struct cat_datum *catdatum;
 297
 298         catdatum = datum;
 299         p = datap;
 300
 301         if (!catdatum->isalias) {
 302                 if (!catdatum->value || catdatum->value > p->p_cats.nprim)
 303                         return -EINVAL;
 304                 p->p_cat_val_to_name[catdatum->value - 1] = key;
 305         }
 306
 307         return 0;
 308 }
 309
 310 static int (*index_f[SYM_NUM]) (void *key, void *datum, void *datap) =
 311 {
 312         common_index,
 313         class_index,
 314         role_index,
 315         type_index,
 316         user_index,
 317         cond_index_bool,
 318         sens_index,
 319         cat_index,
 320 };
 321
 322 /*
 323  * Define the common val_to_name array and the class
 324  * val_to_name and val_to_struct arrays in a policy
 325  * database structure.
 326  *
 327  * Caller must clean up upon failure.
 328  */
 329 static int policydb_index_classes(struct policydb *p)
 330 {
 331         int rc;
 332
 333         p->p_common_val_to_name =
 334                 kmalloc(p->p_commons.nprim * sizeof(char *), GFP_KERNEL);
 335         if (!p->p_common_val_to_name) {
 336                 rc = -ENOMEM;
 337                 goto out;
 338         }
 339
 340         rc = hashtab_map(p->p_commons.table, common_index, p);
 341         if (rc)
 342                 goto out;
 343
 344         p->class_val_to_struct =
 345                 kmalloc(p->p_classes.nprim * sizeof(*(p->class_val_to_struct)), GFP_KERNEL);
 346         if (!p->class_val_to_struct) {
 347                 rc = -ENOMEM;
 348                 goto out;
 349         }
 350
 351         p->p_class_val_to_name =
 352                 kmalloc(p->p_classes.nprim * sizeof(char *), GFP_KERNEL);
 353         if (!p->p_class_val_to_name) {
 354                 rc = -ENOMEM;
 355                 goto out;
 356         }
 357
 358         rc = hashtab_map(p->p_classes.table, class_index, p);
 359 out:
 360         return rc;
 361 }
 362
 363 #ifdef DEBUG_HASHES
 364 static void symtab_hash_eval(struct symtab *s)
 365 {
 366         int i;
 367
 368         for (i = 0; i < SYM_NUM; i++) {
 369                 struct hashtab *h = s[i].table;
 370                 struct hashtab_info info;
 371
 372                 hashtab_stat(h, &info);
 373                 printk(KERN_INFO "%s:  %d entries and %d/%d buckets used, "
 374                        "longest chain length %d\n", symtab_name[i], h->nel,
 375                        info.slots_used, h->size, info.max_chain_len);
 376         }
 377 }
 378 #endif
 379
 380 /*
 381  * Define the other val_to_name and val_to_struct arrays
 382  * in a policy database structure.
 383  *
 384  * Caller must clean up on failure.
 385  */
 386 static int policydb_index_others(struct policydb *p)
 387 {
 388         int i, rc = 0;
 389
 390         printk(KERN_INFO "security:  %d users, %d roles, %d types, %d bools",
 391                p->p_users.nprim, p->p_roles.nprim, p->p_types.nprim, p->p_bools.nprim);
 392         if (selinux_mls_enabled)
 393                 printk(", %d sens, %d cats", p->p_levels.nprim,
 394                        p->p_cats.nprim);
 395         printk("\n");
 396
 397         printk(KERN_INFO "security:  %d classes, %d rules\n",
 398                p->p_classes.nprim, p->te_avtab.nel);
 399
 400 #ifdef DEBUG_HASHES
 401         avtab_hash_eval(&p->te_avtab, "rules");
 402         symtab_hash_eval(p->symtab);
 403 #endif
 404
 405         p->role_val_to_struct =
 406                 kmalloc(p->p_roles.nprim * sizeof(*(p->role_val_to_struct)),
 407                         GFP_KERNEL);
 408         if (!p->role_val_to_struct) {
 409                 rc = -ENOMEM;
 410                 goto out;
 411         }
 412
 413         p->user_val_to_struct =
 414                 kmalloc(p->p_users.nprim * sizeof(*(p->user_val_to_struct)),
 415                         GFP_KERNEL);
 416         if (!p->user_val_to_struct) {
 417                 rc = -ENOMEM;
 418                 goto out;
 419         }
 420
 421         if (cond_init_bool_indexes(p)) {
 422                 rc = -ENOMEM;
 423                 goto out;
 424         }
 425
 426         for (i = SYM_ROLES; i < SYM_NUM; i++) {
 427                 p->sym_val_to_name[i] =
 428                         kmalloc(p->symtab[i].nprim * sizeof(char *), GFP_KERNEL);
 429                 if (!p->sym_val_to_name[i]) {
 430                         rc = -ENOMEM;
 431                         goto out;
 432                 }
 433                 rc = hashtab_map(p->symtab[i].table, index_f[i], p);
 434                 if (rc)
 435                         goto out;
 436         }
 437
 438 out:
 439         return rc;
 440 }
 441
 442 /*
 443  * The following *_destroy functions are used to
 444  * free any memory allocated for each kind of
 445  * symbol data in the policy database.
 446  */
 447
 448 static int perm_destroy(void *key, void *datum, void *p)
 449 {
 450         kfree(key);
 451         kfree(datum);
 452         return 0;
 453 }
 454
 455 static int common_destroy(void *key, void *datum, void *p)
 456 {
 457         struct common_datum *comdatum;
 458
 459         kfree(key);
 460         comdatum = datum;
 461         hashtab_map(comdatum->permissions.table, perm_destroy, NULL);
 462         hashtab_destroy(comdatum->permissions.table);
 463         kfree(datum);
 464         return 0;
 465 }
 466
 467 static int class_destroy(void *key, void *datum, void *p)
 468 {
 469         struct class_datum *cladatum;
 470         struct constraint_node *constraint, *ctemp;
 471         struct constraint_expr *e, *etmp;
 472
 473         kfree(key);
 474         cladatum = datum;
 475         hashtab_map(cladatum->permissions.table, perm_destroy, NULL);
 476         hashtab_destroy(cladatum->permissions.table);
 477         constraint = cladatum->constraints;
 478         while (constraint) {
 479                 e = constraint->expr;
 480                 while (e) {
 481                         ebitmap_destroy(&e->names);
 482                         etmp = e;
 483                         e = e->next;
 484                         kfree(etmp);
 485                 }
 486                 ctemp = constraint;
 487                 constraint = constraint->next;
 488                 kfree(ctemp);
 489         }
 490
 491         constraint = cladatum->validatetrans;
 492         while (constraint) {
 493                 e = constraint->expr;
 494                 while (e) {
 495                         ebitmap_destroy(&e->names);
 496                         etmp = e;
 497                         e = e->next;
 498                         kfree(etmp);
 499                 }
 500                 ctemp = constraint;
 501                 constraint = constraint->next;
 502                 kfree(ctemp);
 503         }
 504
 505         kfree(cladatum->comkey);
 506         kfree(datum);
 507         return 0;
 508 }
 509
 510 static int role_destroy(void *key, void *datum, void *p)
 511 {
 512         struct role_datum *role;
 513
 514         kfree(key);
 515         role = datum;
 516         ebitmap_destroy(&role->dominates);
 517         ebitmap_destroy(&role->types);
 518         kfree(datum);
 519         return 0;
 520 }
 521
 522 static int type_destroy(void *key, void *datum, void *p)
 523 {
 524         kfree(key);
 525         kfree(datum);
 526         return 0;
 527 }
 528
 529 static int user_destroy(void *key, void *datum, void *p)
 530 {
 531         struct user_datum *usrdatum;
 532
 533         kfree(key);
 534         usrdatum = datum;
 535         ebitmap_destroy(&usrdatum->roles);
 536         ebitmap_destroy(&usrdatum->range.level[0].cat);
 537         ebitmap_destroy(&usrdatum->range.level[1].cat);
 538         ebitmap_destroy(&usrdatum->dfltlevel.cat);
 539         kfree(datum);
 540         return 0;
 541 }
 542
 543 static int sens_destroy(void *key, void *datum, void *p)
 544 {
 545         struct level_datum *levdatum;
 546
 547         kfree(key);
 548         levdatum = datum;
 549         ebitmap_destroy(&levdatum->level->cat);
 550         kfree(levdatum->level);
 551         kfree(datum);
 552         return 0;
 553 }
 554
 555 static int cat_destroy(void *key, void *datum, void *p)
 556 {
 557         kfree(key);
 558         kfree(datum);
 559         return 0;
 560 }
 561
 562 static int (*destroy_f[SYM_NUM]) (void *key, void *datum, void *datap) =
 563 {
 564         common_destroy,
 565         class_destroy,
 566         role_destroy,
 567         type_destroy,
 568         user_destroy,
 569         cond_destroy_bool,
 570         sens_destroy,
 571         cat_destroy,
 572 };
 573
 574 static void ocontext_destroy(struct ocontext *c, int i)
 575 {
 576         context_destroy(&c->context[0]);
 577         context_destroy(&c->context[1]);
 578         if (i == OCON_ISID || i == OCON_FS ||
 579             i == OCON_NETIF || i == OCON_FSUSE)
 580                 kfree(c->u.name);
 581         kfree(c);
 582 }
 583
 584 /*
 585  * Free any memory allocated by a policy database structure.
 586  */
 587 void policydb_destroy(struct policydb *p)
 588 {
 589         struct ocontext *c, *ctmp;
 590         struct genfs *g, *gtmp;
 591         int i;
 592         struct role_allow *ra, *lra = NULL;
 593         struct role_trans *tr, *ltr = NULL;
 594         struct range_trans *rt, *lrt = NULL;
 595
 596         for (i = 0; i < SYM_NUM; i++) {
 597                 hashtab_map(p->symtab[i].table, destroy_f[i], NULL);
 598                 hashtab_destroy(p->symtab[i].table);
 599         }
 600
 601         for (i = 0; i < SYM_NUM; i++)
 602                 kfree(p->sym_val_to_name[i]);
 603
 604         kfree(p->class_val_to_struct);
 605         kfree(p->role_val_to_struct);
 606         kfree(p->user_val_to_struct);
 607
 608         avtab_destroy(&p->te_avtab);
 609
 610         for (i = 0; i < OCON_NUM; i++) {
 611                 c = p->ocontexts[i];
 612                 while (c) {
 613                         ctmp = c;
 614                         c = c->next;
 615                         ocontext_destroy(ctmp,i);
 616                 }
 617         }
 618
 619         g = p->genfs;
 620         while (g) {
 621                 kfree(g->fstype);
 622                 c = g->head;
 623                 while (c) {
 624                         ctmp = c;
 625                         c = c->next;
 626                         ocontext_destroy(ctmp,OCON_FSUSE);
 627                 }
 628                 gtmp = g;
 629                 g = g->next;
 630                 kfree(gtmp);
 631         }
 632
 633         cond_policydb_destroy(p);
 634
 635         for (tr = p->role_tr; tr; tr = tr->next) {
 636                 if (ltr) kfree(ltr);
 637                 ltr = tr;
 638         }
 639         if (ltr) kfree(ltr);
 640
 641         for (ra = p->role_allow; ra; ra = ra -> next) {
 642                 if (lra) kfree(lra);
 643                 lra = ra;
 644         }
 645         if (lra) kfree(lra);
 646
 647         for (rt = p->range_tr; rt; rt = rt -> next) {
 648                 if (lrt) kfree(lrt);
 649                 lrt = rt;
 650         }
 651         if (lrt) kfree(lrt);
 652
 653         for (i = 0; i < p->p_types.nprim; i++)
 654                 ebitmap_destroy(&p->type_attr_map[i]);
 655         kfree(p->type_attr_map);
 656
 657         return;
 658 }
 659
 660 /*
 661  * Load the initial SIDs specified in a policy database
 662  * structure into a SID table.
 663  */
 664 int policydb_load_isids(struct policydb *p, struct sidtab *s)
 665 {
 666         struct ocontext *head, *c;
 667         int rc;
 668
 669         rc = sidtab_init(s);
 670         if (rc) {
 671                 printk(KERN_ERR "security:  out of memory on SID table init\n");
 672                 goto out;
 673         }
 674
 675         head = p->ocontexts[OCON_ISID];
 676         for (c = head; c; c = c->next) {
 677                 if (!c->context[0].user) {
 678                         printk(KERN_ERR "security:  SID %s was never "
 679                                "defined.\n", c->u.name);
 680                         rc = -EINVAL;
 681                         goto out;
 682                 }
 683                 if (sidtab_insert(s, c->sid[0], &c->context[0])) {
 684                         printk(KERN_ERR "security:  unable to load initial "
 685                                "SID %s.\n", c->u.name);
 686                         rc = -EINVAL;
 687                         goto out;
 688                 }
 689         }
 690 out:
 691         return rc;
 692 }
 693
 694 /*
 695  * Return 1 if the fields in the security context
 696  * structure `c' are valid.  Return 0 otherwise.
 697  */
 698 int policydb_context_isvalid(struct policydb *p, struct context *c)
 699 {
 700         struct role_datum *role;
 701         struct user_datum *usrdatum;
 702
 703         if (!c->role || c->role > p->p_roles.nprim)
 704                 return 0;
 705
 706         if (!c->user || c->user > p->p_users.nprim)
 707                 return 0;
 708
 709         if (!c->type || c->type > p->p_types.nprim)
 710                 return 0;
 711
 712         if (c->role != OBJECT_R_VAL) {
 713                 /*
 714                  * Role must be authorized for the type.
 715                  */
 716                 role = p->role_val_to_struct[c->role - 1];
 717                 if (!ebitmap_get_bit(&role->types,
 718                                      c->type - 1))
 719                         /* role may not be associated with type */
 720                         return 0;
 721
 722                 /*
 723                  * User must be authorized for the role.
 724                  */
 725                 usrdatum = p->user_val_to_struct[c->user - 1];
 726                 if (!usrdatum)
 727                         return 0;
 728
 729                 if (!ebitmap_get_bit(&usrdatum->roles,
 730                                      c->role - 1))
 731                         /* user may not be associated with role */
 732                         return 0;
 733         }
 734
 735         if (!mls_context_isvalid(p, c))
 736                 return 0;
 737
 738         return 1;
 739 }
 740
 741 /*
 742  * Read a MLS range structure from a policydb binary
 743  * representation file.
 744  */
 745 static int mls_read_range_helper(struct mls_range *r, void *fp)
 746 {
 747         __le32 buf[2];
 748         u32 items;
 749         int rc;
 750
 751         rc = next_entry(buf, fp, sizeof(u32));
 752         if (rc < 0)
 753                 goto out;
 754
 755         items = le32_to_cpu(buf[0]);
 756         if (items > ARRAY_SIZE(buf)) {
 757                 printk(KERN_ERR "security: mls:  range overflow\n");
 758                 rc = -EINVAL;
 759                 goto out;
 760         }
 761         rc = next_entry(buf, fp, sizeof(u32) * items);
 762         if (rc < 0) {
 763                 printk(KERN_ERR "security: mls:  truncated range\n");
 764                 goto out;
 765         }
 766         r->level[0].sens = le32_to_cpu(buf[0]);
 767         if (items > 1)
 768                 r->level[1].sens = le32_to_cpu(buf[1]);
 769         else
 770                 r->level[1].sens = r->level[0].sens;
 771
 772         rc = ebitmap_read(&r->level[0].cat, fp);
 773         if (rc) {
 774                 printk(KERN_ERR "security: mls:  error reading low "
 775                        "categories\n");
 776                 goto out;
 777         }
 778         if (items > 1) {
 779                 rc = ebitmap_read(&r->level[1].cat, fp);
 780                 if (rc) {
 781                         printk(KERN_ERR "security: mls:  error reading high "
 782                                "categories\n");
 783                         goto bad_high;
 784                 }
 785         } else {
 786                 rc = ebitmap_cpy(&r->level[1].cat, &r->level[0].cat);
 787                 if (rc) {
 788                         printk(KERN_ERR "security: mls:  out of memory\n");
 789                         goto bad_high;
 790                 }
 791         }
 792
 793         rc = 0;
 794 out:
 795         return rc;
 796 bad_high:
 797         ebitmap_destroy(&r->level[0].cat);
 798         goto out;
 799 }
 800
 801 /*
 802  * Read and validate a security context structure
 803  * from a policydb binary representation file.
 804  */
 805 static int context_read_and_validate(struct context *c,
 806                                      struct policydb *p,
 807                                      void *fp)
 808 {
 809         __le32 buf[3];
 810         int rc;
 811
 812         rc = next_entry(buf, fp, sizeof buf);
 813         if (rc < 0) {
 814                 printk(KERN_ERR "security: context truncated\n");
 815                 goto out;
 816         }
 817         c->user = le32_to_cpu(buf[0]);
 818         c->role = le32_to_cpu(buf[1]);
 819         c->type = le32_to_cpu(buf[2]);
 820         if (p->policyvers >= POLICYDB_VERSION_MLS) {
 821                 if (mls_read_range_helper(&c->range, fp)) {
 822                         printk(KERN_ERR "security: error reading MLS range of "
 823                                "context\n");
 824                         rc = -EINVAL;
 825                         goto out;
 826                 }
 827         }
 828
 829         if (!policydb_context_isvalid(p, c)) {
 830                 printk(KERN_ERR "security:  invalid security context\n");
 831                 context_destroy(c);
 832                 rc = -EINVAL;
 833         }
 834 out:
 835         return rc;
 836 }
 837
 838 /*
 839  * The following *_read functions are used to
 840  * read the symbol data from a policy database
 841  * binary representation file.
 842  */
 843
 844 static int perm_read(struct policydb *p, struct hashtab *h, void *fp)
 845 {
 846         char *key = NULL;
 847         struct perm_datum *perdatum;
 848         int rc;
 849         __le32 buf[2];
 850         u32 len;
 851
 852         perdatum = kmalloc(sizeof(*perdatum), GFP_KERNEL);
 853         if (!perdatum) {
 854                 rc = -ENOMEM;
 855                 goto out;
 856         }
 857         memset(perdatum, 0, sizeof(*perdatum));
 858
 859         rc = next_entry(buf, fp, sizeof buf);
 860         if (rc < 0)
 861                 goto bad;
 862
 863         len = le32_to_cpu(buf[0]);
 864         perdatum->value = le32_to_cpu(buf[1]);
 865
 866         key = kmalloc(len + 1,GFP_KERNEL);
 867         if (!key) {
 868                 rc = -ENOMEM;
 869                 goto bad;
 870         }
 871         rc = next_entry(key, fp, len);
 872         if (rc < 0)
 873                 goto bad;
 874         key[len] = 0;
 875
 876         rc = hashtab_insert(h, key, perdatum);
 877         if (rc)
 878                 goto bad;
 879 out:
 880         return rc;
 881 bad:
 882         perm_destroy(key, perdatum, NULL);
 883         goto out;
 884 }
 885
 886 static int common_read(struct policydb *p, struct hashtab *h, void *fp)
 887 {
 888         char *key = NULL;
 889         struct common_datum *comdatum;
 890         __le32 buf[4];
 891         u32 len, nel;
 892         int i, rc;
 893
 894         comdatum = kmalloc(sizeof(*comdatum), GFP_KERNEL);
 895         if (!comdatum) {
 896                 rc = -ENOMEM;
 897                 goto out;
 898         }
 899         memset(comdatum, 0, sizeof(*comdatum));
 900
 901         rc = next_entry(buf, fp, sizeof buf);
 902         if (rc < 0)
 903                 goto bad;
 904
 905         len = le32_to_cpu(buf[0]);
 906         comdatum->value = le32_to_cpu(buf[1]);
 907
 908         rc = symtab_init(&comdatum->permissions, PERM_SYMTAB_SIZE);
 909         if (rc)
 910                 goto bad;
 911         comdatum->permissions.nprim = le32_to_cpu(buf[2]);
 912         nel = le32_to_cpu(buf[3]);
 913
 914         key = kmalloc(len + 1,GFP_KERNEL);
 915         if (!key) {
 916                 rc = -ENOMEM;
 917                 goto bad;
 918         }
 919         rc = next_entry(key, fp, len);
 920         if (rc < 0)
 921                 goto bad;
 922         key[len] = 0;
 923
 924         for (i = 0; i < nel; i++) {
 925                 rc = perm_read(p, comdatum->permissions.table, fp);
 926                 if (rc)
 927                         goto bad;
 928         }
 929
 930         rc = hashtab_insert(h, key, comdatum);
 931         if (rc)
 932                 goto bad;
 933 out:
 934         return rc;
 935 bad:
 936         common_destroy(key, comdatum, NULL);
 937         goto out;
 938 }
 939
 940 static int read_cons_helper(struct constraint_node **nodep, int ncons,
 941                             int allowxtarget, void *fp)
 942 {
 943         struct constraint_node *c, *lc;
 944         struct constraint_expr *e, *le;
 945         __le32 buf[3];
 946         u32 nexpr;
 947         int rc, i, j, depth;
 948
 949         lc = NULL;
 950         for (i = 0; i < ncons; i++) {
 951                 c = kmalloc(sizeof(*c), GFP_KERNEL);
 952                 if (!c)
 953                         return -ENOMEM;
 954                 memset(c, 0, sizeof(*c));
 955
 956                 if (lc) {
 957                         lc->next = c;
 958                 } else {
 959                         *nodep = c;
 960                 }
 961
 962                 rc = next_entry(buf, fp, (sizeof(u32) * 2));
 963                 if (rc < 0)
 964                         return rc;
 965                 c->permissions = le32_to_cpu(buf[0]);
 966                 nexpr = le32_to_cpu(buf[1]);
 967                 le = NULL;
 968                 depth = -1;
 969                 for (j = 0; j < nexpr; j++) {
 970                         e = kmalloc(sizeof(*e), GFP_KERNEL);
 971                         if (!e)
 972                                 return -ENOMEM;
 973                         memset(e, 0, sizeof(*e));
 974
 975                         if (le) {
 976                                 le->next = e;
 977                         } else {
 978                                 c->expr = e;
 979                         }
 980
 981                         rc = next_entry(buf, fp, (sizeof(u32) * 3));
 982                         if (rc < 0)
 983                                 return rc;
 984                         e->expr_type = le32_to_cpu(buf[0]);
 985                         e->attr = le32_to_cpu(buf[1]);
 986                         e->op = le32_to_cpu(buf[2]);
 987
 988                         switch (e->expr_type) {
 989                         case CEXPR_NOT:
 990                                 if (depth < 0)
 991                                         return -EINVAL;
 992                                 break;
 993                         case CEXPR_AND:
 994                         case CEXPR_OR:
 995                                 if (depth < 1)
 996                                         return -EINVAL;
 997                                 depth--;
 998                                 break;
 999                         case CEXPR_ATTR:
1000                                 if (depth == (CEXPR_MAXDEPTH - 1))
1001                                         return -EINVAL;
1002                                 depth++;
1003                                 break;
1004                         case CEXPR_NAMES:
1005                                 if (!allowxtarget && (e->attr & CEXPR_XTARGET))
1006                                         return -EINVAL;
1007                                 if (depth == (CEXPR_MAXDEPTH - 1))
1008                                         return -EINVAL;
1009                                 depth++;
1010                                 if (ebitmap_read(&e->names, fp))
1011                                         return -EINVAL;
1012                                 break;
1013                         default:
1014                                 return -EINVAL;
1015                         }
1016                         le = e;
1017                 }
1018                 if (depth != 0)
1019                         return -EINVAL;
1020                 lc = c;
1021         }
1022
1023         return 0;
1024 }
1025
1026 static int class_read(struct policydb *p, struct hashtab *h, void *fp)
1027 {
1028         char *key = NULL;
1029         struct class_datum *cladatum;
1030         __le32 buf[6];
1031         u32 len, len2, ncons, nel;
1032         int i, rc;
1033
1034         cladatum = kmalloc(sizeof(*cladatum), GFP_KERNEL);
1035         if (!cladatum) {
1036                 rc = -ENOMEM;
1037                 goto out;
1038         }
1039         memset(cladatum, 0, sizeof(*cladatum));
1040
1041         rc = next_entry(buf, fp, sizeof(u32)*6);
1042         if (rc < 0)
1043                 goto bad;
1044
1045         len = le32_to_cpu(buf[0]);
1046         len2 = le32_to_cpu(buf[1]);
1047         cladatum->value = le32_to_cpu(buf[2]);
1048
1049         rc = symtab_init(&cladatum->permissions, PERM_SYMTAB_SIZE);
1050         if (rc)
1051                 goto bad;
1052         cladatum->permissions.nprim = le32_to_cpu(buf[3]);
1053         nel = le32_to_cpu(buf[4]);
1054
1055         ncons = le32_to_cpu(buf[5]);
1056
1057         key = kmalloc(len + 1,GFP_KERNEL);
1058         if (!key) {
1059                 rc = -ENOMEM;
1060                 goto bad;
1061         }
1062         rc = next_entry(key, fp, len);
1063         if (rc < 0)
1064                 goto bad;
1065         key[len] = 0;
1066
1067         if (len2) {
1068                 cladatum->comkey = kmalloc(len2 + 1,GFP_KERNEL);
1069                 if (!cladatum->comkey) {
1070                         rc = -ENOMEM;
1071                         goto bad;
1072                 }
1073                 rc = next_entry(cladatum->comkey, fp, len2);
1074                 if (rc < 0)
1075                         goto bad;
1076                 cladatum->comkey[len2] = 0;
1077
1078                 cladatum->comdatum = hashtab_search(p->p_commons.table,
1079                                                     cladatum->comkey);
1080                 if (!cladatum->comdatum) {
1081                         printk(KERN_ERR "security:  unknown common %s\n",
1082                                cladatum->comkey);
1083                         rc = -EINVAL;
1084                         goto bad;
1085                 }
1086         }
1087         for (i = 0; i < nel; i++) {
1088                 rc = perm_read(p, cladatum->permissions.table, fp);
1089                 if (rc)
1090                         goto bad;
1091         }
1092
1093         rc = read_cons_helper(&cladatum->constraints, ncons, 0, fp);
1094         if (rc)
1095                 goto bad;
1096
1097         if (p->policyvers >= POLICYDB_VERSION_VALIDATETRANS) {
1098                 /* grab the validatetrans rules */
1099                 rc = next_entry(buf, fp, sizeof(u32));
1100                 if (rc < 0)
1101                         goto bad;
1102                 ncons = le32_to_cpu(buf[0]);
1103                 rc = read_cons_helper(&cladatum->validatetrans, ncons, 1, fp);
1104                 if (rc)
1105                         goto bad;
1106         }
1107
1108         rc = hashtab_insert(h, key, cladatum);
1109         if (rc)
1110                 goto bad;
1111
1112         rc = 0;
1113 out:
1114         return rc;
1115 bad:
1116         class_destroy(key, cladatum, NULL);
1117         goto out;
1118 }
1119
1120 static int role_read(struct policydb *p, struct hashtab *h, void *fp)
1121 {
1122         char *key = NULL;
1123         struct role_datum *role;
1124         int rc;
1125         __le32 buf[2];
1126         u32 len;
1127
1128         role = kmalloc(sizeof(*role), GFP_KERNEL);
1129         if (!role) {
1130                 rc = -ENOMEM;
1131                 goto out;
1132         }
1133         memset(role, 0, sizeof(*role));
1134
1135         rc = next_entry(buf, fp, sizeof buf);
1136         if (rc < 0)
1137                 goto bad;
1138
1139         len = le32_to_cpu(buf[0]);
1140         role->value = le32_to_cpu(buf[1]);
1141
1142         key = kmalloc(len + 1,GFP_KERNEL);
1143         if (!key) {
1144                 rc = -ENOMEM;
1145                 goto bad;
1146         }
1147         rc = next_entry(key, fp, len);
1148         if (rc < 0)
1149                 goto bad;
1150         key[len] = 0;
1151
1152         rc = ebitmap_read(&role->dominates, fp);
1153         if (rc)
1154                 goto bad;
1155
1156         rc = ebitmap_read(&role->types, fp);
1157         if (rc)
1158                 goto bad;
1159
1160         if (strcmp(key, OBJECT_R) == 0) {
1161                 if (role->value != OBJECT_R_VAL) {
1162                         printk(KERN_ERR "Role %s has wrong value %d\n",
1163                                OBJECT_R, role->value);
1164                         rc = -EINVAL;
1165                         goto bad;
1166                 }
1167                 rc = 0;
1168                 goto bad;
1169         }
1170
1171         rc = hashtab_insert(h, key, role);
1172         if (rc)
1173                 goto bad;
1174 out:
1175         return rc;
1176 bad:
1177         role_destroy(key, role, NULL);
1178         goto out;
1179 }
1180
1181 static int type_read(struct policydb *p, struct hashtab *h, void *fp)
1182 {
1183         char *key = NULL;
1184         struct type_datum *typdatum;
1185         int rc;
1186         __le32 buf[3];
1187         u32 len;
1188
1189         typdatum = kmalloc(sizeof(*typdatum),GFP_KERNEL);
1190         if (!typdatum) {
1191                 rc = -ENOMEM;
1192                 return rc;
1193         }
1194         memset(typdatum, 0, sizeof(*typdatum));
1195
1196         rc = next_entry(buf, fp, sizeof buf);
1197         if (rc < 0)
1198                 goto bad;
1199
1200         len = le32_to_cpu(buf[0]);
1201         typdatum->value = le32_to_cpu(buf[1]);
1202         typdatum->primary = le32_to_cpu(buf[2]);
1203
1204         key = kmalloc(len + 1,GFP_KERNEL);
1205         if (!key) {
1206                 rc = -ENOMEM;
1207                 goto bad;
1208         }
1209         rc = next_entry(key, fp, len);
1210         if (rc < 0)
1211                 goto bad;
1212         key[len] = 0;
1213
1214         rc = hashtab_insert(h, key, typdatum);
1215         if (rc)
1216                 goto bad;
1217 out:
1218         return rc;
1219 bad:
1220         type_destroy(key, typdatum, NULL);
1221         goto out;
1222 }
1223
1224
1225 /*
1226  * Read a MLS level structure from a policydb binary
1227  * representation file.
1228  */
1229 static int mls_read_level(struct mls_level *lp, void *fp)
1230 {
1231         __le32 buf[1];
1232         int rc;
1233
1234         memset(lp, 0, sizeof(*lp));
1235
1236         rc = next_entry(buf, fp, sizeof buf);
1237         if (rc < 0) {
1238                 printk(KERN_ERR "security: mls: truncated level\n");
1239                 goto bad;
1240         }
1241         lp->sens = le32_to_cpu(buf[0]);
1242
1243         if (ebitmap_read(&lp->cat, fp)) {
1244                 printk(KERN_ERR "security: mls:  error reading level "
1245                        "categories\n");
1246                 goto bad;
1247         }
1248         return 0;
1249
1250 bad:
1251         return -EINVAL;
1252 }
1253
1254 static int user_read(struct policydb *p, struct hashtab *h, void *fp)
1255 {
1256         char *key = NULL;
1257         struct user_datum *usrdatum;
1258         int rc;
1259         __le32 buf[2];
1260         u32 len;
1261
1262         usrdatum = kmalloc(sizeof(*usrdatum), GFP_KERNEL);
1263         if (!usrdatum) {
1264                 rc = -ENOMEM;
1265                 goto out;
1266         }
1267         memset(usrdatum, 0, sizeof(*usrdatum));
1268
1269         rc = next_entry(buf, fp, sizeof buf);
1270         if (rc < 0)
1271                 goto bad;
1272
1273         len = le32_to_cpu(buf[0]);
1274         usrdatum->value = le32_to_cpu(buf[1]);
1275
1276         key = kmalloc(len + 1,GFP_KERNEL);
1277         if (!key) {
1278                 rc = -ENOMEM;
1279                 goto bad;
1280         }
1281         rc = next_entry(key, fp, len);
1282         if (rc < 0)
1283                 goto bad;
1284         key[len] = 0;
1285
1286         rc = ebitmap_read(&usrdatum->roles, fp);
1287         if (rc)
1288                 goto bad;
1289
1290         if (p->policyvers >= POLICYDB_VERSION_MLS) {
1291                 rc = mls_read_range_helper(&usrdatum->range, fp);
1292                 if (rc)
1293                         goto bad;
1294                 rc = mls_read_level(&usrdatum->dfltlevel, fp);
1295                 if (rc)
1296                         goto bad;
1297         }
1298
1299         rc = hashtab_insert(h, key, usrdatum);
1300         if (rc)
1301                 goto bad;
1302 out:
1303         return rc;
1304 bad:
1305         user_destroy(key, usrdatum, NULL);
1306         goto out;
1307 }
1308
1309 static int sens_read(struct policydb *p, struct hashtab *h, void *fp)
1310 {
1311         char *key = NULL;
1312         struct level_datum *levdatum;
1313         int rc;
1314         __le32 buf[2];
1315         u32 len;
1316
1317         levdatum = kmalloc(sizeof(*levdatum), GFP_ATOMIC);
1318         if (!levdatum) {
1319                 rc = -ENOMEM;
1320                 goto out;
1321         }
1322         memset(levdatum, 0, sizeof(*levdatum));
1323
1324         rc = next_entry(buf, fp, sizeof buf);
1325         if (rc < 0)
1326                 goto bad;
1327
1328         len = le32_to_cpu(buf[0]);
1329         levdatum->isalias = le32_to_cpu(buf[1]);
1330
1331         key = kmalloc(len + 1,GFP_ATOMIC);
1332         if (!key) {
1333                 rc = -ENOMEM;
1334                 goto bad;
1335         }
1336         rc = next_entry(key, fp, len);
1337         if (rc < 0)
1338                 goto bad;
1339         key[len] = 0;
1340
1341         levdatum->level = kmalloc(sizeof(struct mls_level), GFP_ATOMIC);
1342         if (!levdatum->level) {
1343                 rc = -ENOMEM;
1344                 goto bad;
1345         }
1346         if (mls_read_level(levdatum->level, fp)) {
1347                 rc = -EINVAL;
1348                 goto bad;
1349         }
1350
1351         rc = hashtab_insert(h, key, levdatum);
1352         if (rc)
1353                 goto bad;
1354 out:
1355         return rc;
1356 bad:
1357         sens_destroy(key, levdatum, NULL);
1358         goto out;
1359 }
1360
1361 static int cat_read(struct policydb *p, struct hashtab *h, void *fp)
1362 {
1363         char *key = NULL;
1364         struct cat_datum *catdatum;
1365         int rc;
1366         __le32 buf[3];
1367         u32 len;
1368
1369         catdatum = kmalloc(sizeof(*catdatum), GFP_ATOMIC);
1370         if (!catdatum) {
1371                 rc = -ENOMEM;
1372                 goto out;
1373         }
1374         memset(catdatum, 0, sizeof(*catdatum));
1375
1376         rc = next_entry(buf, fp, sizeof buf);
1377         if (rc < 0)
1378                 goto bad;
1379
1380         len = le32_to_cpu(buf[0]);
1381         catdatum->value = le32_to_cpu(buf[1]);
1382         catdatum->isalias = le32_to_cpu(buf[2]);
1383
1384         key = kmalloc(len + 1,GFP_ATOMIC);
1385         if (!key) {
1386                 rc = -ENOMEM;
1387                 goto bad;
1388         }
1389         rc = next_entry(key, fp, len);
1390         if (rc < 0)
1391                 goto bad;
1392         key[len] = 0;
1393
1394         rc = hashtab_insert(h, key, catdatum);
1395         if (rc)
1396                 goto bad;
1397 out:
1398         return rc;
1399
1400 bad:
1401         cat_destroy(key, catdatum, NULL);
1402         goto out;
1403 }
1404
1405 static int (*read_f[SYM_NUM]) (struct policydb *p, struct hashtab *h, void *fp) =
1406 {
1407         common_read,
1408         class_read,
1409         role_read,
1410         type_read,
1411         user_read,
1412         cond_read_bool,
1413         sens_read,
1414         cat_read,
1415 };
1416
1417 extern int ss_initialized;
1418
1419 /*
1420  * Read the configuration data from a policy database binary
1421  * representation file into a policy database structure.
1422  */
1423 int policydb_read(struct policydb *p, void *fp)
1424 {
1425         struct role_allow *ra, *lra;
1426         struct role_trans *tr, *ltr;
1427         struct ocontext *l, *c, *newc;
1428         struct genfs *genfs_p, *genfs, *newgenfs;
1429         int i, j, rc;
1430         __le32 buf[8];
1431         u32 len, len2, config, nprim, nel, nel2;
1432         char *policydb_str;
1433         struct policydb_compat_info *info;
1434         struct range_trans *rt, *lrt;
1435
1436         config = 0;
1437
1438         rc = policydb_init(p);
1439         if (rc)
1440                 goto out;
1441
1442         /* Read the magic number and string length. */
1443         rc = next_entry(buf, fp, sizeof(u32)* 2);
1444         if (rc < 0)
1445                 goto bad;
1446
1447         if (le32_to_cpu(buf[0]) != POLICYDB_MAGIC) {
1448                 printk(KERN_ERR "security:  policydb magic number 0x%x does "
1449                        "not match expected magic number 0x%x\n",
1450                        le32_to_cpu(buf[0]), POLICYDB_MAGIC);
1451                 goto bad;
1452         }
1453
1454         len = le32_to_cpu(buf[1]);
1455         if (len != strlen(POLICYDB_STRING)) {
1456                 printk(KERN_ERR "security:  policydb string length %d does not "
1457                        "match expected length %Zu\n",
1458                        len, strlen(POLICYDB_STRING));
1459                 goto bad;
1460         }
1461         policydb_str = kmalloc(len + 1,GFP_KERNEL);
1462         if (!policydb_str) {
1463                 printk(KERN_ERR "security:  unable to allocate memory for policydb "
1464                        "string of length %d\n", len);
1465                 rc = -ENOMEM;
1466                 goto bad;
1467         }
1468         rc = next_entry(policydb_str, fp, len);
1469         if (rc < 0) {
1470                 printk(KERN_ERR "security:  truncated policydb string identifier\n");
1471                 kfree(policydb_str);
1472                 goto bad;
1473         }
1474         policydb_str[len] = 0;
1475         if (strcmp(policydb_str, POLICYDB_STRING)) {
1476                 printk(KERN_ERR "security:  policydb string %s does not match "
1477                        "my string %s\n", policydb_str, POLICYDB_STRING);
1478                 kfree(policydb_str);
1479                 goto bad;
1480         }
1481         /* Done with policydb_str. */
1482         kfree(policydb_str);
1483         policydb_str = NULL;
1484
1485         /* Read the version, config, and table sizes. */
1486         rc = next_entry(buf, fp, sizeof(u32)*4);
1487         if (rc < 0)
1488                 goto bad;
1489
1490         p->policyvers = le32_to_cpu(buf[0]);
1491         if (p->policyvers < POLICYDB_VERSION_MIN ||
1492             p->policyvers > POLICYDB_VERSION_MAX) {
1493                 printk(KERN_ERR "security:  policydb version %d does not match "
1494                        "my version range %d-%d\n",
1495                        le32_to_cpu(buf[0]), POLICYDB_VERSION_MIN, POLICYDB_VERSION_MAX);
1496                 goto bad;
1497         }
1498
1499         if ((le32_to_cpu(buf[1]) & POLICYDB_CONFIG_MLS)) {
1500                 if (ss_initialized && !selinux_mls_enabled) {
1501                         printk(KERN_ERR "Cannot switch between non-MLS and MLS "
1502                                "policies\n");
1503                         goto bad;
1504                 }
1505                 selinux_mls_enabled = 1;
1506                 config |= POLICYDB_CONFIG_MLS;
1507
1508                 if (p->policyvers < POLICYDB_VERSION_MLS) {
1509                         printk(KERN_ERR "security policydb version %d (MLS) "
1510                                "not backwards compatible\n", p->policyvers);
1511                         goto bad;
1512                 }
1513         } else {
1514                 if (ss_initialized && selinux_mls_enabled) {
1515                         printk(KERN_ERR "Cannot switch between MLS and non-MLS "
1516                                "policies\n");
1517                         goto bad;
1518                 }
1519         }
1520
1521         info = policydb_lookup_compat(p->policyvers);
1522         if (!info) {
1523                 printk(KERN_ERR "security:  unable to find policy compat info "
1524                        "for version %d\n", p->policyvers);
1525                 goto bad;
1526         }
1527
1528         if (le32_to_cpu(buf[2]) != info->sym_num ||
1529                 le32_to_cpu(buf[3]) != info->ocon_num) {
1530                 printk(KERN_ERR "security:  policydb table sizes (%d,%d) do "
1531                        "not match mine (%d,%d)\n", le32_to_cpu(buf[2]),
1532                         le32_to_cpu(buf[3]),
1533                        info->sym_num, info->ocon_num);
1534                 goto bad;
1535         }
1536
1537         for (i = 0; i < info->sym_num; i++) {
1538                 rc = next_entry(buf, fp, sizeof(u32)*2);
1539                 if (rc < 0)
1540                         goto bad;
1541                 nprim = le32_to_cpu(buf[0]);
1542                 nel = le32_to_cpu(buf[1]);
1543                 for (j = 0; j < nel; j++) {
1544                         rc = read_f[i](p, p->symtab[i].table, fp);
1545                         if (rc)
1546                                 goto bad;
1547                 }
1548
1549                 p->symtab[i].nprim = nprim;
1550         }
1551
1552         rc = avtab_read(&p->te_avtab, fp, p->policyvers);
1553         if (rc)
1554                 goto bad;
1555
1556         if (p->policyvers >= POLICYDB_VERSION_BOOL) {
1557                 rc = cond_read_list(p, fp);
1558                 if (rc)
1559                         goto bad;
1560         }
1561
1562         rc = next_entry(buf, fp, sizeof(u32));
1563         if (rc < 0)
1564                 goto bad;
1565         nel = le32_to_cpu(buf[0]);
1566         ltr = NULL;
1567         for (i = 0; i < nel; i++) {
1568                 tr = kmalloc(sizeof(*tr), GFP_KERNEL);
1569                 if (!tr) {
1570                         rc = -ENOMEM;
1571                         goto bad;
1572                 }
1573                 memset(tr, 0, sizeof(*tr));
1574                 if (ltr) {
1575                         ltr->next = tr;
1576                 } else {
1577                         p->role_tr = tr;
1578                 }
1579                 rc = next_entry(buf, fp, sizeof(u32)*3);
1580                 if (rc < 0)
1581                         goto bad;
1582                 tr->role = le32_to_cpu(buf[0]);
1583                 tr->type = le32_to_cpu(buf[1]);
1584                 tr->new_role = le32_to_cpu(buf[2]);
1585                 ltr = tr;
1586         }
1587
1588         rc = next_entry(buf, fp, sizeof(u32));
1589         if (rc < 0)
1590                 goto bad;
1591         nel = le32_to_cpu(buf[0]);
1592         lra = NULL;
1593         for (i = 0; i < nel; i++) {
1594                 ra = kmalloc(sizeof(*ra), GFP_KERNEL);
1595                 if (!ra) {
1596                         rc = -ENOMEM;
1597                         goto bad;
1598                 }
1599                 memset(ra, 0, sizeof(*ra));
1600                 if (lra) {
1601                         lra->next = ra;
1602                 } else {
1603                         p->role_allow = ra;
1604                 }
1605                 rc = next_entry(buf, fp, sizeof(u32)*2);
1606                 if (rc < 0)
1607                         goto bad;
1608                 ra->role = le32_to_cpu(buf[0]);
1609                 ra->new_role = le32_to_cpu(buf[1]);
1610                 lra = ra;
1611         }
1612
1613         rc = policydb_index_classes(p);
1614         if (rc)
1615                 goto bad;
1616
1617         rc = policydb_index_others(p);
1618         if (rc)
1619                 goto bad;
1620
1621         for (i = 0; i < info->ocon_num; i++) {
1622                 rc = next_entry(buf, fp, sizeof(u32));
1623                 if (rc < 0)
1624                         goto bad;
1625                 nel = le32_to_cpu(buf[0]);
1626                 l = NULL;
1627                 for (j = 0; j < nel; j++) {
1628                         c = kmalloc(sizeof(*c), GFP_KERNEL);
1629                         if (!c) {
1630                                 rc = -ENOMEM;
1631                                 goto bad;
1632                         }
1633                         memset(c, 0, sizeof(*c));
1634                         if (l) {
1635                                 l->next = c;
1636                         } else {
1637                                 p->ocontexts[i] = c;
1638                         }
1639                         l = c;
1640                         rc = -EINVAL;
1641                         switch (i) {
1642                         case OCON_ISID:
1643                                 rc = next_entry(buf, fp, sizeof(u32));
1644                                 if (rc < 0)
1645                                         goto bad;
1646                                 c->sid[0] = le32_to_cpu(buf[0]);
1647                                 rc = context_read_and_validate(&c->context[0], p, fp);
1648                                 if (rc)
1649                                         goto bad;
1650                                 break;
1651                         case OCON_FS:
1652                         case OCON_NETIF:
1653                                 rc = next_entry(buf, fp, sizeof(u32));
1654                                 if (rc < 0)
1655                                         goto bad;
1656                                 len = le32_to_cpu(buf[0]);
1657                                 c->u.name = kmalloc(len + 1,GFP_KERNEL);
1658                                 if (!c->u.name) {
1659                                         rc = -ENOMEM;
1660                                         goto bad;
1661                                 }
1662                                 rc = next_entry(c->u.name, fp, len);
1663                                 if (rc < 0)
1664                                         goto bad;
1665                                 c->u.name[len] = 0;
1666                                 rc = context_read_and_validate(&c->context[0], p, fp);
1667                                 if (rc)
1668                                         goto bad;
1669                                 rc = context_read_and_validate(&c->context[1], p, fp);
1670                                 if (rc)
1671                                         goto bad;
1672                                 break;
1673                         case OCON_PORT:
1674                                 rc = next_entry(buf, fp, sizeof(u32)*3);
1675                                 if (rc < 0)
1676                                         goto bad;
1677                                 c->u.port.protocol = le32_to_cpu(buf[0]);
1678                                 c->u.port.low_port = le32_to_cpu(buf[1]);
1679                                 c->u.port.high_port = le32_to_cpu(buf[2]);
1680                                 rc = context_read_and_validate(&c->context[0], p, fp);
1681                                 if (rc)
1682                                         goto bad;
1683                                 break;
1684                         case OCON_NODE:
1685                                 rc = next_entry(buf, fp, sizeof(u32)* 2);
1686                                 if (rc < 0)
1687                                         goto bad;
1688                                 c->u.node.addr = le32_to_cpu(buf[0]);
1689                                 c->u.node.mask = le32_to_cpu(buf[1]);
1690                                 rc = context_read_and_validate(&c->context[0], p, fp);
1691                                 if (rc)
1692                                         goto bad;
1693                                 break;
1694                         case OCON_FSUSE:
1695                                 rc = next_entry(buf, fp, sizeof(u32)*2);
1696                                 if (rc < 0)
1697                                         goto bad;
1698                                 c->v.behavior = le32_to_cpu(buf[0]);
1699                                 if (c->v.behavior > SECURITY_FS_USE_NONE)
1700                                         goto bad;
1701                                 len = le32_to_cpu(buf[1]);
1702                                 c->u.name = kmalloc(len + 1,GFP_KERNEL);
1703                                 if (!c->u.name) {
1704                                         rc = -ENOMEM;
1705                                         goto bad;
1706                                 }
1707                                 rc = next_entry(c->u.name, fp, len);
1708                                 if (rc < 0)
1709                                         goto bad;
1710                                 c->u.name[len] = 0;
1711                                 rc = context_read_and_validate(&c->context[0], p, fp);
1712                                 if (rc)
1713                                         goto bad;
1714                                 break;
1715                         case OCON_NODE6: {
1716                                 int k;
1717
1718                                 rc = next_entry(buf, fp, sizeof(u32) * 8);
1719                                 if (rc < 0)
1720                                         goto bad;
1721                                 for (k = 0; k < 4; k++)
1722                                         c->u.node6.addr[k] = le32_to_cpu(buf[k]);
1723                                 for (k = 0; k < 4; k++)
1724                                         c->u.node6.mask[k] = le32_to_cpu(buf[k+4]);
1725                                 if (context_read_and_validate(&c->context[0], p, fp))
1726                                         goto bad;
1727                                 break;
1728                         }
1729                         }
1730                 }
1731         }
1732
1733         rc = next_entry(buf, fp, sizeof(u32));
1734         if (rc < 0)
1735                 goto bad;
1736         nel = le32_to_cpu(buf[0]);
1737         genfs_p = NULL;
1738         rc = -EINVAL;
1739         for (i = 0; i < nel; i++) {
1740                 rc = next_entry(buf, fp, sizeof(u32));
1741                 if (rc < 0)
1742                         goto bad;
1743                 len = le32_to_cpu(buf[0]);
1744                 newgenfs = kmalloc(sizeof(*newgenfs), GFP_KERNEL);
1745                 if (!newgenfs) {
1746                         rc = -ENOMEM;
1747                         goto bad;
1748                 }
1749                 memset(newgenfs, 0, sizeof(*newgenfs));
1750
1751                 newgenfs->fstype = kmalloc(len + 1,GFP_KERNEL);
1752                 if (!newgenfs->fstype) {
1753                         rc = -ENOMEM;
1754                         kfree(newgenfs);
1755                         goto bad;
1756                 }
1757                 rc = next_entry(newgenfs->fstype, fp, len);
1758                 if (rc < 0) {
1759                         kfree(newgenfs->fstype);
1760                         kfree(newgenfs);
1761                         goto bad;
1762                 }
1763                 newgenfs->fstype[len] = 0;
1764                 for (genfs_p = NULL, genfs = p->genfs; genfs;
1765                      genfs_p = genfs, genfs = genfs->next) {
1766                         if (strcmp(newgenfs->fstype, genfs->fstype) == 0) {
1767                                 printk(KERN_ERR "security:  dup genfs "
1768                                        "fstype %s\n", newgenfs->fstype);
1769                                 kfree(newgenfs->fstype);
1770                                 kfree(newgenfs);
1771                                 goto bad;
1772                         }
1773                         if (strcmp(newgenfs->fstype, genfs->fstype) < 0)
1774                                 break;
1775                 }
1776                 newgenfs->next = genfs;
1777                 if (genfs_p)
1778                         genfs_p->next = newgenfs;
1779                 else
1780                         p->genfs = newgenfs;
1781                 rc = next_entry(buf, fp, sizeof(u32));
1782                 if (rc < 0)
1783                         goto bad;
1784                 nel2 = le32_to_cpu(buf[0]);
1785                 for (j = 0; j < nel2; j++) {
1786                         rc = next_entry(buf, fp, sizeof(u32));
1787                         if (rc < 0)
1788                                 goto bad;
1789                         len = le32_to_cpu(buf[0]);
1790
1791                         newc = kmalloc(sizeof(*newc), GFP_KERNEL);
1792                         if (!newc) {
1793                                 rc = -ENOMEM;
1794                                 goto bad;
1795                         }
1796                         memset(newc, 0, sizeof(*newc));
1797
1798                         newc->u.name = kmalloc(len + 1,GFP_KERNEL);
1799                         if (!newc->u.name) {
1800                                 rc = -ENOMEM;
1801                                 goto bad_newc;
1802                         }
1803                         rc = next_entry(newc->u.name, fp, len);
1804                         if (rc < 0)
1805                                 goto bad_newc;
1806                         newc->u.name[len] = 0;
1807                         rc = next_entry(buf, fp, sizeof(u32));
1808                         if (rc < 0)
1809                                 goto bad_newc;
1810                         newc->v.sclass = le32_to_cpu(buf[0]);
1811                         if (context_read_and_validate(&newc->context[0], p, fp))
1812                                 goto bad_newc;
1813                         for (l = NULL, c = newgenfs->head; c;
1814                              l = c, c = c->next) {
1815                                 if (!strcmp(newc->u.name, c->u.name) &&
1816                                     (!c->v.sclass || !newc->v.sclass ||
1817                                      newc->v.sclass == c->v.sclass)) {
1818                                         printk(KERN_ERR "security:  dup genfs "
1819                                                "entry (%s,%s)\n",
1820                                                newgenfs->fstype, c->u.name);
1821                                         goto bad_newc;
1822                                 }
1823                                 len = strlen(newc->u.name);
1824                                 len2 = strlen(c->u.name);
1825                                 if (len > len2)
1826                                         break;
1827                         }
1828
1829                         newc->next = c;
1830                         if (l)
1831                                 l->next = newc;
1832                         else
1833                                 newgenfs->head = newc;
1834                 }
1835         }
1836
1837         if (p->policyvers >= POLICYDB_VERSION_MLS) {
1838                 rc = next_entry(buf, fp, sizeof(u32));
1839                 if (rc < 0)
1840                         goto bad;
1841                 nel = le32_to_cpu(buf[0]);
1842                 lrt = NULL;
1843                 for (i = 0; i < nel; i++) {
1844                         rt = kmalloc(sizeof(*rt), GFP_KERNEL);
1845                         if (!rt) {
1846                                 rc = -ENOMEM;
1847                                 goto bad;
1848                         }
1849                         memset(rt, 0, sizeof(*rt));
1850                         if (lrt)
1851                                 lrt->next = rt;
1852                         else
1853                                 p->range_tr = rt;
1854                         rc = next_entry(buf, fp, (sizeof(u32) * 2));
1855                         if (rc < 0)
1856                                 goto bad;
1857                         rt->dom = le32_to_cpu(buf[0]);
1858                         rt->type = le32_to_cpu(buf[1]);
1859                         rc = mls_read_range_helper(&rt->range, fp);
1860                         if (rc)
1861                                 goto bad;
1862                         lrt = rt;
1863                 }
1864         }
1865
1866         p->type_attr_map = kmalloc(p->p_types.nprim*sizeof(struct ebitmap), GFP_KERNEL);
1867         if (!p->type_attr_map)
1868                 goto bad;
1869
1870         for (i = 0; i < p->p_types.nprim; i++) {
1871                 ebitmap_init(&p->type_attr_map[i]);
1872                 if (p->policyvers >= POLICYDB_VERSION_AVTAB) {
1873                         if (ebitmap_read(&p->type_attr_map[i], fp))
1874                                 goto bad;
1875                 }
1876                 /* add the type itself as the degenerate case */
1877                 if (ebitmap_set_bit(&p->type_attr_map[i], i, 1))
1878                                 goto bad;
1879         }
1880
1881         rc = 0;
1882 out:
1883         return rc;
1884 bad_newc:
1885         ocontext_destroy(newc,OCON_FSUSE);
1886 bad:
1887         if (!rc)
1888                 rc = -EINVAL;
1889         policydb_destroy(p);
1890         goto out;
1891 }