2 * Implementation of the policy database.
4 * Author : Stephen Smalley, <sds@epoch.ncsc.mil>
8 * Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com>
10 * Support for enhanced MLS infrastructure.
12 * Updated: Frank Mayer <mayerf@tresys.com> and Karl MacMillan <kmacmillan@tresys.com>
14 * Added conditional policy language extensions
16 * Updated: Hewlett-Packard <paul@paul-moore.com>
18 * Added support for the policy capability bitmap
20 * Copyright (C) 2007 Hewlett-Packard Development Company, L.P.
21 * Copyright (C) 2004-2005 Trusted Computer Solutions, Inc.
22 * Copyright (C) 2003 - 2004 Tresys Technology, LLC
23 * This program is free software; you can redistribute it and/or modify
24 * it under the terms of the GNU General Public License as published by
25 * the Free Software Foundation, version 2.
28 #include <linux/kernel.h>
29 #include <linux/sched.h>
30 #include <linux/slab.h>
31 #include <linux/string.h>
32 #include <linux/errno.h>
33 #include <linux/audit.h>
34 #include <linux/flex_array.h>
38 #include "conditional.h"
45 static const char *symtab_name[SYM_NUM] = {
57 static unsigned int symtab_sizes[SYM_NUM] = {
68 struct policydb_compat_info {
74 /* These need to be updated if SYM_NUM or OCON_NUM changes */
75 static struct policydb_compat_info policydb_compat[] = {
77 .version = POLICYDB_VERSION_BASE,
78 .sym_num = SYM_NUM - 3,
79 .ocon_num = OCON_NUM - 1,
82 .version = POLICYDB_VERSION_BOOL,
83 .sym_num = SYM_NUM - 2,
84 .ocon_num = OCON_NUM - 1,
87 .version = POLICYDB_VERSION_IPV6,
88 .sym_num = SYM_NUM - 2,
92 .version = POLICYDB_VERSION_NLCLASS,
93 .sym_num = SYM_NUM - 2,
97 .version = POLICYDB_VERSION_MLS,
102 .version = POLICYDB_VERSION_AVTAB,
104 .ocon_num = OCON_NUM,
107 .version = POLICYDB_VERSION_RANGETRANS,
109 .ocon_num = OCON_NUM,
112 .version = POLICYDB_VERSION_POLCAP,
114 .ocon_num = OCON_NUM,
117 .version = POLICYDB_VERSION_PERMISSIVE,
119 .ocon_num = OCON_NUM,
122 .version = POLICYDB_VERSION_BOUNDARY,
124 .ocon_num = OCON_NUM,
127 .version = POLICYDB_VERSION_FILENAME_TRANS,
129 .ocon_num = OCON_NUM,
132 .version = POLICYDB_VERSION_ROLETRANS,
134 .ocon_num = OCON_NUM,
137 .version = POLICYDB_VERSION_NEW_OBJECT_DEFAULTS,
139 .ocon_num = OCON_NUM,
142 .version = POLICYDB_VERSION_DEFAULT_TYPE,
144 .ocon_num = OCON_NUM,
147 .version = POLICYDB_VERSION_CONSTRAINT_NAMES,
149 .ocon_num = OCON_NUM,
152 .version = POLICYDB_VERSION_XPERMS_IOCTL,
154 .ocon_num = OCON_NUM,
158 static struct policydb_compat_info *policydb_lookup_compat(int version)
161 struct policydb_compat_info *info = NULL;
163 for (i = 0; i < ARRAY_SIZE(policydb_compat); i++) {
164 if (policydb_compat[i].version == version) {
165 info = &policydb_compat[i];
173 * Initialize the role table.
175 static int roles_init(struct policydb *p)
179 struct role_datum *role;
182 role = kzalloc(sizeof(*role), GFP_KERNEL);
187 role->value = ++p->p_roles.nprim;
188 if (role->value != OBJECT_R_VAL)
192 key = kstrdup(OBJECT_R, GFP_KERNEL);
196 rc = hashtab_insert(p->p_roles.table, key, role);
207 static u32 filenametr_hash(struct hashtab *h, const void *k)
209 const struct filename_trans *ft = k;
211 unsigned int byte_num;
214 hash = ft->stype ^ ft->ttype ^ ft->tclass;
217 while ((focus = ft->name[byte_num++]))
218 hash = partial_name_hash(focus, hash);
219 return hash & (h->size - 1);
222 static int filenametr_cmp(struct hashtab *h, const void *k1, const void *k2)
224 const struct filename_trans *ft1 = k1;
225 const struct filename_trans *ft2 = k2;
228 v = ft1->stype - ft2->stype;
232 v = ft1->ttype - ft2->ttype;
236 v = ft1->tclass - ft2->tclass;
240 return strcmp(ft1->name, ft2->name);
244 static u32 rangetr_hash(struct hashtab *h, const void *k)
246 const struct range_trans *key = k;
247 return (key->source_type + (key->target_type << 3) +
248 (key->target_class << 5)) & (h->size - 1);
251 static int rangetr_cmp(struct hashtab *h, const void *k1, const void *k2)
253 const struct range_trans *key1 = k1, *key2 = k2;
256 v = key1->source_type - key2->source_type;
260 v = key1->target_type - key2->target_type;
264 v = key1->target_class - key2->target_class;
269 static int (*destroy_f[SYM_NUM]) (void *key, void *datum, void *datap);
272 * Initialize a policy database structure.
274 static int policydb_init(struct policydb *p)
278 memset(p, 0, sizeof(*p));
280 for (i = 0; i < SYM_NUM; i++) {
281 rc = symtab_init(&p->symtab[i], symtab_sizes[i]);
286 rc = avtab_init(&p->te_avtab);
294 rc = cond_policydb_init(p);
298 p->filename_trans = hashtab_create(filenametr_hash, filenametr_cmp, (1 << 10));
299 if (!p->filename_trans) {
304 p->range_tr = hashtab_create(rangetr_hash, rangetr_cmp, 256);
310 ebitmap_init(&p->filename_trans_ttypes);
311 ebitmap_init(&p->policycaps);
312 ebitmap_init(&p->permissive_map);
316 hashtab_destroy(p->filename_trans);
317 hashtab_destroy(p->range_tr);
318 for (i = 0; i < SYM_NUM; i++) {
319 hashtab_map(p->symtab[i].table, destroy_f[i], NULL);
320 hashtab_destroy(p->symtab[i].table);
326 * The following *_index functions are used to
327 * define the val_to_name and val_to_struct arrays
328 * in a policy database structure. The val_to_name
329 * arrays are used when converting security context
330 * structures into string representations. The
331 * val_to_struct arrays are used when the attributes
332 * of a class, role, or user are needed.
335 static int common_index(void *key, void *datum, void *datap)
338 struct common_datum *comdatum;
339 struct flex_array *fa;
343 if (!comdatum->value || comdatum->value > p->p_commons.nprim)
346 fa = p->sym_val_to_name[SYM_COMMONS];
347 if (flex_array_put_ptr(fa, comdatum->value - 1, key,
348 GFP_KERNEL | __GFP_ZERO))
353 static int class_index(void *key, void *datum, void *datap)
356 struct class_datum *cladatum;
357 struct flex_array *fa;
361 if (!cladatum->value || cladatum->value > p->p_classes.nprim)
363 fa = p->sym_val_to_name[SYM_CLASSES];
364 if (flex_array_put_ptr(fa, cladatum->value - 1, key,
365 GFP_KERNEL | __GFP_ZERO))
367 p->class_val_to_struct[cladatum->value - 1] = cladatum;
371 static int role_index(void *key, void *datum, void *datap)
374 struct role_datum *role;
375 struct flex_array *fa;
380 || role->value > p->p_roles.nprim
381 || role->bounds > p->p_roles.nprim)
384 fa = p->sym_val_to_name[SYM_ROLES];
385 if (flex_array_put_ptr(fa, role->value - 1, key,
386 GFP_KERNEL | __GFP_ZERO))
388 p->role_val_to_struct[role->value - 1] = role;
392 static int type_index(void *key, void *datum, void *datap)
395 struct type_datum *typdatum;
396 struct flex_array *fa;
401 if (typdatum->primary) {
403 || typdatum->value > p->p_types.nprim
404 || typdatum->bounds > p->p_types.nprim)
406 fa = p->sym_val_to_name[SYM_TYPES];
407 if (flex_array_put_ptr(fa, typdatum->value - 1, key,
408 GFP_KERNEL | __GFP_ZERO))
411 fa = p->type_val_to_struct_array;
412 if (flex_array_put_ptr(fa, typdatum->value - 1, typdatum,
413 GFP_KERNEL | __GFP_ZERO))
420 static int user_index(void *key, void *datum, void *datap)
423 struct user_datum *usrdatum;
424 struct flex_array *fa;
429 || usrdatum->value > p->p_users.nprim
430 || usrdatum->bounds > p->p_users.nprim)
433 fa = p->sym_val_to_name[SYM_USERS];
434 if (flex_array_put_ptr(fa, usrdatum->value - 1, key,
435 GFP_KERNEL | __GFP_ZERO))
437 p->user_val_to_struct[usrdatum->value - 1] = usrdatum;
441 static int sens_index(void *key, void *datum, void *datap)
444 struct level_datum *levdatum;
445 struct flex_array *fa;
450 if (!levdatum->isalias) {
451 if (!levdatum->level->sens ||
452 levdatum->level->sens > p->p_levels.nprim)
454 fa = p->sym_val_to_name[SYM_LEVELS];
455 if (flex_array_put_ptr(fa, levdatum->level->sens - 1, key,
456 GFP_KERNEL | __GFP_ZERO))
463 static int cat_index(void *key, void *datum, void *datap)
466 struct cat_datum *catdatum;
467 struct flex_array *fa;
472 if (!catdatum->isalias) {
473 if (!catdatum->value || catdatum->value > p->p_cats.nprim)
475 fa = p->sym_val_to_name[SYM_CATS];
476 if (flex_array_put_ptr(fa, catdatum->value - 1, key,
477 GFP_KERNEL | __GFP_ZERO))
484 static int (*index_f[SYM_NUM]) (void *key, void *datum, void *datap) =
497 static void hash_eval(struct hashtab *h, const char *hash_name)
499 struct hashtab_info info;
501 hashtab_stat(h, &info);
502 printk(KERN_DEBUG "SELinux: %s: %d entries and %d/%d buckets used, "
503 "longest chain length %d\n", hash_name, h->nel,
504 info.slots_used, h->size, info.max_chain_len);
507 static void symtab_hash_eval(struct symtab *s)
511 for (i = 0; i < SYM_NUM; i++)
512 hash_eval(s[i].table, symtab_name[i]);
516 static inline void hash_eval(struct hashtab *h, char *hash_name)
522 * Define the other val_to_name and val_to_struct arrays
523 * in a policy database structure.
525 * Caller must clean up on failure.
527 static int policydb_index(struct policydb *p)
531 printk(KERN_DEBUG "SELinux: %d users, %d roles, %d types, %d bools",
532 p->p_users.nprim, p->p_roles.nprim, p->p_types.nprim, p->p_bools.nprim);
534 printk(KERN_CONT ", %d sens, %d cats", p->p_levels.nprim,
536 printk(KERN_CONT "\n");
538 printk(KERN_DEBUG "SELinux: %d classes, %d rules\n",
539 p->p_classes.nprim, p->te_avtab.nel);
542 avtab_hash_eval(&p->te_avtab, "rules");
543 symtab_hash_eval(p->symtab);
547 p->class_val_to_struct =
548 kzalloc(p->p_classes.nprim * sizeof(*(p->class_val_to_struct)),
550 if (!p->class_val_to_struct)
554 p->role_val_to_struct =
555 kzalloc(p->p_roles.nprim * sizeof(*(p->role_val_to_struct)),
557 if (!p->role_val_to_struct)
561 p->user_val_to_struct =
562 kzalloc(p->p_users.nprim * sizeof(*(p->user_val_to_struct)),
564 if (!p->user_val_to_struct)
567 /* Yes, I want the sizeof the pointer, not the structure */
569 p->type_val_to_struct_array = flex_array_alloc(sizeof(struct type_datum *),
571 GFP_KERNEL | __GFP_ZERO);
572 if (!p->type_val_to_struct_array)
575 rc = flex_array_prealloc(p->type_val_to_struct_array, 0,
576 p->p_types.nprim, GFP_KERNEL | __GFP_ZERO);
580 rc = cond_init_bool_indexes(p);
584 for (i = 0; i < SYM_NUM; i++) {
586 p->sym_val_to_name[i] = flex_array_alloc(sizeof(char *),
588 GFP_KERNEL | __GFP_ZERO);
589 if (!p->sym_val_to_name[i])
592 rc = flex_array_prealloc(p->sym_val_to_name[i],
593 0, p->symtab[i].nprim,
594 GFP_KERNEL | __GFP_ZERO);
598 rc = hashtab_map(p->symtab[i].table, index_f[i], p);
608 * The following *_destroy functions are used to
609 * free any memory allocated for each kind of
610 * symbol data in the policy database.
613 static int perm_destroy(void *key, void *datum, void *p)
620 static int common_destroy(void *key, void *datum, void *p)
622 struct common_datum *comdatum;
627 hashtab_map(comdatum->permissions.table, perm_destroy, NULL);
628 hashtab_destroy(comdatum->permissions.table);
634 static void constraint_expr_destroy(struct constraint_expr *expr)
637 ebitmap_destroy(&expr->names);
638 if (expr->type_names) {
639 ebitmap_destroy(&expr->type_names->types);
640 ebitmap_destroy(&expr->type_names->negset);
641 kfree(expr->type_names);
647 static int cls_destroy(void *key, void *datum, void *p)
649 struct class_datum *cladatum;
650 struct constraint_node *constraint, *ctemp;
651 struct constraint_expr *e, *etmp;
656 hashtab_map(cladatum->permissions.table, perm_destroy, NULL);
657 hashtab_destroy(cladatum->permissions.table);
658 constraint = cladatum->constraints;
660 e = constraint->expr;
664 constraint_expr_destroy(etmp);
667 constraint = constraint->next;
671 constraint = cladatum->validatetrans;
673 e = constraint->expr;
677 constraint_expr_destroy(etmp);
680 constraint = constraint->next;
683 kfree(cladatum->comkey);
689 static int role_destroy(void *key, void *datum, void *p)
691 struct role_datum *role;
696 ebitmap_destroy(&role->dominates);
697 ebitmap_destroy(&role->types);
703 static int type_destroy(void *key, void *datum, void *p)
710 static int user_destroy(void *key, void *datum, void *p)
712 struct user_datum *usrdatum;
717 ebitmap_destroy(&usrdatum->roles);
718 ebitmap_destroy(&usrdatum->range.level[0].cat);
719 ebitmap_destroy(&usrdatum->range.level[1].cat);
720 ebitmap_destroy(&usrdatum->dfltlevel.cat);
726 static int sens_destroy(void *key, void *datum, void *p)
728 struct level_datum *levdatum;
734 ebitmap_destroy(&levdatum->level->cat);
735 kfree(levdatum->level);
741 static int cat_destroy(void *key, void *datum, void *p)
748 static int (*destroy_f[SYM_NUM]) (void *key, void *datum, void *datap) =
760 static int filenametr_destroy(void *key, void *datum, void *p)
762 struct filename_trans *ft = key;
770 static int range_tr_destroy(void *key, void *datum, void *p)
772 struct mls_range *rt = datum;
774 ebitmap_destroy(&rt->level[0].cat);
775 ebitmap_destroy(&rt->level[1].cat);
781 static void ocontext_destroy(struct ocontext *c, int i)
786 context_destroy(&c->context[0]);
787 context_destroy(&c->context[1]);
788 if (i == OCON_ISID || i == OCON_FS ||
789 i == OCON_NETIF || i == OCON_FSUSE)
795 * Free any memory allocated by a policy database structure.
797 void policydb_destroy(struct policydb *p)
799 struct ocontext *c, *ctmp;
800 struct genfs *g, *gtmp;
802 struct role_allow *ra, *lra = NULL;
803 struct role_trans *tr, *ltr = NULL;
805 for (i = 0; i < SYM_NUM; i++) {
807 hashtab_map(p->symtab[i].table, destroy_f[i], NULL);
808 hashtab_destroy(p->symtab[i].table);
811 for (i = 0; i < SYM_NUM; i++) {
812 if (p->sym_val_to_name[i])
813 flex_array_free(p->sym_val_to_name[i]);
816 kfree(p->class_val_to_struct);
817 kfree(p->role_val_to_struct);
818 kfree(p->user_val_to_struct);
819 if (p->type_val_to_struct_array)
820 flex_array_free(p->type_val_to_struct_array);
822 avtab_destroy(&p->te_avtab);
824 for (i = 0; i < OCON_NUM; i++) {
830 ocontext_destroy(ctmp, i);
832 p->ocontexts[i] = NULL;
843 ocontext_destroy(ctmp, OCON_FSUSE);
851 cond_policydb_destroy(p);
853 for (tr = p->role_tr; tr; tr = tr->next) {
860 for (ra = p->role_allow; ra; ra = ra->next) {
867 hashtab_map(p->filename_trans, filenametr_destroy, NULL);
868 hashtab_destroy(p->filename_trans);
870 hashtab_map(p->range_tr, range_tr_destroy, NULL);
871 hashtab_destroy(p->range_tr);
873 if (p->type_attr_map_array) {
874 for (i = 0; i < p->p_types.nprim; i++) {
877 e = flex_array_get(p->type_attr_map_array, i);
882 flex_array_free(p->type_attr_map_array);
885 ebitmap_destroy(&p->filename_trans_ttypes);
886 ebitmap_destroy(&p->policycaps);
887 ebitmap_destroy(&p->permissive_map);
893 * Load the initial SIDs specified in a policy database
894 * structure into a SID table.
896 int policydb_load_isids(struct policydb *p, struct sidtab *s)
898 struct ocontext *head, *c;
903 printk(KERN_ERR "SELinux: out of memory on SID table init\n");
907 head = p->ocontexts[OCON_ISID];
908 for (c = head; c; c = c->next) {
910 if (!c->context[0].user) {
911 printk(KERN_ERR "SELinux: SID %s was never defined.\n",
916 rc = sidtab_insert(s, c->sid[0], &c->context[0]);
918 printk(KERN_ERR "SELinux: unable to load initial SID %s.\n",
928 int policydb_class_isvalid(struct policydb *p, unsigned int class)
930 if (!class || class > p->p_classes.nprim)
935 int policydb_role_isvalid(struct policydb *p, unsigned int role)
937 if (!role || role > p->p_roles.nprim)
942 int policydb_type_isvalid(struct policydb *p, unsigned int type)
944 if (!type || type > p->p_types.nprim)
950 * Return 1 if the fields in the security context
951 * structure `c' are valid. Return 0 otherwise.
953 int policydb_context_isvalid(struct policydb *p, struct context *c)
955 struct role_datum *role;
956 struct user_datum *usrdatum;
958 if (!c->role || c->role > p->p_roles.nprim)
961 if (!c->user || c->user > p->p_users.nprim)
964 if (!c->type || c->type > p->p_types.nprim)
967 if (c->role != OBJECT_R_VAL) {
969 * Role must be authorized for the type.
971 role = p->role_val_to_struct[c->role - 1];
972 if (!role || !ebitmap_get_bit(&role->types, c->type - 1))
973 /* role may not be associated with type */
977 * User must be authorized for the role.
979 usrdatum = p->user_val_to_struct[c->user - 1];
983 if (!ebitmap_get_bit(&usrdatum->roles, c->role - 1))
984 /* user may not be associated with role */
988 if (!mls_context_isvalid(p, c))
995 * Read a MLS range structure from a policydb binary
996 * representation file.
998 static int mls_read_range_helper(struct mls_range *r, void *fp)
1004 rc = next_entry(buf, fp, sizeof(u32));
1009 items = le32_to_cpu(buf[0]);
1010 if (items > ARRAY_SIZE(buf)) {
1011 printk(KERN_ERR "SELinux: mls: range overflow\n");
1015 rc = next_entry(buf, fp, sizeof(u32) * items);
1017 printk(KERN_ERR "SELinux: mls: truncated range\n");
1021 r->level[0].sens = le32_to_cpu(buf[0]);
1023 r->level[1].sens = le32_to_cpu(buf[1]);
1025 r->level[1].sens = r->level[0].sens;
1027 rc = ebitmap_read(&r->level[0].cat, fp);
1029 printk(KERN_ERR "SELinux: mls: error reading low categories\n");
1033 rc = ebitmap_read(&r->level[1].cat, fp);
1035 printk(KERN_ERR "SELinux: mls: error reading high categories\n");
1039 rc = ebitmap_cpy(&r->level[1].cat, &r->level[0].cat);
1041 printk(KERN_ERR "SELinux: mls: out of memory\n");
1048 ebitmap_destroy(&r->level[0].cat);
1054 * Read and validate a security context structure
1055 * from a policydb binary representation file.
1057 static int context_read_and_validate(struct context *c,
1064 rc = next_entry(buf, fp, sizeof buf);
1066 printk(KERN_ERR "SELinux: context truncated\n");
1069 c->user = le32_to_cpu(buf[0]);
1070 c->role = le32_to_cpu(buf[1]);
1071 c->type = le32_to_cpu(buf[2]);
1072 if (p->policyvers >= POLICYDB_VERSION_MLS) {
1073 rc = mls_read_range_helper(&c->range, fp);
1075 printk(KERN_ERR "SELinux: error reading MLS range of context\n");
1081 if (!policydb_context_isvalid(p, c)) {
1082 printk(KERN_ERR "SELinux: invalid security context\n");
1092 * The following *_read functions are used to
1093 * read the symbol data from a policy database
1094 * binary representation file.
1097 static int str_read(char **strp, gfp_t flags, void *fp, u32 len)
1102 if ((len == 0) || (len == (u32)-1))
1105 str = kmalloc(len + 1, flags | __GFP_NOWARN);
1109 /* it's expected the caller should free the str */
1112 rc = next_entry(str, fp, len);
1120 static int perm_read(struct policydb *p, struct hashtab *h, void *fp)
1123 struct perm_datum *perdatum;
1129 perdatum = kzalloc(sizeof(*perdatum), GFP_KERNEL);
1133 rc = next_entry(buf, fp, sizeof buf);
1137 len = le32_to_cpu(buf[0]);
1138 perdatum->value = le32_to_cpu(buf[1]);
1140 rc = str_read(&key, GFP_KERNEL, fp, len);
1144 rc = hashtab_insert(h, key, perdatum);
1150 perm_destroy(key, perdatum, NULL);
1154 static int common_read(struct policydb *p, struct hashtab *h, void *fp)
1157 struct common_datum *comdatum;
1163 comdatum = kzalloc(sizeof(*comdatum), GFP_KERNEL);
1167 rc = next_entry(buf, fp, sizeof buf);
1171 len = le32_to_cpu(buf[0]);
1172 comdatum->value = le32_to_cpu(buf[1]);
1174 rc = symtab_init(&comdatum->permissions, PERM_SYMTAB_SIZE);
1177 comdatum->permissions.nprim = le32_to_cpu(buf[2]);
1178 nel = le32_to_cpu(buf[3]);
1180 rc = str_read(&key, GFP_KERNEL, fp, len);
1184 for (i = 0; i < nel; i++) {
1185 rc = perm_read(p, comdatum->permissions.table, fp);
1190 rc = hashtab_insert(h, key, comdatum);
1195 common_destroy(key, comdatum, NULL);
1199 static void type_set_init(struct type_set *t)
1201 ebitmap_init(&t->types);
1202 ebitmap_init(&t->negset);
1205 static int type_set_read(struct type_set *t, void *fp)
1210 if (ebitmap_read(&t->types, fp))
1212 if (ebitmap_read(&t->negset, fp))
1215 rc = next_entry(buf, fp, sizeof(u32));
1218 t->flags = le32_to_cpu(buf[0]);
1224 static int read_cons_helper(struct policydb *p,
1225 struct constraint_node **nodep,
1226 int ncons, int allowxtarget, void *fp)
1228 struct constraint_node *c, *lc;
1229 struct constraint_expr *e, *le;
1232 int rc, i, j, depth;
1235 for (i = 0; i < ncons; i++) {
1236 c = kzalloc(sizeof(*c), GFP_KERNEL);
1245 rc = next_entry(buf, fp, (sizeof(u32) * 2));
1248 c->permissions = le32_to_cpu(buf[0]);
1249 nexpr = le32_to_cpu(buf[1]);
1252 for (j = 0; j < nexpr; j++) {
1253 e = kzalloc(sizeof(*e), GFP_KERNEL);
1262 rc = next_entry(buf, fp, (sizeof(u32) * 3));
1265 e->expr_type = le32_to_cpu(buf[0]);
1266 e->attr = le32_to_cpu(buf[1]);
1267 e->op = le32_to_cpu(buf[2]);
1269 switch (e->expr_type) {
1281 if (depth == (CEXPR_MAXDEPTH - 1))
1286 if (!allowxtarget && (e->attr & CEXPR_XTARGET))
1288 if (depth == (CEXPR_MAXDEPTH - 1))
1291 rc = ebitmap_read(&e->names, fp);
1294 if (p->policyvers >=
1295 POLICYDB_VERSION_CONSTRAINT_NAMES) {
1296 e->type_names = kzalloc(sizeof
1301 type_set_init(e->type_names);
1302 rc = type_set_read(e->type_names, fp);
1320 static int class_read(struct policydb *p, struct hashtab *h, void *fp)
1323 struct class_datum *cladatum;
1325 u32 len, len2, ncons, nel;
1329 cladatum = kzalloc(sizeof(*cladatum), GFP_KERNEL);
1333 rc = next_entry(buf, fp, sizeof(u32)*6);
1337 len = le32_to_cpu(buf[0]);
1338 len2 = le32_to_cpu(buf[1]);
1339 cladatum->value = le32_to_cpu(buf[2]);
1341 rc = symtab_init(&cladatum->permissions, PERM_SYMTAB_SIZE);
1344 cladatum->permissions.nprim = le32_to_cpu(buf[3]);
1345 nel = le32_to_cpu(buf[4]);
1347 ncons = le32_to_cpu(buf[5]);
1349 rc = str_read(&key, GFP_KERNEL, fp, len);
1354 rc = str_read(&cladatum->comkey, GFP_KERNEL, fp, len2);
1359 cladatum->comdatum = hashtab_search(p->p_commons.table, cladatum->comkey);
1360 if (!cladatum->comdatum) {
1361 printk(KERN_ERR "SELinux: unknown common %s\n", cladatum->comkey);
1365 for (i = 0; i < nel; i++) {
1366 rc = perm_read(p, cladatum->permissions.table, fp);
1371 rc = read_cons_helper(p, &cladatum->constraints, ncons, 0, fp);
1375 if (p->policyvers >= POLICYDB_VERSION_VALIDATETRANS) {
1376 /* grab the validatetrans rules */
1377 rc = next_entry(buf, fp, sizeof(u32));
1380 ncons = le32_to_cpu(buf[0]);
1381 rc = read_cons_helper(p, &cladatum->validatetrans,
1387 if (p->policyvers >= POLICYDB_VERSION_NEW_OBJECT_DEFAULTS) {
1388 rc = next_entry(buf, fp, sizeof(u32) * 3);
1392 cladatum->default_user = le32_to_cpu(buf[0]);
1393 cladatum->default_role = le32_to_cpu(buf[1]);
1394 cladatum->default_range = le32_to_cpu(buf[2]);
1397 if (p->policyvers >= POLICYDB_VERSION_DEFAULT_TYPE) {
1398 rc = next_entry(buf, fp, sizeof(u32) * 1);
1401 cladatum->default_type = le32_to_cpu(buf[0]);
1404 rc = hashtab_insert(h, key, cladatum);
1410 cls_destroy(key, cladatum, NULL);
1414 static int role_read(struct policydb *p, struct hashtab *h, void *fp)
1417 struct role_datum *role;
1418 int rc, to_read = 2;
1423 role = kzalloc(sizeof(*role), GFP_KERNEL);
1427 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1430 rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1434 len = le32_to_cpu(buf[0]);
1435 role->value = le32_to_cpu(buf[1]);
1436 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1437 role->bounds = le32_to_cpu(buf[2]);
1439 rc = str_read(&key, GFP_KERNEL, fp, len);
1443 rc = ebitmap_read(&role->dominates, fp);
1447 rc = ebitmap_read(&role->types, fp);
1451 if (strcmp(key, OBJECT_R) == 0) {
1453 if (role->value != OBJECT_R_VAL) {
1454 printk(KERN_ERR "SELinux: Role %s has wrong value %d\n",
1455 OBJECT_R, role->value);
1462 rc = hashtab_insert(h, key, role);
1467 role_destroy(key, role, NULL);
1471 static int type_read(struct policydb *p, struct hashtab *h, void *fp)
1474 struct type_datum *typdatum;
1475 int rc, to_read = 3;
1480 typdatum = kzalloc(sizeof(*typdatum), GFP_KERNEL);
1484 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1487 rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1491 len = le32_to_cpu(buf[0]);
1492 typdatum->value = le32_to_cpu(buf[1]);
1493 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) {
1494 u32 prop = le32_to_cpu(buf[2]);
1496 if (prop & TYPEDATUM_PROPERTY_PRIMARY)
1497 typdatum->primary = 1;
1498 if (prop & TYPEDATUM_PROPERTY_ATTRIBUTE)
1499 typdatum->attribute = 1;
1501 typdatum->bounds = le32_to_cpu(buf[3]);
1503 typdatum->primary = le32_to_cpu(buf[2]);
1506 rc = str_read(&key, GFP_KERNEL, fp, len);
1510 rc = hashtab_insert(h, key, typdatum);
1515 type_destroy(key, typdatum, NULL);
1521 * Read a MLS level structure from a policydb binary
1522 * representation file.
1524 static int mls_read_level(struct mls_level *lp, void *fp)
1529 memset(lp, 0, sizeof(*lp));
1531 rc = next_entry(buf, fp, sizeof buf);
1533 printk(KERN_ERR "SELinux: mls: truncated level\n");
1536 lp->sens = le32_to_cpu(buf[0]);
1538 rc = ebitmap_read(&lp->cat, fp);
1540 printk(KERN_ERR "SELinux: mls: error reading level categories\n");
1546 static int user_read(struct policydb *p, struct hashtab *h, void *fp)
1549 struct user_datum *usrdatum;
1550 int rc, to_read = 2;
1555 usrdatum = kzalloc(sizeof(*usrdatum), GFP_KERNEL);
1559 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1562 rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1566 len = le32_to_cpu(buf[0]);
1567 usrdatum->value = le32_to_cpu(buf[1]);
1568 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1569 usrdatum->bounds = le32_to_cpu(buf[2]);
1571 rc = str_read(&key, GFP_KERNEL, fp, len);
1575 rc = ebitmap_read(&usrdatum->roles, fp);
1579 if (p->policyvers >= POLICYDB_VERSION_MLS) {
1580 rc = mls_read_range_helper(&usrdatum->range, fp);
1583 rc = mls_read_level(&usrdatum->dfltlevel, fp);
1588 rc = hashtab_insert(h, key, usrdatum);
1593 user_destroy(key, usrdatum, NULL);
1597 static int sens_read(struct policydb *p, struct hashtab *h, void *fp)
1600 struct level_datum *levdatum;
1606 levdatum = kzalloc(sizeof(*levdatum), GFP_ATOMIC);
1610 rc = next_entry(buf, fp, sizeof buf);
1614 len = le32_to_cpu(buf[0]);
1615 levdatum->isalias = le32_to_cpu(buf[1]);
1617 rc = str_read(&key, GFP_ATOMIC, fp, len);
1622 levdatum->level = kmalloc(sizeof(struct mls_level), GFP_ATOMIC);
1623 if (!levdatum->level)
1626 rc = mls_read_level(levdatum->level, fp);
1630 rc = hashtab_insert(h, key, levdatum);
1635 sens_destroy(key, levdatum, NULL);
1639 static int cat_read(struct policydb *p, struct hashtab *h, void *fp)
1642 struct cat_datum *catdatum;
1648 catdatum = kzalloc(sizeof(*catdatum), GFP_ATOMIC);
1652 rc = next_entry(buf, fp, sizeof buf);
1656 len = le32_to_cpu(buf[0]);
1657 catdatum->value = le32_to_cpu(buf[1]);
1658 catdatum->isalias = le32_to_cpu(buf[2]);
1660 rc = str_read(&key, GFP_ATOMIC, fp, len);
1664 rc = hashtab_insert(h, key, catdatum);
1669 cat_destroy(key, catdatum, NULL);
1673 static int (*read_f[SYM_NUM]) (struct policydb *p, struct hashtab *h, void *fp) =
1685 static int user_bounds_sanity_check(void *key, void *datum, void *datap)
1687 struct user_datum *upper, *user;
1688 struct policydb *p = datap;
1691 upper = user = datum;
1692 while (upper->bounds) {
1693 struct ebitmap_node *node;
1696 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1697 printk(KERN_ERR "SELinux: user %s: "
1698 "too deep or looped boundary",
1703 upper = p->user_val_to_struct[upper->bounds - 1];
1704 ebitmap_for_each_positive_bit(&user->roles, node, bit) {
1705 if (ebitmap_get_bit(&upper->roles, bit))
1709 "SELinux: boundary violated policy: "
1710 "user=%s role=%s bounds=%s\n",
1711 sym_name(p, SYM_USERS, user->value - 1),
1712 sym_name(p, SYM_ROLES, bit),
1713 sym_name(p, SYM_USERS, upper->value - 1));
1722 static int role_bounds_sanity_check(void *key, void *datum, void *datap)
1724 struct role_datum *upper, *role;
1725 struct policydb *p = datap;
1728 upper = role = datum;
1729 while (upper->bounds) {
1730 struct ebitmap_node *node;
1733 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1734 printk(KERN_ERR "SELinux: role %s: "
1735 "too deep or looped bounds\n",
1740 upper = p->role_val_to_struct[upper->bounds - 1];
1741 ebitmap_for_each_positive_bit(&role->types, node, bit) {
1742 if (ebitmap_get_bit(&upper->types, bit))
1746 "SELinux: boundary violated policy: "
1747 "role=%s type=%s bounds=%s\n",
1748 sym_name(p, SYM_ROLES, role->value - 1),
1749 sym_name(p, SYM_TYPES, bit),
1750 sym_name(p, SYM_ROLES, upper->value - 1));
1759 static int type_bounds_sanity_check(void *key, void *datum, void *datap)
1761 struct type_datum *upper;
1762 struct policydb *p = datap;
1766 while (upper->bounds) {
1767 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1768 printk(KERN_ERR "SELinux: type %s: "
1769 "too deep or looped boundary\n",
1774 upper = flex_array_get_ptr(p->type_val_to_struct_array,
1778 if (upper->attribute) {
1779 printk(KERN_ERR "SELinux: type %s: "
1780 "bounded by attribute %s",
1782 sym_name(p, SYM_TYPES, upper->value - 1));
1790 static int policydb_bounds_sanity_check(struct policydb *p)
1794 if (p->policyvers < POLICYDB_VERSION_BOUNDARY)
1797 rc = hashtab_map(p->p_users.table,
1798 user_bounds_sanity_check, p);
1802 rc = hashtab_map(p->p_roles.table,
1803 role_bounds_sanity_check, p);
1807 rc = hashtab_map(p->p_types.table,
1808 type_bounds_sanity_check, p);
1815 u16 string_to_security_class(struct policydb *p, const char *name)
1817 struct class_datum *cladatum;
1819 cladatum = hashtab_search(p->p_classes.table, name);
1823 return cladatum->value;
1826 u32 string_to_av_perm(struct policydb *p, u16 tclass, const char *name)
1828 struct class_datum *cladatum;
1829 struct perm_datum *perdatum = NULL;
1830 struct common_datum *comdatum;
1832 if (!tclass || tclass > p->p_classes.nprim)
1835 cladatum = p->class_val_to_struct[tclass-1];
1836 comdatum = cladatum->comdatum;
1838 perdatum = hashtab_search(comdatum->permissions.table,
1841 perdatum = hashtab_search(cladatum->permissions.table,
1846 return 1U << (perdatum->value-1);
1849 static int range_read(struct policydb *p, void *fp)
1851 struct range_trans *rt = NULL;
1852 struct mls_range *r = NULL;
1857 if (p->policyvers < POLICYDB_VERSION_MLS)
1860 rc = next_entry(buf, fp, sizeof(u32));
1864 nel = le32_to_cpu(buf[0]);
1865 for (i = 0; i < nel; i++) {
1867 rt = kzalloc(sizeof(*rt), GFP_KERNEL);
1871 rc = next_entry(buf, fp, (sizeof(u32) * 2));
1875 rt->source_type = le32_to_cpu(buf[0]);
1876 rt->target_type = le32_to_cpu(buf[1]);
1877 if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) {
1878 rc = next_entry(buf, fp, sizeof(u32));
1881 rt->target_class = le32_to_cpu(buf[0]);
1883 rt->target_class = p->process_class;
1886 if (!policydb_type_isvalid(p, rt->source_type) ||
1887 !policydb_type_isvalid(p, rt->target_type) ||
1888 !policydb_class_isvalid(p, rt->target_class))
1892 r = kzalloc(sizeof(*r), GFP_KERNEL);
1896 rc = mls_read_range_helper(r, fp);
1901 if (!mls_range_isvalid(p, r)) {
1902 printk(KERN_WARNING "SELinux: rangetrans: invalid range\n");
1906 rc = hashtab_insert(p->range_tr, rt, r);
1913 hash_eval(p->range_tr, "rangetr");
1921 static int filename_trans_read(struct policydb *p, void *fp)
1923 struct filename_trans *ft;
1924 struct filename_trans_datum *otype;
1930 if (p->policyvers < POLICYDB_VERSION_FILENAME_TRANS)
1933 rc = next_entry(buf, fp, sizeof(u32));
1936 nel = le32_to_cpu(buf[0]);
1938 for (i = 0; i < nel; i++) {
1944 ft = kzalloc(sizeof(*ft), GFP_KERNEL);
1949 otype = kmalloc(sizeof(*otype), GFP_KERNEL);
1953 /* length of the path component string */
1954 rc = next_entry(buf, fp, sizeof(u32));
1957 len = le32_to_cpu(buf[0]);
1959 /* path component string */
1960 rc = str_read(&name, GFP_KERNEL, fp, len);
1966 rc = next_entry(buf, fp, sizeof(u32) * 4);
1970 ft->stype = le32_to_cpu(buf[0]);
1971 ft->ttype = le32_to_cpu(buf[1]);
1972 ft->tclass = le32_to_cpu(buf[2]);
1974 otype->otype = le32_to_cpu(buf[3]);
1976 rc = ebitmap_set_bit(&p->filename_trans_ttypes, ft->ttype, 1);
1980 rc = hashtab_insert(p->filename_trans, ft, otype);
1983 * Do not return -EEXIST to the caller, or the system
1988 /* But free memory to avoid memory leak. */
1994 hash_eval(p->filename_trans, "filenametr");
2004 static int genfs_read(struct policydb *p, void *fp)
2007 u32 nel, nel2, len, len2;
2009 struct ocontext *l, *c;
2010 struct ocontext *newc = NULL;
2011 struct genfs *genfs_p, *genfs;
2012 struct genfs *newgenfs = NULL;
2014 rc = next_entry(buf, fp, sizeof(u32));
2017 nel = le32_to_cpu(buf[0]);
2019 for (i = 0; i < nel; i++) {
2020 rc = next_entry(buf, fp, sizeof(u32));
2023 len = le32_to_cpu(buf[0]);
2026 newgenfs = kzalloc(sizeof(*newgenfs), GFP_KERNEL);
2030 rc = str_read(&newgenfs->fstype, GFP_KERNEL, fp, len);
2034 for (genfs_p = NULL, genfs = p->genfs; genfs;
2035 genfs_p = genfs, genfs = genfs->next) {
2037 if (strcmp(newgenfs->fstype, genfs->fstype) == 0) {
2038 printk(KERN_ERR "SELinux: dup genfs fstype %s\n",
2042 if (strcmp(newgenfs->fstype, genfs->fstype) < 0)
2045 newgenfs->next = genfs;
2047 genfs_p->next = newgenfs;
2049 p->genfs = newgenfs;
2053 rc = next_entry(buf, fp, sizeof(u32));
2057 nel2 = le32_to_cpu(buf[0]);
2058 for (j = 0; j < nel2; j++) {
2059 rc = next_entry(buf, fp, sizeof(u32));
2062 len = le32_to_cpu(buf[0]);
2065 newc = kzalloc(sizeof(*newc), GFP_KERNEL);
2069 rc = str_read(&newc->u.name, GFP_KERNEL, fp, len);
2073 rc = next_entry(buf, fp, sizeof(u32));
2077 newc->v.sclass = le32_to_cpu(buf[0]);
2078 rc = context_read_and_validate(&newc->context[0], p, fp);
2082 for (l = NULL, c = genfs->head; c;
2083 l = c, c = c->next) {
2085 if (!strcmp(newc->u.name, c->u.name) &&
2086 (!c->v.sclass || !newc->v.sclass ||
2087 newc->v.sclass == c->v.sclass)) {
2088 printk(KERN_ERR "SELinux: dup genfs entry (%s,%s)\n",
2089 genfs->fstype, c->u.name);
2092 len = strlen(newc->u.name);
2093 len2 = strlen(c->u.name);
2109 kfree(newgenfs->fstype);
2111 ocontext_destroy(newc, OCON_FSUSE);
2116 static int ocontext_read(struct policydb *p, struct policydb_compat_info *info,
2122 struct ocontext *l, *c;
2125 for (i = 0; i < info->ocon_num; i++) {
2126 rc = next_entry(buf, fp, sizeof(u32));
2129 nel = le32_to_cpu(buf[0]);
2132 for (j = 0; j < nel; j++) {
2134 c = kzalloc(sizeof(*c), GFP_KERNEL);
2140 p->ocontexts[i] = c;
2145 rc = next_entry(buf, fp, sizeof(u32));
2149 c->sid[0] = le32_to_cpu(buf[0]);
2150 rc = context_read_and_validate(&c->context[0], p, fp);
2156 rc = next_entry(buf, fp, sizeof(u32));
2159 len = le32_to_cpu(buf[0]);
2161 rc = str_read(&c->u.name, GFP_KERNEL, fp, len);
2165 rc = context_read_and_validate(&c->context[0], p, fp);
2168 rc = context_read_and_validate(&c->context[1], p, fp);
2173 rc = next_entry(buf, fp, sizeof(u32)*3);
2176 c->u.port.protocol = le32_to_cpu(buf[0]);
2177 c->u.port.low_port = le32_to_cpu(buf[1]);
2178 c->u.port.high_port = le32_to_cpu(buf[2]);
2179 rc = context_read_and_validate(&c->context[0], p, fp);
2184 rc = next_entry(nodebuf, fp, sizeof(u32) * 2);
2187 c->u.node.addr = nodebuf[0]; /* network order */
2188 c->u.node.mask = nodebuf[1]; /* network order */
2189 rc = context_read_and_validate(&c->context[0], p, fp);
2194 rc = next_entry(buf, fp, sizeof(u32)*2);
2199 c->v.behavior = le32_to_cpu(buf[0]);
2200 /* Determined at runtime, not in policy DB. */
2201 if (c->v.behavior == SECURITY_FS_USE_MNTPOINT)
2203 if (c->v.behavior > SECURITY_FS_USE_MAX)
2206 len = le32_to_cpu(buf[1]);
2207 rc = str_read(&c->u.name, GFP_KERNEL, fp, len);
2211 rc = context_read_and_validate(&c->context[0], p, fp);
2218 rc = next_entry(nodebuf, fp, sizeof(u32) * 8);
2221 for (k = 0; k < 4; k++)
2222 c->u.node6.addr[k] = nodebuf[k];
2223 for (k = 0; k < 4; k++)
2224 c->u.node6.mask[k] = nodebuf[k+4];
2225 rc = context_read_and_validate(&c->context[0], p, fp);
2239 * Read the configuration data from a policy database binary
2240 * representation file into a policy database structure.
2242 int policydb_read(struct policydb *p, void *fp)
2244 struct role_allow *ra, *lra;
2245 struct role_trans *tr, *ltr;
2248 u32 len, nprim, nel;
2251 struct policydb_compat_info *info;
2253 rc = policydb_init(p);
2257 /* Read the magic number and string length. */
2258 rc = next_entry(buf, fp, sizeof(u32) * 2);
2263 if (le32_to_cpu(buf[0]) != POLICYDB_MAGIC) {
2264 printk(KERN_ERR "SELinux: policydb magic number 0x%x does "
2265 "not match expected magic number 0x%x\n",
2266 le32_to_cpu(buf[0]), POLICYDB_MAGIC);
2271 len = le32_to_cpu(buf[1]);
2272 if (len != strlen(POLICYDB_STRING)) {
2273 printk(KERN_ERR "SELinux: policydb string length %d does not "
2274 "match expected length %Zu\n",
2275 len, strlen(POLICYDB_STRING));
2280 policydb_str = kmalloc(len + 1, GFP_KERNEL);
2281 if (!policydb_str) {
2282 printk(KERN_ERR "SELinux: unable to allocate memory for policydb "
2283 "string of length %d\n", len);
2287 rc = next_entry(policydb_str, fp, len);
2289 printk(KERN_ERR "SELinux: truncated policydb string identifier\n");
2290 kfree(policydb_str);
2295 policydb_str[len] = '\0';
2296 if (strcmp(policydb_str, POLICYDB_STRING)) {
2297 printk(KERN_ERR "SELinux: policydb string %s does not match "
2298 "my string %s\n", policydb_str, POLICYDB_STRING);
2299 kfree(policydb_str);
2302 /* Done with policydb_str. */
2303 kfree(policydb_str);
2304 policydb_str = NULL;
2306 /* Read the version and table sizes. */
2307 rc = next_entry(buf, fp, sizeof(u32)*4);
2312 p->policyvers = le32_to_cpu(buf[0]);
2313 if (p->policyvers < POLICYDB_VERSION_MIN ||
2314 p->policyvers > POLICYDB_VERSION_MAX) {
2315 printk(KERN_ERR "SELinux: policydb version %d does not match "
2316 "my version range %d-%d\n",
2317 le32_to_cpu(buf[0]), POLICYDB_VERSION_MIN, POLICYDB_VERSION_MAX);
2321 if ((le32_to_cpu(buf[1]) & POLICYDB_CONFIG_MLS)) {
2325 if (p->policyvers < POLICYDB_VERSION_MLS) {
2326 printk(KERN_ERR "SELinux: security policydb version %d "
2327 "(MLS) not backwards compatible\n",
2332 p->reject_unknown = !!(le32_to_cpu(buf[1]) & REJECT_UNKNOWN);
2333 p->allow_unknown = !!(le32_to_cpu(buf[1]) & ALLOW_UNKNOWN);
2335 if (p->policyvers >= POLICYDB_VERSION_POLCAP) {
2336 rc = ebitmap_read(&p->policycaps, fp);
2341 if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE) {
2342 rc = ebitmap_read(&p->permissive_map, fp);
2348 info = policydb_lookup_compat(p->policyvers);
2350 printk(KERN_ERR "SELinux: unable to find policy compat info "
2351 "for version %d\n", p->policyvers);
2356 if (le32_to_cpu(buf[2]) != info->sym_num ||
2357 le32_to_cpu(buf[3]) != info->ocon_num) {
2358 printk(KERN_ERR "SELinux: policydb table sizes (%d,%d) do "
2359 "not match mine (%d,%d)\n", le32_to_cpu(buf[2]),
2360 le32_to_cpu(buf[3]),
2361 info->sym_num, info->ocon_num);
2365 for (i = 0; i < info->sym_num; i++) {
2366 rc = next_entry(buf, fp, sizeof(u32)*2);
2369 nprim = le32_to_cpu(buf[0]);
2370 nel = le32_to_cpu(buf[1]);
2371 for (j = 0; j < nel; j++) {
2372 rc = read_f[i](p, p->symtab[i].table, fp);
2377 p->symtab[i].nprim = nprim;
2381 p->process_class = string_to_security_class(p, "process");
2382 if (!p->process_class)
2385 rc = avtab_read(&p->te_avtab, fp, p);
2389 if (p->policyvers >= POLICYDB_VERSION_BOOL) {
2390 rc = cond_read_list(p, fp);
2395 rc = next_entry(buf, fp, sizeof(u32));
2398 nel = le32_to_cpu(buf[0]);
2400 for (i = 0; i < nel; i++) {
2402 tr = kzalloc(sizeof(*tr), GFP_KERNEL);
2409 rc = next_entry(buf, fp, sizeof(u32)*3);
2414 tr->role = le32_to_cpu(buf[0]);
2415 tr->type = le32_to_cpu(buf[1]);
2416 tr->new_role = le32_to_cpu(buf[2]);
2417 if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) {
2418 rc = next_entry(buf, fp, sizeof(u32));
2421 tr->tclass = le32_to_cpu(buf[0]);
2423 tr->tclass = p->process_class;
2426 if (!policydb_role_isvalid(p, tr->role) ||
2427 !policydb_type_isvalid(p, tr->type) ||
2428 !policydb_class_isvalid(p, tr->tclass) ||
2429 !policydb_role_isvalid(p, tr->new_role))
2434 rc = next_entry(buf, fp, sizeof(u32));
2437 nel = le32_to_cpu(buf[0]);
2439 for (i = 0; i < nel; i++) {
2441 ra = kzalloc(sizeof(*ra), GFP_KERNEL);
2448 rc = next_entry(buf, fp, sizeof(u32)*2);
2453 ra->role = le32_to_cpu(buf[0]);
2454 ra->new_role = le32_to_cpu(buf[1]);
2455 if (!policydb_role_isvalid(p, ra->role) ||
2456 !policydb_role_isvalid(p, ra->new_role))
2461 rc = filename_trans_read(p, fp);
2465 rc = policydb_index(p);
2470 p->process_trans_perms = string_to_av_perm(p, p->process_class, "transition");
2471 p->process_trans_perms |= string_to_av_perm(p, p->process_class, "dyntransition");
2472 if (!p->process_trans_perms)
2475 rc = ocontext_read(p, info, fp);
2479 rc = genfs_read(p, fp);
2483 rc = range_read(p, fp);
2488 p->type_attr_map_array = flex_array_alloc(sizeof(struct ebitmap),
2490 GFP_KERNEL | __GFP_ZERO);
2491 if (!p->type_attr_map_array)
2494 /* preallocate so we don't have to worry about the put ever failing */
2495 rc = flex_array_prealloc(p->type_attr_map_array, 0, p->p_types.nprim,
2496 GFP_KERNEL | __GFP_ZERO);
2500 for (i = 0; i < p->p_types.nprim; i++) {
2501 struct ebitmap *e = flex_array_get(p->type_attr_map_array, i);
2505 if (p->policyvers >= POLICYDB_VERSION_AVTAB) {
2506 rc = ebitmap_read(e, fp);
2510 /* add the type itself as the degenerate case */
2511 rc = ebitmap_set_bit(e, i, 1);
2516 rc = policydb_bounds_sanity_check(p);
2524 policydb_destroy(p);
2529 * Write a MLS level structure to a policydb binary
2530 * representation file.
2532 static int mls_write_level(struct mls_level *l, void *fp)
2537 buf[0] = cpu_to_le32(l->sens);
2538 rc = put_entry(buf, sizeof(u32), 1, fp);
2542 rc = ebitmap_write(&l->cat, fp);
2550 * Write a MLS range structure to a policydb binary
2551 * representation file.
2553 static int mls_write_range_helper(struct mls_range *r, void *fp)
2559 eq = mls_level_eq(&r->level[1], &r->level[0]);
2565 buf[0] = cpu_to_le32(items-1);
2566 buf[1] = cpu_to_le32(r->level[0].sens);
2568 buf[2] = cpu_to_le32(r->level[1].sens);
2570 BUG_ON(items > ARRAY_SIZE(buf));
2572 rc = put_entry(buf, sizeof(u32), items, fp);
2576 rc = ebitmap_write(&r->level[0].cat, fp);
2580 rc = ebitmap_write(&r->level[1].cat, fp);
2588 static int sens_write(void *vkey, void *datum, void *ptr)
2591 struct level_datum *levdatum = datum;
2592 struct policy_data *pd = ptr;
2599 buf[0] = cpu_to_le32(len);
2600 buf[1] = cpu_to_le32(levdatum->isalias);
2601 rc = put_entry(buf, sizeof(u32), 2, fp);
2605 rc = put_entry(key, 1, len, fp);
2609 rc = mls_write_level(levdatum->level, fp);
2616 static int cat_write(void *vkey, void *datum, void *ptr)
2619 struct cat_datum *catdatum = datum;
2620 struct policy_data *pd = ptr;
2627 buf[0] = cpu_to_le32(len);
2628 buf[1] = cpu_to_le32(catdatum->value);
2629 buf[2] = cpu_to_le32(catdatum->isalias);
2630 rc = put_entry(buf, sizeof(u32), 3, fp);
2634 rc = put_entry(key, 1, len, fp);
2641 static int role_trans_write(struct policydb *p, void *fp)
2643 struct role_trans *r = p->role_tr;
2644 struct role_trans *tr;
2650 for (tr = r; tr; tr = tr->next)
2652 buf[0] = cpu_to_le32(nel);
2653 rc = put_entry(buf, sizeof(u32), 1, fp);
2656 for (tr = r; tr; tr = tr->next) {
2657 buf[0] = cpu_to_le32(tr->role);
2658 buf[1] = cpu_to_le32(tr->type);
2659 buf[2] = cpu_to_le32(tr->new_role);
2660 rc = put_entry(buf, sizeof(u32), 3, fp);
2663 if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) {
2664 buf[0] = cpu_to_le32(tr->tclass);
2665 rc = put_entry(buf, sizeof(u32), 1, fp);
2674 static int role_allow_write(struct role_allow *r, void *fp)
2676 struct role_allow *ra;
2682 for (ra = r; ra; ra = ra->next)
2684 buf[0] = cpu_to_le32(nel);
2685 rc = put_entry(buf, sizeof(u32), 1, fp);
2688 for (ra = r; ra; ra = ra->next) {
2689 buf[0] = cpu_to_le32(ra->role);
2690 buf[1] = cpu_to_le32(ra->new_role);
2691 rc = put_entry(buf, sizeof(u32), 2, fp);
2699 * Write a security context structure
2700 * to a policydb binary representation file.
2702 static int context_write(struct policydb *p, struct context *c,
2708 buf[0] = cpu_to_le32(c->user);
2709 buf[1] = cpu_to_le32(c->role);
2710 buf[2] = cpu_to_le32(c->type);
2712 rc = put_entry(buf, sizeof(u32), 3, fp);
2716 rc = mls_write_range_helper(&c->range, fp);
2724 * The following *_write functions are used to
2725 * write the symbol data to a policy database
2726 * binary representation file.
2729 static int perm_write(void *vkey, void *datum, void *fp)
2732 struct perm_datum *perdatum = datum;
2738 buf[0] = cpu_to_le32(len);
2739 buf[1] = cpu_to_le32(perdatum->value);
2740 rc = put_entry(buf, sizeof(u32), 2, fp);
2744 rc = put_entry(key, 1, len, fp);
2751 static int common_write(void *vkey, void *datum, void *ptr)
2754 struct common_datum *comdatum = datum;
2755 struct policy_data *pd = ptr;
2762 buf[0] = cpu_to_le32(len);
2763 buf[1] = cpu_to_le32(comdatum->value);
2764 buf[2] = cpu_to_le32(comdatum->permissions.nprim);
2765 buf[3] = cpu_to_le32(comdatum->permissions.table->nel);
2766 rc = put_entry(buf, sizeof(u32), 4, fp);
2770 rc = put_entry(key, 1, len, fp);
2774 rc = hashtab_map(comdatum->permissions.table, perm_write, fp);
2781 static int type_set_write(struct type_set *t, void *fp)
2786 if (ebitmap_write(&t->types, fp))
2788 if (ebitmap_write(&t->negset, fp))
2791 buf[0] = cpu_to_le32(t->flags);
2792 rc = put_entry(buf, sizeof(u32), 1, fp);
2799 static int write_cons_helper(struct policydb *p, struct constraint_node *node,
2802 struct constraint_node *c;
2803 struct constraint_expr *e;
2808 for (c = node; c; c = c->next) {
2810 for (e = c->expr; e; e = e->next)
2812 buf[0] = cpu_to_le32(c->permissions);
2813 buf[1] = cpu_to_le32(nel);
2814 rc = put_entry(buf, sizeof(u32), 2, fp);
2817 for (e = c->expr; e; e = e->next) {
2818 buf[0] = cpu_to_le32(e->expr_type);
2819 buf[1] = cpu_to_le32(e->attr);
2820 buf[2] = cpu_to_le32(e->op);
2821 rc = put_entry(buf, sizeof(u32), 3, fp);
2825 switch (e->expr_type) {
2827 rc = ebitmap_write(&e->names, fp);
2830 if (p->policyvers >=
2831 POLICYDB_VERSION_CONSTRAINT_NAMES) {
2832 rc = type_set_write(e->type_names, fp);
2846 static int class_write(void *vkey, void *datum, void *ptr)
2849 struct class_datum *cladatum = datum;
2850 struct policy_data *pd = ptr;
2852 struct policydb *p = pd->p;
2853 struct constraint_node *c;
2860 if (cladatum->comkey)
2861 len2 = strlen(cladatum->comkey);
2866 for (c = cladatum->constraints; c; c = c->next)
2869 buf[0] = cpu_to_le32(len);
2870 buf[1] = cpu_to_le32(len2);
2871 buf[2] = cpu_to_le32(cladatum->value);
2872 buf[3] = cpu_to_le32(cladatum->permissions.nprim);
2873 if (cladatum->permissions.table)
2874 buf[4] = cpu_to_le32(cladatum->permissions.table->nel);
2877 buf[5] = cpu_to_le32(ncons);
2878 rc = put_entry(buf, sizeof(u32), 6, fp);
2882 rc = put_entry(key, 1, len, fp);
2886 if (cladatum->comkey) {
2887 rc = put_entry(cladatum->comkey, 1, len2, fp);
2892 rc = hashtab_map(cladatum->permissions.table, perm_write, fp);
2896 rc = write_cons_helper(p, cladatum->constraints, fp);
2900 /* write out the validatetrans rule */
2902 for (c = cladatum->validatetrans; c; c = c->next)
2905 buf[0] = cpu_to_le32(ncons);
2906 rc = put_entry(buf, sizeof(u32), 1, fp);
2910 rc = write_cons_helper(p, cladatum->validatetrans, fp);
2914 if (p->policyvers >= POLICYDB_VERSION_NEW_OBJECT_DEFAULTS) {
2915 buf[0] = cpu_to_le32(cladatum->default_user);
2916 buf[1] = cpu_to_le32(cladatum->default_role);
2917 buf[2] = cpu_to_le32(cladatum->default_range);
2919 rc = put_entry(buf, sizeof(uint32_t), 3, fp);
2924 if (p->policyvers >= POLICYDB_VERSION_DEFAULT_TYPE) {
2925 buf[0] = cpu_to_le32(cladatum->default_type);
2926 rc = put_entry(buf, sizeof(uint32_t), 1, fp);
2934 static int role_write(void *vkey, void *datum, void *ptr)
2937 struct role_datum *role = datum;
2938 struct policy_data *pd = ptr;
2940 struct policydb *p = pd->p;
2947 buf[items++] = cpu_to_le32(len);
2948 buf[items++] = cpu_to_le32(role->value);
2949 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
2950 buf[items++] = cpu_to_le32(role->bounds);
2952 BUG_ON(items > ARRAY_SIZE(buf));
2954 rc = put_entry(buf, sizeof(u32), items, fp);
2958 rc = put_entry(key, 1, len, fp);
2962 rc = ebitmap_write(&role->dominates, fp);
2966 rc = ebitmap_write(&role->types, fp);
2973 static int type_write(void *vkey, void *datum, void *ptr)
2976 struct type_datum *typdatum = datum;
2977 struct policy_data *pd = ptr;
2978 struct policydb *p = pd->p;
2986 buf[items++] = cpu_to_le32(len);
2987 buf[items++] = cpu_to_le32(typdatum->value);
2988 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) {
2991 if (typdatum->primary)
2992 properties |= TYPEDATUM_PROPERTY_PRIMARY;
2994 if (typdatum->attribute)
2995 properties |= TYPEDATUM_PROPERTY_ATTRIBUTE;
2997 buf[items++] = cpu_to_le32(properties);
2998 buf[items++] = cpu_to_le32(typdatum->bounds);
3000 buf[items++] = cpu_to_le32(typdatum->primary);
3002 BUG_ON(items > ARRAY_SIZE(buf));
3003 rc = put_entry(buf, sizeof(u32), items, fp);
3007 rc = put_entry(key, 1, len, fp);
3014 static int user_write(void *vkey, void *datum, void *ptr)
3017 struct user_datum *usrdatum = datum;
3018 struct policy_data *pd = ptr;
3019 struct policydb *p = pd->p;
3027 buf[items++] = cpu_to_le32(len);
3028 buf[items++] = cpu_to_le32(usrdatum->value);
3029 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
3030 buf[items++] = cpu_to_le32(usrdatum->bounds);
3031 BUG_ON(items > ARRAY_SIZE(buf));
3032 rc = put_entry(buf, sizeof(u32), items, fp);
3036 rc = put_entry(key, 1, len, fp);
3040 rc = ebitmap_write(&usrdatum->roles, fp);
3044 rc = mls_write_range_helper(&usrdatum->range, fp);
3048 rc = mls_write_level(&usrdatum->dfltlevel, fp);
3055 static int (*write_f[SYM_NUM]) (void *key, void *datum,
3068 static int ocontext_write(struct policydb *p, struct policydb_compat_info *info,
3071 unsigned int i, j, rc;
3076 for (i = 0; i < info->ocon_num; i++) {
3078 for (c = p->ocontexts[i]; c; c = c->next)
3080 buf[0] = cpu_to_le32(nel);
3081 rc = put_entry(buf, sizeof(u32), 1, fp);
3084 for (c = p->ocontexts[i]; c; c = c->next) {
3087 buf[0] = cpu_to_le32(c->sid[0]);
3088 rc = put_entry(buf, sizeof(u32), 1, fp);
3091 rc = context_write(p, &c->context[0], fp);
3097 len = strlen(c->u.name);
3098 buf[0] = cpu_to_le32(len);
3099 rc = put_entry(buf, sizeof(u32), 1, fp);
3102 rc = put_entry(c->u.name, 1, len, fp);
3105 rc = context_write(p, &c->context[0], fp);
3108 rc = context_write(p, &c->context[1], fp);
3113 buf[0] = cpu_to_le32(c->u.port.protocol);
3114 buf[1] = cpu_to_le32(c->u.port.low_port);
3115 buf[2] = cpu_to_le32(c->u.port.high_port);
3116 rc = put_entry(buf, sizeof(u32), 3, fp);
3119 rc = context_write(p, &c->context[0], fp);
3124 nodebuf[0] = c->u.node.addr; /* network order */
3125 nodebuf[1] = c->u.node.mask; /* network order */
3126 rc = put_entry(nodebuf, sizeof(u32), 2, fp);
3129 rc = context_write(p, &c->context[0], fp);
3134 buf[0] = cpu_to_le32(c->v.behavior);
3135 len = strlen(c->u.name);
3136 buf[1] = cpu_to_le32(len);
3137 rc = put_entry(buf, sizeof(u32), 2, fp);
3140 rc = put_entry(c->u.name, 1, len, fp);
3143 rc = context_write(p, &c->context[0], fp);
3148 for (j = 0; j < 4; j++)
3149 nodebuf[j] = c->u.node6.addr[j]; /* network order */
3150 for (j = 0; j < 4; j++)
3151 nodebuf[j + 4] = c->u.node6.mask[j]; /* network order */
3152 rc = put_entry(nodebuf, sizeof(u32), 8, fp);
3155 rc = context_write(p, &c->context[0], fp);
3165 static int genfs_write(struct policydb *p, void *fp)
3167 struct genfs *genfs;
3174 for (genfs = p->genfs; genfs; genfs = genfs->next)
3176 buf[0] = cpu_to_le32(len);
3177 rc = put_entry(buf, sizeof(u32), 1, fp);
3180 for (genfs = p->genfs; genfs; genfs = genfs->next) {
3181 len = strlen(genfs->fstype);
3182 buf[0] = cpu_to_le32(len);
3183 rc = put_entry(buf, sizeof(u32), 1, fp);
3186 rc = put_entry(genfs->fstype, 1, len, fp);
3190 for (c = genfs->head; c; c = c->next)
3192 buf[0] = cpu_to_le32(len);
3193 rc = put_entry(buf, sizeof(u32), 1, fp);
3196 for (c = genfs->head; c; c = c->next) {
3197 len = strlen(c->u.name);
3198 buf[0] = cpu_to_le32(len);
3199 rc = put_entry(buf, sizeof(u32), 1, fp);
3202 rc = put_entry(c->u.name, 1, len, fp);
3205 buf[0] = cpu_to_le32(c->v.sclass);
3206 rc = put_entry(buf, sizeof(u32), 1, fp);
3209 rc = context_write(p, &c->context[0], fp);
3217 static int hashtab_cnt(void *key, void *data, void *ptr)
3225 static int range_write_helper(void *key, void *data, void *ptr)
3228 struct range_trans *rt = key;
3229 struct mls_range *r = data;
3230 struct policy_data *pd = ptr;
3232 struct policydb *p = pd->p;
3235 buf[0] = cpu_to_le32(rt->source_type);
3236 buf[1] = cpu_to_le32(rt->target_type);
3237 rc = put_entry(buf, sizeof(u32), 2, fp);
3240 if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) {
3241 buf[0] = cpu_to_le32(rt->target_class);
3242 rc = put_entry(buf, sizeof(u32), 1, fp);
3246 rc = mls_write_range_helper(r, fp);
3253 static int range_write(struct policydb *p, void *fp)
3257 struct policy_data pd;
3262 /* count the number of entries in the hashtab */
3264 rc = hashtab_map(p->range_tr, hashtab_cnt, &nel);
3268 buf[0] = cpu_to_le32(nel);
3269 rc = put_entry(buf, sizeof(u32), 1, fp);
3273 /* actually write all of the entries */
3274 rc = hashtab_map(p->range_tr, range_write_helper, &pd);
3281 static int filename_write_helper(void *key, void *data, void *ptr)
3284 struct filename_trans *ft = key;
3285 struct filename_trans_datum *otype = data;
3290 len = strlen(ft->name);
3291 buf[0] = cpu_to_le32(len);
3292 rc = put_entry(buf, sizeof(u32), 1, fp);
3296 rc = put_entry(ft->name, sizeof(char), len, fp);
3300 buf[0] = cpu_to_le32(ft->stype);
3301 buf[1] = cpu_to_le32(ft->ttype);
3302 buf[2] = cpu_to_le32(ft->tclass);
3303 buf[3] = cpu_to_le32(otype->otype);
3305 rc = put_entry(buf, sizeof(u32), 4, fp);
3312 static int filename_trans_write(struct policydb *p, void *fp)
3318 if (p->policyvers < POLICYDB_VERSION_FILENAME_TRANS)
3322 rc = hashtab_map(p->filename_trans, hashtab_cnt, &nel);
3326 buf[0] = cpu_to_le32(nel);
3327 rc = put_entry(buf, sizeof(u32), 1, fp);
3331 rc = hashtab_map(p->filename_trans, filename_write_helper, fp);
3339 * Write the configuration data in a policy database
3340 * structure to a policy database binary representation
3343 int policydb_write(struct policydb *p, void *fp)
3345 unsigned int i, num_syms;
3350 struct policydb_compat_info *info;
3353 * refuse to write policy older than compressed avtab
3354 * to simplify the writer. There are other tests dropped
3355 * since we assume this throughout the writer code. Be
3356 * careful if you ever try to remove this restriction
3358 if (p->policyvers < POLICYDB_VERSION_AVTAB) {
3359 printk(KERN_ERR "SELinux: refusing to write policy version %d."
3360 " Because it is less than version %d\n", p->policyvers,
3361 POLICYDB_VERSION_AVTAB);
3367 config |= POLICYDB_CONFIG_MLS;
3369 if (p->reject_unknown)
3370 config |= REJECT_UNKNOWN;
3371 if (p->allow_unknown)
3372 config |= ALLOW_UNKNOWN;
3374 /* Write the magic number and string identifiers. */
3375 buf[0] = cpu_to_le32(POLICYDB_MAGIC);
3376 len = strlen(POLICYDB_STRING);
3377 buf[1] = cpu_to_le32(len);
3378 rc = put_entry(buf, sizeof(u32), 2, fp);
3381 rc = put_entry(POLICYDB_STRING, 1, len, fp);
3385 /* Write the version, config, and table sizes. */
3386 info = policydb_lookup_compat(p->policyvers);
3388 printk(KERN_ERR "SELinux: compatibility lookup failed for policy "
3389 "version %d", p->policyvers);
3393 buf[0] = cpu_to_le32(p->policyvers);
3394 buf[1] = cpu_to_le32(config);
3395 buf[2] = cpu_to_le32(info->sym_num);
3396 buf[3] = cpu_to_le32(info->ocon_num);
3398 rc = put_entry(buf, sizeof(u32), 4, fp);
3402 if (p->policyvers >= POLICYDB_VERSION_POLCAP) {
3403 rc = ebitmap_write(&p->policycaps, fp);
3408 if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE) {
3409 rc = ebitmap_write(&p->permissive_map, fp);
3414 num_syms = info->sym_num;
3415 for (i = 0; i < num_syms; i++) {
3416 struct policy_data pd;
3421 buf[0] = cpu_to_le32(p->symtab[i].nprim);
3422 buf[1] = cpu_to_le32(p->symtab[i].table->nel);
3424 rc = put_entry(buf, sizeof(u32), 2, fp);
3427 rc = hashtab_map(p->symtab[i].table, write_f[i], &pd);
3432 rc = avtab_write(p, &p->te_avtab, fp);
3436 rc = cond_write_list(p, p->cond_list, fp);
3440 rc = role_trans_write(p, fp);
3444 rc = role_allow_write(p->role_allow, fp);
3448 rc = filename_trans_write(p, fp);
3452 rc = ocontext_write(p, info, fp);
3456 rc = genfs_write(p, fp);
3460 rc = range_write(p, fp);
3464 for (i = 0; i < p->p_types.nprim; i++) {
3465 struct ebitmap *e = flex_array_get(p->type_attr_map_array, i);
3468 rc = ebitmap_write(e, fp);