1 // SPDX-License-Identifier: GPL-2.0-only
3 * Implementation of the policy database.
5 * Author : Stephen Smalley, <sds@tycho.nsa.gov>
9 * Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com>
11 * Support for enhanced MLS infrastructure.
13 * Updated: Frank Mayer <mayerf@tresys.com> and Karl MacMillan <kmacmillan@tresys.com>
15 * Added conditional policy language extensions
17 * Updated: Hewlett-Packard <paul@paul-moore.com>
19 * Added support for the policy capability bitmap
21 * Update: Mellanox Techonologies
23 * Added Infiniband support
25 * Copyright (C) 2016 Mellanox Techonologies
26 * Copyright (C) 2007 Hewlett-Packard Development Company, L.P.
27 * Copyright (C) 2004-2005 Trusted Computer Solutions, Inc.
28 * Copyright (C) 2003 - 2004 Tresys Technology, LLC
31 #include <linux/kernel.h>
32 #include <linux/sched.h>
33 #include <linux/slab.h>
34 #include <linux/string.h>
35 #include <linux/errno.h>
36 #include <linux/audit.h>
40 #include "conditional.h"
47 static const char *symtab_name[SYM_NUM] = {
59 static unsigned int symtab_sizes[SYM_NUM] = {
70 struct policydb_compat_info {
76 /* These need to be updated if SYM_NUM or OCON_NUM changes */
77 static struct policydb_compat_info policydb_compat[] = {
79 .version = POLICYDB_VERSION_BASE,
80 .sym_num = SYM_NUM - 3,
81 .ocon_num = OCON_NUM - 3,
84 .version = POLICYDB_VERSION_BOOL,
85 .sym_num = SYM_NUM - 2,
86 .ocon_num = OCON_NUM - 3,
89 .version = POLICYDB_VERSION_IPV6,
90 .sym_num = SYM_NUM - 2,
91 .ocon_num = OCON_NUM - 2,
94 .version = POLICYDB_VERSION_NLCLASS,
95 .sym_num = SYM_NUM - 2,
96 .ocon_num = OCON_NUM - 2,
99 .version = POLICYDB_VERSION_MLS,
101 .ocon_num = OCON_NUM - 2,
104 .version = POLICYDB_VERSION_AVTAB,
106 .ocon_num = OCON_NUM - 2,
109 .version = POLICYDB_VERSION_RANGETRANS,
111 .ocon_num = OCON_NUM - 2,
114 .version = POLICYDB_VERSION_POLCAP,
116 .ocon_num = OCON_NUM - 2,
119 .version = POLICYDB_VERSION_PERMISSIVE,
121 .ocon_num = OCON_NUM - 2,
124 .version = POLICYDB_VERSION_BOUNDARY,
126 .ocon_num = OCON_NUM - 2,
129 .version = POLICYDB_VERSION_FILENAME_TRANS,
131 .ocon_num = OCON_NUM - 2,
134 .version = POLICYDB_VERSION_ROLETRANS,
136 .ocon_num = OCON_NUM - 2,
139 .version = POLICYDB_VERSION_NEW_OBJECT_DEFAULTS,
141 .ocon_num = OCON_NUM - 2,
144 .version = POLICYDB_VERSION_DEFAULT_TYPE,
146 .ocon_num = OCON_NUM - 2,
149 .version = POLICYDB_VERSION_CONSTRAINT_NAMES,
151 .ocon_num = OCON_NUM - 2,
154 .version = POLICYDB_VERSION_XPERMS_IOCTL,
156 .ocon_num = OCON_NUM - 2,
159 .version = POLICYDB_VERSION_INFINIBAND,
161 .ocon_num = OCON_NUM,
165 static struct policydb_compat_info *policydb_lookup_compat(int version)
168 struct policydb_compat_info *info = NULL;
170 for (i = 0; i < ARRAY_SIZE(policydb_compat); i++) {
171 if (policydb_compat[i].version == version) {
172 info = &policydb_compat[i];
180 * Initialize the role table.
182 static int roles_init(struct policydb *p)
186 struct role_datum *role;
188 role = kzalloc(sizeof(*role), GFP_KERNEL);
193 role->value = ++p->p_roles.nprim;
194 if (role->value != OBJECT_R_VAL)
198 key = kstrdup(OBJECT_R, GFP_KERNEL);
202 rc = hashtab_insert(p->p_roles.table, key, role);
213 static u32 filenametr_hash(struct hashtab *h, const void *k)
215 const struct filename_trans *ft = k;
217 unsigned int byte_num;
220 hash = ft->stype ^ ft->ttype ^ ft->tclass;
223 while ((focus = ft->name[byte_num++]))
224 hash = partial_name_hash(focus, hash);
225 return hash & (h->size - 1);
228 static int filenametr_cmp(struct hashtab *h, const void *k1, const void *k2)
230 const struct filename_trans *ft1 = k1;
231 const struct filename_trans *ft2 = k2;
234 v = ft1->stype - ft2->stype;
238 v = ft1->ttype - ft2->ttype;
242 v = ft1->tclass - ft2->tclass;
246 return strcmp(ft1->name, ft2->name);
250 static u32 rangetr_hash(struct hashtab *h, const void *k)
252 const struct range_trans *key = k;
253 return (key->source_type + (key->target_type << 3) +
254 (key->target_class << 5)) & (h->size - 1);
257 static int rangetr_cmp(struct hashtab *h, const void *k1, const void *k2)
259 const struct range_trans *key1 = k1, *key2 = k2;
262 v = key1->source_type - key2->source_type;
266 v = key1->target_type - key2->target_type;
270 v = key1->target_class - key2->target_class;
275 static int (*destroy_f[SYM_NUM]) (void *key, void *datum, void *datap);
278 * Initialize a policy database structure.
280 static int policydb_init(struct policydb *p)
284 memset(p, 0, sizeof(*p));
286 for (i = 0; i < SYM_NUM; i++) {
287 rc = symtab_init(&p->symtab[i], symtab_sizes[i]);
292 rc = avtab_init(&p->te_avtab);
300 rc = cond_policydb_init(p);
304 p->filename_trans = hashtab_create(filenametr_hash, filenametr_cmp, (1 << 10));
305 if (!p->filename_trans) {
310 p->range_tr = hashtab_create(rangetr_hash, rangetr_cmp, 256);
316 ebitmap_init(&p->filename_trans_ttypes);
317 ebitmap_init(&p->policycaps);
318 ebitmap_init(&p->permissive_map);
322 hashtab_destroy(p->filename_trans);
323 hashtab_destroy(p->range_tr);
324 for (i = 0; i < SYM_NUM; i++) {
325 hashtab_map(p->symtab[i].table, destroy_f[i], NULL);
326 hashtab_destroy(p->symtab[i].table);
332 * The following *_index functions are used to
333 * define the val_to_name and val_to_struct arrays
334 * in a policy database structure. The val_to_name
335 * arrays are used when converting security context
336 * structures into string representations. The
337 * val_to_struct arrays are used when the attributes
338 * of a class, role, or user are needed.
341 static int common_index(void *key, void *datum, void *datap)
344 struct common_datum *comdatum;
348 if (!comdatum->value || comdatum->value > p->p_commons.nprim)
351 p->sym_val_to_name[SYM_COMMONS][comdatum->value - 1] = key;
356 static int class_index(void *key, void *datum, void *datap)
359 struct class_datum *cladatum;
363 if (!cladatum->value || cladatum->value > p->p_classes.nprim)
366 p->sym_val_to_name[SYM_CLASSES][cladatum->value - 1] = key;
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;
379 || role->value > p->p_roles.nprim
380 || role->bounds > p->p_roles.nprim)
383 p->sym_val_to_name[SYM_ROLES][role->value - 1] = key;
384 p->role_val_to_struct[role->value - 1] = role;
388 static int type_index(void *key, void *datum, void *datap)
391 struct type_datum *typdatum;
396 if (typdatum->primary) {
398 || typdatum->value > p->p_types.nprim
399 || typdatum->bounds > p->p_types.nprim)
401 p->sym_val_to_name[SYM_TYPES][typdatum->value - 1] = key;
402 p->type_val_to_struct_array[typdatum->value - 1] = typdatum;
408 static int user_index(void *key, void *datum, void *datap)
411 struct user_datum *usrdatum;
416 || usrdatum->value > p->p_users.nprim
417 || usrdatum->bounds > p->p_users.nprim)
420 p->sym_val_to_name[SYM_USERS][usrdatum->value - 1] = key;
421 p->user_val_to_struct[usrdatum->value - 1] = usrdatum;
425 static int sens_index(void *key, void *datum, void *datap)
428 struct level_datum *levdatum;
433 if (!levdatum->isalias) {
434 if (!levdatum->level->sens ||
435 levdatum->level->sens > p->p_levels.nprim)
438 p->sym_val_to_name[SYM_LEVELS][levdatum->level->sens - 1] = key;
444 static int cat_index(void *key, void *datum, void *datap)
447 struct cat_datum *catdatum;
452 if (!catdatum->isalias) {
453 if (!catdatum->value || catdatum->value > p->p_cats.nprim)
456 p->sym_val_to_name[SYM_CATS][catdatum->value - 1] = key;
462 static int (*index_f[SYM_NUM]) (void *key, void *datum, void *datap) =
475 static void hash_eval(struct hashtab *h, const char *hash_name)
477 struct hashtab_info info;
479 hashtab_stat(h, &info);
480 pr_debug("SELinux: %s: %d entries and %d/%d buckets used, "
481 "longest chain length %d\n", hash_name, h->nel,
482 info.slots_used, h->size, info.max_chain_len);
485 static void symtab_hash_eval(struct symtab *s)
489 for (i = 0; i < SYM_NUM; i++)
490 hash_eval(s[i].table, symtab_name[i]);
494 static inline void hash_eval(struct hashtab *h, char *hash_name)
500 * Define the other val_to_name and val_to_struct arrays
501 * in a policy database structure.
503 * Caller must clean up on failure.
505 static int policydb_index(struct policydb *p)
510 pr_debug("SELinux: %d users, %d roles, %d types, %d bools, %d sens, %d cats\n",
511 p->p_users.nprim, p->p_roles.nprim, p->p_types.nprim,
512 p->p_bools.nprim, p->p_levels.nprim, p->p_cats.nprim);
514 pr_debug("SELinux: %d users, %d roles, %d types, %d bools\n",
515 p->p_users.nprim, p->p_roles.nprim, p->p_types.nprim,
518 pr_debug("SELinux: %d classes, %d rules\n",
519 p->p_classes.nprim, p->te_avtab.nel);
522 avtab_hash_eval(&p->te_avtab, "rules");
523 symtab_hash_eval(p->symtab);
526 p->class_val_to_struct = kcalloc(p->p_classes.nprim,
527 sizeof(*p->class_val_to_struct),
529 if (!p->class_val_to_struct)
532 p->role_val_to_struct = kcalloc(p->p_roles.nprim,
533 sizeof(*p->role_val_to_struct),
535 if (!p->role_val_to_struct)
538 p->user_val_to_struct = kcalloc(p->p_users.nprim,
539 sizeof(*p->user_val_to_struct),
541 if (!p->user_val_to_struct)
544 p->type_val_to_struct_array = kvcalloc(p->p_types.nprim,
545 sizeof(*p->type_val_to_struct_array),
547 if (!p->type_val_to_struct_array)
550 rc = cond_init_bool_indexes(p);
554 for (i = 0; i < SYM_NUM; i++) {
555 p->sym_val_to_name[i] = kvcalloc(p->symtab[i].nprim,
558 if (!p->sym_val_to_name[i])
561 rc = hashtab_map(p->symtab[i].table, index_f[i], p);
571 * The following *_destroy functions are used to
572 * free any memory allocated for each kind of
573 * symbol data in the policy database.
576 static int perm_destroy(void *key, void *datum, void *p)
583 static int common_destroy(void *key, void *datum, void *p)
585 struct common_datum *comdatum;
590 hashtab_map(comdatum->permissions.table, perm_destroy, NULL);
591 hashtab_destroy(comdatum->permissions.table);
597 static void constraint_expr_destroy(struct constraint_expr *expr)
600 ebitmap_destroy(&expr->names);
601 if (expr->type_names) {
602 ebitmap_destroy(&expr->type_names->types);
603 ebitmap_destroy(&expr->type_names->negset);
604 kfree(expr->type_names);
610 static int cls_destroy(void *key, void *datum, void *p)
612 struct class_datum *cladatum;
613 struct constraint_node *constraint, *ctemp;
614 struct constraint_expr *e, *etmp;
619 hashtab_map(cladatum->permissions.table, perm_destroy, NULL);
620 hashtab_destroy(cladatum->permissions.table);
621 constraint = cladatum->constraints;
623 e = constraint->expr;
627 constraint_expr_destroy(etmp);
630 constraint = constraint->next;
634 constraint = cladatum->validatetrans;
636 e = constraint->expr;
640 constraint_expr_destroy(etmp);
643 constraint = constraint->next;
646 kfree(cladatum->comkey);
652 static int role_destroy(void *key, void *datum, void *p)
654 struct role_datum *role;
659 ebitmap_destroy(&role->dominates);
660 ebitmap_destroy(&role->types);
666 static int type_destroy(void *key, void *datum, void *p)
673 static int user_destroy(void *key, void *datum, void *p)
675 struct user_datum *usrdatum;
680 ebitmap_destroy(&usrdatum->roles);
681 ebitmap_destroy(&usrdatum->range.level[0].cat);
682 ebitmap_destroy(&usrdatum->range.level[1].cat);
683 ebitmap_destroy(&usrdatum->dfltlevel.cat);
689 static int sens_destroy(void *key, void *datum, void *p)
691 struct level_datum *levdatum;
697 ebitmap_destroy(&levdatum->level->cat);
698 kfree(levdatum->level);
704 static int cat_destroy(void *key, void *datum, void *p)
711 static int (*destroy_f[SYM_NUM]) (void *key, void *datum, void *datap) =
723 static int filenametr_destroy(void *key, void *datum, void *p)
725 struct filename_trans *ft = key;
733 static int range_tr_destroy(void *key, void *datum, void *p)
735 struct mls_range *rt = datum;
737 ebitmap_destroy(&rt->level[0].cat);
738 ebitmap_destroy(&rt->level[1].cat);
744 static void ocontext_destroy(struct ocontext *c, int i)
749 context_destroy(&c->context[0]);
750 context_destroy(&c->context[1]);
751 if (i == OCON_ISID || i == OCON_FS ||
752 i == OCON_NETIF || i == OCON_FSUSE)
758 * Free any memory allocated by a policy database structure.
760 void policydb_destroy(struct policydb *p)
762 struct ocontext *c, *ctmp;
763 struct genfs *g, *gtmp;
765 struct role_allow *ra, *lra = NULL;
766 struct role_trans *tr, *ltr = NULL;
768 for (i = 0; i < SYM_NUM; i++) {
770 hashtab_map(p->symtab[i].table, destroy_f[i], NULL);
771 hashtab_destroy(p->symtab[i].table);
774 for (i = 0; i < SYM_NUM; i++)
775 kvfree(p->sym_val_to_name[i]);
777 kfree(p->class_val_to_struct);
778 kfree(p->role_val_to_struct);
779 kfree(p->user_val_to_struct);
780 kvfree(p->type_val_to_struct_array);
782 avtab_destroy(&p->te_avtab);
784 for (i = 0; i < OCON_NUM; i++) {
790 ocontext_destroy(ctmp, i);
792 p->ocontexts[i] = NULL;
803 ocontext_destroy(ctmp, OCON_FSUSE);
811 cond_policydb_destroy(p);
813 for (tr = p->role_tr; tr; tr = tr->next) {
820 for (ra = p->role_allow; ra; ra = ra->next) {
827 hashtab_map(p->filename_trans, filenametr_destroy, NULL);
828 hashtab_destroy(p->filename_trans);
830 hashtab_map(p->range_tr, range_tr_destroy, NULL);
831 hashtab_destroy(p->range_tr);
833 if (p->type_attr_map_array) {
834 for (i = 0; i < p->p_types.nprim; i++)
835 ebitmap_destroy(&p->type_attr_map_array[i]);
836 kvfree(p->type_attr_map_array);
839 ebitmap_destroy(&p->filename_trans_ttypes);
840 ebitmap_destroy(&p->policycaps);
841 ebitmap_destroy(&p->permissive_map);
845 * Load the initial SIDs specified in a policy database
846 * structure into a SID table.
848 int policydb_load_isids(struct policydb *p, struct sidtab *s)
850 struct ocontext *head, *c;
855 pr_err("SELinux: out of memory on SID table init\n");
859 head = p->ocontexts[OCON_ISID];
860 for (c = head; c; c = c->next) {
862 if (!c->context[0].user) {
863 pr_err("SELinux: SID %s was never defined.\n",
868 if (c->sid[0] == SECSID_NULL || c->sid[0] > SECINITSID_NUM) {
869 pr_err("SELinux: Initial SID %s out of range.\n",
875 rc = sidtab_set_initial(s, c->sid[0], &c->context[0]);
877 pr_err("SELinux: unable to load initial SID %s.\n",
888 int policydb_class_isvalid(struct policydb *p, unsigned int class)
890 if (!class || class > p->p_classes.nprim)
895 int policydb_role_isvalid(struct policydb *p, unsigned int role)
897 if (!role || role > p->p_roles.nprim)
902 int policydb_type_isvalid(struct policydb *p, unsigned int type)
904 if (!type || type > p->p_types.nprim)
910 * Return 1 if the fields in the security context
911 * structure `c' are valid. Return 0 otherwise.
913 int policydb_context_isvalid(struct policydb *p, struct context *c)
915 struct role_datum *role;
916 struct user_datum *usrdatum;
918 if (!c->role || c->role > p->p_roles.nprim)
921 if (!c->user || c->user > p->p_users.nprim)
924 if (!c->type || c->type > p->p_types.nprim)
927 if (c->role != OBJECT_R_VAL) {
929 * Role must be authorized for the type.
931 role = p->role_val_to_struct[c->role - 1];
932 if (!role || !ebitmap_get_bit(&role->types, c->type - 1))
933 /* role may not be associated with type */
937 * User must be authorized for the role.
939 usrdatum = p->user_val_to_struct[c->user - 1];
943 if (!ebitmap_get_bit(&usrdatum->roles, c->role - 1))
944 /* user may not be associated with role */
948 if (!mls_context_isvalid(p, c))
955 * Read a MLS range structure from a policydb binary
956 * representation file.
958 static int mls_read_range_helper(struct mls_range *r, void *fp)
964 rc = next_entry(buf, fp, sizeof(u32));
969 items = le32_to_cpu(buf[0]);
970 if (items > ARRAY_SIZE(buf)) {
971 pr_err("SELinux: mls: range overflow\n");
975 rc = next_entry(buf, fp, sizeof(u32) * items);
977 pr_err("SELinux: mls: truncated range\n");
981 r->level[0].sens = le32_to_cpu(buf[0]);
983 r->level[1].sens = le32_to_cpu(buf[1]);
985 r->level[1].sens = r->level[0].sens;
987 rc = ebitmap_read(&r->level[0].cat, fp);
989 pr_err("SELinux: mls: error reading low categories\n");
993 rc = ebitmap_read(&r->level[1].cat, fp);
995 pr_err("SELinux: mls: error reading high categories\n");
999 rc = ebitmap_cpy(&r->level[1].cat, &r->level[0].cat);
1001 pr_err("SELinux: mls: out of memory\n");
1008 ebitmap_destroy(&r->level[0].cat);
1014 * Read and validate a security context structure
1015 * from a policydb binary representation file.
1017 static int context_read_and_validate(struct context *c,
1024 rc = next_entry(buf, fp, sizeof buf);
1026 pr_err("SELinux: context truncated\n");
1029 c->user = le32_to_cpu(buf[0]);
1030 c->role = le32_to_cpu(buf[1]);
1031 c->type = le32_to_cpu(buf[2]);
1032 if (p->policyvers >= POLICYDB_VERSION_MLS) {
1033 rc = mls_read_range_helper(&c->range, fp);
1035 pr_err("SELinux: error reading MLS range of context\n");
1041 if (!policydb_context_isvalid(p, c)) {
1042 pr_err("SELinux: invalid security context\n");
1052 * The following *_read functions are used to
1053 * read the symbol data from a policy database
1054 * binary representation file.
1057 static int str_read(char **strp, gfp_t flags, void *fp, u32 len)
1062 if ((len == 0) || (len == (u32)-1))
1065 str = kmalloc(len + 1, flags | __GFP_NOWARN);
1069 /* it's expected the caller should free the str */
1072 rc = next_entry(str, fp, len);
1080 static int perm_read(struct policydb *p, struct hashtab *h, void *fp)
1083 struct perm_datum *perdatum;
1088 perdatum = kzalloc(sizeof(*perdatum), GFP_KERNEL);
1092 rc = next_entry(buf, fp, sizeof buf);
1096 len = le32_to_cpu(buf[0]);
1097 perdatum->value = le32_to_cpu(buf[1]);
1099 rc = str_read(&key, GFP_KERNEL, fp, len);
1103 rc = hashtab_insert(h, key, perdatum);
1109 perm_destroy(key, perdatum, NULL);
1113 static int common_read(struct policydb *p, struct hashtab *h, void *fp)
1116 struct common_datum *comdatum;
1121 comdatum = kzalloc(sizeof(*comdatum), GFP_KERNEL);
1125 rc = next_entry(buf, fp, sizeof buf);
1129 len = le32_to_cpu(buf[0]);
1130 comdatum->value = le32_to_cpu(buf[1]);
1132 rc = symtab_init(&comdatum->permissions, PERM_SYMTAB_SIZE);
1135 comdatum->permissions.nprim = le32_to_cpu(buf[2]);
1136 nel = le32_to_cpu(buf[3]);
1138 rc = str_read(&key, GFP_KERNEL, fp, len);
1142 for (i = 0; i < nel; i++) {
1143 rc = perm_read(p, comdatum->permissions.table, fp);
1148 rc = hashtab_insert(h, key, comdatum);
1153 common_destroy(key, comdatum, NULL);
1157 static void type_set_init(struct type_set *t)
1159 ebitmap_init(&t->types);
1160 ebitmap_init(&t->negset);
1163 static int type_set_read(struct type_set *t, void *fp)
1168 if (ebitmap_read(&t->types, fp))
1170 if (ebitmap_read(&t->negset, fp))
1173 rc = next_entry(buf, fp, sizeof(u32));
1176 t->flags = le32_to_cpu(buf[0]);
1182 static int read_cons_helper(struct policydb *p,
1183 struct constraint_node **nodep,
1184 int ncons, int allowxtarget, void *fp)
1186 struct constraint_node *c, *lc;
1187 struct constraint_expr *e, *le;
1190 int rc, i, j, depth;
1193 for (i = 0; i < ncons; i++) {
1194 c = kzalloc(sizeof(*c), GFP_KERNEL);
1203 rc = next_entry(buf, fp, (sizeof(u32) * 2));
1206 c->permissions = le32_to_cpu(buf[0]);
1207 nexpr = le32_to_cpu(buf[1]);
1210 for (j = 0; j < nexpr; j++) {
1211 e = kzalloc(sizeof(*e), GFP_KERNEL);
1220 rc = next_entry(buf, fp, (sizeof(u32) * 3));
1223 e->expr_type = le32_to_cpu(buf[0]);
1224 e->attr = le32_to_cpu(buf[1]);
1225 e->op = le32_to_cpu(buf[2]);
1227 switch (e->expr_type) {
1239 if (depth == (CEXPR_MAXDEPTH - 1))
1244 if (!allowxtarget && (e->attr & CEXPR_XTARGET))
1246 if (depth == (CEXPR_MAXDEPTH - 1))
1249 rc = ebitmap_read(&e->names, fp);
1252 if (p->policyvers >=
1253 POLICYDB_VERSION_CONSTRAINT_NAMES) {
1254 e->type_names = kzalloc(sizeof
1259 type_set_init(e->type_names);
1260 rc = type_set_read(e->type_names, fp);
1278 static int class_read(struct policydb *p, struct hashtab *h, void *fp)
1281 struct class_datum *cladatum;
1283 u32 len, len2, ncons, nel;
1286 cladatum = kzalloc(sizeof(*cladatum), GFP_KERNEL);
1290 rc = next_entry(buf, fp, sizeof(u32)*6);
1294 len = le32_to_cpu(buf[0]);
1295 len2 = le32_to_cpu(buf[1]);
1296 cladatum->value = le32_to_cpu(buf[2]);
1298 rc = symtab_init(&cladatum->permissions, PERM_SYMTAB_SIZE);
1301 cladatum->permissions.nprim = le32_to_cpu(buf[3]);
1302 nel = le32_to_cpu(buf[4]);
1304 ncons = le32_to_cpu(buf[5]);
1306 rc = str_read(&key, GFP_KERNEL, fp, len);
1311 rc = str_read(&cladatum->comkey, GFP_KERNEL, fp, len2);
1316 cladatum->comdatum = hashtab_search(p->p_commons.table, cladatum->comkey);
1317 if (!cladatum->comdatum) {
1318 pr_err("SELinux: unknown common %s\n",
1323 for (i = 0; i < nel; i++) {
1324 rc = perm_read(p, cladatum->permissions.table, fp);
1329 rc = read_cons_helper(p, &cladatum->constraints, ncons, 0, fp);
1333 if (p->policyvers >= POLICYDB_VERSION_VALIDATETRANS) {
1334 /* grab the validatetrans rules */
1335 rc = next_entry(buf, fp, sizeof(u32));
1338 ncons = le32_to_cpu(buf[0]);
1339 rc = read_cons_helper(p, &cladatum->validatetrans,
1345 if (p->policyvers >= POLICYDB_VERSION_NEW_OBJECT_DEFAULTS) {
1346 rc = next_entry(buf, fp, sizeof(u32) * 3);
1350 cladatum->default_user = le32_to_cpu(buf[0]);
1351 cladatum->default_role = le32_to_cpu(buf[1]);
1352 cladatum->default_range = le32_to_cpu(buf[2]);
1355 if (p->policyvers >= POLICYDB_VERSION_DEFAULT_TYPE) {
1356 rc = next_entry(buf, fp, sizeof(u32) * 1);
1359 cladatum->default_type = le32_to_cpu(buf[0]);
1362 rc = hashtab_insert(h, key, cladatum);
1368 cls_destroy(key, cladatum, NULL);
1372 static int role_read(struct policydb *p, struct hashtab *h, void *fp)
1375 struct role_datum *role;
1376 int rc, to_read = 2;
1380 role = kzalloc(sizeof(*role), GFP_KERNEL);
1384 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1387 rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1391 len = le32_to_cpu(buf[0]);
1392 role->value = le32_to_cpu(buf[1]);
1393 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1394 role->bounds = le32_to_cpu(buf[2]);
1396 rc = str_read(&key, GFP_KERNEL, fp, len);
1400 rc = ebitmap_read(&role->dominates, fp);
1404 rc = ebitmap_read(&role->types, fp);
1408 if (strcmp(key, OBJECT_R) == 0) {
1410 if (role->value != OBJECT_R_VAL) {
1411 pr_err("SELinux: Role %s has wrong value %d\n",
1412 OBJECT_R, role->value);
1419 rc = hashtab_insert(h, key, role);
1424 role_destroy(key, role, NULL);
1428 static int type_read(struct policydb *p, struct hashtab *h, void *fp)
1431 struct type_datum *typdatum;
1432 int rc, to_read = 3;
1436 typdatum = kzalloc(sizeof(*typdatum), GFP_KERNEL);
1440 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1443 rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1447 len = le32_to_cpu(buf[0]);
1448 typdatum->value = le32_to_cpu(buf[1]);
1449 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) {
1450 u32 prop = le32_to_cpu(buf[2]);
1452 if (prop & TYPEDATUM_PROPERTY_PRIMARY)
1453 typdatum->primary = 1;
1454 if (prop & TYPEDATUM_PROPERTY_ATTRIBUTE)
1455 typdatum->attribute = 1;
1457 typdatum->bounds = le32_to_cpu(buf[3]);
1459 typdatum->primary = le32_to_cpu(buf[2]);
1462 rc = str_read(&key, GFP_KERNEL, fp, len);
1466 rc = hashtab_insert(h, key, typdatum);
1471 type_destroy(key, typdatum, NULL);
1477 * Read a MLS level structure from a policydb binary
1478 * representation file.
1480 static int mls_read_level(struct mls_level *lp, void *fp)
1485 memset(lp, 0, sizeof(*lp));
1487 rc = next_entry(buf, fp, sizeof buf);
1489 pr_err("SELinux: mls: truncated level\n");
1492 lp->sens = le32_to_cpu(buf[0]);
1494 rc = ebitmap_read(&lp->cat, fp);
1496 pr_err("SELinux: mls: error reading level categories\n");
1502 static int user_read(struct policydb *p, struct hashtab *h, void *fp)
1505 struct user_datum *usrdatum;
1506 int rc, to_read = 2;
1510 usrdatum = kzalloc(sizeof(*usrdatum), GFP_KERNEL);
1514 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1517 rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1521 len = le32_to_cpu(buf[0]);
1522 usrdatum->value = le32_to_cpu(buf[1]);
1523 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1524 usrdatum->bounds = le32_to_cpu(buf[2]);
1526 rc = str_read(&key, GFP_KERNEL, fp, len);
1530 rc = ebitmap_read(&usrdatum->roles, fp);
1534 if (p->policyvers >= POLICYDB_VERSION_MLS) {
1535 rc = mls_read_range_helper(&usrdatum->range, fp);
1538 rc = mls_read_level(&usrdatum->dfltlevel, fp);
1543 rc = hashtab_insert(h, key, usrdatum);
1548 user_destroy(key, usrdatum, NULL);
1552 static int sens_read(struct policydb *p, struct hashtab *h, void *fp)
1555 struct level_datum *levdatum;
1560 levdatum = kzalloc(sizeof(*levdatum), GFP_ATOMIC);
1564 rc = next_entry(buf, fp, sizeof buf);
1568 len = le32_to_cpu(buf[0]);
1569 levdatum->isalias = le32_to_cpu(buf[1]);
1571 rc = str_read(&key, GFP_ATOMIC, fp, len);
1576 levdatum->level = kmalloc(sizeof(*levdatum->level), GFP_ATOMIC);
1577 if (!levdatum->level)
1580 rc = mls_read_level(levdatum->level, fp);
1584 rc = hashtab_insert(h, key, levdatum);
1589 sens_destroy(key, levdatum, NULL);
1593 static int cat_read(struct policydb *p, struct hashtab *h, void *fp)
1596 struct cat_datum *catdatum;
1601 catdatum = kzalloc(sizeof(*catdatum), GFP_ATOMIC);
1605 rc = next_entry(buf, fp, sizeof buf);
1609 len = le32_to_cpu(buf[0]);
1610 catdatum->value = le32_to_cpu(buf[1]);
1611 catdatum->isalias = le32_to_cpu(buf[2]);
1613 rc = str_read(&key, GFP_ATOMIC, fp, len);
1617 rc = hashtab_insert(h, key, catdatum);
1622 cat_destroy(key, catdatum, NULL);
1626 static int (*read_f[SYM_NUM]) (struct policydb *p, struct hashtab *h, void *fp) =
1638 static int user_bounds_sanity_check(void *key, void *datum, void *datap)
1640 struct user_datum *upper, *user;
1641 struct policydb *p = datap;
1644 upper = user = datum;
1645 while (upper->bounds) {
1646 struct ebitmap_node *node;
1649 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1650 pr_err("SELinux: user %s: "
1651 "too deep or looped boundary",
1656 upper = p->user_val_to_struct[upper->bounds - 1];
1657 ebitmap_for_each_positive_bit(&user->roles, node, bit) {
1658 if (ebitmap_get_bit(&upper->roles, bit))
1661 pr_err("SELinux: boundary violated policy: "
1662 "user=%s role=%s bounds=%s\n",
1663 sym_name(p, SYM_USERS, user->value - 1),
1664 sym_name(p, SYM_ROLES, bit),
1665 sym_name(p, SYM_USERS, upper->value - 1));
1674 static int role_bounds_sanity_check(void *key, void *datum, void *datap)
1676 struct role_datum *upper, *role;
1677 struct policydb *p = datap;
1680 upper = role = datum;
1681 while (upper->bounds) {
1682 struct ebitmap_node *node;
1685 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1686 pr_err("SELinux: role %s: "
1687 "too deep or looped bounds\n",
1692 upper = p->role_val_to_struct[upper->bounds - 1];
1693 ebitmap_for_each_positive_bit(&role->types, node, bit) {
1694 if (ebitmap_get_bit(&upper->types, bit))
1697 pr_err("SELinux: boundary violated policy: "
1698 "role=%s type=%s bounds=%s\n",
1699 sym_name(p, SYM_ROLES, role->value - 1),
1700 sym_name(p, SYM_TYPES, bit),
1701 sym_name(p, SYM_ROLES, upper->value - 1));
1710 static int type_bounds_sanity_check(void *key, void *datum, void *datap)
1712 struct type_datum *upper;
1713 struct policydb *p = datap;
1717 while (upper->bounds) {
1718 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1719 pr_err("SELinux: type %s: "
1720 "too deep or looped boundary\n",
1725 upper = p->type_val_to_struct_array[upper->bounds - 1];
1728 if (upper->attribute) {
1729 pr_err("SELinux: type %s: "
1730 "bounded by attribute %s",
1732 sym_name(p, SYM_TYPES, upper->value - 1));
1740 static int policydb_bounds_sanity_check(struct policydb *p)
1744 if (p->policyvers < POLICYDB_VERSION_BOUNDARY)
1747 rc = hashtab_map(p->p_users.table,
1748 user_bounds_sanity_check, p);
1752 rc = hashtab_map(p->p_roles.table,
1753 role_bounds_sanity_check, p);
1757 rc = hashtab_map(p->p_types.table,
1758 type_bounds_sanity_check, p);
1765 u16 string_to_security_class(struct policydb *p, const char *name)
1767 struct class_datum *cladatum;
1769 cladatum = hashtab_search(p->p_classes.table, name);
1773 return cladatum->value;
1776 u32 string_to_av_perm(struct policydb *p, u16 tclass, const char *name)
1778 struct class_datum *cladatum;
1779 struct perm_datum *perdatum = NULL;
1780 struct common_datum *comdatum;
1782 if (!tclass || tclass > p->p_classes.nprim)
1785 cladatum = p->class_val_to_struct[tclass-1];
1786 comdatum = cladatum->comdatum;
1788 perdatum = hashtab_search(comdatum->permissions.table,
1791 perdatum = hashtab_search(cladatum->permissions.table,
1796 return 1U << (perdatum->value-1);
1799 static int range_read(struct policydb *p, void *fp)
1801 struct range_trans *rt = NULL;
1802 struct mls_range *r = NULL;
1807 if (p->policyvers < POLICYDB_VERSION_MLS)
1810 rc = next_entry(buf, fp, sizeof(u32));
1814 nel = le32_to_cpu(buf[0]);
1815 for (i = 0; i < nel; i++) {
1817 rt = kzalloc(sizeof(*rt), GFP_KERNEL);
1821 rc = next_entry(buf, fp, (sizeof(u32) * 2));
1825 rt->source_type = le32_to_cpu(buf[0]);
1826 rt->target_type = le32_to_cpu(buf[1]);
1827 if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) {
1828 rc = next_entry(buf, fp, sizeof(u32));
1831 rt->target_class = le32_to_cpu(buf[0]);
1833 rt->target_class = p->process_class;
1836 if (!policydb_type_isvalid(p, rt->source_type) ||
1837 !policydb_type_isvalid(p, rt->target_type) ||
1838 !policydb_class_isvalid(p, rt->target_class))
1842 r = kzalloc(sizeof(*r), GFP_KERNEL);
1846 rc = mls_read_range_helper(r, fp);
1851 if (!mls_range_isvalid(p, r)) {
1852 pr_warn("SELinux: rangetrans: invalid range\n");
1856 rc = hashtab_insert(p->range_tr, rt, r);
1863 hash_eval(p->range_tr, "rangetr");
1871 static int filename_trans_read(struct policydb *p, void *fp)
1873 struct filename_trans *ft;
1874 struct filename_trans_datum *otype;
1880 if (p->policyvers < POLICYDB_VERSION_FILENAME_TRANS)
1883 rc = next_entry(buf, fp, sizeof(u32));
1886 nel = le32_to_cpu(buf[0]);
1888 for (i = 0; i < nel; i++) {
1893 ft = kzalloc(sizeof(*ft), GFP_KERNEL);
1898 otype = kmalloc(sizeof(*otype), GFP_KERNEL);
1902 /* length of the path component string */
1903 rc = next_entry(buf, fp, sizeof(u32));
1906 len = le32_to_cpu(buf[0]);
1908 /* path component string */
1909 rc = str_read(&name, GFP_KERNEL, fp, len);
1915 rc = next_entry(buf, fp, sizeof(u32) * 4);
1919 ft->stype = le32_to_cpu(buf[0]);
1920 ft->ttype = le32_to_cpu(buf[1]);
1921 ft->tclass = le32_to_cpu(buf[2]);
1923 otype->otype = le32_to_cpu(buf[3]);
1925 rc = ebitmap_set_bit(&p->filename_trans_ttypes, ft->ttype, 1);
1929 rc = hashtab_insert(p->filename_trans, ft, otype);
1932 * Do not return -EEXIST to the caller, or the system
1937 /* But free memory to avoid memory leak. */
1943 hash_eval(p->filename_trans, "filenametr");
1953 static int genfs_read(struct policydb *p, void *fp)
1956 u32 nel, nel2, len, len2;
1958 struct ocontext *l, *c;
1959 struct ocontext *newc = NULL;
1960 struct genfs *genfs_p, *genfs;
1961 struct genfs *newgenfs = NULL;
1963 rc = next_entry(buf, fp, sizeof(u32));
1966 nel = le32_to_cpu(buf[0]);
1968 for (i = 0; i < nel; i++) {
1969 rc = next_entry(buf, fp, sizeof(u32));
1972 len = le32_to_cpu(buf[0]);
1975 newgenfs = kzalloc(sizeof(*newgenfs), GFP_KERNEL);
1979 rc = str_read(&newgenfs->fstype, GFP_KERNEL, fp, len);
1983 for (genfs_p = NULL, genfs = p->genfs; genfs;
1984 genfs_p = genfs, genfs = genfs->next) {
1986 if (strcmp(newgenfs->fstype, genfs->fstype) == 0) {
1987 pr_err("SELinux: dup genfs fstype %s\n",
1991 if (strcmp(newgenfs->fstype, genfs->fstype) < 0)
1994 newgenfs->next = genfs;
1996 genfs_p->next = newgenfs;
1998 p->genfs = newgenfs;
2002 rc = next_entry(buf, fp, sizeof(u32));
2006 nel2 = le32_to_cpu(buf[0]);
2007 for (j = 0; j < nel2; j++) {
2008 rc = next_entry(buf, fp, sizeof(u32));
2011 len = le32_to_cpu(buf[0]);
2014 newc = kzalloc(sizeof(*newc), GFP_KERNEL);
2018 rc = str_read(&newc->u.name, GFP_KERNEL, fp, len);
2022 rc = next_entry(buf, fp, sizeof(u32));
2026 newc->v.sclass = le32_to_cpu(buf[0]);
2027 rc = context_read_and_validate(&newc->context[0], p, fp);
2031 for (l = NULL, c = genfs->head; c;
2032 l = c, c = c->next) {
2034 if (!strcmp(newc->u.name, c->u.name) &&
2035 (!c->v.sclass || !newc->v.sclass ||
2036 newc->v.sclass == c->v.sclass)) {
2037 pr_err("SELinux: dup genfs entry (%s,%s)\n",
2038 genfs->fstype, c->u.name);
2041 len = strlen(newc->u.name);
2042 len2 = strlen(c->u.name);
2058 kfree(newgenfs->fstype);
2061 ocontext_destroy(newc, OCON_FSUSE);
2066 static int ocontext_read(struct policydb *p, struct policydb_compat_info *info,
2071 __be64 prefixbuf[1];
2073 struct ocontext *l, *c;
2076 for (i = 0; i < info->ocon_num; i++) {
2077 rc = next_entry(buf, fp, sizeof(u32));
2080 nel = le32_to_cpu(buf[0]);
2083 for (j = 0; j < nel; j++) {
2085 c = kzalloc(sizeof(*c), GFP_KERNEL);
2091 p->ocontexts[i] = c;
2096 rc = next_entry(buf, fp, sizeof(u32));
2100 c->sid[0] = le32_to_cpu(buf[0]);
2101 rc = context_read_and_validate(&c->context[0], p, fp);
2107 rc = next_entry(buf, fp, sizeof(u32));
2110 len = le32_to_cpu(buf[0]);
2112 rc = str_read(&c->u.name, GFP_KERNEL, fp, len);
2116 rc = context_read_and_validate(&c->context[0], p, fp);
2119 rc = context_read_and_validate(&c->context[1], p, fp);
2124 rc = next_entry(buf, fp, sizeof(u32)*3);
2127 c->u.port.protocol = le32_to_cpu(buf[0]);
2128 c->u.port.low_port = le32_to_cpu(buf[1]);
2129 c->u.port.high_port = le32_to_cpu(buf[2]);
2130 rc = context_read_and_validate(&c->context[0], p, fp);
2135 rc = next_entry(nodebuf, fp, sizeof(u32) * 2);
2138 c->u.node.addr = nodebuf[0]; /* network order */
2139 c->u.node.mask = nodebuf[1]; /* network order */
2140 rc = context_read_and_validate(&c->context[0], p, fp);
2145 rc = next_entry(buf, fp, sizeof(u32)*2);
2150 c->v.behavior = le32_to_cpu(buf[0]);
2151 /* Determined at runtime, not in policy DB. */
2152 if (c->v.behavior == SECURITY_FS_USE_MNTPOINT)
2154 if (c->v.behavior > SECURITY_FS_USE_MAX)
2157 len = le32_to_cpu(buf[1]);
2158 rc = str_read(&c->u.name, GFP_KERNEL, fp, len);
2162 rc = context_read_and_validate(&c->context[0], p, fp);
2169 rc = next_entry(nodebuf, fp, sizeof(u32) * 8);
2172 for (k = 0; k < 4; k++)
2173 c->u.node6.addr[k] = nodebuf[k];
2174 for (k = 0; k < 4; k++)
2175 c->u.node6.mask[k] = nodebuf[k+4];
2176 rc = context_read_and_validate(&c->context[0], p, fp);
2182 u32 pkey_lo, pkey_hi;
2184 rc = next_entry(prefixbuf, fp, sizeof(u64));
2188 /* we need to have subnet_prefix in CPU order */
2189 c->u.ibpkey.subnet_prefix = be64_to_cpu(prefixbuf[0]);
2191 rc = next_entry(buf, fp, sizeof(u32) * 2);
2195 pkey_lo = le32_to_cpu(buf[0]);
2196 pkey_hi = le32_to_cpu(buf[1]);
2198 if (pkey_lo > U16_MAX || pkey_hi > U16_MAX) {
2203 c->u.ibpkey.low_pkey = pkey_lo;
2204 c->u.ibpkey.high_pkey = pkey_hi;
2206 rc = context_read_and_validate(&c->context[0],
2213 case OCON_IBENDPORT: {
2216 rc = next_entry(buf, fp, sizeof(u32) * 2);
2219 len = le32_to_cpu(buf[0]);
2221 rc = str_read(&c->u.ibendport.dev_name, GFP_KERNEL, fp, len);
2225 port = le32_to_cpu(buf[1]);
2226 if (port > U8_MAX || port == 0) {
2231 c->u.ibendport.port = port;
2233 rc = context_read_and_validate(&c->context[0],
2249 * Read the configuration data from a policy database binary
2250 * representation file into a policy database structure.
2252 int policydb_read(struct policydb *p, void *fp)
2254 struct role_allow *ra, *lra;
2255 struct role_trans *tr, *ltr;
2258 u32 len, nprim, nel;
2261 struct policydb_compat_info *info;
2263 rc = policydb_init(p);
2267 /* Read the magic number and string length. */
2268 rc = next_entry(buf, fp, sizeof(u32) * 2);
2273 if (le32_to_cpu(buf[0]) != POLICYDB_MAGIC) {
2274 pr_err("SELinux: policydb magic number 0x%x does "
2275 "not match expected magic number 0x%x\n",
2276 le32_to_cpu(buf[0]), POLICYDB_MAGIC);
2281 len = le32_to_cpu(buf[1]);
2282 if (len != strlen(POLICYDB_STRING)) {
2283 pr_err("SELinux: policydb string length %d does not "
2284 "match expected length %zu\n",
2285 len, strlen(POLICYDB_STRING));
2290 policydb_str = kmalloc(len + 1, GFP_KERNEL);
2291 if (!policydb_str) {
2292 pr_err("SELinux: unable to allocate memory for policydb "
2293 "string of length %d\n", len);
2297 rc = next_entry(policydb_str, fp, len);
2299 pr_err("SELinux: truncated policydb string identifier\n");
2300 kfree(policydb_str);
2305 policydb_str[len] = '\0';
2306 if (strcmp(policydb_str, POLICYDB_STRING)) {
2307 pr_err("SELinux: policydb string %s does not match "
2308 "my string %s\n", policydb_str, POLICYDB_STRING);
2309 kfree(policydb_str);
2312 /* Done with policydb_str. */
2313 kfree(policydb_str);
2314 policydb_str = NULL;
2316 /* Read the version and table sizes. */
2317 rc = next_entry(buf, fp, sizeof(u32)*4);
2322 p->policyvers = le32_to_cpu(buf[0]);
2323 if (p->policyvers < POLICYDB_VERSION_MIN ||
2324 p->policyvers > POLICYDB_VERSION_MAX) {
2325 pr_err("SELinux: policydb version %d does not match "
2326 "my version range %d-%d\n",
2327 le32_to_cpu(buf[0]), POLICYDB_VERSION_MIN, POLICYDB_VERSION_MAX);
2331 if ((le32_to_cpu(buf[1]) & POLICYDB_CONFIG_MLS)) {
2335 if (p->policyvers < POLICYDB_VERSION_MLS) {
2336 pr_err("SELinux: security policydb version %d "
2337 "(MLS) not backwards compatible\n",
2342 p->reject_unknown = !!(le32_to_cpu(buf[1]) & REJECT_UNKNOWN);
2343 p->allow_unknown = !!(le32_to_cpu(buf[1]) & ALLOW_UNKNOWN);
2345 if (p->policyvers >= POLICYDB_VERSION_POLCAP) {
2346 rc = ebitmap_read(&p->policycaps, fp);
2351 if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE) {
2352 rc = ebitmap_read(&p->permissive_map, fp);
2358 info = policydb_lookup_compat(p->policyvers);
2360 pr_err("SELinux: unable to find policy compat info "
2361 "for version %d\n", p->policyvers);
2366 if (le32_to_cpu(buf[2]) != info->sym_num ||
2367 le32_to_cpu(buf[3]) != info->ocon_num) {
2368 pr_err("SELinux: policydb table sizes (%d,%d) do "
2369 "not match mine (%d,%d)\n", le32_to_cpu(buf[2]),
2370 le32_to_cpu(buf[3]),
2371 info->sym_num, info->ocon_num);
2375 for (i = 0; i < info->sym_num; i++) {
2376 rc = next_entry(buf, fp, sizeof(u32)*2);
2379 nprim = le32_to_cpu(buf[0]);
2380 nel = le32_to_cpu(buf[1]);
2381 for (j = 0; j < nel; j++) {
2382 rc = read_f[i](p, p->symtab[i].table, fp);
2387 p->symtab[i].nprim = nprim;
2391 p->process_class = string_to_security_class(p, "process");
2392 if (!p->process_class)
2395 rc = avtab_read(&p->te_avtab, fp, p);
2399 if (p->policyvers >= POLICYDB_VERSION_BOOL) {
2400 rc = cond_read_list(p, fp);
2405 rc = next_entry(buf, fp, sizeof(u32));
2408 nel = le32_to_cpu(buf[0]);
2410 for (i = 0; i < nel; i++) {
2412 tr = kzalloc(sizeof(*tr), GFP_KERNEL);
2419 rc = next_entry(buf, fp, sizeof(u32)*3);
2424 tr->role = le32_to_cpu(buf[0]);
2425 tr->type = le32_to_cpu(buf[1]);
2426 tr->new_role = le32_to_cpu(buf[2]);
2427 if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) {
2428 rc = next_entry(buf, fp, sizeof(u32));
2431 tr->tclass = le32_to_cpu(buf[0]);
2433 tr->tclass = p->process_class;
2436 if (!policydb_role_isvalid(p, tr->role) ||
2437 !policydb_type_isvalid(p, tr->type) ||
2438 !policydb_class_isvalid(p, tr->tclass) ||
2439 !policydb_role_isvalid(p, tr->new_role))
2444 rc = next_entry(buf, fp, sizeof(u32));
2447 nel = le32_to_cpu(buf[0]);
2449 for (i = 0; i < nel; i++) {
2451 ra = kzalloc(sizeof(*ra), GFP_KERNEL);
2458 rc = next_entry(buf, fp, sizeof(u32)*2);
2463 ra->role = le32_to_cpu(buf[0]);
2464 ra->new_role = le32_to_cpu(buf[1]);
2465 if (!policydb_role_isvalid(p, ra->role) ||
2466 !policydb_role_isvalid(p, ra->new_role))
2471 rc = filename_trans_read(p, fp);
2475 rc = policydb_index(p);
2480 p->process_trans_perms = string_to_av_perm(p, p->process_class, "transition");
2481 p->process_trans_perms |= string_to_av_perm(p, p->process_class, "dyntransition");
2482 if (!p->process_trans_perms)
2485 rc = ocontext_read(p, info, fp);
2489 rc = genfs_read(p, fp);
2493 rc = range_read(p, fp);
2497 p->type_attr_map_array = kvcalloc(p->p_types.nprim,
2498 sizeof(*p->type_attr_map_array),
2500 if (!p->type_attr_map_array)
2503 /* just in case ebitmap_init() becomes more than just a memset(0): */
2504 for (i = 0; i < p->p_types.nprim; i++)
2505 ebitmap_init(&p->type_attr_map_array[i]);
2507 for (i = 0; i < p->p_types.nprim; i++) {
2508 struct ebitmap *e = &p->type_attr_map_array[i];
2510 if (p->policyvers >= POLICYDB_VERSION_AVTAB) {
2511 rc = ebitmap_read(e, fp);
2515 /* add the type itself as the degenerate case */
2516 rc = ebitmap_set_bit(e, i, 1);
2521 rc = policydb_bounds_sanity_check(p);
2529 policydb_destroy(p);
2534 * Write a MLS level structure to a policydb binary
2535 * representation file.
2537 static int mls_write_level(struct mls_level *l, void *fp)
2542 buf[0] = cpu_to_le32(l->sens);
2543 rc = put_entry(buf, sizeof(u32), 1, fp);
2547 rc = ebitmap_write(&l->cat, fp);
2555 * Write a MLS range structure to a policydb binary
2556 * representation file.
2558 static int mls_write_range_helper(struct mls_range *r, void *fp)
2564 eq = mls_level_eq(&r->level[1], &r->level[0]);
2570 buf[0] = cpu_to_le32(items-1);
2571 buf[1] = cpu_to_le32(r->level[0].sens);
2573 buf[2] = cpu_to_le32(r->level[1].sens);
2575 BUG_ON(items > ARRAY_SIZE(buf));
2577 rc = put_entry(buf, sizeof(u32), items, fp);
2581 rc = ebitmap_write(&r->level[0].cat, fp);
2585 rc = ebitmap_write(&r->level[1].cat, fp);
2593 static int sens_write(void *vkey, void *datum, void *ptr)
2596 struct level_datum *levdatum = datum;
2597 struct policy_data *pd = ptr;
2604 buf[0] = cpu_to_le32(len);
2605 buf[1] = cpu_to_le32(levdatum->isalias);
2606 rc = put_entry(buf, sizeof(u32), 2, fp);
2610 rc = put_entry(key, 1, len, fp);
2614 rc = mls_write_level(levdatum->level, fp);
2621 static int cat_write(void *vkey, void *datum, void *ptr)
2624 struct cat_datum *catdatum = datum;
2625 struct policy_data *pd = ptr;
2632 buf[0] = cpu_to_le32(len);
2633 buf[1] = cpu_to_le32(catdatum->value);
2634 buf[2] = cpu_to_le32(catdatum->isalias);
2635 rc = put_entry(buf, sizeof(u32), 3, fp);
2639 rc = put_entry(key, 1, len, fp);
2646 static int role_trans_write(struct policydb *p, void *fp)
2648 struct role_trans *r = p->role_tr;
2649 struct role_trans *tr;
2655 for (tr = r; tr; tr = tr->next)
2657 buf[0] = cpu_to_le32(nel);
2658 rc = put_entry(buf, sizeof(u32), 1, fp);
2661 for (tr = r; tr; tr = tr->next) {
2662 buf[0] = cpu_to_le32(tr->role);
2663 buf[1] = cpu_to_le32(tr->type);
2664 buf[2] = cpu_to_le32(tr->new_role);
2665 rc = put_entry(buf, sizeof(u32), 3, fp);
2668 if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) {
2669 buf[0] = cpu_to_le32(tr->tclass);
2670 rc = put_entry(buf, sizeof(u32), 1, fp);
2679 static int role_allow_write(struct role_allow *r, void *fp)
2681 struct role_allow *ra;
2687 for (ra = r; ra; ra = ra->next)
2689 buf[0] = cpu_to_le32(nel);
2690 rc = put_entry(buf, sizeof(u32), 1, fp);
2693 for (ra = r; ra; ra = ra->next) {
2694 buf[0] = cpu_to_le32(ra->role);
2695 buf[1] = cpu_to_le32(ra->new_role);
2696 rc = put_entry(buf, sizeof(u32), 2, fp);
2704 * Write a security context structure
2705 * to a policydb binary representation file.
2707 static int context_write(struct policydb *p, struct context *c,
2713 buf[0] = cpu_to_le32(c->user);
2714 buf[1] = cpu_to_le32(c->role);
2715 buf[2] = cpu_to_le32(c->type);
2717 rc = put_entry(buf, sizeof(u32), 3, fp);
2721 rc = mls_write_range_helper(&c->range, fp);
2729 * The following *_write functions are used to
2730 * write the symbol data to a policy database
2731 * binary representation file.
2734 static int perm_write(void *vkey, void *datum, void *fp)
2737 struct perm_datum *perdatum = datum;
2743 buf[0] = cpu_to_le32(len);
2744 buf[1] = cpu_to_le32(perdatum->value);
2745 rc = put_entry(buf, sizeof(u32), 2, fp);
2749 rc = put_entry(key, 1, len, fp);
2756 static int common_write(void *vkey, void *datum, void *ptr)
2759 struct common_datum *comdatum = datum;
2760 struct policy_data *pd = ptr;
2767 buf[0] = cpu_to_le32(len);
2768 buf[1] = cpu_to_le32(comdatum->value);
2769 buf[2] = cpu_to_le32(comdatum->permissions.nprim);
2770 buf[3] = cpu_to_le32(comdatum->permissions.table->nel);
2771 rc = put_entry(buf, sizeof(u32), 4, fp);
2775 rc = put_entry(key, 1, len, fp);
2779 rc = hashtab_map(comdatum->permissions.table, perm_write, fp);
2786 static int type_set_write(struct type_set *t, void *fp)
2791 if (ebitmap_write(&t->types, fp))
2793 if (ebitmap_write(&t->negset, fp))
2796 buf[0] = cpu_to_le32(t->flags);
2797 rc = put_entry(buf, sizeof(u32), 1, fp);
2804 static int write_cons_helper(struct policydb *p, struct constraint_node *node,
2807 struct constraint_node *c;
2808 struct constraint_expr *e;
2813 for (c = node; c; c = c->next) {
2815 for (e = c->expr; e; e = e->next)
2817 buf[0] = cpu_to_le32(c->permissions);
2818 buf[1] = cpu_to_le32(nel);
2819 rc = put_entry(buf, sizeof(u32), 2, fp);
2822 for (e = c->expr; e; e = e->next) {
2823 buf[0] = cpu_to_le32(e->expr_type);
2824 buf[1] = cpu_to_le32(e->attr);
2825 buf[2] = cpu_to_le32(e->op);
2826 rc = put_entry(buf, sizeof(u32), 3, fp);
2830 switch (e->expr_type) {
2832 rc = ebitmap_write(&e->names, fp);
2835 if (p->policyvers >=
2836 POLICYDB_VERSION_CONSTRAINT_NAMES) {
2837 rc = type_set_write(e->type_names, fp);
2851 static int class_write(void *vkey, void *datum, void *ptr)
2854 struct class_datum *cladatum = datum;
2855 struct policy_data *pd = ptr;
2857 struct policydb *p = pd->p;
2858 struct constraint_node *c;
2865 if (cladatum->comkey)
2866 len2 = strlen(cladatum->comkey);
2871 for (c = cladatum->constraints; c; c = c->next)
2874 buf[0] = cpu_to_le32(len);
2875 buf[1] = cpu_to_le32(len2);
2876 buf[2] = cpu_to_le32(cladatum->value);
2877 buf[3] = cpu_to_le32(cladatum->permissions.nprim);
2878 if (cladatum->permissions.table)
2879 buf[4] = cpu_to_le32(cladatum->permissions.table->nel);
2882 buf[5] = cpu_to_le32(ncons);
2883 rc = put_entry(buf, sizeof(u32), 6, fp);
2887 rc = put_entry(key, 1, len, fp);
2891 if (cladatum->comkey) {
2892 rc = put_entry(cladatum->comkey, 1, len2, fp);
2897 rc = hashtab_map(cladatum->permissions.table, perm_write, fp);
2901 rc = write_cons_helper(p, cladatum->constraints, fp);
2905 /* write out the validatetrans rule */
2907 for (c = cladatum->validatetrans; c; c = c->next)
2910 buf[0] = cpu_to_le32(ncons);
2911 rc = put_entry(buf, sizeof(u32), 1, fp);
2915 rc = write_cons_helper(p, cladatum->validatetrans, fp);
2919 if (p->policyvers >= POLICYDB_VERSION_NEW_OBJECT_DEFAULTS) {
2920 buf[0] = cpu_to_le32(cladatum->default_user);
2921 buf[1] = cpu_to_le32(cladatum->default_role);
2922 buf[2] = cpu_to_le32(cladatum->default_range);
2924 rc = put_entry(buf, sizeof(uint32_t), 3, fp);
2929 if (p->policyvers >= POLICYDB_VERSION_DEFAULT_TYPE) {
2930 buf[0] = cpu_to_le32(cladatum->default_type);
2931 rc = put_entry(buf, sizeof(uint32_t), 1, fp);
2939 static int role_write(void *vkey, void *datum, void *ptr)
2942 struct role_datum *role = datum;
2943 struct policy_data *pd = ptr;
2945 struct policydb *p = pd->p;
2952 buf[items++] = cpu_to_le32(len);
2953 buf[items++] = cpu_to_le32(role->value);
2954 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
2955 buf[items++] = cpu_to_le32(role->bounds);
2957 BUG_ON(items > ARRAY_SIZE(buf));
2959 rc = put_entry(buf, sizeof(u32), items, fp);
2963 rc = put_entry(key, 1, len, fp);
2967 rc = ebitmap_write(&role->dominates, fp);
2971 rc = ebitmap_write(&role->types, fp);
2978 static int type_write(void *vkey, void *datum, void *ptr)
2981 struct type_datum *typdatum = datum;
2982 struct policy_data *pd = ptr;
2983 struct policydb *p = pd->p;
2991 buf[items++] = cpu_to_le32(len);
2992 buf[items++] = cpu_to_le32(typdatum->value);
2993 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) {
2996 if (typdatum->primary)
2997 properties |= TYPEDATUM_PROPERTY_PRIMARY;
2999 if (typdatum->attribute)
3000 properties |= TYPEDATUM_PROPERTY_ATTRIBUTE;
3002 buf[items++] = cpu_to_le32(properties);
3003 buf[items++] = cpu_to_le32(typdatum->bounds);
3005 buf[items++] = cpu_to_le32(typdatum->primary);
3007 BUG_ON(items > ARRAY_SIZE(buf));
3008 rc = put_entry(buf, sizeof(u32), items, fp);
3012 rc = put_entry(key, 1, len, fp);
3019 static int user_write(void *vkey, void *datum, void *ptr)
3022 struct user_datum *usrdatum = datum;
3023 struct policy_data *pd = ptr;
3024 struct policydb *p = pd->p;
3032 buf[items++] = cpu_to_le32(len);
3033 buf[items++] = cpu_to_le32(usrdatum->value);
3034 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
3035 buf[items++] = cpu_to_le32(usrdatum->bounds);
3036 BUG_ON(items > ARRAY_SIZE(buf));
3037 rc = put_entry(buf, sizeof(u32), items, fp);
3041 rc = put_entry(key, 1, len, fp);
3045 rc = ebitmap_write(&usrdatum->roles, fp);
3049 rc = mls_write_range_helper(&usrdatum->range, fp);
3053 rc = mls_write_level(&usrdatum->dfltlevel, fp);
3060 static int (*write_f[SYM_NUM]) (void *key, void *datum,
3073 static int ocontext_write(struct policydb *p, struct policydb_compat_info *info,
3076 unsigned int i, j, rc;
3078 __be64 prefixbuf[1];
3082 for (i = 0; i < info->ocon_num; i++) {
3084 for (c = p->ocontexts[i]; c; c = c->next)
3086 buf[0] = cpu_to_le32(nel);
3087 rc = put_entry(buf, sizeof(u32), 1, fp);
3090 for (c = p->ocontexts[i]; c; c = c->next) {
3093 buf[0] = cpu_to_le32(c->sid[0]);
3094 rc = put_entry(buf, sizeof(u32), 1, fp);
3097 rc = context_write(p, &c->context[0], fp);
3103 len = strlen(c->u.name);
3104 buf[0] = cpu_to_le32(len);
3105 rc = put_entry(buf, sizeof(u32), 1, fp);
3108 rc = put_entry(c->u.name, 1, len, fp);
3111 rc = context_write(p, &c->context[0], fp);
3114 rc = context_write(p, &c->context[1], fp);
3119 buf[0] = cpu_to_le32(c->u.port.protocol);
3120 buf[1] = cpu_to_le32(c->u.port.low_port);
3121 buf[2] = cpu_to_le32(c->u.port.high_port);
3122 rc = put_entry(buf, sizeof(u32), 3, fp);
3125 rc = context_write(p, &c->context[0], fp);
3130 nodebuf[0] = c->u.node.addr; /* network order */
3131 nodebuf[1] = c->u.node.mask; /* network order */
3132 rc = put_entry(nodebuf, sizeof(u32), 2, fp);
3135 rc = context_write(p, &c->context[0], fp);
3140 buf[0] = cpu_to_le32(c->v.behavior);
3141 len = strlen(c->u.name);
3142 buf[1] = cpu_to_le32(len);
3143 rc = put_entry(buf, sizeof(u32), 2, fp);
3146 rc = put_entry(c->u.name, 1, len, fp);
3149 rc = context_write(p, &c->context[0], fp);
3154 for (j = 0; j < 4; j++)
3155 nodebuf[j] = c->u.node6.addr[j]; /* network order */
3156 for (j = 0; j < 4; j++)
3157 nodebuf[j + 4] = c->u.node6.mask[j]; /* network order */
3158 rc = put_entry(nodebuf, sizeof(u32), 8, fp);
3161 rc = context_write(p, &c->context[0], fp);
3166 /* subnet_prefix is in CPU order */
3167 prefixbuf[0] = cpu_to_be64(c->u.ibpkey.subnet_prefix);
3169 rc = put_entry(prefixbuf, sizeof(u64), 1, fp);
3173 buf[0] = cpu_to_le32(c->u.ibpkey.low_pkey);
3174 buf[1] = cpu_to_le32(c->u.ibpkey.high_pkey);
3176 rc = put_entry(buf, sizeof(u32), 2, fp);
3179 rc = context_write(p, &c->context[0], fp);
3183 case OCON_IBENDPORT:
3184 len = strlen(c->u.ibendport.dev_name);
3185 buf[0] = cpu_to_le32(len);
3186 buf[1] = cpu_to_le32(c->u.ibendport.port);
3187 rc = put_entry(buf, sizeof(u32), 2, fp);
3190 rc = put_entry(c->u.ibendport.dev_name, 1, len, fp);
3193 rc = context_write(p, &c->context[0], fp);
3203 static int genfs_write(struct policydb *p, void *fp)
3205 struct genfs *genfs;
3212 for (genfs = p->genfs; genfs; genfs = genfs->next)
3214 buf[0] = cpu_to_le32(len);
3215 rc = put_entry(buf, sizeof(u32), 1, fp);
3218 for (genfs = p->genfs; genfs; genfs = genfs->next) {
3219 len = strlen(genfs->fstype);
3220 buf[0] = cpu_to_le32(len);
3221 rc = put_entry(buf, sizeof(u32), 1, fp);
3224 rc = put_entry(genfs->fstype, 1, len, fp);
3228 for (c = genfs->head; c; c = c->next)
3230 buf[0] = cpu_to_le32(len);
3231 rc = put_entry(buf, sizeof(u32), 1, fp);
3234 for (c = genfs->head; c; c = c->next) {
3235 len = strlen(c->u.name);
3236 buf[0] = cpu_to_le32(len);
3237 rc = put_entry(buf, sizeof(u32), 1, fp);
3240 rc = put_entry(c->u.name, 1, len, fp);
3243 buf[0] = cpu_to_le32(c->v.sclass);
3244 rc = put_entry(buf, sizeof(u32), 1, fp);
3247 rc = context_write(p, &c->context[0], fp);
3255 static int hashtab_cnt(void *key, void *data, void *ptr)
3263 static int range_write_helper(void *key, void *data, void *ptr)
3266 struct range_trans *rt = key;
3267 struct mls_range *r = data;
3268 struct policy_data *pd = ptr;
3270 struct policydb *p = pd->p;
3273 buf[0] = cpu_to_le32(rt->source_type);
3274 buf[1] = cpu_to_le32(rt->target_type);
3275 rc = put_entry(buf, sizeof(u32), 2, fp);
3278 if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) {
3279 buf[0] = cpu_to_le32(rt->target_class);
3280 rc = put_entry(buf, sizeof(u32), 1, fp);
3284 rc = mls_write_range_helper(r, fp);
3291 static int range_write(struct policydb *p, void *fp)
3295 struct policy_data pd;
3300 /* count the number of entries in the hashtab */
3302 rc = hashtab_map(p->range_tr, hashtab_cnt, &nel);
3306 buf[0] = cpu_to_le32(nel);
3307 rc = put_entry(buf, sizeof(u32), 1, fp);
3311 /* actually write all of the entries */
3312 rc = hashtab_map(p->range_tr, range_write_helper, &pd);
3319 static int filename_write_helper(void *key, void *data, void *ptr)
3322 struct filename_trans *ft = key;
3323 struct filename_trans_datum *otype = data;
3328 len = strlen(ft->name);
3329 buf[0] = cpu_to_le32(len);
3330 rc = put_entry(buf, sizeof(u32), 1, fp);
3334 rc = put_entry(ft->name, sizeof(char), len, fp);
3338 buf[0] = cpu_to_le32(ft->stype);
3339 buf[1] = cpu_to_le32(ft->ttype);
3340 buf[2] = cpu_to_le32(ft->tclass);
3341 buf[3] = cpu_to_le32(otype->otype);
3343 rc = put_entry(buf, sizeof(u32), 4, fp);
3350 static int filename_trans_write(struct policydb *p, void *fp)
3356 if (p->policyvers < POLICYDB_VERSION_FILENAME_TRANS)
3360 rc = hashtab_map(p->filename_trans, hashtab_cnt, &nel);
3364 buf[0] = cpu_to_le32(nel);
3365 rc = put_entry(buf, sizeof(u32), 1, fp);
3369 rc = hashtab_map(p->filename_trans, filename_write_helper, fp);
3377 * Write the configuration data in a policy database
3378 * structure to a policy database binary representation
3381 int policydb_write(struct policydb *p, void *fp)
3383 unsigned int i, num_syms;
3388 struct policydb_compat_info *info;
3391 * refuse to write policy older than compressed avtab
3392 * to simplify the writer. There are other tests dropped
3393 * since we assume this throughout the writer code. Be
3394 * careful if you ever try to remove this restriction
3396 if (p->policyvers < POLICYDB_VERSION_AVTAB) {
3397 pr_err("SELinux: refusing to write policy version %d."
3398 " Because it is less than version %d\n", p->policyvers,
3399 POLICYDB_VERSION_AVTAB);
3405 config |= POLICYDB_CONFIG_MLS;
3407 if (p->reject_unknown)
3408 config |= REJECT_UNKNOWN;
3409 if (p->allow_unknown)
3410 config |= ALLOW_UNKNOWN;
3412 /* Write the magic number and string identifiers. */
3413 buf[0] = cpu_to_le32(POLICYDB_MAGIC);
3414 len = strlen(POLICYDB_STRING);
3415 buf[1] = cpu_to_le32(len);
3416 rc = put_entry(buf, sizeof(u32), 2, fp);
3419 rc = put_entry(POLICYDB_STRING, 1, len, fp);
3423 /* Write the version, config, and table sizes. */
3424 info = policydb_lookup_compat(p->policyvers);
3426 pr_err("SELinux: compatibility lookup failed for policy "
3427 "version %d", p->policyvers);
3431 buf[0] = cpu_to_le32(p->policyvers);
3432 buf[1] = cpu_to_le32(config);
3433 buf[2] = cpu_to_le32(info->sym_num);
3434 buf[3] = cpu_to_le32(info->ocon_num);
3436 rc = put_entry(buf, sizeof(u32), 4, fp);
3440 if (p->policyvers >= POLICYDB_VERSION_POLCAP) {
3441 rc = ebitmap_write(&p->policycaps, fp);
3446 if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE) {
3447 rc = ebitmap_write(&p->permissive_map, fp);
3452 num_syms = info->sym_num;
3453 for (i = 0; i < num_syms; i++) {
3454 struct policy_data pd;
3459 buf[0] = cpu_to_le32(p->symtab[i].nprim);
3460 buf[1] = cpu_to_le32(p->symtab[i].table->nel);
3462 rc = put_entry(buf, sizeof(u32), 2, fp);
3465 rc = hashtab_map(p->symtab[i].table, write_f[i], &pd);
3470 rc = avtab_write(p, &p->te_avtab, fp);
3474 rc = cond_write_list(p, p->cond_list, fp);
3478 rc = role_trans_write(p, fp);
3482 rc = role_allow_write(p->role_allow, fp);
3486 rc = filename_trans_write(p, fp);
3490 rc = ocontext_write(p, info, fp);
3494 rc = genfs_write(p, fp);
3498 rc = range_write(p, fp);
3502 for (i = 0; i < p->p_types.nprim; i++) {
3503 struct ebitmap *e = &p->type_attr_map_array[i];
3505 rc = ebitmap_write(e, fp);