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;
270 * Initialize a policy database structure.
272 static int policydb_init(struct policydb *p)
276 memset(p, 0, sizeof(*p));
278 for (i = 0; i < SYM_NUM; i++) {
279 rc = symtab_init(&p->symtab[i], symtab_sizes[i]);
284 rc = avtab_init(&p->te_avtab);
292 rc = cond_policydb_init(p);
296 p->filename_trans = hashtab_create(filenametr_hash, filenametr_cmp, (1 << 10));
297 if (!p->filename_trans) {
302 p->range_tr = hashtab_create(rangetr_hash, rangetr_cmp, 256);
308 ebitmap_init(&p->filename_trans_ttypes);
309 ebitmap_init(&p->policycaps);
310 ebitmap_init(&p->permissive_map);
314 hashtab_destroy(p->filename_trans);
315 hashtab_destroy(p->range_tr);
316 for (i = 0; i < SYM_NUM; i++)
317 hashtab_destroy(p->symtab[i].table);
322 * The following *_index functions are used to
323 * define the val_to_name and val_to_struct arrays
324 * in a policy database structure. The val_to_name
325 * arrays are used when converting security context
326 * structures into string representations. The
327 * val_to_struct arrays are used when the attributes
328 * of a class, role, or user are needed.
331 static int common_index(void *key, void *datum, void *datap)
334 struct common_datum *comdatum;
335 struct flex_array *fa;
339 if (!comdatum->value || comdatum->value > p->p_commons.nprim)
342 fa = p->sym_val_to_name[SYM_COMMONS];
343 if (flex_array_put_ptr(fa, comdatum->value - 1, key,
344 GFP_KERNEL | __GFP_ZERO))
349 static int class_index(void *key, void *datum, void *datap)
352 struct class_datum *cladatum;
353 struct flex_array *fa;
357 if (!cladatum->value || cladatum->value > p->p_classes.nprim)
359 fa = p->sym_val_to_name[SYM_CLASSES];
360 if (flex_array_put_ptr(fa, cladatum->value - 1, key,
361 GFP_KERNEL | __GFP_ZERO))
363 p->class_val_to_struct[cladatum->value - 1] = cladatum;
367 static int role_index(void *key, void *datum, void *datap)
370 struct role_datum *role;
371 struct flex_array *fa;
376 || role->value > p->p_roles.nprim
377 || role->bounds > p->p_roles.nprim)
380 fa = p->sym_val_to_name[SYM_ROLES];
381 if (flex_array_put_ptr(fa, role->value - 1, key,
382 GFP_KERNEL | __GFP_ZERO))
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;
392 struct flex_array *fa;
397 if (typdatum->primary) {
399 || typdatum->value > p->p_types.nprim
400 || typdatum->bounds > p->p_types.nprim)
402 fa = p->sym_val_to_name[SYM_TYPES];
403 if (flex_array_put_ptr(fa, typdatum->value - 1, key,
404 GFP_KERNEL | __GFP_ZERO))
407 fa = p->type_val_to_struct_array;
408 if (flex_array_put_ptr(fa, typdatum->value - 1, typdatum,
409 GFP_KERNEL | __GFP_ZERO))
416 static int user_index(void *key, void *datum, void *datap)
419 struct user_datum *usrdatum;
420 struct flex_array *fa;
425 || usrdatum->value > p->p_users.nprim
426 || usrdatum->bounds > p->p_users.nprim)
429 fa = p->sym_val_to_name[SYM_USERS];
430 if (flex_array_put_ptr(fa, usrdatum->value - 1, key,
431 GFP_KERNEL | __GFP_ZERO))
433 p->user_val_to_struct[usrdatum->value - 1] = usrdatum;
437 static int sens_index(void *key, void *datum, void *datap)
440 struct level_datum *levdatum;
441 struct flex_array *fa;
446 if (!levdatum->isalias) {
447 if (!levdatum->level->sens ||
448 levdatum->level->sens > p->p_levels.nprim)
450 fa = p->sym_val_to_name[SYM_LEVELS];
451 if (flex_array_put_ptr(fa, levdatum->level->sens - 1, key,
452 GFP_KERNEL | __GFP_ZERO))
459 static int cat_index(void *key, void *datum, void *datap)
462 struct cat_datum *catdatum;
463 struct flex_array *fa;
468 if (!catdatum->isalias) {
469 if (!catdatum->value || catdatum->value > p->p_cats.nprim)
471 fa = p->sym_val_to_name[SYM_CATS];
472 if (flex_array_put_ptr(fa, catdatum->value - 1, key,
473 GFP_KERNEL | __GFP_ZERO))
480 static int (*index_f[SYM_NUM]) (void *key, void *datum, void *datap) =
493 static void hash_eval(struct hashtab *h, const char *hash_name)
495 struct hashtab_info info;
497 hashtab_stat(h, &info);
498 printk(KERN_DEBUG "SELinux: %s: %d entries and %d/%d buckets used, "
499 "longest chain length %d\n", hash_name, h->nel,
500 info.slots_used, h->size, info.max_chain_len);
503 static void symtab_hash_eval(struct symtab *s)
507 for (i = 0; i < SYM_NUM; i++)
508 hash_eval(s[i].table, symtab_name[i]);
512 static inline void hash_eval(struct hashtab *h, char *hash_name)
518 * Define the other val_to_name and val_to_struct arrays
519 * in a policy database structure.
521 * Caller must clean up on failure.
523 static int policydb_index(struct policydb *p)
527 printk(KERN_DEBUG "SELinux: %d users, %d roles, %d types, %d bools",
528 p->p_users.nprim, p->p_roles.nprim, p->p_types.nprim, p->p_bools.nprim);
530 printk(KERN_CONT ", %d sens, %d cats", p->p_levels.nprim,
532 printk(KERN_CONT "\n");
534 printk(KERN_DEBUG "SELinux: %d classes, %d rules\n",
535 p->p_classes.nprim, p->te_avtab.nel);
538 avtab_hash_eval(&p->te_avtab, "rules");
539 symtab_hash_eval(p->symtab);
543 p->class_val_to_struct =
544 kzalloc(p->p_classes.nprim * sizeof(*(p->class_val_to_struct)),
546 if (!p->class_val_to_struct)
550 p->role_val_to_struct =
551 kzalloc(p->p_roles.nprim * sizeof(*(p->role_val_to_struct)),
553 if (!p->role_val_to_struct)
557 p->user_val_to_struct =
558 kzalloc(p->p_users.nprim * sizeof(*(p->user_val_to_struct)),
560 if (!p->user_val_to_struct)
563 /* Yes, I want the sizeof the pointer, not the structure */
565 p->type_val_to_struct_array = flex_array_alloc(sizeof(struct type_datum *),
567 GFP_KERNEL | __GFP_ZERO);
568 if (!p->type_val_to_struct_array)
571 rc = flex_array_prealloc(p->type_val_to_struct_array, 0,
572 p->p_types.nprim, GFP_KERNEL | __GFP_ZERO);
576 rc = cond_init_bool_indexes(p);
580 for (i = 0; i < SYM_NUM; i++) {
582 p->sym_val_to_name[i] = flex_array_alloc(sizeof(char *),
584 GFP_KERNEL | __GFP_ZERO);
585 if (!p->sym_val_to_name[i])
588 rc = flex_array_prealloc(p->sym_val_to_name[i],
589 0, p->symtab[i].nprim,
590 GFP_KERNEL | __GFP_ZERO);
594 rc = hashtab_map(p->symtab[i].table, index_f[i], p);
604 * The following *_destroy functions are used to
605 * free any memory allocated for each kind of
606 * symbol data in the policy database.
609 static int perm_destroy(void *key, void *datum, void *p)
616 static int common_destroy(void *key, void *datum, void *p)
618 struct common_datum *comdatum;
623 hashtab_map(comdatum->permissions.table, perm_destroy, NULL);
624 hashtab_destroy(comdatum->permissions.table);
630 static void constraint_expr_destroy(struct constraint_expr *expr)
633 ebitmap_destroy(&expr->names);
634 if (expr->type_names) {
635 ebitmap_destroy(&expr->type_names->types);
636 ebitmap_destroy(&expr->type_names->negset);
637 kfree(expr->type_names);
643 static int cls_destroy(void *key, void *datum, void *p)
645 struct class_datum *cladatum;
646 struct constraint_node *constraint, *ctemp;
647 struct constraint_expr *e, *etmp;
652 hashtab_map(cladatum->permissions.table, perm_destroy, NULL);
653 hashtab_destroy(cladatum->permissions.table);
654 constraint = cladatum->constraints;
656 e = constraint->expr;
660 constraint_expr_destroy(etmp);
663 constraint = constraint->next;
667 constraint = cladatum->validatetrans;
669 e = constraint->expr;
673 constraint_expr_destroy(etmp);
676 constraint = constraint->next;
679 kfree(cladatum->comkey);
685 static int role_destroy(void *key, void *datum, void *p)
687 struct role_datum *role;
692 ebitmap_destroy(&role->dominates);
693 ebitmap_destroy(&role->types);
699 static int type_destroy(void *key, void *datum, void *p)
706 static int user_destroy(void *key, void *datum, void *p)
708 struct user_datum *usrdatum;
713 ebitmap_destroy(&usrdatum->roles);
714 ebitmap_destroy(&usrdatum->range.level[0].cat);
715 ebitmap_destroy(&usrdatum->range.level[1].cat);
716 ebitmap_destroy(&usrdatum->dfltlevel.cat);
722 static int sens_destroy(void *key, void *datum, void *p)
724 struct level_datum *levdatum;
729 ebitmap_destroy(&levdatum->level->cat);
730 kfree(levdatum->level);
736 static int cat_destroy(void *key, void *datum, void *p)
743 static int (*destroy_f[SYM_NUM]) (void *key, void *datum, void *datap) =
755 static int filenametr_destroy(void *key, void *datum, void *p)
757 struct filename_trans *ft = key;
765 static int range_tr_destroy(void *key, void *datum, void *p)
767 struct mls_range *rt = datum;
769 ebitmap_destroy(&rt->level[0].cat);
770 ebitmap_destroy(&rt->level[1].cat);
776 static void ocontext_destroy(struct ocontext *c, int i)
781 context_destroy(&c->context[0]);
782 context_destroy(&c->context[1]);
783 if (i == OCON_ISID || i == OCON_FS ||
784 i == OCON_NETIF || i == OCON_FSUSE)
790 * Free any memory allocated by a policy database structure.
792 void policydb_destroy(struct policydb *p)
794 struct ocontext *c, *ctmp;
795 struct genfs *g, *gtmp;
797 struct role_allow *ra, *lra = NULL;
798 struct role_trans *tr, *ltr = NULL;
800 for (i = 0; i < SYM_NUM; i++) {
802 hashtab_map(p->symtab[i].table, destroy_f[i], NULL);
803 hashtab_destroy(p->symtab[i].table);
806 for (i = 0; i < SYM_NUM; i++) {
807 if (p->sym_val_to_name[i])
808 flex_array_free(p->sym_val_to_name[i]);
811 kfree(p->class_val_to_struct);
812 kfree(p->role_val_to_struct);
813 kfree(p->user_val_to_struct);
814 if (p->type_val_to_struct_array)
815 flex_array_free(p->type_val_to_struct_array);
817 avtab_destroy(&p->te_avtab);
819 for (i = 0; i < OCON_NUM; i++) {
825 ocontext_destroy(ctmp, i);
827 p->ocontexts[i] = NULL;
838 ocontext_destroy(ctmp, OCON_FSUSE);
846 cond_policydb_destroy(p);
848 for (tr = p->role_tr; tr; tr = tr->next) {
855 for (ra = p->role_allow; ra; ra = ra->next) {
862 hashtab_map(p->filename_trans, filenametr_destroy, NULL);
863 hashtab_destroy(p->filename_trans);
865 hashtab_map(p->range_tr, range_tr_destroy, NULL);
866 hashtab_destroy(p->range_tr);
868 if (p->type_attr_map_array) {
869 for (i = 0; i < p->p_types.nprim; i++) {
872 e = flex_array_get(p->type_attr_map_array, i);
877 flex_array_free(p->type_attr_map_array);
880 ebitmap_destroy(&p->filename_trans_ttypes);
881 ebitmap_destroy(&p->policycaps);
882 ebitmap_destroy(&p->permissive_map);
888 * Load the initial SIDs specified in a policy database
889 * structure into a SID table.
891 int policydb_load_isids(struct policydb *p, struct sidtab *s)
893 struct ocontext *head, *c;
898 printk(KERN_ERR "SELinux: out of memory on SID table init\n");
902 head = p->ocontexts[OCON_ISID];
903 for (c = head; c; c = c->next) {
905 if (!c->context[0].user) {
906 printk(KERN_ERR "SELinux: SID %s was never defined.\n",
911 rc = sidtab_insert(s, c->sid[0], &c->context[0]);
913 printk(KERN_ERR "SELinux: unable to load initial SID %s.\n",
923 int policydb_class_isvalid(struct policydb *p, unsigned int class)
925 if (!class || class > p->p_classes.nprim)
930 int policydb_role_isvalid(struct policydb *p, unsigned int role)
932 if (!role || role > p->p_roles.nprim)
937 int policydb_type_isvalid(struct policydb *p, unsigned int type)
939 if (!type || type > p->p_types.nprim)
945 * Return 1 if the fields in the security context
946 * structure `c' are valid. Return 0 otherwise.
948 int policydb_context_isvalid(struct policydb *p, struct context *c)
950 struct role_datum *role;
951 struct user_datum *usrdatum;
953 if (!c->role || c->role > p->p_roles.nprim)
956 if (!c->user || c->user > p->p_users.nprim)
959 if (!c->type || c->type > p->p_types.nprim)
962 if (c->role != OBJECT_R_VAL) {
964 * Role must be authorized for the type.
966 role = p->role_val_to_struct[c->role - 1];
967 if (!role || !ebitmap_get_bit(&role->types, c->type - 1))
968 /* role may not be associated with type */
972 * User must be authorized for the role.
974 usrdatum = p->user_val_to_struct[c->user - 1];
978 if (!ebitmap_get_bit(&usrdatum->roles, c->role - 1))
979 /* user may not be associated with role */
983 if (!mls_context_isvalid(p, c))
990 * Read a MLS range structure from a policydb binary
991 * representation file.
993 static int mls_read_range_helper(struct mls_range *r, void *fp)
999 rc = next_entry(buf, fp, sizeof(u32));
1004 items = le32_to_cpu(buf[0]);
1005 if (items > ARRAY_SIZE(buf)) {
1006 printk(KERN_ERR "SELinux: mls: range overflow\n");
1010 rc = next_entry(buf, fp, sizeof(u32) * items);
1012 printk(KERN_ERR "SELinux: mls: truncated range\n");
1016 r->level[0].sens = le32_to_cpu(buf[0]);
1018 r->level[1].sens = le32_to_cpu(buf[1]);
1020 r->level[1].sens = r->level[0].sens;
1022 rc = ebitmap_read(&r->level[0].cat, fp);
1024 printk(KERN_ERR "SELinux: mls: error reading low categories\n");
1028 rc = ebitmap_read(&r->level[1].cat, fp);
1030 printk(KERN_ERR "SELinux: mls: error reading high categories\n");
1034 rc = ebitmap_cpy(&r->level[1].cat, &r->level[0].cat);
1036 printk(KERN_ERR "SELinux: mls: out of memory\n");
1043 ebitmap_destroy(&r->level[0].cat);
1049 * Read and validate a security context structure
1050 * from a policydb binary representation file.
1052 static int context_read_and_validate(struct context *c,
1059 rc = next_entry(buf, fp, sizeof buf);
1061 printk(KERN_ERR "SELinux: context truncated\n");
1064 c->user = le32_to_cpu(buf[0]);
1065 c->role = le32_to_cpu(buf[1]);
1066 c->type = le32_to_cpu(buf[2]);
1067 if (p->policyvers >= POLICYDB_VERSION_MLS) {
1068 rc = mls_read_range_helper(&c->range, fp);
1070 printk(KERN_ERR "SELinux: error reading MLS range of context\n");
1076 if (!policydb_context_isvalid(p, c)) {
1077 printk(KERN_ERR "SELinux: invalid security context\n");
1087 * The following *_read functions are used to
1088 * read the symbol data from a policy database
1089 * binary representation file.
1092 static int str_read(char **strp, gfp_t flags, void *fp, u32 len)
1097 if ((len == 0) || (len == (u32)-1))
1100 str = kmalloc(len + 1, flags);
1104 /* it's expected the caller should free the str */
1107 rc = next_entry(str, fp, len);
1115 static int perm_read(struct policydb *p, struct hashtab *h, void *fp)
1118 struct perm_datum *perdatum;
1124 perdatum = kzalloc(sizeof(*perdatum), GFP_KERNEL);
1128 rc = next_entry(buf, fp, sizeof buf);
1132 len = le32_to_cpu(buf[0]);
1133 perdatum->value = le32_to_cpu(buf[1]);
1135 rc = str_read(&key, GFP_KERNEL, fp, len);
1139 rc = hashtab_insert(h, key, perdatum);
1145 perm_destroy(key, perdatum, NULL);
1149 static int common_read(struct policydb *p, struct hashtab *h, void *fp)
1152 struct common_datum *comdatum;
1158 comdatum = kzalloc(sizeof(*comdatum), GFP_KERNEL);
1162 rc = next_entry(buf, fp, sizeof buf);
1166 len = le32_to_cpu(buf[0]);
1167 comdatum->value = le32_to_cpu(buf[1]);
1169 rc = symtab_init(&comdatum->permissions, PERM_SYMTAB_SIZE);
1172 comdatum->permissions.nprim = le32_to_cpu(buf[2]);
1173 nel = le32_to_cpu(buf[3]);
1175 rc = str_read(&key, GFP_KERNEL, fp, len);
1179 for (i = 0; i < nel; i++) {
1180 rc = perm_read(p, comdatum->permissions.table, fp);
1185 rc = hashtab_insert(h, key, comdatum);
1190 common_destroy(key, comdatum, NULL);
1194 static void type_set_init(struct type_set *t)
1196 ebitmap_init(&t->types);
1197 ebitmap_init(&t->negset);
1200 static int type_set_read(struct type_set *t, void *fp)
1205 if (ebitmap_read(&t->types, fp))
1207 if (ebitmap_read(&t->negset, fp))
1210 rc = next_entry(buf, fp, sizeof(u32));
1213 t->flags = le32_to_cpu(buf[0]);
1219 static int read_cons_helper(struct policydb *p,
1220 struct constraint_node **nodep,
1221 int ncons, int allowxtarget, void *fp)
1223 struct constraint_node *c, *lc;
1224 struct constraint_expr *e, *le;
1227 int rc, i, j, depth;
1230 for (i = 0; i < ncons; i++) {
1231 c = kzalloc(sizeof(*c), GFP_KERNEL);
1240 rc = next_entry(buf, fp, (sizeof(u32) * 2));
1243 c->permissions = le32_to_cpu(buf[0]);
1244 nexpr = le32_to_cpu(buf[1]);
1247 for (j = 0; j < nexpr; j++) {
1248 e = kzalloc(sizeof(*e), GFP_KERNEL);
1257 rc = next_entry(buf, fp, (sizeof(u32) * 3));
1260 e->expr_type = le32_to_cpu(buf[0]);
1261 e->attr = le32_to_cpu(buf[1]);
1262 e->op = le32_to_cpu(buf[2]);
1264 switch (e->expr_type) {
1276 if (depth == (CEXPR_MAXDEPTH - 1))
1281 if (!allowxtarget && (e->attr & CEXPR_XTARGET))
1283 if (depth == (CEXPR_MAXDEPTH - 1))
1286 rc = ebitmap_read(&e->names, fp);
1289 if (p->policyvers >=
1290 POLICYDB_VERSION_CONSTRAINT_NAMES) {
1291 e->type_names = kzalloc(sizeof
1296 type_set_init(e->type_names);
1297 rc = type_set_read(e->type_names, fp);
1315 static int class_read(struct policydb *p, struct hashtab *h, void *fp)
1318 struct class_datum *cladatum;
1320 u32 len, len2, ncons, nel;
1324 cladatum = kzalloc(sizeof(*cladatum), GFP_KERNEL);
1328 rc = next_entry(buf, fp, sizeof(u32)*6);
1332 len = le32_to_cpu(buf[0]);
1333 len2 = le32_to_cpu(buf[1]);
1334 cladatum->value = le32_to_cpu(buf[2]);
1336 rc = symtab_init(&cladatum->permissions, PERM_SYMTAB_SIZE);
1339 cladatum->permissions.nprim = le32_to_cpu(buf[3]);
1340 nel = le32_to_cpu(buf[4]);
1342 ncons = le32_to_cpu(buf[5]);
1344 rc = str_read(&key, GFP_KERNEL, fp, len);
1349 rc = str_read(&cladatum->comkey, GFP_KERNEL, fp, len2);
1354 cladatum->comdatum = hashtab_search(p->p_commons.table, cladatum->comkey);
1355 if (!cladatum->comdatum) {
1356 printk(KERN_ERR "SELinux: unknown common %s\n", cladatum->comkey);
1360 for (i = 0; i < nel; i++) {
1361 rc = perm_read(p, cladatum->permissions.table, fp);
1366 rc = read_cons_helper(p, &cladatum->constraints, ncons, 0, fp);
1370 if (p->policyvers >= POLICYDB_VERSION_VALIDATETRANS) {
1371 /* grab the validatetrans rules */
1372 rc = next_entry(buf, fp, sizeof(u32));
1375 ncons = le32_to_cpu(buf[0]);
1376 rc = read_cons_helper(p, &cladatum->validatetrans,
1382 if (p->policyvers >= POLICYDB_VERSION_NEW_OBJECT_DEFAULTS) {
1383 rc = next_entry(buf, fp, sizeof(u32) * 3);
1387 cladatum->default_user = le32_to_cpu(buf[0]);
1388 cladatum->default_role = le32_to_cpu(buf[1]);
1389 cladatum->default_range = le32_to_cpu(buf[2]);
1392 if (p->policyvers >= POLICYDB_VERSION_DEFAULT_TYPE) {
1393 rc = next_entry(buf, fp, sizeof(u32) * 1);
1396 cladatum->default_type = le32_to_cpu(buf[0]);
1399 rc = hashtab_insert(h, key, cladatum);
1405 cls_destroy(key, cladatum, NULL);
1409 static int role_read(struct policydb *p, struct hashtab *h, void *fp)
1412 struct role_datum *role;
1413 int rc, to_read = 2;
1418 role = kzalloc(sizeof(*role), GFP_KERNEL);
1422 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1425 rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1429 len = le32_to_cpu(buf[0]);
1430 role->value = le32_to_cpu(buf[1]);
1431 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1432 role->bounds = le32_to_cpu(buf[2]);
1434 rc = str_read(&key, GFP_KERNEL, fp, len);
1438 rc = ebitmap_read(&role->dominates, fp);
1442 rc = ebitmap_read(&role->types, fp);
1446 if (strcmp(key, OBJECT_R) == 0) {
1448 if (role->value != OBJECT_R_VAL) {
1449 printk(KERN_ERR "SELinux: Role %s has wrong value %d\n",
1450 OBJECT_R, role->value);
1457 rc = hashtab_insert(h, key, role);
1462 role_destroy(key, role, NULL);
1466 static int type_read(struct policydb *p, struct hashtab *h, void *fp)
1469 struct type_datum *typdatum;
1470 int rc, to_read = 3;
1475 typdatum = kzalloc(sizeof(*typdatum), GFP_KERNEL);
1479 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1482 rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1486 len = le32_to_cpu(buf[0]);
1487 typdatum->value = le32_to_cpu(buf[1]);
1488 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) {
1489 u32 prop = le32_to_cpu(buf[2]);
1491 if (prop & TYPEDATUM_PROPERTY_PRIMARY)
1492 typdatum->primary = 1;
1493 if (prop & TYPEDATUM_PROPERTY_ATTRIBUTE)
1494 typdatum->attribute = 1;
1496 typdatum->bounds = le32_to_cpu(buf[3]);
1498 typdatum->primary = le32_to_cpu(buf[2]);
1501 rc = str_read(&key, GFP_KERNEL, fp, len);
1505 rc = hashtab_insert(h, key, typdatum);
1510 type_destroy(key, typdatum, NULL);
1516 * Read a MLS level structure from a policydb binary
1517 * representation file.
1519 static int mls_read_level(struct mls_level *lp, void *fp)
1524 memset(lp, 0, sizeof(*lp));
1526 rc = next_entry(buf, fp, sizeof buf);
1528 printk(KERN_ERR "SELinux: mls: truncated level\n");
1531 lp->sens = le32_to_cpu(buf[0]);
1533 rc = ebitmap_read(&lp->cat, fp);
1535 printk(KERN_ERR "SELinux: mls: error reading level categories\n");
1541 static int user_read(struct policydb *p, struct hashtab *h, void *fp)
1544 struct user_datum *usrdatum;
1545 int rc, to_read = 2;
1550 usrdatum = kzalloc(sizeof(*usrdatum), GFP_KERNEL);
1554 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1557 rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1561 len = le32_to_cpu(buf[0]);
1562 usrdatum->value = le32_to_cpu(buf[1]);
1563 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1564 usrdatum->bounds = le32_to_cpu(buf[2]);
1566 rc = str_read(&key, GFP_KERNEL, fp, len);
1570 rc = ebitmap_read(&usrdatum->roles, fp);
1574 if (p->policyvers >= POLICYDB_VERSION_MLS) {
1575 rc = mls_read_range_helper(&usrdatum->range, fp);
1578 rc = mls_read_level(&usrdatum->dfltlevel, fp);
1583 rc = hashtab_insert(h, key, usrdatum);
1588 user_destroy(key, usrdatum, NULL);
1592 static int sens_read(struct policydb *p, struct hashtab *h, void *fp)
1595 struct level_datum *levdatum;
1601 levdatum = kzalloc(sizeof(*levdatum), GFP_ATOMIC);
1605 rc = next_entry(buf, fp, sizeof buf);
1609 len = le32_to_cpu(buf[0]);
1610 levdatum->isalias = le32_to_cpu(buf[1]);
1612 rc = str_read(&key, GFP_ATOMIC, fp, len);
1617 levdatum->level = kmalloc(sizeof(struct mls_level), GFP_ATOMIC);
1618 if (!levdatum->level)
1621 rc = mls_read_level(levdatum->level, fp);
1625 rc = hashtab_insert(h, key, levdatum);
1630 sens_destroy(key, levdatum, NULL);
1634 static int cat_read(struct policydb *p, struct hashtab *h, void *fp)
1637 struct cat_datum *catdatum;
1643 catdatum = kzalloc(sizeof(*catdatum), GFP_ATOMIC);
1647 rc = next_entry(buf, fp, sizeof buf);
1651 len = le32_to_cpu(buf[0]);
1652 catdatum->value = le32_to_cpu(buf[1]);
1653 catdatum->isalias = le32_to_cpu(buf[2]);
1655 rc = str_read(&key, GFP_ATOMIC, fp, len);
1659 rc = hashtab_insert(h, key, catdatum);
1664 cat_destroy(key, catdatum, NULL);
1668 static int (*read_f[SYM_NUM]) (struct policydb *p, struct hashtab *h, void *fp) =
1680 static int user_bounds_sanity_check(void *key, void *datum, void *datap)
1682 struct user_datum *upper, *user;
1683 struct policydb *p = datap;
1686 upper = user = datum;
1687 while (upper->bounds) {
1688 struct ebitmap_node *node;
1691 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1692 printk(KERN_ERR "SELinux: user %s: "
1693 "too deep or looped boundary",
1698 upper = p->user_val_to_struct[upper->bounds - 1];
1699 ebitmap_for_each_positive_bit(&user->roles, node, bit) {
1700 if (ebitmap_get_bit(&upper->roles, bit))
1704 "SELinux: boundary violated policy: "
1705 "user=%s role=%s bounds=%s\n",
1706 sym_name(p, SYM_USERS, user->value - 1),
1707 sym_name(p, SYM_ROLES, bit),
1708 sym_name(p, SYM_USERS, upper->value - 1));
1717 static int role_bounds_sanity_check(void *key, void *datum, void *datap)
1719 struct role_datum *upper, *role;
1720 struct policydb *p = datap;
1723 upper = role = datum;
1724 while (upper->bounds) {
1725 struct ebitmap_node *node;
1728 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1729 printk(KERN_ERR "SELinux: role %s: "
1730 "too deep or looped bounds\n",
1735 upper = p->role_val_to_struct[upper->bounds - 1];
1736 ebitmap_for_each_positive_bit(&role->types, node, bit) {
1737 if (ebitmap_get_bit(&upper->types, bit))
1741 "SELinux: boundary violated policy: "
1742 "role=%s type=%s bounds=%s\n",
1743 sym_name(p, SYM_ROLES, role->value - 1),
1744 sym_name(p, SYM_TYPES, bit),
1745 sym_name(p, SYM_ROLES, upper->value - 1));
1754 static int type_bounds_sanity_check(void *key, void *datum, void *datap)
1756 struct type_datum *upper;
1757 struct policydb *p = datap;
1761 while (upper->bounds) {
1762 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1763 printk(KERN_ERR "SELinux: type %s: "
1764 "too deep or looped boundary\n",
1769 upper = flex_array_get_ptr(p->type_val_to_struct_array,
1773 if (upper->attribute) {
1774 printk(KERN_ERR "SELinux: type %s: "
1775 "bounded by attribute %s",
1777 sym_name(p, SYM_TYPES, upper->value - 1));
1785 static int policydb_bounds_sanity_check(struct policydb *p)
1789 if (p->policyvers < POLICYDB_VERSION_BOUNDARY)
1792 rc = hashtab_map(p->p_users.table,
1793 user_bounds_sanity_check, p);
1797 rc = hashtab_map(p->p_roles.table,
1798 role_bounds_sanity_check, p);
1802 rc = hashtab_map(p->p_types.table,
1803 type_bounds_sanity_check, p);
1810 u16 string_to_security_class(struct policydb *p, const char *name)
1812 struct class_datum *cladatum;
1814 cladatum = hashtab_search(p->p_classes.table, name);
1818 return cladatum->value;
1821 u32 string_to_av_perm(struct policydb *p, u16 tclass, const char *name)
1823 struct class_datum *cladatum;
1824 struct perm_datum *perdatum = NULL;
1825 struct common_datum *comdatum;
1827 if (!tclass || tclass > p->p_classes.nprim)
1830 cladatum = p->class_val_to_struct[tclass-1];
1831 comdatum = cladatum->comdatum;
1833 perdatum = hashtab_search(comdatum->permissions.table,
1836 perdatum = hashtab_search(cladatum->permissions.table,
1841 return 1U << (perdatum->value-1);
1844 static int range_read(struct policydb *p, void *fp)
1846 struct range_trans *rt = NULL;
1847 struct mls_range *r = NULL;
1852 if (p->policyvers < POLICYDB_VERSION_MLS)
1855 rc = next_entry(buf, fp, sizeof(u32));
1859 nel = le32_to_cpu(buf[0]);
1860 for (i = 0; i < nel; i++) {
1862 rt = kzalloc(sizeof(*rt), GFP_KERNEL);
1866 rc = next_entry(buf, fp, (sizeof(u32) * 2));
1870 rt->source_type = le32_to_cpu(buf[0]);
1871 rt->target_type = le32_to_cpu(buf[1]);
1872 if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) {
1873 rc = next_entry(buf, fp, sizeof(u32));
1876 rt->target_class = le32_to_cpu(buf[0]);
1878 rt->target_class = p->process_class;
1881 if (!policydb_type_isvalid(p, rt->source_type) ||
1882 !policydb_type_isvalid(p, rt->target_type) ||
1883 !policydb_class_isvalid(p, rt->target_class))
1887 r = kzalloc(sizeof(*r), GFP_KERNEL);
1891 rc = mls_read_range_helper(r, fp);
1896 if (!mls_range_isvalid(p, r)) {
1897 printk(KERN_WARNING "SELinux: rangetrans: invalid range\n");
1901 rc = hashtab_insert(p->range_tr, rt, r);
1908 hash_eval(p->range_tr, "rangetr");
1916 static int filename_trans_read(struct policydb *p, void *fp)
1918 struct filename_trans *ft;
1919 struct filename_trans_datum *otype;
1925 if (p->policyvers < POLICYDB_VERSION_FILENAME_TRANS)
1928 rc = next_entry(buf, fp, sizeof(u32));
1931 nel = le32_to_cpu(buf[0]);
1933 for (i = 0; i < nel; i++) {
1939 ft = kzalloc(sizeof(*ft), GFP_KERNEL);
1944 otype = kmalloc(sizeof(*otype), GFP_KERNEL);
1948 /* length of the path component string */
1949 rc = next_entry(buf, fp, sizeof(u32));
1952 len = le32_to_cpu(buf[0]);
1954 /* path component string */
1955 rc = str_read(&name, GFP_KERNEL, fp, len);
1961 rc = next_entry(buf, fp, sizeof(u32) * 4);
1965 ft->stype = le32_to_cpu(buf[0]);
1966 ft->ttype = le32_to_cpu(buf[1]);
1967 ft->tclass = le32_to_cpu(buf[2]);
1969 otype->otype = le32_to_cpu(buf[3]);
1971 rc = ebitmap_set_bit(&p->filename_trans_ttypes, ft->ttype, 1);
1975 rc = hashtab_insert(p->filename_trans, ft, otype);
1978 * Do not return -EEXIST to the caller, or the system
1983 /* But free memory to avoid memory leak. */
1989 hash_eval(p->filename_trans, "filenametr");
1999 static int genfs_read(struct policydb *p, void *fp)
2002 u32 nel, nel2, len, len2;
2004 struct ocontext *l, *c;
2005 struct ocontext *newc = NULL;
2006 struct genfs *genfs_p, *genfs;
2007 struct genfs *newgenfs = NULL;
2009 rc = next_entry(buf, fp, sizeof(u32));
2012 nel = le32_to_cpu(buf[0]);
2014 for (i = 0; i < nel; i++) {
2015 rc = next_entry(buf, fp, sizeof(u32));
2018 len = le32_to_cpu(buf[0]);
2021 newgenfs = kzalloc(sizeof(*newgenfs), GFP_KERNEL);
2025 rc = str_read(&newgenfs->fstype, GFP_KERNEL, fp, len);
2029 for (genfs_p = NULL, genfs = p->genfs; genfs;
2030 genfs_p = genfs, genfs = genfs->next) {
2032 if (strcmp(newgenfs->fstype, genfs->fstype) == 0) {
2033 printk(KERN_ERR "SELinux: dup genfs fstype %s\n",
2037 if (strcmp(newgenfs->fstype, genfs->fstype) < 0)
2040 newgenfs->next = genfs;
2042 genfs_p->next = newgenfs;
2044 p->genfs = newgenfs;
2048 rc = next_entry(buf, fp, sizeof(u32));
2052 nel2 = le32_to_cpu(buf[0]);
2053 for (j = 0; j < nel2; j++) {
2054 rc = next_entry(buf, fp, sizeof(u32));
2057 len = le32_to_cpu(buf[0]);
2060 newc = kzalloc(sizeof(*newc), GFP_KERNEL);
2064 rc = str_read(&newc->u.name, GFP_KERNEL, fp, len);
2068 rc = next_entry(buf, fp, sizeof(u32));
2072 newc->v.sclass = le32_to_cpu(buf[0]);
2073 rc = context_read_and_validate(&newc->context[0], p, fp);
2077 for (l = NULL, c = genfs->head; c;
2078 l = c, c = c->next) {
2080 if (!strcmp(newc->u.name, c->u.name) &&
2081 (!c->v.sclass || !newc->v.sclass ||
2082 newc->v.sclass == c->v.sclass)) {
2083 printk(KERN_ERR "SELinux: dup genfs entry (%s,%s)\n",
2084 genfs->fstype, c->u.name);
2087 len = strlen(newc->u.name);
2088 len2 = strlen(c->u.name);
2104 kfree(newgenfs->fstype);
2106 ocontext_destroy(newc, OCON_FSUSE);
2111 static int ocontext_read(struct policydb *p, struct policydb_compat_info *info,
2117 struct ocontext *l, *c;
2120 for (i = 0; i < info->ocon_num; i++) {
2121 rc = next_entry(buf, fp, sizeof(u32));
2124 nel = le32_to_cpu(buf[0]);
2127 for (j = 0; j < nel; j++) {
2129 c = kzalloc(sizeof(*c), GFP_KERNEL);
2135 p->ocontexts[i] = c;
2140 rc = next_entry(buf, fp, sizeof(u32));
2144 c->sid[0] = le32_to_cpu(buf[0]);
2145 rc = context_read_and_validate(&c->context[0], p, fp);
2151 rc = next_entry(buf, fp, sizeof(u32));
2154 len = le32_to_cpu(buf[0]);
2156 rc = str_read(&c->u.name, GFP_KERNEL, fp, len);
2160 rc = context_read_and_validate(&c->context[0], p, fp);
2163 rc = context_read_and_validate(&c->context[1], p, fp);
2168 rc = next_entry(buf, fp, sizeof(u32)*3);
2171 c->u.port.protocol = le32_to_cpu(buf[0]);
2172 c->u.port.low_port = le32_to_cpu(buf[1]);
2173 c->u.port.high_port = le32_to_cpu(buf[2]);
2174 rc = context_read_and_validate(&c->context[0], p, fp);
2179 rc = next_entry(nodebuf, fp, sizeof(u32) * 2);
2182 c->u.node.addr = nodebuf[0]; /* network order */
2183 c->u.node.mask = nodebuf[1]; /* network order */
2184 rc = context_read_and_validate(&c->context[0], p, fp);
2189 rc = next_entry(buf, fp, sizeof(u32)*2);
2194 c->v.behavior = le32_to_cpu(buf[0]);
2195 /* Determined at runtime, not in policy DB. */
2196 if (c->v.behavior == SECURITY_FS_USE_MNTPOINT)
2198 if (c->v.behavior > SECURITY_FS_USE_MAX)
2201 len = le32_to_cpu(buf[1]);
2202 rc = str_read(&c->u.name, GFP_KERNEL, fp, len);
2206 rc = context_read_and_validate(&c->context[0], p, fp);
2213 rc = next_entry(nodebuf, fp, sizeof(u32) * 8);
2216 for (k = 0; k < 4; k++)
2217 c->u.node6.addr[k] = nodebuf[k];
2218 for (k = 0; k < 4; k++)
2219 c->u.node6.mask[k] = nodebuf[k+4];
2220 rc = context_read_and_validate(&c->context[0], p, fp);
2234 * Read the configuration data from a policy database binary
2235 * representation file into a policy database structure.
2237 int policydb_read(struct policydb *p, void *fp)
2239 struct role_allow *ra, *lra;
2240 struct role_trans *tr, *ltr;
2243 u32 len, nprim, nel;
2246 struct policydb_compat_info *info;
2248 rc = policydb_init(p);
2252 /* Read the magic number and string length. */
2253 rc = next_entry(buf, fp, sizeof(u32) * 2);
2258 if (le32_to_cpu(buf[0]) != POLICYDB_MAGIC) {
2259 printk(KERN_ERR "SELinux: policydb magic number 0x%x does "
2260 "not match expected magic number 0x%x\n",
2261 le32_to_cpu(buf[0]), POLICYDB_MAGIC);
2266 len = le32_to_cpu(buf[1]);
2267 if (len != strlen(POLICYDB_STRING)) {
2268 printk(KERN_ERR "SELinux: policydb string length %d does not "
2269 "match expected length %Zu\n",
2270 len, strlen(POLICYDB_STRING));
2275 policydb_str = kmalloc(len + 1, GFP_KERNEL);
2276 if (!policydb_str) {
2277 printk(KERN_ERR "SELinux: unable to allocate memory for policydb "
2278 "string of length %d\n", len);
2282 rc = next_entry(policydb_str, fp, len);
2284 printk(KERN_ERR "SELinux: truncated policydb string identifier\n");
2285 kfree(policydb_str);
2290 policydb_str[len] = '\0';
2291 if (strcmp(policydb_str, POLICYDB_STRING)) {
2292 printk(KERN_ERR "SELinux: policydb string %s does not match "
2293 "my string %s\n", policydb_str, POLICYDB_STRING);
2294 kfree(policydb_str);
2297 /* Done with policydb_str. */
2298 kfree(policydb_str);
2299 policydb_str = NULL;
2301 /* Read the version and table sizes. */
2302 rc = next_entry(buf, fp, sizeof(u32)*4);
2307 p->policyvers = le32_to_cpu(buf[0]);
2308 if (p->policyvers < POLICYDB_VERSION_MIN ||
2309 p->policyvers > POLICYDB_VERSION_MAX) {
2310 printk(KERN_ERR "SELinux: policydb version %d does not match "
2311 "my version range %d-%d\n",
2312 le32_to_cpu(buf[0]), POLICYDB_VERSION_MIN, POLICYDB_VERSION_MAX);
2316 if ((le32_to_cpu(buf[1]) & POLICYDB_CONFIG_MLS)) {
2320 if (p->policyvers < POLICYDB_VERSION_MLS) {
2321 printk(KERN_ERR "SELinux: security policydb version %d "
2322 "(MLS) not backwards compatible\n",
2327 p->reject_unknown = !!(le32_to_cpu(buf[1]) & REJECT_UNKNOWN);
2328 p->allow_unknown = !!(le32_to_cpu(buf[1]) & ALLOW_UNKNOWN);
2330 if (p->policyvers >= POLICYDB_VERSION_POLCAP) {
2331 rc = ebitmap_read(&p->policycaps, fp);
2336 if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE) {
2337 rc = ebitmap_read(&p->permissive_map, fp);
2343 info = policydb_lookup_compat(p->policyvers);
2345 printk(KERN_ERR "SELinux: unable to find policy compat info "
2346 "for version %d\n", p->policyvers);
2351 if (le32_to_cpu(buf[2]) != info->sym_num ||
2352 le32_to_cpu(buf[3]) != info->ocon_num) {
2353 printk(KERN_ERR "SELinux: policydb table sizes (%d,%d) do "
2354 "not match mine (%d,%d)\n", le32_to_cpu(buf[2]),
2355 le32_to_cpu(buf[3]),
2356 info->sym_num, info->ocon_num);
2360 for (i = 0; i < info->sym_num; i++) {
2361 rc = next_entry(buf, fp, sizeof(u32)*2);
2364 nprim = le32_to_cpu(buf[0]);
2365 nel = le32_to_cpu(buf[1]);
2366 for (j = 0; j < nel; j++) {
2367 rc = read_f[i](p, p->symtab[i].table, fp);
2372 p->symtab[i].nprim = nprim;
2376 p->process_class = string_to_security_class(p, "process");
2377 if (!p->process_class)
2380 rc = avtab_read(&p->te_avtab, fp, p);
2384 if (p->policyvers >= POLICYDB_VERSION_BOOL) {
2385 rc = cond_read_list(p, fp);
2390 rc = next_entry(buf, fp, sizeof(u32));
2393 nel = le32_to_cpu(buf[0]);
2395 for (i = 0; i < nel; i++) {
2397 tr = kzalloc(sizeof(*tr), GFP_KERNEL);
2404 rc = next_entry(buf, fp, sizeof(u32)*3);
2409 tr->role = le32_to_cpu(buf[0]);
2410 tr->type = le32_to_cpu(buf[1]);
2411 tr->new_role = le32_to_cpu(buf[2]);
2412 if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) {
2413 rc = next_entry(buf, fp, sizeof(u32));
2416 tr->tclass = le32_to_cpu(buf[0]);
2418 tr->tclass = p->process_class;
2421 if (!policydb_role_isvalid(p, tr->role) ||
2422 !policydb_type_isvalid(p, tr->type) ||
2423 !policydb_class_isvalid(p, tr->tclass) ||
2424 !policydb_role_isvalid(p, tr->new_role))
2429 rc = next_entry(buf, fp, sizeof(u32));
2432 nel = le32_to_cpu(buf[0]);
2434 for (i = 0; i < nel; i++) {
2436 ra = kzalloc(sizeof(*ra), GFP_KERNEL);
2443 rc = next_entry(buf, fp, sizeof(u32)*2);
2448 ra->role = le32_to_cpu(buf[0]);
2449 ra->new_role = le32_to_cpu(buf[1]);
2450 if (!policydb_role_isvalid(p, ra->role) ||
2451 !policydb_role_isvalid(p, ra->new_role))
2456 rc = filename_trans_read(p, fp);
2460 rc = policydb_index(p);
2465 p->process_trans_perms = string_to_av_perm(p, p->process_class, "transition");
2466 p->process_trans_perms |= string_to_av_perm(p, p->process_class, "dyntransition");
2467 if (!p->process_trans_perms)
2470 rc = ocontext_read(p, info, fp);
2474 rc = genfs_read(p, fp);
2478 rc = range_read(p, fp);
2483 p->type_attr_map_array = flex_array_alloc(sizeof(struct ebitmap),
2485 GFP_KERNEL | __GFP_ZERO);
2486 if (!p->type_attr_map_array)
2489 /* preallocate so we don't have to worry about the put ever failing */
2490 rc = flex_array_prealloc(p->type_attr_map_array, 0, p->p_types.nprim,
2491 GFP_KERNEL | __GFP_ZERO);
2495 for (i = 0; i < p->p_types.nprim; i++) {
2496 struct ebitmap *e = flex_array_get(p->type_attr_map_array, i);
2500 if (p->policyvers >= POLICYDB_VERSION_AVTAB) {
2501 rc = ebitmap_read(e, fp);
2505 /* add the type itself as the degenerate case */
2506 rc = ebitmap_set_bit(e, i, 1);
2511 rc = policydb_bounds_sanity_check(p);
2519 policydb_destroy(p);
2524 * Write a MLS level structure to a policydb binary
2525 * representation file.
2527 static int mls_write_level(struct mls_level *l, void *fp)
2532 buf[0] = cpu_to_le32(l->sens);
2533 rc = put_entry(buf, sizeof(u32), 1, fp);
2537 rc = ebitmap_write(&l->cat, fp);
2545 * Write a MLS range structure to a policydb binary
2546 * representation file.
2548 static int mls_write_range_helper(struct mls_range *r, void *fp)
2554 eq = mls_level_eq(&r->level[1], &r->level[0]);
2560 buf[0] = cpu_to_le32(items-1);
2561 buf[1] = cpu_to_le32(r->level[0].sens);
2563 buf[2] = cpu_to_le32(r->level[1].sens);
2565 BUG_ON(items > ARRAY_SIZE(buf));
2567 rc = put_entry(buf, sizeof(u32), items, fp);
2571 rc = ebitmap_write(&r->level[0].cat, fp);
2575 rc = ebitmap_write(&r->level[1].cat, fp);
2583 static int sens_write(void *vkey, void *datum, void *ptr)
2586 struct level_datum *levdatum = datum;
2587 struct policy_data *pd = ptr;
2594 buf[0] = cpu_to_le32(len);
2595 buf[1] = cpu_to_le32(levdatum->isalias);
2596 rc = put_entry(buf, sizeof(u32), 2, fp);
2600 rc = put_entry(key, 1, len, fp);
2604 rc = mls_write_level(levdatum->level, fp);
2611 static int cat_write(void *vkey, void *datum, void *ptr)
2614 struct cat_datum *catdatum = datum;
2615 struct policy_data *pd = ptr;
2622 buf[0] = cpu_to_le32(len);
2623 buf[1] = cpu_to_le32(catdatum->value);
2624 buf[2] = cpu_to_le32(catdatum->isalias);
2625 rc = put_entry(buf, sizeof(u32), 3, fp);
2629 rc = put_entry(key, 1, len, fp);
2636 static int role_trans_write(struct policydb *p, void *fp)
2638 struct role_trans *r = p->role_tr;
2639 struct role_trans *tr;
2645 for (tr = r; tr; tr = tr->next)
2647 buf[0] = cpu_to_le32(nel);
2648 rc = put_entry(buf, sizeof(u32), 1, fp);
2651 for (tr = r; tr; tr = tr->next) {
2652 buf[0] = cpu_to_le32(tr->role);
2653 buf[1] = cpu_to_le32(tr->type);
2654 buf[2] = cpu_to_le32(tr->new_role);
2655 rc = put_entry(buf, sizeof(u32), 3, fp);
2658 if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) {
2659 buf[0] = cpu_to_le32(tr->tclass);
2660 rc = put_entry(buf, sizeof(u32), 1, fp);
2669 static int role_allow_write(struct role_allow *r, void *fp)
2671 struct role_allow *ra;
2677 for (ra = r; ra; ra = ra->next)
2679 buf[0] = cpu_to_le32(nel);
2680 rc = put_entry(buf, sizeof(u32), 1, fp);
2683 for (ra = r; ra; ra = ra->next) {
2684 buf[0] = cpu_to_le32(ra->role);
2685 buf[1] = cpu_to_le32(ra->new_role);
2686 rc = put_entry(buf, sizeof(u32), 2, fp);
2694 * Write a security context structure
2695 * to a policydb binary representation file.
2697 static int context_write(struct policydb *p, struct context *c,
2703 buf[0] = cpu_to_le32(c->user);
2704 buf[1] = cpu_to_le32(c->role);
2705 buf[2] = cpu_to_le32(c->type);
2707 rc = put_entry(buf, sizeof(u32), 3, fp);
2711 rc = mls_write_range_helper(&c->range, fp);
2719 * The following *_write functions are used to
2720 * write the symbol data to a policy database
2721 * binary representation file.
2724 static int perm_write(void *vkey, void *datum, void *fp)
2727 struct perm_datum *perdatum = datum;
2733 buf[0] = cpu_to_le32(len);
2734 buf[1] = cpu_to_le32(perdatum->value);
2735 rc = put_entry(buf, sizeof(u32), 2, fp);
2739 rc = put_entry(key, 1, len, fp);
2746 static int common_write(void *vkey, void *datum, void *ptr)
2749 struct common_datum *comdatum = datum;
2750 struct policy_data *pd = ptr;
2757 buf[0] = cpu_to_le32(len);
2758 buf[1] = cpu_to_le32(comdatum->value);
2759 buf[2] = cpu_to_le32(comdatum->permissions.nprim);
2760 buf[3] = cpu_to_le32(comdatum->permissions.table->nel);
2761 rc = put_entry(buf, sizeof(u32), 4, fp);
2765 rc = put_entry(key, 1, len, fp);
2769 rc = hashtab_map(comdatum->permissions.table, perm_write, fp);
2776 static int type_set_write(struct type_set *t, void *fp)
2781 if (ebitmap_write(&t->types, fp))
2783 if (ebitmap_write(&t->negset, fp))
2786 buf[0] = cpu_to_le32(t->flags);
2787 rc = put_entry(buf, sizeof(u32), 1, fp);
2794 static int write_cons_helper(struct policydb *p, struct constraint_node *node,
2797 struct constraint_node *c;
2798 struct constraint_expr *e;
2803 for (c = node; c; c = c->next) {
2805 for (e = c->expr; e; e = e->next)
2807 buf[0] = cpu_to_le32(c->permissions);
2808 buf[1] = cpu_to_le32(nel);
2809 rc = put_entry(buf, sizeof(u32), 2, fp);
2812 for (e = c->expr; e; e = e->next) {
2813 buf[0] = cpu_to_le32(e->expr_type);
2814 buf[1] = cpu_to_le32(e->attr);
2815 buf[2] = cpu_to_le32(e->op);
2816 rc = put_entry(buf, sizeof(u32), 3, fp);
2820 switch (e->expr_type) {
2822 rc = ebitmap_write(&e->names, fp);
2825 if (p->policyvers >=
2826 POLICYDB_VERSION_CONSTRAINT_NAMES) {
2827 rc = type_set_write(e->type_names, fp);
2841 static int class_write(void *vkey, void *datum, void *ptr)
2844 struct class_datum *cladatum = datum;
2845 struct policy_data *pd = ptr;
2847 struct policydb *p = pd->p;
2848 struct constraint_node *c;
2855 if (cladatum->comkey)
2856 len2 = strlen(cladatum->comkey);
2861 for (c = cladatum->constraints; c; c = c->next)
2864 buf[0] = cpu_to_le32(len);
2865 buf[1] = cpu_to_le32(len2);
2866 buf[2] = cpu_to_le32(cladatum->value);
2867 buf[3] = cpu_to_le32(cladatum->permissions.nprim);
2868 if (cladatum->permissions.table)
2869 buf[4] = cpu_to_le32(cladatum->permissions.table->nel);
2872 buf[5] = cpu_to_le32(ncons);
2873 rc = put_entry(buf, sizeof(u32), 6, fp);
2877 rc = put_entry(key, 1, len, fp);
2881 if (cladatum->comkey) {
2882 rc = put_entry(cladatum->comkey, 1, len2, fp);
2887 rc = hashtab_map(cladatum->permissions.table, perm_write, fp);
2891 rc = write_cons_helper(p, cladatum->constraints, fp);
2895 /* write out the validatetrans rule */
2897 for (c = cladatum->validatetrans; c; c = c->next)
2900 buf[0] = cpu_to_le32(ncons);
2901 rc = put_entry(buf, sizeof(u32), 1, fp);
2905 rc = write_cons_helper(p, cladatum->validatetrans, fp);
2909 if (p->policyvers >= POLICYDB_VERSION_NEW_OBJECT_DEFAULTS) {
2910 buf[0] = cpu_to_le32(cladatum->default_user);
2911 buf[1] = cpu_to_le32(cladatum->default_role);
2912 buf[2] = cpu_to_le32(cladatum->default_range);
2914 rc = put_entry(buf, sizeof(uint32_t), 3, fp);
2919 if (p->policyvers >= POLICYDB_VERSION_DEFAULT_TYPE) {
2920 buf[0] = cpu_to_le32(cladatum->default_type);
2921 rc = put_entry(buf, sizeof(uint32_t), 1, fp);
2929 static int role_write(void *vkey, void *datum, void *ptr)
2932 struct role_datum *role = datum;
2933 struct policy_data *pd = ptr;
2935 struct policydb *p = pd->p;
2942 buf[items++] = cpu_to_le32(len);
2943 buf[items++] = cpu_to_le32(role->value);
2944 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
2945 buf[items++] = cpu_to_le32(role->bounds);
2947 BUG_ON(items > ARRAY_SIZE(buf));
2949 rc = put_entry(buf, sizeof(u32), items, fp);
2953 rc = put_entry(key, 1, len, fp);
2957 rc = ebitmap_write(&role->dominates, fp);
2961 rc = ebitmap_write(&role->types, fp);
2968 static int type_write(void *vkey, void *datum, void *ptr)
2971 struct type_datum *typdatum = datum;
2972 struct policy_data *pd = ptr;
2973 struct policydb *p = pd->p;
2981 buf[items++] = cpu_to_le32(len);
2982 buf[items++] = cpu_to_le32(typdatum->value);
2983 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) {
2986 if (typdatum->primary)
2987 properties |= TYPEDATUM_PROPERTY_PRIMARY;
2989 if (typdatum->attribute)
2990 properties |= TYPEDATUM_PROPERTY_ATTRIBUTE;
2992 buf[items++] = cpu_to_le32(properties);
2993 buf[items++] = cpu_to_le32(typdatum->bounds);
2995 buf[items++] = cpu_to_le32(typdatum->primary);
2997 BUG_ON(items > ARRAY_SIZE(buf));
2998 rc = put_entry(buf, sizeof(u32), items, fp);
3002 rc = put_entry(key, 1, len, fp);
3009 static int user_write(void *vkey, void *datum, void *ptr)
3012 struct user_datum *usrdatum = datum;
3013 struct policy_data *pd = ptr;
3014 struct policydb *p = pd->p;
3022 buf[items++] = cpu_to_le32(len);
3023 buf[items++] = cpu_to_le32(usrdatum->value);
3024 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
3025 buf[items++] = cpu_to_le32(usrdatum->bounds);
3026 BUG_ON(items > ARRAY_SIZE(buf));
3027 rc = put_entry(buf, sizeof(u32), items, fp);
3031 rc = put_entry(key, 1, len, fp);
3035 rc = ebitmap_write(&usrdatum->roles, fp);
3039 rc = mls_write_range_helper(&usrdatum->range, fp);
3043 rc = mls_write_level(&usrdatum->dfltlevel, fp);
3050 static int (*write_f[SYM_NUM]) (void *key, void *datum,
3063 static int ocontext_write(struct policydb *p, struct policydb_compat_info *info,
3066 unsigned int i, j, rc;
3071 for (i = 0; i < info->ocon_num; i++) {
3073 for (c = p->ocontexts[i]; c; c = c->next)
3075 buf[0] = cpu_to_le32(nel);
3076 rc = put_entry(buf, sizeof(u32), 1, fp);
3079 for (c = p->ocontexts[i]; c; c = c->next) {
3082 buf[0] = cpu_to_le32(c->sid[0]);
3083 rc = put_entry(buf, sizeof(u32), 1, fp);
3086 rc = context_write(p, &c->context[0], fp);
3092 len = strlen(c->u.name);
3093 buf[0] = cpu_to_le32(len);
3094 rc = put_entry(buf, sizeof(u32), 1, fp);
3097 rc = put_entry(c->u.name, 1, len, fp);
3100 rc = context_write(p, &c->context[0], fp);
3103 rc = context_write(p, &c->context[1], fp);
3108 buf[0] = cpu_to_le32(c->u.port.protocol);
3109 buf[1] = cpu_to_le32(c->u.port.low_port);
3110 buf[2] = cpu_to_le32(c->u.port.high_port);
3111 rc = put_entry(buf, sizeof(u32), 3, fp);
3114 rc = context_write(p, &c->context[0], fp);
3119 nodebuf[0] = c->u.node.addr; /* network order */
3120 nodebuf[1] = c->u.node.mask; /* network order */
3121 rc = put_entry(nodebuf, sizeof(u32), 2, fp);
3124 rc = context_write(p, &c->context[0], fp);
3129 buf[0] = cpu_to_le32(c->v.behavior);
3130 len = strlen(c->u.name);
3131 buf[1] = cpu_to_le32(len);
3132 rc = put_entry(buf, sizeof(u32), 2, fp);
3135 rc = put_entry(c->u.name, 1, len, fp);
3138 rc = context_write(p, &c->context[0], fp);
3143 for (j = 0; j < 4; j++)
3144 nodebuf[j] = c->u.node6.addr[j]; /* network order */
3145 for (j = 0; j < 4; j++)
3146 nodebuf[j + 4] = c->u.node6.mask[j]; /* network order */
3147 rc = put_entry(nodebuf, sizeof(u32), 8, fp);
3150 rc = context_write(p, &c->context[0], fp);
3160 static int genfs_write(struct policydb *p, void *fp)
3162 struct genfs *genfs;
3169 for (genfs = p->genfs; genfs; genfs = genfs->next)
3171 buf[0] = cpu_to_le32(len);
3172 rc = put_entry(buf, sizeof(u32), 1, fp);
3175 for (genfs = p->genfs; genfs; genfs = genfs->next) {
3176 len = strlen(genfs->fstype);
3177 buf[0] = cpu_to_le32(len);
3178 rc = put_entry(buf, sizeof(u32), 1, fp);
3181 rc = put_entry(genfs->fstype, 1, len, fp);
3185 for (c = genfs->head; c; c = c->next)
3187 buf[0] = cpu_to_le32(len);
3188 rc = put_entry(buf, sizeof(u32), 1, fp);
3191 for (c = genfs->head; c; c = c->next) {
3192 len = strlen(c->u.name);
3193 buf[0] = cpu_to_le32(len);
3194 rc = put_entry(buf, sizeof(u32), 1, fp);
3197 rc = put_entry(c->u.name, 1, len, fp);
3200 buf[0] = cpu_to_le32(c->v.sclass);
3201 rc = put_entry(buf, sizeof(u32), 1, fp);
3204 rc = context_write(p, &c->context[0], fp);
3212 static int hashtab_cnt(void *key, void *data, void *ptr)
3220 static int range_write_helper(void *key, void *data, void *ptr)
3223 struct range_trans *rt = key;
3224 struct mls_range *r = data;
3225 struct policy_data *pd = ptr;
3227 struct policydb *p = pd->p;
3230 buf[0] = cpu_to_le32(rt->source_type);
3231 buf[1] = cpu_to_le32(rt->target_type);
3232 rc = put_entry(buf, sizeof(u32), 2, fp);
3235 if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) {
3236 buf[0] = cpu_to_le32(rt->target_class);
3237 rc = put_entry(buf, sizeof(u32), 1, fp);
3241 rc = mls_write_range_helper(r, fp);
3248 static int range_write(struct policydb *p, void *fp)
3252 struct policy_data pd;
3257 /* count the number of entries in the hashtab */
3259 rc = hashtab_map(p->range_tr, hashtab_cnt, &nel);
3263 buf[0] = cpu_to_le32(nel);
3264 rc = put_entry(buf, sizeof(u32), 1, fp);
3268 /* actually write all of the entries */
3269 rc = hashtab_map(p->range_tr, range_write_helper, &pd);
3276 static int filename_write_helper(void *key, void *data, void *ptr)
3279 struct filename_trans *ft = key;
3280 struct filename_trans_datum *otype = data;
3285 len = strlen(ft->name);
3286 buf[0] = cpu_to_le32(len);
3287 rc = put_entry(buf, sizeof(u32), 1, fp);
3291 rc = put_entry(ft->name, sizeof(char), len, fp);
3295 buf[0] = cpu_to_le32(ft->stype);
3296 buf[1] = cpu_to_le32(ft->ttype);
3297 buf[2] = cpu_to_le32(ft->tclass);
3298 buf[3] = cpu_to_le32(otype->otype);
3300 rc = put_entry(buf, sizeof(u32), 4, fp);
3307 static int filename_trans_write(struct policydb *p, void *fp)
3313 if (p->policyvers < POLICYDB_VERSION_FILENAME_TRANS)
3317 rc = hashtab_map(p->filename_trans, hashtab_cnt, &nel);
3321 buf[0] = cpu_to_le32(nel);
3322 rc = put_entry(buf, sizeof(u32), 1, fp);
3326 rc = hashtab_map(p->filename_trans, filename_write_helper, fp);
3334 * Write the configuration data in a policy database
3335 * structure to a policy database binary representation
3338 int policydb_write(struct policydb *p, void *fp)
3340 unsigned int i, num_syms;
3345 struct policydb_compat_info *info;
3348 * refuse to write policy older than compressed avtab
3349 * to simplify the writer. There are other tests dropped
3350 * since we assume this throughout the writer code. Be
3351 * careful if you ever try to remove this restriction
3353 if (p->policyvers < POLICYDB_VERSION_AVTAB) {
3354 printk(KERN_ERR "SELinux: refusing to write policy version %d."
3355 " Because it is less than version %d\n", p->policyvers,
3356 POLICYDB_VERSION_AVTAB);
3362 config |= POLICYDB_CONFIG_MLS;
3364 if (p->reject_unknown)
3365 config |= REJECT_UNKNOWN;
3366 if (p->allow_unknown)
3367 config |= ALLOW_UNKNOWN;
3369 /* Write the magic number and string identifiers. */
3370 buf[0] = cpu_to_le32(POLICYDB_MAGIC);
3371 len = strlen(POLICYDB_STRING);
3372 buf[1] = cpu_to_le32(len);
3373 rc = put_entry(buf, sizeof(u32), 2, fp);
3376 rc = put_entry(POLICYDB_STRING, 1, len, fp);
3380 /* Write the version, config, and table sizes. */
3381 info = policydb_lookup_compat(p->policyvers);
3383 printk(KERN_ERR "SELinux: compatibility lookup failed for policy "
3384 "version %d", p->policyvers);
3388 buf[0] = cpu_to_le32(p->policyvers);
3389 buf[1] = cpu_to_le32(config);
3390 buf[2] = cpu_to_le32(info->sym_num);
3391 buf[3] = cpu_to_le32(info->ocon_num);
3393 rc = put_entry(buf, sizeof(u32), 4, fp);
3397 if (p->policyvers >= POLICYDB_VERSION_POLCAP) {
3398 rc = ebitmap_write(&p->policycaps, fp);
3403 if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE) {
3404 rc = ebitmap_write(&p->permissive_map, fp);
3409 num_syms = info->sym_num;
3410 for (i = 0; i < num_syms; i++) {
3411 struct policy_data pd;
3416 buf[0] = cpu_to_le32(p->symtab[i].nprim);
3417 buf[1] = cpu_to_le32(p->symtab[i].table->nel);
3419 rc = put_entry(buf, sizeof(u32), 2, fp);
3422 rc = hashtab_map(p->symtab[i].table, write_f[i], &pd);
3427 rc = avtab_write(p, &p->te_avtab, fp);
3431 rc = cond_write_list(p, p->cond_list, fp);
3435 rc = role_trans_write(p, fp);
3439 rc = role_allow_write(p->role_allow, fp);
3443 rc = filename_trans_write(p, fp);
3447 rc = ocontext_write(p, info, fp);
3451 rc = genfs_write(p, fp);
3455 rc = range_write(p, fp);
3459 for (i = 0; i < p->p_types.nprim; i++) {
3460 struct ebitmap *e = flex_array_get(p->type_attr_map_array, i);
3463 rc = ebitmap_write(e, fp);