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,
153 static struct policydb_compat_info *policydb_lookup_compat(int version)
156 struct policydb_compat_info *info = NULL;
158 for (i = 0; i < ARRAY_SIZE(policydb_compat); i++) {
159 if (policydb_compat[i].version == version) {
160 info = &policydb_compat[i];
168 * Initialize the role table.
170 static int roles_init(struct policydb *p)
174 struct role_datum *role;
177 role = kzalloc(sizeof(*role), GFP_KERNEL);
182 role->value = ++p->p_roles.nprim;
183 if (role->value != OBJECT_R_VAL)
187 key = kstrdup(OBJECT_R, GFP_KERNEL);
191 rc = hashtab_insert(p->p_roles.table, key, role);
202 static u32 filenametr_hash(struct hashtab *h, const void *k)
204 const struct filename_trans *ft = k;
206 unsigned int byte_num;
209 hash = ft->stype ^ ft->ttype ^ ft->tclass;
212 while ((focus = ft->name[byte_num++]))
213 hash = partial_name_hash(focus, hash);
214 return hash & (h->size - 1);
217 static int filenametr_cmp(struct hashtab *h, const void *k1, const void *k2)
219 const struct filename_trans *ft1 = k1;
220 const struct filename_trans *ft2 = k2;
223 v = ft1->stype - ft2->stype;
227 v = ft1->ttype - ft2->ttype;
231 v = ft1->tclass - ft2->tclass;
235 return strcmp(ft1->name, ft2->name);
239 static u32 rangetr_hash(struct hashtab *h, const void *k)
241 const struct range_trans *key = k;
242 return (key->source_type + (key->target_type << 3) +
243 (key->target_class << 5)) & (h->size - 1);
246 static int rangetr_cmp(struct hashtab *h, const void *k1, const void *k2)
248 const struct range_trans *key1 = k1, *key2 = k2;
251 v = key1->source_type - key2->source_type;
255 v = key1->target_type - key2->target_type;
259 v = key1->target_class - key2->target_class;
265 * Initialize a policy database structure.
267 static int policydb_init(struct policydb *p)
271 memset(p, 0, sizeof(*p));
273 for (i = 0; i < SYM_NUM; i++) {
274 rc = symtab_init(&p->symtab[i], symtab_sizes[i]);
279 rc = avtab_init(&p->te_avtab);
287 rc = cond_policydb_init(p);
291 p->filename_trans = hashtab_create(filenametr_hash, filenametr_cmp, (1 << 10));
292 if (!p->filename_trans) {
297 p->range_tr = hashtab_create(rangetr_hash, rangetr_cmp, 256);
303 ebitmap_init(&p->filename_trans_ttypes);
304 ebitmap_init(&p->policycaps);
305 ebitmap_init(&p->permissive_map);
309 hashtab_destroy(p->filename_trans);
310 hashtab_destroy(p->range_tr);
311 for (i = 0; i < SYM_NUM; i++)
312 hashtab_destroy(p->symtab[i].table);
317 * The following *_index functions are used to
318 * define the val_to_name and val_to_struct arrays
319 * in a policy database structure. The val_to_name
320 * arrays are used when converting security context
321 * structures into string representations. The
322 * val_to_struct arrays are used when the attributes
323 * of a class, role, or user are needed.
326 static int common_index(void *key, void *datum, void *datap)
329 struct common_datum *comdatum;
330 struct flex_array *fa;
334 if (!comdatum->value || comdatum->value > p->p_commons.nprim)
337 fa = p->sym_val_to_name[SYM_COMMONS];
338 if (flex_array_put_ptr(fa, comdatum->value - 1, key,
339 GFP_KERNEL | __GFP_ZERO))
344 static int class_index(void *key, void *datum, void *datap)
347 struct class_datum *cladatum;
348 struct flex_array *fa;
352 if (!cladatum->value || cladatum->value > p->p_classes.nprim)
354 fa = p->sym_val_to_name[SYM_CLASSES];
355 if (flex_array_put_ptr(fa, cladatum->value - 1, key,
356 GFP_KERNEL | __GFP_ZERO))
358 p->class_val_to_struct[cladatum->value - 1] = cladatum;
362 static int role_index(void *key, void *datum, void *datap)
365 struct role_datum *role;
366 struct flex_array *fa;
371 || role->value > p->p_roles.nprim
372 || role->bounds > p->p_roles.nprim)
375 fa = p->sym_val_to_name[SYM_ROLES];
376 if (flex_array_put_ptr(fa, role->value - 1, key,
377 GFP_KERNEL | __GFP_ZERO))
379 p->role_val_to_struct[role->value - 1] = role;
383 static int type_index(void *key, void *datum, void *datap)
386 struct type_datum *typdatum;
387 struct flex_array *fa;
392 if (typdatum->primary) {
394 || typdatum->value > p->p_types.nprim
395 || typdatum->bounds > p->p_types.nprim)
397 fa = p->sym_val_to_name[SYM_TYPES];
398 if (flex_array_put_ptr(fa, typdatum->value - 1, key,
399 GFP_KERNEL | __GFP_ZERO))
402 fa = p->type_val_to_struct_array;
403 if (flex_array_put_ptr(fa, typdatum->value - 1, typdatum,
404 GFP_KERNEL | __GFP_ZERO))
411 static int user_index(void *key, void *datum, void *datap)
414 struct user_datum *usrdatum;
415 struct flex_array *fa;
420 || usrdatum->value > p->p_users.nprim
421 || usrdatum->bounds > p->p_users.nprim)
424 fa = p->sym_val_to_name[SYM_USERS];
425 if (flex_array_put_ptr(fa, usrdatum->value - 1, key,
426 GFP_KERNEL | __GFP_ZERO))
428 p->user_val_to_struct[usrdatum->value - 1] = usrdatum;
432 static int sens_index(void *key, void *datum, void *datap)
435 struct level_datum *levdatum;
436 struct flex_array *fa;
441 if (!levdatum->isalias) {
442 if (!levdatum->level->sens ||
443 levdatum->level->sens > p->p_levels.nprim)
445 fa = p->sym_val_to_name[SYM_LEVELS];
446 if (flex_array_put_ptr(fa, levdatum->level->sens - 1, key,
447 GFP_KERNEL | __GFP_ZERO))
454 static int cat_index(void *key, void *datum, void *datap)
457 struct cat_datum *catdatum;
458 struct flex_array *fa;
463 if (!catdatum->isalias) {
464 if (!catdatum->value || catdatum->value > p->p_cats.nprim)
466 fa = p->sym_val_to_name[SYM_CATS];
467 if (flex_array_put_ptr(fa, catdatum->value - 1, key,
468 GFP_KERNEL | __GFP_ZERO))
475 static int (*index_f[SYM_NUM]) (void *key, void *datum, void *datap) =
488 static void hash_eval(struct hashtab *h, const char *hash_name)
490 struct hashtab_info info;
492 hashtab_stat(h, &info);
493 printk(KERN_DEBUG "SELinux: %s: %d entries and %d/%d buckets used, "
494 "longest chain length %d\n", hash_name, h->nel,
495 info.slots_used, h->size, info.max_chain_len);
498 static void symtab_hash_eval(struct symtab *s)
502 for (i = 0; i < SYM_NUM; i++)
503 hash_eval(s[i].table, symtab_name[i]);
507 static inline void hash_eval(struct hashtab *h, char *hash_name)
513 * Define the other val_to_name and val_to_struct arrays
514 * in a policy database structure.
516 * Caller must clean up on failure.
518 static int policydb_index(struct policydb *p)
522 printk(KERN_DEBUG "SELinux: %d users, %d roles, %d types, %d bools",
523 p->p_users.nprim, p->p_roles.nprim, p->p_types.nprim, p->p_bools.nprim);
525 printk(", %d sens, %d cats", p->p_levels.nprim,
529 printk(KERN_DEBUG "SELinux: %d classes, %d rules\n",
530 p->p_classes.nprim, p->te_avtab.nel);
533 avtab_hash_eval(&p->te_avtab, "rules");
534 symtab_hash_eval(p->symtab);
538 p->class_val_to_struct =
539 kmalloc(p->p_classes.nprim * sizeof(*(p->class_val_to_struct)),
541 if (!p->class_val_to_struct)
545 p->role_val_to_struct =
546 kmalloc(p->p_roles.nprim * sizeof(*(p->role_val_to_struct)),
548 if (!p->role_val_to_struct)
552 p->user_val_to_struct =
553 kmalloc(p->p_users.nprim * sizeof(*(p->user_val_to_struct)),
555 if (!p->user_val_to_struct)
558 /* Yes, I want the sizeof the pointer, not the structure */
560 p->type_val_to_struct_array = flex_array_alloc(sizeof(struct type_datum *),
562 GFP_KERNEL | __GFP_ZERO);
563 if (!p->type_val_to_struct_array)
566 rc = flex_array_prealloc(p->type_val_to_struct_array, 0,
567 p->p_types.nprim, GFP_KERNEL | __GFP_ZERO);
571 rc = cond_init_bool_indexes(p);
575 for (i = 0; i < SYM_NUM; i++) {
577 p->sym_val_to_name[i] = flex_array_alloc(sizeof(char *),
579 GFP_KERNEL | __GFP_ZERO);
580 if (!p->sym_val_to_name[i])
583 rc = flex_array_prealloc(p->sym_val_to_name[i],
584 0, p->symtab[i].nprim,
585 GFP_KERNEL | __GFP_ZERO);
589 rc = hashtab_map(p->symtab[i].table, index_f[i], p);
599 * The following *_destroy functions are used to
600 * free any memory allocated for each kind of
601 * symbol data in the policy database.
604 static int perm_destroy(void *key, void *datum, void *p)
611 static int common_destroy(void *key, void *datum, void *p)
613 struct common_datum *comdatum;
618 hashtab_map(comdatum->permissions.table, perm_destroy, NULL);
619 hashtab_destroy(comdatum->permissions.table);
625 static void constraint_expr_destroy(struct constraint_expr *expr)
628 ebitmap_destroy(&expr->names);
629 if (expr->type_names) {
630 ebitmap_destroy(&expr->type_names->types);
631 ebitmap_destroy(&expr->type_names->negset);
632 kfree(expr->type_names);
638 static int cls_destroy(void *key, void *datum, void *p)
640 struct class_datum *cladatum;
641 struct constraint_node *constraint, *ctemp;
642 struct constraint_expr *e, *etmp;
647 hashtab_map(cladatum->permissions.table, perm_destroy, NULL);
648 hashtab_destroy(cladatum->permissions.table);
649 constraint = cladatum->constraints;
651 e = constraint->expr;
655 constraint_expr_destroy(etmp);
658 constraint = constraint->next;
662 constraint = cladatum->validatetrans;
664 e = constraint->expr;
668 constraint_expr_destroy(etmp);
671 constraint = constraint->next;
674 kfree(cladatum->comkey);
680 static int role_destroy(void *key, void *datum, void *p)
682 struct role_datum *role;
687 ebitmap_destroy(&role->dominates);
688 ebitmap_destroy(&role->types);
694 static int type_destroy(void *key, void *datum, void *p)
701 static int user_destroy(void *key, void *datum, void *p)
703 struct user_datum *usrdatum;
708 ebitmap_destroy(&usrdatum->roles);
709 ebitmap_destroy(&usrdatum->range.level[0].cat);
710 ebitmap_destroy(&usrdatum->range.level[1].cat);
711 ebitmap_destroy(&usrdatum->dfltlevel.cat);
717 static int sens_destroy(void *key, void *datum, void *p)
719 struct level_datum *levdatum;
724 ebitmap_destroy(&levdatum->level->cat);
725 kfree(levdatum->level);
731 static int cat_destroy(void *key, void *datum, void *p)
738 static int (*destroy_f[SYM_NUM]) (void *key, void *datum, void *datap) =
750 static int filenametr_destroy(void *key, void *datum, void *p)
752 struct filename_trans *ft = key;
760 static int range_tr_destroy(void *key, void *datum, void *p)
762 struct mls_range *rt = datum;
764 ebitmap_destroy(&rt->level[0].cat);
765 ebitmap_destroy(&rt->level[1].cat);
771 static void ocontext_destroy(struct ocontext *c, int i)
776 context_destroy(&c->context[0]);
777 context_destroy(&c->context[1]);
778 if (i == OCON_ISID || i == OCON_FS ||
779 i == OCON_NETIF || i == OCON_FSUSE)
785 * Free any memory allocated by a policy database structure.
787 void policydb_destroy(struct policydb *p)
789 struct ocontext *c, *ctmp;
790 struct genfs *g, *gtmp;
792 struct role_allow *ra, *lra = NULL;
793 struct role_trans *tr, *ltr = NULL;
795 for (i = 0; i < SYM_NUM; i++) {
797 hashtab_map(p->symtab[i].table, destroy_f[i], NULL);
798 hashtab_destroy(p->symtab[i].table);
801 for (i = 0; i < SYM_NUM; i++) {
802 if (p->sym_val_to_name[i])
803 flex_array_free(p->sym_val_to_name[i]);
806 kfree(p->class_val_to_struct);
807 kfree(p->role_val_to_struct);
808 kfree(p->user_val_to_struct);
809 if (p->type_val_to_struct_array)
810 flex_array_free(p->type_val_to_struct_array);
812 avtab_destroy(&p->te_avtab);
814 for (i = 0; i < OCON_NUM; i++) {
820 ocontext_destroy(ctmp, i);
822 p->ocontexts[i] = NULL;
833 ocontext_destroy(ctmp, OCON_FSUSE);
841 cond_policydb_destroy(p);
843 for (tr = p->role_tr; tr; tr = tr->next) {
850 for (ra = p->role_allow; ra; ra = ra->next) {
857 hashtab_map(p->filename_trans, filenametr_destroy, NULL);
858 hashtab_destroy(p->filename_trans);
860 hashtab_map(p->range_tr, range_tr_destroy, NULL);
861 hashtab_destroy(p->range_tr);
863 if (p->type_attr_map_array) {
864 for (i = 0; i < p->p_types.nprim; i++) {
867 e = flex_array_get(p->type_attr_map_array, i);
872 flex_array_free(p->type_attr_map_array);
875 ebitmap_destroy(&p->filename_trans_ttypes);
876 ebitmap_destroy(&p->policycaps);
877 ebitmap_destroy(&p->permissive_map);
883 * Load the initial SIDs specified in a policy database
884 * structure into a SID table.
886 int policydb_load_isids(struct policydb *p, struct sidtab *s)
888 struct ocontext *head, *c;
893 printk(KERN_ERR "SELinux: out of memory on SID table init\n");
897 head = p->ocontexts[OCON_ISID];
898 for (c = head; c; c = c->next) {
900 if (!c->context[0].user) {
901 printk(KERN_ERR "SELinux: SID %s was never defined.\n",
906 rc = sidtab_insert(s, c->sid[0], &c->context[0]);
908 printk(KERN_ERR "SELinux: unable to load initial SID %s.\n",
918 int policydb_class_isvalid(struct policydb *p, unsigned int class)
920 if (!class || class > p->p_classes.nprim)
925 int policydb_role_isvalid(struct policydb *p, unsigned int role)
927 if (!role || role > p->p_roles.nprim)
932 int policydb_type_isvalid(struct policydb *p, unsigned int type)
934 if (!type || type > p->p_types.nprim)
940 * Return 1 if the fields in the security context
941 * structure `c' are valid. Return 0 otherwise.
943 int policydb_context_isvalid(struct policydb *p, struct context *c)
945 struct role_datum *role;
946 struct user_datum *usrdatum;
948 if (!c->role || c->role > p->p_roles.nprim)
951 if (!c->user || c->user > p->p_users.nprim)
954 if (!c->type || c->type > p->p_types.nprim)
957 if (c->role != OBJECT_R_VAL) {
959 * Role must be authorized for the type.
961 role = p->role_val_to_struct[c->role - 1];
962 if (!ebitmap_get_bit(&role->types, c->type - 1))
963 /* role may not be associated with type */
967 * User must be authorized for the role.
969 usrdatum = p->user_val_to_struct[c->user - 1];
973 if (!ebitmap_get_bit(&usrdatum->roles, c->role - 1))
974 /* user may not be associated with role */
978 if (!mls_context_isvalid(p, c))
985 * Read a MLS range structure from a policydb binary
986 * representation file.
988 static int mls_read_range_helper(struct mls_range *r, void *fp)
994 rc = next_entry(buf, fp, sizeof(u32));
999 items = le32_to_cpu(buf[0]);
1000 if (items > ARRAY_SIZE(buf)) {
1001 printk(KERN_ERR "SELinux: mls: range overflow\n");
1005 rc = next_entry(buf, fp, sizeof(u32) * items);
1007 printk(KERN_ERR "SELinux: mls: truncated range\n");
1011 r->level[0].sens = le32_to_cpu(buf[0]);
1013 r->level[1].sens = le32_to_cpu(buf[1]);
1015 r->level[1].sens = r->level[0].sens;
1017 rc = ebitmap_read(&r->level[0].cat, fp);
1019 printk(KERN_ERR "SELinux: mls: error reading low categories\n");
1023 rc = ebitmap_read(&r->level[1].cat, fp);
1025 printk(KERN_ERR "SELinux: mls: error reading high categories\n");
1029 rc = ebitmap_cpy(&r->level[1].cat, &r->level[0].cat);
1031 printk(KERN_ERR "SELinux: mls: out of memory\n");
1038 ebitmap_destroy(&r->level[0].cat);
1044 * Read and validate a security context structure
1045 * from a policydb binary representation file.
1047 static int context_read_and_validate(struct context *c,
1054 rc = next_entry(buf, fp, sizeof buf);
1056 printk(KERN_ERR "SELinux: context truncated\n");
1059 c->user = le32_to_cpu(buf[0]);
1060 c->role = le32_to_cpu(buf[1]);
1061 c->type = le32_to_cpu(buf[2]);
1062 if (p->policyvers >= POLICYDB_VERSION_MLS) {
1063 rc = mls_read_range_helper(&c->range, fp);
1065 printk(KERN_ERR "SELinux: error reading MLS range of context\n");
1071 if (!policydb_context_isvalid(p, c)) {
1072 printk(KERN_ERR "SELinux: invalid security context\n");
1082 * The following *_read functions are used to
1083 * read the symbol data from a policy database
1084 * binary representation file.
1087 static int str_read(char **strp, gfp_t flags, void *fp, u32 len)
1092 str = kmalloc(len + 1, flags);
1096 /* it's expected the caller should free the str */
1099 rc = next_entry(str, fp, len);
1107 static int perm_read(struct policydb *p, struct hashtab *h, void *fp)
1110 struct perm_datum *perdatum;
1116 perdatum = kzalloc(sizeof(*perdatum), GFP_KERNEL);
1120 rc = next_entry(buf, fp, sizeof buf);
1124 len = le32_to_cpu(buf[0]);
1125 perdatum->value = le32_to_cpu(buf[1]);
1127 rc = str_read(&key, GFP_KERNEL, fp, len);
1131 rc = hashtab_insert(h, key, perdatum);
1137 perm_destroy(key, perdatum, NULL);
1141 static int common_read(struct policydb *p, struct hashtab *h, void *fp)
1144 struct common_datum *comdatum;
1150 comdatum = kzalloc(sizeof(*comdatum), GFP_KERNEL);
1154 rc = next_entry(buf, fp, sizeof buf);
1158 len = le32_to_cpu(buf[0]);
1159 comdatum->value = le32_to_cpu(buf[1]);
1161 rc = symtab_init(&comdatum->permissions, PERM_SYMTAB_SIZE);
1164 comdatum->permissions.nprim = le32_to_cpu(buf[2]);
1165 nel = le32_to_cpu(buf[3]);
1167 rc = str_read(&key, GFP_KERNEL, fp, len);
1171 for (i = 0; i < nel; i++) {
1172 rc = perm_read(p, comdatum->permissions.table, fp);
1177 rc = hashtab_insert(h, key, comdatum);
1182 common_destroy(key, comdatum, NULL);
1186 static void type_set_init(struct type_set *t)
1188 ebitmap_init(&t->types);
1189 ebitmap_init(&t->negset);
1192 static int type_set_read(struct type_set *t, void *fp)
1197 if (ebitmap_read(&t->types, fp))
1199 if (ebitmap_read(&t->negset, fp))
1202 rc = next_entry(buf, fp, sizeof(u32));
1205 t->flags = le32_to_cpu(buf[0]);
1211 static int read_cons_helper(struct policydb *p,
1212 struct constraint_node **nodep,
1213 int ncons, int allowxtarget, void *fp)
1215 struct constraint_node *c, *lc;
1216 struct constraint_expr *e, *le;
1219 int rc, i, j, depth;
1222 for (i = 0; i < ncons; i++) {
1223 c = kzalloc(sizeof(*c), GFP_KERNEL);
1232 rc = next_entry(buf, fp, (sizeof(u32) * 2));
1235 c->permissions = le32_to_cpu(buf[0]);
1236 nexpr = le32_to_cpu(buf[1]);
1239 for (j = 0; j < nexpr; j++) {
1240 e = kzalloc(sizeof(*e), GFP_KERNEL);
1249 rc = next_entry(buf, fp, (sizeof(u32) * 3));
1252 e->expr_type = le32_to_cpu(buf[0]);
1253 e->attr = le32_to_cpu(buf[1]);
1254 e->op = le32_to_cpu(buf[2]);
1256 switch (e->expr_type) {
1268 if (depth == (CEXPR_MAXDEPTH - 1))
1273 if (!allowxtarget && (e->attr & CEXPR_XTARGET))
1275 if (depth == (CEXPR_MAXDEPTH - 1))
1278 rc = ebitmap_read(&e->names, fp);
1281 if (p->policyvers >=
1282 POLICYDB_VERSION_CONSTRAINT_NAMES) {
1283 e->type_names = kzalloc(sizeof
1288 type_set_init(e->type_names);
1289 rc = type_set_read(e->type_names, fp);
1307 static int class_read(struct policydb *p, struct hashtab *h, void *fp)
1310 struct class_datum *cladatum;
1312 u32 len, len2, ncons, nel;
1316 cladatum = kzalloc(sizeof(*cladatum), GFP_KERNEL);
1320 rc = next_entry(buf, fp, sizeof(u32)*6);
1324 len = le32_to_cpu(buf[0]);
1325 len2 = le32_to_cpu(buf[1]);
1326 cladatum->value = le32_to_cpu(buf[2]);
1328 rc = symtab_init(&cladatum->permissions, PERM_SYMTAB_SIZE);
1331 cladatum->permissions.nprim = le32_to_cpu(buf[3]);
1332 nel = le32_to_cpu(buf[4]);
1334 ncons = le32_to_cpu(buf[5]);
1336 rc = str_read(&key, GFP_KERNEL, fp, len);
1341 rc = str_read(&cladatum->comkey, GFP_KERNEL, fp, len2);
1346 cladatum->comdatum = hashtab_search(p->p_commons.table, cladatum->comkey);
1347 if (!cladatum->comdatum) {
1348 printk(KERN_ERR "SELinux: unknown common %s\n", cladatum->comkey);
1352 for (i = 0; i < nel; i++) {
1353 rc = perm_read(p, cladatum->permissions.table, fp);
1358 rc = read_cons_helper(p, &cladatum->constraints, ncons, 0, fp);
1362 if (p->policyvers >= POLICYDB_VERSION_VALIDATETRANS) {
1363 /* grab the validatetrans rules */
1364 rc = next_entry(buf, fp, sizeof(u32));
1367 ncons = le32_to_cpu(buf[0]);
1368 rc = read_cons_helper(p, &cladatum->validatetrans,
1374 if (p->policyvers >= POLICYDB_VERSION_NEW_OBJECT_DEFAULTS) {
1375 rc = next_entry(buf, fp, sizeof(u32) * 3);
1379 cladatum->default_user = le32_to_cpu(buf[0]);
1380 cladatum->default_role = le32_to_cpu(buf[1]);
1381 cladatum->default_range = le32_to_cpu(buf[2]);
1384 if (p->policyvers >= POLICYDB_VERSION_DEFAULT_TYPE) {
1385 rc = next_entry(buf, fp, sizeof(u32) * 1);
1388 cladatum->default_type = le32_to_cpu(buf[0]);
1391 rc = hashtab_insert(h, key, cladatum);
1397 cls_destroy(key, cladatum, NULL);
1401 static int role_read(struct policydb *p, struct hashtab *h, void *fp)
1404 struct role_datum *role;
1405 int rc, to_read = 2;
1410 role = kzalloc(sizeof(*role), GFP_KERNEL);
1414 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1417 rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1421 len = le32_to_cpu(buf[0]);
1422 role->value = le32_to_cpu(buf[1]);
1423 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1424 role->bounds = le32_to_cpu(buf[2]);
1426 rc = str_read(&key, GFP_KERNEL, fp, len);
1430 rc = ebitmap_read(&role->dominates, fp);
1434 rc = ebitmap_read(&role->types, fp);
1438 if (strcmp(key, OBJECT_R) == 0) {
1440 if (role->value != OBJECT_R_VAL) {
1441 printk(KERN_ERR "SELinux: Role %s has wrong value %d\n",
1442 OBJECT_R, role->value);
1449 rc = hashtab_insert(h, key, role);
1454 role_destroy(key, role, NULL);
1458 static int type_read(struct policydb *p, struct hashtab *h, void *fp)
1461 struct type_datum *typdatum;
1462 int rc, to_read = 3;
1467 typdatum = kzalloc(sizeof(*typdatum), GFP_KERNEL);
1471 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1474 rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1478 len = le32_to_cpu(buf[0]);
1479 typdatum->value = le32_to_cpu(buf[1]);
1480 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) {
1481 u32 prop = le32_to_cpu(buf[2]);
1483 if (prop & TYPEDATUM_PROPERTY_PRIMARY)
1484 typdatum->primary = 1;
1485 if (prop & TYPEDATUM_PROPERTY_ATTRIBUTE)
1486 typdatum->attribute = 1;
1488 typdatum->bounds = le32_to_cpu(buf[3]);
1490 typdatum->primary = le32_to_cpu(buf[2]);
1493 rc = str_read(&key, GFP_KERNEL, fp, len);
1497 rc = hashtab_insert(h, key, typdatum);
1502 type_destroy(key, typdatum, NULL);
1508 * Read a MLS level structure from a policydb binary
1509 * representation file.
1511 static int mls_read_level(struct mls_level *lp, void *fp)
1516 memset(lp, 0, sizeof(*lp));
1518 rc = next_entry(buf, fp, sizeof buf);
1520 printk(KERN_ERR "SELinux: mls: truncated level\n");
1523 lp->sens = le32_to_cpu(buf[0]);
1525 rc = ebitmap_read(&lp->cat, fp);
1527 printk(KERN_ERR "SELinux: mls: error reading level categories\n");
1533 static int user_read(struct policydb *p, struct hashtab *h, void *fp)
1536 struct user_datum *usrdatum;
1537 int rc, to_read = 2;
1542 usrdatum = kzalloc(sizeof(*usrdatum), GFP_KERNEL);
1546 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1549 rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1553 len = le32_to_cpu(buf[0]);
1554 usrdatum->value = le32_to_cpu(buf[1]);
1555 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1556 usrdatum->bounds = le32_to_cpu(buf[2]);
1558 rc = str_read(&key, GFP_KERNEL, fp, len);
1562 rc = ebitmap_read(&usrdatum->roles, fp);
1566 if (p->policyvers >= POLICYDB_VERSION_MLS) {
1567 rc = mls_read_range_helper(&usrdatum->range, fp);
1570 rc = mls_read_level(&usrdatum->dfltlevel, fp);
1575 rc = hashtab_insert(h, key, usrdatum);
1580 user_destroy(key, usrdatum, NULL);
1584 static int sens_read(struct policydb *p, struct hashtab *h, void *fp)
1587 struct level_datum *levdatum;
1593 levdatum = kzalloc(sizeof(*levdatum), GFP_ATOMIC);
1597 rc = next_entry(buf, fp, sizeof buf);
1601 len = le32_to_cpu(buf[0]);
1602 levdatum->isalias = le32_to_cpu(buf[1]);
1604 rc = str_read(&key, GFP_ATOMIC, fp, len);
1609 levdatum->level = kmalloc(sizeof(struct mls_level), GFP_ATOMIC);
1610 if (!levdatum->level)
1613 rc = mls_read_level(levdatum->level, fp);
1617 rc = hashtab_insert(h, key, levdatum);
1622 sens_destroy(key, levdatum, NULL);
1626 static int cat_read(struct policydb *p, struct hashtab *h, void *fp)
1629 struct cat_datum *catdatum;
1635 catdatum = kzalloc(sizeof(*catdatum), GFP_ATOMIC);
1639 rc = next_entry(buf, fp, sizeof buf);
1643 len = le32_to_cpu(buf[0]);
1644 catdatum->value = le32_to_cpu(buf[1]);
1645 catdatum->isalias = le32_to_cpu(buf[2]);
1647 rc = str_read(&key, GFP_ATOMIC, fp, len);
1651 rc = hashtab_insert(h, key, catdatum);
1656 cat_destroy(key, catdatum, NULL);
1660 static int (*read_f[SYM_NUM]) (struct policydb *p, struct hashtab *h, void *fp) =
1672 static int user_bounds_sanity_check(void *key, void *datum, void *datap)
1674 struct user_datum *upper, *user;
1675 struct policydb *p = datap;
1678 upper = user = datum;
1679 while (upper->bounds) {
1680 struct ebitmap_node *node;
1683 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1684 printk(KERN_ERR "SELinux: user %s: "
1685 "too deep or looped boundary",
1690 upper = p->user_val_to_struct[upper->bounds - 1];
1691 ebitmap_for_each_positive_bit(&user->roles, node, bit) {
1692 if (ebitmap_get_bit(&upper->roles, bit))
1696 "SELinux: boundary violated policy: "
1697 "user=%s role=%s bounds=%s\n",
1698 sym_name(p, SYM_USERS, user->value - 1),
1699 sym_name(p, SYM_ROLES, bit),
1700 sym_name(p, SYM_USERS, upper->value - 1));
1709 static int role_bounds_sanity_check(void *key, void *datum, void *datap)
1711 struct role_datum *upper, *role;
1712 struct policydb *p = datap;
1715 upper = role = datum;
1716 while (upper->bounds) {
1717 struct ebitmap_node *node;
1720 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1721 printk(KERN_ERR "SELinux: role %s: "
1722 "too deep or looped bounds\n",
1727 upper = p->role_val_to_struct[upper->bounds - 1];
1728 ebitmap_for_each_positive_bit(&role->types, node, bit) {
1729 if (ebitmap_get_bit(&upper->types, bit))
1733 "SELinux: boundary violated policy: "
1734 "role=%s type=%s bounds=%s\n",
1735 sym_name(p, SYM_ROLES, role->value - 1),
1736 sym_name(p, SYM_TYPES, bit),
1737 sym_name(p, SYM_ROLES, upper->value - 1));
1746 static int type_bounds_sanity_check(void *key, void *datum, void *datap)
1748 struct type_datum *upper;
1749 struct policydb *p = datap;
1753 while (upper->bounds) {
1754 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1755 printk(KERN_ERR "SELinux: type %s: "
1756 "too deep or looped boundary\n",
1761 upper = flex_array_get_ptr(p->type_val_to_struct_array,
1765 if (upper->attribute) {
1766 printk(KERN_ERR "SELinux: type %s: "
1767 "bounded by attribute %s",
1769 sym_name(p, SYM_TYPES, upper->value - 1));
1777 static int policydb_bounds_sanity_check(struct policydb *p)
1781 if (p->policyvers < POLICYDB_VERSION_BOUNDARY)
1784 rc = hashtab_map(p->p_users.table,
1785 user_bounds_sanity_check, p);
1789 rc = hashtab_map(p->p_roles.table,
1790 role_bounds_sanity_check, p);
1794 rc = hashtab_map(p->p_types.table,
1795 type_bounds_sanity_check, p);
1802 u16 string_to_security_class(struct policydb *p, const char *name)
1804 struct class_datum *cladatum;
1806 cladatum = hashtab_search(p->p_classes.table, name);
1810 return cladatum->value;
1813 u32 string_to_av_perm(struct policydb *p, u16 tclass, const char *name)
1815 struct class_datum *cladatum;
1816 struct perm_datum *perdatum = NULL;
1817 struct common_datum *comdatum;
1819 if (!tclass || tclass > p->p_classes.nprim)
1822 cladatum = p->class_val_to_struct[tclass-1];
1823 comdatum = cladatum->comdatum;
1825 perdatum = hashtab_search(comdatum->permissions.table,
1828 perdatum = hashtab_search(cladatum->permissions.table,
1833 return 1U << (perdatum->value-1);
1836 static int range_read(struct policydb *p, void *fp)
1838 struct range_trans *rt = NULL;
1839 struct mls_range *r = NULL;
1844 if (p->policyvers < POLICYDB_VERSION_MLS)
1847 rc = next_entry(buf, fp, sizeof(u32));
1851 nel = le32_to_cpu(buf[0]);
1852 for (i = 0; i < nel; i++) {
1854 rt = kzalloc(sizeof(*rt), GFP_KERNEL);
1858 rc = next_entry(buf, fp, (sizeof(u32) * 2));
1862 rt->source_type = le32_to_cpu(buf[0]);
1863 rt->target_type = le32_to_cpu(buf[1]);
1864 if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) {
1865 rc = next_entry(buf, fp, sizeof(u32));
1868 rt->target_class = le32_to_cpu(buf[0]);
1870 rt->target_class = p->process_class;
1873 if (!policydb_type_isvalid(p, rt->source_type) ||
1874 !policydb_type_isvalid(p, rt->target_type) ||
1875 !policydb_class_isvalid(p, rt->target_class))
1879 r = kzalloc(sizeof(*r), GFP_KERNEL);
1883 rc = mls_read_range_helper(r, fp);
1888 if (!mls_range_isvalid(p, r)) {
1889 printk(KERN_WARNING "SELinux: rangetrans: invalid range\n");
1893 rc = hashtab_insert(p->range_tr, rt, r);
1900 hash_eval(p->range_tr, "rangetr");
1908 static int filename_trans_read(struct policydb *p, void *fp)
1910 struct filename_trans *ft;
1911 struct filename_trans_datum *otype;
1917 if (p->policyvers < POLICYDB_VERSION_FILENAME_TRANS)
1920 rc = next_entry(buf, fp, sizeof(u32));
1923 nel = le32_to_cpu(buf[0]);
1925 for (i = 0; i < nel; i++) {
1931 ft = kzalloc(sizeof(*ft), GFP_KERNEL);
1936 otype = kmalloc(sizeof(*otype), GFP_KERNEL);
1940 /* length of the path component string */
1941 rc = next_entry(buf, fp, sizeof(u32));
1944 len = le32_to_cpu(buf[0]);
1946 /* path component string */
1947 rc = str_read(&name, GFP_KERNEL, fp, len);
1953 rc = next_entry(buf, fp, sizeof(u32) * 4);
1957 ft->stype = le32_to_cpu(buf[0]);
1958 ft->ttype = le32_to_cpu(buf[1]);
1959 ft->tclass = le32_to_cpu(buf[2]);
1961 otype->otype = le32_to_cpu(buf[3]);
1963 rc = ebitmap_set_bit(&p->filename_trans_ttypes, ft->ttype, 1);
1967 rc = hashtab_insert(p->filename_trans, ft, otype);
1970 * Do not return -EEXIST to the caller, or the system
1975 /* But free memory to avoid memory leak. */
1981 hash_eval(p->filename_trans, "filenametr");
1991 static int genfs_read(struct policydb *p, void *fp)
1994 u32 nel, nel2, len, len2;
1996 struct ocontext *l, *c;
1997 struct ocontext *newc = NULL;
1998 struct genfs *genfs_p, *genfs;
1999 struct genfs *newgenfs = NULL;
2001 rc = next_entry(buf, fp, sizeof(u32));
2004 nel = le32_to_cpu(buf[0]);
2006 for (i = 0; i < nel; i++) {
2007 rc = next_entry(buf, fp, sizeof(u32));
2010 len = le32_to_cpu(buf[0]);
2013 newgenfs = kzalloc(sizeof(*newgenfs), GFP_KERNEL);
2017 rc = str_read(&newgenfs->fstype, GFP_KERNEL, fp, len);
2021 for (genfs_p = NULL, genfs = p->genfs; genfs;
2022 genfs_p = genfs, genfs = genfs->next) {
2024 if (strcmp(newgenfs->fstype, genfs->fstype) == 0) {
2025 printk(KERN_ERR "SELinux: dup genfs fstype %s\n",
2029 if (strcmp(newgenfs->fstype, genfs->fstype) < 0)
2032 newgenfs->next = genfs;
2034 genfs_p->next = newgenfs;
2036 p->genfs = newgenfs;
2040 rc = next_entry(buf, fp, sizeof(u32));
2044 nel2 = le32_to_cpu(buf[0]);
2045 for (j = 0; j < nel2; j++) {
2046 rc = next_entry(buf, fp, sizeof(u32));
2049 len = le32_to_cpu(buf[0]);
2052 newc = kzalloc(sizeof(*newc), GFP_KERNEL);
2056 rc = str_read(&newc->u.name, GFP_KERNEL, fp, len);
2060 rc = next_entry(buf, fp, sizeof(u32));
2064 newc->v.sclass = le32_to_cpu(buf[0]);
2065 rc = context_read_and_validate(&newc->context[0], p, fp);
2069 for (l = NULL, c = genfs->head; c;
2070 l = c, c = c->next) {
2072 if (!strcmp(newc->u.name, c->u.name) &&
2073 (!c->v.sclass || !newc->v.sclass ||
2074 newc->v.sclass == c->v.sclass)) {
2075 printk(KERN_ERR "SELinux: dup genfs entry (%s,%s)\n",
2076 genfs->fstype, c->u.name);
2079 len = strlen(newc->u.name);
2080 len2 = strlen(c->u.name);
2096 kfree(newgenfs->fstype);
2098 ocontext_destroy(newc, OCON_FSUSE);
2103 static int ocontext_read(struct policydb *p, struct policydb_compat_info *info,
2109 struct ocontext *l, *c;
2112 for (i = 0; i < info->ocon_num; i++) {
2113 rc = next_entry(buf, fp, sizeof(u32));
2116 nel = le32_to_cpu(buf[0]);
2119 for (j = 0; j < nel; j++) {
2121 c = kzalloc(sizeof(*c), GFP_KERNEL);
2127 p->ocontexts[i] = c;
2132 rc = next_entry(buf, fp, sizeof(u32));
2136 c->sid[0] = le32_to_cpu(buf[0]);
2137 rc = context_read_and_validate(&c->context[0], p, fp);
2143 rc = next_entry(buf, fp, sizeof(u32));
2146 len = le32_to_cpu(buf[0]);
2148 rc = str_read(&c->u.name, GFP_KERNEL, fp, len);
2152 rc = context_read_and_validate(&c->context[0], p, fp);
2155 rc = context_read_and_validate(&c->context[1], p, fp);
2160 rc = next_entry(buf, fp, sizeof(u32)*3);
2163 c->u.port.protocol = le32_to_cpu(buf[0]);
2164 c->u.port.low_port = le32_to_cpu(buf[1]);
2165 c->u.port.high_port = le32_to_cpu(buf[2]);
2166 rc = context_read_and_validate(&c->context[0], p, fp);
2171 rc = next_entry(nodebuf, fp, sizeof(u32) * 2);
2174 c->u.node.addr = nodebuf[0]; /* network order */
2175 c->u.node.mask = nodebuf[1]; /* network order */
2176 rc = context_read_and_validate(&c->context[0], p, fp);
2181 rc = next_entry(buf, fp, sizeof(u32)*2);
2186 c->v.behavior = le32_to_cpu(buf[0]);
2187 /* Determined at runtime, not in policy DB. */
2188 if (c->v.behavior == SECURITY_FS_USE_MNTPOINT)
2190 if (c->v.behavior > SECURITY_FS_USE_MAX)
2193 len = le32_to_cpu(buf[1]);
2194 rc = str_read(&c->u.name, GFP_KERNEL, fp, len);
2198 rc = context_read_and_validate(&c->context[0], p, fp);
2205 rc = next_entry(nodebuf, fp, sizeof(u32) * 8);
2208 for (k = 0; k < 4; k++)
2209 c->u.node6.addr[k] = nodebuf[k];
2210 for (k = 0; k < 4; k++)
2211 c->u.node6.mask[k] = nodebuf[k+4];
2212 rc = context_read_and_validate(&c->context[0], p, fp);
2226 * Read the configuration data from a policy database binary
2227 * representation file into a policy database structure.
2229 int policydb_read(struct policydb *p, void *fp)
2231 struct role_allow *ra, *lra;
2232 struct role_trans *tr, *ltr;
2235 u32 len, nprim, nel;
2238 struct policydb_compat_info *info;
2240 rc = policydb_init(p);
2244 /* Read the magic number and string length. */
2245 rc = next_entry(buf, fp, sizeof(u32) * 2);
2250 if (le32_to_cpu(buf[0]) != POLICYDB_MAGIC) {
2251 printk(KERN_ERR "SELinux: policydb magic number 0x%x does "
2252 "not match expected magic number 0x%x\n",
2253 le32_to_cpu(buf[0]), POLICYDB_MAGIC);
2258 len = le32_to_cpu(buf[1]);
2259 if (len != strlen(POLICYDB_STRING)) {
2260 printk(KERN_ERR "SELinux: policydb string length %d does not "
2261 "match expected length %Zu\n",
2262 len, strlen(POLICYDB_STRING));
2267 policydb_str = kmalloc(len + 1, GFP_KERNEL);
2268 if (!policydb_str) {
2269 printk(KERN_ERR "SELinux: unable to allocate memory for policydb "
2270 "string of length %d\n", len);
2274 rc = next_entry(policydb_str, fp, len);
2276 printk(KERN_ERR "SELinux: truncated policydb string identifier\n");
2277 kfree(policydb_str);
2282 policydb_str[len] = '\0';
2283 if (strcmp(policydb_str, POLICYDB_STRING)) {
2284 printk(KERN_ERR "SELinux: policydb string %s does not match "
2285 "my string %s\n", policydb_str, POLICYDB_STRING);
2286 kfree(policydb_str);
2289 /* Done with policydb_str. */
2290 kfree(policydb_str);
2291 policydb_str = NULL;
2293 /* Read the version and table sizes. */
2294 rc = next_entry(buf, fp, sizeof(u32)*4);
2299 p->policyvers = le32_to_cpu(buf[0]);
2300 if (p->policyvers < POLICYDB_VERSION_MIN ||
2301 p->policyvers > POLICYDB_VERSION_MAX) {
2302 printk(KERN_ERR "SELinux: policydb version %d does not match "
2303 "my version range %d-%d\n",
2304 le32_to_cpu(buf[0]), POLICYDB_VERSION_MIN, POLICYDB_VERSION_MAX);
2308 if ((le32_to_cpu(buf[1]) & POLICYDB_CONFIG_MLS)) {
2312 if (p->policyvers < POLICYDB_VERSION_MLS) {
2313 printk(KERN_ERR "SELinux: security policydb version %d "
2314 "(MLS) not backwards compatible\n",
2319 p->reject_unknown = !!(le32_to_cpu(buf[1]) & REJECT_UNKNOWN);
2320 p->allow_unknown = !!(le32_to_cpu(buf[1]) & ALLOW_UNKNOWN);
2322 if (p->policyvers >= POLICYDB_VERSION_POLCAP) {
2323 rc = ebitmap_read(&p->policycaps, fp);
2328 if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE) {
2329 rc = ebitmap_read(&p->permissive_map, fp);
2335 info = policydb_lookup_compat(p->policyvers);
2337 printk(KERN_ERR "SELinux: unable to find policy compat info "
2338 "for version %d\n", p->policyvers);
2343 if (le32_to_cpu(buf[2]) != info->sym_num ||
2344 le32_to_cpu(buf[3]) != info->ocon_num) {
2345 printk(KERN_ERR "SELinux: policydb table sizes (%d,%d) do "
2346 "not match mine (%d,%d)\n", le32_to_cpu(buf[2]),
2347 le32_to_cpu(buf[3]),
2348 info->sym_num, info->ocon_num);
2352 for (i = 0; i < info->sym_num; i++) {
2353 rc = next_entry(buf, fp, sizeof(u32)*2);
2356 nprim = le32_to_cpu(buf[0]);
2357 nel = le32_to_cpu(buf[1]);
2358 for (j = 0; j < nel; j++) {
2359 rc = read_f[i](p, p->symtab[i].table, fp);
2364 p->symtab[i].nprim = nprim;
2368 p->process_class = string_to_security_class(p, "process");
2369 if (!p->process_class)
2372 rc = avtab_read(&p->te_avtab, fp, p);
2376 if (p->policyvers >= POLICYDB_VERSION_BOOL) {
2377 rc = cond_read_list(p, fp);
2382 rc = next_entry(buf, fp, sizeof(u32));
2385 nel = le32_to_cpu(buf[0]);
2387 for (i = 0; i < nel; i++) {
2389 tr = kzalloc(sizeof(*tr), GFP_KERNEL);
2396 rc = next_entry(buf, fp, sizeof(u32)*3);
2401 tr->role = le32_to_cpu(buf[0]);
2402 tr->type = le32_to_cpu(buf[1]);
2403 tr->new_role = le32_to_cpu(buf[2]);
2404 if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) {
2405 rc = next_entry(buf, fp, sizeof(u32));
2408 tr->tclass = le32_to_cpu(buf[0]);
2410 tr->tclass = p->process_class;
2412 if (!policydb_role_isvalid(p, tr->role) ||
2413 !policydb_type_isvalid(p, tr->type) ||
2414 !policydb_class_isvalid(p, tr->tclass) ||
2415 !policydb_role_isvalid(p, tr->new_role))
2420 rc = next_entry(buf, fp, sizeof(u32));
2423 nel = le32_to_cpu(buf[0]);
2425 for (i = 0; i < nel; i++) {
2427 ra = kzalloc(sizeof(*ra), GFP_KERNEL);
2434 rc = next_entry(buf, fp, sizeof(u32)*2);
2439 ra->role = le32_to_cpu(buf[0]);
2440 ra->new_role = le32_to_cpu(buf[1]);
2441 if (!policydb_role_isvalid(p, ra->role) ||
2442 !policydb_role_isvalid(p, ra->new_role))
2447 rc = filename_trans_read(p, fp);
2451 rc = policydb_index(p);
2456 p->process_trans_perms = string_to_av_perm(p, p->process_class, "transition");
2457 p->process_trans_perms |= string_to_av_perm(p, p->process_class, "dyntransition");
2458 if (!p->process_trans_perms)
2461 rc = ocontext_read(p, info, fp);
2465 rc = genfs_read(p, fp);
2469 rc = range_read(p, fp);
2474 p->type_attr_map_array = flex_array_alloc(sizeof(struct ebitmap),
2476 GFP_KERNEL | __GFP_ZERO);
2477 if (!p->type_attr_map_array)
2480 /* preallocate so we don't have to worry about the put ever failing */
2481 rc = flex_array_prealloc(p->type_attr_map_array, 0, p->p_types.nprim,
2482 GFP_KERNEL | __GFP_ZERO);
2486 for (i = 0; i < p->p_types.nprim; i++) {
2487 struct ebitmap *e = flex_array_get(p->type_attr_map_array, i);
2491 if (p->policyvers >= POLICYDB_VERSION_AVTAB) {
2492 rc = ebitmap_read(e, fp);
2496 /* add the type itself as the degenerate case */
2497 rc = ebitmap_set_bit(e, i, 1);
2502 rc = policydb_bounds_sanity_check(p);
2510 policydb_destroy(p);
2515 * Write a MLS level structure to a policydb binary
2516 * representation file.
2518 static int mls_write_level(struct mls_level *l, void *fp)
2523 buf[0] = cpu_to_le32(l->sens);
2524 rc = put_entry(buf, sizeof(u32), 1, fp);
2528 rc = ebitmap_write(&l->cat, fp);
2536 * Write a MLS range structure to a policydb binary
2537 * representation file.
2539 static int mls_write_range_helper(struct mls_range *r, void *fp)
2545 eq = mls_level_eq(&r->level[1], &r->level[0]);
2551 buf[0] = cpu_to_le32(items-1);
2552 buf[1] = cpu_to_le32(r->level[0].sens);
2554 buf[2] = cpu_to_le32(r->level[1].sens);
2556 BUG_ON(items > ARRAY_SIZE(buf));
2558 rc = put_entry(buf, sizeof(u32), items, fp);
2562 rc = ebitmap_write(&r->level[0].cat, fp);
2566 rc = ebitmap_write(&r->level[1].cat, fp);
2574 static int sens_write(void *vkey, void *datum, void *ptr)
2577 struct level_datum *levdatum = datum;
2578 struct policy_data *pd = ptr;
2585 buf[0] = cpu_to_le32(len);
2586 buf[1] = cpu_to_le32(levdatum->isalias);
2587 rc = put_entry(buf, sizeof(u32), 2, fp);
2591 rc = put_entry(key, 1, len, fp);
2595 rc = mls_write_level(levdatum->level, fp);
2602 static int cat_write(void *vkey, void *datum, void *ptr)
2605 struct cat_datum *catdatum = datum;
2606 struct policy_data *pd = ptr;
2613 buf[0] = cpu_to_le32(len);
2614 buf[1] = cpu_to_le32(catdatum->value);
2615 buf[2] = cpu_to_le32(catdatum->isalias);
2616 rc = put_entry(buf, sizeof(u32), 3, fp);
2620 rc = put_entry(key, 1, len, fp);
2627 static int role_trans_write(struct policydb *p, void *fp)
2629 struct role_trans *r = p->role_tr;
2630 struct role_trans *tr;
2636 for (tr = r; tr; tr = tr->next)
2638 buf[0] = cpu_to_le32(nel);
2639 rc = put_entry(buf, sizeof(u32), 1, fp);
2642 for (tr = r; tr; tr = tr->next) {
2643 buf[0] = cpu_to_le32(tr->role);
2644 buf[1] = cpu_to_le32(tr->type);
2645 buf[2] = cpu_to_le32(tr->new_role);
2646 rc = put_entry(buf, sizeof(u32), 3, fp);
2649 if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) {
2650 buf[0] = cpu_to_le32(tr->tclass);
2651 rc = put_entry(buf, sizeof(u32), 1, fp);
2660 static int role_allow_write(struct role_allow *r, void *fp)
2662 struct role_allow *ra;
2668 for (ra = r; ra; ra = ra->next)
2670 buf[0] = cpu_to_le32(nel);
2671 rc = put_entry(buf, sizeof(u32), 1, fp);
2674 for (ra = r; ra; ra = ra->next) {
2675 buf[0] = cpu_to_le32(ra->role);
2676 buf[1] = cpu_to_le32(ra->new_role);
2677 rc = put_entry(buf, sizeof(u32), 2, fp);
2685 * Write a security context structure
2686 * to a policydb binary representation file.
2688 static int context_write(struct policydb *p, struct context *c,
2694 buf[0] = cpu_to_le32(c->user);
2695 buf[1] = cpu_to_le32(c->role);
2696 buf[2] = cpu_to_le32(c->type);
2698 rc = put_entry(buf, sizeof(u32), 3, fp);
2702 rc = mls_write_range_helper(&c->range, fp);
2710 * The following *_write functions are used to
2711 * write the symbol data to a policy database
2712 * binary representation file.
2715 static int perm_write(void *vkey, void *datum, void *fp)
2718 struct perm_datum *perdatum = datum;
2724 buf[0] = cpu_to_le32(len);
2725 buf[1] = cpu_to_le32(perdatum->value);
2726 rc = put_entry(buf, sizeof(u32), 2, fp);
2730 rc = put_entry(key, 1, len, fp);
2737 static int common_write(void *vkey, void *datum, void *ptr)
2740 struct common_datum *comdatum = datum;
2741 struct policy_data *pd = ptr;
2748 buf[0] = cpu_to_le32(len);
2749 buf[1] = cpu_to_le32(comdatum->value);
2750 buf[2] = cpu_to_le32(comdatum->permissions.nprim);
2751 buf[3] = cpu_to_le32(comdatum->permissions.table->nel);
2752 rc = put_entry(buf, sizeof(u32), 4, fp);
2756 rc = put_entry(key, 1, len, fp);
2760 rc = hashtab_map(comdatum->permissions.table, perm_write, fp);
2767 static int type_set_write(struct type_set *t, void *fp)
2772 if (ebitmap_write(&t->types, fp))
2774 if (ebitmap_write(&t->negset, fp))
2777 buf[0] = cpu_to_le32(t->flags);
2778 rc = put_entry(buf, sizeof(u32), 1, fp);
2785 static int write_cons_helper(struct policydb *p, struct constraint_node *node,
2788 struct constraint_node *c;
2789 struct constraint_expr *e;
2794 for (c = node; c; c = c->next) {
2796 for (e = c->expr; e; e = e->next)
2798 buf[0] = cpu_to_le32(c->permissions);
2799 buf[1] = cpu_to_le32(nel);
2800 rc = put_entry(buf, sizeof(u32), 2, fp);
2803 for (e = c->expr; e; e = e->next) {
2804 buf[0] = cpu_to_le32(e->expr_type);
2805 buf[1] = cpu_to_le32(e->attr);
2806 buf[2] = cpu_to_le32(e->op);
2807 rc = put_entry(buf, sizeof(u32), 3, fp);
2811 switch (e->expr_type) {
2813 rc = ebitmap_write(&e->names, fp);
2816 if (p->policyvers >=
2817 POLICYDB_VERSION_CONSTRAINT_NAMES) {
2818 rc = type_set_write(e->type_names, fp);
2832 static int class_write(void *vkey, void *datum, void *ptr)
2835 struct class_datum *cladatum = datum;
2836 struct policy_data *pd = ptr;
2838 struct policydb *p = pd->p;
2839 struct constraint_node *c;
2846 if (cladatum->comkey)
2847 len2 = strlen(cladatum->comkey);
2852 for (c = cladatum->constraints; c; c = c->next)
2855 buf[0] = cpu_to_le32(len);
2856 buf[1] = cpu_to_le32(len2);
2857 buf[2] = cpu_to_le32(cladatum->value);
2858 buf[3] = cpu_to_le32(cladatum->permissions.nprim);
2859 if (cladatum->permissions.table)
2860 buf[4] = cpu_to_le32(cladatum->permissions.table->nel);
2863 buf[5] = cpu_to_le32(ncons);
2864 rc = put_entry(buf, sizeof(u32), 6, fp);
2868 rc = put_entry(key, 1, len, fp);
2872 if (cladatum->comkey) {
2873 rc = put_entry(cladatum->comkey, 1, len2, fp);
2878 rc = hashtab_map(cladatum->permissions.table, perm_write, fp);
2882 rc = write_cons_helper(p, cladatum->constraints, fp);
2886 /* write out the validatetrans rule */
2888 for (c = cladatum->validatetrans; c; c = c->next)
2891 buf[0] = cpu_to_le32(ncons);
2892 rc = put_entry(buf, sizeof(u32), 1, fp);
2896 rc = write_cons_helper(p, cladatum->validatetrans, fp);
2900 if (p->policyvers >= POLICYDB_VERSION_NEW_OBJECT_DEFAULTS) {
2901 buf[0] = cpu_to_le32(cladatum->default_user);
2902 buf[1] = cpu_to_le32(cladatum->default_role);
2903 buf[2] = cpu_to_le32(cladatum->default_range);
2905 rc = put_entry(buf, sizeof(uint32_t), 3, fp);
2910 if (p->policyvers >= POLICYDB_VERSION_DEFAULT_TYPE) {
2911 buf[0] = cpu_to_le32(cladatum->default_type);
2912 rc = put_entry(buf, sizeof(uint32_t), 1, fp);
2920 static int role_write(void *vkey, void *datum, void *ptr)
2923 struct role_datum *role = datum;
2924 struct policy_data *pd = ptr;
2926 struct policydb *p = pd->p;
2933 buf[items++] = cpu_to_le32(len);
2934 buf[items++] = cpu_to_le32(role->value);
2935 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
2936 buf[items++] = cpu_to_le32(role->bounds);
2938 BUG_ON(items > ARRAY_SIZE(buf));
2940 rc = put_entry(buf, sizeof(u32), items, fp);
2944 rc = put_entry(key, 1, len, fp);
2948 rc = ebitmap_write(&role->dominates, fp);
2952 rc = ebitmap_write(&role->types, fp);
2959 static int type_write(void *vkey, void *datum, void *ptr)
2962 struct type_datum *typdatum = datum;
2963 struct policy_data *pd = ptr;
2964 struct policydb *p = pd->p;
2972 buf[items++] = cpu_to_le32(len);
2973 buf[items++] = cpu_to_le32(typdatum->value);
2974 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) {
2977 if (typdatum->primary)
2978 properties |= TYPEDATUM_PROPERTY_PRIMARY;
2980 if (typdatum->attribute)
2981 properties |= TYPEDATUM_PROPERTY_ATTRIBUTE;
2983 buf[items++] = cpu_to_le32(properties);
2984 buf[items++] = cpu_to_le32(typdatum->bounds);
2986 buf[items++] = cpu_to_le32(typdatum->primary);
2988 BUG_ON(items > ARRAY_SIZE(buf));
2989 rc = put_entry(buf, sizeof(u32), items, fp);
2993 rc = put_entry(key, 1, len, fp);
3000 static int user_write(void *vkey, void *datum, void *ptr)
3003 struct user_datum *usrdatum = datum;
3004 struct policy_data *pd = ptr;
3005 struct policydb *p = pd->p;
3013 buf[items++] = cpu_to_le32(len);
3014 buf[items++] = cpu_to_le32(usrdatum->value);
3015 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
3016 buf[items++] = cpu_to_le32(usrdatum->bounds);
3017 BUG_ON(items > ARRAY_SIZE(buf));
3018 rc = put_entry(buf, sizeof(u32), items, fp);
3022 rc = put_entry(key, 1, len, fp);
3026 rc = ebitmap_write(&usrdatum->roles, fp);
3030 rc = mls_write_range_helper(&usrdatum->range, fp);
3034 rc = mls_write_level(&usrdatum->dfltlevel, fp);
3041 static int (*write_f[SYM_NUM]) (void *key, void *datum,
3054 static int ocontext_write(struct policydb *p, struct policydb_compat_info *info,
3057 unsigned int i, j, rc;
3062 for (i = 0; i < info->ocon_num; i++) {
3064 for (c = p->ocontexts[i]; c; c = c->next)
3066 buf[0] = cpu_to_le32(nel);
3067 rc = put_entry(buf, sizeof(u32), 1, fp);
3070 for (c = p->ocontexts[i]; c; c = c->next) {
3073 buf[0] = cpu_to_le32(c->sid[0]);
3074 rc = put_entry(buf, sizeof(u32), 1, fp);
3077 rc = context_write(p, &c->context[0], fp);
3083 len = strlen(c->u.name);
3084 buf[0] = cpu_to_le32(len);
3085 rc = put_entry(buf, sizeof(u32), 1, fp);
3088 rc = put_entry(c->u.name, 1, len, fp);
3091 rc = context_write(p, &c->context[0], fp);
3094 rc = context_write(p, &c->context[1], fp);
3099 buf[0] = cpu_to_le32(c->u.port.protocol);
3100 buf[1] = cpu_to_le32(c->u.port.low_port);
3101 buf[2] = cpu_to_le32(c->u.port.high_port);
3102 rc = put_entry(buf, sizeof(u32), 3, fp);
3105 rc = context_write(p, &c->context[0], fp);
3110 nodebuf[0] = c->u.node.addr; /* network order */
3111 nodebuf[1] = c->u.node.mask; /* network order */
3112 rc = put_entry(nodebuf, sizeof(u32), 2, fp);
3115 rc = context_write(p, &c->context[0], fp);
3120 buf[0] = cpu_to_le32(c->v.behavior);
3121 len = strlen(c->u.name);
3122 buf[1] = cpu_to_le32(len);
3123 rc = put_entry(buf, sizeof(u32), 2, fp);
3126 rc = put_entry(c->u.name, 1, len, fp);
3129 rc = context_write(p, &c->context[0], fp);
3134 for (j = 0; j < 4; j++)
3135 nodebuf[j] = c->u.node6.addr[j]; /* network order */
3136 for (j = 0; j < 4; j++)
3137 nodebuf[j + 4] = c->u.node6.mask[j]; /* network order */
3138 rc = put_entry(nodebuf, sizeof(u32), 8, fp);
3141 rc = context_write(p, &c->context[0], fp);
3151 static int genfs_write(struct policydb *p, void *fp)
3153 struct genfs *genfs;
3160 for (genfs = p->genfs; genfs; genfs = genfs->next)
3162 buf[0] = cpu_to_le32(len);
3163 rc = put_entry(buf, sizeof(u32), 1, fp);
3166 for (genfs = p->genfs; genfs; genfs = genfs->next) {
3167 len = strlen(genfs->fstype);
3168 buf[0] = cpu_to_le32(len);
3169 rc = put_entry(buf, sizeof(u32), 1, fp);
3172 rc = put_entry(genfs->fstype, 1, len, fp);
3176 for (c = genfs->head; c; c = c->next)
3178 buf[0] = cpu_to_le32(len);
3179 rc = put_entry(buf, sizeof(u32), 1, fp);
3182 for (c = genfs->head; c; c = c->next) {
3183 len = strlen(c->u.name);
3184 buf[0] = cpu_to_le32(len);
3185 rc = put_entry(buf, sizeof(u32), 1, fp);
3188 rc = put_entry(c->u.name, 1, len, fp);
3191 buf[0] = cpu_to_le32(c->v.sclass);
3192 rc = put_entry(buf, sizeof(u32), 1, fp);
3195 rc = context_write(p, &c->context[0], fp);
3203 static int hashtab_cnt(void *key, void *data, void *ptr)
3211 static int range_write_helper(void *key, void *data, void *ptr)
3214 struct range_trans *rt = key;
3215 struct mls_range *r = data;
3216 struct policy_data *pd = ptr;
3218 struct policydb *p = pd->p;
3221 buf[0] = cpu_to_le32(rt->source_type);
3222 buf[1] = cpu_to_le32(rt->target_type);
3223 rc = put_entry(buf, sizeof(u32), 2, fp);
3226 if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) {
3227 buf[0] = cpu_to_le32(rt->target_class);
3228 rc = put_entry(buf, sizeof(u32), 1, fp);
3232 rc = mls_write_range_helper(r, fp);
3239 static int range_write(struct policydb *p, void *fp)
3243 struct policy_data pd;
3248 /* count the number of entries in the hashtab */
3250 rc = hashtab_map(p->range_tr, hashtab_cnt, &nel);
3254 buf[0] = cpu_to_le32(nel);
3255 rc = put_entry(buf, sizeof(u32), 1, fp);
3259 /* actually write all of the entries */
3260 rc = hashtab_map(p->range_tr, range_write_helper, &pd);
3267 static int filename_write_helper(void *key, void *data, void *ptr)
3270 struct filename_trans *ft = key;
3271 struct filename_trans_datum *otype = data;
3276 len = strlen(ft->name);
3277 buf[0] = cpu_to_le32(len);
3278 rc = put_entry(buf, sizeof(u32), 1, fp);
3282 rc = put_entry(ft->name, sizeof(char), len, fp);
3286 buf[0] = cpu_to_le32(ft->stype);
3287 buf[1] = cpu_to_le32(ft->ttype);
3288 buf[2] = cpu_to_le32(ft->tclass);
3289 buf[3] = cpu_to_le32(otype->otype);
3291 rc = put_entry(buf, sizeof(u32), 4, fp);
3298 static int filename_trans_write(struct policydb *p, void *fp)
3304 if (p->policyvers < POLICYDB_VERSION_FILENAME_TRANS)
3308 rc = hashtab_map(p->filename_trans, hashtab_cnt, &nel);
3312 buf[0] = cpu_to_le32(nel);
3313 rc = put_entry(buf, sizeof(u32), 1, fp);
3317 rc = hashtab_map(p->filename_trans, filename_write_helper, fp);
3325 * Write the configuration data in a policy database
3326 * structure to a policy database binary representation
3329 int policydb_write(struct policydb *p, void *fp)
3331 unsigned int i, num_syms;
3336 struct policydb_compat_info *info;
3339 * refuse to write policy older than compressed avtab
3340 * to simplify the writer. There are other tests dropped
3341 * since we assume this throughout the writer code. Be
3342 * careful if you ever try to remove this restriction
3344 if (p->policyvers < POLICYDB_VERSION_AVTAB) {
3345 printk(KERN_ERR "SELinux: refusing to write policy version %d."
3346 " Because it is less than version %d\n", p->policyvers,
3347 POLICYDB_VERSION_AVTAB);
3353 config |= POLICYDB_CONFIG_MLS;
3355 if (p->reject_unknown)
3356 config |= REJECT_UNKNOWN;
3357 if (p->allow_unknown)
3358 config |= ALLOW_UNKNOWN;
3360 /* Write the magic number and string identifiers. */
3361 buf[0] = cpu_to_le32(POLICYDB_MAGIC);
3362 len = strlen(POLICYDB_STRING);
3363 buf[1] = cpu_to_le32(len);
3364 rc = put_entry(buf, sizeof(u32), 2, fp);
3367 rc = put_entry(POLICYDB_STRING, 1, len, fp);
3371 /* Write the version, config, and table sizes. */
3372 info = policydb_lookup_compat(p->policyvers);
3374 printk(KERN_ERR "SELinux: compatibility lookup failed for policy "
3375 "version %d", p->policyvers);
3379 buf[0] = cpu_to_le32(p->policyvers);
3380 buf[1] = cpu_to_le32(config);
3381 buf[2] = cpu_to_le32(info->sym_num);
3382 buf[3] = cpu_to_le32(info->ocon_num);
3384 rc = put_entry(buf, sizeof(u32), 4, fp);
3388 if (p->policyvers >= POLICYDB_VERSION_POLCAP) {
3389 rc = ebitmap_write(&p->policycaps, fp);
3394 if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE) {
3395 rc = ebitmap_write(&p->permissive_map, fp);
3400 num_syms = info->sym_num;
3401 for (i = 0; i < num_syms; i++) {
3402 struct policy_data pd;
3407 buf[0] = cpu_to_le32(p->symtab[i].nprim);
3408 buf[1] = cpu_to_le32(p->symtab[i].table->nel);
3410 rc = put_entry(buf, sizeof(u32), 2, fp);
3413 rc = hashtab_map(p->symtab[i].table, write_f[i], &pd);
3418 rc = avtab_write(p, &p->te_avtab, fp);
3422 rc = cond_write_list(p, p->cond_list, fp);
3426 rc = role_trans_write(p, fp);
3430 rc = role_allow_write(p->role_allow, fp);
3434 rc = filename_trans_write(p, fp);
3438 rc = ocontext_write(p, info, fp);
3442 rc = genfs_write(p, fp);
3446 rc = range_write(p, fp);
3450 for (i = 0; i < p->p_types.nprim; i++) {
3451 struct ebitmap *e = flex_array_get(p->type_attr_map_array, i);
3454 rc = ebitmap_write(e, fp);