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.moore@hp.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,
138 static struct policydb_compat_info *policydb_lookup_compat(int version)
141 struct policydb_compat_info *info = NULL;
143 for (i = 0; i < ARRAY_SIZE(policydb_compat); i++) {
144 if (policydb_compat[i].version == version) {
145 info = &policydb_compat[i];
153 * Initialize the role table.
155 static int roles_init(struct policydb *p)
159 struct role_datum *role;
162 role = kzalloc(sizeof(*role), GFP_KERNEL);
167 role->value = ++p->p_roles.nprim;
168 if (role->value != OBJECT_R_VAL)
172 key = kstrdup(OBJECT_R, GFP_KERNEL);
176 rc = hashtab_insert(p->p_roles.table, key, role);
187 static u32 filenametr_hash(struct hashtab *h, const void *k)
189 const struct filename_trans *ft = k;
191 unsigned int byte_num;
194 hash = ft->stype ^ ft->ttype ^ ft->tclass;
197 while ((focus = ft->name[byte_num++]))
198 hash = partial_name_hash(focus, hash);
199 return hash & (h->size - 1);
202 static int filenametr_cmp(struct hashtab *h, const void *k1, const void *k2)
204 const struct filename_trans *ft1 = k1;
205 const struct filename_trans *ft2 = k2;
208 v = ft1->stype - ft2->stype;
212 v = ft1->ttype - ft2->ttype;
216 v = ft1->tclass - ft2->tclass;
220 return strcmp(ft1->name, ft2->name);
224 static u32 rangetr_hash(struct hashtab *h, const void *k)
226 const struct range_trans *key = k;
227 return (key->source_type + (key->target_type << 3) +
228 (key->target_class << 5)) & (h->size - 1);
231 static int rangetr_cmp(struct hashtab *h, const void *k1, const void *k2)
233 const struct range_trans *key1 = k1, *key2 = k2;
236 v = key1->source_type - key2->source_type;
240 v = key1->target_type - key2->target_type;
244 v = key1->target_class - key2->target_class;
250 * Initialize a policy database structure.
252 static int policydb_init(struct policydb *p)
256 memset(p, 0, sizeof(*p));
258 for (i = 0; i < SYM_NUM; i++) {
259 rc = symtab_init(&p->symtab[i], symtab_sizes[i]);
264 rc = avtab_init(&p->te_avtab);
272 rc = cond_policydb_init(p);
276 p->filename_trans = hashtab_create(filenametr_hash, filenametr_cmp, (1 << 10));
277 if (!p->filename_trans)
280 p->range_tr = hashtab_create(rangetr_hash, rangetr_cmp, 256);
284 ebitmap_init(&p->filename_trans_ttypes);
285 ebitmap_init(&p->policycaps);
286 ebitmap_init(&p->permissive_map);
290 hashtab_destroy(p->filename_trans);
291 hashtab_destroy(p->range_tr);
292 for (i = 0; i < SYM_NUM; i++)
293 hashtab_destroy(p->symtab[i].table);
298 * The following *_index functions are used to
299 * define the val_to_name and val_to_struct arrays
300 * in a policy database structure. The val_to_name
301 * arrays are used when converting security context
302 * structures into string representations. The
303 * val_to_struct arrays are used when the attributes
304 * of a class, role, or user are needed.
307 static int common_index(void *key, void *datum, void *datap)
310 struct common_datum *comdatum;
311 struct flex_array *fa;
315 if (!comdatum->value || comdatum->value > p->p_commons.nprim)
318 fa = p->sym_val_to_name[SYM_COMMONS];
319 if (flex_array_put_ptr(fa, comdatum->value - 1, key,
320 GFP_KERNEL | __GFP_ZERO))
325 static int class_index(void *key, void *datum, void *datap)
328 struct class_datum *cladatum;
329 struct flex_array *fa;
333 if (!cladatum->value || cladatum->value > p->p_classes.nprim)
335 fa = p->sym_val_to_name[SYM_CLASSES];
336 if (flex_array_put_ptr(fa, cladatum->value - 1, key,
337 GFP_KERNEL | __GFP_ZERO))
339 p->class_val_to_struct[cladatum->value - 1] = cladatum;
343 static int role_index(void *key, void *datum, void *datap)
346 struct role_datum *role;
347 struct flex_array *fa;
352 || role->value > p->p_roles.nprim
353 || role->bounds > p->p_roles.nprim)
356 fa = p->sym_val_to_name[SYM_ROLES];
357 if (flex_array_put_ptr(fa, role->value - 1, key,
358 GFP_KERNEL | __GFP_ZERO))
360 p->role_val_to_struct[role->value - 1] = role;
364 static int type_index(void *key, void *datum, void *datap)
367 struct type_datum *typdatum;
368 struct flex_array *fa;
373 if (typdatum->primary) {
375 || typdatum->value > p->p_types.nprim
376 || typdatum->bounds > p->p_types.nprim)
378 fa = p->sym_val_to_name[SYM_TYPES];
379 if (flex_array_put_ptr(fa, typdatum->value - 1, key,
380 GFP_KERNEL | __GFP_ZERO))
383 fa = p->type_val_to_struct_array;
384 if (flex_array_put_ptr(fa, typdatum->value - 1, typdatum,
385 GFP_KERNEL | __GFP_ZERO))
392 static int user_index(void *key, void *datum, void *datap)
395 struct user_datum *usrdatum;
396 struct flex_array *fa;
401 || usrdatum->value > p->p_users.nprim
402 || usrdatum->bounds > p->p_users.nprim)
405 fa = p->sym_val_to_name[SYM_USERS];
406 if (flex_array_put_ptr(fa, usrdatum->value - 1, key,
407 GFP_KERNEL | __GFP_ZERO))
409 p->user_val_to_struct[usrdatum->value - 1] = usrdatum;
413 static int sens_index(void *key, void *datum, void *datap)
416 struct level_datum *levdatum;
417 struct flex_array *fa;
422 if (!levdatum->isalias) {
423 if (!levdatum->level->sens ||
424 levdatum->level->sens > p->p_levels.nprim)
426 fa = p->sym_val_to_name[SYM_LEVELS];
427 if (flex_array_put_ptr(fa, levdatum->level->sens - 1, key,
428 GFP_KERNEL | __GFP_ZERO))
435 static int cat_index(void *key, void *datum, void *datap)
438 struct cat_datum *catdatum;
439 struct flex_array *fa;
444 if (!catdatum->isalias) {
445 if (!catdatum->value || catdatum->value > p->p_cats.nprim)
447 fa = p->sym_val_to_name[SYM_CATS];
448 if (flex_array_put_ptr(fa, catdatum->value - 1, key,
449 GFP_KERNEL | __GFP_ZERO))
456 static int (*index_f[SYM_NUM]) (void *key, void *datum, void *datap) =
469 static void hash_eval(struct hashtab *h, const char *hash_name)
471 struct hashtab_info info;
473 hashtab_stat(h, &info);
474 printk(KERN_DEBUG "SELinux: %s: %d entries and %d/%d buckets used, "
475 "longest chain length %d\n", hash_name, h->nel,
476 info.slots_used, h->size, info.max_chain_len);
479 static void symtab_hash_eval(struct symtab *s)
483 for (i = 0; i < SYM_NUM; i++)
484 hash_eval(s[i].table, symtab_name[i]);
488 static inline void hash_eval(struct hashtab *h, char *hash_name)
494 * Define the other val_to_name and val_to_struct arrays
495 * in a policy database structure.
497 * Caller must clean up on failure.
499 static int policydb_index(struct policydb *p)
503 printk(KERN_DEBUG "SELinux: %d users, %d roles, %d types, %d bools",
504 p->p_users.nprim, p->p_roles.nprim, p->p_types.nprim, p->p_bools.nprim);
506 printk(", %d sens, %d cats", p->p_levels.nprim,
510 printk(KERN_DEBUG "SELinux: %d classes, %d rules\n",
511 p->p_classes.nprim, p->te_avtab.nel);
514 avtab_hash_eval(&p->te_avtab, "rules");
515 symtab_hash_eval(p->symtab);
519 p->class_val_to_struct =
520 kmalloc(p->p_classes.nprim * sizeof(*(p->class_val_to_struct)),
522 if (!p->class_val_to_struct)
526 p->role_val_to_struct =
527 kmalloc(p->p_roles.nprim * sizeof(*(p->role_val_to_struct)),
529 if (!p->role_val_to_struct)
533 p->user_val_to_struct =
534 kmalloc(p->p_users.nprim * sizeof(*(p->user_val_to_struct)),
536 if (!p->user_val_to_struct)
539 /* Yes, I want the sizeof the pointer, not the structure */
541 p->type_val_to_struct_array = flex_array_alloc(sizeof(struct type_datum *),
543 GFP_KERNEL | __GFP_ZERO);
544 if (!p->type_val_to_struct_array)
547 rc = flex_array_prealloc(p->type_val_to_struct_array, 0,
548 p->p_types.nprim - 1, GFP_KERNEL | __GFP_ZERO);
552 rc = cond_init_bool_indexes(p);
556 for (i = 0; i < SYM_NUM; i++) {
558 p->sym_val_to_name[i] = flex_array_alloc(sizeof(char *),
560 GFP_KERNEL | __GFP_ZERO);
561 if (!p->sym_val_to_name[i])
564 rc = flex_array_prealloc(p->sym_val_to_name[i],
565 0, p->symtab[i].nprim - 1,
566 GFP_KERNEL | __GFP_ZERO);
570 rc = hashtab_map(p->symtab[i].table, index_f[i], p);
580 * The following *_destroy functions are used to
581 * free any memory allocated for each kind of
582 * symbol data in the policy database.
585 static int perm_destroy(void *key, void *datum, void *p)
592 static int common_destroy(void *key, void *datum, void *p)
594 struct common_datum *comdatum;
599 hashtab_map(comdatum->permissions.table, perm_destroy, NULL);
600 hashtab_destroy(comdatum->permissions.table);
606 static int cls_destroy(void *key, void *datum, void *p)
608 struct class_datum *cladatum;
609 struct constraint_node *constraint, *ctemp;
610 struct constraint_expr *e, *etmp;
615 hashtab_map(cladatum->permissions.table, perm_destroy, NULL);
616 hashtab_destroy(cladatum->permissions.table);
617 constraint = cladatum->constraints;
619 e = constraint->expr;
621 ebitmap_destroy(&e->names);
627 constraint = constraint->next;
631 constraint = cladatum->validatetrans;
633 e = constraint->expr;
635 ebitmap_destroy(&e->names);
641 constraint = constraint->next;
645 kfree(cladatum->comkey);
651 static int role_destroy(void *key, void *datum, void *p)
653 struct role_datum *role;
658 ebitmap_destroy(&role->dominates);
659 ebitmap_destroy(&role->types);
665 static int type_destroy(void *key, void *datum, void *p)
672 static int user_destroy(void *key, void *datum, void *p)
674 struct user_datum *usrdatum;
679 ebitmap_destroy(&usrdatum->roles);
680 ebitmap_destroy(&usrdatum->range.level[0].cat);
681 ebitmap_destroy(&usrdatum->range.level[1].cat);
682 ebitmap_destroy(&usrdatum->dfltlevel.cat);
688 static int sens_destroy(void *key, void *datum, void *p)
690 struct level_datum *levdatum;
695 ebitmap_destroy(&levdatum->level->cat);
696 kfree(levdatum->level);
702 static int cat_destroy(void *key, void *datum, void *p)
709 static int (*destroy_f[SYM_NUM]) (void *key, void *datum, void *datap) =
721 static int filenametr_destroy(void *key, void *datum, void *p)
723 struct filename_trans *ft = key;
731 static int range_tr_destroy(void *key, void *datum, void *p)
733 struct mls_range *rt = datum;
735 ebitmap_destroy(&rt->level[0].cat);
736 ebitmap_destroy(&rt->level[1].cat);
742 static void ocontext_destroy(struct ocontext *c, int i)
747 context_destroy(&c->context[0]);
748 context_destroy(&c->context[1]);
749 if (i == OCON_ISID || i == OCON_FS ||
750 i == OCON_NETIF || i == OCON_FSUSE)
756 * Free any memory allocated by a policy database structure.
758 void policydb_destroy(struct policydb *p)
760 struct ocontext *c, *ctmp;
761 struct genfs *g, *gtmp;
763 struct role_allow *ra, *lra = NULL;
764 struct role_trans *tr, *ltr = NULL;
766 for (i = 0; i < SYM_NUM; i++) {
768 hashtab_map(p->symtab[i].table, destroy_f[i], NULL);
769 hashtab_destroy(p->symtab[i].table);
772 for (i = 0; i < SYM_NUM; i++) {
773 if (p->sym_val_to_name[i])
774 flex_array_free(p->sym_val_to_name[i]);
777 kfree(p->class_val_to_struct);
778 kfree(p->role_val_to_struct);
779 kfree(p->user_val_to_struct);
780 if (p->type_val_to_struct_array)
781 flex_array_free(p->type_val_to_struct_array);
783 avtab_destroy(&p->te_avtab);
785 for (i = 0; i < OCON_NUM; i++) {
791 ocontext_destroy(ctmp, i);
793 p->ocontexts[i] = NULL;
804 ocontext_destroy(ctmp, OCON_FSUSE);
812 cond_policydb_destroy(p);
814 for (tr = p->role_tr; tr; tr = tr->next) {
821 for (ra = p->role_allow; ra; ra = ra->next) {
828 hashtab_map(p->filename_trans, filenametr_destroy, NULL);
829 hashtab_destroy(p->filename_trans);
831 hashtab_map(p->range_tr, range_tr_destroy, NULL);
832 hashtab_destroy(p->range_tr);
834 if (p->type_attr_map_array) {
835 for (i = 0; i < p->p_types.nprim; i++) {
838 e = flex_array_get(p->type_attr_map_array, i);
843 flex_array_free(p->type_attr_map_array);
846 ebitmap_destroy(&p->filename_trans_ttypes);
847 ebitmap_destroy(&p->policycaps);
848 ebitmap_destroy(&p->permissive_map);
854 * Load the initial SIDs specified in a policy database
855 * structure into a SID table.
857 int policydb_load_isids(struct policydb *p, struct sidtab *s)
859 struct ocontext *head, *c;
864 printk(KERN_ERR "SELinux: out of memory on SID table init\n");
868 head = p->ocontexts[OCON_ISID];
869 for (c = head; c; c = c->next) {
871 if (!c->context[0].user) {
872 printk(KERN_ERR "SELinux: SID %s was never defined.\n",
877 rc = sidtab_insert(s, c->sid[0], &c->context[0]);
879 printk(KERN_ERR "SELinux: unable to load initial SID %s.\n",
889 int policydb_class_isvalid(struct policydb *p, unsigned int class)
891 if (!class || class > p->p_classes.nprim)
896 int policydb_role_isvalid(struct policydb *p, unsigned int role)
898 if (!role || role > p->p_roles.nprim)
903 int policydb_type_isvalid(struct policydb *p, unsigned int type)
905 if (!type || type > p->p_types.nprim)
911 * Return 1 if the fields in the security context
912 * structure `c' are valid. Return 0 otherwise.
914 int policydb_context_isvalid(struct policydb *p, struct context *c)
916 struct role_datum *role;
917 struct user_datum *usrdatum;
919 if (!c->role || c->role > p->p_roles.nprim)
922 if (!c->user || c->user > p->p_users.nprim)
925 if (!c->type || c->type > p->p_types.nprim)
928 if (c->role != OBJECT_R_VAL) {
930 * Role must be authorized for the type.
932 role = p->role_val_to_struct[c->role - 1];
933 if (!ebitmap_get_bit(&role->types, c->type - 1))
934 /* role may not be associated with type */
938 * User must be authorized for the role.
940 usrdatum = p->user_val_to_struct[c->user - 1];
944 if (!ebitmap_get_bit(&usrdatum->roles, c->role - 1))
945 /* user may not be associated with role */
949 if (!mls_context_isvalid(p, c))
956 * Read a MLS range structure from a policydb binary
957 * representation file.
959 static int mls_read_range_helper(struct mls_range *r, void *fp)
965 rc = next_entry(buf, fp, sizeof(u32));
970 items = le32_to_cpu(buf[0]);
971 if (items > ARRAY_SIZE(buf)) {
972 printk(KERN_ERR "SELinux: mls: range overflow\n");
976 rc = next_entry(buf, fp, sizeof(u32) * items);
978 printk(KERN_ERR "SELinux: mls: truncated range\n");
982 r->level[0].sens = le32_to_cpu(buf[0]);
984 r->level[1].sens = le32_to_cpu(buf[1]);
986 r->level[1].sens = r->level[0].sens;
988 rc = ebitmap_read(&r->level[0].cat, fp);
990 printk(KERN_ERR "SELinux: mls: error reading low categories\n");
994 rc = ebitmap_read(&r->level[1].cat, fp);
996 printk(KERN_ERR "SELinux: mls: error reading high categories\n");
1000 rc = ebitmap_cpy(&r->level[1].cat, &r->level[0].cat);
1002 printk(KERN_ERR "SELinux: mls: out of memory\n");
1009 ebitmap_destroy(&r->level[0].cat);
1015 * Read and validate a security context structure
1016 * from a policydb binary representation file.
1018 static int context_read_and_validate(struct context *c,
1025 rc = next_entry(buf, fp, sizeof buf);
1027 printk(KERN_ERR "SELinux: context truncated\n");
1030 c->user = le32_to_cpu(buf[0]);
1031 c->role = le32_to_cpu(buf[1]);
1032 c->type = le32_to_cpu(buf[2]);
1033 if (p->policyvers >= POLICYDB_VERSION_MLS) {
1034 rc = mls_read_range_helper(&c->range, fp);
1036 printk(KERN_ERR "SELinux: error reading MLS range of context\n");
1042 if (!policydb_context_isvalid(p, c)) {
1043 printk(KERN_ERR "SELinux: invalid security context\n");
1053 * The following *_read functions are used to
1054 * read the symbol data from a policy database
1055 * binary representation file.
1058 static int perm_read(struct policydb *p, struct hashtab *h, void *fp)
1061 struct perm_datum *perdatum;
1067 perdatum = kzalloc(sizeof(*perdatum), GFP_KERNEL);
1071 rc = next_entry(buf, fp, sizeof buf);
1075 len = le32_to_cpu(buf[0]);
1076 perdatum->value = le32_to_cpu(buf[1]);
1079 key = kmalloc(len + 1, GFP_KERNEL);
1083 rc = next_entry(key, fp, len);
1088 rc = hashtab_insert(h, key, perdatum);
1094 perm_destroy(key, perdatum, NULL);
1098 static int common_read(struct policydb *p, struct hashtab *h, void *fp)
1101 struct common_datum *comdatum;
1107 comdatum = kzalloc(sizeof(*comdatum), GFP_KERNEL);
1111 rc = next_entry(buf, fp, sizeof buf);
1115 len = le32_to_cpu(buf[0]);
1116 comdatum->value = le32_to_cpu(buf[1]);
1118 rc = symtab_init(&comdatum->permissions, PERM_SYMTAB_SIZE);
1121 comdatum->permissions.nprim = le32_to_cpu(buf[2]);
1122 nel = le32_to_cpu(buf[3]);
1125 key = kmalloc(len + 1, GFP_KERNEL);
1129 rc = next_entry(key, fp, len);
1134 for (i = 0; i < nel; i++) {
1135 rc = perm_read(p, comdatum->permissions.table, fp);
1140 rc = hashtab_insert(h, key, comdatum);
1145 common_destroy(key, comdatum, NULL);
1149 static int read_cons_helper(struct constraint_node **nodep, int ncons,
1150 int allowxtarget, void *fp)
1152 struct constraint_node *c, *lc;
1153 struct constraint_expr *e, *le;
1156 int rc, i, j, depth;
1159 for (i = 0; i < ncons; i++) {
1160 c = kzalloc(sizeof(*c), GFP_KERNEL);
1169 rc = next_entry(buf, fp, (sizeof(u32) * 2));
1172 c->permissions = le32_to_cpu(buf[0]);
1173 nexpr = le32_to_cpu(buf[1]);
1176 for (j = 0; j < nexpr; j++) {
1177 e = kzalloc(sizeof(*e), GFP_KERNEL);
1186 rc = next_entry(buf, fp, (sizeof(u32) * 3));
1189 e->expr_type = le32_to_cpu(buf[0]);
1190 e->attr = le32_to_cpu(buf[1]);
1191 e->op = le32_to_cpu(buf[2]);
1193 switch (e->expr_type) {
1205 if (depth == (CEXPR_MAXDEPTH - 1))
1210 if (!allowxtarget && (e->attr & CEXPR_XTARGET))
1212 if (depth == (CEXPR_MAXDEPTH - 1))
1215 rc = ebitmap_read(&e->names, fp);
1232 static int class_read(struct policydb *p, struct hashtab *h, void *fp)
1235 struct class_datum *cladatum;
1237 u32 len, len2, ncons, nel;
1241 cladatum = kzalloc(sizeof(*cladatum), GFP_KERNEL);
1245 rc = next_entry(buf, fp, sizeof(u32)*6);
1249 len = le32_to_cpu(buf[0]);
1250 len2 = le32_to_cpu(buf[1]);
1251 cladatum->value = le32_to_cpu(buf[2]);
1253 rc = symtab_init(&cladatum->permissions, PERM_SYMTAB_SIZE);
1256 cladatum->permissions.nprim = le32_to_cpu(buf[3]);
1257 nel = le32_to_cpu(buf[4]);
1259 ncons = le32_to_cpu(buf[5]);
1262 key = kmalloc(len + 1, GFP_KERNEL);
1266 rc = next_entry(key, fp, len);
1273 cladatum->comkey = kmalloc(len2 + 1, GFP_KERNEL);
1274 if (!cladatum->comkey)
1276 rc = next_entry(cladatum->comkey, fp, len2);
1279 cladatum->comkey[len2] = '\0';
1282 cladatum->comdatum = hashtab_search(p->p_commons.table, cladatum->comkey);
1283 if (!cladatum->comdatum) {
1284 printk(KERN_ERR "SELinux: unknown common %s\n", cladatum->comkey);
1288 for (i = 0; i < nel; i++) {
1289 rc = perm_read(p, cladatum->permissions.table, fp);
1294 rc = read_cons_helper(&cladatum->constraints, ncons, 0, fp);
1298 if (p->policyvers >= POLICYDB_VERSION_VALIDATETRANS) {
1299 /* grab the validatetrans rules */
1300 rc = next_entry(buf, fp, sizeof(u32));
1303 ncons = le32_to_cpu(buf[0]);
1304 rc = read_cons_helper(&cladatum->validatetrans, ncons, 1, fp);
1309 rc = hashtab_insert(h, key, cladatum);
1315 cls_destroy(key, cladatum, NULL);
1319 static int role_read(struct policydb *p, struct hashtab *h, void *fp)
1322 struct role_datum *role;
1323 int rc, to_read = 2;
1328 role = kzalloc(sizeof(*role), GFP_KERNEL);
1332 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1335 rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1339 len = le32_to_cpu(buf[0]);
1340 role->value = le32_to_cpu(buf[1]);
1341 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1342 role->bounds = le32_to_cpu(buf[2]);
1345 key = kmalloc(len + 1, GFP_KERNEL);
1349 rc = next_entry(key, fp, len);
1354 rc = ebitmap_read(&role->dominates, fp);
1358 rc = ebitmap_read(&role->types, fp);
1362 if (strcmp(key, OBJECT_R) == 0) {
1364 if (role->value != OBJECT_R_VAL) {
1365 printk(KERN_ERR "SELinux: Role %s has wrong value %d\n",
1366 OBJECT_R, role->value);
1373 rc = hashtab_insert(h, key, role);
1378 role_destroy(key, role, NULL);
1382 static int type_read(struct policydb *p, struct hashtab *h, void *fp)
1385 struct type_datum *typdatum;
1386 int rc, to_read = 3;
1391 typdatum = kzalloc(sizeof(*typdatum), GFP_KERNEL);
1395 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1398 rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1402 len = le32_to_cpu(buf[0]);
1403 typdatum->value = le32_to_cpu(buf[1]);
1404 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) {
1405 u32 prop = le32_to_cpu(buf[2]);
1407 if (prop & TYPEDATUM_PROPERTY_PRIMARY)
1408 typdatum->primary = 1;
1409 if (prop & TYPEDATUM_PROPERTY_ATTRIBUTE)
1410 typdatum->attribute = 1;
1412 typdatum->bounds = le32_to_cpu(buf[3]);
1414 typdatum->primary = le32_to_cpu(buf[2]);
1418 key = kmalloc(len + 1, GFP_KERNEL);
1421 rc = next_entry(key, fp, len);
1426 rc = hashtab_insert(h, key, typdatum);
1431 type_destroy(key, typdatum, NULL);
1437 * Read a MLS level structure from a policydb binary
1438 * representation file.
1440 static int mls_read_level(struct mls_level *lp, void *fp)
1445 memset(lp, 0, sizeof(*lp));
1447 rc = next_entry(buf, fp, sizeof buf);
1449 printk(KERN_ERR "SELinux: mls: truncated level\n");
1452 lp->sens = le32_to_cpu(buf[0]);
1454 rc = ebitmap_read(&lp->cat, fp);
1456 printk(KERN_ERR "SELinux: mls: error reading level categories\n");
1462 static int user_read(struct policydb *p, struct hashtab *h, void *fp)
1465 struct user_datum *usrdatum;
1466 int rc, to_read = 2;
1471 usrdatum = kzalloc(sizeof(*usrdatum), GFP_KERNEL);
1475 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1478 rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1482 len = le32_to_cpu(buf[0]);
1483 usrdatum->value = le32_to_cpu(buf[1]);
1484 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1485 usrdatum->bounds = le32_to_cpu(buf[2]);
1488 key = kmalloc(len + 1, GFP_KERNEL);
1491 rc = next_entry(key, fp, len);
1496 rc = ebitmap_read(&usrdatum->roles, fp);
1500 if (p->policyvers >= POLICYDB_VERSION_MLS) {
1501 rc = mls_read_range_helper(&usrdatum->range, fp);
1504 rc = mls_read_level(&usrdatum->dfltlevel, fp);
1509 rc = hashtab_insert(h, key, usrdatum);
1514 user_destroy(key, usrdatum, NULL);
1518 static int sens_read(struct policydb *p, struct hashtab *h, void *fp)
1521 struct level_datum *levdatum;
1527 levdatum = kzalloc(sizeof(*levdatum), GFP_ATOMIC);
1531 rc = next_entry(buf, fp, sizeof buf);
1535 len = le32_to_cpu(buf[0]);
1536 levdatum->isalias = le32_to_cpu(buf[1]);
1539 key = kmalloc(len + 1, GFP_ATOMIC);
1542 rc = next_entry(key, fp, len);
1548 levdatum->level = kmalloc(sizeof(struct mls_level), GFP_ATOMIC);
1549 if (!levdatum->level)
1552 rc = mls_read_level(levdatum->level, fp);
1556 rc = hashtab_insert(h, key, levdatum);
1561 sens_destroy(key, levdatum, NULL);
1565 static int cat_read(struct policydb *p, struct hashtab *h, void *fp)
1568 struct cat_datum *catdatum;
1574 catdatum = kzalloc(sizeof(*catdatum), GFP_ATOMIC);
1578 rc = next_entry(buf, fp, sizeof buf);
1582 len = le32_to_cpu(buf[0]);
1583 catdatum->value = le32_to_cpu(buf[1]);
1584 catdatum->isalias = le32_to_cpu(buf[2]);
1587 key = kmalloc(len + 1, GFP_ATOMIC);
1590 rc = next_entry(key, fp, len);
1595 rc = hashtab_insert(h, key, catdatum);
1600 cat_destroy(key, catdatum, NULL);
1604 static int (*read_f[SYM_NUM]) (struct policydb *p, struct hashtab *h, void *fp) =
1616 static int user_bounds_sanity_check(void *key, void *datum, void *datap)
1618 struct user_datum *upper, *user;
1619 struct policydb *p = datap;
1622 upper = user = datum;
1623 while (upper->bounds) {
1624 struct ebitmap_node *node;
1627 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1628 printk(KERN_ERR "SELinux: user %s: "
1629 "too deep or looped boundary",
1634 upper = p->user_val_to_struct[upper->bounds - 1];
1635 ebitmap_for_each_positive_bit(&user->roles, node, bit) {
1636 if (ebitmap_get_bit(&upper->roles, bit))
1640 "SELinux: boundary violated policy: "
1641 "user=%s role=%s bounds=%s\n",
1642 sym_name(p, SYM_USERS, user->value - 1),
1643 sym_name(p, SYM_ROLES, bit),
1644 sym_name(p, SYM_USERS, upper->value - 1));
1653 static int role_bounds_sanity_check(void *key, void *datum, void *datap)
1655 struct role_datum *upper, *role;
1656 struct policydb *p = datap;
1659 upper = role = datum;
1660 while (upper->bounds) {
1661 struct ebitmap_node *node;
1664 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1665 printk(KERN_ERR "SELinux: role %s: "
1666 "too deep or looped bounds\n",
1671 upper = p->role_val_to_struct[upper->bounds - 1];
1672 ebitmap_for_each_positive_bit(&role->types, node, bit) {
1673 if (ebitmap_get_bit(&upper->types, bit))
1677 "SELinux: boundary violated policy: "
1678 "role=%s type=%s bounds=%s\n",
1679 sym_name(p, SYM_ROLES, role->value - 1),
1680 sym_name(p, SYM_TYPES, bit),
1681 sym_name(p, SYM_ROLES, upper->value - 1));
1690 static int type_bounds_sanity_check(void *key, void *datum, void *datap)
1692 struct type_datum *upper;
1693 struct policydb *p = datap;
1697 while (upper->bounds) {
1698 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1699 printk(KERN_ERR "SELinux: type %s: "
1700 "too deep or looped boundary\n",
1705 upper = flex_array_get_ptr(p->type_val_to_struct_array,
1709 if (upper->attribute) {
1710 printk(KERN_ERR "SELinux: type %s: "
1711 "bounded by attribute %s",
1713 sym_name(p, SYM_TYPES, upper->value - 1));
1721 static int policydb_bounds_sanity_check(struct policydb *p)
1725 if (p->policyvers < POLICYDB_VERSION_BOUNDARY)
1728 rc = hashtab_map(p->p_users.table,
1729 user_bounds_sanity_check, p);
1733 rc = hashtab_map(p->p_roles.table,
1734 role_bounds_sanity_check, p);
1738 rc = hashtab_map(p->p_types.table,
1739 type_bounds_sanity_check, p);
1746 extern int ss_initialized;
1748 u16 string_to_security_class(struct policydb *p, const char *name)
1750 struct class_datum *cladatum;
1752 cladatum = hashtab_search(p->p_classes.table, name);
1756 return cladatum->value;
1759 u32 string_to_av_perm(struct policydb *p, u16 tclass, const char *name)
1761 struct class_datum *cladatum;
1762 struct perm_datum *perdatum = NULL;
1763 struct common_datum *comdatum;
1765 if (!tclass || tclass > p->p_classes.nprim)
1768 cladatum = p->class_val_to_struct[tclass-1];
1769 comdatum = cladatum->comdatum;
1771 perdatum = hashtab_search(comdatum->permissions.table,
1774 perdatum = hashtab_search(cladatum->permissions.table,
1779 return 1U << (perdatum->value-1);
1782 static int range_read(struct policydb *p, void *fp)
1784 struct range_trans *rt = NULL;
1785 struct mls_range *r = NULL;
1790 if (p->policyvers < POLICYDB_VERSION_MLS)
1793 rc = next_entry(buf, fp, sizeof(u32));
1797 nel = le32_to_cpu(buf[0]);
1798 for (i = 0; i < nel; i++) {
1800 rt = kzalloc(sizeof(*rt), GFP_KERNEL);
1804 rc = next_entry(buf, fp, (sizeof(u32) * 2));
1808 rt->source_type = le32_to_cpu(buf[0]);
1809 rt->target_type = le32_to_cpu(buf[1]);
1810 if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) {
1811 rc = next_entry(buf, fp, sizeof(u32));
1814 rt->target_class = le32_to_cpu(buf[0]);
1816 rt->target_class = p->process_class;
1819 if (!policydb_type_isvalid(p, rt->source_type) ||
1820 !policydb_type_isvalid(p, rt->target_type) ||
1821 !policydb_class_isvalid(p, rt->target_class))
1825 r = kzalloc(sizeof(*r), GFP_KERNEL);
1829 rc = mls_read_range_helper(r, fp);
1834 if (!mls_range_isvalid(p, r)) {
1835 printk(KERN_WARNING "SELinux: rangetrans: invalid range\n");
1839 rc = hashtab_insert(p->range_tr, rt, r);
1846 hash_eval(p->range_tr, "rangetr");
1854 static int filename_trans_read(struct policydb *p, void *fp)
1856 struct filename_trans *ft;
1857 struct filename_trans_datum *otype;
1863 if (p->policyvers < POLICYDB_VERSION_FILENAME_TRANS)
1866 rc = next_entry(buf, fp, sizeof(u32));
1869 nel = le32_to_cpu(buf[0]);
1871 for (i = 0; i < nel; i++) {
1877 ft = kzalloc(sizeof(*ft), GFP_KERNEL);
1882 otype = kmalloc(sizeof(*otype), GFP_KERNEL);
1886 /* length of the path component string */
1887 rc = next_entry(buf, fp, sizeof(u32));
1890 len = le32_to_cpu(buf[0]);
1893 name = kmalloc(len + 1, GFP_KERNEL);
1899 /* path component string */
1900 rc = next_entry(name, fp, len);
1905 rc = next_entry(buf, fp, sizeof(u32) * 4);
1909 ft->stype = le32_to_cpu(buf[0]);
1910 ft->ttype = le32_to_cpu(buf[1]);
1911 ft->tclass = le32_to_cpu(buf[2]);
1913 otype->otype = le32_to_cpu(buf[3]);
1915 rc = ebitmap_set_bit(&p->filename_trans_ttypes, ft->ttype, 1);
1919 hashtab_insert(p->filename_trans, ft, otype);
1921 hash_eval(p->filename_trans, "filenametr");
1931 static int genfs_read(struct policydb *p, void *fp)
1934 u32 nel, nel2, len, len2;
1936 struct ocontext *l, *c;
1937 struct ocontext *newc = NULL;
1938 struct genfs *genfs_p, *genfs;
1939 struct genfs *newgenfs = NULL;
1941 rc = next_entry(buf, fp, sizeof(u32));
1944 nel = le32_to_cpu(buf[0]);
1946 for (i = 0; i < nel; i++) {
1947 rc = next_entry(buf, fp, sizeof(u32));
1950 len = le32_to_cpu(buf[0]);
1953 newgenfs = kzalloc(sizeof(*newgenfs), GFP_KERNEL);
1958 newgenfs->fstype = kmalloc(len + 1, GFP_KERNEL);
1959 if (!newgenfs->fstype)
1962 rc = next_entry(newgenfs->fstype, fp, len);
1966 newgenfs->fstype[len] = 0;
1968 for (genfs_p = NULL, genfs = p->genfs; genfs;
1969 genfs_p = genfs, genfs = genfs->next) {
1971 if (strcmp(newgenfs->fstype, genfs->fstype) == 0) {
1972 printk(KERN_ERR "SELinux: dup genfs fstype %s\n",
1976 if (strcmp(newgenfs->fstype, genfs->fstype) < 0)
1979 newgenfs->next = genfs;
1981 genfs_p->next = newgenfs;
1983 p->genfs = newgenfs;
1987 rc = next_entry(buf, fp, sizeof(u32));
1991 nel2 = le32_to_cpu(buf[0]);
1992 for (j = 0; j < nel2; j++) {
1993 rc = next_entry(buf, fp, sizeof(u32));
1996 len = le32_to_cpu(buf[0]);
1999 newc = kzalloc(sizeof(*newc), GFP_KERNEL);
2004 newc->u.name = kmalloc(len + 1, GFP_KERNEL);
2008 rc = next_entry(newc->u.name, fp, len);
2011 newc->u.name[len] = 0;
2013 rc = next_entry(buf, fp, sizeof(u32));
2017 newc->v.sclass = le32_to_cpu(buf[0]);
2018 rc = context_read_and_validate(&newc->context[0], p, fp);
2022 for (l = NULL, c = genfs->head; c;
2023 l = c, c = c->next) {
2025 if (!strcmp(newc->u.name, c->u.name) &&
2026 (!c->v.sclass || !newc->v.sclass ||
2027 newc->v.sclass == c->v.sclass)) {
2028 printk(KERN_ERR "SELinux: dup genfs entry (%s,%s)\n",
2029 genfs->fstype, c->u.name);
2032 len = strlen(newc->u.name);
2033 len2 = strlen(c->u.name);
2049 kfree(newgenfs->fstype);
2051 ocontext_destroy(newc, OCON_FSUSE);
2056 static int ocontext_read(struct policydb *p, struct policydb_compat_info *info,
2062 struct ocontext *l, *c;
2065 for (i = 0; i < info->ocon_num; i++) {
2066 rc = next_entry(buf, fp, sizeof(u32));
2069 nel = le32_to_cpu(buf[0]);
2072 for (j = 0; j < nel; j++) {
2074 c = kzalloc(sizeof(*c), GFP_KERNEL);
2080 p->ocontexts[i] = c;
2085 rc = next_entry(buf, fp, sizeof(u32));
2089 c->sid[0] = le32_to_cpu(buf[0]);
2090 rc = context_read_and_validate(&c->context[0], p, fp);
2096 rc = next_entry(buf, fp, sizeof(u32));
2099 len = le32_to_cpu(buf[0]);
2102 c->u.name = kmalloc(len + 1, GFP_KERNEL);
2106 rc = next_entry(c->u.name, fp, len);
2111 rc = context_read_and_validate(&c->context[0], p, fp);
2114 rc = context_read_and_validate(&c->context[1], p, fp);
2119 rc = next_entry(buf, fp, sizeof(u32)*3);
2122 c->u.port.protocol = le32_to_cpu(buf[0]);
2123 c->u.port.low_port = le32_to_cpu(buf[1]);
2124 c->u.port.high_port = le32_to_cpu(buf[2]);
2125 rc = context_read_and_validate(&c->context[0], p, fp);
2130 rc = next_entry(nodebuf, fp, sizeof(u32) * 2);
2133 c->u.node.addr = nodebuf[0]; /* network order */
2134 c->u.node.mask = nodebuf[1]; /* network order */
2135 rc = context_read_and_validate(&c->context[0], p, fp);
2140 rc = next_entry(buf, fp, sizeof(u32)*2);
2145 c->v.behavior = le32_to_cpu(buf[0]);
2146 if (c->v.behavior > SECURITY_FS_USE_NONE)
2150 len = le32_to_cpu(buf[1]);
2151 c->u.name = kmalloc(len + 1, GFP_KERNEL);
2155 rc = next_entry(c->u.name, fp, len);
2159 rc = context_read_and_validate(&c->context[0], p, fp);
2166 rc = next_entry(nodebuf, fp, sizeof(u32) * 8);
2169 for (k = 0; k < 4; k++)
2170 c->u.node6.addr[k] = nodebuf[k];
2171 for (k = 0; k < 4; k++)
2172 c->u.node6.mask[k] = nodebuf[k+4];
2173 rc = context_read_and_validate(&c->context[0], p, fp);
2187 * Read the configuration data from a policy database binary
2188 * representation file into a policy database structure.
2190 int policydb_read(struct policydb *p, void *fp)
2192 struct role_allow *ra, *lra;
2193 struct role_trans *tr, *ltr;
2196 u32 len, nprim, nel;
2199 struct policydb_compat_info *info;
2201 rc = policydb_init(p);
2205 /* Read the magic number and string length. */
2206 rc = next_entry(buf, fp, sizeof(u32) * 2);
2211 if (le32_to_cpu(buf[0]) != POLICYDB_MAGIC) {
2212 printk(KERN_ERR "SELinux: policydb magic number 0x%x does "
2213 "not match expected magic number 0x%x\n",
2214 le32_to_cpu(buf[0]), POLICYDB_MAGIC);
2219 len = le32_to_cpu(buf[1]);
2220 if (len != strlen(POLICYDB_STRING)) {
2221 printk(KERN_ERR "SELinux: policydb string length %d does not "
2222 "match expected length %Zu\n",
2223 len, strlen(POLICYDB_STRING));
2228 policydb_str = kmalloc(len + 1, GFP_KERNEL);
2229 if (!policydb_str) {
2230 printk(KERN_ERR "SELinux: unable to allocate memory for policydb "
2231 "string of length %d\n", len);
2235 rc = next_entry(policydb_str, fp, len);
2237 printk(KERN_ERR "SELinux: truncated policydb string identifier\n");
2238 kfree(policydb_str);
2243 policydb_str[len] = '\0';
2244 if (strcmp(policydb_str, POLICYDB_STRING)) {
2245 printk(KERN_ERR "SELinux: policydb string %s does not match "
2246 "my string %s\n", policydb_str, POLICYDB_STRING);
2247 kfree(policydb_str);
2250 /* Done with policydb_str. */
2251 kfree(policydb_str);
2252 policydb_str = NULL;
2254 /* Read the version and table sizes. */
2255 rc = next_entry(buf, fp, sizeof(u32)*4);
2260 p->policyvers = le32_to_cpu(buf[0]);
2261 if (p->policyvers < POLICYDB_VERSION_MIN ||
2262 p->policyvers > POLICYDB_VERSION_MAX) {
2263 printk(KERN_ERR "SELinux: policydb version %d does not match "
2264 "my version range %d-%d\n",
2265 le32_to_cpu(buf[0]), POLICYDB_VERSION_MIN, POLICYDB_VERSION_MAX);
2269 if ((le32_to_cpu(buf[1]) & POLICYDB_CONFIG_MLS)) {
2273 if (p->policyvers < POLICYDB_VERSION_MLS) {
2274 printk(KERN_ERR "SELinux: security policydb version %d "
2275 "(MLS) not backwards compatible\n",
2280 p->reject_unknown = !!(le32_to_cpu(buf[1]) & REJECT_UNKNOWN);
2281 p->allow_unknown = !!(le32_to_cpu(buf[1]) & ALLOW_UNKNOWN);
2283 if (p->policyvers >= POLICYDB_VERSION_POLCAP) {
2284 rc = ebitmap_read(&p->policycaps, fp);
2289 if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE) {
2290 rc = ebitmap_read(&p->permissive_map, fp);
2296 info = policydb_lookup_compat(p->policyvers);
2298 printk(KERN_ERR "SELinux: unable to find policy compat info "
2299 "for version %d\n", p->policyvers);
2304 if (le32_to_cpu(buf[2]) != info->sym_num ||
2305 le32_to_cpu(buf[3]) != info->ocon_num) {
2306 printk(KERN_ERR "SELinux: policydb table sizes (%d,%d) do "
2307 "not match mine (%d,%d)\n", le32_to_cpu(buf[2]),
2308 le32_to_cpu(buf[3]),
2309 info->sym_num, info->ocon_num);
2313 for (i = 0; i < info->sym_num; i++) {
2314 rc = next_entry(buf, fp, sizeof(u32)*2);
2317 nprim = le32_to_cpu(buf[0]);
2318 nel = le32_to_cpu(buf[1]);
2319 for (j = 0; j < nel; j++) {
2320 rc = read_f[i](p, p->symtab[i].table, fp);
2325 p->symtab[i].nprim = nprim;
2329 p->process_class = string_to_security_class(p, "process");
2330 if (!p->process_class)
2333 rc = avtab_read(&p->te_avtab, fp, p);
2337 if (p->policyvers >= POLICYDB_VERSION_BOOL) {
2338 rc = cond_read_list(p, fp);
2343 rc = next_entry(buf, fp, sizeof(u32));
2346 nel = le32_to_cpu(buf[0]);
2348 for (i = 0; i < nel; i++) {
2350 tr = kzalloc(sizeof(*tr), GFP_KERNEL);
2357 rc = next_entry(buf, fp, sizeof(u32)*3);
2362 tr->role = le32_to_cpu(buf[0]);
2363 tr->type = le32_to_cpu(buf[1]);
2364 tr->new_role = le32_to_cpu(buf[2]);
2365 if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) {
2366 rc = next_entry(buf, fp, sizeof(u32));
2369 tr->tclass = le32_to_cpu(buf[0]);
2371 tr->tclass = p->process_class;
2373 if (!policydb_role_isvalid(p, tr->role) ||
2374 !policydb_type_isvalid(p, tr->type) ||
2375 !policydb_class_isvalid(p, tr->tclass) ||
2376 !policydb_role_isvalid(p, tr->new_role))
2381 rc = next_entry(buf, fp, sizeof(u32));
2384 nel = le32_to_cpu(buf[0]);
2386 for (i = 0; i < nel; i++) {
2388 ra = kzalloc(sizeof(*ra), GFP_KERNEL);
2395 rc = next_entry(buf, fp, sizeof(u32)*2);
2400 ra->role = le32_to_cpu(buf[0]);
2401 ra->new_role = le32_to_cpu(buf[1]);
2402 if (!policydb_role_isvalid(p, ra->role) ||
2403 !policydb_role_isvalid(p, ra->new_role))
2408 rc = filename_trans_read(p, fp);
2412 rc = policydb_index(p);
2417 p->process_trans_perms = string_to_av_perm(p, p->process_class, "transition");
2418 p->process_trans_perms |= string_to_av_perm(p, p->process_class, "dyntransition");
2419 if (!p->process_trans_perms)
2422 rc = ocontext_read(p, info, fp);
2426 rc = genfs_read(p, fp);
2430 rc = range_read(p, fp);
2435 p->type_attr_map_array = flex_array_alloc(sizeof(struct ebitmap),
2437 GFP_KERNEL | __GFP_ZERO);
2438 if (!p->type_attr_map_array)
2441 /* preallocate so we don't have to worry about the put ever failing */
2442 rc = flex_array_prealloc(p->type_attr_map_array, 0, p->p_types.nprim - 1,
2443 GFP_KERNEL | __GFP_ZERO);
2447 for (i = 0; i < p->p_types.nprim; i++) {
2448 struct ebitmap *e = flex_array_get(p->type_attr_map_array, i);
2452 if (p->policyvers >= POLICYDB_VERSION_AVTAB) {
2453 rc = ebitmap_read(e, fp);
2457 /* add the type itself as the degenerate case */
2458 rc = ebitmap_set_bit(e, i, 1);
2463 rc = policydb_bounds_sanity_check(p);
2471 policydb_destroy(p);
2476 * Write a MLS level structure to a policydb binary
2477 * representation file.
2479 static int mls_write_level(struct mls_level *l, void *fp)
2484 buf[0] = cpu_to_le32(l->sens);
2485 rc = put_entry(buf, sizeof(u32), 1, fp);
2489 rc = ebitmap_write(&l->cat, fp);
2497 * Write a MLS range structure to a policydb binary
2498 * representation file.
2500 static int mls_write_range_helper(struct mls_range *r, void *fp)
2506 eq = mls_level_eq(&r->level[1], &r->level[0]);
2512 buf[0] = cpu_to_le32(items-1);
2513 buf[1] = cpu_to_le32(r->level[0].sens);
2515 buf[2] = cpu_to_le32(r->level[1].sens);
2517 BUG_ON(items > (sizeof(buf)/sizeof(buf[0])));
2519 rc = put_entry(buf, sizeof(u32), items, fp);
2523 rc = ebitmap_write(&r->level[0].cat, fp);
2527 rc = ebitmap_write(&r->level[1].cat, fp);
2535 static int sens_write(void *vkey, void *datum, void *ptr)
2538 struct level_datum *levdatum = datum;
2539 struct policy_data *pd = ptr;
2546 buf[0] = cpu_to_le32(len);
2547 buf[1] = cpu_to_le32(levdatum->isalias);
2548 rc = put_entry(buf, sizeof(u32), 2, fp);
2552 rc = put_entry(key, 1, len, fp);
2556 rc = mls_write_level(levdatum->level, fp);
2563 static int cat_write(void *vkey, void *datum, void *ptr)
2566 struct cat_datum *catdatum = datum;
2567 struct policy_data *pd = ptr;
2574 buf[0] = cpu_to_le32(len);
2575 buf[1] = cpu_to_le32(catdatum->value);
2576 buf[2] = cpu_to_le32(catdatum->isalias);
2577 rc = put_entry(buf, sizeof(u32), 3, fp);
2581 rc = put_entry(key, 1, len, fp);
2588 static int role_trans_write(struct policydb *p, void *fp)
2590 struct role_trans *r = p->role_tr;
2591 struct role_trans *tr;
2597 for (tr = r; tr; tr = tr->next)
2599 buf[0] = cpu_to_le32(nel);
2600 rc = put_entry(buf, sizeof(u32), 1, fp);
2603 for (tr = r; tr; tr = tr->next) {
2604 buf[0] = cpu_to_le32(tr->role);
2605 buf[1] = cpu_to_le32(tr->type);
2606 buf[2] = cpu_to_le32(tr->new_role);
2607 rc = put_entry(buf, sizeof(u32), 3, fp);
2610 if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) {
2611 buf[0] = cpu_to_le32(tr->tclass);
2612 rc = put_entry(buf, sizeof(u32), 1, fp);
2621 static int role_allow_write(struct role_allow *r, void *fp)
2623 struct role_allow *ra;
2629 for (ra = r; ra; ra = ra->next)
2631 buf[0] = cpu_to_le32(nel);
2632 rc = put_entry(buf, sizeof(u32), 1, fp);
2635 for (ra = r; ra; ra = ra->next) {
2636 buf[0] = cpu_to_le32(ra->role);
2637 buf[1] = cpu_to_le32(ra->new_role);
2638 rc = put_entry(buf, sizeof(u32), 2, fp);
2646 * Write a security context structure
2647 * to a policydb binary representation file.
2649 static int context_write(struct policydb *p, struct context *c,
2655 buf[0] = cpu_to_le32(c->user);
2656 buf[1] = cpu_to_le32(c->role);
2657 buf[2] = cpu_to_le32(c->type);
2659 rc = put_entry(buf, sizeof(u32), 3, fp);
2663 rc = mls_write_range_helper(&c->range, fp);
2671 * The following *_write functions are used to
2672 * write the symbol data to a policy database
2673 * binary representation file.
2676 static int perm_write(void *vkey, void *datum, void *fp)
2679 struct perm_datum *perdatum = datum;
2685 buf[0] = cpu_to_le32(len);
2686 buf[1] = cpu_to_le32(perdatum->value);
2687 rc = put_entry(buf, sizeof(u32), 2, fp);
2691 rc = put_entry(key, 1, len, fp);
2698 static int common_write(void *vkey, void *datum, void *ptr)
2701 struct common_datum *comdatum = datum;
2702 struct policy_data *pd = ptr;
2709 buf[0] = cpu_to_le32(len);
2710 buf[1] = cpu_to_le32(comdatum->value);
2711 buf[2] = cpu_to_le32(comdatum->permissions.nprim);
2712 buf[3] = cpu_to_le32(comdatum->permissions.table->nel);
2713 rc = put_entry(buf, sizeof(u32), 4, fp);
2717 rc = put_entry(key, 1, len, fp);
2721 rc = hashtab_map(comdatum->permissions.table, perm_write, fp);
2728 static int write_cons_helper(struct policydb *p, struct constraint_node *node,
2731 struct constraint_node *c;
2732 struct constraint_expr *e;
2737 for (c = node; c; c = c->next) {
2739 for (e = c->expr; e; e = e->next)
2741 buf[0] = cpu_to_le32(c->permissions);
2742 buf[1] = cpu_to_le32(nel);
2743 rc = put_entry(buf, sizeof(u32), 2, fp);
2746 for (e = c->expr; e; e = e->next) {
2747 buf[0] = cpu_to_le32(e->expr_type);
2748 buf[1] = cpu_to_le32(e->attr);
2749 buf[2] = cpu_to_le32(e->op);
2750 rc = put_entry(buf, sizeof(u32), 3, fp);
2754 switch (e->expr_type) {
2756 rc = ebitmap_write(&e->names, fp);
2769 static int class_write(void *vkey, void *datum, void *ptr)
2772 struct class_datum *cladatum = datum;
2773 struct policy_data *pd = ptr;
2775 struct policydb *p = pd->p;
2776 struct constraint_node *c;
2783 if (cladatum->comkey)
2784 len2 = strlen(cladatum->comkey);
2789 for (c = cladatum->constraints; c; c = c->next)
2792 buf[0] = cpu_to_le32(len);
2793 buf[1] = cpu_to_le32(len2);
2794 buf[2] = cpu_to_le32(cladatum->value);
2795 buf[3] = cpu_to_le32(cladatum->permissions.nprim);
2796 if (cladatum->permissions.table)
2797 buf[4] = cpu_to_le32(cladatum->permissions.table->nel);
2800 buf[5] = cpu_to_le32(ncons);
2801 rc = put_entry(buf, sizeof(u32), 6, fp);
2805 rc = put_entry(key, 1, len, fp);
2809 if (cladatum->comkey) {
2810 rc = put_entry(cladatum->comkey, 1, len2, fp);
2815 rc = hashtab_map(cladatum->permissions.table, perm_write, fp);
2819 rc = write_cons_helper(p, cladatum->constraints, fp);
2823 /* write out the validatetrans rule */
2825 for (c = cladatum->validatetrans; c; c = c->next)
2828 buf[0] = cpu_to_le32(ncons);
2829 rc = put_entry(buf, sizeof(u32), 1, fp);
2833 rc = write_cons_helper(p, cladatum->validatetrans, fp);
2840 static int role_write(void *vkey, void *datum, void *ptr)
2843 struct role_datum *role = datum;
2844 struct policy_data *pd = ptr;
2846 struct policydb *p = pd->p;
2853 buf[items++] = cpu_to_le32(len);
2854 buf[items++] = cpu_to_le32(role->value);
2855 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
2856 buf[items++] = cpu_to_le32(role->bounds);
2858 BUG_ON(items > (sizeof(buf)/sizeof(buf[0])));
2860 rc = put_entry(buf, sizeof(u32), items, fp);
2864 rc = put_entry(key, 1, len, fp);
2868 rc = ebitmap_write(&role->dominates, fp);
2872 rc = ebitmap_write(&role->types, fp);
2879 static int type_write(void *vkey, void *datum, void *ptr)
2882 struct type_datum *typdatum = datum;
2883 struct policy_data *pd = ptr;
2884 struct policydb *p = pd->p;
2892 buf[items++] = cpu_to_le32(len);
2893 buf[items++] = cpu_to_le32(typdatum->value);
2894 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) {
2897 if (typdatum->primary)
2898 properties |= TYPEDATUM_PROPERTY_PRIMARY;
2900 if (typdatum->attribute)
2901 properties |= TYPEDATUM_PROPERTY_ATTRIBUTE;
2903 buf[items++] = cpu_to_le32(properties);
2904 buf[items++] = cpu_to_le32(typdatum->bounds);
2906 buf[items++] = cpu_to_le32(typdatum->primary);
2908 BUG_ON(items > (sizeof(buf) / sizeof(buf[0])));
2909 rc = put_entry(buf, sizeof(u32), items, fp);
2913 rc = put_entry(key, 1, len, fp);
2920 static int user_write(void *vkey, void *datum, void *ptr)
2923 struct user_datum *usrdatum = datum;
2924 struct policy_data *pd = ptr;
2925 struct policydb *p = pd->p;
2933 buf[items++] = cpu_to_le32(len);
2934 buf[items++] = cpu_to_le32(usrdatum->value);
2935 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
2936 buf[items++] = cpu_to_le32(usrdatum->bounds);
2937 BUG_ON(items > (sizeof(buf) / sizeof(buf[0])));
2938 rc = put_entry(buf, sizeof(u32), items, fp);
2942 rc = put_entry(key, 1, len, fp);
2946 rc = ebitmap_write(&usrdatum->roles, fp);
2950 rc = mls_write_range_helper(&usrdatum->range, fp);
2954 rc = mls_write_level(&usrdatum->dfltlevel, fp);
2961 static int (*write_f[SYM_NUM]) (void *key, void *datum,
2974 static int ocontext_write(struct policydb *p, struct policydb_compat_info *info,
2977 unsigned int i, j, rc;
2982 for (i = 0; i < info->ocon_num; i++) {
2984 for (c = p->ocontexts[i]; c; c = c->next)
2986 buf[0] = cpu_to_le32(nel);
2987 rc = put_entry(buf, sizeof(u32), 1, fp);
2990 for (c = p->ocontexts[i]; c; c = c->next) {
2993 buf[0] = cpu_to_le32(c->sid[0]);
2994 rc = put_entry(buf, sizeof(u32), 1, fp);
2997 rc = context_write(p, &c->context[0], fp);
3003 len = strlen(c->u.name);
3004 buf[0] = cpu_to_le32(len);
3005 rc = put_entry(buf, sizeof(u32), 1, fp);
3008 rc = put_entry(c->u.name, 1, len, fp);
3011 rc = context_write(p, &c->context[0], fp);
3014 rc = context_write(p, &c->context[1], fp);
3019 buf[0] = cpu_to_le32(c->u.port.protocol);
3020 buf[1] = cpu_to_le32(c->u.port.low_port);
3021 buf[2] = cpu_to_le32(c->u.port.high_port);
3022 rc = put_entry(buf, sizeof(u32), 3, fp);
3025 rc = context_write(p, &c->context[0], fp);
3030 nodebuf[0] = c->u.node.addr; /* network order */
3031 nodebuf[1] = c->u.node.mask; /* network order */
3032 rc = put_entry(nodebuf, sizeof(u32), 2, fp);
3035 rc = context_write(p, &c->context[0], fp);
3040 buf[0] = cpu_to_le32(c->v.behavior);
3041 len = strlen(c->u.name);
3042 buf[1] = cpu_to_le32(len);
3043 rc = put_entry(buf, sizeof(u32), 2, fp);
3046 rc = put_entry(c->u.name, 1, len, fp);
3049 rc = context_write(p, &c->context[0], fp);
3054 for (j = 0; j < 4; j++)
3055 nodebuf[j] = c->u.node6.addr[j]; /* network order */
3056 for (j = 0; j < 4; j++)
3057 nodebuf[j + 4] = c->u.node6.mask[j]; /* network order */
3058 rc = put_entry(nodebuf, sizeof(u32), 8, fp);
3061 rc = context_write(p, &c->context[0], fp);
3071 static int genfs_write(struct policydb *p, void *fp)
3073 struct genfs *genfs;
3080 for (genfs = p->genfs; genfs; genfs = genfs->next)
3082 buf[0] = cpu_to_le32(len);
3083 rc = put_entry(buf, sizeof(u32), 1, fp);
3086 for (genfs = p->genfs; genfs; genfs = genfs->next) {
3087 len = strlen(genfs->fstype);
3088 buf[0] = cpu_to_le32(len);
3089 rc = put_entry(buf, sizeof(u32), 1, fp);
3092 rc = put_entry(genfs->fstype, 1, len, fp);
3096 for (c = genfs->head; c; c = c->next)
3098 buf[0] = cpu_to_le32(len);
3099 rc = put_entry(buf, sizeof(u32), 1, fp);
3102 for (c = genfs->head; c; c = c->next) {
3103 len = strlen(c->u.name);
3104 buf[0] = cpu_to_le32(len);
3105 rc = put_entry(buf, sizeof(u32), 1, fp);
3108 rc = put_entry(c->u.name, 1, len, fp);
3111 buf[0] = cpu_to_le32(c->v.sclass);
3112 rc = put_entry(buf, sizeof(u32), 1, fp);
3115 rc = context_write(p, &c->context[0], fp);
3123 static int hashtab_cnt(void *key, void *data, void *ptr)
3131 static int range_write_helper(void *key, void *data, void *ptr)
3134 struct range_trans *rt = key;
3135 struct mls_range *r = data;
3136 struct policy_data *pd = ptr;
3138 struct policydb *p = pd->p;
3141 buf[0] = cpu_to_le32(rt->source_type);
3142 buf[1] = cpu_to_le32(rt->target_type);
3143 rc = put_entry(buf, sizeof(u32), 2, fp);
3146 if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) {
3147 buf[0] = cpu_to_le32(rt->target_class);
3148 rc = put_entry(buf, sizeof(u32), 1, fp);
3152 rc = mls_write_range_helper(r, fp);
3159 static int range_write(struct policydb *p, void *fp)
3164 struct policy_data pd;
3169 /* count the number of entries in the hashtab */
3171 rc = hashtab_map(p->range_tr, hashtab_cnt, &nel);
3175 buf[0] = cpu_to_le32(nel);
3176 rc = put_entry(buf, sizeof(u32), 1, fp);
3180 /* actually write all of the entries */
3181 rc = hashtab_map(p->range_tr, range_write_helper, &pd);
3188 static int filename_write_helper(void *key, void *data, void *ptr)
3191 struct filename_trans *ft = key;
3192 struct filename_trans_datum *otype = data;
3197 len = strlen(ft->name);
3198 buf[0] = cpu_to_le32(len);
3199 rc = put_entry(buf, sizeof(u32), 1, fp);
3203 rc = put_entry(ft->name, sizeof(char), len, fp);
3209 buf[2] = ft->tclass;
3210 buf[3] = otype->otype;
3212 rc = put_entry(buf, sizeof(u32), 4, fp);
3219 static int filename_trans_write(struct policydb *p, void *fp)
3226 rc = hashtab_map(p->filename_trans, hashtab_cnt, &nel);
3230 buf[0] = cpu_to_le32(nel);
3231 rc = put_entry(buf, sizeof(u32), 1, fp);
3235 rc = hashtab_map(p->filename_trans, filename_write_helper, fp);
3243 * Write the configuration data in a policy database
3244 * structure to a policy database binary representation
3247 int policydb_write(struct policydb *p, void *fp)
3249 unsigned int i, num_syms;
3254 struct policydb_compat_info *info;
3257 * refuse to write policy older than compressed avtab
3258 * to simplify the writer. There are other tests dropped
3259 * since we assume this throughout the writer code. Be
3260 * careful if you ever try to remove this restriction
3262 if (p->policyvers < POLICYDB_VERSION_AVTAB) {
3263 printk(KERN_ERR "SELinux: refusing to write policy version %d."
3264 " Because it is less than version %d\n", p->policyvers,
3265 POLICYDB_VERSION_AVTAB);
3271 config |= POLICYDB_CONFIG_MLS;
3273 if (p->reject_unknown)
3274 config |= REJECT_UNKNOWN;
3275 if (p->allow_unknown)
3276 config |= ALLOW_UNKNOWN;
3278 /* Write the magic number and string identifiers. */
3279 buf[0] = cpu_to_le32(POLICYDB_MAGIC);
3280 len = strlen(POLICYDB_STRING);
3281 buf[1] = cpu_to_le32(len);
3282 rc = put_entry(buf, sizeof(u32), 2, fp);
3285 rc = put_entry(POLICYDB_STRING, 1, len, fp);
3289 /* Write the version, config, and table sizes. */
3290 info = policydb_lookup_compat(p->policyvers);
3292 printk(KERN_ERR "SELinux: compatibility lookup failed for policy "
3293 "version %d", p->policyvers);
3297 buf[0] = cpu_to_le32(p->policyvers);
3298 buf[1] = cpu_to_le32(config);
3299 buf[2] = cpu_to_le32(info->sym_num);
3300 buf[3] = cpu_to_le32(info->ocon_num);
3302 rc = put_entry(buf, sizeof(u32), 4, fp);
3306 if (p->policyvers >= POLICYDB_VERSION_POLCAP) {
3307 rc = ebitmap_write(&p->policycaps, fp);
3312 if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE) {
3313 rc = ebitmap_write(&p->permissive_map, fp);
3318 num_syms = info->sym_num;
3319 for (i = 0; i < num_syms; i++) {
3320 struct policy_data pd;
3325 buf[0] = cpu_to_le32(p->symtab[i].nprim);
3326 buf[1] = cpu_to_le32(p->symtab[i].table->nel);
3328 rc = put_entry(buf, sizeof(u32), 2, fp);
3331 rc = hashtab_map(p->symtab[i].table, write_f[i], &pd);
3336 rc = avtab_write(p, &p->te_avtab, fp);
3340 rc = cond_write_list(p, p->cond_list, fp);
3344 rc = role_trans_write(p, fp);
3348 rc = role_allow_write(p->role_allow, fp);
3352 rc = filename_trans_write(p, fp);
3356 rc = ocontext_write(p, info, fp);
3360 rc = genfs_write(p, fp);
3364 rc = range_write(p, fp);
3368 for (i = 0; i < p->p_types.nprim; i++) {
3369 struct ebitmap *e = flex_array_get(p->type_attr_map_array, i);
3372 rc = ebitmap_write(e, fp);