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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /security/selinux/ss/policydb.c
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'security/selinux/ss/policydb.c')
-rw-r--r--security/selinux/ss/policydb.c1843
1 files changed, 1843 insertions, 0 deletions
diff --git a/security/selinux/ss/policydb.c b/security/selinux/ss/policydb.c
new file mode 100644
index 00000000000..14190efbf33
--- /dev/null
+++ b/security/selinux/ss/policydb.c
@@ -0,0 +1,1843 @@
+/*
+ * Implementation of the policy database.
+ *
+ * Author : Stephen Smalley, <sds@epoch.ncsc.mil>
+ */
+
+/*
+ * Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com>
+ *
+ * Support for enhanced MLS infrastructure.
+ *
+ * Updated: Frank Mayer <mayerf@tresys.com> and Karl MacMillan <kmacmillan@tresys.com>
+ *
+ * Added conditional policy language extensions
+ *
+ * Copyright (C) 2004-2005 Trusted Computer Solutions, Inc.
+ * Copyright (C) 2003 - 2004 Tresys Technology, LLC
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 2.
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include "security.h"
+
+#include "policydb.h"
+#include "conditional.h"
+#include "mls.h"
+
+#define _DEBUG_HASHES
+
+#ifdef DEBUG_HASHES
+static char *symtab_name[SYM_NUM] = {
+ "common prefixes",
+ "classes",
+ "roles",
+ "types",
+ "users",
+ "bools",
+ "levels",
+ "categories",
+};
+#endif
+
+int selinux_mls_enabled = 0;
+
+static unsigned int symtab_sizes[SYM_NUM] = {
+ 2,
+ 32,
+ 16,
+ 512,
+ 128,
+ 16,
+ 16,
+ 16,
+};
+
+struct policydb_compat_info {
+ int version;
+ int sym_num;
+ int ocon_num;
+};
+
+/* These need to be updated if SYM_NUM or OCON_NUM changes */
+static struct policydb_compat_info policydb_compat[] = {
+ {
+ .version = POLICYDB_VERSION_BASE,
+ .sym_num = SYM_NUM - 3,
+ .ocon_num = OCON_NUM - 1,
+ },
+ {
+ .version = POLICYDB_VERSION_BOOL,
+ .sym_num = SYM_NUM - 2,
+ .ocon_num = OCON_NUM - 1,
+ },
+ {
+ .version = POLICYDB_VERSION_IPV6,
+ .sym_num = SYM_NUM - 2,
+ .ocon_num = OCON_NUM,
+ },
+ {
+ .version = POLICYDB_VERSION_NLCLASS,
+ .sym_num = SYM_NUM - 2,
+ .ocon_num = OCON_NUM,
+ },
+ {
+ .version = POLICYDB_VERSION_MLS,
+ .sym_num = SYM_NUM,
+ .ocon_num = OCON_NUM,
+ },
+};
+
+static struct policydb_compat_info *policydb_lookup_compat(int version)
+{
+ int i;
+ struct policydb_compat_info *info = NULL;
+
+ for (i = 0; i < sizeof(policydb_compat)/sizeof(*info); i++) {
+ if (policydb_compat[i].version == version) {
+ info = &policydb_compat[i];
+ break;
+ }
+ }
+ return info;
+}
+
+/*
+ * Initialize the role table.
+ */
+static int roles_init(struct policydb *p)
+{
+ char *key = NULL;
+ int rc;
+ struct role_datum *role;
+
+ role = kmalloc(sizeof(*role), GFP_KERNEL);
+ if (!role) {
+ rc = -ENOMEM;
+ goto out;
+ }
+ memset(role, 0, sizeof(*role));
+ role->value = ++p->p_roles.nprim;
+ if (role->value != OBJECT_R_VAL) {
+ rc = -EINVAL;
+ goto out_free_role;
+ }
+ key = kmalloc(strlen(OBJECT_R)+1,GFP_KERNEL);
+ if (!key) {
+ rc = -ENOMEM;
+ goto out_free_role;
+ }
+ strcpy(key, OBJECT_R);
+ rc = hashtab_insert(p->p_roles.table, key, role);
+ if (rc)
+ goto out_free_key;
+out:
+ return rc;
+
+out_free_key:
+ kfree(key);
+out_free_role:
+ kfree(role);
+ goto out;
+}
+
+/*
+ * Initialize a policy database structure.
+ */
+static int policydb_init(struct policydb *p)
+{
+ int i, rc;
+
+ memset(p, 0, sizeof(*p));
+
+ for (i = 0; i < SYM_NUM; i++) {
+ rc = symtab_init(&p->symtab[i], symtab_sizes[i]);
+ if (rc)
+ goto out_free_symtab;
+ }
+
+ rc = avtab_init(&p->te_avtab);
+ if (rc)
+ goto out_free_symtab;
+
+ rc = roles_init(p);
+ if (rc)
+ goto out_free_avtab;
+
+ rc = cond_policydb_init(p);
+ if (rc)
+ goto out_free_avtab;
+
+out:
+ return rc;
+
+out_free_avtab:
+ avtab_destroy(&p->te_avtab);
+
+out_free_symtab:
+ for (i = 0; i < SYM_NUM; i++)
+ hashtab_destroy(p->symtab[i].table);
+ goto out;
+}
+
+/*
+ * The following *_index functions are used to
+ * define the val_to_name and val_to_struct arrays
+ * in a policy database structure. The val_to_name
+ * arrays are used when converting security context
+ * structures into string representations. The
+ * val_to_struct arrays are used when the attributes
+ * of a class, role, or user are needed.
+ */
+
+static int common_index(void *key, void *datum, void *datap)
+{
+ struct policydb *p;
+ struct common_datum *comdatum;
+
+ comdatum = datum;
+ p = datap;
+ if (!comdatum->value || comdatum->value > p->p_commons.nprim)
+ return -EINVAL;
+ p->p_common_val_to_name[comdatum->value - 1] = key;
+ return 0;
+}
+
+static int class_index(void *key, void *datum, void *datap)
+{
+ struct policydb *p;
+ struct class_datum *cladatum;
+
+ cladatum = datum;
+ p = datap;
+ if (!cladatum->value || cladatum->value > p->p_classes.nprim)
+ return -EINVAL;
+ p->p_class_val_to_name[cladatum->value - 1] = key;
+ p->class_val_to_struct[cladatum->value - 1] = cladatum;
+ return 0;
+}
+
+static int role_index(void *key, void *datum, void *datap)
+{
+ struct policydb *p;
+ struct role_datum *role;
+
+ role = datum;
+ p = datap;
+ if (!role->value || role->value > p->p_roles.nprim)
+ return -EINVAL;
+ p->p_role_val_to_name[role->value - 1] = key;
+ p->role_val_to_struct[role->value - 1] = role;
+ return 0;
+}
+
+static int type_index(void *key, void *datum, void *datap)
+{
+ struct policydb *p;
+ struct type_datum *typdatum;
+
+ typdatum = datum;
+ p = datap;
+
+ if (typdatum->primary) {
+ if (!typdatum->value || typdatum->value > p->p_types.nprim)
+ return -EINVAL;
+ p->p_type_val_to_name[typdatum->value - 1] = key;
+ }
+
+ return 0;
+}
+
+static int user_index(void *key, void *datum, void *datap)
+{
+ struct policydb *p;
+ struct user_datum *usrdatum;
+
+ usrdatum = datum;
+ p = datap;
+ if (!usrdatum->value || usrdatum->value > p->p_users.nprim)
+ return -EINVAL;
+ p->p_user_val_to_name[usrdatum->value - 1] = key;
+ p->user_val_to_struct[usrdatum->value - 1] = usrdatum;
+ return 0;
+}
+
+static int sens_index(void *key, void *datum, void *datap)
+{
+ struct policydb *p;
+ struct level_datum *levdatum;
+
+ levdatum = datum;
+ p = datap;
+
+ if (!levdatum->isalias) {
+ if (!levdatum->level->sens ||
+ levdatum->level->sens > p->p_levels.nprim)
+ return -EINVAL;
+ p->p_sens_val_to_name[levdatum->level->sens - 1] = key;
+ }
+
+ return 0;
+}
+
+static int cat_index(void *key, void *datum, void *datap)
+{
+ struct policydb *p;
+ struct cat_datum *catdatum;
+
+ catdatum = datum;
+ p = datap;
+
+ if (!catdatum->isalias) {
+ if (!catdatum->value || catdatum->value > p->p_cats.nprim)
+ return -EINVAL;
+ p->p_cat_val_to_name[catdatum->value - 1] = key;
+ }
+
+ return 0;
+}
+
+static int (*index_f[SYM_NUM]) (void *key, void *datum, void *datap) =
+{
+ common_index,
+ class_index,
+ role_index,
+ type_index,
+ user_index,
+ cond_index_bool,
+ sens_index,
+ cat_index,
+};
+
+/*
+ * Define the common val_to_name array and the class
+ * val_to_name and val_to_struct arrays in a policy
+ * database structure.
+ *
+ * Caller must clean up upon failure.
+ */
+static int policydb_index_classes(struct policydb *p)
+{
+ int rc;
+
+ p->p_common_val_to_name =
+ kmalloc(p->p_commons.nprim * sizeof(char *), GFP_KERNEL);
+ if (!p->p_common_val_to_name) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ rc = hashtab_map(p->p_commons.table, common_index, p);
+ if (rc)
+ goto out;
+
+ p->class_val_to_struct =
+ kmalloc(p->p_classes.nprim * sizeof(*(p->class_val_to_struct)), GFP_KERNEL);
+ if (!p->class_val_to_struct) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ p->p_class_val_to_name =
+ kmalloc(p->p_classes.nprim * sizeof(char *), GFP_KERNEL);
+ if (!p->p_class_val_to_name) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ rc = hashtab_map(p->p_classes.table, class_index, p);
+out:
+ return rc;
+}
+
+#ifdef DEBUG_HASHES
+static void symtab_hash_eval(struct symtab *s)
+{
+ int i;
+
+ for (i = 0; i < SYM_NUM; i++) {
+ struct hashtab *h = s[i].table;
+ struct hashtab_info info;
+
+ hashtab_stat(h, &info);
+ printk(KERN_INFO "%s: %d entries and %d/%d buckets used, "
+ "longest chain length %d\n", symtab_name[i], h->nel,
+ info.slots_used, h->size, info.max_chain_len);
+ }
+}
+#endif
+
+/*
+ * Define the other val_to_name and val_to_struct arrays
+ * in a policy database structure.
+ *
+ * Caller must clean up on failure.
+ */
+static int policydb_index_others(struct policydb *p)
+{
+ int i, rc = 0;
+
+ printk(KERN_INFO "security: %d users, %d roles, %d types, %d bools",
+ p->p_users.nprim, p->p_roles.nprim, p->p_types.nprim, p->p_bools.nprim);
+ if (selinux_mls_enabled)
+ printk(", %d sens, %d cats", p->p_levels.nprim,
+ p->p_cats.nprim);
+ printk("\n");
+
+ printk(KERN_INFO "security: %d classes, %d rules\n",
+ p->p_classes.nprim, p->te_avtab.nel);
+
+#ifdef DEBUG_HASHES
+ avtab_hash_eval(&p->te_avtab, "rules");
+ symtab_hash_eval(p->symtab);
+#endif
+
+ p->role_val_to_struct =
+ kmalloc(p->p_roles.nprim * sizeof(*(p->role_val_to_struct)),
+ GFP_KERNEL);
+ if (!p->role_val_to_struct) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ p->user_val_to_struct =
+ kmalloc(p->p_users.nprim * sizeof(*(p->user_val_to_struct)),
+ GFP_KERNEL);
+ if (!p->user_val_to_struct) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ if (cond_init_bool_indexes(p)) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ for (i = SYM_ROLES; i < SYM_NUM; i++) {
+ p->sym_val_to_name[i] =
+ kmalloc(p->symtab[i].nprim * sizeof(char *), GFP_KERNEL);
+ if (!p->sym_val_to_name[i]) {
+ rc = -ENOMEM;
+ goto out;
+ }
+ rc = hashtab_map(p->symtab[i].table, index_f[i], p);
+ if (rc)
+ goto out;
+ }
+
+out:
+ return rc;
+}
+
+/*
+ * The following *_destroy functions are used to
+ * free any memory allocated for each kind of
+ * symbol data in the policy database.
+ */
+
+static int perm_destroy(void *key, void *datum, void *p)
+{
+ kfree(key);
+ kfree(datum);
+ return 0;
+}
+
+static int common_destroy(void *key, void *datum, void *p)
+{
+ struct common_datum *comdatum;
+
+ kfree(key);
+ comdatum = datum;
+ hashtab_map(comdatum->permissions.table, perm_destroy, NULL);
+ hashtab_destroy(comdatum->permissions.table);
+ kfree(datum);
+ return 0;
+}
+
+static int class_destroy(void *key, void *datum, void *p)
+{
+ struct class_datum *cladatum;
+ struct constraint_node *constraint, *ctemp;
+ struct constraint_expr *e, *etmp;
+
+ kfree(key);
+ cladatum = datum;
+ hashtab_map(cladatum->permissions.table, perm_destroy, NULL);
+ hashtab_destroy(cladatum->permissions.table);
+ constraint = cladatum->constraints;
+ while (constraint) {
+ e = constraint->expr;
+ while (e) {
+ ebitmap_destroy(&e->names);
+ etmp = e;
+ e = e->next;
+ kfree(etmp);
+ }
+ ctemp = constraint;
+ constraint = constraint->next;
+ kfree(ctemp);
+ }
+
+ constraint = cladatum->validatetrans;
+ while (constraint) {
+ e = constraint->expr;
+ while (e) {
+ ebitmap_destroy(&e->names);
+ etmp = e;
+ e = e->next;
+ kfree(etmp);
+ }
+ ctemp = constraint;
+ constraint = constraint->next;
+ kfree(ctemp);
+ }
+
+ kfree(cladatum->comkey);
+ kfree(datum);
+ return 0;
+}
+
+static int role_destroy(void *key, void *datum, void *p)
+{
+ struct role_datum *role;
+
+ kfree(key);
+ role = datum;
+ ebitmap_destroy(&role->dominates);
+ ebitmap_destroy(&role->types);
+ kfree(datum);
+ return 0;
+}
+
+static int type_destroy(void *key, void *datum, void *p)
+{
+ kfree(key);
+ kfree(datum);
+ return 0;
+}
+
+static int user_destroy(void *key, void *datum, void *p)
+{
+ struct user_datum *usrdatum;
+
+ kfree(key);
+ usrdatum = datum;
+ ebitmap_destroy(&usrdatum->roles);
+ ebitmap_destroy(&usrdatum->range.level[0].cat);
+ ebitmap_destroy(&usrdatum->range.level[1].cat);
+ ebitmap_destroy(&usrdatum->dfltlevel.cat);
+ kfree(datum);
+ return 0;
+}
+
+static int sens_destroy(void *key, void *datum, void *p)
+{
+ struct level_datum *levdatum;
+
+ kfree(key);
+ levdatum = datum;
+ ebitmap_destroy(&levdatum->level->cat);
+ kfree(levdatum->level);
+ kfree(datum);
+ return 0;
+}
+
+static int cat_destroy(void *key, void *datum, void *p)
+{
+ kfree(key);
+ kfree(datum);
+ return 0;
+}
+
+static int (*destroy_f[SYM_NUM]) (void *key, void *datum, void *datap) =
+{
+ common_destroy,
+ class_destroy,
+ role_destroy,
+ type_destroy,
+ user_destroy,
+ cond_destroy_bool,
+ sens_destroy,
+ cat_destroy,
+};
+
+static void ocontext_destroy(struct ocontext *c, int i)
+{
+ context_destroy(&c->context[0]);
+ context_destroy(&c->context[1]);
+ if (i == OCON_ISID || i == OCON_FS ||
+ i == OCON_NETIF || i == OCON_FSUSE)
+ kfree(c->u.name);
+ kfree(c);
+}
+
+/*
+ * Free any memory allocated by a policy database structure.
+ */
+void policydb_destroy(struct policydb *p)
+{
+ struct ocontext *c, *ctmp;
+ struct genfs *g, *gtmp;
+ int i;
+
+ for (i = 0; i < SYM_NUM; i++) {
+ hashtab_map(p->symtab[i].table, destroy_f[i], NULL);
+ hashtab_destroy(p->symtab[i].table);
+ }
+
+ for (i = 0; i < SYM_NUM; i++) {
+ if (p->sym_val_to_name[i])
+ kfree(p->sym_val_to_name[i]);
+ }
+
+ if (p->class_val_to_struct)
+ kfree(p->class_val_to_struct);
+ if (p->role_val_to_struct)
+ kfree(p->role_val_to_struct);
+ if (p->user_val_to_struct)
+ kfree(p->user_val_to_struct);
+
+ avtab_destroy(&p->te_avtab);
+
+ for (i = 0; i < OCON_NUM; i++) {
+ c = p->ocontexts[i];
+ while (c) {
+ ctmp = c;
+ c = c->next;
+ ocontext_destroy(ctmp,i);
+ }
+ }
+
+ g = p->genfs;
+ while (g) {
+ kfree(g->fstype);
+ c = g->head;
+ while (c) {
+ ctmp = c;
+ c = c->next;
+ ocontext_destroy(ctmp,OCON_FSUSE);
+ }
+ gtmp = g;
+ g = g->next;
+ kfree(gtmp);
+ }
+
+ cond_policydb_destroy(p);
+
+ return;
+}
+
+/*
+ * Load the initial SIDs specified in a policy database
+ * structure into a SID table.
+ */
+int policydb_load_isids(struct policydb *p, struct sidtab *s)
+{
+ struct ocontext *head, *c;
+ int rc;
+
+ rc = sidtab_init(s);
+ if (rc) {
+ printk(KERN_ERR "security: out of memory on SID table init\n");
+ goto out;
+ }
+
+ head = p->ocontexts[OCON_ISID];
+ for (c = head; c; c = c->next) {
+ if (!c->context[0].user) {
+ printk(KERN_ERR "security: SID %s was never "
+ "defined.\n", c->u.name);
+ rc = -EINVAL;
+ goto out;
+ }
+ if (sidtab_insert(s, c->sid[0], &c->context[0])) {
+ printk(KERN_ERR "security: unable to load initial "
+ "SID %s.\n", c->u.name);
+ rc = -EINVAL;
+ goto out;
+ }
+ }
+out:
+ return rc;
+}
+
+/*
+ * Return 1 if the fields in the security context
+ * structure `c' are valid. Return 0 otherwise.
+ */
+int policydb_context_isvalid(struct policydb *p, struct context *c)
+{
+ struct role_datum *role;
+ struct user_datum *usrdatum;
+
+ if (!c->role || c->role > p->p_roles.nprim)
+ return 0;
+
+ if (!c->user || c->user > p->p_users.nprim)
+ return 0;
+
+ if (!c->type || c->type > p->p_types.nprim)
+ return 0;
+
+ if (c->role != OBJECT_R_VAL) {
+ /*
+ * Role must be authorized for the type.
+ */
+ role = p->role_val_to_struct[c->role - 1];
+ if (!ebitmap_get_bit(&role->types,
+ c->type - 1))
+ /* role may not be associated with type */
+ return 0;
+
+ /*
+ * User must be authorized for the role.
+ */
+ usrdatum = p->user_val_to_struct[c->user - 1];
+ if (!usrdatum)
+ return 0;
+
+ if (!ebitmap_get_bit(&usrdatum->roles,
+ c->role - 1))
+ /* user may not be associated with role */
+ return 0;
+ }
+
+ if (!mls_context_isvalid(p, c))
+ return 0;
+
+ return 1;
+}
+
+/*
+ * Read a MLS range structure from a policydb binary
+ * representation file.
+ */
+static int mls_read_range_helper(struct mls_range *r, void *fp)
+{
+ u32 buf[2], items;
+ int rc;
+
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc < 0)
+ goto out;
+
+ items = le32_to_cpu(buf[0]);
+ if (items > ARRAY_SIZE(buf)) {
+ printk(KERN_ERR "security: mls: range overflow\n");
+ rc = -EINVAL;
+ goto out;
+ }
+ rc = next_entry(buf, fp, sizeof(u32) * items);
+ if (rc < 0) {
+ printk(KERN_ERR "security: mls: truncated range\n");
+ goto out;
+ }
+ r->level[0].sens = le32_to_cpu(buf[0]);
+ if (items > 1)
+ r->level[1].sens = le32_to_cpu(buf[1]);
+ else
+ r->level[1].sens = r->level[0].sens;
+
+ rc = ebitmap_read(&r->level[0].cat, fp);
+ if (rc) {
+ printk(KERN_ERR "security: mls: error reading low "
+ "categories\n");
+ goto out;
+ }
+ if (items > 1) {
+ rc = ebitmap_read(&r->level[1].cat, fp);
+ if (rc) {
+ printk(KERN_ERR "security: mls: error reading high "
+ "categories\n");
+ goto bad_high;
+ }
+ } else {
+ rc = ebitmap_cpy(&r->level[1].cat, &r->level[0].cat);
+ if (rc) {
+ printk(KERN_ERR "security: mls: out of memory\n");
+ goto bad_high;
+ }
+ }
+
+ rc = 0;
+out:
+ return rc;
+bad_high:
+ ebitmap_destroy(&r->level[0].cat);
+ goto out;
+}
+
+/*
+ * Read and validate a security context structure
+ * from a policydb binary representation file.
+ */
+static int context_read_and_validate(struct context *c,
+ struct policydb *p,
+ void *fp)
+{
+ u32 buf[3];
+ int rc;
+
+ rc = next_entry(buf, fp, sizeof buf);
+ if (rc < 0) {
+ printk(KERN_ERR "security: context truncated\n");
+ goto out;
+ }
+ c->user = le32_to_cpu(buf[0]);
+ c->role = le32_to_cpu(buf[1]);
+ c->type = le32_to_cpu(buf[2]);
+ if (p->policyvers >= POLICYDB_VERSION_MLS) {
+ if (mls_read_range_helper(&c->range, fp)) {
+ printk(KERN_ERR "security: error reading MLS range of "
+ "context\n");
+ rc = -EINVAL;
+ goto out;
+ }
+ }
+
+ if (!policydb_context_isvalid(p, c)) {
+ printk(KERN_ERR "security: invalid security context\n");
+ context_destroy(c);
+ rc = -EINVAL;
+ }
+out:
+ return rc;
+}
+
+/*
+ * The following *_read functions are used to
+ * read the symbol data from a policy database
+ * binary representation file.
+ */
+
+static int perm_read(struct policydb *p, struct hashtab *h, void *fp)
+{
+ char *key = NULL;
+ struct perm_datum *perdatum;
+ int rc;
+ u32 buf[2], len;
+
+ perdatum = kmalloc(sizeof(*perdatum), GFP_KERNEL);
+ if (!perdatum) {
+ rc = -ENOMEM;
+ goto out;
+ }
+ memset(perdatum, 0, sizeof(*perdatum));
+
+ rc = next_entry(buf, fp, sizeof buf);
+ if (rc < 0)
+ goto bad;
+
+ len = le32_to_cpu(buf[0]);
+ perdatum->value = le32_to_cpu(buf[1]);
+
+ key = kmalloc(len + 1,GFP_KERNEL);
+ if (!key) {
+ rc = -ENOMEM;
+ goto bad;
+ }
+ rc = next_entry(key, fp, len);
+ if (rc < 0)
+ goto bad;
+ key[len] = 0;
+
+ rc = hashtab_insert(h, key, perdatum);
+ if (rc)
+ goto bad;
+out:
+ return rc;
+bad:
+ perm_destroy(key, perdatum, NULL);
+ goto out;
+}
+
+static int common_read(struct policydb *p, struct hashtab *h, void *fp)
+{
+ char *key = NULL;
+ struct common_datum *comdatum;
+ u32 buf[4], len, nel;
+ int i, rc;
+
+ comdatum = kmalloc(sizeof(*comdatum), GFP_KERNEL);
+ if (!comdatum) {
+ rc = -ENOMEM;
+ goto out;
+ }
+ memset(comdatum, 0, sizeof(*comdatum));
+
+ rc = next_entry(buf, fp, sizeof buf);
+ if (rc < 0)
+ goto bad;
+
+ len = le32_to_cpu(buf[0]);
+ comdatum->value = le32_to_cpu(buf[1]);
+
+ rc = symtab_init(&comdatum->permissions, PERM_SYMTAB_SIZE);
+ if (rc)
+ goto bad;
+ comdatum->permissions.nprim = le32_to_cpu(buf[2]);
+ nel = le32_to_cpu(buf[3]);
+
+ key = kmalloc(len + 1,GFP_KERNEL);
+ if (!key) {
+ rc = -ENOMEM;
+ goto bad;
+ }
+ rc = next_entry(key, fp, len);
+ if (rc < 0)
+ goto bad;
+ key[len] = 0;
+
+ for (i = 0; i < nel; i++) {
+ rc = perm_read(p, comdatum->permissions.table, fp);
+ if (rc)
+ goto bad;
+ }
+
+ rc = hashtab_insert(h, key, comdatum);
+ if (rc)
+ goto bad;
+out:
+ return rc;
+bad:
+ common_destroy(key, comdatum, NULL);
+ goto out;
+}
+
+static int read_cons_helper(struct constraint_node **nodep, int ncons,
+ int allowxtarget, void *fp)
+{
+ struct constraint_node *c, *lc;
+ struct constraint_expr *e, *le;
+ u32 buf[3], nexpr;
+ int rc, i, j, depth;
+
+ lc = NULL;
+ for (i = 0; i < ncons; i++) {
+ c = kmalloc(sizeof(*c), GFP_KERNEL);
+ if (!c)
+ return -ENOMEM;
+ memset(c, 0, sizeof(*c));
+
+ if (lc) {
+ lc->next = c;
+ } else {
+ *nodep = c;
+ }
+
+ rc = next_entry(buf, fp, (sizeof(u32) * 2));
+ if (rc < 0)
+ return rc;
+ c->permissions = le32_to_cpu(buf[0]);
+ nexpr = le32_to_cpu(buf[1]);
+ le = NULL;
+ depth = -1;
+ for (j = 0; j < nexpr; j++) {
+ e = kmalloc(sizeof(*e), GFP_KERNEL);
+ if (!e)
+ return -ENOMEM;
+ memset(e, 0, sizeof(*e));
+
+ if (le) {
+ le->next = e;
+ } else {
+ c->expr = e;
+ }
+
+ rc = next_entry(buf, fp, (sizeof(u32) * 3));
+ if (rc < 0)
+ return rc;
+ e->expr_type = le32_to_cpu(buf[0]);
+ e->attr = le32_to_cpu(buf[1]);
+ e->op = le32_to_cpu(buf[2]);
+
+ switch (e->expr_type) {
+ case CEXPR_NOT:
+ if (depth < 0)
+ return -EINVAL;
+ break;
+ case CEXPR_AND:
+ case CEXPR_OR:
+ if (depth < 1)
+ return -EINVAL;
+ depth--;
+ break;
+ case CEXPR_ATTR:
+ if (depth == (CEXPR_MAXDEPTH - 1))
+ return -EINVAL;
+ depth++;
+ break;
+ case CEXPR_NAMES:
+ if (!allowxtarget && (e->attr & CEXPR_XTARGET))
+ return -EINVAL;
+ if (depth == (CEXPR_MAXDEPTH - 1))
+ return -EINVAL;
+ depth++;
+ if (ebitmap_read(&e->names, fp))
+ return -EINVAL;
+ break;
+ default:
+ return -EINVAL;
+ }
+ le = e;
+ }
+ if (depth != 0)
+ return -EINVAL;
+ lc = c;
+ }
+
+ return 0;
+}
+
+static int class_read(struct policydb *p, struct hashtab *h, void *fp)
+{
+ char *key = NULL;
+ struct class_datum *cladatum;
+ u32 buf[6], len, len2, ncons, nel;
+ int i, rc;
+
+ cladatum = kmalloc(sizeof(*cladatum), GFP_KERNEL);
+ if (!cladatum) {
+ rc = -ENOMEM;
+ goto out;
+ }
+ memset(cladatum, 0, sizeof(*cladatum));
+
+ rc = next_entry(buf, fp, sizeof(u32)*6);
+ if (rc < 0)
+ goto bad;
+
+ len = le32_to_cpu(buf[0]);
+ len2 = le32_to_cpu(buf[1]);
+ cladatum->value = le32_to_cpu(buf[2]);
+
+ rc = symtab_init(&cladatum->permissions, PERM_SYMTAB_SIZE);
+ if (rc)
+ goto bad;
+ cladatum->permissions.nprim = le32_to_cpu(buf[3]);
+ nel = le32_to_cpu(buf[4]);
+
+ ncons = le32_to_cpu(buf[5]);
+
+ key = kmalloc(len + 1,GFP_KERNEL);
+ if (!key) {
+ rc = -ENOMEM;
+ goto bad;
+ }
+ rc = next_entry(key, fp, len);
+ if (rc < 0)
+ goto bad;
+ key[len] = 0;
+
+ if (len2) {
+ cladatum->comkey = kmalloc(len2 + 1,GFP_KERNEL);
+ if (!cladatum->comkey) {
+ rc = -ENOMEM;
+ goto bad;
+ }
+ rc = next_entry(cladatum->comkey, fp, len2);
+ if (rc < 0)
+ goto bad;
+ cladatum->comkey[len2] = 0;
+
+ cladatum->comdatum = hashtab_search(p->p_commons.table,
+ cladatum->comkey);
+ if (!cladatum->comdatum) {
+ printk(KERN_ERR "security: unknown common %s\n",
+ cladatum->comkey);
+ rc = -EINVAL;
+ goto bad;
+ }
+ }
+ for (i = 0; i < nel; i++) {
+ rc = perm_read(p, cladatum->permissions.table, fp);
+ if (rc)
+ goto bad;
+ }
+
+ rc = read_cons_helper(&cladatum->constraints, ncons, 0, fp);
+ if (rc)
+ goto bad;
+
+ if (p->policyvers >= POLICYDB_VERSION_VALIDATETRANS) {
+ /* grab the validatetrans rules */
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc < 0)
+ goto bad;
+ ncons = le32_to_cpu(buf[0]);
+ rc = read_cons_helper(&cladatum->validatetrans, ncons, 1, fp);
+ if (rc)
+ goto bad;
+ }
+
+ rc = hashtab_insert(h, key, cladatum);
+ if (rc)
+ goto bad;
+
+ rc = 0;
+out:
+ return rc;
+bad:
+ class_destroy(key, cladatum, NULL);
+ goto out;
+}
+
+static int role_read(struct policydb *p, struct hashtab *h, void *fp)
+{
+ char *key = NULL;
+ struct role_datum *role;
+ int rc;
+ u32 buf[2], len;
+
+ role = kmalloc(sizeof(*role), GFP_KERNEL);
+ if (!role) {
+ rc = -ENOMEM;
+ goto out;
+ }
+ memset(role, 0, sizeof(*role));
+
+ rc = next_entry(buf, fp, sizeof buf);
+ if (rc < 0)
+ goto bad;
+
+ len = le32_to_cpu(buf[0]);
+ role->value = le32_to_cpu(buf[1]);
+
+ key = kmalloc(len + 1,GFP_KERNEL);
+ if (!key) {
+ rc = -ENOMEM;
+ goto bad;
+ }
+ rc = next_entry(key, fp, len);
+ if (rc < 0)
+ goto bad;
+ key[len] = 0;
+
+ rc = ebitmap_read(&role->dominates, fp);
+ if (rc)
+ goto bad;
+
+ rc = ebitmap_read(&role->types, fp);
+ if (rc)
+ goto bad;
+
+ if (strcmp(key, OBJECT_R) == 0) {
+ if (role->value != OBJECT_R_VAL) {
+ printk(KERN_ERR "Role %s has wrong value %d\n",
+ OBJECT_R, role->value);
+ rc = -EINVAL;
+ goto bad;
+ }
+ rc = 0;
+ goto bad;
+ }
+
+ rc = hashtab_insert(h, key, role);
+ if (rc)
+ goto bad;
+out:
+ return rc;
+bad:
+ role_destroy(key, role, NULL);
+ goto out;
+}
+
+static int type_read(struct policydb *p, struct hashtab *h, void *fp)
+{
+ char *key = NULL;
+ struct type_datum *typdatum;
+ int rc;
+ u32 buf[3], len;
+
+ typdatum = kmalloc(sizeof(*typdatum),GFP_KERNEL);
+ if (!typdatum) {
+ rc = -ENOMEM;
+ return rc;
+ }
+ memset(typdatum, 0, sizeof(*typdatum));
+
+ rc = next_entry(buf, fp, sizeof buf);
+ if (rc < 0)
+ goto bad;
+
+ len = le32_to_cpu(buf[0]);
+ typdatum->value = le32_to_cpu(buf[1]);
+ typdatum->primary = le32_to_cpu(buf[2]);
+
+ key = kmalloc(len + 1,GFP_KERNEL);
+ if (!key) {
+ rc = -ENOMEM;
+ goto bad;
+ }
+ rc = next_entry(key, fp, len);
+ if (rc < 0)
+ goto bad;
+ key[len] = 0;
+
+ rc = hashtab_insert(h, key, typdatum);
+ if (rc)
+ goto bad;
+out:
+ return rc;
+bad:
+ type_destroy(key, typdatum, NULL);
+ goto out;
+}
+
+
+/*
+ * Read a MLS level structure from a policydb binary
+ * representation file.
+ */
+static int mls_read_level(struct mls_level *lp, void *fp)
+{
+ u32 buf[1];
+ int rc;
+
+ memset(lp, 0, sizeof(*lp));
+
+ rc = next_entry(buf, fp, sizeof buf);
+ if (rc < 0) {
+ printk(KERN_ERR "security: mls: truncated level\n");
+ goto bad;
+ }
+ lp->sens = le32_to_cpu(buf[0]);
+
+ if (ebitmap_read(&lp->cat, fp)) {
+ printk(KERN_ERR "security: mls: error reading level "
+ "categories\n");
+ goto bad;
+ }
+ return 0;
+
+bad:
+ return -EINVAL;
+}
+
+static int user_read(struct policydb *p, struct hashtab *h, void *fp)
+{
+ char *key = NULL;
+ struct user_datum *usrdatum;
+ int rc;
+ u32 buf[2], len;
+
+ usrdatum = kmalloc(sizeof(*usrdatum), GFP_KERNEL);
+ if (!usrdatum) {
+ rc = -ENOMEM;
+ goto out;
+ }
+ memset(usrdatum, 0, sizeof(*usrdatum));
+
+ rc = next_entry(buf, fp, sizeof buf);
+ if (rc < 0)
+ goto bad;
+
+ len = le32_to_cpu(buf[0]);
+ usrdatum->value = le32_to_cpu(buf[1]);
+
+ key = kmalloc(len + 1,GFP_KERNEL);
+ if (!key) {
+ rc = -ENOMEM;
+ goto bad;
+ }
+ rc = next_entry(key, fp, len);
+ if (rc < 0)
+ goto bad;
+ key[len] = 0;
+
+ rc = ebitmap_read(&usrdatum->roles, fp);
+ if (rc)
+ goto bad;
+
+ if (p->policyvers >= POLICYDB_VERSION_MLS) {
+ rc = mls_read_range_helper(&usrdatum->range, fp);
+ if (rc)
+ goto bad;
+ rc = mls_read_level(&usrdatum->dfltlevel, fp);
+ if (rc)
+ goto bad;
+ }
+
+ rc = hashtab_insert(h, key, usrdatum);
+ if (rc)
+ goto bad;
+out:
+ return rc;
+bad:
+ user_destroy(key, usrdatum, NULL);
+ goto out;
+}
+
+static int sens_read(struct policydb *p, struct hashtab *h, void *fp)
+{
+ char *key = NULL;
+ struct level_datum *levdatum;
+ int rc;
+ u32 buf[2], len;
+
+ levdatum = kmalloc(sizeof(*levdatum), GFP_ATOMIC);
+ if (!levdatum) {
+ rc = -ENOMEM;
+ goto out;
+ }
+ memset(levdatum, 0, sizeof(*levdatum));
+
+ rc = next_entry(buf, fp, sizeof buf);
+ if (rc < 0)
+ goto bad;
+
+ len = le32_to_cpu(buf[0]);
+ levdatum->isalias = le32_to_cpu(buf[1]);
+
+ key = kmalloc(len + 1,GFP_ATOMIC);
+ if (!key) {
+ rc = -ENOMEM;
+ goto bad;
+ }
+ rc = next_entry(key, fp, len);
+ if (rc < 0)
+ goto bad;
+ key[len] = 0;
+
+ levdatum->level = kmalloc(sizeof(struct mls_level), GFP_ATOMIC);
+ if (!levdatum->level) {
+ rc = -ENOMEM;
+ goto bad;
+ }
+ if (mls_read_level(levdatum->level, fp)) {
+ rc = -EINVAL;
+ goto bad;
+ }
+
+ rc = hashtab_insert(h, key, levdatum);
+ if (rc)
+ goto bad;
+out:
+ return rc;
+bad:
+ sens_destroy(key, levdatum, NULL);
+ goto out;
+}
+
+static int cat_read(struct policydb *p, struct hashtab *h, void *fp)
+{
+ char *key = NULL;
+ struct cat_datum *catdatum;
+ int rc;
+ u32 buf[3], len;
+
+ catdatum = kmalloc(sizeof(*catdatum), GFP_ATOMIC);
+ if (!catdatum) {
+ rc = -ENOMEM;
+ goto out;
+ }
+ memset(catdatum, 0, sizeof(*catdatum));
+
+ rc = next_entry(buf, fp, sizeof buf);
+ if (rc < 0)
+ goto bad;
+
+ len = le32_to_cpu(buf[0]);
+ catdatum->value = le32_to_cpu(buf[1]);
+ catdatum->isalias = le32_to_cpu(buf[2]);
+
+ key = kmalloc(len + 1,GFP_ATOMIC);
+ if (!key) {
+ rc = -ENOMEM;
+ goto bad;
+ }
+ rc = next_entry(key, fp, len);
+ if (rc < 0)
+ goto bad;
+ key[len] = 0;
+
+ rc = hashtab_insert(h, key, catdatum);
+ if (rc)
+ goto bad;
+out:
+ return rc;
+
+bad:
+ cat_destroy(key, catdatum, NULL);
+ goto out;
+}
+
+static int (*read_f[SYM_NUM]) (struct policydb *p, struct hashtab *h, void *fp) =
+{
+ common_read,
+ class_read,
+ role_read,
+ type_read,
+ user_read,
+ cond_read_bool,
+ sens_read,
+ cat_read,
+};
+
+extern int ss_initialized;
+
+/*
+ * Read the configuration data from a policy database binary
+ * representation file into a policy database structure.
+ */
+int policydb_read(struct policydb *p, void *fp)
+{
+ struct role_allow *ra, *lra;
+ struct role_trans *tr, *ltr;
+ struct ocontext *l, *c, *newc;
+ struct genfs *genfs_p, *genfs, *newgenfs;
+ int i, j, rc;
+ u32 buf[8], len, len2, config, nprim, nel, nel2;
+ char *policydb_str;
+ struct policydb_compat_info *info;
+ struct range_trans *rt, *lrt;
+
+ config = 0;
+
+ rc = policydb_init(p);
+ if (rc)
+ goto out;
+
+ /* Read the magic number and string length. */
+ rc = next_entry(buf, fp, sizeof(u32)* 2);
+ if (rc < 0)
+ goto bad;
+
+ for (i = 0; i < 2; i++)
+ buf[i] = le32_to_cpu(buf[i]);
+
+ if (buf[0] != POLICYDB_MAGIC) {
+ printk(KERN_ERR "security: policydb magic number 0x%x does "
+ "not match expected magic number 0x%x\n",
+ buf[0], POLICYDB_MAGIC);
+ goto bad;
+ }
+
+ len = buf[1];
+ if (len != strlen(POLICYDB_STRING)) {
+ printk(KERN_ERR "security: policydb string length %d does not "
+ "match expected length %Zu\n",
+ len, strlen(POLICYDB_STRING));
+ goto bad;
+ }
+ policydb_str = kmalloc(len + 1,GFP_KERNEL);
+ if (!policydb_str) {
+ printk(KERN_ERR "security: unable to allocate memory for policydb "
+ "string of length %d\n", len);
+ rc = -ENOMEM;
+ goto bad;
+ }
+ rc = next_entry(policydb_str, fp, len);
+ if (rc < 0) {
+ printk(KERN_ERR "security: truncated policydb string identifier\n");
+ kfree(policydb_str);
+ goto bad;
+ }
+ policydb_str[len] = 0;
+ if (strcmp(policydb_str, POLICYDB_STRING)) {
+ printk(KERN_ERR "security: policydb string %s does not match "
+ "my string %s\n", policydb_str, POLICYDB_STRING);
+ kfree(policydb_str);
+ goto bad;
+ }
+ /* Done with policydb_str. */
+ kfree(policydb_str);
+ policydb_str = NULL;
+
+ /* Read the version, config, and table sizes. */
+ rc = next_entry(buf, fp, sizeof(u32)*4);
+ if (rc < 0)
+ goto bad;
+ for (i = 0; i < 4; i++)
+ buf[i] = le32_to_cpu(buf[i]);
+
+ p->policyvers = buf[0];
+ if (p->policyvers < POLICYDB_VERSION_MIN ||
+ p->policyvers > POLICYDB_VERSION_MAX) {
+ printk(KERN_ERR "security: policydb version %d does not match "
+ "my version range %d-%d\n",
+ buf[0], POLICYDB_VERSION_MIN, POLICYDB_VERSION_MAX);
+ goto bad;
+ }
+
+ if ((buf[1] & POLICYDB_CONFIG_MLS)) {
+ if (ss_initialized && !selinux_mls_enabled) {
+ printk(KERN_ERR "Cannot switch between non-MLS and MLS "
+ "policies\n");
+ goto bad;
+ }
+ selinux_mls_enabled = 1;
+ config |= POLICYDB_CONFIG_MLS;
+
+ if (p->policyvers < POLICYDB_VERSION_MLS) {
+ printk(KERN_ERR "security policydb version %d (MLS) "
+ "not backwards compatible\n", p->policyvers);
+ goto bad;
+ }
+ } else {
+ if (ss_initialized && selinux_mls_enabled) {
+ printk(KERN_ERR "Cannot switch between MLS and non-MLS "
+ "policies\n");
+ goto bad;
+ }
+ }
+
+ info = policydb_lookup_compat(p->policyvers);
+ if (!info) {
+ printk(KERN_ERR "security: unable to find policy compat info "
+ "for version %d\n", p->policyvers);
+ goto bad;
+ }
+
+ if (buf[2] != info->sym_num || buf[3] != info->ocon_num) {
+ printk(KERN_ERR "security: policydb table sizes (%d,%d) do "
+ "not match mine (%d,%d)\n", buf[2], buf[3],
+ info->sym_num, info->ocon_num);
+ goto bad;
+ }
+
+ for (i = 0; i < info->sym_num; i++) {
+ rc = next_entry(buf, fp, sizeof(u32)*2);
+ if (rc < 0)
+ goto bad;
+ nprim = le32_to_cpu(buf[0]);
+ nel = le32_to_cpu(buf[1]);
+ for (j = 0; j < nel; j++) {
+ rc = read_f[i](p, p->symtab[i].table, fp);
+ if (rc)
+ goto bad;
+ }
+
+ p->symtab[i].nprim = nprim;
+ }
+
+ rc = avtab_read(&p->te_avtab, fp, config);
+ if (rc)
+ goto bad;
+
+ if (p->policyvers >= POLICYDB_VERSION_BOOL) {
+ rc = cond_read_list(p, fp);
+ if (rc)
+ goto bad;
+ }
+
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc < 0)
+ goto bad;
+ nel = le32_to_cpu(buf[0]);
+ ltr = NULL;
+ for (i = 0; i < nel; i++) {
+ tr = kmalloc(sizeof(*tr), GFP_KERNEL);
+ if (!tr) {
+ rc = -ENOMEM;
+ goto bad;
+ }
+ memset(tr, 0, sizeof(*tr));
+ if (ltr) {
+ ltr->next = tr;
+ } else {
+ p->role_tr = tr;
+ }
+ rc = next_entry(buf, fp, sizeof(u32)*3);
+ if (rc < 0)
+ goto bad;
+ tr->role = le32_to_cpu(buf[0]);
+ tr->type = le32_to_cpu(buf[1]);
+ tr->new_role = le32_to_cpu(buf[2]);
+ ltr = tr;
+ }
+
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc < 0)
+ goto bad;
+ nel = le32_to_cpu(buf[0]);
+ lra = NULL;
+ for (i = 0; i < nel; i++) {
+ ra = kmalloc(sizeof(*ra), GFP_KERNEL);
+ if (!ra) {
+ rc = -ENOMEM;
+ goto bad;
+ }
+ memset(ra, 0, sizeof(*ra));
+ if (lra) {
+ lra->next = ra;
+ } else {
+ p->role_allow = ra;
+ }
+ rc = next_entry(buf, fp, sizeof(u32)*2);
+ if (rc < 0)
+ goto bad;
+ ra->role = le32_to_cpu(buf[0]);
+ ra->new_role = le32_to_cpu(buf[1]);
+ lra = ra;
+ }
+
+ rc = policydb_index_classes(p);
+ if (rc)
+ goto bad;
+
+ rc = policydb_index_others(p);
+ if (rc)
+ goto bad;
+
+ for (i = 0; i < info->ocon_num; i++) {
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc < 0)
+ goto bad;
+ nel = le32_to_cpu(buf[0]);
+ l = NULL;
+ for (j = 0; j < nel; j++) {
+ c = kmalloc(sizeof(*c), GFP_KERNEL);
+ if (!c) {
+ rc = -ENOMEM;
+ goto bad;
+ }
+ memset(c, 0, sizeof(*c));
+ if (l) {
+ l->next = c;
+ } else {
+ p->ocontexts[i] = c;
+ }
+ l = c;
+ rc = -EINVAL;
+ switch (i) {
+ case OCON_ISID:
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc < 0)
+ goto bad;
+ c->sid[0] = le32_to_cpu(buf[0]);
+ rc = context_read_and_validate(&c->context[0], p, fp);
+ if (rc)
+ goto bad;
+ break;
+ case OCON_FS:
+ case OCON_NETIF:
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc < 0)
+ goto bad;
+ len = le32_to_cpu(buf[0]);
+ c->u.name = kmalloc(len + 1,GFP_KERNEL);
+ if (!c->u.name) {
+ rc = -ENOMEM;
+ goto bad;
+ }
+ rc = next_entry(c->u.name, fp, len);
+ if (rc < 0)
+ goto bad;
+ c->u.name[len] = 0;
+ rc = context_read_and_validate(&c->context[0], p, fp);
+ if (rc)
+ goto bad;
+ rc = context_read_and_validate(&c->context[1], p, fp);
+ if (rc)
+ goto bad;
+ break;
+ case OCON_PORT:
+ rc = next_entry(buf, fp, sizeof(u32)*3);
+ if (rc < 0)
+ goto bad;
+ c->u.port.protocol = le32_to_cpu(buf[0]);
+ c->u.port.low_port = le32_to_cpu(buf[1]);
+ c->u.port.high_port = le32_to_cpu(buf[2]);
+ rc = context_read_and_validate(&c->context[0], p, fp);
+ if (rc)
+ goto bad;
+ break;
+ case OCON_NODE:
+ rc = next_entry(buf, fp, sizeof(u32)* 2);
+ if (rc < 0)
+ goto bad;
+ c->u.node.addr = le32_to_cpu(buf[0]);
+ c->u.node.mask = le32_to_cpu(buf[1]);
+ rc = context_read_and_validate(&c->context[0], p, fp);
+ if (rc)
+ goto bad;
+ break;
+ case OCON_FSUSE:
+ rc = next_entry(buf, fp, sizeof(u32)*2);
+ if (rc < 0)
+ goto bad;
+ c->v.behavior = le32_to_cpu(buf[0]);
+ if (c->v.behavior > SECURITY_FS_USE_NONE)
+ goto bad;
+ len = le32_to_cpu(buf[1]);
+ c->u.name = kmalloc(len + 1,GFP_KERNEL);
+ if (!c->u.name) {
+ rc = -ENOMEM;
+ goto bad;
+ }
+ rc = next_entry(c->u.name, fp, len);
+ if (rc < 0)
+ goto bad;
+ c->u.name[len] = 0;
+ rc = context_read_and_validate(&c->context[0], p, fp);
+ if (rc)
+ goto bad;
+ break;
+ case OCON_NODE6: {
+ int k;
+
+ rc = next_entry(buf, fp, sizeof(u32) * 8);
+ if (rc < 0)
+ goto bad;
+ for (k = 0; k < 4; k++)
+ c->u.node6.addr[k] = le32_to_cpu(buf[k]);
+ for (k = 0; k < 4; k++)
+ c->u.node6.mask[k] = le32_to_cpu(buf[k+4]);
+ if (context_read_and_validate(&c->context[0], p, fp))
+ goto bad;
+ break;
+ }
+ }
+ }
+ }
+
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc < 0)
+ goto bad;
+ nel = le32_to_cpu(buf[0]);
+ genfs_p = NULL;
+ rc = -EINVAL;
+ for (i = 0; i < nel; i++) {
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc < 0)
+ goto bad;
+ len = le32_to_cpu(buf[0]);
+ newgenfs = kmalloc(sizeof(*newgenfs), GFP_KERNEL);
+ if (!newgenfs) {
+ rc = -ENOMEM;
+ goto bad;
+ }
+ memset(newgenfs, 0, sizeof(*newgenfs));
+
+ newgenfs->fstype = kmalloc(len + 1,GFP_KERNEL);
+ if (!newgenfs->fstype) {
+ rc = -ENOMEM;
+ kfree(newgenfs);
+ goto bad;
+ }
+ rc = next_entry(newgenfs->fstype, fp, len);
+ if (rc < 0) {
+ kfree(newgenfs->fstype);
+ kfree(newgenfs);
+ goto bad;
+ }
+ newgenfs->fstype[len] = 0;
+ for (genfs_p = NULL, genfs = p->genfs; genfs;
+ genfs_p = genfs, genfs = genfs->next) {
+ if (strcmp(newgenfs->fstype, genfs->fstype) == 0) {
+ printk(KERN_ERR "security: dup genfs "
+ "fstype %s\n", newgenfs->fstype);
+ kfree(newgenfs->fstype);
+ kfree(newgenfs);
+ goto bad;
+ }
+ if (strcmp(newgenfs->fstype, genfs->fstype) < 0)
+ break;
+ }
+ newgenfs->next = genfs;
+ if (genfs_p)
+ genfs_p->next = newgenfs;
+ else
+ p->genfs = newgenfs;
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc < 0)
+ goto bad;
+ nel2 = le32_to_cpu(buf[0]);
+ for (j = 0; j < nel2; j++) {
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc < 0)
+ goto bad;
+ len = le32_to_cpu(buf[0]);
+
+ newc = kmalloc(sizeof(*newc), GFP_KERNEL);
+ if (!newc) {
+ rc = -ENOMEM;
+ goto bad;
+ }
+ memset(newc, 0, sizeof(*newc));
+
+ newc->u.name = kmalloc(len + 1,GFP_KERNEL);
+ if (!newc->u.name) {
+ rc = -ENOMEM;
+ goto bad_newc;
+ }
+ rc = next_entry(newc->u.name, fp, len);
+ if (rc < 0)
+ goto bad_newc;
+ newc->u.name[len] = 0;
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc < 0)
+ goto bad_newc;
+ newc->v.sclass = le32_to_cpu(buf[0]);
+ if (context_read_and_validate(&newc->context[0], p, fp))
+ goto bad_newc;
+ for (l = NULL, c = newgenfs->head; c;
+ l = c, c = c->next) {
+ if (!strcmp(newc->u.name, c->u.name) &&
+ (!c->v.sclass || !newc->v.sclass ||
+ newc->v.sclass == c->v.sclass)) {
+ printk(KERN_ERR "security: dup genfs "
+ "entry (%s,%s)\n",
+ newgenfs->fstype, c->u.name);
+ goto bad_newc;
+ }
+ len = strlen(newc->u.name);
+ len2 = strlen(c->u.name);
+ if (len > len2)
+ break;
+ }
+
+ newc->next = c;
+ if (l)
+ l->next = newc;
+ else
+ newgenfs->head = newc;
+ }
+ }
+
+ if (p->policyvers >= POLICYDB_VERSION_MLS) {
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc < 0)
+ goto bad;
+ nel = le32_to_cpu(buf[0]);
+ lrt = NULL;
+ for (i = 0; i < nel; i++) {
+ rt = kmalloc(sizeof(*rt), GFP_KERNEL);
+ if (!rt) {
+ rc = -ENOMEM;
+ goto bad;
+ }
+ memset(rt, 0, sizeof(*rt));
+ if (lrt)
+ lrt->next = rt;
+ else
+ p->range_tr = rt;
+ rc = next_entry(buf, fp, (sizeof(u32) * 2));
+ if (rc < 0)
+ goto bad;
+ rt->dom = le32_to_cpu(buf[0]);
+ rt->type = le32_to_cpu(buf[1]);
+ rc = mls_read_range_helper(&rt->range, fp);
+ if (rc)
+ goto bad;
+ lrt = rt;
+ }
+ }
+
+ rc = 0;
+out:
+ return rc;
+bad_newc:
+ ocontext_destroy(newc,OCON_FSUSE);
+bad:
+ if (!rc)
+ rc = -EINVAL;
+ policydb_destroy(p);
+ goto out;
+}