Initial import of modified Linux 2.6.28 tree

Original upstream URL:
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git | branch linux-2.6.28.y

1 files changed, 2151 insertions, 0 deletions

diff --git a/security/selinux/ss/policydb.c b/security/selinux/ss/policydb.c
new file mode 100644
index 0000000..72e4a54
--- /dev/null
+++ b/security/selinux/ss/policydb.c
@@ -0,0 +1,2151 @@
+/*
+ * 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
+ *
+ * Updated: Hewlett-Packard <paul.moore@hp.com>
+ *
+ *      Added support for the policy capability bitmap
+ *
+ * Copyright (C) 2007 Hewlett-Packard Development Company, L.P.
+ * 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/sched.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/audit.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;
+
+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,
+	},
+	{
+		.version	= POLICYDB_VERSION_AVTAB,
+		.sym_num	= SYM_NUM,
+		.ocon_num	= OCON_NUM,
+	},
+	{
+		.version	= POLICYDB_VERSION_RANGETRANS,
+		.sym_num	= SYM_NUM,
+		.ocon_num	= OCON_NUM,
+	},
+	{
+		.version	= POLICYDB_VERSION_POLCAP,
+		.sym_num	= SYM_NUM,
+		.ocon_num	= OCON_NUM,
+	},
+	{
+		.version	= POLICYDB_VERSION_PERMISSIVE,
+		.sym_num	= SYM_NUM,
+		.ocon_num	= OCON_NUM,
+	},
+	{
+		.version	= POLICYDB_VERSION_BOUNDARY,
+		.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 < ARRAY_SIZE(policydb_compat); 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 = kzalloc(sizeof(*role), GFP_KERNEL);
+	if (!role) {
+		rc = -ENOMEM;
+		goto out;
+	}
+	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_symtab;
+
+	rc = cond_policydb_init(p);
+	if (rc)
+		goto out_free_symtab;
+
+	ebitmap_init(&p->policycaps);
+	ebitmap_init(&p->permissive_map);
+
+out:
+	return rc;
+
+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
+	    || role->bounds > 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
+		    || typdatum->bounds > p->p_types.nprim)
+			return -EINVAL;
+		p->p_type_val_to_name[typdatum->value - 1] = key;
+		p->type_val_to_struct[typdatum->value - 1] = typdatum;
+	}
+
+	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
+	    || usrdatum->bounds > 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_DEBUG "SELinux: %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_DEBUG "SELinux:  %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_DEBUG "SELinux:  %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;
+	}
+
+	p->type_val_to_struct =
+		kmalloc(p->p_types.nprim * sizeof(*(p->type_val_to_struct)),
+			GFP_KERNEL);
+	if (!p->type_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 cls_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,
+	cls_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;
+	struct role_allow *ra, *lra = NULL;
+	struct role_trans *tr, *ltr = NULL;
+	struct range_trans *rt, *lrt = NULL;
+
+	for (i = 0; i < SYM_NUM; i++) {
+		cond_resched();
+		hashtab_map(p->symtab[i].table, destroy_f[i], NULL);
+		hashtab_destroy(p->symtab[i].table);
+	}
+
+	for (i = 0; i < SYM_NUM; i++)
+		kfree(p->sym_val_to_name[i]);
+
+	kfree(p->class_val_to_struct);
+	kfree(p->role_val_to_struct);
+	kfree(p->user_val_to_struct);
+	kfree(p->type_val_to_struct);
+
+	avtab_destroy(&p->te_avtab);
+
+	for (i = 0; i < OCON_NUM; i++) {
+		cond_resched();
+		c = p->ocontexts[i];
+		while (c) {
+			ctmp = c;
+			c = c->next;
+			ocontext_destroy(ctmp, i);
+		}
+		p->ocontexts[i] = NULL;
+	}
+
+	g = p->genfs;
+	while (g) {
+		cond_resched();
+		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);
+	}
+	p->genfs = NULL;
+
+	cond_policydb_destroy(p);
+
+	for (tr = p->role_tr; tr; tr = tr->next) {
+		cond_resched();
+		kfree(ltr);
+		ltr = tr;
+	}
+	kfree(ltr);
+
+	for (ra = p->role_allow; ra; ra = ra->next) {
+		cond_resched();
+		kfree(lra);
+		lra = ra;
+	}
+	kfree(lra);
+
+	for (rt = p->range_tr; rt; rt = rt->next) {
+		cond_resched();
+		if (lrt) {
+			ebitmap_destroy(&lrt->target_range.level[0].cat);
+			ebitmap_destroy(&lrt->target_range.level[1].cat);
+			kfree(lrt);
+		}
+		lrt = rt;
+	}
+	if (lrt) {
+		ebitmap_destroy(&lrt->target_range.level[0].cat);
+		ebitmap_destroy(&lrt->target_range.level[1].cat);
+		kfree(lrt);
+	}
+
+	if (p->type_attr_map) {
+		for (i = 0; i < p->p_types.nprim; i++)
+			ebitmap_destroy(&p->type_attr_map[i]);
+	}
+	kfree(p->type_attr_map);
+	kfree(p->undefined_perms);
+	ebitmap_destroy(&p->policycaps);
+	ebitmap_destroy(&p->permissive_map);
+
+	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 "SELinux:  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 "SELinux:  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 "SELinux:  unable to load initial "
+			       "SID %s.\n", c->u.name);
+			rc = -EINVAL;
+			goto out;
+		}
+	}
+out:
+	return rc;
+}
+
+int policydb_class_isvalid(struct policydb *p, unsigned int class)
+{
+	if (!class || class > p->p_classes.nprim)
+		return 0;
+	return 1;
+}
+
+int policydb_role_isvalid(struct policydb *p, unsigned int role)
+{
+	if (!role || role > p->p_roles.nprim)
+		return 0;
+	return 1;
+}
+
+int policydb_type_isvalid(struct policydb *p, unsigned int type)
+{
+	if (!type || type > p->p_types.nprim)
+		return 0;
+	return 1;
+}
+
+/*
+ * 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)
+{
+	__le32 buf[2];
+	u32 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 "SELinux: mls:  range overflow\n");
+		rc = -EINVAL;
+		goto out;
+	}
+	rc = next_entry(buf, fp, sizeof(u32) * items);
+	if (rc < 0) {
+		printk(KERN_ERR "SELinux: 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 "SELinux: mls:  error reading low "
+		       "categories\n");
+		goto out;
+	}
+	if (items > 1) {
+		rc = ebitmap_read(&r->level[1].cat, fp);
+		if (rc) {
+			printk(KERN_ERR "SELinux: 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 "SELinux: 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)
+{
+	__le32 buf[3];
+	int rc;
+
+	rc = next_entry(buf, fp, sizeof buf);
+	if (rc < 0) {
+		printk(KERN_ERR "SELinux: 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 "SELinux: error reading MLS range of "
+			       "context\n");
+			rc = -EINVAL;
+			goto out;
+		}
+	}
+
+	if (!policydb_context_isvalid(p, c)) {
+		printk(KERN_ERR "SELinux:  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;
+	__le32 buf[2];
+	u32 len;
+
+	perdatum = kzalloc(sizeof(*perdatum), GFP_KERNEL);
+	if (!perdatum) {
+		rc = -ENOMEM;
+		goto out;
+	}
+
+	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;
+	__le32 buf[4];
+	u32 len, nel;
+	int i, rc;
+
+	comdatum = kzalloc(sizeof(*comdatum), GFP_KERNEL);
+	if (!comdatum) {
+		rc = -ENOMEM;
+		goto out;
+	}
+
+	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;
+	__le32 buf[3];
+	u32 nexpr;
+	int rc, i, j, depth;
+
+	lc = NULL;
+	for (i = 0; i < ncons; i++) {
+		c = kzalloc(sizeof(*c), GFP_KERNEL);
+		if (!c)
+			return -ENOMEM;
+
+		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 = kzalloc(sizeof(*e), GFP_KERNEL);
+			if (!e)
+				return -ENOMEM;
+
+			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;
+	__le32 buf[6];
+	u32 len, len2, ncons, nel;
+	int i, rc;
+
+	cladatum = kzalloc(sizeof(*cladatum), GFP_KERNEL);
+	if (!cladatum) {
+		rc = -ENOMEM;
+		goto out;
+	}
+
+	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 "SELinux:  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:
+	cls_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, to_read = 2;
+	__le32 buf[3];
+	u32 len;
+
+	role = kzalloc(sizeof(*role), GFP_KERNEL);
+	if (!role) {
+		rc = -ENOMEM;
+		goto out;
+	}
+
+	if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
+		to_read = 3;
+
+	rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
+	if (rc < 0)
+		goto bad;
+
+	len = le32_to_cpu(buf[0]);
+	role->value = le32_to_cpu(buf[1]);
+	if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
+		role->bounds = 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 = 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 "SELinux: 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, to_read = 3;
+	__le32 buf[4];
+	u32 len;
+
+	typdatum = kzalloc(sizeof(*typdatum), GFP_KERNEL);
+	if (!typdatum) {
+		rc = -ENOMEM;
+		return rc;
+	}
+
+	if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
+		to_read = 4;
+
+	rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
+	if (rc < 0)
+		goto bad;
+
+	len = le32_to_cpu(buf[0]);
+	typdatum->value = le32_to_cpu(buf[1]);
+	if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) {
+		u32 prop = le32_to_cpu(buf[2]);
+
+		if (prop & TYPEDATUM_PROPERTY_PRIMARY)
+			typdatum->primary = 1;
+		if (prop & TYPEDATUM_PROPERTY_ATTRIBUTE)
+			typdatum->attribute = 1;
+
+		typdatum->bounds = le32_to_cpu(buf[3]);
+	} else {
+		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)
+{
+	__le32 buf[1];
+	int rc;
+
+	memset(lp, 0, sizeof(*lp));
+
+	rc = next_entry(buf, fp, sizeof buf);
+	if (rc < 0) {
+		printk(KERN_ERR "SELinux: mls: truncated level\n");
+		goto bad;
+	}
+	lp->sens = le32_to_cpu(buf[0]);
+
+	if (ebitmap_read(&lp->cat, fp)) {
+		printk(KERN_ERR "SELinux: 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, to_read = 2;
+	__le32 buf[3];
+	u32 len;
+
+	usrdatum = kzalloc(sizeof(*usrdatum), GFP_KERNEL);
+	if (!usrdatum) {
+		rc = -ENOMEM;
+		goto out;
+	}
+
+	if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
+		to_read = 3;
+
+	rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
+	if (rc < 0)
+		goto bad;
+
+	len = le32_to_cpu(buf[0]);
+	usrdatum->value = le32_to_cpu(buf[1]);
+	if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
+		usrdatum->bounds = 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 = 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;
+	__le32 buf[2];
+	u32 len;
+
+	levdatum = kzalloc(sizeof(*levdatum), GFP_ATOMIC);
+	if (!levdatum) {
+		rc = -ENOMEM;
+		goto out;
+	}
+
+	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;
+	__le32 buf[3];
+	u32 len;
+
+	catdatum = kzalloc(sizeof(*catdatum), GFP_ATOMIC);
+	if (!catdatum) {
+		rc = -ENOMEM;
+		goto out;
+	}
+
+	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,
+};
+
+static int user_bounds_sanity_check(void *key, void *datum, void *datap)
+{
+	struct user_datum *upper, *user;
+	struct policydb *p = datap;
+	int depth = 0;
+
+	upper = user = datum;
+	while (upper->bounds) {
+		struct ebitmap_node *node;
+		unsigned long bit;
+
+		if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
+			printk(KERN_ERR "SELinux: user %s: "
+			       "too deep or looped boundary",
+			       (char *) key);
+			return -EINVAL;
+		}
+
+		upper = p->user_val_to_struct[upper->bounds - 1];
+		ebitmap_for_each_positive_bit(&user->roles, node, bit) {
+			if (ebitmap_get_bit(&upper->roles, bit))
+				continue;
+
+			printk(KERN_ERR
+			       "SELinux: boundary violated policy: "
+			       "user=%s role=%s bounds=%s\n",
+			       p->p_user_val_to_name[user->value - 1],
+			       p->p_role_val_to_name[bit],
+			       p->p_user_val_to_name[upper->value - 1]);
+
+			return -EINVAL;
+		}
+	}
+
+	return 0;
+}
+
+static int role_bounds_sanity_check(void *key, void *datum, void *datap)
+{
+	struct role_datum *upper, *role;
+	struct policydb *p = datap;
+	int depth = 0;
+
+	upper = role = datum;
+	while (upper->bounds) {
+		struct ebitmap_node *node;
+		unsigned long bit;
+
+		if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
+			printk(KERN_ERR "SELinux: role %s: "
+			       "too deep or looped bounds\n",
+			       (char *) key);
+			return -EINVAL;
+		}
+
+		upper = p->role_val_to_struct[upper->bounds - 1];
+		ebitmap_for_each_positive_bit(&role->types, node, bit) {
+			if (ebitmap_get_bit(&upper->types, bit))
+				continue;
+
+			printk(KERN_ERR
+			       "SELinux: boundary violated policy: "
+			       "role=%s type=%s bounds=%s\n",
+			       p->p_role_val_to_name[role->value - 1],
+			       p->p_type_val_to_name[bit],
+			       p->p_role_val_to_name[upper->value - 1]);
+
+			return -EINVAL;
+		}
+	}
+
+	return 0;
+}
+
+static int type_bounds_sanity_check(void *key, void *datum, void *datap)
+{
+	struct type_datum *upper, *type;
+	struct policydb *p = datap;
+	int depth = 0;
+
+	upper = type = datum;
+	while (upper->bounds) {
+		if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
+			printk(KERN_ERR "SELinux: type %s: "
+			       "too deep or looped boundary\n",
+			       (char *) key);
+			return -EINVAL;
+		}
+
+		upper = p->type_val_to_struct[upper->bounds - 1];
+		if (upper->attribute) {
+			printk(KERN_ERR "SELinux: type %s: "
+			       "bounded by attribute %s",
+			       (char *) key,
+			       p->p_type_val_to_name[upper->value - 1]);
+			return -EINVAL;
+		}
+	}
+
+	return 0;
+}
+
+static int policydb_bounds_sanity_check(struct policydb *p)
+{
+	int rc;
+
+	if (p->policyvers < POLICYDB_VERSION_BOUNDARY)
+		return 0;
+
+	rc = hashtab_map(p->p_users.table,
+			 user_bounds_sanity_check, p);
+	if (rc)
+		return rc;
+
+	rc = hashtab_map(p->p_roles.table,
+			 role_bounds_sanity_check, p);
+	if (rc)
+		return rc;
+
+	rc = hashtab_map(p->p_types.table,
+			 type_bounds_sanity_check, p);
+	if (rc)
+		return rc;
+
+	return 0;
+}
+
+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;
+	__le32 buf[4];
+	u32 nodebuf[8];
+	u32 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;
+
+	if (le32_to_cpu(buf[0]) != POLICYDB_MAGIC) {
+		printk(KERN_ERR "SELinux:  policydb magic number 0x%x does "
+		       "not match expected magic number 0x%x\n",
+		       le32_to_cpu(buf[0]), POLICYDB_MAGIC);
+		goto bad;
+	}
+
+	len = le32_to_cpu(buf[1]);
+	if (len != strlen(POLICYDB_STRING)) {
+		printk(KERN_ERR "SELinux:  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 "SELinux:  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 "SELinux:  truncated policydb string identifier\n");
+		kfree(policydb_str);
+		goto bad;
+	}
+	policydb_str[len] = '\0';
+	if (strcmp(policydb_str, POLICYDB_STRING)) {
+		printk(KERN_ERR "SELinux:  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;
+
+	p->policyvers = le32_to_cpu(buf[0]);
+	if (p->policyvers < POLICYDB_VERSION_MIN ||
+	    p->policyvers > POLICYDB_VERSION_MAX) {
+		printk(KERN_ERR "SELinux:  policydb version %d does not match "
+		       "my version range %d-%d\n",
+		       le32_to_cpu(buf[0]), POLICYDB_VERSION_MIN, POLICYDB_VERSION_MAX);
+		goto bad;
+	}
+
+	if ((le32_to_cpu(buf[1]) & POLICYDB_CONFIG_MLS)) {
+		if (ss_initialized && !selinux_mls_enabled) {
+			printk(KERN_ERR "SELinux: 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 "SELinux: security policydb version %d "
+				"(MLS) not backwards compatible\n",
+				p->policyvers);
+			goto bad;
+		}
+	} else {
+		if (ss_initialized && selinux_mls_enabled) {
+			printk(KERN_ERR "SELinux: Cannot switch between MLS and"
+				" non-MLS policies\n");
+			goto bad;
+		}
+	}
+	p->reject_unknown = !!(le32_to_cpu(buf[1]) & REJECT_UNKNOWN);
+	p->allow_unknown = !!(le32_to_cpu(buf[1]) & ALLOW_UNKNOWN);
+
+	if (p->policyvers >= POLICYDB_VERSION_POLCAP &&
+	    ebitmap_read(&p->policycaps, fp) != 0)
+		goto bad;
+
+	if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE &&
+	    ebitmap_read(&p->permissive_map, fp) != 0)
+		goto bad;
+
+	info = policydb_lookup_compat(p->policyvers);
+	if (!info) {
+		printk(KERN_ERR "SELinux:  unable to find policy compat info "
+		       "for version %d\n", p->policyvers);
+		goto bad;
+	}
+
+	if (le32_to_cpu(buf[2]) != info->sym_num ||
+		le32_to_cpu(buf[3]) != info->ocon_num) {
+		printk(KERN_ERR "SELinux:  policydb table sizes (%d,%d) do "
+		       "not match mine (%d,%d)\n", le32_to_cpu(buf[2]),
+			le32_to_cpu(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, p);
+	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 = kzalloc(sizeof(*tr), GFP_KERNEL);
+		if (!tr) {
+			rc = -ENOMEM;
+			goto bad;
+		}
+		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]);
+		if (!policydb_role_isvalid(p, tr->role) ||
+		    !policydb_type_isvalid(p, tr->type) ||
+		    !policydb_role_isvalid(p, tr->new_role)) {
+			rc = -EINVAL;
+			goto bad;
+		}
+		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 = kzalloc(sizeof(*ra), GFP_KERNEL);
+		if (!ra) {
+			rc = -ENOMEM;
+			goto bad;
+		}
+		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]);
+		if (!policydb_role_isvalid(p, ra->role) ||
+		    !policydb_role_isvalid(p, ra->new_role)) {
+			rc = -EINVAL;
+			goto bad;
+		}
+		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 = kzalloc(sizeof(*c), GFP_KERNEL);
+			if (!c) {
+				rc = -ENOMEM;
+				goto bad;
+			}
+			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(nodebuf, fp, sizeof(u32) * 2);
+				if (rc < 0)
+					goto bad;
+				c->u.node.addr = nodebuf[0]; /* network order */
+				c->u.node.mask = nodebuf[1]; /* network order */
+				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(nodebuf, fp, sizeof(u32) * 8);
+				if (rc < 0)
+					goto bad;
+				for (k = 0; k < 4; k++)
+					c->u.node6.addr[k] = nodebuf[k];
+				for (k = 0; k < 4; k++)
+					c->u.node6.mask[k] = nodebuf[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 = kzalloc(sizeof(*newgenfs), GFP_KERNEL);
+		if (!newgenfs) {
+			rc = -ENOMEM;
+			goto bad;
+		}
+
+		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 "SELinux:  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 = kzalloc(sizeof(*newc), GFP_KERNEL);
+			if (!newc) {
+				rc = -ENOMEM;
+				goto bad;
+			}
+
+			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 "SELinux:  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) {
+		int new_rangetr = p->policyvers >= POLICYDB_VERSION_RANGETRANS;
+		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 = kzalloc(sizeof(*rt), GFP_KERNEL);
+			if (!rt) {
+				rc = -ENOMEM;
+				goto bad;
+			}
+			if (lrt)
+				lrt->next = rt;
+			else
+				p->range_tr = rt;
+			rc = next_entry(buf, fp, (sizeof(u32) * 2));
+			if (rc < 0)
+				goto bad;
+			rt->source_type = le32_to_cpu(buf[0]);
+			rt->target_type = le32_to_cpu(buf[1]);
+			if (new_rangetr) {
+				rc = next_entry(buf, fp, sizeof(u32));
+				if (rc < 0)
+					goto bad;
+				rt->target_class = le32_to_cpu(buf[0]);
+			} else
+				rt->target_class = SECCLASS_PROCESS;
+			if (!policydb_type_isvalid(p, rt->source_type) ||
+			    !policydb_type_isvalid(p, rt->target_type) ||
+			    !policydb_class_isvalid(p, rt->target_class)) {
+				rc = -EINVAL;
+				goto bad;
+			}
+			rc = mls_read_range_helper(&rt->target_range, fp);
+			if (rc)
+				goto bad;
+			if (!mls_range_isvalid(p, &rt->target_range)) {
+				printk(KERN_WARNING "SELinux:  rangetrans:  invalid range\n");
+				goto bad;
+			}
+			lrt = rt;
+		}
+	}
+
+	p->type_attr_map = kmalloc(p->p_types.nprim*sizeof(struct ebitmap), GFP_KERNEL);
+	if (!p->type_attr_map)
+		goto bad;
+
+	for (i = 0; i < p->p_types.nprim; i++) {
+		ebitmap_init(&p->type_attr_map[i]);
+		if (p->policyvers >= POLICYDB_VERSION_AVTAB) {
+			if (ebitmap_read(&p->type_attr_map[i], fp))
+				goto bad;
+		}
+		/* add the type itself as the degenerate case */
+		if (ebitmap_set_bit(&p->type_attr_map[i], i, 1))
+				goto bad;
+	}
+
+	rc = policydb_bounds_sanity_check(p);
+	if (rc)
+		goto bad;
+
+	rc = 0;
+out:
+	return rc;
+bad_newc:
+	ocontext_destroy(newc, OCON_FSUSE);
+bad:
+	if (!rc)
+		rc = -EINVAL;
+	policydb_destroy(p);
+	goto out;
+}