Linux-2.6.12-rc2v2.6.12-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!

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 000000000000..14190efbf333
--- /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;
+}