1908 lines
38 KiB
C
1908 lines
38 KiB
C
/*
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* Implementation of the policy database.
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*
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* Author : Stephen Smalley, <sds@epoch.ncsc.mil>
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*/
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/*
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* Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com>
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*
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* Support for enhanced MLS infrastructure.
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*
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* Updated: Frank Mayer <mayerf@tresys.com> and Karl MacMillan <kmacmillan@tresys.com>
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*
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* Added conditional policy language extensions
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*
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* Copyright (C) 2004-2005 Trusted Computer Solutions, Inc.
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* Copyright (C) 2003 - 2004 Tresys Technology, LLC
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 2.
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*/
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/errno.h>
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#include "security.h"
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#include "policydb.h"
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#include "conditional.h"
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#include "mls.h"
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#define _DEBUG_HASHES
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#ifdef DEBUG_HASHES
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static char *symtab_name[SYM_NUM] = {
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"common prefixes",
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"classes",
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"roles",
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"types",
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"users",
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"bools",
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"levels",
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"categories",
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};
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#endif
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int selinux_mls_enabled = 0;
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static unsigned int symtab_sizes[SYM_NUM] = {
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2,
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32,
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16,
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512,
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128,
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16,
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16,
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16,
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};
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struct policydb_compat_info {
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int version;
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int sym_num;
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int ocon_num;
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};
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/* These need to be updated if SYM_NUM or OCON_NUM changes */
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static struct policydb_compat_info policydb_compat[] = {
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{
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.version = POLICYDB_VERSION_BASE,
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.sym_num = SYM_NUM - 3,
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.ocon_num = OCON_NUM - 1,
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},
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{
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.version = POLICYDB_VERSION_BOOL,
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.sym_num = SYM_NUM - 2,
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.ocon_num = OCON_NUM - 1,
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},
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{
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.version = POLICYDB_VERSION_IPV6,
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.sym_num = SYM_NUM - 2,
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.ocon_num = OCON_NUM,
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},
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{
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.version = POLICYDB_VERSION_NLCLASS,
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.sym_num = SYM_NUM - 2,
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.ocon_num = OCON_NUM,
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},
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{
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.version = POLICYDB_VERSION_MLS,
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.sym_num = SYM_NUM,
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.ocon_num = OCON_NUM,
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},
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{
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.version = POLICYDB_VERSION_AVTAB,
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.sym_num = SYM_NUM,
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.ocon_num = OCON_NUM,
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},
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{
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.version = POLICYDB_VERSION_RANGETRANS,
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.sym_num = SYM_NUM,
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.ocon_num = OCON_NUM,
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},
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};
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static struct policydb_compat_info *policydb_lookup_compat(int version)
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{
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int i;
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struct policydb_compat_info *info = NULL;
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for (i = 0; i < ARRAY_SIZE(policydb_compat); i++) {
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if (policydb_compat[i].version == version) {
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info = &policydb_compat[i];
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break;
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}
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}
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return info;
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}
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/*
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* Initialize the role table.
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*/
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static int roles_init(struct policydb *p)
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{
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char *key = NULL;
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int rc;
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struct role_datum *role;
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role = kzalloc(sizeof(*role), GFP_KERNEL);
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if (!role) {
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rc = -ENOMEM;
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goto out;
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}
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role->value = ++p->p_roles.nprim;
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if (role->value != OBJECT_R_VAL) {
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rc = -EINVAL;
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goto out_free_role;
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}
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key = kmalloc(strlen(OBJECT_R)+1,GFP_KERNEL);
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if (!key) {
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rc = -ENOMEM;
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goto out_free_role;
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}
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strcpy(key, OBJECT_R);
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rc = hashtab_insert(p->p_roles.table, key, role);
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if (rc)
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goto out_free_key;
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out:
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return rc;
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out_free_key:
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kfree(key);
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out_free_role:
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kfree(role);
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goto out;
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}
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/*
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* Initialize a policy database structure.
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*/
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static int policydb_init(struct policydb *p)
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{
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int i, rc;
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memset(p, 0, sizeof(*p));
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for (i = 0; i < SYM_NUM; i++) {
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rc = symtab_init(&p->symtab[i], symtab_sizes[i]);
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if (rc)
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goto out_free_symtab;
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}
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rc = avtab_init(&p->te_avtab);
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if (rc)
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goto out_free_symtab;
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rc = roles_init(p);
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if (rc)
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goto out_free_symtab;
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rc = cond_policydb_init(p);
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if (rc)
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goto out_free_symtab;
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out:
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return rc;
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out_free_symtab:
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for (i = 0; i < SYM_NUM; i++)
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hashtab_destroy(p->symtab[i].table);
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goto out;
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}
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/*
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* The following *_index functions are used to
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* define the val_to_name and val_to_struct arrays
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* in a policy database structure. The val_to_name
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* arrays are used when converting security context
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* structures into string representations. The
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* val_to_struct arrays are used when the attributes
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* of a class, role, or user are needed.
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*/
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static int common_index(void *key, void *datum, void *datap)
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{
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struct policydb *p;
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struct common_datum *comdatum;
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comdatum = datum;
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p = datap;
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if (!comdatum->value || comdatum->value > p->p_commons.nprim)
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return -EINVAL;
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p->p_common_val_to_name[comdatum->value - 1] = key;
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return 0;
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}
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static int class_index(void *key, void *datum, void *datap)
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{
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struct policydb *p;
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struct class_datum *cladatum;
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cladatum = datum;
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p = datap;
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if (!cladatum->value || cladatum->value > p->p_classes.nprim)
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return -EINVAL;
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p->p_class_val_to_name[cladatum->value - 1] = key;
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p->class_val_to_struct[cladatum->value - 1] = cladatum;
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return 0;
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}
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static int role_index(void *key, void *datum, void *datap)
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{
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struct policydb *p;
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struct role_datum *role;
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role = datum;
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p = datap;
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if (!role->value || role->value > p->p_roles.nprim)
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return -EINVAL;
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p->p_role_val_to_name[role->value - 1] = key;
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p->role_val_to_struct[role->value - 1] = role;
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return 0;
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}
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static int type_index(void *key, void *datum, void *datap)
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{
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struct policydb *p;
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struct type_datum *typdatum;
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typdatum = datum;
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p = datap;
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if (typdatum->primary) {
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if (!typdatum->value || typdatum->value > p->p_types.nprim)
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return -EINVAL;
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p->p_type_val_to_name[typdatum->value - 1] = key;
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}
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return 0;
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}
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static int user_index(void *key, void *datum, void *datap)
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{
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struct policydb *p;
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struct user_datum *usrdatum;
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usrdatum = datum;
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p = datap;
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if (!usrdatum->value || usrdatum->value > p->p_users.nprim)
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return -EINVAL;
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p->p_user_val_to_name[usrdatum->value - 1] = key;
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p->user_val_to_struct[usrdatum->value - 1] = usrdatum;
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return 0;
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}
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static int sens_index(void *key, void *datum, void *datap)
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{
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struct policydb *p;
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struct level_datum *levdatum;
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levdatum = datum;
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p = datap;
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if (!levdatum->isalias) {
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if (!levdatum->level->sens ||
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levdatum->level->sens > p->p_levels.nprim)
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return -EINVAL;
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p->p_sens_val_to_name[levdatum->level->sens - 1] = key;
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}
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return 0;
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}
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static int cat_index(void *key, void *datum, void *datap)
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{
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struct policydb *p;
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struct cat_datum *catdatum;
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catdatum = datum;
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p = datap;
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if (!catdatum->isalias) {
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if (!catdatum->value || catdatum->value > p->p_cats.nprim)
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return -EINVAL;
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p->p_cat_val_to_name[catdatum->value - 1] = key;
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}
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return 0;
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}
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static int (*index_f[SYM_NUM]) (void *key, void *datum, void *datap) =
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{
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common_index,
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class_index,
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role_index,
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type_index,
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user_index,
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cond_index_bool,
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sens_index,
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cat_index,
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};
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/*
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* Define the common val_to_name array and the class
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* val_to_name and val_to_struct arrays in a policy
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* database structure.
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*
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* Caller must clean up upon failure.
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*/
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static int policydb_index_classes(struct policydb *p)
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{
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int rc;
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p->p_common_val_to_name =
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kmalloc(p->p_commons.nprim * sizeof(char *), GFP_KERNEL);
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if (!p->p_common_val_to_name) {
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rc = -ENOMEM;
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goto out;
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}
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rc = hashtab_map(p->p_commons.table, common_index, p);
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if (rc)
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goto out;
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p->class_val_to_struct =
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kmalloc(p->p_classes.nprim * sizeof(*(p->class_val_to_struct)), GFP_KERNEL);
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if (!p->class_val_to_struct) {
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rc = -ENOMEM;
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goto out;
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}
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p->p_class_val_to_name =
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kmalloc(p->p_classes.nprim * sizeof(char *), GFP_KERNEL);
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if (!p->p_class_val_to_name) {
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rc = -ENOMEM;
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goto out;
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}
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rc = hashtab_map(p->p_classes.table, class_index, p);
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out:
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return rc;
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}
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#ifdef DEBUG_HASHES
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static void symtab_hash_eval(struct symtab *s)
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{
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int i;
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for (i = 0; i < SYM_NUM; i++) {
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struct hashtab *h = s[i].table;
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struct hashtab_info info;
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hashtab_stat(h, &info);
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printk(KERN_DEBUG "%s: %d entries and %d/%d buckets used, "
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"longest chain length %d\n", symtab_name[i], h->nel,
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info.slots_used, h->size, info.max_chain_len);
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}
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}
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#endif
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/*
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* Define the other val_to_name and val_to_struct arrays
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* in a policy database structure.
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*
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* Caller must clean up on failure.
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*/
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static int policydb_index_others(struct policydb *p)
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{
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int i, rc = 0;
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printk(KERN_DEBUG "security: %d users, %d roles, %d types, %d bools",
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p->p_users.nprim, p->p_roles.nprim, p->p_types.nprim, p->p_bools.nprim);
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if (selinux_mls_enabled)
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printk(", %d sens, %d cats", p->p_levels.nprim,
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p->p_cats.nprim);
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printk("\n");
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printk(KERN_DEBUG "security: %d classes, %d rules\n",
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p->p_classes.nprim, p->te_avtab.nel);
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#ifdef DEBUG_HASHES
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avtab_hash_eval(&p->te_avtab, "rules");
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symtab_hash_eval(p->symtab);
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#endif
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p->role_val_to_struct =
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kmalloc(p->p_roles.nprim * sizeof(*(p->role_val_to_struct)),
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GFP_KERNEL);
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if (!p->role_val_to_struct) {
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rc = -ENOMEM;
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goto out;
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}
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p->user_val_to_struct =
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kmalloc(p->p_users.nprim * sizeof(*(p->user_val_to_struct)),
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GFP_KERNEL);
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if (!p->user_val_to_struct) {
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rc = -ENOMEM;
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goto out;
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}
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if (cond_init_bool_indexes(p)) {
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rc = -ENOMEM;
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goto out;
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}
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for (i = SYM_ROLES; i < SYM_NUM; i++) {
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p->sym_val_to_name[i] =
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kmalloc(p->symtab[i].nprim * sizeof(char *), GFP_KERNEL);
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if (!p->sym_val_to_name[i]) {
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rc = -ENOMEM;
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goto out;
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}
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rc = hashtab_map(p->symtab[i].table, index_f[i], p);
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if (rc)
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goto out;
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}
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out:
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return rc;
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}
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|
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/*
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* The following *_destroy functions are used to
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* free any memory allocated for each kind of
|
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* symbol data in the policy database.
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*/
|
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static int perm_destroy(void *key, void *datum, void *p)
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{
|
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kfree(key);
|
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kfree(datum);
|
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return 0;
|
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}
|
|
|
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static int common_destroy(void *key, void *datum, void *p)
|
|
{
|
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struct common_datum *comdatum;
|
|
|
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kfree(key);
|
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comdatum = datum;
|
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hashtab_map(comdatum->permissions.table, perm_destroy, NULL);
|
|
hashtab_destroy(comdatum->permissions.table);
|
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kfree(datum);
|
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return 0;
|
|
}
|
|
|
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static int cls_destroy(void *key, void *datum, void *p)
|
|
{
|
|
struct class_datum *cladatum;
|
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struct constraint_node *constraint, *ctemp;
|
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struct constraint_expr *e, *etmp;
|
|
|
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kfree(key);
|
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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);
|
|
|
|
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);
|
|
|
|
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)
|
|
{
|
|
__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 "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)
|
|
{
|
|
__le32 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;
|
|
__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 "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:
|
|
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;
|
|
__le32 buf[2];
|
|
u32 len;
|
|
|
|
role = kzalloc(sizeof(*role), GFP_KERNEL);
|
|
if (!role) {
|
|
rc = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
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;
|
|
__le32 buf[3];
|
|
u32 len;
|
|
|
|
typdatum = kzalloc(sizeof(*typdatum),GFP_KERNEL);
|
|
if (!typdatum) {
|
|
rc = -ENOMEM;
|
|
return rc;
|
|
}
|
|
|
|
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)
|
|
{
|
|
__le32 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;
|
|
__le32 buf[2];
|
|
u32 len;
|
|
|
|
usrdatum = kzalloc(sizeof(*usrdatum), GFP_KERNEL);
|
|
if (!usrdatum) {
|
|
rc = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
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;
|
|
__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,
|
|
};
|
|
|
|
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[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 "security: 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 "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;
|
|
|
|
p->policyvers = le32_to_cpu(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",
|
|
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 "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;
|
|
}
|
|
}
|
|
p->reject_unknown = !!(le32_to_cpu(buf[1]) & REJECT_UNKNOWN);
|
|
p->allow_unknown = !!(le32_to_cpu(buf[1]) & ALLOW_UNKNOWN);
|
|
|
|
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 (le32_to_cpu(buf[2]) != info->sym_num ||
|
|
le32_to_cpu(buf[3]) != info->ocon_num) {
|
|
printk(KERN_ERR "security: 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->policyvers);
|
|
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]);
|
|
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]);
|
|
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(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 = 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 "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 = 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 "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) {
|
|
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;
|
|
rc = mls_read_range_helper(&rt->target_range, fp);
|
|
if (rc)
|
|
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 = 0;
|
|
out:
|
|
return rc;
|
|
bad_newc:
|
|
ocontext_destroy(newc,OCON_FSUSE);
|
|
bad:
|
|
if (!rc)
|
|
rc = -EINVAL;
|
|
policydb_destroy(p);
|
|
goto out;
|
|
}
|