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- /*-
- * Copyright (c) 2002-2003 Networks Associates Technology, Inc.
- * Copyright (c) 2006 SPARTA, Inc.
- * Copyright (c) 2007, 2009 Robert N. M. Watson
- * All rights reserved.
- *
- * This software was developed for the FreeBSD Project in part by Network
- * Associates Laboratories, the Security Research Division of Network
- * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"),
- * as part of the DARPA CHATS research program.
- *
- * Portions of this software were developed by Robert Watson for the
- * TrustedBSD Project.
- *
- * This software was enhanced by SPARTA ISSO under SPAWAR contract
- * N66001-04-C-6019 ("SEFOS").
- *
- * This software was developed at the University of Cambridge Computer
- * Laboratory with support from a grant from Google, Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
- /*
- * MAC Framework entry points relating to overall operation of system,
- * including global services such as the kernel environment and loadable
- * modules.
- *
- * System checks often align with existing privilege checks, but provide
- * additional security context that may be relevant to policies, such as the
- * specific object being operated on.
- */
- #include <sys/cdefs.h>
- #include "opt_mac.h"
- #include <sys/param.h>
- #include <sys/kernel.h>
- #include <sys/lock.h>
- #include <sys/malloc.h>
- #include <sys/module.h>
- #include <sys/mutex.h>
- #include <sys/sdt.h>
- #include <sys/systm.h>
- #include <sys/vnode.h>
- #include <sys/sysctl.h>
- #include <security/mac/mac_framework.h>
- #include <security/mac/mac_internal.h>
- #include <security/mac/mac_policy.h>
- MAC_CHECK_PROBE_DEFINE1(kenv_check_dump, "struct ucred *");
- int
- mac_kenv_check_dump(struct ucred *cred)
- {
- int error;
- MAC_POLICY_CHECK_NOSLEEP(kenv_check_dump, cred);
- MAC_CHECK_PROBE1(kenv_check_dump, error, cred);
- return (error);
- }
- MAC_CHECK_PROBE_DEFINE2(kenv_check_get, "struct ucred *", "char *");
- int
- mac_kenv_check_get(struct ucred *cred, char *name)
- {
- int error;
- MAC_POLICY_CHECK_NOSLEEP(kenv_check_get, cred, name);
- MAC_CHECK_PROBE2(kenv_check_get, error, cred, name);
- return (error);
- }
- MAC_CHECK_PROBE_DEFINE3(kenv_check_set, "struct ucred *", "char *",
- "char *");
- int
- mac_kenv_check_set(struct ucred *cred, char *name, char *value)
- {
- int error;
- MAC_POLICY_CHECK_NOSLEEP(kenv_check_set, cred, name, value);
- MAC_CHECK_PROBE3(kenv_check_set, error, cred, name, value);
- return (error);
- }
- MAC_CHECK_PROBE_DEFINE2(kenv_check_unset, "struct ucred *", "char *");
- int
- mac_kenv_check_unset(struct ucred *cred, char *name)
- {
- int error;
- MAC_POLICY_CHECK_NOSLEEP(kenv_check_unset, cred, name);
- MAC_CHECK_PROBE2(kenv_check_unset, error, cred, name);
- return (error);
- }
- MAC_CHECK_PROBE_DEFINE2(kld_check_load, "struct ucred *", "struct vnode *");
- int
- mac_kld_check_load(struct ucred *cred, struct vnode *vp)
- {
- int error;
- ASSERT_VOP_LOCKED(vp, "mac_kld_check_load");
- MAC_POLICY_CHECK(kld_check_load, cred, vp, vp->v_label);
- MAC_CHECK_PROBE2(kld_check_load, error, cred, vp);
- return (error);
- }
- MAC_CHECK_PROBE_DEFINE1(kld_check_stat, "struct ucred *");
- int
- mac_kld_check_stat(struct ucred *cred)
- {
- int error;
- MAC_POLICY_CHECK_NOSLEEP(kld_check_stat, cred);
- MAC_CHECK_PROBE1(kld_check_stat, error, cred);
- return (error);
- }
- MAC_CHECK_PROBE_DEFINE2(system_check_acct, "struct ucred *",
- "struct vnode *");
- int
- mac_system_check_acct(struct ucred *cred, struct vnode *vp)
- {
- int error;
- if (vp != NULL) {
- ASSERT_VOP_LOCKED(vp, "mac_system_check_acct");
- }
- MAC_POLICY_CHECK(system_check_acct, cred, vp,
- vp != NULL ? vp->v_label : NULL);
- MAC_CHECK_PROBE2(system_check_acct, error, cred, vp);
- return (error);
- }
- MAC_CHECK_PROBE_DEFINE2(system_check_reboot, "struct ucred *", "int");
- int
- mac_system_check_reboot(struct ucred *cred, int howto)
- {
- int error;
- MAC_POLICY_CHECK_NOSLEEP(system_check_reboot, cred, howto);
- MAC_CHECK_PROBE2(system_check_reboot, error, cred, howto);
- return (error);
- }
- MAC_CHECK_PROBE_DEFINE2(system_check_swapon, "struct ucred *",
- "struct vnode *");
- int
- mac_system_check_swapon(struct ucred *cred, struct vnode *vp)
- {
- int error;
- ASSERT_VOP_LOCKED(vp, "mac_system_check_swapon");
- MAC_POLICY_CHECK(system_check_swapon, cred, vp, vp->v_label);
- MAC_CHECK_PROBE2(system_check_swapon, error, cred, vp);
- return (error);
- }
- MAC_CHECK_PROBE_DEFINE2(system_check_swapoff, "struct ucred *",
- "struct vnode *");
- int
- mac_system_check_swapoff(struct ucred *cred, struct vnode *vp)
- {
- int error;
- ASSERT_VOP_LOCKED(vp, "mac_system_check_swapoff");
- MAC_POLICY_CHECK(system_check_swapoff, cred, vp, vp->v_label);
- MAC_CHECK_PROBE2(system_check_swapoff, error, cred, vp);
- return (error);
- }
- MAC_CHECK_PROBE_DEFINE3(system_check_sysctl, "struct ucred *",
- "struct sysctl_oid *", "struct sysctl_req *");
- int
- mac_system_check_sysctl(struct ucred *cred, struct sysctl_oid *oidp,
- void *arg1, int arg2, struct sysctl_req *req)
- {
- int error;
- /*
- * XXXMAC: We would very much like to assert the SYSCTL_LOCK here,
- * but since it's not exported from kern_sysctl.c, we can't.
- */
- MAC_POLICY_CHECK_NOSLEEP(system_check_sysctl, cred, oidp, arg1, arg2,
- req);
- MAC_CHECK_PROBE3(system_check_sysctl, error, cred, oidp, req);
- return (error);
- }
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