/*- * 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 __FBSDID("$FreeBSD$"); #include "opt_kdtrace.h" #include "opt_mac.h" #include #include #include #include #include #include #include #include #include #include #include #include #include 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); }