1.\" Copyright (c) 2002, 2003 Networks Associates Technology, Inc. 2.\" All rights reserved. 3.\" 4.\" This software was developed for the FreeBSD Project by Chris Costello 5.\" at Safeport Network Services and Network Associates Laboratories, the 6.\" Security Research Division of Network Associates, Inc. under 7.\" DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the 8.\" DARPA CHATS research program. 9.\" 10.\" Redistribution and use in source and binary forms, with or without 11.\" modification, are permitted provided that the following conditions 12.\" are met: 13.\" 1. Redistributions of source code must retain the above copyright 14.\" notice, this list of conditions and the following disclaimer. 15.\" 2. Redistributions in binary form must reproduce the above copyright 16.\" notice, this list of conditions and the following disclaimer in the 17.\" documentation and/or other materials provided with the distribution. 18.\" 19.\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 20.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 23.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29.\" SUCH DAMAGE. 30.\" 31.Dd July 25, 2015 32.Dt MAC_NONE 4 33.Os 34.Sh NAME 35.Nm mac_none 36.Nd "null MAC policy module" 37.Sh SYNOPSIS 38To compile the null policy 39into your kernel, place the following lines in your kernel 40configuration file: 41.Bd -ragged -offset indent 42.Cd "options MAC" 43.Cd "options MAC_NONE" 44.Ed 45.Pp 46Alternately, to load the none module at boot time, place the following line 47in your kernel configuration file: 48.Bd -ragged -offset indent 49.Cd "options MAC" 50.Ed 51.Pp 52and in 53.Xr loader.conf 5 : 54.Bd -literal -offset indent 55mac_none_load="YES" 56.Ed 57.Sh DESCRIPTION 58The 59.Nm 60policy module implements a none MAC policy that has no effect on 61access control in the system. 62Unlike 63.Xr mac_stub 4 , 64none of the MAC entry points are defined. 65.Ss Label Format 66No labels are defined for 67.Nm . 68.Sh SEE ALSO 69.Xr mac 4 , 70.Xr mac_biba 4 , 71.Xr mac_bsdextended 4 , 72.Xr mac_ddb 4 , 73.Xr mac_ifoff 4 , 74.Xr mac_lomac 4 , 75.Xr mac_mls 4 , 76.Xr mac_partition 4 , 77.Xr mac_portacl 4 , 78.Xr mac_seeotheruids 4 , 79.Xr mac_stub 4 , 80.Xr mac_test 4 , 81.Xr mac 9 82.Sh HISTORY 83The 84.Nm 85policy module first appeared in 86.Fx 5.0 87and was developed by the 88.Tn TrustedBSD 89Project. 90.Sh AUTHORS 91This software was contributed to the 92.Fx 93Project by Network Associates Labs, 94the Security Research Division of Network Associates 95Inc. 96under DARPA/SPAWAR contract N66001-01-C-8035 97.Pq Dq CBOSS , 98as part of the DARPA CHATS research program. 99.Sh BUGS 100While the MAC Framework design is intended to support the containment of 101the root user, not all attack channels are currently protected by entry 102point checks. 103As such, MAC Framework policies should not be relied on, in isolation, 104to protect against a malicious privileged user. 105