mac_system.c revision 166531 
1/*-
2 * Copyright (c) 2002, 2003 Networks Associates Technology, Inc.
3 * All rights reserved.
4 *
5 * This software was developed for the FreeBSD Project in part by Network
6 * Associates Laboratories, the Security Research Division of Network
7 * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"),
8 * as part of the 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 AUTHOR 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 AUTHOR 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
32#include <sys/cdefs.h>
33__FBSDID("$FreeBSD: head/sys/security/mac/mac_system.c 166531 2007-02-06 10:59:23Z rwatson $");
34
35#include "opt_mac.h"
36
37#include <sys/param.h>
38#include <sys/kernel.h>
39#include <sys/lock.h>
40#include <sys/malloc.h>
41#include <sys/module.h>
42#include <sys/mutex.h>
43#include <sys/systm.h>
44#include <sys/vnode.h>
45#include <sys/sysctl.h>
46
47#include <security/mac/mac_framework.h>
48#include <security/mac/mac_internal.h>
49#include <security/mac/mac_policy.h>
50
51/*
52 * XXXRW: Some of these checks now duplicate privilege checks.  However,
53 * others provide additional security context that may be useful to policies.
54 * We need to review these and remove ones that are pure duplicates.
55 */
56
57int
58mac_check_kenv_dump(struct ucred *cred)
59{
60	int error;
61
62	MAC_CHECK(check_kenv_dump, cred);
63
64	return (error);
65}
66
67int
68mac_check_kenv_get(struct ucred *cred, char *name)
69{
70	int error;
71
72	MAC_CHECK(check_kenv_get, cred, name);
73
74	return (error);
75}
76
77int
78mac_check_kenv_set(struct ucred *cred, char *name, char *value)
79{
80	int error;
81
82	MAC_CHECK(check_kenv_set, cred, name, value);
83
84	return (error);
85}
86
87int
88mac_check_kenv_unset(struct ucred *cred, char *name)
89{
90	int error;
91
92	MAC_CHECK(check_kenv_unset, cred, name);
93
94	return (error);
95}
96
97int
98mac_check_kld_load(struct ucred *cred, struct vnode *vp)
99{
100	int error;
101
102	ASSERT_VOP_LOCKED(vp, "mac_check_kld_load");
103
104	MAC_CHECK(check_kld_load, cred, vp, vp->v_label);
105
106	return (error);
107}
108
109int
110mac_check_kld_stat(struct ucred *cred)
111{
112	int error;
113
114	MAC_CHECK(check_kld_stat, cred);
115
116	return (error);
117}
118
119int
120mac_check_kld_unload(struct ucred *cred)
121{
122	int error;
123
124	MAC_CHECK(check_kld_unload, cred);
125
126	return (error);
127}
128
129int
130mac_check_sysarch_ioperm(struct ucred *cred)
131{
132	int error;
133
134	MAC_CHECK(check_sysarch_ioperm, cred);
135	return (error);
136}
137
138int
139mac_check_system_acct(struct ucred *cred, struct vnode *vp)
140{
141	int error;
142
143	if (vp != NULL) {
144		ASSERT_VOP_LOCKED(vp, "mac_check_system_acct");
145	}
146
147	MAC_CHECK(check_system_acct, cred, vp,
148	    vp != NULL ? vp->v_label : NULL);
149
150	return (error);
151}
152
153int
154mac_check_system_nfsd(struct ucred *cred)
155{
156	int error;
157
158	MAC_CHECK(check_system_nfsd, cred);
159
160	return (error);
161}
162
163int
164mac_check_system_reboot(struct ucred *cred, int howto)
165{
166	int error;
167
168	MAC_CHECK(check_system_reboot, cred, howto);
169
170	return (error);
171}
172
173int
174mac_check_system_settime(struct ucred *cred)
175{
176	int error;
177
178	MAC_CHECK(check_system_settime, cred);
179
180	return (error);
181}
182
183int
184mac_check_system_swapon(struct ucred *cred, struct vnode *vp)
185{
186	int error;
187
188	ASSERT_VOP_LOCKED(vp, "mac_check_system_swapon");
189
190	MAC_CHECK(check_system_swapon, cred, vp, vp->v_label);
191	return (error);
192}
193
194int
195mac_check_system_swapoff(struct ucred *cred, struct vnode *vp)
196{
197	int error;
198
199	ASSERT_VOP_LOCKED(vp, "mac_check_system_swapoff");
200
201	MAC_CHECK(check_system_swapoff, cred, vp, vp->v_label);
202	return (error);
203}
204
205int
206mac_check_system_sysctl(struct ucred *cred, struct sysctl_oid *oidp, void *arg1,
207    int arg2, struct sysctl_req *req)
208{
209	int error;
210
211	/*
212	 * XXXMAC: We would very much like to assert the SYSCTL_LOCK here,
213	 * but since it's not exported from kern_sysctl.c, we can't.
214	 */
215	MAC_CHECK(check_system_sysctl, cred, oidp, arg1, arg2, req);
216
217	return (error);
218}
219