1/*-
2 * Copyright (c) 2002-2003 Networks Associates Technology, Inc.
3 * Copyright (c) 2006 SPARTA, Inc.
4 * Copyright (c) 2007, 2009 Robert N. M. Watson
5 * All rights reserved.
6 *
7 * This software was developed for the FreeBSD Project in part by Network
8 * Associates Laboratories, the Security Research Division of Network
9 * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"),
10 * as part of the DARPA CHATS research program.
11 *
12 * Portions of this software were developed by Robert Watson for the
13 * TrustedBSD Project.
14 *
15 * This software was enhanced by SPARTA ISSO under SPAWAR contract
16 * N66001-04-C-6019 ("SEFOS").
17 *
18 * This software was developed at the University of Cambridge Computer
19 * Laboratory with support from a grant from Google, Inc.
20 *
21 * Redistribution and use in source and binary forms, with or without
22 * modification, are permitted provided that the following conditions
23 * are met:
24 * 1. Redistributions of source code must retain the above copyright
25 * notice, this list of conditions and the following disclaimer.
26 * 2. Redistributions in binary form must reproduce the above copyright
27 * notice, this list of conditions and the following disclaimer in the
28 * documentation and/or other materials provided with the distribution.
29 *
30 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
40 * SUCH DAMAGE.
41 */
42
43/*
44 * MAC Framework entry points relating to overall operation of system,
45 * including global services such as the kernel environment and loadable
46 * modules.
47 *
48 * System checks often align with existing privilege checks, but provide
49 * additional security context that may be relevant to policies, such as the
50 * specific object being operated on.
51 */
52
53#include <sys/cdefs.h>
| 1/*-
2 * Copyright (c) 2002-2003 Networks Associates Technology, Inc.
3 * Copyright (c) 2006 SPARTA, Inc.
4 * Copyright (c) 2007, 2009 Robert N. M. Watson
5 * All rights reserved.
6 *
7 * This software was developed for the FreeBSD Project in part by Network
8 * Associates Laboratories, the Security Research Division of Network
9 * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"),
10 * as part of the DARPA CHATS research program.
11 *
12 * Portions of this software were developed by Robert Watson for the
13 * TrustedBSD Project.
14 *
15 * This software was enhanced by SPARTA ISSO under SPAWAR contract
16 * N66001-04-C-6019 ("SEFOS").
17 *
18 * This software was developed at the University of Cambridge Computer
19 * Laboratory with support from a grant from Google, Inc.
20 *
21 * Redistribution and use in source and binary forms, with or without
22 * modification, are permitted provided that the following conditions
23 * are met:
24 * 1. Redistributions of source code must retain the above copyright
25 * notice, this list of conditions and the following disclaimer.
26 * 2. Redistributions in binary form must reproduce the above copyright
27 * notice, this list of conditions and the following disclaimer in the
28 * documentation and/or other materials provided with the distribution.
29 *
30 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
40 * SUCH DAMAGE.
41 */
42
43/*
44 * MAC Framework entry points relating to overall operation of system,
45 * including global services such as the kernel environment and loadable
46 * modules.
47 *
48 * System checks often align with existing privilege checks, but provide
49 * additional security context that may be relevant to policies, such as the
50 * specific object being operated on.
51 */
52
53#include <sys/cdefs.h>
|
54__FBSDID("$FreeBSD: head/sys/security/mac/mac_system.c 189797 2009-03-14 16:06:06Z rwatson $");
| 54__FBSDID("$FreeBSD: head/sys/security/mac/mac_system.c 191731 2009-05-01 21:05:40Z rwatson $");
|
55
56#include "opt_kdtrace.h"
57#include "opt_mac.h"
58
59#include <sys/param.h>
60#include <sys/kernel.h>
61#include <sys/lock.h>
62#include <sys/malloc.h>
63#include <sys/module.h>
64#include <sys/mutex.h>
65#include <sys/sdt.h>
66#include <sys/systm.h>
67#include <sys/vnode.h>
68#include <sys/sysctl.h>
69
70#include <security/mac/mac_framework.h>
71#include <security/mac/mac_internal.h>
72#include <security/mac/mac_policy.h>
73
74MAC_CHECK_PROBE_DEFINE1(kenv_check_dump, "struct ucred *");
75
76int
77mac_kenv_check_dump(struct ucred *cred)
78{
79 int error;
80
| 55
56#include "opt_kdtrace.h"
57#include "opt_mac.h"
58
59#include <sys/param.h>
60#include <sys/kernel.h>
61#include <sys/lock.h>
62#include <sys/malloc.h>
63#include <sys/module.h>
64#include <sys/mutex.h>
65#include <sys/sdt.h>
66#include <sys/systm.h>
67#include <sys/vnode.h>
68#include <sys/sysctl.h>
69
70#include <security/mac/mac_framework.h>
71#include <security/mac/mac_internal.h>
72#include <security/mac/mac_policy.h>
73
74MAC_CHECK_PROBE_DEFINE1(kenv_check_dump, "struct ucred *");
75
76int
77mac_kenv_check_dump(struct ucred *cred)
78{
79 int error;
80
|
81 MAC_CHECK_NOSLEEP(kenv_check_dump, cred);
| 81 MAC_POLICY_CHECK_NOSLEEP(kenv_check_dump, cred);
|
82 MAC_CHECK_PROBE1(kenv_check_dump, error, cred);
83
84 return (error);
85}
86
87MAC_CHECK_PROBE_DEFINE2(kenv_check_get, "struct ucred *", "char *");
88
89int
90mac_kenv_check_get(struct ucred *cred, char *name)
91{
92 int error;
93
| 82 MAC_CHECK_PROBE1(kenv_check_dump, error, cred);
83
84 return (error);
85}
86
87MAC_CHECK_PROBE_DEFINE2(kenv_check_get, "struct ucred *", "char *");
88
89int
90mac_kenv_check_get(struct ucred *cred, char *name)
91{
92 int error;
93
|
94 MAC_CHECK_NOSLEEP(kenv_check_get, cred, name);
| 94 MAC_POLICY_CHECK_NOSLEEP(kenv_check_get, cred, name);
|
95 MAC_CHECK_PROBE2(kenv_check_get, error, cred, name);
96
97 return (error);
98}
99
100MAC_CHECK_PROBE_DEFINE3(kenv_check_set, "struct ucred *", "char *",
101 "char *");
102
103int
104mac_kenv_check_set(struct ucred *cred, char *name, char *value)
105{
106 int error;
107
| 95 MAC_CHECK_PROBE2(kenv_check_get, error, cred, name);
96
97 return (error);
98}
99
100MAC_CHECK_PROBE_DEFINE3(kenv_check_set, "struct ucred *", "char *",
101 "char *");
102
103int
104mac_kenv_check_set(struct ucred *cred, char *name, char *value)
105{
106 int error;
107
|
108 MAC_CHECK_NOSLEEP(kenv_check_set, cred, name, value);
| 108 MAC_POLICY_CHECK_NOSLEEP(kenv_check_set, cred, name, value);
|
109 MAC_CHECK_PROBE3(kenv_check_set, error, cred, name, value);
110
111 return (error);
112}
113
114MAC_CHECK_PROBE_DEFINE2(kenv_check_unset, "struct ucred *", "char *");
115
116int
117mac_kenv_check_unset(struct ucred *cred, char *name)
118{
119 int error;
120
| 109 MAC_CHECK_PROBE3(kenv_check_set, error, cred, name, value);
110
111 return (error);
112}
113
114MAC_CHECK_PROBE_DEFINE2(kenv_check_unset, "struct ucred *", "char *");
115
116int
117mac_kenv_check_unset(struct ucred *cred, char *name)
118{
119 int error;
120
|
121 MAC_CHECK_NOSLEEP(kenv_check_unset, cred, name);
| 121 MAC_POLICY_CHECK_NOSLEEP(kenv_check_unset, cred, name);
|
122 MAC_CHECK_PROBE2(kenv_check_unset, error, cred, name);
123
124 return (error);
125}
126
127MAC_CHECK_PROBE_DEFINE2(kld_check_load, "struct ucred *", "struct vnode *");
128
129int
130mac_kld_check_load(struct ucred *cred, struct vnode *vp)
131{
132 int error;
133
134 ASSERT_VOP_LOCKED(vp, "mac_kld_check_load");
135
| 122 MAC_CHECK_PROBE2(kenv_check_unset, error, cred, name);
123
124 return (error);
125}
126
127MAC_CHECK_PROBE_DEFINE2(kld_check_load, "struct ucred *", "struct vnode *");
128
129int
130mac_kld_check_load(struct ucred *cred, struct vnode *vp)
131{
132 int error;
133
134 ASSERT_VOP_LOCKED(vp, "mac_kld_check_load");
135
|
136 MAC_CHECK(kld_check_load, cred, vp, vp->v_label);
| 136 MAC_POLICY_CHECK(kld_check_load, cred, vp, vp->v_label);
|
137 MAC_CHECK_PROBE2(kld_check_load, error, cred, vp);
138
139 return (error);
140}
141
142MAC_CHECK_PROBE_DEFINE1(kld_check_stat, "struct ucred *");
143
144int
145mac_kld_check_stat(struct ucred *cred)
146{
147 int error;
148
| 137 MAC_CHECK_PROBE2(kld_check_load, error, cred, vp);
138
139 return (error);
140}
141
142MAC_CHECK_PROBE_DEFINE1(kld_check_stat, "struct ucred *");
143
144int
145mac_kld_check_stat(struct ucred *cred)
146{
147 int error;
148
|
149 MAC_CHECK_NOSLEEP(kld_check_stat, cred);
| 149 MAC_POLICY_CHECK_NOSLEEP(kld_check_stat, cred);
|
150 MAC_CHECK_PROBE1(kld_check_stat, error, cred);
151
152 return (error);
153}
154
155MAC_CHECK_PROBE_DEFINE2(system_check_acct, "struct ucred *",
156 "struct vnode *");
157
158int
159mac_system_check_acct(struct ucred *cred, struct vnode *vp)
160{
161 int error;
162
163 if (vp != NULL) {
164 ASSERT_VOP_LOCKED(vp, "mac_system_check_acct");
165 }
166
| 150 MAC_CHECK_PROBE1(kld_check_stat, error, cred);
151
152 return (error);
153}
154
155MAC_CHECK_PROBE_DEFINE2(system_check_acct, "struct ucred *",
156 "struct vnode *");
157
158int
159mac_system_check_acct(struct ucred *cred, struct vnode *vp)
160{
161 int error;
162
163 if (vp != NULL) {
164 ASSERT_VOP_LOCKED(vp, "mac_system_check_acct");
165 }
166
|
167 MAC_CHECK(system_check_acct, cred, vp,
| 167 MAC_POLICY_CHECK(system_check_acct, cred, vp,
|
168 vp != NULL ? vp->v_label : NULL);
169 MAC_CHECK_PROBE2(system_check_acct, error, cred, vp);
170
171 return (error);
172}
173
174MAC_CHECK_PROBE_DEFINE2(system_check_reboot, "struct ucred *", "int");
175
176int
177mac_system_check_reboot(struct ucred *cred, int howto)
178{
179 int error;
180
| 168 vp != NULL ? vp->v_label : NULL);
169 MAC_CHECK_PROBE2(system_check_acct, error, cred, vp);
170
171 return (error);
172}
173
174MAC_CHECK_PROBE_DEFINE2(system_check_reboot, "struct ucred *", "int");
175
176int
177mac_system_check_reboot(struct ucred *cred, int howto)
178{
179 int error;
180
|
181 MAC_CHECK_NOSLEEP(system_check_reboot, cred, howto);
| 181 MAC_POLICY_CHECK_NOSLEEP(system_check_reboot, cred, howto);
|
182 MAC_CHECK_PROBE2(system_check_reboot, error, cred, howto);
183
184 return (error);
185}
186
187MAC_CHECK_PROBE_DEFINE2(system_check_swapon, "struct ucred *",
188 "struct vnode *");
189
190int
191mac_system_check_swapon(struct ucred *cred, struct vnode *vp)
192{
193 int error;
194
195 ASSERT_VOP_LOCKED(vp, "mac_system_check_swapon");
196
| 182 MAC_CHECK_PROBE2(system_check_reboot, error, cred, howto);
183
184 return (error);
185}
186
187MAC_CHECK_PROBE_DEFINE2(system_check_swapon, "struct ucred *",
188 "struct vnode *");
189
190int
191mac_system_check_swapon(struct ucred *cred, struct vnode *vp)
192{
193 int error;
194
195 ASSERT_VOP_LOCKED(vp, "mac_system_check_swapon");
196
|
197 MAC_CHECK(system_check_swapon, cred, vp, vp->v_label);
| 197 MAC_POLICY_CHECK(system_check_swapon, cred, vp, vp->v_label);
|
198 MAC_CHECK_PROBE2(system_check_swapon, error, cred, vp);
199
200 return (error);
201}
202
203MAC_CHECK_PROBE_DEFINE2(system_check_swapoff, "struct ucred *",
204 "struct vnode *");
205
206int
207mac_system_check_swapoff(struct ucred *cred, struct vnode *vp)
208{
209 int error;
210
211 ASSERT_VOP_LOCKED(vp, "mac_system_check_swapoff");
212
| 198 MAC_CHECK_PROBE2(system_check_swapon, error, cred, vp);
199
200 return (error);
201}
202
203MAC_CHECK_PROBE_DEFINE2(system_check_swapoff, "struct ucred *",
204 "struct vnode *");
205
206int
207mac_system_check_swapoff(struct ucred *cred, struct vnode *vp)
208{
209 int error;
210
211 ASSERT_VOP_LOCKED(vp, "mac_system_check_swapoff");
212
|
213 MAC_CHECK(system_check_swapoff, cred, vp, vp->v_label);
| 213 MAC_POLICY_CHECK(system_check_swapoff, cred, vp, vp->v_label);
|
214 MAC_CHECK_PROBE2(system_check_swapoff, error, cred, vp);
215
216 return (error);
217}
218
219MAC_CHECK_PROBE_DEFINE3(system_check_sysctl, "struct ucred *",
220 "struct sysctl_oid *", "struct sysctl_req *");
221
222int
223mac_system_check_sysctl(struct ucred *cred, struct sysctl_oid *oidp,
224 void *arg1, int arg2, struct sysctl_req *req)
225{
226 int error;
227
228 /*
229 * XXXMAC: We would very much like to assert the SYSCTL_LOCK here,
230 * but since it's not exported from kern_sysctl.c, we can't.
231 */
| 214 MAC_CHECK_PROBE2(system_check_swapoff, error, cred, vp);
215
216 return (error);
217}
218
219MAC_CHECK_PROBE_DEFINE3(system_check_sysctl, "struct ucred *",
220 "struct sysctl_oid *", "struct sysctl_req *");
221
222int
223mac_system_check_sysctl(struct ucred *cred, struct sysctl_oid *oidp,
224 void *arg1, int arg2, struct sysctl_req *req)
225{
226 int error;
227
228 /*
229 * XXXMAC: We would very much like to assert the SYSCTL_LOCK here,
230 * but since it's not exported from kern_sysctl.c, we can't.
231 */
|
232 MAC_CHECK_NOSLEEP(system_check_sysctl, cred, oidp, arg1, arg2, req);
| 232 MAC_POLICY_CHECK_NOSLEEP(system_check_sysctl, cred, oidp, arg1, arg2,
233 req);
|
233 MAC_CHECK_PROBE3(system_check_sysctl, error, cred, oidp, req);
234
235 return (error);
236}
| 234 MAC_CHECK_PROBE3(system_check_sysctl, error, cred, oidp, req);
235
236 return (error);
237}
|