1/*-
2 * Copyright (c) 2003-2004 Networks Associates Technology, Inc.
3 * Copyright (c) 2006 SPARTA, Inc.
4 * Copyright (c) 2008 Apple Inc.
5 * Copyright (c) 2009 Robert N. M. Watson
6 * All rights reserved.
7 *
8 * This software was developed for the FreeBSD Project in part by Network
9 * Associates Laboratories, the Security Research Division of Network
10 * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"),
11 * as part of the DARPA CHATS research program.
12 *
13 * This software was enhanced by SPARTA ISSO under SPAWAR contract
14 * N66001-04-C-6019 ("SEFOS").
15 *
16 * This software was developed at the University of Cambridge Computer
17 * Laboratory with support from a grant from Google, Inc.
18 *
19 * Redistribution and use in source and binary forms, with or without
20 * modification, are permitted provided that the following conditions
21 * are met:
22 * 1. Redistributions of source code must retain the above copyright
23 *    notice, this list of conditions and the following disclaimer.
24 * 2. Redistributions in binary form must reproduce the above copyright
25 *    notice, this list of conditions and the following disclaimer in the
26 *    documentation and/or other materials provided with the distribution.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * SUCH DAMAGE.
39 */
40
41#include <sys/cdefs.h>
42#include "opt_mac.h"
43
44#include <sys/param.h>
45#include <sys/kernel.h>
46#include <sys/lock.h>
47#include <sys/malloc.h>
48#include <sys/mutex.h>
49#include <sys/sbuf.h>
50#include <sys/sdt.h>
51#include <sys/systm.h>
52#include <sys/vnode.h>
53#include <sys/mount.h>
54#include <sys/file.h>
55#include <sys/namei.h>
56#include <sys/sysctl.h>
57#include <sys/msg.h>
58
59#include <security/mac/mac_framework.h>
60#include <security/mac/mac_internal.h>
61#include <security/mac/mac_policy.h>
62
63static struct label *
64mac_sysv_msgmsg_label_alloc(void)
65{
66	struct label *label;
67
68	label = mac_labelzone_alloc(M_WAITOK);
69	MAC_POLICY_PERFORM(sysvmsg_init_label, label);
70	return (label);
71}
72
73void
74mac_sysvmsg_init(struct msg *msgptr)
75{
76
77	if (mac_labeled & MPC_OBJECT_SYSVMSG)
78		msgptr->label = mac_sysv_msgmsg_label_alloc();
79	else
80		msgptr->label = NULL;
81}
82
83static struct label *
84mac_sysv_msgqueue_label_alloc(void)
85{
86	struct label *label;
87
88	label = mac_labelzone_alloc(M_WAITOK);
89	MAC_POLICY_PERFORM(sysvmsq_init_label, label);
90	return (label);
91}
92
93void
94mac_sysvmsq_init(struct msqid_kernel *msqkptr)
95{
96
97	if (mac_labeled & MPC_OBJECT_SYSVMSQ)
98		msqkptr->label = mac_sysv_msgqueue_label_alloc();
99	else
100		msqkptr->label = NULL;
101}
102
103static void
104mac_sysv_msgmsg_label_free(struct label *label)
105{
106
107	MAC_POLICY_PERFORM_NOSLEEP(sysvmsg_destroy_label, label);
108	mac_labelzone_free(label);
109}
110
111void
112mac_sysvmsg_destroy(struct msg *msgptr)
113{
114
115	if (msgptr->label != NULL) {
116		mac_sysv_msgmsg_label_free(msgptr->label);
117		msgptr->label = NULL;
118	}
119}
120
121static void
122mac_sysv_msgqueue_label_free(struct label *label)
123{
124
125	MAC_POLICY_PERFORM_NOSLEEP(sysvmsq_destroy_label, label);
126	mac_labelzone_free(label);
127}
128
129void
130mac_sysvmsq_destroy(struct msqid_kernel *msqkptr)
131{
132
133	if (msqkptr->label != NULL) {
134		mac_sysv_msgqueue_label_free(msqkptr->label);
135		msqkptr->label = NULL;
136	}
137}
138
139void
140mac_sysvmsg_create(struct ucred *cred, struct msqid_kernel *msqkptr,
141    struct msg *msgptr)
142{
143
144	MAC_POLICY_PERFORM_NOSLEEP(sysvmsg_create, cred, msqkptr,
145	    msqkptr->label, msgptr, msgptr->label);
146}
147
148void
149mac_sysvmsq_create(struct ucred *cred, struct msqid_kernel *msqkptr)
150{
151
152	MAC_POLICY_PERFORM_NOSLEEP(sysvmsq_create, cred, msqkptr,
153	    msqkptr->label);
154}
155
156void
157mac_sysvmsg_cleanup(struct msg *msgptr)
158{
159
160	MAC_POLICY_PERFORM_NOSLEEP(sysvmsg_cleanup, msgptr->label);
161}
162
163void
164mac_sysvmsq_cleanup(struct msqid_kernel *msqkptr)
165{
166
167	MAC_POLICY_PERFORM_NOSLEEP(sysvmsq_cleanup, msqkptr->label);
168}
169
170MAC_CHECK_PROBE_DEFINE3(sysvmsq_check_msgmsq, "struct ucred *",
171    "struct msg *", "struct msqid_kernel *");
172
173int
174mac_sysvmsq_check_msgmsq(struct ucred *cred, struct msg *msgptr,
175	struct msqid_kernel *msqkptr)
176{
177	int error;
178
179	MAC_POLICY_CHECK_NOSLEEP(sysvmsq_check_msgmsq, cred, msgptr,
180	    msgptr->label, msqkptr, msqkptr->label);
181	MAC_CHECK_PROBE3(sysvmsq_check_msgmsq, error, cred, msgptr, msqkptr);
182
183	return (error);
184}
185
186MAC_CHECK_PROBE_DEFINE2(sysvmsq_check_msgrcv, "struct ucred *",
187    "struct msg *");
188
189int
190mac_sysvmsq_check_msgrcv(struct ucred *cred, struct msg *msgptr)
191{
192	int error;
193
194	MAC_POLICY_CHECK_NOSLEEP(sysvmsq_check_msgrcv, cred, msgptr,
195	    msgptr->label);
196	MAC_CHECK_PROBE2(sysvmsq_check_msgrcv, error, cred, msgptr);
197
198	return (error);
199}
200
201MAC_CHECK_PROBE_DEFINE2(sysvmsq_check_msgrmid, "struct ucred *",
202    "struct msg *");
203
204int
205mac_sysvmsq_check_msgrmid(struct ucred *cred, struct msg *msgptr)
206{
207	int error;
208
209	MAC_POLICY_CHECK_NOSLEEP(sysvmsq_check_msgrmid, cred, msgptr,
210	    msgptr->label);
211	MAC_CHECK_PROBE2(sysvmsq_check_msgrmid, error, cred, msgptr);
212
213	return (error);
214}
215
216MAC_CHECK_PROBE_DEFINE2(sysvmsq_check_msqget, "struct ucred *",
217    "struct msqid_kernel *");
218
219int
220mac_sysvmsq_check_msqget(struct ucred *cred, struct msqid_kernel *msqkptr)
221{
222	int error;
223
224	MAC_POLICY_CHECK_NOSLEEP(sysvmsq_check_msqget, cred, msqkptr,
225	    msqkptr->label);
226	MAC_CHECK_PROBE2(sysvmsq_check_msqget, error, cred, msqkptr);
227
228	return (error);
229}
230
231MAC_CHECK_PROBE_DEFINE2(sysvmsq_check_msqsnd, "struct ucred *",
232    "struct msqid_kernel *");
233
234int
235mac_sysvmsq_check_msqsnd(struct ucred *cred, struct msqid_kernel *msqkptr)
236{
237	int error;
238
239	MAC_POLICY_CHECK_NOSLEEP(sysvmsq_check_msqsnd, cred, msqkptr,
240	    msqkptr->label);
241	MAC_CHECK_PROBE2(sysvmsq_check_msqsnd, error, cred, msqkptr);
242
243	return (error);
244}
245
246MAC_CHECK_PROBE_DEFINE2(sysvmsq_check_msqrcv, "struct ucred *",
247    "struct msqid_kernel *");
248
249int
250mac_sysvmsq_check_msqrcv(struct ucred *cred, struct msqid_kernel *msqkptr)
251{
252	int error;
253
254	MAC_POLICY_CHECK_NOSLEEP(sysvmsq_check_msqrcv, cred, msqkptr,
255	    msqkptr->label);
256	MAC_CHECK_PROBE2(sysvmsq_check_msqrcv, error, cred, msqkptr);
257
258	return (error);
259}
260
261MAC_CHECK_PROBE_DEFINE3(sysvmsq_check_msqctl, "struct ucred *",
262    "struct msqid_kernel *", "int");
263
264int
265mac_sysvmsq_check_msqctl(struct ucred *cred, struct msqid_kernel *msqkptr,
266    int cmd)
267{
268	int error;
269
270	MAC_POLICY_CHECK_NOSLEEP(sysvmsq_check_msqctl, cred, msqkptr,
271	    msqkptr->label, cmd);
272	MAC_CHECK_PROBE3(sysvmsq_check_msqctl, error, cred, msqkptr, cmd);
273
274	return (error);
275}
276