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 __FBSDID("$FreeBSD$");
43
44 #include "opt_mac.h"
45
46 #include <sys/param.h>
47 #include <sys/kernel.h>
48 #include <sys/lock.h>
49 #include <sys/malloc.h>
50 #include <sys/mutex.h>
51 #include <sys/sbuf.h>
52 #include <sys/sdt.h>
53 #include <sys/systm.h>
54 #include <sys/vnode.h>
55 #include <sys/mount.h>
56 #include <sys/file.h>
57 #include <sys/namei.h>
58 #include <sys/sysctl.h>
59 #include <sys/msg.h>
60
61 #include <security/mac/mac_framework.h>
62 #include <security/mac/mac_internal.h>
63 #include <security/mac/mac_policy.h>
64
65 static struct label *
66 mac_sysv_msgmsg_label_alloc(void)
67 {
68 struct label *label;
69
70 label = mac_labelzone_alloc(M_WAITOK);
71 MAC_POLICY_PERFORM(sysvmsg_init_label, label);
72 return (label);
73 }
74
75 void
76 mac_sysvmsg_init(struct msg *msgptr)
77 {
78
79 if (mac_labeled & MPC_OBJECT_SYSVMSG)
80 msgptr->label = mac_sysv_msgmsg_label_alloc();
81 else
82 msgptr->label = NULL;
83 }
84
85 static struct label *
86 mac_sysv_msgqueue_label_alloc(void)
87 {
88 struct label *label;
89
90 label = mac_labelzone_alloc(M_WAITOK);
91 MAC_POLICY_PERFORM(sysvmsq_init_label, label);
92 return (label);
93 }
94
95 void
96 mac_sysvmsq_init(struct msqid_kernel *msqkptr)
97 {
98
99 if (mac_labeled & MPC_OBJECT_SYSVMSQ)
100 msqkptr->label = mac_sysv_msgqueue_label_alloc();
101 else
102 msqkptr->label = NULL;
103 }
104
105 static void
106 mac_sysv_msgmsg_label_free(struct label *label)
107 {
108
109 MAC_POLICY_PERFORM_NOSLEEP(sysvmsg_destroy_label, label);
110 mac_labelzone_free(label);
111 }
112
113 void
114 mac_sysvmsg_destroy(struct msg *msgptr)
115 {
116
117 if (msgptr->label != NULL) {
118 mac_sysv_msgmsg_label_free(msgptr->label);
119 msgptr->label = NULL;
120 }
121 }
122
123 static void
124 mac_sysv_msgqueue_label_free(struct label *label)
125 {
126
127 MAC_POLICY_PERFORM_NOSLEEP(sysvmsq_destroy_label, label);
128 mac_labelzone_free(label);
129 }
130
131 void
132 mac_sysvmsq_destroy(struct msqid_kernel *msqkptr)
133 {
134
135 if (msqkptr->label != NULL) {
136 mac_sysv_msgqueue_label_free(msqkptr->label);
137 msqkptr->label = NULL;
138 }
139 }
140
141 void
142 mac_sysvmsg_create(struct ucred *cred, struct msqid_kernel *msqkptr,
143 struct msg *msgptr)
144 {
145
146 MAC_POLICY_PERFORM_NOSLEEP(sysvmsg_create, cred, msqkptr,
147 msqkptr->label, msgptr, msgptr->label);
148 }
149
150 void
151 mac_sysvmsq_create(struct ucred *cred, struct msqid_kernel *msqkptr)
152 {
153
154 MAC_POLICY_PERFORM_NOSLEEP(sysvmsq_create, cred, msqkptr,
155 msqkptr->label);
156 }
157
158 void
159 mac_sysvmsg_cleanup(struct msg *msgptr)
160 {
161
162 MAC_POLICY_PERFORM_NOSLEEP(sysvmsg_cleanup, msgptr->label);
163 }
164
165 void
166 mac_sysvmsq_cleanup(struct msqid_kernel *msqkptr)
167 {
168
169 MAC_POLICY_PERFORM_NOSLEEP(sysvmsq_cleanup, msqkptr->label);
170 }
171
172 MAC_CHECK_PROBE_DEFINE3(sysvmsq_check_msgmsq, "struct ucred *",
173 "struct msg *", "struct msqid_kernel *");
174
175 int
176 mac_sysvmsq_check_msgmsq(struct ucred *cred, struct msg *msgptr,
177 struct msqid_kernel *msqkptr)
178 {
179 int error;
180
181 MAC_POLICY_CHECK_NOSLEEP(sysvmsq_check_msgmsq, cred, msgptr,
182 msgptr->label, msqkptr, msqkptr->label);
183 MAC_CHECK_PROBE3(sysvmsq_check_msgmsq, error, cred, msgptr, msqkptr);
184
185 return (error);
186 }
187
188 MAC_CHECK_PROBE_DEFINE2(sysvmsq_check_msgrcv, "struct ucred *",
189 "struct msg *");
190
191 int
192 mac_sysvmsq_check_msgrcv(struct ucred *cred, struct msg *msgptr)
193 {
194 int error;
195
196 MAC_POLICY_CHECK_NOSLEEP(sysvmsq_check_msgrcv, cred, msgptr,
197 msgptr->label);
198 MAC_CHECK_PROBE2(sysvmsq_check_msgrcv, error, cred, msgptr);
199
200 return (error);
201 }
202
203 MAC_CHECK_PROBE_DEFINE2(sysvmsq_check_msgrmid, "struct ucred *",
204 "struct msg *");
205
206 int
207 mac_sysvmsq_check_msgrmid(struct ucred *cred, struct msg *msgptr)
208 {
209 int error;
210
211 MAC_POLICY_CHECK_NOSLEEP(sysvmsq_check_msgrmid, cred, msgptr,
212 msgptr->label);
213 MAC_CHECK_PROBE2(sysvmsq_check_msgrmid, error, cred, msgptr);
214
215 return (error);
216 }
217
218 MAC_CHECK_PROBE_DEFINE2(sysvmsq_check_msqget, "struct ucred *",
219 "struct msqid_kernel *");
220
221 int
222 mac_sysvmsq_check_msqget(struct ucred *cred, struct msqid_kernel *msqkptr)
223 {
224 int error;
225
226 MAC_POLICY_CHECK_NOSLEEP(sysvmsq_check_msqget, cred, msqkptr,
227 msqkptr->label);
228 MAC_CHECK_PROBE2(sysvmsq_check_msqget, error, cred, msqkptr);
229
230 return (error);
231 }
232
233 MAC_CHECK_PROBE_DEFINE2(sysvmsq_check_msqsnd, "struct ucred *",
234 "struct msqid_kernel *");
235
236 int
237 mac_sysvmsq_check_msqsnd(struct ucred *cred, struct msqid_kernel *msqkptr)
238 {
239 int error;
240
241 MAC_POLICY_CHECK_NOSLEEP(sysvmsq_check_msqsnd, cred, msqkptr,
242 msqkptr->label);
243 MAC_CHECK_PROBE2(sysvmsq_check_msqsnd, error, cred, msqkptr);
244
245 return (error);
246 }
247
248 MAC_CHECK_PROBE_DEFINE2(sysvmsq_check_msqrcv, "struct ucred *",
249 "struct msqid_kernel *");
250
251 int
252 mac_sysvmsq_check_msqrcv(struct ucred *cred, struct msqid_kernel *msqkptr)
253 {
254 int error;
255
256 MAC_POLICY_CHECK_NOSLEEP(sysvmsq_check_msqrcv, cred, msqkptr,
257 msqkptr->label);
258 MAC_CHECK_PROBE2(sysvmsq_check_msqrcv, error, cred, msqkptr);
259
260 return (error);
261 }
262
263 MAC_CHECK_PROBE_DEFINE3(sysvmsq_check_msqctl, "struct ucred *",
264 "struct msqid_kernel *", "int");
265
266 int
267 mac_sysvmsq_check_msqctl(struct ucred *cred, struct msqid_kernel *msqkptr,
268 int cmd)
269 {
270 int error;
271
272 MAC_POLICY_CHECK_NOSLEEP(sysvmsq_check_msqctl, cred, msqkptr,
273 msqkptr->label, cmd);
274 MAC_CHECK_PROBE3(sysvmsq_check_msqctl, error, cred, msqkptr, cmd);
275
276 return (error);
277 }
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