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_kdtrace.h"
45 #include "opt_mac.h"
46
47 #include <sys/param.h>
48 #include <sys/kernel.h>
49 #include <sys/lock.h>
50 #include <sys/malloc.h>
51 #include <sys/mutex.h>
52 #include <sys/sbuf.h>
53 #include <sys/sdt.h>
54 #include <sys/systm.h>
55 #include <sys/vnode.h>
56 #include <sys/mount.h>
57 #include <sys/file.h>
58 #include <sys/namei.h>
59 #include <sys/sysctl.h>
60 #include <sys/msg.h>
61
62 #include <security/mac/mac_framework.h>
63 #include <security/mac/mac_internal.h>
64 #include <security/mac/mac_policy.h>
65
66 static struct label *
67 mac_sysv_msgmsg_label_alloc(void)
68 {
69 struct label *label;
70
71 label = mac_labelzone_alloc(M_WAITOK);
72 MAC_POLICY_PERFORM(sysvmsg_init_label, label);
73 return (label);
74 }
75
76 void
77 mac_sysvmsg_init(struct msg *msgptr)
78 {
79
80 if (mac_labeled & MPC_OBJECT_SYSVMSG)
81 msgptr->label = mac_sysv_msgmsg_label_alloc();
82 else
83 msgptr->label = NULL;
84 }
85
86 static struct label *
87 mac_sysv_msgqueue_label_alloc(void)
88 {
89 struct label *label;
90
91 label = mac_labelzone_alloc(M_WAITOK);
92 MAC_POLICY_PERFORM(sysvmsq_init_label, label);
93 return (label);
94 }
95
96 void
97 mac_sysvmsq_init(struct msqid_kernel *msqkptr)
98 {
99
100 if (mac_labeled & MPC_OBJECT_SYSVMSQ)
101 msqkptr->label = mac_sysv_msgqueue_label_alloc();
102 else
103 msqkptr->label = NULL;
104 }
105
106 static void
107 mac_sysv_msgmsg_label_free(struct label *label)
108 {
109
110 MAC_POLICY_PERFORM_NOSLEEP(sysvmsg_destroy_label, label);
111 mac_labelzone_free(label);
112 }
113
114 void
115 mac_sysvmsg_destroy(struct msg *msgptr)
116 {
117
118 if (msgptr->label != NULL) {
119 mac_sysv_msgmsg_label_free(msgptr->label);
120 msgptr->label = NULL;
121 }
122 }
123
124 static void
125 mac_sysv_msgqueue_label_free(struct label *label)
126 {
127
128 MAC_POLICY_PERFORM_NOSLEEP(sysvmsq_destroy_label, label);
129 mac_labelzone_free(label);
130 }
131
132 void
133 mac_sysvmsq_destroy(struct msqid_kernel *msqkptr)
134 {
135
136 if (msqkptr->label != NULL) {
137 mac_sysv_msgqueue_label_free(msqkptr->label);
138 msqkptr->label = NULL;
139 }
140 }
141
142 void
143 mac_sysvmsg_create(struct ucred *cred, struct msqid_kernel *msqkptr,
144 struct msg *msgptr)
145 {
146
147 MAC_POLICY_PERFORM_NOSLEEP(sysvmsg_create, cred, msqkptr,
148 msqkptr->label, msgptr, msgptr->label);
149 }
150
151 void
152 mac_sysvmsq_create(struct ucred *cred, struct msqid_kernel *msqkptr)
153 {
154
155 MAC_POLICY_PERFORM_NOSLEEP(sysvmsq_create, cred, msqkptr,
156 msqkptr->label);
157 }
158
159 void
160 mac_sysvmsg_cleanup(struct msg *msgptr)
161 {
162
163 MAC_POLICY_PERFORM_NOSLEEP(sysvmsg_cleanup, msgptr->label);
164 }
165
166 void
167 mac_sysvmsq_cleanup(struct msqid_kernel *msqkptr)
168 {
169
170 MAC_POLICY_PERFORM_NOSLEEP(sysvmsq_cleanup, msqkptr->label);
171 }
172
173 MAC_CHECK_PROBE_DEFINE3(sysvmsq_check_msgmsq, "struct ucred *",
174 "struct msg *", "struct msqid_kernel *");
175
176 int
177 mac_sysvmsq_check_msgmsq(struct ucred *cred, struct msg *msgptr,
178 struct msqid_kernel *msqkptr)
179 {
180 int error;
181
182 MAC_POLICY_CHECK_NOSLEEP(sysvmsq_check_msgmsq, cred, msgptr,
183 msgptr->label, msqkptr, msqkptr->label);
184 MAC_CHECK_PROBE3(sysvmsq_check_msgmsq, error, cred, msgptr, msqkptr);
185
186 return (error);
187 }
188
189 MAC_CHECK_PROBE_DEFINE2(sysvmsq_check_msgrcv, "struct ucred *",
190 "struct msg *");
191
192 int
193 mac_sysvmsq_check_msgrcv(struct ucred *cred, struct msg *msgptr)
194 {
195 int error;
196
197 MAC_POLICY_CHECK_NOSLEEP(sysvmsq_check_msgrcv, cred, msgptr,
198 msgptr->label);
199 MAC_CHECK_PROBE2(sysvmsq_check_msgrcv, error, cred, msgptr);
200
201 return (error);
202 }
203
204 MAC_CHECK_PROBE_DEFINE2(sysvmsq_check_msgrmid, "struct ucred *",
205 "struct msg *");
206
207 int
208 mac_sysvmsq_check_msgrmid(struct ucred *cred, struct msg *msgptr)
209 {
210 int error;
211
212 MAC_POLICY_CHECK_NOSLEEP(sysvmsq_check_msgrmid, cred, msgptr,
213 msgptr->label);
214 MAC_CHECK_PROBE2(sysvmsq_check_msgrmid, error, cred, msgptr);
215
216 return (error);
217 }
218
219 MAC_CHECK_PROBE_DEFINE2(sysvmsq_check_msqget, "struct ucred *",
220 "struct msqid_kernel *");
221
222 int
223 mac_sysvmsq_check_msqget(struct ucred *cred, struct msqid_kernel *msqkptr)
224 {
225 int error;
226
227 MAC_POLICY_CHECK_NOSLEEP(sysvmsq_check_msqget, cred, msqkptr,
228 msqkptr->label);
229 MAC_CHECK_PROBE2(sysvmsq_check_msqget, error, cred, msqkptr);
230
231 return (error);
232 }
233
234 MAC_CHECK_PROBE_DEFINE2(sysvmsq_check_msqsnd, "struct ucred *",
235 "struct msqid_kernel *");
236
237 int
238 mac_sysvmsq_check_msqsnd(struct ucred *cred, struct msqid_kernel *msqkptr)
239 {
240 int error;
241
242 MAC_POLICY_CHECK_NOSLEEP(sysvmsq_check_msqsnd, cred, msqkptr,
243 msqkptr->label);
244 MAC_CHECK_PROBE2(sysvmsq_check_msqsnd, error, cred, msqkptr);
245
246 return (error);
247 }
248
249 MAC_CHECK_PROBE_DEFINE2(sysvmsq_check_msqrcv, "struct ucred *",
250 "struct msqid_kernel *");
251
252 int
253 mac_sysvmsq_check_msqrcv(struct ucred *cred, struct msqid_kernel *msqkptr)
254 {
255 int error;
256
257 MAC_POLICY_CHECK_NOSLEEP(sysvmsq_check_msqrcv, cred, msqkptr,
258 msqkptr->label);
259 MAC_CHECK_PROBE2(sysvmsq_check_msqrcv, error, cred, msqkptr);
260
261 return (error);
262 }
263
264 MAC_CHECK_PROBE_DEFINE3(sysvmsq_check_msqctl, "struct ucred *",
265 "struct msqid_kernel *", "int");
266
267 int
268 mac_sysvmsq_check_msqctl(struct ucred *cred, struct msqid_kernel *msqkptr,
269 int cmd)
270 {
271 int error;
272
273 MAC_POLICY_CHECK_NOSLEEP(sysvmsq_check_msqctl, cred, msqkptr,
274 msqkptr->label, cmd);
275 MAC_CHECK_PROBE3(sysvmsq_check_msqctl, error, cred, msqkptr, cmd);
276
277 return (error);
278 }
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