1 | /* |
2 | * Copyright (c) 2007 Apple Inc. All rights reserved. |
3 | * |
4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
5 | * |
6 | * This file contains Original Code and/or Modifications of Original Code |
7 | * as defined in and that are subject to the Apple Public Source License |
8 | * Version 2.0 (the 'License'). You may not use this file except in |
9 | * compliance with the License. The rights granted to you under the License |
10 | * may not be used to create, or enable the creation or redistribution of, |
11 | * unlawful or unlicensed copies of an Apple operating system, or to |
12 | * circumvent, violate, or enable the circumvention or violation of, any |
13 | * terms of an Apple operating system software license agreement. |
14 | * |
15 | * Please obtain a copy of the License at |
16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. |
17 | * |
18 | * The Original Code and all software distributed under the License are |
19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
23 | * Please see the License for the specific language governing rights and |
24 | * limitations under the License. |
25 | * |
26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
27 | */ |
28 | /*- |
29 | * Copyright (c) 2003-2004 Networks Associates Technology, Inc. |
30 | * All rights reserved. |
31 | * |
32 | * This software was developed for the FreeBSD Project in part by Network |
33 | * Associates Laboratories, the Security Research Division of Network |
34 | * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), |
35 | * as part of the DARPA CHATS research program. |
36 | * |
37 | * Redistribution and use in source and binary forms, with or without |
38 | * modification, are permitted provided that the following conditions |
39 | * are met: |
40 | * 1. Redistributions of source code must retain the above copyright |
41 | * notice, this list of conditions and the following disclaimer. |
42 | * 2. Redistributions in binary form must reproduce the above copyright |
43 | * notice, this list of conditions and the following disclaimer in the |
44 | * documentation and/or other materials provided with the distribution. |
45 | * |
46 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
47 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
48 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
49 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
50 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
51 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
52 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
53 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
54 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
55 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
56 | * SUCH DAMAGE. |
57 | */ |
58 | |
59 | #include <sys/cdefs.h> |
60 | |
61 | #include <sys/cdefs.h> |
62 | |
63 | #include <sys/param.h> |
64 | #include <sys/kernel.h> |
65 | #include <sys/lock.h> |
66 | #include <sys/malloc.h> |
67 | #include <sys/sbuf.h> |
68 | #include <sys/systm.h> |
69 | #include <sys/vnode.h> |
70 | #include <sys/mount.h> |
71 | #include <sys/file.h> |
72 | #include <sys/namei.h> |
73 | #include <sys/sysctl.h> |
74 | #include <sys/shm.h> |
75 | #include <sys/shm_internal.h> |
76 | |
77 | #include <security/mac_internal.h> |
78 | |
79 | |
80 | static struct label * |
81 | mac_sysv_shm_label_alloc(void) |
82 | { |
83 | struct label *label; |
84 | |
85 | label = mac_labelzone_alloc(MAC_WAITOK); |
86 | if (label == NULL) |
87 | return (NULL); |
88 | MAC_PERFORM(sysvshm_label_init, label); |
89 | return (label); |
90 | } |
91 | |
92 | void |
93 | mac_sysvshm_label_init(struct shmid_kernel *shmsegptr) |
94 | { |
95 | |
96 | shmsegptr->label = mac_sysv_shm_label_alloc(); |
97 | } |
98 | |
99 | static void |
100 | mac_sysv_shm_label_free(struct label *label) |
101 | { |
102 | |
103 | MAC_PERFORM(sysvshm_label_destroy, label); |
104 | mac_labelzone_free(label); |
105 | } |
106 | |
107 | void |
108 | mac_sysvshm_label_destroy(struct shmid_kernel *shmsegptr) |
109 | { |
110 | |
111 | mac_sysv_shm_label_free(shmsegptr->label); |
112 | shmsegptr->label = NULL; |
113 | } |
114 | |
115 | void |
116 | mac_sysvshm_label_associate(struct ucred *cred, struct shmid_kernel *shmsegptr) |
117 | { |
118 | |
119 | MAC_PERFORM(sysvshm_label_associate, cred, shmsegptr, shmsegptr->label); |
120 | } |
121 | |
122 | void |
123 | mac_sysvshm_label_recycle(struct shmid_kernel *shmsegptr) |
124 | { |
125 | |
126 | MAC_PERFORM(sysvshm_label_recycle, shmsegptr->label); |
127 | } |
128 | |
129 | int |
130 | mac_sysvshm_check_shmat(struct ucred *cred, struct shmid_kernel *shmsegptr, |
131 | int shmflg) |
132 | { |
133 | int error; |
134 | |
135 | #if SECURITY_MAC_CHECK_ENFORCE |
136 | /* 21167099 - only check if we allow write */ |
137 | if (!mac_sysvshm_enforce) |
138 | return (0); |
139 | #endif |
140 | |
141 | MAC_CHECK(sysvshm_check_shmat, cred, shmsegptr, shmsegptr->label, |
142 | shmflg); |
143 | |
144 | return(error); |
145 | } |
146 | |
147 | int |
148 | mac_sysvshm_check_shmctl(struct ucred *cred, struct shmid_kernel *shmsegptr, |
149 | int cmd) |
150 | { |
151 | int error; |
152 | |
153 | #if SECURITY_MAC_CHECK_ENFORCE |
154 | /* 21167099 - only check if we allow write */ |
155 | if (!mac_sysvshm_enforce) |
156 | return (0); |
157 | #endif |
158 | |
159 | MAC_CHECK(sysvshm_check_shmctl, cred, shmsegptr, shmsegptr->label, |
160 | cmd); |
161 | |
162 | return(error); |
163 | } |
164 | |
165 | int |
166 | mac_sysvshm_check_shmdt(struct ucred *cred, struct shmid_kernel *shmsegptr) |
167 | { |
168 | int error; |
169 | |
170 | #if SECURITY_MAC_CHECK_ENFORCE |
171 | /* 21167099 - only check if we allow write */ |
172 | if (!mac_sysvshm_enforce) |
173 | return (0); |
174 | #endif |
175 | |
176 | MAC_CHECK(sysvshm_check_shmdt, cred, shmsegptr, shmsegptr->label); |
177 | |
178 | return(error); |
179 | } |
180 | |
181 | int |
182 | mac_sysvshm_check_shmget(struct ucred *cred, struct shmid_kernel *shmsegptr, |
183 | int shmflg) |
184 | { |
185 | int error; |
186 | |
187 | #if SECURITY_MAC_CHECK_ENFORCE |
188 | /* 21167099 - only check if we allow write */ |
189 | if (!mac_sysvshm_enforce) |
190 | return (0); |
191 | #endif |
192 | |
193 | MAC_CHECK(sysvshm_check_shmget, cred, shmsegptr, shmsegptr->label, |
194 | shmflg); |
195 | |
196 | return(error); |
197 | } |
198 | |