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 63 static struct label * 64 mac_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 73 void 74 mac_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 83 static struct label * 84 mac_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 93 void 94 mac_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 } 102 103 static void 104 mac_sysv_msgmsg_label_free(struct label *label) 105 { 106 107 MAC_POLICY_PERFORM_NOSLEEP(sysvmsg_destroy_label, label); 108 mac_labelzone_free(label); 109 } 110 111 void 112 mac_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 } 120 121 static void 122 mac_sysv_msgqueue_label_free(struct label *label) 123 { 124 125 MAC_POLICY_PERFORM_NOSLEEP(sysvmsq_destroy_label, label); 126 mac_labelzone_free(label); 127 } 128 129 void 130 mac_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 } 138 139 void 140 mac_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 } 147 148 void 149 mac_sysvmsq_create(struct ucred *cred, struct msqid_kernel *msqkptr) 150 { 151 152 MAC_POLICY_PERFORM_NOSLEEP(sysvmsq_create, cred, msqkptr, 153 msqkptr->label); 154 } 155 156 void 157 mac_sysvmsg_cleanup(struct msg *msgptr) 158 { 159 160 MAC_POLICY_PERFORM_NOSLEEP(sysvmsg_cleanup, msgptr->label); 161 } 162 163 void 164 mac_sysvmsq_cleanup(struct msqid_kernel *msqkptr) 165 { 166 167 MAC_POLICY_PERFORM_NOSLEEP(sysvmsq_cleanup, msqkptr->label); 168 } 169 170 MAC_CHECK_PROBE_DEFINE3(sysvmsq_check_msgmsq, "struct ucred *", 171 "struct msg *", "struct msqid_kernel *"); 172 173 int 174 mac_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 } 185 186 MAC_CHECK_PROBE_DEFINE2(sysvmsq_check_msgrcv, "struct ucred *", 187 "struct msg *"); 188 189 int 190 mac_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 } 200 201 MAC_CHECK_PROBE_DEFINE2(sysvmsq_check_msgrmid, "struct ucred *", 202 "struct msg *"); 203 204 int 205 mac_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 } 215 216 MAC_CHECK_PROBE_DEFINE2(sysvmsq_check_msqget, "struct ucred *", 217 "struct msqid_kernel *"); 218 219 int 220 mac_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 } 230 231 MAC_CHECK_PROBE_DEFINE2(sysvmsq_check_msqsnd, "struct ucred *", 232 "struct msqid_kernel *"); 233 234 int 235 mac_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 } 245 246 MAC_CHECK_PROBE_DEFINE2(sysvmsq_check_msqrcv, "struct ucred *", 247 "struct msqid_kernel *"); 248 249 int 250 mac_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 } 260 261 MAC_CHECK_PROBE_DEFINE3(sysvmsq_check_msqctl, "struct ucred *", 262 "struct msqid_kernel *", "int"); 263 264 int 265 mac_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