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_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_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_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_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_PERFORM_NOSLEEP(sysvmsg_create, cred, msqkptr, msqkptr->label, 148 msgptr, msgptr->label); 149 } 150 151 void 152 mac_sysvmsq_create(struct ucred *cred, struct msqid_kernel *msqkptr) 153 { 154 155 MAC_PERFORM_NOSLEEP(sysvmsq_create, cred, msqkptr, msqkptr->label); 156 } 157 158 void 159 mac_sysvmsg_cleanup(struct msg *msgptr) 160 { 161 162 MAC_PERFORM_NOSLEEP(sysvmsg_cleanup, msgptr->label); 163 } 164 165 void 166 mac_sysvmsq_cleanup(struct msqid_kernel *msqkptr) 167 { 168 169 MAC_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_CHECK_NOSLEEP(sysvmsq_check_msgmsq, cred, msgptr, msgptr->label, 182 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_CHECK_NOSLEEP(sysvmsq_check_msgrcv, cred, msgptr, msgptr->label); 197 MAC_CHECK_PROBE2(sysvmsq_check_msgrcv, error, cred, msgptr); 198 199 return (error); 200 } 201 202 MAC_CHECK_PROBE_DEFINE2(sysvmsq_check_msgrmid, "struct ucred *", 203 "struct msg *"); 204 205 int 206 mac_sysvmsq_check_msgrmid(struct ucred *cred, struct msg *msgptr) 207 { 208 int error; 209 210 MAC_CHECK_NOSLEEP(sysvmsq_check_msgrmid, cred, msgptr, 211 msgptr->label); 212 MAC_CHECK_PROBE2(sysvmsq_check_msgrmid, error, cred, msgptr); 213 214 return (error); 215 } 216 217 MAC_CHECK_PROBE_DEFINE2(sysvmsq_check_msqget, "struct ucred *", 218 "struct msqid_kernel *"); 219 220 int 221 mac_sysvmsq_check_msqget(struct ucred *cred, struct msqid_kernel *msqkptr) 222 { 223 int error; 224 225 MAC_CHECK_NOSLEEP(sysvmsq_check_msqget, cred, msqkptr, 226 msqkptr->label); 227 MAC_CHECK_PROBE2(sysvmsq_check_msqget, error, cred, msqkptr); 228 229 return (error); 230 } 231 232 MAC_CHECK_PROBE_DEFINE2(sysvmsq_check_msqsnd, "struct ucred *", 233 "struct msqid_kernel *"); 234 235 int 236 mac_sysvmsq_check_msqsnd(struct ucred *cred, struct msqid_kernel *msqkptr) 237 { 238 int error; 239 240 MAC_CHECK_NOSLEEP(sysvmsq_check_msqsnd, cred, msqkptr, 241 msqkptr->label); 242 MAC_CHECK_PROBE2(sysvmsq_check_msqsnd, error, cred, msqkptr); 243 244 return (error); 245 } 246 247 MAC_CHECK_PROBE_DEFINE2(sysvmsq_check_msqrcv, "struct ucred *", 248 "struct msqid_kernel *"); 249 250 int 251 mac_sysvmsq_check_msqrcv(struct ucred *cred, struct msqid_kernel *msqkptr) 252 { 253 int error; 254 255 MAC_CHECK_NOSLEEP(sysvmsq_check_msqrcv, cred, msqkptr, 256 msqkptr->label); 257 MAC_CHECK_PROBE2(sysvmsq_check_msqrcv, error, cred, msqkptr); 258 259 return (error); 260 } 261 262 MAC_CHECK_PROBE_DEFINE3(sysvmsq_check_msqctl, "struct ucred *", 263 "struct msqid_kernel *", "int"); 264 265 int 266 mac_sysvmsq_check_msqctl(struct ucred *cred, struct msqid_kernel *msqkptr, 267 int cmd) 268 { 269 int error; 270 271 MAC_CHECK_NOSLEEP(sysvmsq_check_msqctl, cred, msqkptr, 272 msqkptr->label, cmd); 273 MAC_CHECK_PROBE3(sysvmsq_check_msqctl, error, cred, msqkptr, cmd); 274 275 return (error); 276 } 277