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 80static struct label * 81mac_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 92void 93mac_sysvshm_label_init(struct shmid_kernel *shmsegptr) 94{ 95 96 shmsegptr->label = mac_sysv_shm_label_alloc(); 97} 98 99static void 100mac_sysv_shm_label_free(struct label *label) 101{ 102 103 MAC_PERFORM(sysvshm_label_destroy, label); 104 mac_labelzone_free(label); 105} 106 107void 108mac_sysvshm_label_destroy(struct shmid_kernel *shmsegptr) 109{ 110 111 mac_sysv_shm_label_free(shmsegptr->label); 112 shmsegptr->label = NULL; 113} 114 115void 116mac_sysvshm_label_associate(struct ucred *cred, struct shmid_kernel *shmsegptr) 117{ 118 119 MAC_PERFORM(sysvshm_label_associate, cred, shmsegptr, shmsegptr->label); 120} 121 122void 123mac_sysvshm_label_recycle(struct shmid_kernel *shmsegptr) 124{ 125 126 MAC_PERFORM(sysvshm_label_recycle, shmsegptr->label); 127} 128 129int 130mac_sysvshm_check_shmat(struct ucred *cred, struct shmid_kernel *shmsegptr, 131 int shmflg) 132{ 133 int error; 134 135 if (!mac_sysvshm_enforce) 136 return 0; 137 138 MAC_CHECK(sysvshm_check_shmat, cred, shmsegptr, shmsegptr->label, 139 shmflg); 140 141 return(error); 142} 143 144int 145mac_sysvshm_check_shmctl(struct ucred *cred, struct shmid_kernel *shmsegptr, 146 int cmd) 147{ 148 int error; 149 150 if (!mac_sysvshm_enforce) 151 return 0; 152 153 MAC_CHECK(sysvshm_check_shmctl, cred, shmsegptr, shmsegptr->label, 154 cmd); 155 156 return(error); 157} 158 159int 160mac_sysvshm_check_shmdt(struct ucred *cred, struct shmid_kernel *shmsegptr) 161{ 162 int error; 163 164 if (!mac_sysvshm_enforce) 165 return 0; 166 167 MAC_CHECK(sysvshm_check_shmdt, cred, shmsegptr, shmsegptr->label); 168 169 return(error); 170} 171 172int 173mac_sysvshm_check_shmget(struct ucred *cred, struct shmid_kernel *shmsegptr, 174 int shmflg) 175{ 176 int error; 177 178 if (!mac_sysvshm_enforce) 179 return 0; 180 181 MAC_CHECK(sysvshm_check_shmget, cred, shmsegptr, shmsegptr->label, 182 shmflg); 183 184 return(error); 185} 186