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/param.h> 62 #include <sys/kernel.h> 63 #include <sys/lock.h> 64 #include <sys/malloc.h> 65 #include <sys/sbuf.h> 66 #include <sys/systm.h> 67 #include <sys/vnode.h> 68 #include <sys/mount.h> 69 #include <sys/file.h> 70 #include <sys/namei.h> 71 #include <sys/sysctl.h> 72 #include <sys/sem.h> 73 #include <sys/sem_internal.h> 74 75 #include <security/mac_internal.h> 76 77 78 static struct label * 79 mac_sysv_sem_label_alloc(void) 80 { 81 struct label *label; 82 83 label = mac_labelzone_alloc(MAC_WAITOK); 84 if (label == NULL) 85 return (NULL); 86 MAC_PERFORM(sysvsem_label_init, label); 87 return (label); 88 } 89 90 void 91 mac_sysvsem_label_init(struct semid_kernel *semakptr) 92 { 93 94 semakptr->label = mac_sysv_sem_label_alloc(); 95 } 96 97 static void 98 mac_sysv_sem_label_free(struct label *label) 99 { 100 101 MAC_PERFORM(sysvsem_label_destroy, label); 102 mac_labelzone_free(label); 103 } 104 105 void 106 mac_sysvsem_label_destroy(struct semid_kernel *semakptr) 107 { 108 109 mac_sysv_sem_label_free(semakptr->label); 110 semakptr->label = NULL; 111 } 112 113 void 114 mac_sysvsem_label_associate(kauth_cred_t cred, struct semid_kernel *semakptr) 115 { 116 117 MAC_PERFORM(sysvsem_label_associate, cred, semakptr, semakptr->label); 118 } 119 120 void 121 mac_sysvsem_label_recycle(struct semid_kernel *semakptr) 122 { 123 124 MAC_PERFORM(sysvsem_label_recycle, semakptr->label); 125 } 126 127 int 128 mac_sysvsem_check_semctl(kauth_cred_t cred, struct semid_kernel *semakptr, 129 int cmd) 130 { 131 int error; 132 133 if (!mac_sysvsem_enforce) 134 return (0); 135 136 MAC_CHECK(sysvsem_check_semctl, cred, semakptr, semakptr->label, cmd); 137 138 return(error); 139 } 140 141 int 142 mac_sysvsem_check_semget(kauth_cred_t cred, struct semid_kernel *semakptr) 143 { 144 int error; 145 146 if (!mac_sysvsem_enforce) 147 return (0); 148 149 MAC_CHECK(sysvsem_check_semget, cred, semakptr, semakptr->label); 150 151 return(error); 152 } 153 154 int 155 mac_sysvsem_check_semop(kauth_cred_t cred, struct semid_kernel *semakptr, 156 size_t accesstype) 157 { 158 int error; 159 160 if (!mac_sysvsem_enforce) 161 return (0); 162 163 MAC_CHECK(sysvsem_check_semop, cred, semakptr, semakptr->label, 164 accesstype); 165 166 return(error); 167 } 168