1 /*- 2 * Copyright (c) 2003-2004 Networks Associates Technology, Inc. 3 * All rights reserved. 4 * 5 * This software was developed for the FreeBSD Project in part by Network 6 * Associates Laboratories, the Security Research Division of Network 7 * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), 8 * as part of the DARPA CHATS research program. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include "opt_mac.h" 36 37 #include <sys/param.h> 38 #include <sys/kernel.h> 39 #include <sys/lock.h> 40 #include <sys/malloc.h> 41 #include <sys/mutex.h> 42 #include <sys/sbuf.h> 43 #include <sys/systm.h> 44 #include <sys/vnode.h> 45 #include <sys/mount.h> 46 #include <sys/file.h> 47 #include <sys/namei.h> 48 #include <sys/sysctl.h> 49 #include <sys/shm.h> 50 51 #include <security/mac/mac_framework.h> 52 #include <security/mac/mac_internal.h> 53 #include <security/mac/mac_policy.h> 54 55 static struct label * 56 mac_sysv_shm_label_alloc(void) 57 { 58 struct label *label; 59 60 label = mac_labelzone_alloc(M_WAITOK); 61 MAC_PERFORM(init_sysv_shm_label, label); 62 return (label); 63 } 64 65 void 66 mac_init_sysv_shm(struct shmid_kernel *shmsegptr) 67 { 68 69 shmsegptr->label = mac_sysv_shm_label_alloc(); 70 } 71 72 static void 73 mac_sysv_shm_label_free(struct label *label) 74 { 75 76 MAC_PERFORM(destroy_sysv_shm_label, label); 77 mac_labelzone_free(label); 78 } 79 80 void 81 mac_destroy_sysv_shm(struct shmid_kernel *shmsegptr) 82 { 83 84 mac_sysv_shm_label_free(shmsegptr->label); 85 shmsegptr->label = NULL; 86 } 87 88 void 89 mac_create_sysv_shm(struct ucred *cred, struct shmid_kernel *shmsegptr) 90 { 91 92 MAC_PERFORM(create_sysv_shm, cred, shmsegptr, shmsegptr->label); 93 } 94 95 void 96 mac_cleanup_sysv_shm(struct shmid_kernel *shmsegptr) 97 { 98 99 MAC_PERFORM(cleanup_sysv_shm, shmsegptr->label); 100 } 101 102 int 103 mac_check_sysv_shmat(struct ucred *cred, struct shmid_kernel *shmsegptr, 104 int shmflg) 105 { 106 int error; 107 108 MAC_CHECK(check_sysv_shmat, cred, shmsegptr, shmsegptr->label, 109 shmflg); 110 111 return (error); 112 } 113 114 int 115 mac_check_sysv_shmctl(struct ucred *cred, struct shmid_kernel *shmsegptr, 116 int cmd) 117 { 118 int error; 119 120 MAC_CHECK(check_sysv_shmctl, cred, shmsegptr, shmsegptr->label, 121 cmd); 122 123 return (error); 124 } 125 126 int 127 mac_check_sysv_shmdt(struct ucred *cred, struct shmid_kernel *shmsegptr) 128 { 129 int error; 130 131 MAC_CHECK(check_sysv_shmdt, cred, shmsegptr, shmsegptr->label); 132 133 return (error); 134 } 135 136 int 137 mac_check_sysv_shmget(struct ucred *cred, struct shmid_kernel *shmsegptr, 138 int shmflg) 139 { 140 int error; 141 142 MAC_CHECK(check_sysv_shmget, cred, shmsegptr, shmsegptr->label, 143 shmflg); 144 145 return (error); 146 } 147