1 /*- 2 * Copyright (c) 2003-2006 SPARTA, 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 * This software was enhanced by SPARTA ISSO under SPAWAR contract 11 * N66001-04-C-6019 ("SEFOS"). 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #include "opt_mac.h" 39 40 #include <sys/param.h> 41 #include <sys/kernel.h> 42 #include <sys/mman.h> 43 #include <sys/malloc.h> 44 #include <sys/module.h> 45 #include <sys/systm.h> 46 #include <sys/sysctl.h> 47 48 #include <security/mac/mac_framework.h> 49 #include <security/mac/mac_internal.h> 50 #include <security/mac/mac_policy.h> 51 52 static struct label * 53 mac_posixshm_label_alloc(void) 54 { 55 struct label *label; 56 57 label = mac_labelzone_alloc(M_WAITOK); 58 MAC_PERFORM(posixshm_init_label, label); 59 return (label); 60 } 61 62 void 63 mac_posixshm_init(struct shmfd *shmfd) 64 { 65 66 shmfd->shm_label = mac_posixshm_label_alloc(); 67 } 68 69 static void 70 mac_posixshm_label_free(struct label *label) 71 { 72 73 MAC_PERFORM(posixshm_destroy_label, label); 74 mac_labelzone_free(label); 75 } 76 77 void 78 mac_posixshm_destroy(struct shmfd *shmfd) 79 { 80 81 mac_posixshm_label_free(shmfd->shm_label); 82 shmfd->shm_label = NULL; 83 } 84 85 void 86 mac_posixshm_create(struct ucred *cred, struct shmfd *shmfd) 87 { 88 89 MAC_PERFORM(posixshm_create, cred, shmfd, shmfd->shm_label); 90 } 91 92 int 93 mac_posixshm_check_mmap(struct ucred *cred, struct shmfd *shmfd, int prot, 94 int flags) 95 { 96 int error; 97 98 MAC_CHECK(posixshm_check_mmap, cred, shmfd, shmfd->shm_label, prot, 99 flags); 100 101 return (error); 102 } 103 104 int 105 mac_posixshm_check_open(struct ucred *cred, struct shmfd *shmfd) 106 { 107 int error; 108 109 MAC_CHECK(posixshm_check_open, cred, shmfd, shmfd->shm_label); 110 111 return (error); 112 } 113 114 int 115 mac_posixshm_check_stat(struct ucred *active_cred, struct ucred *file_cred, 116 struct shmfd *shmfd) 117 { 118 int error; 119 120 MAC_CHECK(posixshm_check_stat, active_cred, file_cred, shmfd, 121 shmfd->shm_label); 122 123 return (error); 124 } 125 126 int 127 mac_posixshm_check_truncate(struct ucred *active_cred, struct ucred *file_cred, 128 struct shmfd *shmfd) 129 { 130 int error; 131 132 MAC_CHECK(posixshm_check_truncate, active_cred, file_cred, shmfd, 133 shmfd->shm_label); 134 135 return (error); 136 } 137 138 int 139 mac_posixshm_check_unlink(struct ucred *cred, struct shmfd *shmfd) 140 { 141 int error; 142 143 MAC_CHECK(posixshm_check_unlink, cred, shmfd, shmfd->shm_label); 144 145 return (error); 146 } 147