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 #include "opt_posix.h" 40 41 #include <sys/param.h> 42 #include <sys/kernel.h> 43 #include <sys/ksem.h> 44 #include <sys/malloc.h> 45 #include <sys/module.h> 46 #include <sys/systm.h> 47 #include <sys/sysctl.h> 48 49 #include <security/mac/mac_framework.h> 50 #include <security/mac/mac_internal.h> 51 #include <security/mac/mac_policy.h> 52 53 static struct label * 54 mac_posixsem_label_alloc(void) 55 { 56 struct label *label; 57 58 label = mac_labelzone_alloc(M_WAITOK); 59 MAC_PERFORM(posixsem_init_label, label); 60 return (label); 61 } 62 63 void 64 mac_posixsem_init(struct ksem *ks) 65 { 66 67 ks->ks_label = mac_posixsem_label_alloc(); 68 } 69 70 static void 71 mac_posixsem_label_free(struct label *label) 72 { 73 74 MAC_PERFORM(posixsem_destroy_label, label); 75 mac_labelzone_free(label); 76 } 77 78 void 79 mac_posixsem_destroy(struct ksem *ks) 80 { 81 82 mac_posixsem_label_free(ks->ks_label); 83 ks->ks_label = NULL; 84 } 85 86 void 87 mac_posixsem_create(struct ucred *cred, struct ksem *ks) 88 { 89 90 MAC_PERFORM(posixsem_create, cred, ks, ks->ks_label); 91 } 92 93 int 94 mac_posixsem_check_open(struct ucred *cred, struct ksem *ks) 95 { 96 int error; 97 98 MAC_CHECK(posixsem_check_open, cred, ks, ks->ks_label); 99 100 return (error); 101 } 102 103 int 104 mac_posixsem_check_getvalue(struct ucred *active_cred, struct ucred *file_cred, 105 struct ksem *ks) 106 { 107 int error; 108 109 MAC_CHECK(posixsem_check_getvalue, active_cred, file_cred, ks, 110 ks->ks_label); 111 112 return (error); 113 } 114 115 int 116 mac_posixsem_check_post(struct ucred *active_cred, struct ucred *file_cred, 117 struct ksem *ks) 118 { 119 int error; 120 121 MAC_CHECK(posixsem_check_post, active_cred, file_cred, ks, 122 ks->ks_label); 123 124 return (error); 125 } 126 127 int 128 mac_posixsem_check_stat(struct ucred *active_cred, struct ucred *file_cred, 129 struct ksem *ks) 130 { 131 int error; 132 133 MAC_CHECK(posixsem_check_stat, active_cred, file_cred, ks, 134 ks->ks_label); 135 136 return (error); 137 } 138 139 int 140 mac_posixsem_check_unlink(struct ucred *cred, struct ksem *ks) 141 { 142 int error; 143 144 MAC_CHECK(posixsem_check_unlink, cred, ks, ks->ks_label); 145 146 return (error); 147 } 148 149 int 150 mac_posixsem_check_wait(struct ucred *active_cred, struct ucred *file_cred, 151 struct ksem *ks) 152 { 153 int error; 154 155 MAC_CHECK(posixsem_check_wait, active_cred, file_cred, ks, 156 ks->ks_label); 157 158 return (error); 159 } 160