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 if (mac_labeled & MPC_OBJECT_POSIXSEM) 68 ks->ks_label = mac_posixsem_label_alloc(); 69 else 70 ks->ks_label = NULL; 71 } 72 73 static void 74 mac_posixsem_label_free(struct label *label) 75 { 76 77 MAC_PERFORM(posixsem_destroy_label, label); 78 mac_labelzone_free(label); 79 } 80 81 void 82 mac_posixsem_destroy(struct ksem *ks) 83 { 84 85 if (ks->ks_label != NULL) { 86 mac_posixsem_label_free(ks->ks_label); 87 ks->ks_label = NULL; 88 } 89 } 90 91 void 92 mac_posixsem_create(struct ucred *cred, struct ksem *ks) 93 { 94 95 MAC_PERFORM(posixsem_create, cred, ks, ks->ks_label); 96 } 97 98 int 99 mac_posixsem_check_open(struct ucred *cred, struct ksem *ks) 100 { 101 int error; 102 103 MAC_CHECK(posixsem_check_open, cred, ks, ks->ks_label); 104 105 return (error); 106 } 107 108 int 109 mac_posixsem_check_getvalue(struct ucred *active_cred, struct ucred *file_cred, 110 struct ksem *ks) 111 { 112 int error; 113 114 MAC_CHECK(posixsem_check_getvalue, active_cred, file_cred, ks, 115 ks->ks_label); 116 117 return (error); 118 } 119 120 int 121 mac_posixsem_check_post(struct ucred *active_cred, struct ucred *file_cred, 122 struct ksem *ks) 123 { 124 int error; 125 126 MAC_CHECK(posixsem_check_post, active_cred, file_cred, ks, 127 ks->ks_label); 128 129 return (error); 130 } 131 132 int 133 mac_posixsem_check_stat(struct ucred *active_cred, struct ucred *file_cred, 134 struct ksem *ks) 135 { 136 int error; 137 138 MAC_CHECK(posixsem_check_stat, active_cred, file_cred, ks, 139 ks->ks_label); 140 141 return (error); 142 } 143 144 int 145 mac_posixsem_check_unlink(struct ucred *cred, struct ksem *ks) 146 { 147 int error; 148 149 MAC_CHECK(posixsem_check_unlink, cred, ks, ks->ks_label); 150 151 return (error); 152 } 153 154 int 155 mac_posixsem_check_wait(struct ucred *active_cred, struct ucred *file_cred, 156 struct ksem *ks) 157 { 158 int error; 159 160 MAC_CHECK(posixsem_check_wait, active_cred, file_cred, ks, 161 ks->ks_label); 162 163 return (error); 164 } 165