1 /*- 2 * Copyright (c) 2002, 2003 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/module.h> 42 #include <sys/mutex.h> 43 #include <sys/systm.h> 44 #include <sys/vnode.h> 45 #include <sys/sysctl.h> 46 47 #include <security/mac/mac_framework.h> 48 #include <security/mac/mac_internal.h> 49 #include <security/mac/mac_policy.h> 50 51 /* 52 * XXXRW: Some of these checks now duplicate privilege checks. However, 53 * others provide additional security context that may be useful to policies. 54 * We need to review these and remove ones that are pure duplicates. 55 */ 56 57 int 58 mac_check_kenv_dump(struct ucred *cred) 59 { 60 int error; 61 62 MAC_CHECK(check_kenv_dump, cred); 63 64 return (error); 65 } 66 67 int 68 mac_check_kenv_get(struct ucred *cred, char *name) 69 { 70 int error; 71 72 MAC_CHECK(check_kenv_get, cred, name); 73 74 return (error); 75 } 76 77 int 78 mac_check_kenv_set(struct ucred *cred, char *name, char *value) 79 { 80 int error; 81 82 MAC_CHECK(check_kenv_set, cred, name, value); 83 84 return (error); 85 } 86 87 int 88 mac_check_kenv_unset(struct ucred *cred, char *name) 89 { 90 int error; 91 92 MAC_CHECK(check_kenv_unset, cred, name); 93 94 return (error); 95 } 96 97 int 98 mac_check_kld_load(struct ucred *cred, struct vnode *vp) 99 { 100 int error; 101 102 ASSERT_VOP_LOCKED(vp, "mac_check_kld_load"); 103 104 MAC_CHECK(check_kld_load, cred, vp, vp->v_label); 105 106 return (error); 107 } 108 109 int 110 mac_check_kld_stat(struct ucred *cred) 111 { 112 int error; 113 114 MAC_CHECK(check_kld_stat, cred); 115 116 return (error); 117 } 118 119 int 120 mac_check_kld_unload(struct ucred *cred) 121 { 122 int error; 123 124 MAC_CHECK(check_kld_unload, cred); 125 126 return (error); 127 } 128 129 int 130 mac_check_sysarch_ioperm(struct ucred *cred) 131 { 132 int error; 133 134 MAC_CHECK(check_sysarch_ioperm, cred); 135 return (error); 136 } 137 138 int 139 mac_check_system_acct(struct ucred *cred, struct vnode *vp) 140 { 141 int error; 142 143 if (vp != NULL) { 144 ASSERT_VOP_LOCKED(vp, "mac_check_system_acct"); 145 } 146 147 MAC_CHECK(check_system_acct, cred, vp, 148 vp != NULL ? vp->v_label : NULL); 149 150 return (error); 151 } 152 153 int 154 mac_check_system_nfsd(struct ucred *cred) 155 { 156 int error; 157 158 MAC_CHECK(check_system_nfsd, cred); 159 160 return (error); 161 } 162 163 int 164 mac_check_system_reboot(struct ucred *cred, int howto) 165 { 166 int error; 167 168 MAC_CHECK(check_system_reboot, cred, howto); 169 170 return (error); 171 } 172 173 int 174 mac_check_system_settime(struct ucred *cred) 175 { 176 int error; 177 178 MAC_CHECK(check_system_settime, cred); 179 180 return (error); 181 } 182 183 int 184 mac_check_system_swapon(struct ucred *cred, struct vnode *vp) 185 { 186 int error; 187 188 ASSERT_VOP_LOCKED(vp, "mac_check_system_swapon"); 189 190 MAC_CHECK(check_system_swapon, cred, vp, vp->v_label); 191 return (error); 192 } 193 194 int 195 mac_check_system_swapoff(struct ucred *cred, struct vnode *vp) 196 { 197 int error; 198 199 ASSERT_VOP_LOCKED(vp, "mac_check_system_swapoff"); 200 201 MAC_CHECK(check_system_swapoff, cred, vp, vp->v_label); 202 return (error); 203 } 204 205 int 206 mac_check_system_sysctl(struct ucred *cred, struct sysctl_oid *oidp, void *arg1, 207 int arg2, struct sysctl_req *req) 208 { 209 int error; 210 211 /* 212 * XXXMAC: We would very much like to assert the SYSCTL_LOCK here, 213 * but since it's not exported from kern_sysctl.c, we can't. 214 */ 215 MAC_CHECK(check_system_sysctl, cred, oidp, arg1, arg2, req); 216 217 return (error); 218 } 219