1 /*- 2 * Copyright (c) 2002-2003 Networks Associates Technology, Inc. 3 * Copyright (c) 2006 SPARTA, Inc. 4 * All rights reserved. 5 * 6 * This software was developed for the FreeBSD Project in part by Network 7 * Associates Laboratories, the Security Research Division of Network 8 * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), 9 * as part of the DARPA CHATS research program. 10 * 11 * This software was enhanced by SPARTA ISSO under SPAWAR contract 12 * N66001-04-C-6019 ("SEFOS"). 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD$"); 38 39 #include "opt_mac.h" 40 41 #include <sys/param.h> 42 #include <sys/kernel.h> 43 #include <sys/lock.h> 44 #include <sys/malloc.h> 45 #include <sys/module.h> 46 #include <sys/mutex.h> 47 #include <sys/sbuf.h> 48 #include <sys/systm.h> 49 #include <sys/vnode.h> 50 #include <sys/pipe.h> 51 #include <sys/sysctl.h> 52 53 #include <security/mac/mac_framework.h> 54 #include <security/mac/mac_internal.h> 55 #include <security/mac/mac_policy.h> 56 57 struct label * 58 mac_pipe_label_alloc(void) 59 { 60 struct label *label; 61 62 label = mac_labelzone_alloc(M_WAITOK); 63 MAC_PERFORM(pipe_init_label, label); 64 return (label); 65 } 66 67 void 68 mac_pipe_init(struct pipepair *pp) 69 { 70 71 pp->pp_label = mac_pipe_label_alloc(); 72 } 73 74 void 75 mac_pipe_label_free(struct label *label) 76 { 77 78 MAC_PERFORM(pipe_destroy_label, label); 79 mac_labelzone_free(label); 80 } 81 82 void 83 mac_pipe_destroy(struct pipepair *pp) 84 { 85 86 mac_pipe_label_free(pp->pp_label); 87 pp->pp_label = NULL; 88 } 89 90 void 91 mac_pipe_copy_label(struct label *src, struct label *dest) 92 { 93 94 MAC_PERFORM(pipe_copy_label, src, dest); 95 } 96 97 int 98 mac_pipe_externalize_label(struct label *label, char *elements, 99 char *outbuf, size_t outbuflen) 100 { 101 int error; 102 103 MAC_EXTERNALIZE(pipe, label, elements, outbuf, outbuflen); 104 105 return (error); 106 } 107 108 int 109 mac_pipe_internalize_label(struct label *label, char *string) 110 { 111 int error; 112 113 MAC_INTERNALIZE(pipe, label, string); 114 115 return (error); 116 } 117 118 void 119 mac_pipe_create(struct ucred *cred, struct pipepair *pp) 120 { 121 122 MAC_PERFORM(pipe_create, cred, pp, pp->pp_label); 123 } 124 125 static void 126 mac_pipe_relabel(struct ucred *cred, struct pipepair *pp, 127 struct label *newlabel) 128 { 129 130 MAC_PERFORM(pipe_relabel, cred, pp, pp->pp_label, newlabel); 131 } 132 133 int 134 mac_pipe_check_ioctl(struct ucred *cred, struct pipepair *pp, 135 unsigned long cmd, void *data) 136 { 137 int error; 138 139 mtx_assert(&pp->pp_mtx, MA_OWNED); 140 141 MAC_CHECK(pipe_check_ioctl, cred, pp, pp->pp_label, cmd, data); 142 143 return (error); 144 } 145 146 int 147 mac_pipe_check_poll(struct ucred *cred, struct pipepair *pp) 148 { 149 int error; 150 151 mtx_assert(&pp->pp_mtx, MA_OWNED); 152 153 MAC_CHECK(pipe_check_poll, cred, pp, pp->pp_label); 154 155 return (error); 156 } 157 158 int 159 mac_pipe_check_read(struct ucred *cred, struct pipepair *pp) 160 { 161 int error; 162 163 mtx_assert(&pp->pp_mtx, MA_OWNED); 164 165 MAC_CHECK(pipe_check_read, cred, pp, pp->pp_label); 166 167 return (error); 168 } 169 170 static int 171 mac_pipe_check_relabel(struct ucred *cred, struct pipepair *pp, 172 struct label *newlabel) 173 { 174 int error; 175 176 mtx_assert(&pp->pp_mtx, MA_OWNED); 177 178 MAC_CHECK(pipe_check_relabel, cred, pp, pp->pp_label, newlabel); 179 180 return (error); 181 } 182 183 int 184 mac_pipe_check_stat(struct ucred *cred, struct pipepair *pp) 185 { 186 int error; 187 188 mtx_assert(&pp->pp_mtx, MA_OWNED); 189 190 MAC_CHECK(pipe_check_stat, cred, pp, pp->pp_label); 191 192 return (error); 193 } 194 195 int 196 mac_pipe_check_write(struct ucred *cred, struct pipepair *pp) 197 { 198 int error; 199 200 mtx_assert(&pp->pp_mtx, MA_OWNED); 201 202 MAC_CHECK(pipe_check_write, cred, pp, pp->pp_label); 203 204 return (error); 205 } 206 207 int 208 mac_pipe_label_set(struct ucred *cred, struct pipepair *pp, 209 struct label *label) 210 { 211 int error; 212 213 mtx_assert(&pp->pp_mtx, MA_OWNED); 214 215 error = mac_pipe_check_relabel(cred, pp, label); 216 if (error) 217 return (error); 218 219 mac_pipe_relabel(cred, pp, label); 220 221 return (0); 222 } 223