1 /*- 2 * Copyright (c) 2006 nCircle Network Security, Inc. 3 * Copyright (c) 2007 Robert N. M. Watson 4 * All rights reserved. 5 * 6 * This software was developed by Robert N. M. Watson for the TrustedBSD 7 * Project under contract to nCircle Network Security, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR, NCIRCLE NETWORK SECURITY, 22 * INC., OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 24 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 25 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 26 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 27 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 28 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 * 30 * $FreeBSD$ 31 */ 32 33 /* 34 * Test privilege associated with real time process settings. There are 35 * three relevant notions of privilege: 36 * 37 * - Privilege to set the real-time priority of the current process. 38 * - Privilege to set the real-time priority of another process. 39 * - Privilege to set the idle priority of another process. 40 * - No privilege to set the idle priority of the current process. 41 * 42 * This requires a test process and a target (dummy) process running with 43 * various uids. This test is based on the code in the setpriority() test. 44 */ 45 46 #include <sys/types.h> 47 #include <sys/rtprio.h> 48 #include <sys/wait.h> 49 50 #include <err.h> 51 #include <errno.h> 52 #include <signal.h> 53 #include <stdlib.h> 54 #include <unistd.h> 55 56 #include "main.h" 57 58 static int childproc_running; 59 static pid_t childproc; 60 61 int 62 priv_sched_rtprio_setup(int asroot, int injail, struct test *test) 63 { 64 int another_uid, need_child; 65 66 /* 67 * Some tests require a second process with specific credentials. 68 * Set that up here, and kill in cleanup. 69 */ 70 need_child = 0; 71 if (test->t_test_func == priv_sched_rtprio_aproc_normal || 72 test->t_test_func == priv_sched_rtprio_aproc_idle || 73 test->t_test_func == priv_sched_rtprio_aproc_realtime) { 74 need_child = 1; 75 another_uid = 1; 76 } 77 if (test->t_test_func == priv_sched_rtprio_myproc_normal || 78 test->t_test_func == priv_sched_rtprio_myproc_idle || 79 test->t_test_func == priv_sched_rtprio_myproc_realtime) { 80 need_child = 1; 81 } 82 83 if (need_child) { 84 childproc = fork(); 85 if (childproc < 0) { 86 warn("priv_sched_setup: fork"); 87 return (-1); 88 } 89 if (childproc == 0) { 90 if (another_uid) { 91 if (setresuid(UID_THIRD, UID_THIRD, 92 UID_THIRD) < 0) 93 err(-1, "setresuid(%d)", UID_THIRD); 94 } 95 while (1) 96 sleep(1); 97 } 98 childproc_running = 1; 99 sleep(1); /* Allow dummy thread to change uids. */ 100 } 101 return (0); 102 } 103 104 void 105 priv_sched_rtprio_curproc_normal(int asroot, int injail, struct test *test) 106 { 107 struct rtprio rtp; 108 int error; 109 110 rtp.type = RTP_PRIO_NORMAL; 111 rtp.prio = 0; 112 error = rtprio(RTP_SET, 0, &rtp); 113 if (asroot && injail) 114 expect("priv_sched_rtprio_curproc_normal(asroot, injail)", 115 error, 0, 0); 116 if (asroot && !injail) 117 expect("priv_sched_rtprio_curproc_normal(asroot, !injail)", 118 error, 0, 0); 119 if (!asroot && injail) 120 expect("priv_sched_rtprio_curproc_normal(!asroot, injail)", 121 error, 0, 0); 122 if (!asroot && !injail) 123 expect("priv_sched_rtprio_curproc_normal(!asroot, !injail)", 124 error, 0, 0); 125 } 126 127 void 128 priv_sched_rtprio_curproc_idle(int asroot, int injail, struct test *test) 129 { 130 struct rtprio rtp; 131 int error; 132 133 rtp.type = RTP_PRIO_IDLE; 134 rtp.prio = 0; 135 error = rtprio(RTP_SET, 0, &rtp); 136 if (asroot && injail) 137 expect("priv_sched_rtprio_curproc_idle(asroot, injail)", 138 error, -1, EPERM); 139 if (asroot && !injail) 140 expect("priv_sched_rtprio_curproc_idle(asroot, !injail)", 141 error, 0, 0); 142 if (!asroot && injail) 143 expect("priv_sched_rtprio_curproc_idle(!asroot, injail)", 144 error, -1, EPERM); 145 if (!asroot && !injail) 146 expect("priv_sched_rtprio_curproc_idle(!asroot, !injail)", 147 error, -1, EPERM); 148 } 149 150 void 151 priv_sched_rtprio_curproc_realtime(int asroot, int injail, struct test *test) 152 { 153 struct rtprio rtp; 154 int error; 155 156 rtp.type = RTP_PRIO_REALTIME; 157 rtp.prio = 0; 158 error = rtprio(RTP_SET, 0, &rtp); 159 if (asroot && injail) 160 expect("priv_sched_rtprio_curproc_realtime(asroot, injail)", 161 error, -1, EPERM); 162 if (asroot && !injail) 163 expect("priv_sched_rtprio_curproc_realtime(asroot, !injail)", 164 error, 0, 0); 165 if (!asroot && injail) 166 expect("priv_sched_rtprio_curproc_realtime(!asroot, injail)", 167 error, -1, EPERM); 168 if (!asroot && !injail) 169 expect("priv_sched_rtprio_curproc_realtime(!asroot, !injail)", 170 error, -1, EPERM); 171 } 172 173 void 174 priv_sched_rtprio_myproc_normal(int asroot, int injail, struct test *test) 175 { 176 struct rtprio rtp; 177 int error; 178 179 rtp.type = RTP_PRIO_NORMAL; 180 rtp.prio = 0; 181 error = rtprio(RTP_SET, 0, &rtp); 182 if (asroot && injail) 183 expect("priv_sched_rtprio_myproc_normal(asroot, injail)", 184 error, 0, 0); 185 if (asroot && !injail) 186 expect("priv_sched_rtprio_myproc_normal(asroot, !injail)", 187 error, 0, 0); 188 if (!asroot && injail) 189 expect("priv_sched_rtprio_myproc_normal(!asroot, injail)", 190 error, 0, 0); 191 if (!asroot && !injail) 192 expect("priv_sched_rtprio_myproc_normal(!asroot, !injail)", 193 error, 0, 0); 194 } 195 196 void 197 priv_sched_rtprio_myproc_idle(int asroot, int injail, struct test *test) 198 { 199 struct rtprio rtp; 200 int error; 201 202 rtp.type = RTP_PRIO_IDLE; 203 rtp.prio = 0; 204 error = rtprio(RTP_SET, 0, &rtp); 205 if (asroot && injail) 206 expect("priv_sched_rtprio_myproc_idle(asroot, injail)", 207 error, -1, EPERM); 208 if (asroot && !injail) 209 expect("priv_sched_rtprio_myproc_idle(asroot, !injail)", 210 error, 0, 0); 211 if (!asroot && injail) 212 expect("priv_sched_rtprio_myproc_idle(!asroot, injail)", 213 error, -1, EPERM); 214 if (!asroot && !injail) 215 expect("priv_sched_rtprio_myproc_idle(!asroot, !injail)", 216 error, -1, EPERM); 217 } 218 219 void 220 priv_sched_rtprio_myproc_realtime(int asroot, int injail, struct test *test) 221 { 222 struct rtprio rtp; 223 int error; 224 225 rtp.type = RTP_PRIO_REALTIME; 226 rtp.prio = 0; 227 error = rtprio(RTP_SET, 0, &rtp); 228 if (asroot && injail) 229 expect("priv_sched_rtprio_myproc_realtime(asroot, injail)", 230 error, -1, EPERM); 231 if (asroot && !injail) 232 expect("priv_sched_rtprio_myproc_realtime(asroot, !injail)", 233 error, 0, 0); 234 if (!asroot && injail) 235 expect("priv_sched_rtprio_myproc_realtime(!asroot, injail)", 236 error, -1, EPERM); 237 if (!asroot && !injail) 238 expect("priv_sched_rtprio_myproc_realtime(!asroot, !injail)", 239 error, -1, EPERM); 240 } 241 242 void 243 priv_sched_rtprio_aproc_normal(int asroot, int injail, struct test *test) 244 { 245 struct rtprio rtp; 246 int error; 247 248 rtp.type = RTP_PRIO_NORMAL; 249 rtp.prio = 0; 250 error = rtprio(RTP_SET, childproc, &rtp); 251 if (asroot && injail) 252 expect("priv_sched_rtprio_aproc_normal(asroot, injail)", 253 error, -1, ESRCH); 254 if (asroot && !injail) 255 expect("priv_sched_rtprio_aproc_normal(asroot, !injail)", 256 error, 0, 0); 257 if (!asroot && injail) 258 expect("priv_sched_rtprio_aproc_normal(!asroot, injail)", 259 error, -1, ESRCH); 260 if (!asroot && !injail) 261 expect("priv_sched_rtprio_aproc_normal(!asroot, !injail)", 262 error, -1, EPERM); 263 } 264 265 void 266 priv_sched_rtprio_aproc_idle(int asroot, int injail, struct test *test) 267 { 268 struct rtprio rtp; 269 int error; 270 271 rtp.type = RTP_PRIO_IDLE; 272 rtp.prio = 0; 273 error = rtprio(RTP_SET, childproc, &rtp); 274 if (asroot && injail) 275 expect("priv_sched_rtprio_aproc_idle(asroot, injail)", 276 error, -1, ESRCH); 277 if (asroot && !injail) 278 expect("priv_sched_rtprio_aproc_idle(asroot, !injail)", 279 error, 0, 0); 280 if (!asroot && injail) 281 expect("priv_sched_rtprio_aproc_idle(!asroot, injail)", 282 error, -1, ESRCH); 283 if (!asroot && !injail) 284 expect("priv_sched_rtprio_aroc_idle(!asroot, !injail)", 285 error, -1, EPERM); 286 } 287 288 void 289 priv_sched_rtprio_aproc_realtime(int asroot, int injail, struct test *test) 290 { 291 struct rtprio rtp; 292 int error; 293 294 rtp.type = RTP_PRIO_REALTIME; 295 rtp.prio = 0; 296 error = rtprio(RTP_SET, childproc, &rtp); 297 if (asroot && injail) 298 expect("priv_sched_rtprio_aproc_realtime(asroot, injail)", 299 error, -1, ESRCH); 300 if (asroot && !injail) 301 expect("priv_sched_rtprio_aproc_realtime(asroot, !injail)", 302 error, 0, 0); 303 if (!asroot && injail) 304 expect("priv_sched_rtprio_aproc_realtime(!asroot, injail)", 305 error, -1, ESRCH); 306 if (!asroot && !injail) 307 expect("priv_sched_rtprio_aproc_realtime(!asroot, !injail)", 308 error, -1, EPERM); 309 } 310 311 void 312 priv_sched_rtprio_cleanup(int asroot, int injail, struct test *test) 313 { 314 pid_t pid; 315 316 if (childproc_running) { 317 (void)kill(childproc, SIGKILL); 318 while (1) { 319 pid = waitpid(childproc, NULL, 0); 320 if (pid == -1) 321 warn("waitpid(%d (test), NULL, 0)", 322 childproc); 323 if (pid == childproc) 324 break; 325 } 326 childproc_running = 0; 327 childproc = -1; 328 } 329 } 330