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 31 /* 32 * Test privilege associated with real time process settings. There are 33 * three relevant notions of privilege: 34 * 35 * - Privilege to set the real-time priority of the current process. 36 * - Privilege to set the real-time priority of another process. 37 * - Privilege to set the idle priority of another process. 38 * - No privilege to set the idle priority of the current process. 39 * 40 * This requires a test process and a target (dummy) process running with 41 * various uids. This test is based on the code in the setpriority() test. 42 */ 43 44 #include <sys/types.h> 45 #include <sys/rtprio.h> 46 #include <sys/wait.h> 47 48 #include <err.h> 49 #include <errno.h> 50 #include <signal.h> 51 #include <stdlib.h> 52 #include <unistd.h> 53 54 #include "main.h" 55 56 static int childproc_running; 57 static pid_t childproc; 58 59 int 60 priv_sched_rtprio_setup(int asroot, int injail, struct test *test) 61 { 62 int another_uid, need_child; 63 64 /* 65 * Some tests require a second process with specific credentials. 66 * Set that up here, and kill in cleanup. 67 */ 68 need_child = 0; 69 if (test->t_test_func == priv_sched_rtprio_aproc_normal || 70 test->t_test_func == priv_sched_rtprio_aproc_idle || 71 test->t_test_func == priv_sched_rtprio_aproc_realtime) { 72 need_child = 1; 73 another_uid = 1; 74 } 75 if (test->t_test_func == priv_sched_rtprio_myproc_normal || 76 test->t_test_func == priv_sched_rtprio_myproc_idle || 77 test->t_test_func == priv_sched_rtprio_myproc_realtime) { 78 need_child = 1; 79 } 80 81 if (need_child) { 82 childproc = fork(); 83 if (childproc < 0) { 84 warn("priv_sched_setup: fork"); 85 return (-1); 86 } 87 if (childproc == 0) { 88 if (another_uid) { 89 if (setresuid(UID_THIRD, UID_THIRD, 90 UID_THIRD) < 0) 91 err(-1, "setresuid(%d)", UID_THIRD); 92 } 93 while (1) 94 sleep(1); 95 } 96 childproc_running = 1; 97 sleep(1); /* Allow dummy thread to change uids. */ 98 } 99 return (0); 100 } 101 102 void 103 priv_sched_rtprio_curproc_normal(int asroot, int injail, struct test *test) 104 { 105 struct rtprio rtp; 106 int error; 107 108 rtp.type = RTP_PRIO_NORMAL; 109 rtp.prio = 0; 110 error = rtprio(RTP_SET, 0, &rtp); 111 if (asroot && injail) 112 expect("priv_sched_rtprio_curproc_normal(asroot, injail)", 113 error, 0, 0); 114 if (asroot && !injail) 115 expect("priv_sched_rtprio_curproc_normal(asroot, !injail)", 116 error, 0, 0); 117 if (!asroot && injail) 118 expect("priv_sched_rtprio_curproc_normal(!asroot, injail)", 119 error, 0, 0); 120 if (!asroot && !injail) 121 expect("priv_sched_rtprio_curproc_normal(!asroot, !injail)", 122 error, 0, 0); 123 } 124 125 void 126 priv_sched_rtprio_curproc_idle(int asroot, int injail, struct test *test) 127 { 128 struct rtprio rtp; 129 int error; 130 131 rtp.type = RTP_PRIO_IDLE; 132 rtp.prio = 0; 133 error = rtprio(RTP_SET, 0, &rtp); 134 if (asroot && injail) 135 expect("priv_sched_rtprio_curproc_idle(asroot, injail)", 136 error, -1, EPERM); 137 if (asroot && !injail) 138 expect("priv_sched_rtprio_curproc_idle(asroot, !injail)", 139 error, 0, 0); 140 if (!asroot && injail) 141 expect("priv_sched_rtprio_curproc_idle(!asroot, injail)", 142 error, -1, EPERM); 143 if (!asroot && !injail) 144 expect("priv_sched_rtprio_curproc_idle(!asroot, !injail)", 145 error, -1, EPERM); 146 } 147 148 void 149 priv_sched_rtprio_curproc_realtime(int asroot, int injail, struct test *test) 150 { 151 struct rtprio rtp; 152 int error; 153 154 rtp.type = RTP_PRIO_REALTIME; 155 rtp.prio = 0; 156 error = rtprio(RTP_SET, 0, &rtp); 157 if (asroot && injail) 158 expect("priv_sched_rtprio_curproc_realtime(asroot, injail)", 159 error, -1, EPERM); 160 if (asroot && !injail) 161 expect("priv_sched_rtprio_curproc_realtime(asroot, !injail)", 162 error, 0, 0); 163 if (!asroot && injail) 164 expect("priv_sched_rtprio_curproc_realtime(!asroot, injail)", 165 error, -1, EPERM); 166 if (!asroot && !injail) 167 expect("priv_sched_rtprio_curproc_realtime(!asroot, !injail)", 168 error, -1, EPERM); 169 } 170 171 void 172 priv_sched_rtprio_myproc_normal(int asroot, int injail, struct test *test) 173 { 174 struct rtprio rtp; 175 int error; 176 177 rtp.type = RTP_PRIO_NORMAL; 178 rtp.prio = 0; 179 error = rtprio(RTP_SET, 0, &rtp); 180 if (asroot && injail) 181 expect("priv_sched_rtprio_myproc_normal(asroot, injail)", 182 error, 0, 0); 183 if (asroot && !injail) 184 expect("priv_sched_rtprio_myproc_normal(asroot, !injail)", 185 error, 0, 0); 186 if (!asroot && injail) 187 expect("priv_sched_rtprio_myproc_normal(!asroot, injail)", 188 error, 0, 0); 189 if (!asroot && !injail) 190 expect("priv_sched_rtprio_myproc_normal(!asroot, !injail)", 191 error, 0, 0); 192 } 193 194 void 195 priv_sched_rtprio_myproc_idle(int asroot, int injail, struct test *test) 196 { 197 struct rtprio rtp; 198 int error; 199 200 rtp.type = RTP_PRIO_IDLE; 201 rtp.prio = 0; 202 error = rtprio(RTP_SET, 0, &rtp); 203 if (asroot && injail) 204 expect("priv_sched_rtprio_myproc_idle(asroot, injail)", 205 error, -1, EPERM); 206 if (asroot && !injail) 207 expect("priv_sched_rtprio_myproc_idle(asroot, !injail)", 208 error, 0, 0); 209 if (!asroot && injail) 210 expect("priv_sched_rtprio_myproc_idle(!asroot, injail)", 211 error, -1, EPERM); 212 if (!asroot && !injail) 213 expect("priv_sched_rtprio_myproc_idle(!asroot, !injail)", 214 error, -1, EPERM); 215 } 216 217 void 218 priv_sched_rtprio_myproc_realtime(int asroot, int injail, struct test *test) 219 { 220 struct rtprio rtp; 221 int error; 222 223 rtp.type = RTP_PRIO_REALTIME; 224 rtp.prio = 0; 225 error = rtprio(RTP_SET, 0, &rtp); 226 if (asroot && injail) 227 expect("priv_sched_rtprio_myproc_realtime(asroot, injail)", 228 error, -1, EPERM); 229 if (asroot && !injail) 230 expect("priv_sched_rtprio_myproc_realtime(asroot, !injail)", 231 error, 0, 0); 232 if (!asroot && injail) 233 expect("priv_sched_rtprio_myproc_realtime(!asroot, injail)", 234 error, -1, EPERM); 235 if (!asroot && !injail) 236 expect("priv_sched_rtprio_myproc_realtime(!asroot, !injail)", 237 error, -1, EPERM); 238 } 239 240 void 241 priv_sched_rtprio_aproc_normal(int asroot, int injail, struct test *test) 242 { 243 struct rtprio rtp; 244 int error; 245 246 rtp.type = RTP_PRIO_NORMAL; 247 rtp.prio = 0; 248 error = rtprio(RTP_SET, childproc, &rtp); 249 if (asroot && injail) 250 expect("priv_sched_rtprio_aproc_normal(asroot, injail)", 251 error, -1, ESRCH); 252 if (asroot && !injail) 253 expect("priv_sched_rtprio_aproc_normal(asroot, !injail)", 254 error, 0, 0); 255 if (!asroot && injail) 256 expect("priv_sched_rtprio_aproc_normal(!asroot, injail)", 257 error, -1, ESRCH); 258 if (!asroot && !injail) 259 expect("priv_sched_rtprio_aproc_normal(!asroot, !injail)", 260 error, -1, EPERM); 261 } 262 263 void 264 priv_sched_rtprio_aproc_idle(int asroot, int injail, struct test *test) 265 { 266 struct rtprio rtp; 267 int error; 268 269 rtp.type = RTP_PRIO_IDLE; 270 rtp.prio = 0; 271 error = rtprio(RTP_SET, childproc, &rtp); 272 if (asroot && injail) 273 expect("priv_sched_rtprio_aproc_idle(asroot, injail)", 274 error, -1, ESRCH); 275 if (asroot && !injail) 276 expect("priv_sched_rtprio_aproc_idle(asroot, !injail)", 277 error, 0, 0); 278 if (!asroot && injail) 279 expect("priv_sched_rtprio_aproc_idle(!asroot, injail)", 280 error, -1, ESRCH); 281 if (!asroot && !injail) 282 expect("priv_sched_rtprio_aroc_idle(!asroot, !injail)", 283 error, -1, EPERM); 284 } 285 286 void 287 priv_sched_rtprio_aproc_realtime(int asroot, int injail, struct test *test) 288 { 289 struct rtprio rtp; 290 int error; 291 292 rtp.type = RTP_PRIO_REALTIME; 293 rtp.prio = 0; 294 error = rtprio(RTP_SET, childproc, &rtp); 295 if (asroot && injail) 296 expect("priv_sched_rtprio_aproc_realtime(asroot, injail)", 297 error, -1, ESRCH); 298 if (asroot && !injail) 299 expect("priv_sched_rtprio_aproc_realtime(asroot, !injail)", 300 error, 0, 0); 301 if (!asroot && injail) 302 expect("priv_sched_rtprio_aproc_realtime(!asroot, injail)", 303 error, -1, ESRCH); 304 if (!asroot && !injail) 305 expect("priv_sched_rtprio_aproc_realtime(!asroot, !injail)", 306 error, -1, EPERM); 307 } 308 309 void 310 priv_sched_rtprio_cleanup(int asroot, int injail, struct test *test) 311 { 312 pid_t pid; 313 314 if (childproc_running) { 315 (void)kill(childproc, SIGKILL); 316 while (1) { 317 pid = waitpid(childproc, NULL, 0); 318 if (pid == -1) 319 warn("waitpid(%d (test), NULL, 0)", 320 childproc); 321 if (pid == childproc) 322 break; 323 } 324 childproc_running = 0; 325 childproc = -1; 326 } 327 } 328