1#!/bin/sh 2 3# 4# Copyright (c) 2011-2013 Peter Holm 5# All rights reserved. 6# 7# Redistribution and use in source and binary forms, with or without 8# modification, are permitted provided that the following conditions 9# are met: 10# 1. Redistributions of source code must retain the above copyright 11# notice, this list of conditions and the following disclaimer. 12# 2. Redistributions in binary form must reproduce the above copyright 13# notice, this list of conditions and the following disclaimer in the 14# documentation and/or other materials provided with the distribution. 15# 16# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26# SUCH DAMAGE. 27# 28 29# Threaded syscall(2) fuzz test inspired by the iknowthis test suite 30# by Tavis Ormandy <taviso cmpxchg8b com> 31 32# Usage: syscall4.sh [syscall number] 33# Without an argument random syscall numbers are tested. 34# With an argument only the specified syscall number is tested. 35 36# Sample problems found: 37# Thread stuck in stopprof. 38# http://people.freebsd.org/~pho/stress/log/kostik732.txt 39# Fixed by r275121. 40 41# panic: td 0xcbe1ac40 is not suspended. 42# https://people.freebsd.org/~pho/stress/log/kostik807.txt 43# Fixed by r282944. 44 45[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 46 47. ../default.cfg 48 49odir=`pwd` 50cd /tmp 51sed '1,/^EOF/d' < $odir/$0 > syscall4.c 52sed -i '' -e "s#MNTPOINT#$mntpoint#" syscall4.c 53rm -f /tmp/syscall4 54mycc -o syscall4 -Wall -Wextra -O2 -g syscall4.c -lpthread || exit 1 55rm -f syscall4.c 56 57kldstat -v | grep -q sysvmsg || $stress2tools/kldload.sh sysvmsg 58kldstat -v | grep -q sysvsem || $stress2tools/kldload.sh sysvsem 59kldstat -v | grep -q sysvshm || $stress2tools/kldload.sh sysvshm 60kldstat -v | grep -q aio || $stress2tools/kldload.sh aio 61kldstat -v | grep -q mqueuefs || $stress2tools/kldload.sh mqueuefs 62 63mount | grep -q "on $mntpoint " && umount -f $mntpoint 64[ -c /dev/md$mdstart ] && mdconfig -d -u $mdstart 65 66mdconfig -a -t swap -s 2g -u $mdstart || exit 1 67bsdlabel -w md$mdstart auto 68newfs $newfs_flags -n md${mdstart}$part > /dev/null 69mount /dev/md${mdstart}$part $mntpoint 70chmod 777 $mntpoint 71 72[ -z "$noswap" ] && 73 daemon sh -c "(cd $odir/../testcases/swap; ./swap -t 10m -i 20 -k)" > \ 74 /dev/null 75sleeptime=${sleeptime:-12} 76st=`date '+%s'` 77while [ $((`date '+%s'` - st)) -lt $((10 * sleeptime)) ]; do 78 (cd $mntpoint; /tmp/syscall4 $* 1>>stdout 2>>stderr) & 79 start=`date '+%s'` 80 while [ $((`date '+%s'` - start)) -lt $sleeptime ]; do 81 pgrep syscall4 > /dev/null || break 82 sleep .5 83 done 84 while pkill -9 syscall4; do :; done 85 wait 86 ipcs | grep nobody | awk '/^(q|m|s)/ {print " -" $1, $2}' | 87 xargs -L 1 ipcrm 88done 89while pkill -9 swap; do :; done 90while pkill -9 syscall4; do :; done 91 92for i in `jot 10`; do 93 mount | grep -q md${mdstart}$part && \ 94 umount $mntpoint && mdconfig -d -u $mdstart && break 95 sleep 10 96done 97if mount | grep -q md${mdstart}$part; then 98 fstat $mntpoint 99 echo "umount $mntpoint failed" 100 exit 1 101fi 102rm -f /tmp/syscall4 103exit 0 104EOF 105#include <sys/types.h> 106#include <sys/event.h> 107#include <sys/resource.h> 108#include <sys/socket.h> 109#include <sys/stat.h> 110#include <sys/syscall.h> 111#include <sys/wait.h> 112 113#include <err.h> 114#include <errno.h> 115#include <fcntl.h> 116#include <fts.h> 117#include <libutil.h> 118#include <pthread.h> 119#if defined(__FreeBSD__) 120#include <pthread_np.h> 121#define __NP__ 122#endif 123#include <pwd.h> 124#include <signal.h> 125#include <stdint.h> 126#include <stdio.h> 127#include <stdlib.h> 128#include <string.h> 129#include <unistd.h> 130 131static int ignore[] = { 132 SYS_syscall, 133 SYS_exit, 134 SYS_fork, 135 11, /* 11 is obsolete execv */ 136 SYS_reboot, 137 SYS_vfork, 138 109, /* 109 is old sigblock */ 139 111, /* 111 is old sigsuspend */ 140 SYS_shutdown, 141 SYS___syscall, 142 216, /* custom syscall */ 143 SYS_rfork, 144 SYS_mac_syscall, 145}; 146 147static int fd[900], fds[2], kq, socketpr[2]; 148#ifndef nitems 149#define nitems(x) (sizeof((x)) / sizeof((x)[0])) 150#endif 151#define N 4096 152#define MAGIC 1664 153#define RUNTIME 120 154#define THREADS 50 155 156static uint32_t r[N]; 157static int magic1, syscallno, magic2; 158 159static int 160random_int(int mi, int ma) 161{ 162 return (arc4random() % (ma - mi + 1) + mi); 163} 164 165static void 166hand(int i __unused) { /* handler */ 167 exit(1); 168} 169 170static unsigned long 171makearg(void) 172{ 173 unsigned int i; 174 unsigned long val; 175 176 val = arc4random(); 177 i = arc4random() % 100; 178 if (i < 20) 179 val = val & 0xff; 180 if (i >= 20 && i < 40) 181 val = val & 0xffff; 182 if (i >= 40 && i < 60) 183 val = (unsigned long)(r) | (val & 0xffff); 184#if defined(__LP64__) 185 if (i >= 60) { 186 val = (val << 32) | arc4random(); 187 if (i > 80) 188 val = val & 0x00007fffffffffffUL; 189 } 190#endif 191 192 return(val); 193} 194 195static void * 196test(void *arg __unused) 197{ 198 FTS *fts; 199 FTSENT *p; 200 time_t start; 201 int ftsoptions, i, numfiles; 202 char *args[] = { 203 "/dev", 204 "/proc", 205 "MNTPOINT", 206 "mnt2", 207 ".", 208 NULL, 209 }; 210 211#ifdef __NP__ 212 pthread_set_name_np(pthread_self(), __func__); 213#endif 214 numfiles = 0; 215 ftsoptions = FTS_PHYSICAL; 216 start = time(NULL); 217 while (time(NULL) - start < 2) { 218 for (i = 0; i < N; i++) 219 r[i] = arc4random(); 220 221 if (pipe(fds) == -1) 222 err(1, "pipe()"); 223 if (socketpair(PF_UNIX, SOCK_SEQPACKET, 0, socketpr) == -1) 224 err(1, "socketpair()"); 225 kq = kqueue(); 226 227 if ((fts = fts_open(args, ftsoptions, NULL)) == NULL) 228 err(1, "fts_open"); 229 230 i = 0; 231 while ((p = fts_read(fts)) != NULL) { 232 if (fd[i] > 0) 233 close(fd[i]); 234 if ((fd[i] = open(p->fts_path, O_RDWR)) == -1) 235 if ((fd[i] = open(p->fts_path, O_WRONLY)) == 236 -1) 237 if ((fd[i] = open(p->fts_path, 238 O_RDONLY)) == -1) 239 continue; 240 i++; 241 i = i % nitems(fd); 242 if (numfiles++ < 10) { 243 fprintf(stderr, "%d: pts_path = %s\n", 244 numfiles, p->fts_path); 245 } 246 } 247 248 if (fts_close(fts) == -1) 249 warn("fts_close()"); 250 sleep(1); 251 close(socketpr[0]); 252 close(socketpr[1]); 253 close(fds[0]); 254 close(fds[1]); 255 close(kq); 256 } 257 return(NULL); 258} 259 260static void * 261calls(void *arg __unused) 262{ 263 time_t start; 264 int i, j, num; 265 unsigned long arg1, arg2, arg3, arg4, arg5, arg6, arg7; 266 267#ifdef __NP__ 268 pthread_set_name_np(pthread_self(), __func__); 269#endif 270 start = time(NULL); 271 for (i = 0; time(NULL) - start < 10; i++) { 272 num = syscallno; 273 while (num == 0) { 274 num = random_int(0, SYS_MAXSYSCALL); 275 for (j = 0; j < (int)nitems(ignore); j++) 276 if (num == ignore[j]) { 277 num = 0; 278 break; 279 } 280 } 281 arg1 = makearg(); 282 arg2 = makearg(); 283 arg3 = makearg(); 284 arg4 = makearg(); 285 arg5 = makearg(); 286 arg6 = makearg(); 287 arg7 = makearg(); 288 289#if 0 /* Debug mode */ 290 fprintf(stderr, "%2d : syscall(%3d, %lx, %lx, %lx, %lx, %lx," 291 " %lx, %lx)\n", 292 i, num, arg1, arg2, arg3, arg4, arg5, arg6, arg7); 293 sleep(2); 294#endif 295 alarm(1); 296 syscall(num, arg1, arg2, arg3, arg4, arg5, arg6, arg7); 297 num = 0; 298 if (magic1 != MAGIC || magic2 != MAGIC) 299 exit(1); 300 } 301 302 return (NULL); 303} 304 305int 306main(int argc, char **argv) 307{ 308 struct passwd *pw; 309 struct rlimit limit; 310 pthread_t rp, cp[THREADS]; 311 time_t start; 312 int e, j; 313 314 magic1 = magic2 = MAGIC; 315 if ((pw = getpwnam("nobody")) == NULL) 316 err(1, "failed to resolve nobody"); 317 318 if (getenv("USE_ROOT") && argc == 2) 319 fprintf(stderr, "Running syscall4 as root for %s.\n", 320 argv[1]); 321 else { 322 if (setgroups(1, &pw->pw_gid) || 323 setegid(pw->pw_gid) || setgid(pw->pw_gid) || 324 seteuid(pw->pw_uid) || setuid(pw->pw_uid)) 325 err(1, "Can't drop privileges to \"nobody\""); 326 endpwent(); 327 } 328 329 limit.rlim_cur = limit.rlim_max = 1000; 330#if defined(RLIMIT_NPTS) 331 if (setrlimit(RLIMIT_NPTS, &limit) < 0) 332 err(1, "setrlimit"); 333#endif 334 335 signal(SIGALRM, hand); 336 signal(SIGILL, hand); 337 signal(SIGFPE, hand); 338 signal(SIGSEGV, hand); 339 signal(SIGBUS, hand); 340 signal(SIGURG, hand); 341 signal(SIGSYS, hand); 342 signal(SIGTRAP, hand); 343 344 if (argc > 2) { 345 fprintf(stderr, "usage: %s [syscall-num]\n", argv[0]); 346 exit(1); 347 } 348 if (argc == 2) { 349 syscallno = atoi(argv[1]); 350 for (j = 0; j < (int)nitems(ignore); j++) 351 if (syscallno == ignore[j]) 352 errx(0, "syscall #%d is on the ignore list.", 353 syscallno); 354 } 355 356 if (daemon(1, 1) == -1) 357 err(1, "daemon()"); 358 359 system("touch aaa bbb ccc; mkdir -p ddd"); 360 start = time(NULL); 361 while ((time(NULL) - start) < RUNTIME) { 362 if (fork() == 0) { 363 if ((e = pthread_create(&rp, NULL, test, NULL)) != 0) 364 errc(1, e, "pthread_create"); 365 usleep(1000); 366 for (j = 0; j < THREADS; j++) 367 if ((e = pthread_create(&cp[j], NULL, calls, 368 NULL)) != 0) 369 errc(1, e, "pthread_create"); 370 for (j = 0; j < THREADS; j++) 371 pthread_join(cp[j], NULL); 372 373 if ((e = pthread_kill(rp, SIGINT)) != 0) 374 errc(1, e, "pthread_kill"); 375 exit(0); 376 } 377 wait(NULL); 378 usleep(10000); 379 } 380 381 return (0); 382} 383