202 lines
4.3 KiB
Bash
Executable File
202 lines
4.3 KiB
Bash
Executable File
#!/bin/sh
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#
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# Copyright (c) 2013 Peter Holm <pho@FreeBSD.org>
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# msync(2) / mlockall(2) test scenario.
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# "panic: vm_fault_copy_wired: page missing" seen.
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# http://people.freebsd.org/~pho/stress/log/msync.txt
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# Fixed in r253189.
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[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
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. ../default.cfg
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dir=/tmp
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odir=`pwd`
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cd $dir
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sed '1,/^EOF/d' < $odir/$0 > $dir/msync.c
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mycc -o msync -Wall -Wextra msync.c -lpthread || exit 1
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rm -f msync.c
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cd $odir
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/tmp/msync &
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sleep 180
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while pkill -9 msync; do :; done
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wait
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rm -f /tmp/msync
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exit
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EOF
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#include <sys/types.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <pthread.h>
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#include <pwd.h>
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#include <signal.h>
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#include <sys/mman.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <sys/syscall.h>
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#include <sys/wait.h>
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#include <unistd.h>
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int syscallno = SYS_msync;
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#define N (128 * 1024 / (int)sizeof(u_int32_t))
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u_int32_t r[N];
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static void
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hand(int i __unused) { /* handler */
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_exit(1);
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}
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unsigned long
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makearg(void)
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{
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unsigned int i;
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unsigned long val;
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val = arc4random();
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i = arc4random() % 100;
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if (i < 20)
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val = val & 0xff;
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if (i >= 20 && i < 40)
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val = val & 0xffff;
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if (i >= 40 && i < 60)
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val = (unsigned long)(r) | (val & 0xffff);
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#if defined(__LP64__)
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if (i >= 60) {
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val = (val << 32) | arc4random();
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if (i > 80)
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val = val & 0x00007fffffffffffUL;
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}
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#endif
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return(val);
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}
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void *
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calls(void *arg __unused)
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{
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int i, num;
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unsigned long arg1, arg2, arg3;
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usleep(1000);
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num = syscallno;
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for (i = 0; i < 500; i++) {
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arg1 = makearg();
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arg2 = makearg();
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#if 0
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arg3 = makearg();
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arg3 = arg3 & ~MS_INVALIDATE; /* No problem seen */
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#else
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arg3 = MS_INVALIDATE; /* panic */
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#endif
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#if 0
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fprintf(stderr, "%2d : syscall(%3d, 0x%lx, 0x%lx, 0x%lx)\n",
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i, num, arg1, arg2, arg3);
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usleep(50000);
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#endif
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alarm(1);
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syscall(num, arg1, arg2, arg3);
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num = 0;
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}
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return (0);
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}
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void
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wd(void)
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{
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int i;
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if (mlockall(MCL_CURRENT | MCL_FUTURE) != 0)
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err(1, "mlockall failed");
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for (i = 0; i < 800; i++) {
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if (fork() == 0) {
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usleep(20000);
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_exit(0);
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}
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wait(NULL);
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usleep(100000);
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}
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_exit(0);
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}
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int
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main(void)
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{
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struct passwd *pw;
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pthread_t cp[50];
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int e, i, j;
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if (fork() == 0)
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wd();
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if ((pw = getpwnam("nobody")) == NULL)
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err(1, "no such user: nobody");
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if (setgroups(1, &pw->pw_gid) ||
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setegid(pw->pw_gid) || setgid(pw->pw_gid) ||
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seteuid(pw->pw_uid) || setuid(pw->pw_uid))
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err(1, "Can't drop privileges to \"nobody\"");
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endpwent();
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signal(SIGALRM, hand);
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signal(SIGILL, hand);
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signal(SIGFPE, hand);
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signal(SIGSEGV, hand);
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signal(SIGBUS, hand);
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signal(SIGURG, hand);
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signal(SIGSYS, hand);
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signal(SIGTRAP, hand);
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alarm(180);
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for (i = 0; i < 8000; i++) {
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if (fork() == 0) {
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for (j = 0; j < N; j++)
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r[j] = arc4random();
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for (j = 0; j < 50; j++)
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if ((e = pthread_create(&cp[j], NULL, calls, NULL)) != 0)
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errc(1, e, "pthread_create");
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for (j = 0; j < 50; j++)
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pthread_join(cp[j], NULL);
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_exit(0);
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}
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wait(NULL);
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}
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return (0);
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}
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