154 lines
3.7 KiB
Bash
Executable File
154 lines
3.7 KiB
Bash
Executable File
#!/bin/sh
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#
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# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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#
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# Copyright (c) 2019 Dell EMC Isilon
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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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# Regression test for https://reviews.freebsd.org/D20800
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# "Use a consistent snapshot of the fd's rights in fget_mmap()"
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# https://people.freebsd.org/~pho/stress/log/mmap37.txt
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# Reported by syzbot+ae359438769fda1840f8@syzkaller.appspotmail.com
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# Test scenario suggestion by markj@
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# Fixed by r349547
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. ../default.cfg
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odir=`pwd`
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cd /tmp
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sed '1,/^EOF/d' < $odir/$0 > mmap37.c
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mycc -o mmap37 -Wall -Wextra -O0 mmap37.c -lpthread || exit 1
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rm -f mmap37.c
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set -e
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mount | grep "on $mntpoint " | grep -q /dev/md && umount -f $mntpoint
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[ -c /dev/md$mdstart ] && mdconfig -d -u $mdstart
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mdconfig -a -t swap -s 2g -u $mdstart
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newfs $newfs_flags md$mdstart > /dev/null
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mount /dev/md$mdstart $mntpoint
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set +e
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cd $mntpoint
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/tmp/mmap37
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cd $odir
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for i in `jot 6`; do
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mount | grep -q "on $mntpoint " || break
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umount $mntpoint && break || sleep 10
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[ $i -eq 6 ] &&
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{ echo FATAL; fstat -mf $mntpoint; exit 1; }
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done
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mdconfig -d -u $mdstart
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rm -f /tmp/mmap37
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exit
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EOF
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#include <sys/types.h>
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#include <sys/mman.h>
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#include <sys/param.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 <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <unistd.h>
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#define THREADS 2
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#define SIZ 0x06400000U /* 100 Mb */
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static volatile int go;
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static char path[128];
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void *
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thr(void *arg)
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{
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size_t len;
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void *p;
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int fd;
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fd = 0;
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len = SIZ;
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if (*(int *)arg == 0) {
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while (go == 1) {
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if ((fd = open(path, 2)) == -1)
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err(1,"open()");
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p = mmap(NULL, len, PROT_READ | PROT_WRITE,
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MAP_SHARED, fd, 0);
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munmap(p, len);
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close(fd);
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usleep(10);
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}
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} else {
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while (go == 1) {
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close(fd);
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usleep(10);
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}
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}
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return (0);
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}
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int
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main(void)
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{
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pthread_t threads[THREADS];
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size_t len;
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int nr[THREADS];
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int i, fd, r;
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sprintf(path, "mmap37.%06d", getpid());
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if ((fd = open(path, O_CREAT | O_TRUNC | O_RDWR, 0622)) == -1)
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err(1,"open()");
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len = SIZ;
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if (ftruncate(fd, len) == -1)
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err(1, "ftruncate");
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close(fd);
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go = 1;
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for (i = 0; i < THREADS; i++) {
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nr[i] = i;
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if ((r = pthread_create(&threads[i], NULL, thr,
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(void *)&nr[i])) != 0)
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errc(1, r, "pthread_create()");
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}
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sleep(30);
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go = 0;
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for (i = 0; i < THREADS; i++) {
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if ((r = pthread_join(threads[i], NULL)) != 0)
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errc(1, r, "pthread_join(%d)", i);
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}
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if (unlink(path) == -1)
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err(1, "unlink(%s)", path);
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return (0);
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}
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