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#!/bin/sh
#
# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
#
# Copyright (c) 2019 Dell EMC Isilon
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# No problems seen.
# Test scenario inspired by:
# syzbot+6532e9aab8911f58beeb@syzkaller.appspotmail.com
. ../default.cfg
[ `id -u` -ne 0 ] && echo "Must be root!" && exit 1
[ `uname -m` = "i386" ] && exit 0 # OOM killing
dir=/tmp
odir=`pwd`
cd $dir
sed '1,/^EOF/d' < $odir/$0 > $dir/indir_trunc.c
mycc -o indir_trunc -Wall -Wextra -O0 -g indir_trunc.c -lpthread || exit 1
rm -f indir_trunc.c
cd $odir
set -e
mount | grep "on $mntpoint " | grep -q /dev/md && umount -f $mntpoint
[ -c /dev/md$mdstart ] && mdconfig -d -u $mdstart
mdconfig -a -t swap -s 40g -u $mdstart
newfs $newfs_flags -n md$mdstart > /dev/null
mount /dev/md$mdstart $mntpoint
set +e
###(cd ../testcases/swap; ./swap -t 5m -i 20) &
cd $mntpoint
$dir/indir_trunc
s=$?
while pkill swap; do :; done
wait
[ -f indir_trunc.core -a $s -eq 0 ] &&
{ ls -l indir_trunc.core; mv indir_trunc.core $dir; s=1; }
cd $odir
for i in `jot 6`; do
mount | grep -q "on $mntpoint " || break
umount $mntpoint && break || sleep 10
[ $i -eq 6 ] &&
{ echo FATAL; fstat -mf $mntpoint; exit 1; }
done
mdconfig -d -u $mdstart
rm -rf $dir/indir_trunc
exit $s
EOF
#include <sys/param.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <machine/atomic.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
static volatile u_int *share;
#if defined(__LP64__)
#define MASK 0x7ffffffffffffULL
#else
#define MASK 0xffffffff
#endif
#define PARALLEL 64
#define RUNTIME (5 * 60)
#define SYNC 0
static int fd;
static void *
t1(void *data __unused)
{
off_t offset;
time_t start;
char *cmdline[] = { "/usr/bin/true", NULL };
start = time(NULL);
while (time(NULL) - start < 60) {
offset = arc4random();
offset = (offset << 32) | arc4random();
offset &= MASK;
if (lseek(fd, offset, SEEK_SET) == -1)
err(1, "lseek(%jd)", offset);
if (write(fd, "a", 1) != 1)
err(1, "write");
usleep(10);
if (arc4random() % 1000 < 2) {
if (execve(cmdline[0], cmdline, NULL) == -1)
err(1, "execve");
}
}
return (NULL);
}
static void *
t2(void *data __unused)
{
off_t offset, old;
time_t start;
void *p;
char *c;
old = 0;
start = time(NULL);
while (time(NULL) - start < 60) {
if (old != 0)
munmap(p, old);
offset = arc4random();
offset = (offset << 32) | arc4random();
offset &= MASK;
if (ftruncate(fd, offset) == -1)
err(1, "ftruncate(%jd)", offset);
write(fd, "b", 1);
p = mmap(NULL, offset, PROT_READ | PROT_WRITE, MAP_SHARED,
fd, 0);
if (p == MAP_FAILED)
old = 0;
else {
old = offset;
c = p;
c[offset / 2] = 1;
if (offset > 0)
c[offset - 1] = 2;
}
usleep(10);
}
return (NULL);
}
static void
test(void)
{
pthread_t tid[2];
int r;
char file[80];
atomic_add_int(&share[SYNC], 1);
while (share[SYNC] != PARALLEL)
;
snprintf(file, sizeof(file), "file.%d", getpid());
if ((fd = open(file, O_RDWR | O_CREAT, DEFFILEMODE)) == -1)
err(1, "open(%s)", file);
if ((r = pthread_create(&tid[0], NULL, t1, NULL)) != 0)
errc(1, r, "pthread_create");
if ((r = pthread_create(&tid[1], NULL, t2, NULL)) != 0)
errc(1, r, "pthread_create");
if ((r = pthread_join(tid[0], NULL)) != 0)
errc(1, r, "pthread_join");
if ((r = pthread_join(tid[1], NULL)) != 0)
errc(1, r, "pthread_join");
close(fd);
unlink(file);
_exit(0);
}
int
main(void)
{
pid_t pids[PARALLEL];
size_t len;
time_t start;
int e, i, status;
e = 0;
len = PAGE_SIZE;
if ((share = mmap(NULL, len, PROT_READ | PROT_WRITE,
MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED)
err(1, "mmap");
start = time(NULL);
while ((time(NULL) - start) < RUNTIME && e == 0) {
share[SYNC] = 0;
for (i = 0; i < PARALLEL; i++) {
if ((pids[i] = fork()) == 0)
test();
if (pids[i] == -1)
err(1, "fork()");
}
for (i = 0; i < PARALLEL; i++) {
if (waitpid(pids[i], &status, 0) == -1)
err(1, "waitpid(%d)", pids[i]);
if (status != 0) {
if (WIFSIGNALED(status))
fprintf(stderr,
"pid %d exit signal %d\n",
pids[i], WTERMSIG(status));
}
e += status == 0 ? 0 : 1;
}
}
return (e);
}
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