Date: Mon, 1 Jul 2019 05:09:28 +0000 (UTC) From: Peter Holm <pho@FreeBSD.org> To: src-committers@freebsd.org, svn-src-user@freebsd.org Subject: svn commit: r349569 - user/pho/stress2/misc Message-ID: <201907010509.x6159SN5095175@repo.freebsd.org>
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Author: pho Date: Mon Jul 1 05:09:28 2019 New Revision: 349569 URL: https://svnweb.freebsd.org/changeset/base/349569 Log: Added a regression test. Sponsored by: Dell EMC Isilon Added: user/pho/stress2/misc/mmap37.sh (contents, props changed) Added: user/pho/stress2/misc/mmap37.sh ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ user/pho/stress2/misc/mmap37.sh Mon Jul 1 05:09:28 2019 (r349569) @@ -0,0 +1,155 @@ +#!/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. +# +# $FreeBSD$ +# + +# Regression test for https://reviews.freebsd.org/D20800 +# "Use a consistent snapshot of the fd's rights in fget_mmap()" +# https://people.freebsd.org/~pho/stress/log/mmap37.txt + +# Reported by syzbot+ae359438769fda1840f8@syzkaller.appspotmail.com +# Test scenario suggestion by markj@ +# Fixed by r349547 + +. ../default.cfg + +odir=`pwd` +cd /tmp +sed '1,/^EOF/d' < $odir/$0 > mmap37.c +mycc -o mmap37 -Wall -Wextra -O0 mmap37.c -lpthread || exit 1 +rm -f mmap37.c + +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 2g -u $mdstart +newfs $newfs_flags md$mdstart > /dev/null +mount /dev/md$mdstart $mntpoint +set +e + +cd $mntpoint +/tmp/mmap37 +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 -f /tmp/mmap37 +exit + +EOF +#include <sys/types.h> +#include <sys/mman.h> +#include <sys/param.h> + +#include <err.h> +#include <errno.h> +#include <fcntl.h> +#include <pthread.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <unistd.h> + +#define THREADS 2 +#define SIZ 0x06400000U /* 100 Mb */ + +static volatile int go; +static char path[128]; + +void * +thr(void *arg) +{ + size_t len; + void *p; + int fd; + + fd = 0; + len = SIZ; + if (*(int *)arg == 0) { + while (go == 1) { + if ((fd = open(path, 2)) == -1) + err(1,"open()"); + p = mmap(NULL, len, PROT_READ | PROT_WRITE, + MAP_SHARED, fd, 0); + munmap(p, len); + close(fd); + usleep(10); + } + } else { + while (go == 1) { + close(fd); + usleep(10); + } + } + + return (0); +} + +int +main(void) +{ + pthread_t threads[THREADS]; + size_t len; + int nr[THREADS]; + int i, fd, r; + + sprintf(path, "mmap37.%06d", getpid()); + if ((fd = open(path, O_CREAT | O_TRUNC | O_RDWR, 0622)) == -1) + err(1,"open()"); + len = SIZ; + if (ftruncate(fd, len) == -1) + err(1, "ftruncate"); + close(fd); + + go = 1; + for (i = 0; i < THREADS; i++) { + nr[i] = i; + if ((r = pthread_create(&threads[i], NULL, thr, + (void *)&nr[i])) != 0) + errc(1, r, "pthread_create()"); + } + + sleep(30); + go = 0; + + for (i = 0; i < THREADS; i++) { + if ((r = pthread_join(threads[i], NULL)) != 0) + errc(1, r, "pthread_join(%d)", i); + } + if (unlink(path) == -1) + err(1, "unlink(%s)", path); + + return (0); +}
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