stress2: Added a new regression test

tools/test/stress2/misc/chroot.sh

@@ -0,0 +1,83 @@
+#!/bin/sh
+
+#
+# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+#
+# Copyright (c) 2021 Peter Holm <pho@FreeBSD.org>
+#
+# 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.
+#
+
+# Test scenario input by: "Patrick Sullivan" sulli00777@gmail.com
+
+# Bug 253593
+# "panic: ldvp 0xffff... fl 0x1 dvp 0xffff... fl 0 flags 0x34048144" seen.
+# https://people.freebsd.org/~pho/stress/log/log0087.txt
+
+[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
+
+. ../default.cfg
+
+mount | grep $mntpoint | grep -q /dev/md && umount -f $mntpoint
+mdconfig -l | grep -q md$mdstart &&  mdconfig -d -u $mdstart
+
+odir=`pwd`
+cd /tmp
+sed '1,/^EOF/d' < $odir/$0 > chroot.c
+rm -f /tmp/chroot
+mycc -o chroot -Wall -Wextra -O0 -g chroot.c -static || exit 1
+rm -f chroot.c
+
+mdconfig -a -t swap -s 10m -u $mdstart || exit 1
+newfs -n $newfs_flags md$mdstart > /dev/null
+mount /dev/md$mdstart $mntpoint
+mkdir -p $mntpoint/root/dir $mntpoint/jail $mntpoint/dev
+mount -t nullfs $mntpoint/root $mntpoint/jail
+mount -t devfs null $mntpoint/dev
+mv /tmp/chroot $mntpoint/root
+
+chroot $mntpoint/jail ./chroot &
+sleep .5
+mv $mntpoint/root/dir $mntpoint
+wait
+
+umount $mntpoint/dev
+umount $mntpoint/jail
+while mount | grep "on $mntpoint " | grep -q /dev/md; do
+	umount $mntpoint || sleep 1
+done
+mdconfig -d -u $mdstart
+exit
+EOF
+#include <sys/types.h>
+#include <err.h>
+#include <stdio.h>
+#include <unistd.h>
+
+int
+main(void)
+{
+	if (chdir("dir") == -1)
+		err(1, "chdir() #1");
+	sleep(2);
+	fprintf(stderr, "cwd is %s\n", getwd(NULL));
+}