diff --git a/tools/test/stress2/misc/mmap39.sh b/tools/test/stress2/misc/mmap39.sh
index 15aa8ec718a3..f4b97717624b 100755
--- a/tools/test/stress2/misc/mmap39.sh
+++ b/tools/test/stress2/misc/mmap39.sh
@@ -1,131 +1,131 @@
 #!/bin/sh
 
 #
 # SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 #
 # Copyright (c) 2020 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.
 #
 
 # Attempt to reproduce
 # "panic: pmap_release: pmap 0xfffffe012fb61b08 resident count 1 != 0"
 # No problems seen.
 
 # Test scenario suggestion by kib@
 
 . ../default.cfg
 [ `id -u` -ne 0 ] && echo "Must be root!" && exit 1
 [ `uname -p` != "amd64" ] && exit 0
 
 dir=/tmp
 odir=`pwd`
 cd $dir
 sed '1,/^EOF/d' < $odir/$0 > $dir/mmap39.c
 mycc -o mmap39 -Wall -Wextra -O0 -g mmap39.c -static || exit 1
 rm -f mmap39.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 2g -u $mdstart
 newfs $newfs_flags md$mdstart > /dev/null
 mount /dev/md$mdstart $mntpoint
 set +e
 
 for i in `jot 128`; do
-	$dir/mmap39 &
+	proccontrol -m aslr -s disable $dir/mmap39 &
 	pids="$pids $!"
 done
 s=0
 for pid in $pids; do
 	wait $pid
 	r=$?
 	[ $s -ne 0 ] && s=$r
 done
 
 [ -f mmap39.core -a $s -eq 0 ] &&
     { ls -l mmap39.core; mv mmap39.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/mmap39
 exit $s
 
 EOF
 #include <sys/param.h>
 #include <sys/mman.h>
 #include <sys/wait.h>
 
 #include <err.h>
 #include <stdio.h>
 #include <time.h>
 #include <unistd.h>
 
 void
 test(void)
 {
 	size_t i, len;
 	void *p;
 
 	p = (void *)0x8000000000; /* 512G */
 	len = 0x200000;		  /*   2M */
 	if ((p = mmap(p, len, PROT_READ | PROT_WRITE, MAP_ANON, -1, 0)) ==
 	    MAP_FAILED)
 		err(1, "mmap");
 
 	if (p != (void *)0x8000000000)
 		errx(1, "mmap address fail");
 
 	for (i = 0; i < len; i += PAGE_SIZE)
 		*(char *)(p + i) = 1;
 
 	if (munmap(p, len) == -1)
 		err(1, "munmap()");
 
 	_exit(0);
 }
 
 int
 main(void)
 {
 	time_t start;
 	pid_t pid;
 
 	sleep(5);
 	start = time(NULL);
 	while (time(NULL) - start < 120) {
 		if ((pid = fork()) == 0)
 			test();
 		if (waitpid(pid, NULL, 0) != pid)
 			err(1, "waitpid");
 	}
 
 	return (0);
 }