103 lines
2.7 KiB
Bash
Executable File
103 lines
2.7 KiB
Bash
Executable File
#!/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.
|
|
#
|
|
|
|
# "panic: Most recently used by tty" seen.
|
|
# Reported by syzbot+c9b6206303bf47bac87e@syzkaller.appspotmail.com
|
|
# Fixed by r349733
|
|
|
|
[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
|
|
kldstat -v | grep -q pty || { kldload pty || exit 0; }
|
|
|
|
. ../default.cfg
|
|
|
|
here=`pwd`
|
|
cd /tmp
|
|
sed '1,/^EOF/d' < $here/$0 > pts3.c
|
|
mycc -o pts3 -Wall -Wextra -O2 pts3.c || exit 1
|
|
rm -f pts3.c
|
|
|
|
/tmp/pts3; s=$?
|
|
|
|
rm -f /tmp/pts3
|
|
exit $s
|
|
EOF
|
|
#include <sys/param.h>
|
|
#include <sys/mman.h>
|
|
#include <sys/wait.h>
|
|
|
|
#include <machine/atomic.h>
|
|
|
|
#include <err.h>
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <time.h>
|
|
#include <unistd.h>
|
|
|
|
static volatile u_int *share;
|
|
#define SYNC 0
|
|
|
|
int
|
|
main(void)
|
|
{
|
|
pid_t p, pid;
|
|
size_t len;
|
|
time_t start;
|
|
int fd;
|
|
char path[128];
|
|
|
|
len = PAGE_SIZE;
|
|
if ((share = mmap(NULL, len, PROT_READ | PROT_WRITE,
|
|
MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED)
|
|
err(1, "mmap");
|
|
|
|
p = getpid();
|
|
sprintf(path, "/dev/ptmx");
|
|
start = time(NULL);
|
|
while (time(NULL) - start < 60) {
|
|
share[SYNC] = 0;
|
|
if ((fd = open(path, O_RDWR)) == -1)
|
|
err(1,"open()");
|
|
if ((pid = fork()) == 0) {
|
|
while (share[SYNC] == 0)
|
|
;
|
|
_exit(0);
|
|
}
|
|
share[SYNC] = 1;
|
|
if (fcntl(fd, F_SETOWN, p) == -1)
|
|
warn("fcntl()");
|
|
close(fd);
|
|
if (waitpid(pid, NULL, 0) != pid)
|
|
err(1, "waitpid()");
|
|
}
|
|
|
|
return (0);
|
|
}
|