163 lines
4.0 KiB
Bash
Executable File
163 lines
4.0 KiB
Bash
Executable File
#!/bin/sh
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#
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# Copyright (c) 2016 Dell EMC
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# Demonstrate that vfs_export() leaks M_CRED when mountd(8) is started:
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# "M_CRED leaked 160".
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[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
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. ../default.cfg
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pgrep -q mountd || echo "Note: mountd(8) must run for this test to fail"
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here=`pwd`
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cd /tmp
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sed '1,/^EOF/d' < $here/$0 > credleak.c
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mycc -o credleak -Wall -Wextra -O2 -g credleak.c || exit 1
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rm -f credleak.c
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mount | grep -q "on $mntpoint " && umount -f $mntpoint
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mount -t tmpfs tmpfs $mntpoint
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chmod 777 $mntpoint
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old=`vmstat -m | grep -w cred | awk '{print $2}'`
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su $testuser -c "/tmp/credleak $mntpoint" &
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while kill -0 $! 2>/dev/null; do
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umount -f $mntpoint &&
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mount -t tmpfs tmpfs $mntpoint
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chmod 777 $mntpoint
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sleep .1
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done
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pkill -9 swap
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wait
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while pkill -9 swap; do
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:
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done > /dev/null 2>&1
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while mount | grep $mntpoint | grep -q tmpfs; do
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umount $mntpoint || sleep 1
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done
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[ -d "$mntpoint" ] && (cd $mntpoint && find . -delete)
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rm -f /tmp/credleak
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s=0
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leak=$((`vmstat -m | grep -w cred | awk '{print $2}'` - old))
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[ $leak -gt 10 ] && { echo "M_CRED leaked $leak"; s=1; }
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exit $s
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EOF
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#define LOOPS 160
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#define PARALLEL 16
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int nbc, nbd;
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char *dir;
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void
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tmkdir(void)
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{
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int i, j;
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char d[MAXPATHLEN + 1], name[MAXPATHLEN + 1];
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setproctitle(__func__);
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i = 0;
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snprintf(name, sizeof(name), "%s/d1.%05d", dir, getpid());
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if (mkdir(name, 0755) == -1) {
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if (errno != ENAMETOOLONG && errno != ENOENT &&
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errno != EBUSY && errno != EACCES && errno != EPERM)
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warn("mkdir(%s)", name);
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_exit(0);
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}
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for (;;) {
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snprintf(d, sizeof(d), "/%d", i++);
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strncat(name, d, sizeof(name) - 1);
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if (mkdir(name, 0755) == -1) {
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if (errno != ENAMETOOLONG && errno != ENOENT &&
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errno != EBUSY && errno != EACCES && errno != EPERM)
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warn("mkdir(%s)", name);
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i--;
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break;
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}
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nbc++;
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}
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while (i >= 0) {
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snprintf(name, sizeof(name), "%s/d1.%05d", dir, getpid());
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for (j = 0; j < i; j++) {
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snprintf(d, sizeof(d), "/%d", j);
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strncat(name, d, sizeof(name) - 1);
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}
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if (rmdir(name) == -1) {
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if (errno != ENOTEMPTY && errno != ENOENT && errno !=
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EBUSY)
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warn("rmdir(%s)", name);
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} else
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nbd++;
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i--;
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}
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#if defined(TEST)
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if (nbc == 0)
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fprintf(stderr, "FAIL nbc = %d, nbd = %d\n", nbc, nbd);
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#endif
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_exit(0);
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}
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int
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main(int argc, char **argv)
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{
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int i, j;
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if (argc != 2) {
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fprintf(stderr, "Usage: %s <full path to dir>", argv[0]);
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exit(1);
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}
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dir = argv[1];
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for (j = 0; j < LOOPS; j++) {
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for (i = 0; i < PARALLEL; i++) {
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if (fork() == 0)
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tmkdir();
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}
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for (i = 0; i < PARALLEL; i++)
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wait(NULL);
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}
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return(0);
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}
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