1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
|
#!/bin/sh
#
# SPDX-License-Identifier: BSD-2-Clause
#
# 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.
#
# Test scenario based on alc@'s suggestion for D19826
# No problems seen.
[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
. ../default.cfg
dir=/tmp
odir=`pwd`
cd $dir
sed '1,/^EOF/d' < $odir/$0 > $dir/vm_map.c
mycc -o vm_map -Wall -Wextra -O2 vm_map.c || exit 1
rm -f vm_map.c
pages=$((`sysctl -n hw.usermem` / `sysctl -n hw.pagesize`))
[ `sysctl -n vm.swap_total` -eq 0 ] &&
pages=$((pages / 10 * 8))
proccontrol -m aslr -s disable /tmp/vm_map $pages
rm -f /tmp/vm_map
exit $s
EOF
#include <sys/param.h>
#include <sys/mman.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
static long n;
#define RUNTIME (2 * 60)
#define INCARNATIONS 32
int
test(void)
{
size_t len;
time_t start;
void *a;
char **c;
int i;
a = NULL;
c = calloc(n, sizeof(char *));
len = PAGE_SIZE;
start = time(NULL);
while ((time(NULL) - start) < RUNTIME) {
for (i = 0; i < n; i++) {
if ((a = mmap((void *)a, len, PROT_READ | PROT_WRITE,
MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED)
err(1, "mmap");
c[i] = a;
*c[i] = 1;
a += PAGE_SIZE;
}
for (i = 0; i < n; i++) {
if (munmap(c[i], PAGE_SIZE) == -1)
err(1, "munmap(%p)", c[i]);
}
a = NULL;
}
_exit(0);
}
int
main(int argc, char *argv[])
{
int i;
if (argc != 2) {
fprintf(stderr, "Usage %s <pages>\n", argv[0]);
exit(1);
}
n = atol(argv[1]) / INCARNATIONS;
for (i = 0; i < INCARNATIONS; i++)
if (fork() == 0)
test();
for (i = 0; i < INCARNATIONS; i++)
wait(NULL);
return (0);
}
|
