1#!/bin/sh 2 3# 4# Copyright (c) 2013 EMC Corp. 5# All rights reserved. 6# 7# Redistribution and use in source and binary forms, with or without 8# modification, are permitted provided that the following conditions 9# are met: 10# 1. Redistributions of source code must retain the above copyright 11# notice, this list of conditions and the following disclaimer. 12# 2. Redistributions in binary form must reproduce the above copyright 13# notice, this list of conditions and the following disclaimer in the 14# documentation and/or other materials provided with the distribution. 15# 16# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26# SUCH DAMAGE. 27# 28 29# Issue involving signed overflow. 30# Test scenario based on panic seen in 31# http://people.freebsd.org/~pho/stress/log/kostik640.txt 32# Fixed in r258365, r258397. 33 34# Scenario by kib@ 35 36[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 37 38. ../default.cfg 39 40mount | grep -q "/proc " || mount -t procfs procfs /proc 41 42here=`pwd` 43cd /tmp 44sed '1,/^EOF/d' < $here/$0 > procfs_lr.c 45mycc -o procfs_lr -Wall -Wextra -O2 procfs_lr.c || exit 1 46rm -f procfs_lr.c 47 48/tmp/procfs_lr 2>/dev/null 49 50rm -f /tmp/procfs_lr 51 52exit 0 53EOF 54/* $Id: procfs_lr.c,v 1.1 2013/11/16 07:06:46 kostik Exp kostik $ */ 55 56#include <sys/types.h> 57#include <sys/fcntl.h> 58#include <err.h> 59#include <errno.h> 60#include <string.h> 61#include <stdio.h> 62#include <unistd.h> 63 64int 65main(void) 66{ 67 static const char name[] = "/proc/curproc/map"; 68 const off_t uio_offset = 0x6f51f3a1185bced9; 69#if defined(__LP64__) 70 const size_t uio_resid = 0x4c330b10965a61af; 71#else 72 const size_t uio_resid = 0x965a61af; 73#endif 74 char buf[1]; 75 int error, fd; 76 77 fd = open(name, O_RDONLY); 78 if (fd == -1) 79 err(1, "open"); 80 error = pread(fd, buf, uio_resid, uio_offset); 81 if (error == -1) 82 fprintf(stderr, "pread: %s\n", strerror(errno)); 83 return (0); 84} 85