1#!/bin/sh 2 3# 4# Copyright (c) 2008 Peter Holm <pho@FreeBSD.org> 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# $FreeBSD$ 29# 30 31# Stress test UFS2 file systems by introducing single bit errors in the FS 32# fsck fould fix the FS no matter how damaged, but f.x. this panic has been seen: 33# 34# panic(c0912b65,dfe96000,0,c09e4060,ef48c778,...) at panic+0x14b 35# vm_fault(c1868000,dfe96000,1,0) at vm_fault+0x1e0 36# trap_pfault(ef48c894,0,dfe96000) at trap_pfault+0x137 37# trap(dfe90008,ef480028,c0690028,d0560000,dfe96000,...) at trap+0x341 38# calltrap() at calltrap+0x5 39# --- trap 0xc, eip = 0xc08785a6, esp = 0xef48c8d4, ebp = 0xef48c958 --- 40# generic_bcopy(c81cd570,d0508000,c5ead600,c87b81c0,0,...) at generic_bcopy+0x1a 41# ffs_mount(d0508000,c5ead600,0,c09b0860,c5ecfc3c,...) at ffs_mount+0xa14 42# vfs_domount(c5ead600,cd8c7280,ccb75080,0,...) at vfs_domount+0x687 43# vfs_donmount(c5ead600,0,ef48cc04) at vfs_donmount+0x2ef 44# kernel_mount(c5660960,0,bfbfec86,0,fffffffe,...) at kernel_mount+0x6d 45# ffs_cmount(c5660960,bfbfde50,0,c5ead600,c09b0860,...) at ffs_cmount+0x5d 46# mount(c5ead600,ef48cd04) at mount+0x156 47# syscall(3b,3b,3b,804abcf,bfbfe8e4,...) at syscall+0x22f 48 49 50[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 51 52. ../default.cfg 53 54D=$diskimage 55 56tst() { 57 rm -f $D 58 truncate -s 2M $D 59 mdconfig -a -t vnode -f $D -u $mdstart 60 bsdlabel -w md$mdstart auto 61 newfs -b 8192 -f 1024 -U /dev/md${mdstart}${part} > /dev/null 2>&1 62 mount /dev/md${mdstart}${part} $mntpoint 63 cp /etc/passwd /etc/group /etc/hosts $mntpoint 64 cp -r /usr/include/ufs $mntpoint 65 umount $mntpoint 66 67 for i in `jot 50`; do 68 ./fuzz -n 50 $D 69 if fsck -f -y /dev/md${mdstart}${part} 2>&1 | egrep "^[A-Z]" > /dev/null; then 70 if fsck -f -y /dev/md${mdstart}${part} 2>&1 | egrep "^[A-Z]" > /dev/null; then 71 if fsck -f -y /dev/md${mdstart}${part} 2>&1 | egrep "^[A-Z]" > /dev/null; then 72 echo "fsck is giving up in loop $i!" 73 break 74 fi 75 fi 76 fi 77 sync;sync;sync 78 if mount /dev/md${mdstart}${part} $mntpoint; then 79 ls -l $mntpoint > /dev/null 80 find $mntpoint -exec dd if={} of=/dev/null bs=1m count=3 \; > /dev/null 2>&1 81 umount $mntpoint 82 else 83 echo "Giving up at loop $i" 84 break 85 fi 86 done 87 mdconfig -d -u ${mdstart} 88 rm -f $D 89} 90 91odir=`pwd` 92dir=/tmp 93 94cd $dir 95sed '1,/^EOF/d' < $odir/$0 > $dir/fuzz.c 96cc -o fuzz -Wall fuzz.c 97rm -f fuzz.c 98 99for j in `jot 10`; do 100 date '+%T' 101 tst 102done 103rm -f fuzz 104 105exit 106 107EOF 108#include <stdio.h> 109#include <stdlib.h> 110#include <unistd.h> 111#include <fcntl.h> 112#include <sys/stat.h> 113#include <err.h> 114 115void 116usage(void) 117{ 118 fprintf(stderr, "%s {-n <num|-v} <file>\n", getprogname()); 119 exit(1); 120} 121 122long 123random_long(long mi, long ma) 124{ 125 return (arc4random() % (ma - mi + 1) + mi); 126} 127 128int 129main(int argc, char **argv) 130{ 131 int ch, fd, i, times = 1, verbose = 0; 132 long pos; 133 unsigned char bit, buf, mask, old; 134 struct stat sb; 135 136 while ((ch = getopt(argc, argv, "n:v")) != -1) 137 switch(ch) { 138 case 'n': /* Bits to alter */ 139 if (sscanf(optarg, "%d", ×) != 1) 140 usage(); 141 break; 142 case 'v': /* verbose flag */ 143 verbose += 1; 144 break; 145 default: 146 usage(); 147 } 148 argc -= optind; 149 argv += optind; 150 151 if (argc == 0) 152 usage(); 153 154 155 if ((fd = open(argv[0], O_RDWR)) == -1) 156 err(1, "open(%s)", argv[0]); 157 if (fstat(fd, &sb) == -1) 158 err(1, "stat(%s)", argv[0]); 159 160 for (i = 0; i < times; i++) { 161 pos = random_long(0, sb.st_size - 1); 162 if (lseek(fd, pos, SEEK_SET) == -1) 163 err(1, "fseek(%d, %ld)", fd, pos); 164 if (read(fd, &buf, 1) != 1) 165 err(1, "read(%d)", fd); 166 bit = random_long(0,7); 167 mask = ~(1 << bit); 168 old = buf; 169 buf = (buf & mask) | (~buf & ~mask); 170 if (verbose > 0) 171 printf("Change %2x to %2x at %4ld by flipping bit %d\n", 172 old, buf, pos, bit); 173 if (lseek(fd, pos, SEEK_SET) == -1) 174 err(1, "fseek(%d, %ld)", fd, pos); 175 if (write(fd, &buf, 1) != 1) 176 err(1, "write(%d)", fd); 177 } 178 close(fd); 179 return (0); 180} 181