Attachment 32273 Details for Bug 73793

his program, exchanges random bytes

cdmangle (text/plain), 1.30 KB, created by Ludwig Nussel on 2005-03-18 10:08:47 UTC

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Creator: Ludwig Nussel

Created: 2005-03-18 10:08:47 UTC

Size: 1.30 KB

patch

obsolete

>#!/bin/bash
>
>cd /tmp || exit 1
>
>echo '[*] Compiling mangler...'
>
>cat >mangle.c <<_EOF_
>char buf[10240];
>main() {
>  int i,x;
>  srand(time(0) ^ getpid());
>  while ( (i = read(0,buf,sizeof(buf))) > 0) {
>    x = rand() % (i/20);
>    while (x--) buf[rand() % i] = rand();
>    write(1,buf,i);
>  }
>}
>_EOF_
>
>gcc -O3 mangle.c -o mangle || exit 1
>rm -f mangle.c
>
>echo '[*] Preparing ISO master (feel free to alter this code)...'
>
>mkdir cd_dir || exit 1
>cd cd_dir
>
>CNT=0
>while [ "$CNT" -lt "200" ]; do
>  mkdir A; cd A
>  CNT=$[CNT+1]
>done
>
>cd /tmp/cd_dir
>
>A=`perl -e '{print "A"x255}' 2>/dev/null`
>CNT=0
>while [ "$CNT" -lt "3" ]; do
>  mkdir "$A"; cd "$A"
>  CNT=$[CNT+1]
>done
>
>cd /tmp
>
>echo '[*] Creating image (alter filesystem or parameters as needed)...'
>
>mkisofs -U -R -J -o cd.iso cd_dir 2>/dev/null || exit 1
>rm -rf cd_dir
>
>echo '[*] STRESS TEST PHASE...'
>
>while :; do 
>  DIR="/tmp/cdtest-$$-$RANDOM"
>  mkdir "$DIR"
>  dmesg -c 2>/dev/null
>  cat cd.iso | ./mangle >cd_mod.iso
>  mount -t iso9660 -o loop,ro /tmp/cd_mod.iso "$DIR" 2>/dev/null
>  # ls -lAR "$DIR" - Uncomment if you like when it HURTS...
>  umount "$DIR" 2>/dev/null
>  rm -rf "$DIR" 2>/dev/null
>  FAULT=`dmesg | grep -Ei 'oops|unable to handle'`
>  test "$FAULT" = "" || break
>done
>
>dmesg | tail -30
>
>echo '[+] Something found (/tmp/cd-mod.iso)...'
>
>rm -f cd.iso mangle
>exit 0

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Attachments on bug 73793: 32273