#!/usr/bin/env bash # -*- coding: utf-8 -*- # # dissector_fuzz.sh -- fuzz test netsniff-ng's dissector and pcap io methods # with shitty pcap example files from the Wireshark archive # # Copyright (C) 2012 Daniel Borkmann # Copyright (C) 2012 Stefan Seering # # Note: build and *install* the toolkit first before running this script! # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License version 2 as # published by the Free Software Foundation. set -u if [ ${BASH_VERSINFO} -lt 3 ] ; then echo 'Error: Your bash need to be version 3 or newer. Exiting.' exit 1 # operators like =~ produce errors silently in old bash versions, so exit here fi archive='ftp://wireshark.org/automated/captures/' show_output='' # empty string evaluates to false run_through='' # empty string evaluates to false count_cores=0 count_files=0 netsniff_ng_opts='' if [ $# -gt 0 ] ; then if [ "$1" = '-h' -o "$1" = '--help' -o "$1" = '--usage' ] ; then echo 'Usage: dissector_fuzz [-s (show netsniff-ng output, default: no)] [-r (keep running on errors, default: no)] [netsniff-ng long-args]' exit 0 fi for opt in $@ ; do if [ "${opt}" = '-s' ] ; then show_output='true' elif [ "${opt}" = '-r' ] ; then run_through='true' else netsniff_ng_opts="${netsniff_ng_opts} ${opt}"; fi done fi mkdir -p fuzzing cd fuzzing wget -r -Nc -np -nd -A.pcap "$archive" |& grep -E "%|^--" ulimit -c unlimited rm -f core for file in *.pcap do echo "Testing file $file ..." if [ $show_output ]; then netsniff-ng --in "$file" "${netsniff_ng_opts}" else netsniff-ng --in "$file" "${netsniff_ng_opts}" > /dev/null fi if [ -e core ]; then echo "Fuck, core dumped on $file!" let count_cores=count_cores+1 if [ $run_through ]; then rm core else exit fi fi done if which cowsay > /dev/null ; then echo_cmd='cowsay' else echo_cmd='echo' fi ${echo_cmd} 'Your fuckup Score' echo " * tested pcaps: $count_files" echo " * core dumps: $count_cores" /log/'>
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authorDavid Woodhouse <dwmw2@infradead.org>2016-09-12 10:49:11 +0800
committerDavid Woodhouse <dwmw2@infradead.org>2016-11-19 09:42:35 -0800
commit910170442944e1f8674fd5ddbeeb8ccd1877ea98 (patch)
tree0d3b866ec62df63888e0c747e724ccd6f4b6efdf
parent1c387188c60f53b338c20eee32db055dfe022a9b (diff)
iommu/vt-d: Fix PASID table allocation
Somehow I ended up with an off-by-three error in calculating the size of the PASID and PASID State tables, which triggers allocations failures as those tables unfortunately have to be physically contiguous. In fact, even the *correct* maximum size of 8MiB is problematic and is wont to lead to allocation failures. Since I have extracted a promise that this *will* be fixed in hardware, I'm happy to limit it on the current hardware to a maximum of 0x20000 PASIDs, which gives us 1MiB tables — still not ideal, but better than before. Reported by Mika Kuoppala <mika.kuoppala@linux.intel.com> and also by Xunlei Pang <xlpang@redhat.com> who submitted a simpler patch to fix only the allocation (and not the free) to the "correct" limit... which was still problematic. Signed-off-by: David Woodhouse <dwmw2@infradead.org> Cc: stable@vger.kernel.org
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