#!/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 <borkmann@redhat.com>
# Copyright (C) 2012 Stefan Seering <sseerin@imn.htwk-leipzig.de>
#
# 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"
t type='hidden' name='id' value='a03e6fe569713fb3ff0714f8fd7c8785c0ca9e22'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='a03e6fe569713fb3ff0714f8fd7c8785c0ca9e22'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>WANG Cong &lt;xiyou.wangcong@gmail.com&gt;</td><td class='right'>2016-06-06 09:54:30 -0700</td></tr>
<tr><th>committer</th><td>David S. Miller &lt;davem@davemloft.net&gt;</td><td class='right'>2016-06-07 16:38:59 -0700</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?id=a03e6fe569713fb3ff0714f8fd7c8785c0ca9e22'>a03e6fe569713fb3ff0714f8fd7c8785c0ca9e22</a> (<a href='/cgit.cgi/linux/net-next.git/patch/?id=a03e6fe569713fb3ff0714f8fd7c8785c0ca9e22'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=a03e6fe569713fb3ff0714f8fd7c8785c0ca9e22'>2503e58b9720cb4ee120033ab4df1bc97ba93c4c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?id=aafddbf0cffeb790f919436285328c762279b5d4'>aafddbf0cffeb790f919436285328c762279b5d4</a> (<a href='/cgit.cgi/linux/net-next.git/diff/?id=a03e6fe569713fb3ff0714f8fd7c8785c0ca9e22&amp;id2=aafddbf0cffeb790f919436285328c762279b5d4'>diff</a>)</td></tr></table>
<div class='commit-subject'>act_police: fix a crash during removal</div><div class='commit-msg'>The police action is using its own code to initialize tcf hash
info, which makes us to forgot to initialize a-&gt;hinfo correctly.
Fix this by calling the helper function tcf_hash_create() directly.

This patch fixed the following crash:

 BUG: unable to handle kernel NULL pointer dereference at 0000000000000028
 IP: [&lt;ffffffff810c099f&gt;] __lock_acquire+0xd3/0xf91
 PGD d3c34067 PUD d3e18067 PMD 0
 Oops: 0000 [#1] SMP
 CPU: 2 PID: 853 Comm: tc Not tainted 4.6.0+ #87
 Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
 task: ffff8800d3e28040 ti: ffff8800d3f6c000 task.ti: ffff8800d3f6c000
 RIP: 0010:[&lt;ffffffff810c099f&gt;]  [&lt;ffffffff810c099f&gt;] __lock_acquire+0xd3/0xf91
 RSP: 0000:ffff88011b203c80  EFLAGS: 00010002
 RAX: 0000000000000046 RBX: 0000000000000000 RCX: 0000000000000000
 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000028
 RBP: ffff88011b203d40 R08: 0000000000000001 R09: 0000000000000000
 R10: ffff88011b203d58 R11: ffff88011b208000 R12: 0000000000000001
 R13: ffff8800d3e28040 R14: 0000000000000028 R15: 0000000000000000
 FS:  0000000000000000(0000) GS:ffff88011b200000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 CR2: 0000000000000028 CR3: 00000000d4be1000 CR4: 00000000000006e0
 Stack:
  ffff8800d3e289c0 0000000000000046 000000001b203d60 ffffffff00000000
  0000000000000000 ffff880000000000 0000000000000000 ffffffff00000000
  ffffffff8187142c ffff88011b203ce8 ffff88011b203ce8 ffffffff8101dbfc
 Call Trace:
  &lt;IRQ&gt;
  [&lt;ffffffff8187142c&gt;] ? __tcf_hash_release+0x77/0xd1
  [&lt;ffffffff8101dbfc&gt;] ? native_sched_clock+0x1a/0x35
  [&lt;ffffffff8101dbfc&gt;] ? native_sched_clock+0x1a/0x35
  [&lt;ffffffff810a9604&gt;] ? sched_clock_local+0x11/0x78
  [&lt;ffffffff810bf6a1&gt;] ? mark_lock+0x24/0x201
  [&lt;ffffffff810c1dbd&gt;] lock_acquire+0x120/0x1b4
  [&lt;ffffffff810c1dbd&gt;] ? lock_acquire+0x120/0x1b4
  [&lt;ffffffff8187142c&gt;] ? __tcf_hash_release+0x77/0xd1
  [&lt;ffffffff81aad89f&gt;] _raw_spin_lock_bh+0x3c/0x72
  [&lt;ffffffff8187142c&gt;] ? __tcf_hash_release+0x77/0xd1
  [&lt;ffffffff8187142c&gt;] __tcf_hash_release+0x77/0xd1
  [&lt;ffffffff81871a27&gt;] tcf_action_destroy+0x49/0x7c
  [&lt;ffffffff81870b1c&gt;] tcf_exts_destroy+0x20/0x2d
  [&lt;ffffffff8189273b&gt;] u32_destroy_key+0x1b/0x4d
  [&lt;ffffffff81892788&gt;] u32_delete_key_freepf_rcu+0x1b/0x1d
  [&lt;ffffffff810de3b8&gt;] rcu_process_callbacks+0x610/0x82e
  [&lt;ffffffff8189276d&gt;] ? u32_destroy_key+0x4d/0x4d
  [&lt;ffffffff81ab0bc1&gt;] __do_softirq+0x191/0x3f4

Fixes: ddf97ccdd7cb ("net_sched: add network namespace support for tc actions")
Cc: Jamal Hadi Salim &lt;jhs@mojatatu.com&gt;
Signed-off-by: Cong Wang &lt;xiyou.wangcong@gmail.com&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=a03e6fe569713fb3ff0714f8fd7c8785c0ca9e22'>Diffstat</a></div><table summary='diffstat' class='diffstat'>