From: Wei Yongjun <yjwei@cn.fujitsu.com>
Date: Sat, 26 Jul 2008 10:59:10 +0000 (+0100)
Subject: dccp: Fix incorrect length check for ICMPv4 packets
X-Git-Tag: v2.6.27-rc1~33^2~1^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=18e1d836002ad970f42736bad09b7be9cfe99545;p=pandora-kernel.git

dccp: Fix incorrect length check for ICMPv4 packets

Unlike TCP, which only needs 8 octets of original packet data, DCCP requires
minimally 12 or 16 bytes for ICMP-payload sequence number checks.

This patch replaces the insufficient length constant of 8 with a two-stage
test, making sure that 12 bytes are available, before computing the basic
header length required for sequence number checks.

Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
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