From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Wed, 23 Nov 2011 22:29:23 +0000 (-0500)
Subject: ipv6: tcp: fix tcp_v6_conn_request()
X-Git-Tag: v3.2-rc5~56^2~41
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4d0fe50c75a547088e4304e5eb5f521514dfae46;p=pandora-kernel.git

ipv6: tcp: fix tcp_v6_conn_request()

Since linux 2.6.26 (commit c6aefafb7ec6 : Add IPv6 support to TCP SYN
cookies), we can drop a SYN packet reusing a TIME_WAIT socket.

(As a matter of fact we fail to send the SYNACK answer)

As the client resends its SYN packet after a one second timeout, we
accept it, because first packet removed the TIME_WAIT socket before
being dropped.

This probably explains why nobody ever noticed or complained.

Reported-by: Jesse Young <jlyo@jlyo.org>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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