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From: David Miller <davem@davemloft.net>
Subject: Re: [Bug 24842] New: Compatibility issue with uggly Windows
 RFC1323 implementation.
Date: Thu, 16 Dec 2010 14:08:51 -0800 (PST)
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From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Mon, 13 Dec 2010 23:31:02 +0100

> [PATCH net-next-2.6] tcp: relax tcp_paws_check()
> 
> Some windows versions have wrong RFC1323 implementations, with SYN and
> SYNACKS messages containing zero tcp timestamps.
> 
> We relaxed in commit fc1ad92dfc4e363 the passive connection case
> (Windows connects to a linux machine), but the reverse case (linux
> connects to a Windows machine) has an analogue problem when tsvals from
> windows machine are 'negative' (high order bit set) : PAWS triggers and
> we drops incoming messages.
> 
> Fix this by making zero ts_recent value special, allowing frame to be
> processed.
> 
> Based on a report and initial patch from Dmitiy Balakin
> 
> Bugzilla reference : https://bugzilla.kernel.org/show_bug.cgi?id=24842
> 
> Reported-by: dmitriy.balakin@nicneiron.ru
> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>

Applied to net-next-2.6, thanks!