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From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH net-next-2.6] Re: TCP/IP stack interpretation of
 acceptable packet
Date: Sun, 22 Mar 2009 21:50:33 -0700 (PDT)
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From: John Dykstra <john.dykstra1@gmail.com>
Date: Thu, 19 Mar 2009 00:44:53 +0000

> [PATCH net-next-2.6] tcp: Discard segments that ack data not yet sent
> 
> Discard incoming packets whose ack field iincludes data not yet sent.
> This is consistent with RFC 793 Section 3.9.
> 
> Change tcp_ack() to distinguish between too-small and too-large ack
> field values.  Keep segments with too-large ack fields out of the fast
> path, and change slow path to discard them.
> 
> Reported-by:  Oliver Zheng <mailinglists+netdev@oliverzheng.com>
> Signed-off-by: John Dykstra <john.dykstra1@gmail.com>

I've been mulling over this patch for more than a week :-)

Let's put this into net-next-2.6 and let it cook there for
a while.  It is possible I'll backport this into -stable
after some time.

Thanks!