netdev - Re: 3.9.5+: Crash in tcp

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Message-ID: <1372826512.4979.49.camel@edumazet-glaptop>
Date:	Tue, 02 Jul 2013 21:41:52 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Ben Greear <greearb@...delatech.com>
Cc:	netdev <netdev@...r.kernel.org>
Subject: Re: 3.9.5+:  Crash in tcp_input.c:4810.

On Tue, 2013-07-02 at 20:21 -0700, Ben Greear wrote:

> What kinds of things could a driver do to cause this.  Maybe modify an
> skb after it has sent it up the stack, or something like that?
> 

It might be a genuine TCP bug, who knows...

> We haven't been able to reproduce on a clean 3.10 yet...but it often takes days,
> so we'll leave the test up through end of this week if we don't hit it
> sooner...

TCP collapse is/should be really rare, but losses can of course trigger
it.

> 
> I'll add your patch to my 3.9 tree.

Thanks

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