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Date:	Sun, 2 Sep 2007 10:32:06 +0530 (IST)
From:	Satyam Sharma <satyam@...radead.org>
To:	Alexey Dobriyan <adobriyan@...il.com>
cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	netdev@...r.kernel.org, davem@...emloft.net
Subject: Re: 2.6.23-rc4-mm1: unpingable box and NULL dereference at
 tcp_rto_min()



On Sun, 2 Sep 2007, Alexey Dobriyan wrote:
> 
> Unable to handle kernel NULL pointer dereference at 0000000000000039 RIP: 
>  [<ffffffff803b6f7c>] tcp_rto_min+0xc/0x20

tcp_rto_min() lacks a check-for-NULL. You want 5c127c58ae9bf196 from
the net-2.6.git tree -- so this will be gone in -rc6.

> P.S.: uh-oh, it's "[TCP] Allow minnimum RTO ..." aka 05bb1fad1cde

Yup, it came from this last commit in net-2.6 before -rc5.

[ Considering it's pretty core code (and thus the oops fairly easily
  reproducible), I initially thought this must've come from net-2.6.24.
  I suspect lot of testers might hit this, so would be wise to put that
  patch up as a hot-fix ? ]


Satyam
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