linux-kernel - Re: NULL pointer dereference when loading the gre module (3.10.0-rc4)

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Message-ID: <1370577588.24311.407.camel@edumazet-glaptop>
Date:	Thu, 06 Jun 2013 20:59:48 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	"Steinar H. Gunderson" <sgunderson@...foot.com>,
	linux-kernel@...r.kernel.org, davem@...emloft.net,
	netdev@...r.kernel.org, Rusty Russell <rusty@...tcorp.com.au>
Subject: Re: NULL pointer dereference when loading the gre module
 (3.10.0-rc4)

On Thu, 2013-06-06 at 23:06 -0400, Steven Rostedt wrote:
> On Fri, Jun 07, 2013 at 12:16:56AM +0200, Steinar H. Gunderson wrote:
> > Hi,
> > 
> > In 3.10.0-rc4, I get this on boot:
> > 
> > [   16.871043] BUG: unable to handle kernel NULL pointer dereference at 0000000000000003
> > [   16.879453] IP: [<ffffffffa0e52002>] 0xffffffffa0e52001
> 
> Strange, kallsyms should have registered the address already, even if it
> crashed on early module load. Not sure why it's not reporting it. Well,
> it seems to have reported some of the symbols of ip_gre below. Maybe
> this pointer is just totally screwed up.

I could not reproduce this here.

Steinar, please make sure you recompiled your modules, because this
looks like you loaded old modules.



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