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

From: Eric Dumazet
Date: Thu Jun 06 2013 - 23:59:55 EST

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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