From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andrew Morton <akpm@osdl.org>
Subject: Re: 2.6.17-mm4
Date: Thu, 29 Jun 2006 13:58:26 -0700
Message-ID: <20060629135826.20328067.akpm@osdl.org>
References: <20060629013643.4b47e8bd.akpm@osdl.org>
	<6bffcb0e0606291339s69a16bc5ie108c0b8d4e29ed6@mail.gmail.com>
	<20060629204330.GC13619@redhat.com>
	<6bffcb0e0606291346s64530db4g1c9c33da9cf34e73@mail.gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Cc: davej@redhat.com, michal.k.k.piotrowski@gmail.com,
	linux-kernel@vger.kernel.org, netdev@vger.kernel.org
Return-path: <netdev-owner@vger.kernel.org>
Received: from smtp.osdl.org ([65.172.181.4]:54432 "EHLO smtp.osdl.org")
	by vger.kernel.org with ESMTP id S932527AbWF2UzM (ORCPT
	<rfc822;netdev@vger.kernel.org>); Thu, 29 Jun 2006 16:55:12 -0400
To: "Michal Piotrowski" <michal.k.k.piotrowski@gmail.com>
In-Reply-To: <6bffcb0e0606291346s64530db4g1c9c33da9cf34e73@mail.gmail.com>
Sender: netdev-owner@vger.kernel.org
List-Id: netdev.vger.kernel.org

"Michal Piotrowski" <michal.k.k.piotrowski@gmail.com> wrote:
>
> On 29/06/06, Dave Jones <davej@redhat.com> wrote:
> > On Thu, Jun 29, 2006 at 10:39:33PM +0200, Michal Piotrowski wrote:
> >
> >  > This looks very strange.
> >  >
> >  > BUG: unable to handle kernel paging request at virtual address 6b6b6c07
> >
> > Looks like a use after free.
> >
> >  > printing eip:
> >  > c0138594
> >  > *pde=00000000
> >  > Oops: 0002 [#1]
> >  > 4K_STACK PREEMPT SMP
> >  > last sysfs file /class/net/eth0/address
> >  > Modules linked in: ipv6 af_packet ipt_REJECT xt_tcpudp x_tables
> >  > p4_clockmod speedstep_lib binfmt_misc
> >  >
> >  > (gdb) list *0xc0138594
> >  > 0xc0138594 is in __lock_acquire (include2/asm/atomic.h:96).
> >  > warning: Source file is more recent than executable.
> >
> > got a backtrace ?
> 
> Unfortunately no.
> 

How irritating.

CONFIG_FRAME_POINTER=y
# CONFIG_UNWIND_INFO is not set

OK.  Perhaps try setting 8k stacks?

Disable lockdep?