Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753646AbYFPK3V (ORCPT ); Mon, 16 Jun 2008 06:29:21 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751578AbYFPK3O (ORCPT ); Mon, 16 Jun 2008 06:29:14 -0400 Received: from stinky.trash.net ([213.144.137.162]:60084 "EHLO stinky.trash.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751567AbYFPK3N (ORCPT ); Mon, 16 Jun 2008 06:29:13 -0400 Message-ID: <48564074.9030301@trash.net> Date: Mon, 16 Jun 2008 12:29:08 +0200 From: Patrick McHardy User-Agent: Mozilla-Thunderbird 2.0.0.12 (X11/20080405) MIME-Version: 1.0 To: odie@cs.aau.dk CC: Suresh Siddha , Vegard Nossum , Linux Kernel Mailinglist , Chuck Ebbert , x86@kernel.org Subject: Re: 2.6.26-git: NULL pointer deref in __switch_to References: <4852B19E.4010202@trash.net> <19f34abd0806131124w32133715o3ef8c27cb0a9f96e@mail.gmail.com> <20080613224711.GA15084@linux-os.sc.intel.com> <1213611339.2495.11.camel@odie.local> In-Reply-To: <1213611339.2495.11.camel@odie.local> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2305 Lines: 49 Simon Holm Th�� wrote: > fre, 13 06 2008 kl. 15:47 -0700, skrev Suresh Siddha: >> On Fri, Jun 13, 2008 at 11:24:01AM -0700, Vegard Nossum wrote: >>> On Fri, Jun 13, 2008 at 7:42 PM, Patrick McHardy wrote: >>>> I get this oops once a day, its apparently triggered by something >>>> run by cron, but the process is a different one each time. >>>> >>>> Kernel is -git from yesterday shortly before the -rc6 release >>>> (last commit is the usb-2.6 merge, the x86 patches are missing), >>>> .config is attached. >>>> >>>> I'll retry with current -git, but the patches that have gone in >>>> since I last updated don't look related. >>>> >>> Thanks for the report. >>> >>>> [62060.043009] BUG: unable to handle kernel NULL pointer dereference at >>>> 000001ff >>>> [62060.043009] IP: [] __switch_to+0x2f/0x118 >>>> [62060.043009] *pde = 00000000 >>>> [62060.043009] Oops: 0002 [#1] PREEMPT >> Patrick, Do you see any other error messages before this BUG stmt? Can you >> please provide the complete kernel log till the point of failure? >> > Suresh, I'm pretty sure this is the same problem that I reported two > weeks ago [1]. I suggested that you tried running lguest and reproduced > the problem locally, but I did not hear back from you. Now Patrick is > reporting the same problem and is also indicating that the problem is > correlated with his use of lguest, so I'd really like you to follow up > on this. > >> I have a theory for your problem and have appended a patch to test it. Can >> you please check if the appended patch fixes your problem. >> > At least for me, with this patch applied on top of -rc4 or -rc6+ the > problem still triggered after running an lguest guest for less than 30 > seconds (the guest didn't even finish the boot of an image of Ubuntu > with no X-server). The patch also didn't fix the problem here, I got the same crash this morning. Unfortunately netconsole didn't log it, but its essentially the same as the one I posted. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/