From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751866AbaLOJ20 (ORCPT ); Mon, 15 Dec 2014 04:28:26 -0500 Received: from mail-wg0-f42.google.com ([74.125.82.42]:40163 "EHLO mail-wg0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750865AbaLOJ2Y (ORCPT ); Mon, 15 Dec 2014 04:28:24 -0500 Message-ID: <548EA9B5.70602@suse.cz> Date: Mon, 15 Dec 2014 10:28:21 +0100 From: Jiri Slaby User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.3.0 MIME-Version: 1.0 To: Borislav Petkov , Richard Farthing CC: linux-kernel@vger.kernel.org Subject: Re: Kernel boot panic 3.12-34 > 3.12.35 References: <548DAFA0.1090700@iee.org> <20141214182518.GA607@pd.tnic> In-Reply-To: <20141214182518.GA607@pd.tnic> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 12/14/2014, 07:25 PM, Borislav Petkov wrote: > On Sun, Dec 14, 2014 at 03:41:20PM +0000, Richard Farthing wrote: >> I patched 3.12.34 to 3.12.35 and the attached now happens at boot. >> Sorry I don't have better than a photo, cannot get past this. >> >> The root FS is EXT2. It's admittedly an old test machine that I'm using to >> build up a new configuration, so the BIOS is a bit old, but it's at least >> dual core, not totally ancient. >> >> Let me know if you need more diagnostic > > That happens very early and the first oops which is the most > relevant one is cut off and one cannot see what the bug actually is, > unfortunately. > > Can you catch dmesg of that boot over serial or netconsole or so? Ask if > you don't know how. > > You could send your .config, maybe it is reproducible in kvm. Also, can > you send a full dmesg of the successful boot with 3.12.34? Hmm... panic from mount_block_root? That would be: "VFS: Unable to mount root fs on %s" Did you use proper root= kernel parameter? Do you have initrd properly created and installed? thanks, -- js suse labs