From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755560Ab2JINWV (ORCPT ); Tue, 9 Oct 2012 09:22:21 -0400 Received: from mail-qc0-f174.google.com ([209.85.216.174]:35573 "EHLO mail-qc0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753320Ab2JINWS (ORCPT ); Tue, 9 Oct 2012 09:22:18 -0400 Message-ID: <507424F7.60801@gmail.com> Date: Tue, 09 Oct 2012 09:21:59 -0400 From: Sasha Levin User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:15.0) Gecko/20120913 Thunderbird/15.0.1 MIME-Version: 1.0 To: Jiri Kosina CC: Jan Kara , Tejun Heo , axboe@kernel.dk, Dave Jones , "linux-kernel@vger.kernel.org" , ben@decadent.org.uk Subject: Re: blk: NULL ptr deref in blk_dequeue_request() References: <505E2108.2060108@gmail.com> <20121008172207.GB14767@quack.suse.cz> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/08/2012 05:45 PM, Jiri Kosina wrote: > On Mon, 8 Oct 2012, Jan Kara wrote: > >>> > > I'm still seeing this on linux-next. >> > I think this is floppy related (see redo_fd_request() in the stack >> > trace). And there were quite some changes to the area recently. Adding >> > maintainer to CC. > Hmm ... I don't immediately see how this is happening. > > Sasha, could you please do git bisect on drivers/block/floppy.c between > f6365201d and your git HEAD for starters (assuming that f6365201d works > well for you?). > A bisect on floppy.c yielded the following: b33d002f4b6bae912463e5a66387c498aa69b6fe is the first bad commit commit b33d002f4b6bae912463e5a66387c498aa69b6fe Author: Ben Hutchings Date: Mon Aug 27 20:56:53 2012 -0300 genhd: Make put_disk() safe for disks that have not been registered Thanks, Sasha