From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dave Jones Subject: Re: Linux 3.0 oopses when pulling a USB CDROM Date: Fri, 1 Jul 2011 14:40:46 -0400 Message-ID: <20110701184046.GA2118@redhat.com> References: <20110701170531.GA3693@tassilo.jf.intel.com> <20110701181406.GA1614@redhat.com> <20110701183227.GF23059@one.firstfloor.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mx1.redhat.com ([209.132.183.28]:54003 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751426Ab1GASlC (ORCPT ); Fri, 1 Jul 2011 14:41:02 -0400 Content-Disposition: inline In-Reply-To: <20110701183227.GF23059@one.firstfloor.org> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Andi Kleen Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, axboe@kernel.dk, rjw@sisk.pl On Fri, Jul 01, 2011 at 08:32:27PM +0200, Andi Kleen wrote: > On Fri, Jul 01, 2011 at 02:14:06PM -0400, Dave Jones wrote: > > On Fri, Jul 01, 2011 at 10:05:31AM -0700, Andi Kleen wrote: > > > > > I found I can reliably crash a 3.0 system by pulling the > > > USB cable of a mounted USB cdrom (or rather a USB device which > > > has a builtin fake CD-ROM) > > > > > > I suspect it's a regression too. > > > > We've been seeing a lot of similar bugs in Fedora since we pushed > > a 2.6.38.8 update. Some of the traces are different, but some > > I've also seen one with an earlier kernel where the NULL > reference was in elv_.* something. Don't have a written down backtrace > for this, but perhaps you have. We had a bazillion reports of elv_may_queue oopses that looked like https://bugzilla.redhat.com/show_bug.cgi?id=elv_may_queue That should be fixed in .39 and newer. Dave