linux-kernel - Re: Linux 3.0 oopses when pulling a USB CDROM

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Message-ID: <20110701184046.GA2118@redhat.com>
Date:	Fri, 1 Jul 2011 14:40:46 -0400
From:	Dave Jones <davej@...hat.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
	axboe@...nel.dk, rjw@...k.pl
Subject: Re: Linux 3.0 oopses when pulling a USB CDROM

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

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