linux-kernel - Re: [Stable-review] [28/55] [SCSI] fix crash in scsi_dispatch

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Date:	Mon, 8 Aug 2011 10:04:24 -0700
From:	Greg KH <gregkh@...e.de>
To:	Ben Hutchings <ben@...adent.org.uk>
Cc:	James Bottomley <JBottomley@...allels.com>,
	linux-kernel@...r.kernel.org, stable@...nel.org,
	akpm@...ux-foundation.org, torvalds@...ux-foundation.org,
	stable-review@...nel.org, alan@...rguk.ukuu.org.uk
Subject: Re: [Stable-review] [28/55] [SCSI] fix crash in scsi_dispatch_cmd()

On Sun, Aug 07, 2011 at 06:51:24PM +0100, Ben Hutchings wrote:
> On Sun, 2011-08-07 at 18:50 +0100, Ben Hutchings wrote:
> > On Fri, 2011-08-05 at 17:01 -0700, Greg KH wrote:
> > > 2.6.32-longterm review patch.  If anyone has any objections, please let us know.
> > > 
> > > ------------------
> > > 
> > > From: James Bottomley <James.Bottomley@...senPartnership.com>
> > > 
> > > commit bfe159a51203c15d23cb3158fffdc25ec4b4dda1 upstream.
> > > 
> > > USB surprise removal of sr is triggering an oops in
> > > scsi_dispatch_command().  What seems to be happening is that USB is
> > > hanging on to a queue reference until the last close of the upper
> > > device, so the crash is caused by surprise remove of a mounted CD
> > > followed by attempted unmount.
> > [...]
> > 
> > This has been reported in 2.6.39.y and 3.0, but not in 2.6.32.y.
> 
> That is, AFAIK.

Oops, good catch, I've dropped this from the .32 and .33 queue now, it's
not needed there at all.

greg k-h
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