linux-kernel - Re: block: Fix oops caused by __blkdev_get() calling disk_unblock

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Message-ID: <20110309185909.GA13729@mtj.dyndns.org>
Date:	Wed, 9 Mar 2011 19:59:09 +0100
From:	Tejun Heo <tj@...nel.org>
To:	Jens Axboe <jaxboe@...ionio.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"kay.sievers@...y.org" <kay.sievers@...y.org>,
	"hch@...radead.org" <hch@...radead.org>
Subject: Re: block: Fix oops caused by __blkdev_get() calling
 disk_unblock_events() with invalid @disk

On Wed, Mar 09, 2011 at 07:26:44PM +0100, Jens Axboe wrote:
> >   This is fixed by moving reference putting after open success is
> >   determined and not clearing @disk to %NULL.  On success, @disk is
> >   valid because there is another opener holding reference to it.  On
> >   failure, the references are put after disk_unblock_events() is
> >   called.
> 
> Thanks, applied. A bit unfortunate to have a 100% crasher in the tree,
> though. Will suck for bisects.

Yeah, that does suck.  I folded in the fix to the offending commit and
regenerated the tree in case you want to rebase the tree.

  ssh://master.kernel.org/pub/scm/linux/kernel/git/tj/misc.git disk-event-convert-fixed

Thank you.

-- 
tejun
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