linux-kernel - Re: [PATCH] block: blkdev_get() should acess ->bd

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Message-ID: <4DE5DC3A.4070303@kernel.dk>
Date:	Wed, 01 Jun 2011 08:29:14 +0200
From:	Jens Axboe <axboe@...nel.dk>
To:	Tejun Heo <tj@...nel.org>
CC:	linux-kernel@...r.kernel.org, davem@...emloft.net
Subject: Re: [PATCH] block: blkdev_get() should acess ->bd_disk only after
 success

On 2011-06-01 01:56, Tejun Heo wrote:
> d4dc210f69 (block: don't block events on excl write for non-optical
> devices) added dereferencing of bdev->bd_disk to test
> GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE; however, bdev->bd_disk can be
> %NULL if open failed which can lead to an oops.
> 
> Test the flag after testing open was successful, not before.

Thanks, applied.

-- 
Jens Axboe

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