linux-kernel - [045/103] virtio-blk: fix request leak.

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Message-Id: <20101022185231.392088564@clark.site>
Date:	Fri, 22 Oct 2010 11:51:19 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Mike Snitzer <snitzer@...hat.com>,
	Rusty Russell <rusty@...tcorp.com.au>
Subject: [045/103] virtio-blk: fix request leak.

2.6.35-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Mike Snitzer <snitzer@...hat.com>

commit e4c4776dea9fd0295ebb3b215599d52938d6d7a3 upstream.

Must drop reference taken by blk_make_request().

Signed-off-by: Mike Snitzer <snitzer@...hat.com>
Signed-off-by: Rusty Russell <rusty@...tcorp.com.au>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/block/virtio_blk.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -203,6 +203,7 @@ static int virtblk_get_id(struct gendisk
 	struct virtio_blk *vblk = disk->private_data;
 	struct request *req;
 	struct bio *bio;
+	int err;
 
 	bio = bio_map_kern(vblk->disk->queue, id_str, VIRTIO_BLK_ID_BYTES,
 			   GFP_KERNEL);
@@ -216,7 +217,10 @@ static int virtblk_get_id(struct gendisk
 	}
 
 	req->cmd_type = REQ_TYPE_SPECIAL;
-	return blk_execute_rq(vblk->disk->queue, vblk->disk, req, false);
+	err = blk_execute_rq(vblk->disk->queue, vblk->disk, req, false);
+	blk_put_request(req);
+
+	return err;
 }
 
 static int virtblk_ioctl(struct block_device *bdev, fmode_t mode,


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