From c032bfcf468013643e05c8274824af10dd7cbb61 Mon Sep 17 00:00:00 2001
From: Lachlan McIlroy <lachlan@sgi.com>
Date: Fri, 18 Jul 2008 17:13:12 +1000
Subject: [XFS] fix use after free with external logs or real-time devices

SGI-PV: 983806

SGI-Modid: xfs-linux-melb:xfs-kern:31666a

Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: Christoph Hellwig <hch@infradead.org>
---
 fs/xfs/linux-2.6/xfs_super.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

(limited to 'fs/xfs')

diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index b400866..30ae963 100644
--- a/fs/xfs/linux-2.6/xfs_super.c
+++ b/fs/xfs/linux-2.6/xfs_super.c
@@ -792,12 +792,14 @@ xfs_close_devices(
 	struct xfs_mount	*mp)
 {
 	if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
+		struct block_device *logdev = mp->m_logdev_targp->bt_bdev;
 		xfs_free_buftarg(mp->m_logdev_targp);
-		xfs_blkdev_put(mp->m_logdev_targp->bt_bdev);
+		xfs_blkdev_put(logdev);
 	}
 	if (mp->m_rtdev_targp) {
+		struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev;
 		xfs_free_buftarg(mp->m_rtdev_targp);
-		xfs_blkdev_put(mp->m_rtdev_targp->bt_bdev);
+		xfs_blkdev_put(rtdev);
 	}
 	xfs_free_buftarg(mp->m_ddev_targp);
 }
-- 
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