[XFS] fix use after free with external logs or real-time devices

[linux-2.6-omap-h63xx.git] / fs / xfs / linux-2.6 / xfs_super.c

diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index b400866800474d25fbac0448f1aeb8a005e33929..30ae96397e318854ab0eb93ecc124916e04bfde5 100644 (file)
--- 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);
 }