From c032bfcf468013643e05c8274824af10dd7cbb61 Mon Sep 17 00:00:00 2001 From: Lachlan McIlroy Date: Fri, 18 Jul 2008 17:13:12 +1000 Subject: [PATCH] [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 Signed-off-by: Christoph Hellwig --- fs/xfs/linux-2.6/xfs_super.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c index b400866800..30ae96397e 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); } -- 2.39.5