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

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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>
This commit is contained in:
Lachlan McIlroy
2008-07-18 17:13:12 +10:00
committed by Niv Sardi
parent 6a617dd22b
commit c032bfcf46
1 changed files with 4 additions and 2 deletions
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6
fs/xfs/linux-2.6/xfs_super.c
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@@ -792,12 +792,14 @@ xfs_close_devices(
struct xfs_mount *mp) struct xfs_mount *mp)
{ {
if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) { 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_free_buftarg(mp->m_logdev_targp);
xfs_blkdev_put(mp->m_logdev_targp->bt_bdev); xfs_blkdev_put(logdev);
} }
if (mp->m_rtdev_targp) { if (mp->m_rtdev_targp) {
struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev;
xfs_free_buftarg(mp->m_rtdev_targp); 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); xfs_free_buftarg(mp->m_ddev_targp);
} }