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xfs: fix double-cleanup when CUI recovery fails 

Dan Carpenter reported a double-free of rcur if _defer_finish fails
while we're recovering CUI items.  Fix the error recovery to prevent
this.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Darrick J. Wong 2017-01-03 18:39:32 -08:00
parent 0c744ea4f7
commit 7a21272b08
1 changed files with 2 additions and 1 deletions
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3
fs/xfs/xfs_refcount_item.c
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@ -526,13 +526,14 @@ xfs_cui_recover(
xfs_refcount_finish_one_cleanup(tp, rcur, error);
error = xfs_defer_finish(&tp, &dfops, NULL);
if (error)
goto abort_error;
goto abort_defer;
set_bit(XFS_CUI_RECOVERED, &cuip->cui_flags);
error = xfs_trans_commit(tp);
return error;
abort_error:
xfs_refcount_finish_one_cleanup(tp, rcur, error);
abort_defer:
xfs_defer_cancel(&dfops);
xfs_trans_cancel(tp);
return error;