d_splice_alias() can return a valid dentry, NULL or an ERR_PTR.
Currently the code checks not for ERR_PTR and my oops in
ocfs2_dentry_attach_lock().
Fix this by using IS_ERR_OR_NULL().

Cc: Mark Fasheh <[email protected]>
Cc: Joel Becker <[email protected]>
Cc: [email protected]
Signed-off-by: Richard Weinberger <[email protected]>
---
 fs/ocfs2/namei.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c
index 8add6f1..b931e04 100644
--- a/fs/ocfs2/namei.c
+++ b/fs/ocfs2/namei.c
@@ -158,7 +158,7 @@ bail_add:
                 * NOTE: This dentry already has ->d_op set from
                 * ocfs2_get_parent() and ocfs2_get_dentry()
                 */
-               if (ret)
+               if (!IS_ERR_OR_NULL(ret))
                        dentry = ret;
 
                status = ocfs2_dentry_attach_lock(dentry, inode,
-- 
2.1.0

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