From 0cc482ee41d609811bd7b91abdbcd1c5dbdfb783 Mon Sep 17 00:00:00 2001
From: Guozhonghua <guozhonghua@h3c.com>
Date: Tue, 11 Oct 2016 13:51:01 -0700
Subject: [PATCH] ocfs2: fix memory leak in dlm_migrate_request_handler()

In the dlm_migrate_request_handler(), when `ret' is -EEXIST, the mle
should be freed, otherwise the memory will be leaked.

Link: http://lkml.kernel.org/r/71604351584F6A4EBAE558C676F37CA4A3D3522A@H3CMLB12-EX.srv.huawei-3com.com
Signed-off-by: Guozhonghua <guozhonghua@h3c.com>
Reviewed-by: Mark Fasheh <mfasheh@versity.com>
Cc: Eric Ren <zren@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Joseph Qi <joseph.qi@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 fs/ocfs2/dlm/dlmmaster.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/ocfs2/dlm/dlmmaster.c b/fs/ocfs2/dlm/dlmmaster.c
index 6ea06f8..3f828a1 100644
--- a/fs/ocfs2/dlm/dlmmaster.c
+++ b/fs/ocfs2/dlm/dlmmaster.c
@@ -3188,6 +3188,9 @@ int dlm_migrate_request_handler(struct o2net_msg *msg, u32 len, void *data,
 				    migrate->new_master,
 				    migrate->master);
 
+	if (ret < 0)
+		kmem_cache_free(dlm_mle_cache, mle);
+
 	spin_unlock(&dlm->master_lock);
 unlock:
 	spin_unlock(&dlm->spinlock);
-- 
2.7.4