[Ocfs2-devel] [PATCH 4/5] ocfs2/dlm: copy lvb from lksb only when it's meaningful

[Wengang Wang]

Copies lvb from lksb only when it's meaningful(not NULL).

Signed-off-by: Wengang Wang <wen.gang.wang at oracle.com>
---
 fs/ocfs2/dlm/dlmrecovery.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/fs/ocfs2/dlm/dlmrecovery.c b/fs/ocfs2/dlm/dlmrecovery.c
index fa6e5ae..6d2e3ca 100644
--- a/fs/ocfs2/dlm/dlmrecovery.c
+++ b/fs/ocfs2/dlm/dlmrecovery.c
@@ -1184,7 +1184,8 @@ static void dlm_prepare_lvb_for_migration(struct dlm_lock *lock,
 		return;
 
 	if (dlm_lvb_is_empty(mres->lvb)) {
-		memcpy(mres->lvb, lock->lksb->lvb, DLM_LVB_LEN);
+		if (lock->lksb->lvb)
+			memcpy(mres->lvb, lock->lksb->lvb, DLM_LVB_LEN);
 		return;
 	}
 
-- 
1.7.2.1