From 62c610460d73fcfa5637cb497c6923ef1c42b12d Mon Sep 17 00:00:00 2001
From: Gu Zheng <guz.fnst@cn.fujitsu.com>
Date: Wed, 31 Jul 2013 13:53:29 -0700
Subject: ocfs2/refcounttree: add the missing NULL check of the return value of
find_or_create_page()
Add the missing NULL check of the return value of find_or_create_page() in
function ocfs2_duplicate_clusters_by_page().
[akpm@linux-foundation.org: fix layout, per Joel]
Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com>
Acked-by: Joel Becker <jlbec@evilplan.org>
Cc: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
fs/ocfs2/refcounttree.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/fs/ocfs2/refcounttree.c b/fs/ocfs2/refcounttree.c
index 998b17eda09..9f6b96a0961 100644
--- a/fs/ocfs2/refcounttree.c
+++ b/fs/ocfs2/refcounttree.c
@@ -2965,6 +2965,11 @@ int ocfs2_duplicate_clusters_by_page(handle_t *handle,
to = map_end & (PAGE_CACHE_SIZE - 1);
page = find_or_create_page(mapping, page_index, GFP_NOFS);
+ if (!page) {
+ ret = -ENOMEM;
+ mlog_errno(ret);
+ break;
+ }
/*
* In case PAGE_CACHE_SIZE <= CLUSTER_SIZE, This page
--
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