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authorGu Zheng <guz.fnst@cn.fujitsu.com>2013-07-31 13:53:29 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-07-31 14:41:02 -0700
commit62c610460d73fcfa5637cb497c6923ef1c42b12d (patch)
tree4bd1f444e4f1b15cb9d18e94bf1dfb4749c1e5aa /fs/ocfs2/refcounttree.c
parent3964acd0dbec123aa0a621973a2a0580034b4788 (diff)
downloadlinux-62c610460d73fcfa5637cb497c6923ef1c42b12d.tar.bz2
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>
Diffstat (limited to 'fs/ocfs2/refcounttree.c')
-rw-r--r--fs/ocfs2/refcounttree.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/ocfs2/refcounttree.c b/fs/ocfs2/refcounttree.c
index 998b17eda09d..9f6b96a09615 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