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-rw-r--r--fs/ocfs2/aops.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
index 50bb561860df..0f04b707f67f 100644
--- a/fs/ocfs2/aops.c
+++ b/fs/ocfs2/aops.c
@@ -1748,8 +1748,8 @@ int ocfs2_write_begin_nolock(struct address_space *mapping,
* we know zeros will only be needed in the first and/or last cluster.
*/
if (clusters_to_alloc || extents_to_split ||
- wc->w_desc[0].c_needs_zero ||
- wc->w_desc[wc->w_clen - 1].c_needs_zero)
+ (wc->w_clen && (wc->w_desc[0].c_needs_zero ||
+ wc->w_desc[wc->w_clen - 1].c_needs_zero)))
cluster_of_pages = 1;
else
cluster_of_pages = 0;