--- a/fs/f2fs/extent_cache.c
+++ b/fs/f2fs/extent_cache.c
@@ -361,6 +361,9 @@ static struct extent_node *__attach_extent_node(struct f2fs_sb_info *sbi,
 	struct extent_tree_info *eti = &sbi->extent_tree[et->type];
 	struct extent_node *en;
 
+	if (!p || !*p)
+		return NULL;
+
 	en = f2fs_kmem_cache_alloc(extent_node_slab, GFP_ATOMIC, false, sbi);
 	if (!en)
 		return NULL;