diff --git a/fs/f2fs/iostat.c b/fs/f2fs/iostat.c
index 3166a8939ed4f..02393c95c9f86 100644
--- a/fs/f2fs/iostat.c
+++ b/fs/f2fs/iostat.c
@@ -227,8 +227,12 @@ static inline void __update_iostat_latency(struct bio_iostat_ctx *iostat_ctx,
 		return;
 
 	ts_diff = jiffies - iostat_ctx->submit_ts;
-	if (iotype >= META_FLUSH)
+	if (iotype == META_FLUSH) {
 		iotype = META;
+	} else if (iotype >= NR_PAGE_TYPE) {
+		f2fs_warn(sbi, "%s: %d over NR_PAGE_TYPE", __func__, iotype);
+		return;
+	}
 
 	if (rw == 0) {
 		idx = READ_IO;