diff --git a/kernel/early_res.c b/kernel/early_res.c
index 3cb2c661bb781ab5468a54e58a106cdb14269a7b..31aa9332ef3f8d4f5447f72a3989cbfd0dc7c6df 100644
--- a/kernel/early_res.c
+++ b/kernel/early_res.c
@@ -333,6 +333,12 @@ void __init free_early_partial(u64 start, u64 end)
 	struct early_res *r;
 	int i;
 
+	if (start == end)
+		return;
+
+	if (WARN_ONCE(start > end, "  wrong range [%#llx, %#llx]\n", start, end))
+		return;
+
 try_next:
 	i = find_overlapped_early(start, end);
 	if (i >= max_early_res)