2 bytes length check

util/src/rlp/tests.rs

@@ -388,4 +388,19 @@ fn test_the_exact_long_string()
 
 	let as_val: Result<String, DecoderError> = rlp.as_val();
 	assert!(as_val.is_ok());
-}
+}
+
+#[test]
+fn test_rlp_2bytes_data_length_check()
+{
+	let mut data: Vec<u8> = vec![0xb9, 2, 255]; // 512+255
+	for _ in 0..700 {
+		data.push(b'c');
+	}
+
+	let rlp = UntrustedRlp::new(&data);
+
+	let as_val: Result<String, DecoderError> = rlp.as_val();
+	assert_eq!(Err(DecoderError::RlpInconsistentLengthAndData), as_val);
+}
+