Is this buffer overflow node.js?

var net = require("net");
console.log("waiting");
var server = net.createServer(function(socket){
	socket.on("data", function(d){
		console.log("[*] we are taliking to somebody");
		console.log("[*] data")
		console.log(d);
		var buf = new Buffer(10);
		d.copy(buf);
		console.log("[*] buffer:")
		console.log(buf);
		console.log(" ");
		socket.write("Server !O! is online!");
	});
});
server.listen(1111, '127.0.0.1');

import socket

buffer = "\x41"* 3000

sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.connect(('127.0.0.1', 1111))

sock.send(buffer)
print sock.recv(40)
sock.close()

waiting
[*] we are talking to somebody
[*] data
<Buffer 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 ...>
[*] buffer 
<Buffer 41 41 41 41 41 41 41 41 41 41>