complain when nbytes > buflen to fix possible buffer overflow (closes #20246)
diff --git a/Lib/test/test_socket.py b/Lib/test/test_socket.py
index 4a60be3..c7ad121 100644
--- a/Lib/test/test_socket.py
+++ b/Lib/test/test_socket.py
@@ -1620,6 +1620,16 @@
_testRecvFromIntoMemoryview = _testRecvFromIntoArray
+ def testRecvFromIntoSmallBuffer(self):
+ # See issue #20246.
+ buf = bytearray(8)
+ self.assertRaises(ValueError, self.cli_conn.recvfrom_into, buf, 1024)
+
+ def _testRecvFromIntoSmallBuffer(self):
+ with test_support.check_py3k_warnings():
+ buf = buffer(MSG*2048)
+ self.serv_conn.send(buf)
+
TIPC_STYPE = 2000
TIPC_LOWER = 200