diff --git a/Lib/asyncio/sslproto.py b/Lib/asyncio/sslproto.py
@@ -6,6 +6,8 @@
    ssl = None

from . import base_events
from . import protocols
from . import transports
from .log import logger
@@ -407,7 +409,7 @@ class SSLProtocol(protocols.Protocol):

    def __init__(self, loop, app_protocol, sslcontext, waiter,
                 server_side=False, server_hostname=None,
-                 call_connection_made=True):
        if ssl is None:
            raise RuntimeError('stdlib ssl module not available')

@@ -438,6 +440,8 @@ def __init__(self, loop, app_protocol, sslcontext, waiter,
        self._session_established = False
        self._in_handshake = False
        self._in_shutdown = False
        # transport, ex: SelectorSocketTransport
        self._transport = None
        self._call_connection_made = call_connection_made
@@ -552,6 +556,15 @@ def _start_shutdown(self):
            self._in_shutdown = True
            self._write_appdata(b'')

    def _write_appdata(self, data):
        self._write_backlog.append((data, 0))
        self._write_buffer_size += len(data)
@@ -679,12 +692,22 @@ def _fatal_error(self, exc, message='Fatal error on transport'):
            })
        if self._transport:
            self._transport._force_close(exc)

    def _finalize(self):
        self._sslpipe = None

        if self._transport is not None:
            self._transport.close()

    def _abort(self):
        try:

diff --git a/Lib/test/test_asyncio/test_sslproto.py b/Lib/test/test_asyncio/test_sslproto.py
@@ -96,6 +96,40 @@ def test_connection_lost(self):
        test_utils.run_briefly(self.loop)
        self.assertIsInstance(waiter.exception(), ConnectionAbortedError)

    def test_close_during_handshake(self):
        # bpo-29743 Closing transport during handshake process leaks socket
        waiter = asyncio.Future(loop=self.loop)

diff --git a/Misc/NEWS b/Misc/NEWS
@@ -356,6 +356,10 @@ Library
- bpo-29743: Closing transport during handshake process leaks open socket.
  Patch by Nikolay Kim

- bpo-27585: Fix waiter cancellation in asyncio.Lock.
  Patch by Mathieu Sornay.