[Python-checkins] bpo-33674: asyncio: Fix SSLProtocol race (GH-7175)
Victor Stinner
webhook-mailer at python.org
Mon May 28 19:33:38 EDT 2018
https://github.com/python/cpython/commit/be00a5583a2cb696335c527b921d1868266a42c6
commit: be00a5583a2cb696335c527b921d1868266a42c6
branch: master
author: Victor Stinner <vstinner at redhat.com>
committer: GitHub <noreply at github.com>
date: 2018-05-29T01:33:35+02:00
summary:
bpo-33674: asyncio: Fix SSLProtocol race (GH-7175)
Fix a race condition in SSLProtocol.connection_made() of
asyncio.sslproto: start immediately the handshake instead of using
call_soon(). Previously, data_received() could be called before the
handshake started, causing the handshake to hang or fail.
files:
A Misc/NEWS.d/next/Library/2018-05-28-22-49-59.bpo-33674.6LFFj7.rst
M Lib/asyncio/sslproto.py
diff --git a/Lib/asyncio/sslproto.py b/Lib/asyncio/sslproto.py
index 2bfa45dd1585..ab43e93b28bc 100644
--- a/Lib/asyncio/sslproto.py
+++ b/Lib/asyncio/sslproto.py
@@ -592,10 +592,10 @@ def _start_handshake(self):
# (b'', 1) is a special value in _process_write_backlog() to do
# the SSL handshake
self._write_backlog.append((b'', 1))
- self._loop.call_soon(self._process_write_backlog)
self._handshake_timeout_handle = \
self._loop.call_later(self._ssl_handshake_timeout,
self._check_handshake_timeout)
+ self._process_write_backlog()
def _check_handshake_timeout(self):
if self._in_handshake is True:
diff --git a/Misc/NEWS.d/next/Library/2018-05-28-22-49-59.bpo-33674.6LFFj7.rst b/Misc/NEWS.d/next/Library/2018-05-28-22-49-59.bpo-33674.6LFFj7.rst
new file mode 100644
index 000000000000..1e9868073f78
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2018-05-28-22-49-59.bpo-33674.6LFFj7.rst
@@ -0,0 +1,4 @@
+Fix a race condition in SSLProtocol.connection_made() of asyncio.sslproto:
+start immediately the handshake instead of using call_soon(). Previously,
+data_received() could be called before the handshake started, causing the
+handshake to hang or fail.
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