New submission from STINNER Victor <vstin...@redhat.com>:
While debugging bpo-32458 (functional test on START TLS), I found a race condition in SSLProtocol of asyncio/sslproto.py. Sometimes, _sslpipe.feed_ssldata() is called before _sslpipe.shutdown(). * SSLProtocol.connection_made() -> SSLProtocol._start_handshake(): self._loop.call_soon(self._process_write_backlog) * SSLProtoco.data_received(): direct call to self._sslpipe.feed_ssldata(data) * Later, self._process_write_backlog() calls self._sslpipe.do_handshake() The first write is delayed by call_soon(), whereas the first read is a direct call to the SSL pipe. ---------- components: asyncio messages: 317916 nosy: asvetlov, vstinner, yselivanov priority: normal severity: normal status: open title: asyncio: race condition in SSLProtocol versions: Python 3.8 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue33674> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
