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[3.11] gh-109534: fix reference leak when SSL handshake fails (GH-114074) (#114830)

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gh-109534: fix reference leak when SSL handshake fails (GH-114074)
(cherry picked from commit 80aa7b3688)

Co-authored-by: Jamie Phan <jamie@ordinarylab.dev>
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Miss Islington (bot) 2024-02-01 01:59:17 +01:00 • committed by GitHub
parent fe0f544f33
commit ef2ba9a007
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4
Lib/asyncio/selector_events.py
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@ -222,6 +222,10 @@ class BaseSelectorEventLoop(base_events.BaseEventLoop):
await waiter
except BaseException:
transport.close()
# gh-109534: When an exception is raised by the SSLProtocol object the
# exception set in this future can keep the protocol object alive and
# cause a reference cycle.
waiter = None
raise
# It's now up to the protocol to handle the connection.

1
Lib/asyncio/sslproto.py
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@ -579,6 +579,7 @@ class SSLProtocol(protocols.BufferedProtocol):
peercert = sslobj.getpeercert()
except Exception as exc:
handshake_exc = None
self._set_state(SSLProtocolState.UNWRAPPED)
if isinstance(exc, ssl.CertificateError):
msg = 'SSL handshake failed on verifying the certificate'

3
Misc/NEWS.d/next/Library/2024-01-15-18-42-44.gh-issue-109534.wYaLMZ.rst Normal file
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@ -0,0 +1,3 @@
Fix a reference leak in
:class:`asyncio.selector_events.BaseSelectorEventLoop` when SSL handshakes
fail. Patch contributed by Jamie Phan.