[issue22560] New SSL implementation based on ssl.MemoryBIO

[STINNER Victor]

STINNER Victor added the comment:

While I tried to write an unit test to reproduce a bug (cancelled waiter), I noticed that the handshake callback of the protocol can be called indirectly from _process_write_backlog(). So _process_write_backlog() may be called indirectly from _process_write_backlog(), whereas this function doesn't support reentrant call.

A fix is to modify the handshake callback to schedule a call to _process_write_backlog(), instead of calling it immediatly.

Note: The shutdown callback doesn't have this issue, it only calls transport.close().

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue22560>
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