[New-bugs-announce] [issue40515] test_ssl.py hangs with SSL 1.1 built with no threads

[Miguel]

New submission from Miguel <mig28suarez at hotmail.com>:

Hello, this is my first python bug report!

I've been running builds of Python 3.7.x on CentOS Linux release 7.7 (64bit/Intel Core
2 Duo) 
and I ran into hangs with test_ssl.py when using latest SSL 1.1.1d sources.

I've done a full compilation from source for Python 3.7.7 and SSL 1.1 in my
workspaces.

>From what I can tell the problem is when SSL 1.1 is built with no threading
there is no locking enabled by python.

This one line change will make the hangs in test_ssl.py  go away:

Index: Modules/_ssl.c

--- Modules/_ssl.c      (revision 70)
+++ Modules/_ssl.c      (working copy)
@@ -5875,7 +5875,7 @@
     if (!_setup_ssl_threads()) {
         return NULL;
     }
-#elif OPENSSL_VERSION_1_1 && defined(OPENSSL_THREADS)
+#elif OPENSSL_VERSION_1_1
     / OpenSSL 1.1.0 builtin thread support is enabled /
     _ssl_locks_count++;

# endif

There appears to be an assumption in _ssl.c and test_ssl.y that SSL 1.1 will be
threaded
but this may not be true (as in my case).

Appreciate any feedback. Thanks!

----------
assignee: christian.heimes
components: SSL
messages: 368143
nosy: christian.heimes, mig28suarez
priority: normal
severity: normal
status: open
title: test_ssl.py hangs with SSL 1.1 built with no threads
type: behavior
versions: Python 3.5, Python 3.6, Python 3.7, Python 3.8, Python 3.9

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue40515>
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