del ssl.SSLContext().keylog_filename crashes

[serhiy-storchaka]

Crash report

import ssl
ctx = ssl.SSLContext(ssl.PROTOCOL_TLS_CLIENT)
del ctx.keylog_filename

_PySSLContext_set_keylog_filename() in Modules/_ssl/debughelpers.c does not check the value for NULL and passes it to Py_fopen().
It should raise an AttributeError instead, like the setters generated by Argument Clinic in Modules/_ssl.c.

The same code is in 3.13, 3.14 and 3.15.

Linked PRs

• gh-156099: Fix a crash when deleting SSLContext.keylog_filename #156103
• [3.15] gh-156099: Fix a crash when deleting SSLContext.keylog_filename (GH-156103) #156148
• [3.14] gh-156099: Fix a crash when deleting SSLContext.keylog_filename (GH-156103) #156149
• [3.13] gh-156099: Fix a crash when deleting SSLContext.keylog_filename (GH-156103) #156150