commit 89ff31db581df98eb34f19471421f5cfcfb1cefd (HEAD -> master)
Author: Ray Strode <rstrode@redhat.com>
Date:   Fri Sep 27 15:31:03 2024 -0400

    internals: Root conversation and closure data

    If the conversation and closure data are not rooted to the class
    then they can be garbage collected before the conversation function
    is invoked.

    That leads to a crash in pam_lastlog during session open time.

    This commit addressed the issue by assigning the state to the class
    as properties.

diff --git a/src/pam/__internals.py b/src/pam/__internals.py
index 99a0397..9e33188 100644
--- a/src/pam/__internals.py
+++ b/src/pam/__internals.py
@@ -311,11 +311,11 @@ class PamAuthenticator:
 
         # do this up front so we can safely throw an exception if there's
         # anything wrong with it
-        app_data = {'msgs': self.messages, 'password': password, 'encoding': encoding}
-        conv = PamConv(__conv, c_void_p.from_buffer(py_object(app_data)))
+        self.app_data = {'msgs': self.messages, 'password': password, 'encoding': encoding}
+        self.conv = PamConv(__conv, c_void_p.from_buffer(py_object(self.app_data)))
 
         self.handle = PamHandle()
-        retval = self.pam_start(service, username, byref(conv),
+        retval = self.pam_start(service, username, byref(self.conv),
                                 byref(self.handle))
 
         if retval != PAM_SUCCESS:  # pragma: no cover