Talloc context in audit_message_send is not created. So the memory is being allocated on the NULL context. Should not be an issue on production servers, as the message send code is only used for testing.
Created attachment 14758 [details] Patch for 4.9
Pushed to autobuild-v4-9-test.
(In reply to Karolin Seeger from comment #2) Pushed to v4-9-test. Closing out bug report. Thanks!