New submission from Dino Viehland: The co_extra_freefuncs are stored in PyThreadState. When calling _PyEval_RequestCodeExtraIndex you are given a thread specific index. The code object can then lose it's last reference on a different thread, and the wrong free function can be called if users of the extra space have made calls to get their index in different orders.
This can also lead to crashes if the extra thread hasn't yet requested extra indexes either. ---------- assignee: dino.viehland components: Interpreter Core keywords: patch messages: 295467 nosy: brett.cannon, dino.viehland, yselivanov priority: normal severity: normal stage: patch review status: open title: co_extra_freefuncs is stored thread locally and can lead to crashes type: crash versions: Python 3.6 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue30604> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
