[issue34441] NULL dereference when issubclass() is called on a class with bogus __subclasses__

Change by Alexey Izbyshev : -- resolution: -> fixed stage: patch review -> resolved status: open -> closed ___ Python tracker ___

[issue34441] NULL dereference when issubclass() is called on a class with bogus __subclasses__

miss-islington added the comment: New changeset d1f0ccc7e65ef7abeab779f5d0aca2f18eb9b2a4 by Miss Islington (bot) in branch '3.7': bpo-34441: Fix ABC.__subclasscheck__ crash on classes with invalid __subclasses__ (GH-8835)

[issue34441] NULL dereference when issubclass() is called on a class with bogus __subclasses__

Berker Peksag added the comment: New changeset cdbf50cba1664f72ae6621a89c324a32fea70377 by Berker Peksag (Alexey Izbyshev) in branch 'master': bpo-34441: Fix ABC.__subclasscheck__ crash on classes with invalid __subclasses__ (GH-8835)

[issue34441] NULL dereference when issubclass() is called on a class with bogus __subclasses__

Change by miss-islington : -- pull_requests: +8314 ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe:

[issue34441] NULL dereference when issubclass() is called on a class with bogus __subclasses__

Change by Alexey Izbyshev : -- keywords: +patch pull_requests: +8310 stage: -> patch review ___ Python tracker ___ ___

[issue34441] NULL dereference when issubclass() is called on a class with bogus __subclasses__

New submission from Alexey Izbyshev : >>> from abc import ABCMeta >>> class S(metaclass=ABCMeta): ... __subclasses__ = None ... >>> issubclass(int, S) Segmentation fault (core dumped) This is the result of missing NULL check for 'subclasses' in _abc__abc_subclasscheck_impl