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[3.11] GH-101696: invalidate type version tag in _PyStaticType_Dealloc (GH-101697) (#101722)

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[3.11] GH-101696: invalidate type version tag in `_PyStaticType_Dealloc` (GH-101697).
(cherry picked from commit d9de079248)

Co-authored-by: Kumar Aditya <59607654+kumaraditya303@users.noreply.github.com>
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Erlend E. Aasland 2023-02-11 09:30:42 +01:00 • committed by GitHub
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Misc/NEWS.d/next/Core and Builtins/2023-02-08-17-13-31.gh-issue-101696.seJhTt.rst Normal file
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@ -0,0 +1 @@
Invalidate type version tag in ``_PyStaticType_Dealloc`` for static types, avoiding bug where a false cache hit could crash the interpreter. Patch by Kumar Aditya.

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Objects/typeobject.c
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@ -4080,6 +4080,8 @@ _PyStaticType_Dealloc(PyTypeObject *type)
}
type->tp_flags &= ~Py_TPFLAGS_READY;
type->tp_flags &= ~Py_TPFLAGS_VALID_VERSION_TAG;
type->tp_version_tag = 0;
}