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

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Feb 11, 2023
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[3.11] GH-101696: invalidate type version tag in _PyStaticType_Dealloc (GH-101697) #101722

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1 change: 1 addition & 0 deletions Misc/NEWS.d/next/Core and Builtins/2023-02-08-17-13-31.gh-issue-101696.seJhTt.rst
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Original file line number Diff line number Diff line change
@@ -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.
2 changes: 2 additions & 0 deletions Objects/typeobject.c
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Expand Up @@ -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;
}


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