[3.11] GH-101696: invalidate type version tag in `_PyStaticType_Dealloc` (GH-101697...

[3.11] GH-101696: invalidate type version tag in `_PyStaticType_Dealloc` (GH-101697).
(cherry picked from commit d9de0792482d2ded364b0c7d2867b97a5da41b12)

Co-authored-by: Kumar Aditya <59607654+kumaraditya303@users.noreply.github.com>

diff --git a/Misc/NEWS.d/next/Core and Builtins/2023-02-08-17-13-31.gh-issue-101696.seJhTt.rst b/Misc/NEWS.d/next/Core and Builtins/2023-02-08-17-13-31.gh-issue-101696.seJhTt.rst
new file mode 100644 (file)
index 0000000..ff2bbb4
--- /dev/null
+++ b/Misc/NEWS.d/next/Core and Builtins/2023-02-08-17-13-31.gh-issue-101696.seJhTt.rst
@@ -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.

diff --git a/Objects/typeobject.c b/Objects/typeobject.c
index 9ee57105204e29fb7f4e86b21d29d4e58664736d..90c6425ffdfea571b8748c1bab6f90276458cf96 100644 (file)
--- a/Objects/typeobject.c
+++ b/Objects/typeobject.c
@@ -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;
 }