pythongh-128759: fix data race in type_modified_unlocked (pythonGH-…

…128764) (cherry picked from commit 6e1e780) Co-authored-by: sobolevn <[email protected]>
miss-islington · Jan 13, 2025 · 1919228 · 1919228
1 parent 33c0ba0
commit 1919228
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/Objects/typeobject.c b/Objects/typeobject.c
@@ -996,7 +996,7 @@ type_modified_unlocked(PyTypeObject *type)
        We don't assign new version tags eagerly, but only as
        needed.
      */
-    if (type->tp_version_tag == 0) {
+    if (_Py_atomic_load_uint_relaxed(type->tp_version_tag) == 0) {
         return;
     }
     // Cannot modify static builtin types.