pythongh-128759: fix data race in type_modified_unlocked

sobolevn · Jan 12, 2025 · a767905 · a767905
1 parent 5e65a1a
commit a767905
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/Objects/typeobject.c b/Objects/typeobject.c
@@ -1038,7 +1038,7 @@ type_modified_unlocked(PyTypeObject *type)
        We don't assign new version tags eagerly, but only as
        needed.
      */
-    if (type->tp_version_tag == 0) {
+    if (FT_ATOMIC_LOAD_UINT32_RELAXED(type->tp_version_tag) == 0) {
         return;
     }
     // Cannot modify static builtin types.