From 6e1e78054060ad326f26dd8dbf12adfedbb52883 Mon Sep 17 00:00:00 2001
From: sobolevn <mail@sobolevn.me>
Date: Mon, 13 Jan 2025 10:40:52 +0300
Subject: gh-128759: fix data race in `type_modified_unlocked` (#128764)

---
 Objects/typeobject.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Objects/typeobject.c b/Objects/typeobject.c
index 680846f..0f5ebc6 100644
--- 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_UINT_RELAXED(type->tp_version_tag) == 0) {
         return;
     }
     // Cannot modify static builtin types.
-- 
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