https://github.com/python/cpython/commit/6e1e78054060ad326f26dd8dbf12adfedbb52883
commit: 6e1e78054060ad326f26dd8dbf12adfedbb52883
branch: main
author: sobolevn <[email protected]>
committer: sobolevn <[email protected]>
date: 2025-01-13T07:40:52Z
summary:
gh-128759: fix data race in `type_modified_unlocked` (#128764)
files:
M Objects/typeobject.c
diff --git a/Objects/typeobject.c b/Objects/typeobject.c
index 680846f1c0b865..0f5ebc6f90773d 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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