python
diff --git a/‎Misc/NEWS.d/next/Core_and_Builtins/2024-09-04-18-20-11.gh-issue-112275.W_iMiB.rst
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+3Lines changed: 3 additions & 0 deletions b/‎Misc/NEWS.d/next/Core_and_Builtins/2024-09-04-18-20-11.gh-issue-112275.W_iMiB.rst
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+3Lines changed: 3 additions & 0 deletions
diff --git a/‎Modules/posixmodule.c
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+5-5Lines changed: 5 additions & 5 deletions b/‎Modules/posixmodule.c
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+5-5Lines changed: 5 additions & 5 deletions
@@ -0,0 +1,3 @@
+A deadlock involving ``pystate.c``'s ``HEAD_LOCK`` in ``posixmodule.c``
+at fork is now fixed. Patch by ChuBoning based on previous Python 3.12
+fix by Victor Stinner.
@@ -603,6 +603,11 @@ PyOS_AfterFork_Child(void)
         goto fatal_error;
     }
 
+    status = _PyRuntimeState_ReInitThreads(runtime);
+    if (_PyStatus_EXCEPTION(status)) {
+        goto fatal_error;
+    }
+
     PyThreadState *tstate = _PyThreadState_GET();
     _Py_EnsureTstateNotNULL(tstate);
 
@@ -622,11 +627,6 @@ PyOS_AfterFork_Child(void)
 
     _PySignal_AfterFork();
 
-    status = _PyRuntimeState_ReInitThreads(runtime);
-    if (_PyStatus_EXCEPTION(status)) {
-        goto fatal_error;
-    }
-
     status = _PyInterpreterState_DeleteExceptMain(runtime);
     if (_PyStatus_EXCEPTION(status)) {
         goto fatal_error;