acquire critical section around tb_next

kumaraditya303 · kumaraditya303 · commit 13cec08033f4 · 2025-03-17T18:59:59.000Z
diff --git a/Python/traceback.c b/Python/traceback.c
@@ -172,7 +172,9 @@ traceback_tb_next_set_impl(PyTracebackObject *self, PyObject *value)
             PyErr_Format(PyExc_ValueError, "traceback loop detected");
             return -1;
         }
+        Py_BEGIN_CRITICAL_SECTION(cursor);
         cursor = cursor->tb_next;
+        Py_END_CRITICAL_SECTION();
     }
 
     Py_XSETREF(self->tb_next, (PyTracebackObject *)Py_XNewRef(value));

Original file line number	Diff line number	Diff line change
`@@ -172,7 +172,9 @@ traceback_tb_next_set_impl(PyTracebackObject self, PyObject value)`
`172`	`172`	`PyErr_Format(PyExc_ValueError, "traceback loop detected");`
`173`	`173`	`return -1;`
`174`	`174`	`}`
	`175`	`+ Py_BEGIN_CRITICAL_SECTION(cursor);`
`175`	`176`	`cursor = cursor->tb_next;`
	`177`	`+ Py_END_CRITICAL_SECTION();`
`176`	`178`	`}`
`177`	`179`
`178`	`180`	`Py_XSETREF(self->tb_next, (PyTracebackObject *)Py_XNewRef(value));`