[3.11] gh-116296: Fix refleak in reduce_newobj() corner case (GH-116297) (#116300)

(cherry picked from commit 17c4849981905fb1c9bfbb2b963b6ee12e3efb2c)

Co-authored-by: Erlend E. Aasland <erlend@python.org>
Co-authored-by: Brandt Bucher <brandtbucher@microsoft.com>

diff --git a/Misc/NEWS.d/next/Core and Builtins/2024-03-04-10-19-51.gh-issue-116296.gvtxyU.rst b/Misc/NEWS.d/next/Core and Builtins/2024-03-04-10-19-51.gh-issue-116296.gvtxyU.rst
new file mode 100644 (file)
index 0000000..0781e92
--- /dev/null
+++ b/Misc/NEWS.d/next/Core and Builtins/2024-03-04-10-19-51.gh-issue-116296.gvtxyU.rst
@@ -0,0 +1 @@
+Fix possible refleak in :meth:`!object.__reduce__` internal error handling.

diff --git a/Objects/typeobject.c b/Objects/typeobject.c
index 8c2e725cac9d2e2d0bdfd094dc8da84f8c2e39ff..9dfad5fa4389fa7ced06d639a6f42b068c8ee53f 100644 (file)
--- a/Objects/typeobject.c
+++ b/Objects/typeobject.c
@@ -5327,6 +5327,7 @@ reduce_newobj(PyObject *obj)
     }
     else {
         /* args == NULL */
+        Py_DECREF(copyreg);
         Py_DECREF(kwargs);
         PyErr_BadInternalCall();
         return NULL;