From: Stan Ulbrych <stan@python.org>
Date: Tue, 12 May 2026 18:35:27 +0000 (+0100)
Subject: [3.13] gh-145376: Fix various reference leaks (GH-145377) (#148661)
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ea8c3e028bca2080c476836b8a5edf0ceb3851b4;p=thirdparty%2FPython%2Fcpython.git

[3.13] gh-145376: Fix various reference leaks (GH-145377) (#148661)

(cherry picked from commit bd13cc09faaef01635aea85130f33aa8cbb8b177)

Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>
---

diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-28-16-46-17.gh-issue-145376.lG5u1a.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-02-28-16-46-17.gh-issue-145376.lG5u1a.rst
new file mode 100644
index 000000000000..a5a6908757e4
--- /dev/null
+++ b/Misc/NEWS.d/next/Core_and_Builtins/2026-02-28-16-46-17.gh-issue-145376.lG5u1a.rst
@@ -0,0 +1 @@
+Fix reference leaks in various unusual error scenarios.
diff --git a/Modules/main.c b/Modules/main.c
index 581c87270ff9..9d92ca0b2f9f 100644
--- a/Modules/main.c
+++ b/Modules/main.c
@@ -511,6 +511,7 @@ pymain_run_interactive_hook(int *exitcode)
     }
 
     if (PySys_Audit("cpython.run_interactivehook", "O", hook) < 0) {
+        Py_DECREF(hook);
         goto error;
     }
 
diff --git a/Python/pythonrun.c b/Python/pythonrun.c
index 632d2c56a676..0acb92e96ef9 100644
--- a/Python/pythonrun.c
+++ b/Python/pythonrun.c
@@ -1150,6 +1150,7 @@ _PyErr_Display(PyObject *file, PyObject *unused, PyObject *value, PyObject *tb)
 
     if (print_exception_fn == NULL || !PyCallable_Check(print_exception_fn)) {
         Py_DECREF(traceback_module);
+        Py_XDECREF(print_exception_fn);
         goto fallback;
     }
 
diff --git a/Python/sysmodule.c b/Python/sysmodule.c
index 8d47177340d7..261d0fdc002f 100644
--- a/Python/sysmodule.c
+++ b/Python/sysmodule.c
@@ -1782,7 +1782,7 @@ sys_getwindowsversion_impl(PyObject *module)
     PyObject *realVersion = _sys_getwindowsversion_from_kernel32();
     if (!realVersion) {
         if (!PyErr_ExceptionMatches(PyExc_WindowsError)) {
-            return NULL;
+            goto error;
         }
 
         PyErr_Clear();