From 3bee42994d417290e2125ef54de6ca7d93cebcf1 Mon Sep 17 00:00:00 2001
From: Zain Nadeem <zainnadeemzainnadeem80@gmail.com>
Date: Wed, 24 Jun 2026 20:56:10 +0500
Subject: [PATCH] gh-151763: Fix NULL dereference in `os._path_normpath()`
 under OOM (GH-151779) (cherry picked from commit
 ce8b81fff4094bd0cfb0c57193135bfc904c0ca2)

Co-authored-by: Zain Nadeem <zainnadeemzainnadeem80@gmail.com>
---
 Modules/posixmodule.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index 4ead98f49ac7648..b7aa5781f8ccd44 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -5684,6 +5684,9 @@ os__path_normpath_impl(PyObject *module, path_t *path)
     else {
         result = PyUnicode_FromWideChar(norm_path, norm_len);
     }
+    if (result == NULL) {
+        return NULL;
+    }
     if (PyBytes_Check(path->object)) {
         Py_SETREF(result, PyUnicode_EncodeFSDefault(result));
     }