[3.14] gh-151763: Fix NULL dereference in os._path_normpath() under OOM (GH-151779) (#152095)

miss-islington · zainnadeem786 · web-flow · commit 45de3e041968 · 2026-06-24T16:23:16.000Z
(cherry picked from commit ce8b81f) Co-authored-by: Zain Nadeem <zainnadeemzainnadeem80@gmail.com>
diff --git 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));
     }

Original file line number	Diff line number	Diff line change
`@@ -5684,6 +5684,9 @@ os__path_normpath_impl(PyObject module, path_t path)`
`5684`	`5684`	`else {`
`5685`	`5685`	`result = PyUnicode_FromWideChar(norm_path, norm_len);`
`5686`	`5686`	`}`
	`5687`	`+ if (result == NULL) {`
	`5688`	`+ return NULL;`
	`5689`	`+ }`
`5687`	`5690`	`if (PyBytes_Check(path->object)) {`
`5688`	`5691`	`Py_SETREF(result, PyUnicode_EncodeFSDefault(result));`
`5689`	`5692`	`}`