Issue #26754: PyUnicode_FSDecoder() accepted a filename argument encoded as

an iterable of integers. Now only strings and byte-like objects are accepted.

1 files changed, 7 insertions, 1 deletions

diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index f11a082..1fcc83e 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -3666,7 +3666,7 @@ PyUnicode_FSDecoder(PyObject* arg, void* addr)
         output = arg;
         Py_INCREF(output);
     }
-    else {
+    else if (PyObject_CheckBuffer(arg)) {
         arg = PyBytes_FromObject(arg);
         if (!arg)
             return 0;
@@ -3681,6 +3681,12 @@ PyUnicode_FSDecoder(PyObject* arg, void* addr)
             return 0;
         }
     }
+    else {
+        PyErr_Format(PyExc_TypeError,
+                     "path should be string or bytes, not %.200s",
+                     Py_TYPE(arg)->tp_name);
+        return 0;
+    }
     if (PyUnicode_READY(output) == -1) {
         Py_DECREF(output);
         return 0;