chore: resolve comment

Author: fatelei

Lib/test/test_bytes.py

@@ -2617,10 +2617,7 @@ def ass_subscript(b, a):  # MODIFIES!
 
         def ass_subscript2(b, a, c):  # MODIFIES!
             b.wait()
-            try:
-                a[:] = c
-            except BufferError:
-                return
+            a[:] = c
             assert b'\xdd' not in a
 
         def mod(b, a):

Misc/NEWS.d/next/Library/2025-12-11-22-59-33.gh-issue-142560.GkJrkk.rst

@@ -1,3 +1 @@
-Fix a potential use‑after‑free in :class:`bytearray` search‑like methods by
-exporting the instance's buffer to prevent reallocation during the
-operation.
+Fix a potential use‑after‑free in :class:`bytearray` search‑like methods by exporting the instance's buffer to prevent reallocation during the operation.

Objects/bytearrayobject.c

@@ -100,16 +100,10 @@ _bytearray_with_buffer(PyByteArrayObject *self, PyObject *sub,
 {
     PyObject *res;
 
-    Py_BEGIN_CRITICAL_SECTION(self);
     self->ob_exports++;
-    Py_END_CRITICAL_SECTION();
-
     res = op(PyByteArray_AS_STRING(self), Py_SIZE(self), sub, start, end);
-
-    Py_BEGIN_CRITICAL_SECTION(self);
     self->ob_exports--;
-    assert(self->ob_exports >= 0);
-    Py_END_CRITICAL_SECTION();
+
     return res;
 }