[3.13] pythongh-139146: Check calloc() results in _testembed.c::test_pre_initialization_sys_options (pythonGH-139147) (python#139414)

pythongh-139146: Check `calloc()` results in `_testembed.c::test_pre_initialization_sys_options` (pythonGH-139147)
(cherry picked from commit 9c6a1f8)


Reported by: Dmitrii Chuprov <[email protected]>

Signed-off-by: Denis Sergeev <[email protected]>
Co-authored-by: Denis Sergeev <[email protected]>

Author: miss-islington

Programs/_testembed.c

@@ -359,8 +359,18 @@ static int test_pre_initialization_sys_options(void)
     size_t xoption_len = wcslen(static_xoption);
     wchar_t *dynamic_once_warnoption = \
              (wchar_t *) calloc(warnoption_len+1, sizeof(wchar_t));
+    if (dynamic_once_warnoption == NULL) {
+        error("out of memory allocating warnoption");
+        return 1;
+    }
     wchar_t *dynamic_xoption = \
              (wchar_t *) calloc(xoption_len+1, sizeof(wchar_t));
+    if (dynamic_xoption == NULL) {
+        free(dynamic_once_warnoption);
+        error("out of memory allocating xoption");
+        return 1;
+    }
+
     wcsncpy(dynamic_once_warnoption, static_warnoption, warnoption_len+1);
     wcsncpy(dynamic_xoption, static_xoption, xoption_len+1);