From 92e5fabb55b4d96ef19d4c94ec53be9659aef58c Mon Sep 17 00:00:00 2001
From: Serge Gautherie <reactos-git_serge_171003@gautherie.fr>
Date: Fri, 7 Jun 2019 00:14:40 +0200
Subject: [PATCH] [BROWSEUI] Fix SHEnumClassesOfCategories() parameter
 validation. (#1622)

Addendum to fdfef818. CORE-11711
---
 dll/win32/browseui/shellbars/CSHEnumClassesOfCategories.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/dll/win32/browseui/shellbars/CSHEnumClassesOfCategories.cpp b/dll/win32/browseui/shellbars/CSHEnumClassesOfCategories.cpp
index 7f448a2f1ce..1a1803a334b 100644
--- a/dll/win32/browseui/shellbars/CSHEnumClassesOfCategories.cpp
+++ b/dll/win32/browseui/shellbars/CSHEnumClassesOfCategories.cpp
@@ -337,6 +337,9 @@ extern "C" HRESULT WINAPI SHEnumClassesOfCategories(ULONG cImplemented, CATID *p
 {
     HRESULT hr;
 
+    if (!out)
+        return E_INVALIDARG;
+
     hr = ShellObjectCreatorInit<CSHEnumClassesOfCategories>(
             cImplemented, pImplemented, cRequired, pRequired, IID_PPV_ARG(IEnumGUID, out));
     if (FAILED_UNEXPECTEDLY(hr))