[reactos] 01/01: [BROWSEUI] Fix SHEnumClassesOfCategories() parameter validation. (#1622)

[Serge Gautherie]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=92e5fabb55b4d96ef19d4c...

commit 92e5fabb55b4d96ef19d4c94ec53be9659aef58c
Author:     Serge Gautherie [e-mail]
AuthorDate: Fri Jun 7 00:14:40 2019 +0200
Commit:     Hermès Bélusca-Maïto [e-mail]
CommitDate: Sat Jun 8 20:05:54 2019 +0200

[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 7f448a2f1c..1a1803a334 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))