From 0adcb4d02a55a7e82d4ccfcd4492447f7f94d4f5 Mon Sep 17 00:00:00 2001
From: Mark Jansen <mark.jansen@reactos.org>
Date: Sat, 4 Mar 2017 20:29:46 +0000
Subject: [PATCH] [APPHELP] Fix a possible read past the buffer in
 SdbpIsPathOnRemovableMedia.

svn path=/trunk/; revision=74062
---
 reactos/dll/appcompat/apphelp/layer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/reactos/dll/appcompat/apphelp/layer.c b/reactos/dll/appcompat/apphelp/layer.c
index ab15b2fce31..afe1ca3d5a0 100644
--- a/reactos/dll/appcompat/apphelp/layer.c
+++ b/reactos/dll/appcompat/apphelp/layer.c
@@ -109,7 +109,7 @@ BOOL SdbpIsPathOnRemovableMedia(PCWSTR Path)
 {
     WCHAR tmp[] = { 'A',':','\\',0 };
     ULONG type;
-    if (!Path)
+    if (!Path || Path[0] == UNICODE_NULL)
     {
         SHIM_ERR("Invalid argument\n");
         return FALSE;