From 1fd8fbb550e7fe41984bcddc6fe2a37d2ec08e2b Mon Sep 17 00:00:00 2001
From: Thomas Faber <thomas.faber@reactos.org>
Date: Fri, 1 Jul 2016 17:19:04 +0000
Subject: [PATCH] [DNSAPI] - Check for NULL pointer in DnsQuery to avoid
 crashing tests

svn path=/trunk/; revision=71711
---
 reactos/dll/win32/dnsapi/dnsapi/query.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/reactos/dll/win32/dnsapi/dnsapi/query.c b/reactos/dll/win32/dnsapi/dnsapi/query.c
index 5dbbadf757b..fc7f9337887 100644
--- a/reactos/dll/win32/dnsapi/dnsapi/query.c
+++ b/reactos/dll/win32/dnsapi/dnsapi/query.c
@@ -59,6 +59,9 @@ DnsQuery_A(LPCSTR Name,
     LPSTR CurrentName;
     unsigned i, CNameLoop;
 
+    if (Name == NULL)
+        return ERROR_INVALID_PARAMETER;
+
     *QueryResultSet = 0;
 
     switch(Type)
@@ -200,6 +203,9 @@ DnsQuery_W(LPCWSTR Name,
     PDNS_RECORD QueryResultWide;
     PDNS_RECORD ConvertedRecord = 0, LastRecord = 0;
 
+    if (Name == NULL)
+        return ERROR_INVALID_PARAMETER;
+
     Buffer = DnsWToC(Name);
 
     Status = DnsQuery_A(Buffer, Type, Options, Servers, &QueryResultWide, Reserved);