From 68a6182188e2cf83f9c0647abc5f2446bbe2408d Mon Sep 17 00:00:00 2001
From: Alexandre Julliard <julliard@winehq.org>
Date: Wed, 4 Jul 2007 12:07:22 +0200
Subject: [PATCH] ntdll: Add check for null pointer in
 NtQuerySystemInformation(SystemModuleInformation).

---
 dlls/ntdll/nt.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/dlls/ntdll/nt.c b/dlls/ntdll/nt.c
index ed707c0a71a..a303dcfd77e 100644
--- a/dlls/ntdll/nt.c
+++ b/dlls/ntdll/nt.c
@@ -845,7 +845,8 @@ NTSTATUS WINAPI NtQuerySystemInformation(
         break;
     case SystemModuleInformation:
         /* FIXME: should be system-wide */
-        ret = LdrQueryProcessModuleInformation( SystemInformation, Length, &len );
+        if (!SystemInformation) ret = STATUS_ACCESS_VIOLATION;
+        else ret = LdrQueryProcessModuleInformation( SystemInformation, Length, &len );
         break;
     case SystemHandleInformation:
         {