From f59ea8fb2fe5f4809de49a43d13c9f90cd1a81c3 Mon Sep 17 00:00:00 2001
From: Thomas Faber <thomas.faber@reactos.org>
Date: Thu, 21 Jun 2012 23:43:24 +0000
Subject: [PATCH] [MSAFD] - Gracefully handle lpcbBytesReturned == NULL
 condition in WSPIoctl. Fixes crash in ws2_32:sock

svn path=/trunk/; revision=56782
---
 reactos/dll/win32/msafd/misc/dllmain.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/reactos/dll/win32/msafd/misc/dllmain.c b/reactos/dll/win32/msafd/misc/dllmain.c
index 806b9f12f67..380cc4a0111 100644
--- a/reactos/dll/win32/msafd/misc/dllmain.c
+++ b/reactos/dll/win32/msafd/misc/dllmain.c
@@ -1968,6 +1968,12 @@ WSPIoctl(IN  SOCKET Handle,
 	BOOLEAN NeedsCompletion;
     BOOLEAN NonBlocking;
 
+    if (!lpcbBytesReturned)
+    {
+       *lpErrno = WSAEFAULT;
+       return SOCKET_ERROR;
+    }
+
     /* Get the Socket Structure associate to this Socket*/
     Socket = GetSocketStructure(Handle);
     if (!Socket)