From e828c45bf2912294b3094f5ef21efdb09ece6df5 Mon Sep 17 00:00:00 2001
From: Sandy Stutsman <sstutsma@redhat.com>
Date: Mon, 2 Nov 2015 14:35:50 -0500
Subject: [PATCH] Use SrcPitch when calculating size of memory to map
 PresentDisplayOnly

Can result in a BSOD, as the image would be mapped only partially causing page faults when
accessing missing piece of the image.

Acked-by: Frediano Ziglio <fziglio@redhat.com>
---
 qxldod/QxlDod.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/qxldod/QxlDod.cpp b/qxldod/QxlDod.cpp
index 37650db..43cf8eb 100755
--- a/qxldod/QxlDod.cpp
+++ b/qxldod/QxlDod.cpp
@@ -3641,7 +3641,7 @@ QxlDevice::ExecutePresentDisplayOnly(
 
     {
         // Map Source into kernel space, as Blt will be executed by system worker thread
-        UINT sizeToMap = SrcBytesPerPixel * ctx->SrcWidth * ctx->SrcHeight;
+        UINT sizeToMap = ctx->SrcPitch * ctx->SrcHeight;
 
         PMDL mdl = IoAllocateMdl((PVOID)SrcAddr, sizeToMap,  FALSE, FALSE, NULL);
         if(!mdl)