From 6423a434a52219f424f803f6c15723bc3f27db7f Mon Sep 17 00:00:00 2001
From: Natalia Portillo <claunia@claunia.com>
Date: Tue, 17 Oct 2017 23:34:16 +0100
Subject: [PATCH] Do not overflow when decoded CopyQM image is bigger than
 expected.

---
 DiscImageChef.DiscImages/CopyQM.cs | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/DiscImageChef.DiscImages/CopyQM.cs b/DiscImageChef.DiscImages/CopyQM.cs
index c8c4fc48..ab91da48 100644
--- a/DiscImageChef.DiscImages/CopyQM.cs
+++ b/DiscImageChef.DiscImages/CopyQM.cs
@@ -295,9 +295,11 @@ namespace DiscImageChef.ImagePlugins
             // In case there is omitted data
 			long sectors = (header.sectorsPerTrack) * header.heads * header.totalCylinders;
 
-            byte[] filling = new byte[(sectors * header.sectorSize) - decodedImage.Length];
-            if(filling.Length > 0)
+			long fillingLen = (sectors * header.sectorSize) - decodedImage.Length;
+            
+            if(fillingLen > 0)
             {
+				byte[] filling = new byte[fillingLen];
                 ArrayHelpers.ArrayFill(filling, (byte)0xF6);
                 decodedImage.Write(filling, 0, filling.Length);
             }