From 6f25887d5bbfce869b9a47c731ce1bac7d7d1249 Mon Sep 17 00:00:00 2001
From: Frederik Carlier <frederik.carlier@quamotion.mobi>
Date: Fri, 22 Sep 2017 08:46:12 +0200
Subject: [PATCH] Throw an exception when the filename length > MAX_PATH

Commit migrated from https://github.com/dotnet/corefx/commit/926c12917fac0e7d6ec2ed1ff25dd5f03ad0665a
---
 .../src/System/Drawing/Imaging/Metafile.Windows.cs                | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/libraries/System.Drawing.Common/src/System/Drawing/Imaging/Metafile.Windows.cs b/src/libraries/System.Drawing.Common/src/System/Drawing/Imaging/Metafile.Windows.cs
index 286ef7e..7a3c6b2 100644
--- a/src/libraries/System.Drawing.Common/src/System/Drawing/Imaging/Metafile.Windows.cs
+++ b/src/libraries/System.Drawing.Common/src/System/Drawing/Imaging/Metafile.Windows.cs
@@ -14,6 +14,9 @@ namespace System.Drawing.Imaging
     /// </summary>
     public sealed partial class Metafile : Image
     {
+        // GDI+ doesn't handle filenames over MAX_PATH very well
+        private const int MaxPath = 260;
+
         /// <summary>
         /// Initializes a new instance of the <see cref='Metafile'/> class from the specified handle and
         /// <see cref='WmfPlaceableFileHeader'/>.
@@ -300,6 +303,11 @@ namespace System.Drawing.Imaging
             // Called in order to emulate exception behavior from netfx related to invalid file paths.
             Path.GetFullPath(fileName);
 
+            if (fileName.Length > MaxPath)
+            {
+                throw new PathTooLongException();
+            }
+
             IntPtr metafile = IntPtr.Zero;
 
             GPRECTF rectf = new GPRECTF(frameRect);
-- 
2.7.4