From a30f40ce343d429bd31a28a88a96338f9521485a Mon Sep 17 00:00:00 2001
From: ratok-mk <ratok.mk@gmail.com>
Date: Tue, 22 Feb 2022 17:21:36 +0100
Subject: [PATCH] Apply suggestions from code review
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Co-authored-by: Günther Foidl <gue@korporal.at>
---
 src/ImageSharp/Compression/Zlib/DeflaterEngine.cs | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/ImageSharp/Compression/Zlib/DeflaterEngine.cs b/src/ImageSharp/Compression/Zlib/DeflaterEngine.cs
index 4e8be3c50f..8b32ed20e4 100644
--- a/src/ImageSharp/Compression/Zlib/DeflaterEngine.cs
+++ b/src/ImageSharp/Compression/Zlib/DeflaterEngine.cs
@@ -483,14 +483,15 @@ namespace SixLabors.ImageSharp.Compression.Zlib
             int niceLength = Math.Min(this.niceLength, this.lookahead);
 
             int matchStrt = this.matchStart;
-            this.matchLen = Math.Max(this.matchLen, DeflaterConstants.MIN_MATCH - 1);
             int matchLength = this.matchLen;
+            matchLength  = Math.Max(matchLength, DeflaterConstants.MIN_MATCH - 1);
+            this.matchLen = matchLength;
 
-            int scanEndPosition = scan + matchLength;
-            if (scanEndPosition > scanMax)
+            if (scan > scanMax - matchLength)
             {
                 return false;
             }
+            int scanEndPosition = scan + matchLength;
 
             byte* pinnedWindow = this.pinnedWindowPointer;
             int scanStart = this.strstart;