From c84ffbae5e2e3f171287697b322a32e94f1d51b5 Mon Sep 17 00:00:00 2001
From: Brian Popow <popow@gmx.de>
Date: Mon, 23 Nov 2020 12:59:41 +0100
Subject: [PATCH] T4 decompression: Clear buffer at start

---
 src/ImageSharp/Formats/Tiff/Compression/T4TiffCompression.cs     | 1 +
 .../Formats/Tiff/Compression/TiffModifiedHuffmanCompression.cs   | 1 +
 2 files changed, 2 insertions(+)

diff --git a/src/ImageSharp/Formats/Tiff/Compression/T4TiffCompression.cs b/src/ImageSharp/Formats/Tiff/Compression/T4TiffCompression.cs
index 6aeb5af81e..6a064962b3 100644
--- a/src/ImageSharp/Formats/Tiff/Compression/T4TiffCompression.cs
+++ b/src/ImageSharp/Formats/Tiff/Compression/T4TiffCompression.cs
@@ -32,6 +32,7 @@ namespace SixLabors.ImageSharp.Formats.Tiff.Compression
 
             using var bitReader = new T4BitReader(stream, byteCount, this.Allocator);
 
+            buffer.Clear();
             uint bitsWritten = 0;
             while (bitReader.HasMoreData)
             {
diff --git a/src/ImageSharp/Formats/Tiff/Compression/TiffModifiedHuffmanCompression.cs b/src/ImageSharp/Formats/Tiff/Compression/TiffModifiedHuffmanCompression.cs
index 1201ab66a3..f742c11764 100644
--- a/src/ImageSharp/Formats/Tiff/Compression/TiffModifiedHuffmanCompression.cs
+++ b/src/ImageSharp/Formats/Tiff/Compression/TiffModifiedHuffmanCompression.cs
@@ -32,6 +32,7 @@ namespace SixLabors.ImageSharp.Formats.Tiff.Compression
 
             using var bitReader = new T4BitReader(stream, byteCount, this.Allocator, isModifiedHuffman: true);
 
+            buffer.Clear();
             uint bitsWritten = 0;
             uint pixelsWritten = 0;
             while (bitReader.HasMoreData)