From 608b37232df44d90f5bc9950add7b2f609ab457c Mon Sep 17 00:00:00 2001
From: Harald Kuhr <harald.kuhr@gmail.com>
Date: Mon, 21 Aug 2023 13:09:11 +0200
Subject: [PATCH] #792: Guard against incorrect JPEG Huffman Table class

---
 .../com/twelvemonkeys/imageio/plugins/jpeg/HuffmanTable.java  | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/imageio/imageio-jpeg/src/main/java/com/twelvemonkeys/imageio/plugins/jpeg/HuffmanTable.java b/imageio/imageio-jpeg/src/main/java/com/twelvemonkeys/imageio/plugins/jpeg/HuffmanTable.java
index 8181cc48..add7c5b8 100644
--- a/imageio/imageio-jpeg/src/main/java/com/twelvemonkeys/imageio/plugins/jpeg/HuffmanTable.java
+++ b/imageio/imageio-jpeg/src/main/java/com/twelvemonkeys/imageio/plugins/jpeg/HuffmanTable.java
@@ -145,8 +145,8 @@ final class HuffmanTable extends Segment {
             }
 
             int c = temp >> 4;
-            if (c > 2) {
-                throw new IIOException("Unexpected JPEG Huffman Table class (> 2): " + c);
+            if (c > 1) {
+                throw new IIOException("Unexpected JPEG Huffman Table class (> 1): " + c);
             }
 
             table.tc[t][c] = true;