From b3941e251ba1d5030195f06a73594848e892f76c Mon Sep 17 00:00:00 2001
From: Sean Owen <srowen@gmail.com>
Date: Mon, 30 Aug 2021 13:24:58 -0500
Subject: [PATCH] Possible fix for
 https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=37853

---
 .../main/java/com/google/zxing/maxicode/MaxiCodeReader.java   | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/core/src/main/java/com/google/zxing/maxicode/MaxiCodeReader.java b/core/src/main/java/com/google/zxing/maxicode/MaxiCodeReader.java
index 10319007c..1327215be 100644
--- a/core/src/main/java/com/google/zxing/maxicode/MaxiCodeReader.java
+++ b/core/src/main/java/com/google/zxing/maxicode/MaxiCodeReader.java
@@ -98,13 +98,13 @@ public final class MaxiCodeReader implements Reader {
     // Now just read off the bits
     BitMatrix bits = new BitMatrix(MATRIX_WIDTH, MATRIX_HEIGHT);
     for (int y = 0; y < MATRIX_HEIGHT; y++) {
-      int iy = top + (y * height + height / 2) / MATRIX_HEIGHT;
+      int iy = Math.min(top + (y * height + height / 2) / MATRIX_HEIGHT, height - 1);
       for (int x = 0; x < MATRIX_WIDTH; x++) {
         // srowen: I don't quite understand why the formula below is necessary, but it
         // can walk off the image if left + width = the right boundary. So cap it.
         int ix = left + Math.min(
           (x * width + width / 2 + (y & 0x01) * width / 2) / MATRIX_WIDTH,
-          width);
+          width - 1);
         if (image.get(ix, iy)) {
           bits.set(x, y);
         }