Possible fix for https://bugs.chromium.org/p/oss-fuzz/issues/detail?i…

…d=50397
zxing · Aug 18, 2022 · e21bcbb · e21bcbb
1 parent 7fe6d3c
commit e21bcbb
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/core/src/main/java/com/google/zxing/pdf417/decoder/DecodedBitStreamParser.java b/core/src/main/java/com/google/zxing/pdf417/decoder/DecodedBitStreamParser.java
@@ -321,6 +321,9 @@ private static int textCompaction(int[] codewords, int codeIndex, ECIStringBuild
           case ECI_CHARSET:
             subMode = decodeTextCompaction(textCompactionData, byteCompactionData, index, result, subMode);
             result.appendECI(codewords[codeIndex++]);
+            if (codeIndex > codewords[0]) {
+              throw FormatException.getFormatInstance();
+            }
             textCompactionData = new int[(codewords[0] - codeIndex) * 2];
             byteCompactionData = new int[(codewords[0] - codeIndex) * 2];
             index = 0;