[BUG] java.lang.ArrayIndexOutOfBoundsException on decompilation

[rodrigoq]

Information

1. Apktool Version (apktool -version) - 2.12.0
2. Operating System (Mac, Linux, Windows) - Windows 10
3. APK From? (Playstore, ROM, Other) - Playstore
4. Java Version (java --version) - java 24.0.2 2025-07-15

If I use apktool 2.9.3 the decompilation goes further but fails anyways almost in the end.

Stacktrace/Logcat

I: Using Apktool 2.12.0 on base.apk with 4 threads
I: Baksmaling classes.dex...
I: Baksmaling classes12.dex...
I: Baksmaling classes10.dex...
I: Loading resource table...
I: Baksmaling classes11.dex...
I: Baksmaling classes13.dex...
I: Baksmaling classes14.dex...
I: Baksmaling classes15.dex...
I: Baksmaling classes16.dex...
I: Baksmaling classes17.dex...
I: Baksmaling classes18.dex...
I: Baksmaling classes19.dex...
I: Baksmaling classes20.dex...
I: Baksmaling classes2.dex...
I: Baksmaling classes3.dex...
I: Baksmaling classes4.dex...
I: Baksmaling classes5.dex...
I: Baksmaling classes6.dex...
I: Baksmaling classes8.dex...
I: Baksmaling classes7.dex...
I: Baksmaling classes9.dex...
I: Baksmaling assets/NIrmAdvjXkuR/VcNCngGdubzQdCnM.dex...
I: Decoding file-resources...
I: Loading resource table from file: C:\Users\Admin\AppData\Local\apktool\framework\1.apk
I: Decoding values */* XMLs...
I: Decoding AndroidManifest.xml with resources...
Exception in thread "main" java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.lang.ArrayIndexOutOfBoundsException: Index 13523608 out of bounds for length 160
        at brut.util.BackgroundWorker.waitForFinish(SourceFile:45)
        at brut.androlib.ApkDecoder.decode(SourceFile:88)
        at brut.apktool.Main.main(SourceFile:524)
Caused by: java.util.concurrent.ExecutionException: java.lang.ArrayIndexOutOfBoundsException: Index 13523608 out of bounds for length 160
        at java.base/java.util.concurrent.FutureTask.report(FutureTask.java:124)
        at java.base/java.util.concurrent.FutureTask.get(FutureTask.java:193)
        at brut.util.BackgroundWorker.waitForFinish(SourceFile:43)
        ... 2 more
Caused by: java.lang.ArrayIndexOutOfBoundsException: Index 13523608 out of bounds for length 160
        at com.android.tools.smali.dexlib2.dexbacked.DexBuffer.readSmallUint(SourceFile:53)
        at com.android.tools.smali.dexlib2.dexbacked.DexBackedDexFile.getMapItemForSection(SourceFile:277)
        at com.android.tools.smali.dexlib2.dexbacked.DexBackedDexFile.<init>(SourceFile:129)
        at com.android.tools.smali.dexlib2.dexbacked.ZipDexContainer.getEntries(SourceFile:104)
        at com.android.tools.smali.dexlib2.dexbacked.ZipDexContainer.getDexEntryNames(SourceFile:82)
        at brut.androlib.ApkDecoder.decodeSourcesSmaliJob(SourceFile:74)
        at brut.androlib.ApkDecoder.lambda$decodeSourcesSmali$0(SourceFile:169)
        at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:545)
        at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:328)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1095)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:619)
        at java.base/java.lang.Thread.run(Thread.java:1447)

Steps to Reproduce

1. apktool d base.apk

APK

https://drive.google.com/file/d/1z75gALAzL5g_CmZ3pMXZ0TeLTevyZUyy/view?usp=sharing

[Midorfeedwtf]

Yup same error on this one

https://play.google.com/store/apps/details?id=studio.gameberry.anv

and all a lot of of apk too
That not happened with apkeditor .
Hope its can be fixed

[iBotPeaches]

The issue is that the recent smali/baksmali releases enumerates all files in the container (apk) in order to identify the file we are trying to extract by name (i.e classes.dex).

The problem with that is bugged .dex files outside of the root are included in that scanning and some of those fail badly introspection and crash.

An upstream PR was merged in smali/baksmali - google/smali#91, so just waiting on a new release.

[yanszcruel-glitch]

+62 831-3104-6919