microg/GmsCore · error · RuntimeException

Overread allowed size end=

Error message

Overread allowed size end=

What it means

Corrupt-parcel guard in SafeParcelReflectionUtil.readObject: after consuming all recognized fields, the parcel's data position exceeds the end offset declared in the object header, so a field was over-read and the stream is inconsistent. The allowed end offset is appended.

Source

Thrown at play-services-basement/src/main/java/org/microg/safeparcel/SafeParcelReflectionUtil.java:102

        int end = SafeParcelReader.readObjectHeader(parcel);
        while (parcel.dataPosition() < end) {
            int header = SafeParcelReader.readHeader(parcel);
            int fieldId = SafeParcelReader.getFieldId(header);
            ClassDescriptor.FieldDescriptor fieldDescriptor = descriptor.fields.get(fieldId);
            if (fieldDescriptor == null) {
                Log.d(TAG, String.format("Unknown field id %d in %s, skipping.", fieldId, descriptor.tClass.getName()));
                SafeParcelReader.skip(parcel, header);
            } else {
                try {
                    readField(object, parcel, header, fieldDescriptor);
                } catch (Exception e) {
                    Log.w(TAG, String.format("Error reading field: %d of type %s in %s, skipping.", fieldId, fieldDescriptor.type, descriptor.tClass.getName()), e);
                    SafeParcelReader.skip(parcel, header);
                }
            }
        }
        if (parcel.dataPosition() > end) {
            throw new RuntimeException("Overread allowed size end=" + end);
        }
    }

    @SuppressWarnings("unchecked")
    private static Parcelable.Creator<Parcelable> getCreator(Field field) {
        Class<?> clazz = field.getType();
        if (clazz.isArray()) {
            clazz = clazz.getComponentType();
        }
        if (clazz != null && Parcelable.class.isAssignableFrom(clazz)) {
            return getCreator((Class<? extends Parcelable>) clazz);
        }
        throw new RuntimeException(clazz + " is not an Parcelable");
    }

    @SuppressWarnings("unchecked")
    public static Parcelable.Creator<Parcelable> getCreator(Class<? extends Parcelable> clazz) {
        try {

View on GitHub (pinned to 157c9d86ac)

Solutions

1. Ensure writer and reader agree on the field layout (field ids, sizes, types) of the parcelled class
2. Invalidate stored/transmitted parcels produced by an incompatible version

When it happens

Trigger: Thrown at play-services-basement/src/main/java/org/microg/safeparcel/SafeParcelReflectionUtil.java:102 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of microg/GmsCore@157c9d86ac (2026-09-06). Data as JSON: /api/errors/57a8d67224689fc0. Report an issue: GitHub.