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Commit 9bf35389 authored by Austin Borger's avatar Austin Borger Committed by Automerger Merge Worker
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Merge "Fix vulnerability in AttributionSource due to incorrect Binder call"... 

Merge "Fix vulnerability in AttributionSource due to incorrect Binder call" into sc-dev am: accb88c8 am: 7ec573b8

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21780041



Change-Id: If6ba5fc75a007430c859280bf658d22384f1e5d9
Signed-off-by: default avatarAutomerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
parents a3edb5c6 7ec573b8

core/java/android/content/AttributionSource.java

+17 −3
Original line number Diff line number Diff line
@@ -30,6 +30,7 @@ import android.os.Parcelable; 
import android.os.Process;

import android.permission.PermissionManager;

import android.util.ArraySet;

import android.util.Log;



import com.android.internal.annotations.Immutable;
@@ -86,6 +87,8 @@ import java.util.Set; 
 */

@Immutable

public final class AttributionSource implements Parcelable {

    private static final String TAG = "AttributionSource";



    private static final String DESCRIPTOR = "android.content.AttributionSource";



    private static final Binder sDefaultToken = new Binder(DESCRIPTOR);
@@ -153,10 +156,21 @@ public final class AttributionSource implements Parcelable { 
    AttributionSource(@NonNull Parcel in) {

        this(AttributionSourceState.CREATOR.createFromParcel(in));



        if (!Binder.isHandlingTransaction()) {

            Log.e(TAG, "Unable to verify calling UID #" + mAttributionSourceState.uid + " PID #"

                    + mAttributionSourceState.pid + " when not handling Binder transaction; "

                    + "clearing.");

            mAttributionSourceState.pid = -1;

            mAttributionSourceState.uid = -1;

            mAttributionSourceState.packageName = null;

            mAttributionSourceState.attributionTag = null;

            mAttributionSourceState.next = null;

        } else {

            // Since we just unpacked this object as part of it transiting a Binder

            // call, this is the perfect time to enforce that its UID and PID can be trusted

            enforceCallingUidAndPid();

        }

    }



    /** @hide */

    public AttributionSource(@NonNull AttributionSourceState attributionSourceState) {