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Commit 512c1597 authored by Austin Borger's avatar Austin Borger Committed by Automerger Merge Worker
Browse files

Merge "Fix vulnerability in AttributionSource due to incorrect Binder call"... 

Merge "Fix vulnerability in AttributionSource due to incorrect Binder call" into tm-dev am: 4d354407

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/26389309



Change-Id: I6abf973dbc4bd82e7bbcf2d0a7928ceae1ef50e6
Signed-off-by: default avatarAutomerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
parents d329b516 4d354407

core/java/android/content/AttributionSource.java

+17 −3
Original line number Diff line number Diff line
@@ -31,6 +31,7 @@ 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;
@@ -87,6 +88,8 @@ 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);
@@ -154,10 +157,21 @@ public final class AttributionSource implements Parcelable { 
    AttributionSource(@NonNull Parcel in) {

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



        if (!Binder.isDirectlyHandlingTransaction()) {

            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) {