Merge "Fix vulnerability in AttributionSource due to incorrect Binder call" into sc-dev am: accb88c894

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

Change-Id: I2cc31e4e246010022738e68ada1aceb175d803a4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

core/java/android/content/AttributionSource.java

@@ -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) {