1 files changed, 9 insertions, 5 deletions
diff --git a/core/java/android/app/Notification.java b/core/java/android/app/Notification.java
index 47118a81632e..2931f33e4cc4 100644
--- a/core/java/android/app/Notification.java
+++ b/core/java/android/app/Notification.java
@@ -2576,10 +2576,12 @@ public class Notification implements Parcelable
             PendingIntent.setOnMarshaledListener(
                     (PendingIntent intent, Parcel out, int outFlags) -> {
                 if (parcel == out) {
-                    if (allPendingIntents == null) {
-                        allPendingIntents = new ArraySet<>();
+                    synchronized (this) {
+                        if (allPendingIntents == null) {
+                            allPendingIntents = new ArraySet<>();
+                        }
+                        allPendingIntents.add(intent);
                     }
-                    allPendingIntents.add(intent);
                 }
             });
         }
@@ -2587,8 +2589,10 @@ public class Notification implements Parcelable
             // IMPORTANT: Add marshaling code in writeToParcelImpl as we
             // want to intercept all pending events written to the parcel.
             writeToParcelImpl(parcel, flags);
-            // Must be written last!
-            parcel.writeArraySet(allPendingIntents);
+            synchronized (this) {
+                // Must be written last!
+                parcel.writeArraySet(allPendingIntents);
+            }
         } finally {
             if (collectPendingIntents) {
                 PendingIntent.setOnMarshaledListener(null);