Ensure lock for unregisterActivityConfigurationListener

onServiceStarted is called from AM without WM lock.

Fix: 364692215
Test: build
Flag: EXEMPT bug fix
Change-Id: I368620c7e8b19f1e8b0a51f8f20190cfb534d105

1 files changed, 6 insertions, 1 deletions

diff --git a/services/core/java/com/android/server/wm/WindowProcessController.java b/services/core/java/com/android/server/wm/WindowProcessController.java
index b6b36c716a53..2957504ecff5 100644
--- a/services/core/java/com/android/server/wm/WindowProcessController.java
+++ b/services/core/java/com/android/server/wm/WindowProcessController.java
@@ -1926,7 +1926,12 @@ public class WindowProcessController extends ConfigurationContainer<Configuratio
                 // showing.
                 // If the configuration has been overridden by previous activity, empty it.
                 mIsActivityConfigOverrideAllowed = false;
-                unregisterActivityConfigurationListener();
+                // The call to `onServiceStarted` is not guarded with WM lock.
+                mAtm.mH.post(() -> {
+                    synchronized (mAtm.mGlobalLock) {
+                        unregisterActivityConfigurationListener();
+                    }
+                });
                 break;
             default:
                 break;