diff --git a/core/java/android/app/UiAutomationConnection.java b/core/java/android/app/UiAutomationConnection.java
index 34f0964..9831885 100644
--- a/core/java/android/app/UiAutomationConnection.java
+++ b/core/java/android/app/UiAutomationConnection.java
@@ -183,6 +183,11 @@
 
     @Override
     public void injectInputEventToInputFilter(InputEvent event) throws RemoteException {
+        synchronized (mLock) {
+            throwIfCalledByNotTrustedUidLocked();
+            throwIfShutdownLocked();
+            throwIfNotConnectedLocked();
+        }
         mAccessibilityManager.injectInputEventToInputFilter(event);
     }
 
diff --git a/services/accessibility/java/com/android/server/accessibility/AccessibilityManagerService.java b/services/accessibility/java/com/android/server/accessibility/AccessibilityManagerService.java
index fdb28ba..5312279 100644
--- a/services/accessibility/java/com/android/server/accessibility/AccessibilityManagerService.java
+++ b/services/accessibility/java/com/android/server/accessibility/AccessibilityManagerService.java
@@ -5232,6 +5232,8 @@
 
     @Override
     public void injectInputEventToInputFilter(InputEvent event) {
+        mSecurityPolicy.enforceCallingPermission(Manifest.permission.INJECT_EVENTS,
+                "injectInputEventToInputFilter");
         synchronized (mLock) {
             final long endMillis =
                     SystemClock.uptimeMillis() + WAIT_INPUT_FILTER_INSTALL_TIMEOUT_MS;