Merge cherrypicks of [17880608, 18842766, 18279994, 18670434, 18629266, 18715266, 18701369] into rvc-platform-release.android-platform-11.0.0_r21

Change-Id: I44ba821b2b0a3c474dc4675831ccf4d3364cb0a5

11 files changed, 379 insertions, 35 deletions

diff --git a/core/java/android/content/AbstractThreadedSyncAdapter.java b/core/java/android/content/AbstractThreadedSyncAdapter.java
index a086a308d0d9..da4ecdd8c1f2 100644
--- a/core/java/android/content/AbstractThreadedSyncAdapter.java
+++ b/core/java/android/content/AbstractThreadedSyncAdapter.java
@@ -21,6 +21,7 @@ import static com.android.internal.util.function.pooled.PooledLambda.obtainMessa
 import android.accounts.Account;
 import android.annotation.MainThread;
 import android.annotation.NonNull;
+import android.os.Binder;
 import android.os.Build;
 import android.os.Bundle;
 import android.os.Handler;
@@ -171,8 +172,20 @@ public abstract class AbstractThreadedSyncAdapter {
     }
 
     private class ISyncAdapterImpl extends ISyncAdapter.Stub {
+        private boolean isCallerSystem() {
+            final long callingUid = Binder.getCallingUid();
+            if (callingUid != Process.SYSTEM_UID) {
+                android.util.EventLog.writeEvent(0x534e4554, "203229608", -1, "");
+                return false;
+            }
+            return true;
+        }
+
         @Override
         public void onUnsyncableAccount(ISyncAdapterUnsyncableAccountCallback cb) {
+            if (!isCallerSystem()) {
+                return;
+            }
             Handler.getMain().sendMessage(obtainMessage(
                     AbstractThreadedSyncAdapter::handleOnUnsyncableAccount,
                     AbstractThreadedSyncAdapter.this, cb));
@@ -181,12 +194,16 @@ public abstract class AbstractThreadedSyncAdapter {
         @Override
         public void startSync(ISyncContext syncContext, String authority, Account account,
                 Bundle extras) {
+            if (!isCallerSystem()) {
+                return;
+            }
             if (ENABLE_LOG) {
                 if (extras != null) {
                     extras.size(); // Unparcel so its toString() will show the contents.
                 }
                 Log.d(TAG, "startSync() start " + authority + " " + account + " " + extras);
             }
+
             try {
                 final SyncContext syncContextClient = new SyncContext(syncContext);
 
@@ -242,6 +259,9 @@ public abstract class AbstractThreadedSyncAdapter {
 
         @Override
         public void cancelSync(ISyncContext syncContext) {
+            if (!isCallerSystem()) {
+                return;
+            }
             try {
                 // synchronize to make sure that mSyncThreads doesn't change between when we
                 // check it and when we use it
diff --git a/core/java/com/android/internal/notification/NotificationAccessConfirmationActivityContract.java b/core/java/com/android/internal/notification/NotificationAccessConfirmationActivityContract.java
index 4ce6f609ef73..fdf0e9046eef 100644
--- a/core/java/com/android/internal/notification/NotificationAccessConfirmationActivityContract.java
+++ b/core/java/com/android/internal/notification/NotificationAccessConfirmationActivityContract.java
@@ -17,6 +17,7 @@
 package com.android.internal.notification;
 
 import android.content.ComponentName;
+import android.content.Context;
 import android.content.Intent;
 
 public final class NotificationAccessConfirmationActivityContract {
@@ -25,13 +26,14 @@ public final class NotificationAccessConfirmationActivityContract {
             "com.android.settings.notification.NotificationAccessConfirmationActivity");
     public static final String EXTRA_USER_ID = "user_id";
     public static final String EXTRA_COMPONENT_NAME = "component_name";
-    public static final String EXTRA_PACKAGE_TITLE = "package_title";
 
-    public static Intent launcherIntent(int userId, ComponentName component, String packageTitle) {
+    /**
+     * Creates a launcher intent for NotificationAccessConfirmationActivity.
+     */
+    public static Intent launcherIntent(Context context, int userId, ComponentName component) {
         return new Intent()
                 .setComponent(COMPONENT_NAME)
                 .putExtra(EXTRA_USER_ID, userId)
-                .putExtra(EXTRA_COMPONENT_NAME, component)
-                .putExtra(EXTRA_PACKAGE_TITLE, packageTitle);
+                .putExtra(EXTRA_COMPONENT_NAME, component);
     }
 }
diff --git a/services/companion/java/com/android/server/companion/CompanionDeviceManagerService.java b/services/companion/java/com/android/server/companion/CompanionDeviceManagerService.java
index 2110061153bc..42f5aacf4f43 100644
--- a/services/companion/java/com/android/server/companion/CompanionDeviceManagerService.java
+++ b/services/companion/java/com/android/server/companion/CompanionDeviceManagerService.java
@@ -43,7 +43,6 @@ import android.content.Intent;
 import android.content.SharedPreferences;
 import android.content.pm.FeatureInfo;
 import android.content.pm.PackageInfo;
-import android.content.pm.PackageItemInfo;
 import android.content.pm.PackageManager;
 import android.net.NetworkPolicyManager;
 import android.os.Binder;
@@ -385,20 +384,12 @@ public class CompanionDeviceManagerService extends SystemService implements Bind
             String callingPackage = component.getPackageName();
             checkCanCallNotificationApi(callingPackage);
             int userId = getCallingUserId();
-            String packageTitle = BidiFormatter.getInstance().unicodeWrap(
-                    getPackageInfo(callingPackage, userId)
-                            .applicationInfo
-                            .loadSafeLabel(getContext().getPackageManager(),
-                                    PackageItemInfo.DEFAULT_MAX_LABEL_SIZE_PX,
-                                    PackageItemInfo.SAFE_LABEL_FLAG_TRIM
-                                            | PackageItemInfo.SAFE_LABEL_FLAG_FIRST_LINE)
-                            .toString());
-            long identity = Binder.clearCallingIdentity();
+            final long identity = Binder.clearCallingIdentity();
             try {
                 return PendingIntent.getActivity(getContext(),
                         0 /* request code */,
                         NotificationAccessConfirmationActivityContract.launcherIntent(
-                                userId, component, packageTitle),
+                                getContext(), userId, component),
                         PendingIntent.FLAG_IMMUTABLE | PendingIntent.FLAG_ONE_SHOT
                                 | PendingIntent.FLAG_CANCEL_CURRENT);
             } finally {
diff --git a/services/core/java/com/android/server/am/ActiveServices.java b/services/core/java/com/android/server/am/ActiveServices.java
index aa38fd1e6fc4..f22cb0b0db50 100644
--- a/services/core/java/com/android/server/am/ActiveServices.java
+++ b/services/core/java/com/android/server/am/ActiveServices.java
@@ -5005,10 +5005,16 @@ public final class ActiveServices {
             return true;
         }
 
-        final boolean isWhiteListedPackage =
-                mWhiteListAllowWhileInUsePermissionInFgs.contains(callingPackage);
-        if (isWhiteListedPackage) {
-            return true;
+        if (verifyPackage(callingPackage, callingUid)) {
+            final boolean isWhiteListedPackage =
+                    mWhiteListAllowWhileInUsePermissionInFgs.contains(callingPackage);
+            if (isWhiteListedPackage) {
+                return true;
+            }
+        } else {
+            EventLog.writeEvent(0x534e4554, "215003903", callingUid,
+                    "callingPackage:" + callingPackage + " does not belong to callingUid:"
+                    + callingUid);
         }
 
         // Is the calling UID a device owner app?
@@ -5047,4 +5053,21 @@ public final class ActiveServices {
         r.mAllowWhileInUsePermissionInFgs = false;
         r.mLastSetFgsRestrictionTime = 0;
     }
+
+    /**
+     * Checks if a given packageName belongs to a given uid.
+     * @param packageName the package of the caller
+     * @param uid the uid of the caller
+     * @return true or false
+     */
+    private boolean verifyPackage(String packageName, int uid) {
+        if (uid == ROOT_UID || uid == SYSTEM_UID) {
+            //System and Root are always allowed
+            return true;
+        }
+        final int userId = UserHandle.getUserId(uid);
+        final int packageUid = mAm.getPackageManagerInternalLocked()
+                .getPackageUid(packageName, PackageManager.MATCH_DEBUG_TRIAGED_MISSING, userId);
+        return UserHandle.isSameApp(uid, packageUid);
+    }
 }
diff --git a/services/core/java/com/android/server/connectivity/PacManager.java b/services/core/java/com/android/server/connectivity/PacManager.java
index f6ce2dc68b99..621c9c71df58 100644
--- a/services/core/java/com/android/server/connectivity/PacManager.java
+++ b/services/core/java/com/android/server/connectivity/PacManager.java
@@ -37,6 +37,7 @@ import android.os.SystemClock;
 import android.os.SystemProperties;
 import android.provider.Settings;
 import android.util.Log;
+import android.webkit.URLUtil;
 
 import com.android.internal.annotations.GuardedBy;
 import com.android.internal.util.TrafficStatsConstants;
@@ -215,8 +216,22 @@ public class PacManager {
      * @throws IOException if the URL is malformed, or the PAC file is too big.
      */
     private static String get(Uri pacUri) throws IOException {
-        URL url = new URL(pacUri.toString());
-        URLConnection urlConnection = url.openConnection(java.net.Proxy.NO_PROXY);
+        if (!URLUtil.isValidUrl(pacUri.toString()))  {
+            throw new IOException("Malformed URL:" + pacUri);
+        }
+
+        final URL url = new URL(pacUri.toString());
+        URLConnection urlConnection;
+        try {
+            urlConnection = url.openConnection(java.net.Proxy.NO_PROXY);
+            // Catch the possible exceptions and rethrow as IOException to not to crash the system
+            // for illegal input.
+        } catch (IllegalArgumentException e) {
+            throw new IOException("Incorrect proxy type for " + pacUri);
+        } catch (UnsupportedOperationException e) {
+            throw new IOException("Unsupported URL connection type for " + pacUri);
+        }
+
         long contentLength = -1;
         try {
             contentLength = Long.parseLong(urlConnection.getHeaderField("Content-Length"));
diff --git a/services/core/java/com/android/server/connectivity/Vpn.java b/services/core/java/com/android/server/connectivity/Vpn.java
index 9edb0e440baa..4c193746d88a 100644
--- a/services/core/java/com/android/server/connectivity/Vpn.java
+++ b/services/core/java/com/android/server/connectivity/Vpn.java
@@ -2516,6 +2516,9 @@ public class Vpn {
                         return; // VPN has been shut down.
                     }
 
+                    // Clear mInterface to prevent Ikev2VpnRunner being cleared when
+                    // interfaceRemoved() is called.
+                    mInterface = null;
                     // Without MOBIKE, we have no way to seamlessly migrate. Close on old
                     // (non-default) network, and start the new one.
                     resetIkeState();
diff --git a/services/core/java/com/android/server/notification/NotificationManagerService.java b/services/core/java/com/android/server/notification/NotificationManagerService.java
index 393fc848d4f4..91d9c319d499 100755
--- a/services/core/java/com/android/server/notification/NotificationManagerService.java
+++ b/services/core/java/com/android/server/notification/NotificationManagerService.java
@@ -224,6 +224,7 @@ import android.util.Log;
 import android.util.Pair;
 import android.util.Slog;
 import android.util.SparseArray;
+import android.util.SparseBooleanArray;
 import android.util.StatsEvent;
 import android.util.Xml;
 import android.util.proto.ProtoOutputStream;
@@ -254,6 +255,7 @@ import com.android.internal.util.FastXmlSerializer;
 import com.android.internal.util.Preconditions;
 import com.android.internal.util.XmlUtils;
 import com.android.internal.util.function.TriPredicate;
+import com.android.internal.widget.LockPatternUtils;
 import com.android.server.DeviceIdleInternal;
 import com.android.server.EventLogTags;
 import com.android.server.IoThread;
@@ -1712,6 +1714,54 @@ public class NotificationManagerService extends SystemService {
         return out;
     }
 
+    protected class StrongAuthTracker extends LockPatternUtils.StrongAuthTracker {
+
+        SparseBooleanArray mUserInLockDownMode = new SparseBooleanArray();
+        boolean mIsInLockDownMode = false;
+
+        StrongAuthTracker(Context context) {
+            super(context);
+        }
+
+        private boolean containsFlag(int haystack, int needle) {
+            return (haystack & needle) != 0;
+        }
+
+        public boolean isInLockDownMode() {
+            return mIsInLockDownMode;
+        }
+
+        @Override
+        public synchronized void onStrongAuthRequiredChanged(int userId) {
+            boolean userInLockDownModeNext = containsFlag(getStrongAuthForUser(userId),
+                    STRONG_AUTH_REQUIRED_AFTER_USER_LOCKDOWN);
+            mUserInLockDownMode.put(userId, userInLockDownModeNext);
+            boolean isInLockDownModeNext = mUserInLockDownMode.indexOfValue(true) != -1;
+
+            if (mIsInLockDownMode == isInLockDownModeNext) {
+                return;
+            }
+
+            if (isInLockDownModeNext) {
+                cancelNotificationsWhenEnterLockDownMode();
+            }
+
+            // When the mIsInLockDownMode is true, both notifyPostedLocked and
+            // notifyRemovedLocked will be dismissed. So we shall call
+            // cancelNotificationsWhenEnterLockDownMode before we set mIsInLockDownMode
+            // as true and call postNotificationsWhenExitLockDownMode after we set
+            // mIsInLockDownMode as false.
+            mIsInLockDownMode = isInLockDownModeNext;
+
+            if (!isInLockDownModeNext) {
+                postNotificationsWhenExitLockDownMode();
+            }
+        }
+    }
+
+    private LockPatternUtils mLockPatternUtils;
+    private StrongAuthTracker mStrongAuthTracker;
+
     public NotificationManagerService(Context context) {
         this(context,
                 new NotificationRecordLoggerImpl(),
@@ -1738,6 +1788,11 @@ public class NotificationManagerService extends SystemService {
     }
 
     @VisibleForTesting
+    void setStrongAuthTracker(StrongAuthTracker strongAuthTracker) {
+        mStrongAuthTracker = strongAuthTracker;
+    }
+
+    @VisibleForTesting
     void setKeyguardManager(KeyguardManager keyguardManager) {
         mKeyguardManager = keyguardManager;
     }
@@ -1924,6 +1979,8 @@ public class NotificationManagerService extends SystemService {
                 ServiceManager.getService(Context.PLATFORM_COMPAT_SERVICE));
 
         mUiHandler = new Handler(UiThread.get().getLooper());
+        mLockPatternUtils = new LockPatternUtils(getContext());
+        mStrongAuthTracker = new StrongAuthTracker(getContext());
         String[] extractorNames;
         try {
             extractorNames = resources.getStringArray(R.array.config_notificationSignalExtractors);
@@ -2119,7 +2176,8 @@ public class NotificationManagerService extends SystemService {
         init(handler, new RankingHandlerWorker(mRankingThread.getLooper()),
                 AppGlobals.getPackageManager(), getContext().getPackageManager(),
                 getLocalService(LightsManager.class),
-                new NotificationListeners(AppGlobals.getPackageManager()),
+                new NotificationListeners(getContext(), mNotificationLock, mUserProfiles,
+                        AppGlobals.getPackageManager()),
                 new NotificationAssistants(getContext(), mNotificationLock, mUserProfiles,
                         AppGlobals.getPackageManager()),
                 new ConditionProviders(getContext(), mUserProfiles, AppGlobals.getPackageManager()),
@@ -2361,6 +2419,7 @@ public class NotificationManagerService extends SystemService {
                 bubbsExtractor.setShortcutHelper(mShortcutHelper);
             }
             registerNotificationPreferencesPullers();
+            mLockPatternUtils.registerStrongAuthTracker(mStrongAuthTracker);
         } else if (phase == SystemService.PHASE_THIRD_PARTY_APPS_CAN_START) {
             // This observer will force an update when observe is called, causing us to
             // bind to listener services.
@@ -8533,6 +8592,29 @@ public class NotificationManagerService extends SystemService {
         }
     }
 
+    private void cancelNotificationsWhenEnterLockDownMode() {
+        synchronized (mNotificationLock) {
+            int numNotifications = mNotificationList.size();
+            for (int i = 0; i < numNotifications; i++) {
+                NotificationRecord rec = mNotificationList.get(i);
+                mListeners.notifyRemovedLocked(rec, REASON_CANCEL_ALL,
+                        rec.getStats());
+            }
+
+        }
+    }
+
+    private void postNotificationsWhenExitLockDownMode() {
+        synchronized (mNotificationLock) {
+            int numNotifications = mNotificationList.size();
+            for (int i = 0; i < numNotifications; i++) {
+                NotificationRecord rec = mNotificationList.get(i);
+                mListeners.notifyPostedLocked(rec, rec);
+            }
+
+        }
+    }
+
     private void updateNotificationPulse() {
         synchronized (mNotificationLock) {
             updateLightsLocked();
@@ -8776,6 +8858,10 @@ public class NotificationManagerService extends SystemService {
                 rankings.toArray(new NotificationListenerService.Ranking[0]));
     }
 
+    boolean isInLockDownMode() {
+        return mStrongAuthTracker.isInLockDownMode();
+    }
+
     boolean hasCompanionDevice(ManagedServiceInfo info) {
         if (mCompanionManager == null) {
             mCompanionManager = getCompanionManager();
@@ -9356,8 +9442,9 @@ public class NotificationManagerService extends SystemService {
 
         private final ArraySet<ManagedServiceInfo> mLightTrimListeners = new ArraySet<>();
 
-        public NotificationListeners(IPackageManager pm) {
-            super(getContext(), mNotificationLock, mUserProfiles, pm);
+        public NotificationListeners(Context context, Object lock, UserProfiles userProfiles,
+                IPackageManager pm) {
+            super(context, lock, userProfiles, pm);
         }
 
         @Override
@@ -9491,8 +9578,12 @@ public class NotificationManagerService extends SystemService {
          *                           targetting <= O_MR1
          */
         @GuardedBy("mNotificationLock")
-        private void notifyPostedLocked(NotificationRecord r, NotificationRecord old,
+        void notifyPostedLocked(NotificationRecord r, NotificationRecord old,
                 boolean notifyAllListeners) {
+            if (isInLockDownMode()) {
+                return;
+            }
+
             try {
                 // Lazily initialized snapshots of the notification.
                 StatusBarNotification sbn = r.getSbn();
@@ -9589,6 +9680,10 @@ public class NotificationManagerService extends SystemService {
         @GuardedBy("mNotificationLock")
         public void notifyRemovedLocked(NotificationRecord r, int reason,
                 NotificationStats notificationStats) {
+            if (isInLockDownMode()) {
+                return;
+            }
+
             final StatusBarNotification sbn = r.getSbn();
 
             // make a copy in case changes are made to the underlying Notification object
@@ -9634,6 +9729,10 @@ public class NotificationManagerService extends SystemService {
          */
         @GuardedBy("mNotificationLock")
         public void notifyRankingUpdateLocked(List<NotificationRecord> changedHiddenNotifications) {
+            if (isInLockDownMode()) {
+                return;
+            }
+
             boolean isHiddenRankingUpdate = changedHiddenNotifications != null
                     && changedHiddenNotifications.size() > 0;
 
diff --git a/services/core/java/com/android/server/wm/Task.java b/services/core/java/com/android/server/wm/Task.java
index 1887cb73848b..0d1a3436d4cc 100644
--- a/services/core/java/com/android/server/wm/Task.java
+++ b/services/core/java/com/android/server/wm/Task.java
@@ -961,27 +961,20 @@ class Task extends WindowContainer<WindowContainer> {
             mCallingPackage = r.launchedFromPackage;
             mCallingFeatureId = r.launchedFromFeatureId;
             setIntent(intent != null ? intent : r.intent, info != null ? info : r.info);
-            final WindowContainer parent = getParent();
-            if (parent != null) {
-                final Task t = parent.asTask();
-                if (t != null) {
-                    t.setIntent(r);
-                }
-            }
         }
         setLockTaskAuth(r);
     }
 
     /** Sets the original intent, _without_ updating the calling uid or package. */
     private void setIntent(Intent _intent, ActivityInfo info) {
-        final boolean isLeaf = isLeafTask();
+        if (!isLeafTask()) return;
         if (intent == null) {
             mNeverRelinquishIdentity = (info.flags & FLAG_RELINQUISH_TASK_IDENTITY) == 0;
-        } else if (mNeverRelinquishIdentity && isLeaf) {
+        } else if (mNeverRelinquishIdentity) {
             return;
         }
 
-        affinity = isLeaf ? info.taskAffinity : null;
+        affinity = info.taskAffinity;
         if (intent == null) {
             // If this task already has an intent associated with it, don't set the root
             // affinity -- we don't want it changing after initially set, but the initially
diff --git a/services/tests/uiservicestests/AndroidManifest.xml b/services/tests/uiservicestests/AndroidManifest.xml
index 767857bf2de8..e8e3a8f84f21 100644
--- a/services/tests/uiservicestests/AndroidManifest.xml
+++ b/services/tests/uiservicestests/AndroidManifest.xml
@@ -33,6 +33,7 @@
     <uses-permission android:name="android.permission.OBSERVE_ROLE_HOLDERS" />
     <uses-permission android:name="android.permission.GET_INTENT_SENDER_INTENT"/>
     <uses-permission android:name="android.permission.WRITE_DEVICE_CONFIG" />
+    <uses-permission android:name="android.permission.ACCESS_KEYGUARD_SECURE_STORAGE" />
 
     <application android:debuggable="true">
         <uses-library android:name="android.test.runner" />
diff --git a/services/tests/uiservicestests/src/com/android/server/notification/NotificationListenersTest.java b/services/tests/uiservicestests/src/com/android/server/notification/NotificationListenersTest.java
new file mode 100644
index 000000000000..7244fcdda731
--- /dev/null
+++ b/services/tests/uiservicestests/src/com/android/server/notification/NotificationListenersTest.java
@@ -0,0 +1,133 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.server.notification;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.atLeast;
+import static org.mockito.Mockito.doNothing;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.reset;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.app.INotificationManager;
+import android.content.pm.IPackageManager;
+import android.content.pm.PackageManager;
+import android.service.notification.NotificationStats;
+import android.service.notification.StatusBarNotification;
+import android.testing.TestableContext;
+
+import com.android.server.UiServiceTestCase;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.mockito.internal.util.reflection.FieldSetter;
+
+import java.util.List;
+
+public class NotificationListenersTest extends UiServiceTestCase {
+
+    @Mock
+    private PackageManager mPm;
+    @Mock
+    private IPackageManager miPm;
+
+    @Mock
+    NotificationManagerService mNm;
+    @Mock
+    private INotificationManager mINm;
+    private TestableContext mContext = spy(getContext());
+
+    NotificationManagerService.NotificationListeners mListeners;
+
+    @Before
+    public void setUp() throws Exception {
+        MockitoAnnotations.initMocks(this);
+        getContext().setMockPackageManager(mPm);
+        doNothing().when(mContext).sendBroadcastAsUser(any(), any(), any());
+
+        mListeners = spy(mNm.new NotificationListeners(
+                mContext, new Object(), mock(ManagedServices.UserProfiles.class), miPm));
+        when(mNm.getBinderService()).thenReturn(mINm);
+    }
+
+
+    @Test
+    public void testNotifyPostedLockedInLockdownMode() {
+        NotificationRecord r = mock(NotificationRecord.class);
+        NotificationRecord old = mock(NotificationRecord.class);
+
+        // before the lockdown mode
+        when(mNm.isInLockDownMode()).thenReturn(false);
+        mListeners.notifyPostedLocked(r, old, true);
+        mListeners.notifyPostedLocked(r, old, false);
+        verify(r, atLeast(2)).getSbn();
+
+        // in the lockdown mode
+        reset(r);
+        reset(old);
+        when(mNm.isInLockDownMode()).thenReturn(true);
+        mListeners.notifyPostedLocked(r, old, true);
+        mListeners.notifyPostedLocked(r, old, false);
+        verify(r, never()).getSbn();
+    }
+
+    @Test
+    public void testnotifyRankingUpdateLockedInLockdownMode() {
+        List chn = mock(List.class);
+
+        // before the lockdown mode
+        when(mNm.isInLockDownMode()).thenReturn(false);
+        mListeners.notifyRankingUpdateLocked(chn);
+        verify(chn, atLeast(1)).size();
+
+        // in the lockdown mode
+        reset(chn);
+        when(mNm.isInLockDownMode()).thenReturn(true);
+        mListeners.notifyRankingUpdateLocked(chn);
+        verify(chn, never()).size();
+    }
+
+    @Test
+    public void testNotifyRemovedLockedInLockdownMode() throws NoSuchFieldException {
+        NotificationRecord r = mock(NotificationRecord.class);
+        NotificationStats rs = mock(NotificationStats.class);
+        StatusBarNotification sbn = mock(StatusBarNotification.class);
+        FieldSetter.setField(mNm,
+                NotificationManagerService.class.getDeclaredField("mHandler"),
+                mock(NotificationManagerService.WorkerHandler.class));
+
+        // before the lockdown mode
+        when(mNm.isInLockDownMode()).thenReturn(false);
+        when(r.getSbn()).thenReturn(sbn);
+        mListeners.notifyRemovedLocked(r, 0, rs);
+        mListeners.notifyRemovedLocked(r, 0, rs);
+        verify(r, atLeast(2)).getSbn();
+
+        // in the lockdown mode
+        reset(r);
+        reset(rs);
+        when(mNm.isInLockDownMode()).thenReturn(true);
+        when(r.getSbn()).thenReturn(sbn);
+        mListeners.notifyRemovedLocked(r, 0, rs);
+        mListeners.notifyRemovedLocked(r, 0, rs);
+        verify(r, never()).getSbn();
+    }
+}
diff --git a/services/tests/uiservicestests/src/com/android/server/notification/NotificationManagerServiceTest.java b/services/tests/uiservicestests/src/com/android/server/notification/NotificationManagerServiceTest.java
index d097dbcf61db..bd7c37da0707 100755
--- a/services/tests/uiservicestests/src/com/android/server/notification/NotificationManagerServiceTest.java
+++ b/services/tests/uiservicestests/src/com/android/server/notification/NotificationManagerServiceTest.java
@@ -52,9 +52,12 @@ import static android.os.Build.VERSION_CODES.P;
 import static android.os.UserHandle.USER_SYSTEM;
 import static android.service.notification.Adjustment.KEY_IMPORTANCE;
 import static android.service.notification.Adjustment.KEY_USER_SENTIMENT;
+import static android.service.notification.NotificationListenerService.REASON_CANCEL_ALL;
 import static android.service.notification.NotificationListenerService.Ranking.USER_SENTIMENT_NEGATIVE;
 import static android.service.notification.NotificationListenerService.Ranking.USER_SENTIMENT_NEUTRAL;
 
+import static com.android.internal.widget.LockPatternUtils.StrongAuthTracker.STRONG_AUTH_REQUIRED_AFTER_USER_LOCKDOWN;
+
 import static junit.framework.Assert.assertEquals;
 import static junit.framework.Assert.assertFalse;
 import static junit.framework.Assert.assertNotNull;
@@ -398,8 +401,26 @@ public class NotificationManagerServiceTest extends UiServiceTestCase {
         interface NotificationAssistantAccessGrantedCallback {
             void onGranted(ComponentName assistant, int userId, boolean granted);
         }
+
+        class StrongAuthTrackerFake extends NotificationManagerService.StrongAuthTracker {
+            private int mGetStrongAuthForUserReturnValue = 0;
+            StrongAuthTrackerFake(Context context) {
+                super(context);
+            }
+
+            public void setGetStrongAuthForUserReturnValue(int val) {
+                mGetStrongAuthForUserReturnValue = val;
+            }
+
+            @Override
+            public int getStrongAuthForUser(int userId) {
+                return mGetStrongAuthForUserReturnValue;
+            }
+        }
     }
 
+    TestableNotificationManagerService.StrongAuthTrackerFake mStrongAuthTracker;
+
     private class TestableToastCallback extends ITransientNotification.Stub {
         @Override
         public void show(IBinder windowToken) {
@@ -516,6 +537,9 @@ public class NotificationManagerServiceTest extends UiServiceTestCase {
 
         mService.setAudioManager(mAudioManager);
 
+        mStrongAuthTracker = mService.new StrongAuthTrackerFake(mContext);
+        mService.setStrongAuthTracker(mStrongAuthTracker);
+
         mShortcutHelper = mService.getShortcutHelper();
         mShortcutHelper.setLauncherApps(mLauncherApps);
         mShortcutHelper.setShortcutServiceInternal(mShortcutServiceInternal);
@@ -7129,4 +7153,44 @@ public class NotificationManagerServiceTest extends UiServiceTestCase {
             }
         }
     }
+
+    @Test
+    public void testStrongAuthTracker_isInLockDownMode() {
+        mStrongAuthTracker.setGetStrongAuthForUserReturnValue(
+                STRONG_AUTH_REQUIRED_AFTER_USER_LOCKDOWN);
+        mStrongAuthTracker.onStrongAuthRequiredChanged(mContext.getUserId());
+        assertTrue(mStrongAuthTracker.isInLockDownMode());
+        mStrongAuthTracker.setGetStrongAuthForUserReturnValue(0);
+        mStrongAuthTracker.onStrongAuthRequiredChanged(mContext.getUserId());
+        assertFalse(mStrongAuthTracker.isInLockDownMode());
+    }
+
+    @Test
+    public void testCancelAndPostNotificationsWhenEnterAndExitLockDownMode() {
+        // post 2 notifications from 2 packages
+        NotificationRecord pkgA = new NotificationRecord(mContext,
+                generateSbn("a", 1000, 9, 0), mTestNotificationChannel);
+        mService.addNotification(pkgA);
+        NotificationRecord pkgB = new NotificationRecord(mContext,
+                generateSbn("b", 1001, 9, 0), mTestNotificationChannel);
+        mService.addNotification(pkgB);
+
+        // when entering the lockdown mode, cancel the 2 notifications.
+        mStrongAuthTracker.setGetStrongAuthForUserReturnValue(
+                STRONG_AUTH_REQUIRED_AFTER_USER_LOCKDOWN);
+        mStrongAuthTracker.onStrongAuthRequiredChanged(mContext.getUserId());
+        assertTrue(mStrongAuthTracker.isInLockDownMode());
+
+        // the notifyRemovedLocked function is called twice due to REASON_LOCKDOWN.
+        ArgumentCaptor<Integer> captor = ArgumentCaptor.forClass(Integer.class);
+        verify(mListeners, times(2)).notifyRemovedLocked(any(), captor.capture(), any());
+        assertEquals(REASON_CANCEL_ALL, captor.getValue().intValue());
+
+        // exit lockdown mode.
+        mStrongAuthTracker.setGetStrongAuthForUserReturnValue(0);
+        mStrongAuthTracker.onStrongAuthRequiredChanged(mContext.getUserId());
+
+        // the notifyPostedLocked function is called twice.
+        verify(mListeners, times(2)).notifyPostedLocked(any(), any());
+    }
 }