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Commit a0727e9f authored by Tianjie's avatar Tianjie
Browse files

Acquire the wake lock to ensure RoR isn't delayed 

The server based RoR is time critical, and the secret has a life time
of 10 minutes by default. In one bug, we find the task scheduled by
RebootEscrowManager doesn't run until 13 minutes later. As a
precaution, hold the wake lock in RebootEscrowManager to make sure the
resume on reboot completes.

Bug: 191784420
Test: trigger a RoR
Change-Id: Ife17e279d28b73d22213188a795d0edab99d0818
(cherry picked from commit caefed18)
parent 04e32fa3

services/core/java/com/android/server/locksettings/RebootEscrowManager.java

+22 −0
Original line number Diff line number Diff line
@@ -37,6 +37,7 @@ import android.net.ConnectivityManager; 
import android.net.Network;

import android.net.NetworkCapabilities;

import android.os.Handler;

import android.os.PowerManager;

import android.os.SystemClock;

import android.os.SystemProperties;

import android.os.UserManager;
@@ -119,6 +120,8 @@ class RebootEscrowManager { 
     */

    private static final int DEFAULT_LOAD_ESCROW_DATA_RETRY_COUNT = 3;

    private static final int DEFAULT_LOAD_ESCROW_DATA_RETRY_INTERVAL_SECONDS = 30;

    // 3 minutes. It's enough for the default 3 retries with 30 seconds interval

    private static final int DEFAULT_WAKE_LOCK_TIMEOUT_MILLIS = 180_000;



    @IntDef(prefix = {"ERROR_"}, value = {

            ERROR_NONE,
@@ -187,6 +190,9 @@ class RebootEscrowManager { 


    private final RebootEscrowKeyStoreManager mKeyStoreManager;



    PowerManager.WakeLock mWakeLock;





    interface Callbacks {

        boolean isUserSecure(int userId);
@@ -279,6 +285,11 @@ class RebootEscrowManager { 
            return mRebootEscrowProvider;

        }



        PowerManager.WakeLock getWakeLock() {

            final PowerManager pm = mContext.getSystemService(PowerManager.class);

            return pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "RebootEscrowManager");

        }



        public RebootEscrowProviderInterface getRebootEscrowProvider() {

            return mRebootEscrowProvider;

        }
@@ -365,6 +376,13 @@ class RebootEscrowManager { 
            return;

        }



        // Acquire the wake lock to make sure our scheduled task will run.

        mWakeLock = mInjector.getWakeLock();

        if (mWakeLock != null) {

            mWakeLock.setReferenceCounted(false);

            mWakeLock.acquire(DEFAULT_WAKE_LOCK_TIMEOUT_MILLIS);

        }



        mInjector.post(retryHandler, () -> loadRebootEscrowDataWithRetry(

                retryHandler, 0, users, rebootEscrowUsers));

    }
@@ -519,6 +537,10 @@ class RebootEscrowManager { 
        // Clear the saved reboot escrow provider

        mInjector.clearRebootEscrowProvider();

        clearMetricsStorage();



        if (mWakeLock != null) {

            mWakeLock.release();

        }

    }



    private RebootEscrowKey getAndClearRebootEscrowKey(SecretKey kk) throws IOException {