Merge "Restrict device wakeup via PowerManager.ACQUIRE_CAUSES_WAKEUP." into tm-dev am: 244a90bfe1 (f808af11) · Commits · e / os / android_frameworks_base

services/core/java/com/android/server/power/PowerManagerService.java

+63 −6

Original line number	Diff line number	Diff line
		@@ -40,12 +40,14 @@ import android.annotation.Nullable;
		import android.annotation.RequiresPermission;
		import android.annotation.UserIdInt;
		import android.app.ActivityManager;
		import android.app.AppOpsManager;
		import android.app.SynchronousUserSwitchObserver;
		import android.content.BroadcastReceiver;
		import android.content.ContentResolver;
		import android.content.Context;
		import android.content.Intent;
		import android.content.IntentFilter;
		import android.content.pm.ApplicationInfo;
		import android.content.pm.PackageManager;
		import android.content.res.Resources;
		import android.database.ContentObserver;
		@@ -1454,6 +1456,15 @@ public final class PowerManagerService extends SystemService
		private void acquireWakeLockInternal(IBinder lock, int displayId, int flags, String tag,
		String packageName, WorkSource ws, String historyTag, int uid, int pid,
		@Nullable IWakeLockCallback callback) {

		boolean isCallerPrivileged = false;
		try {
		ApplicationInfo appInfo = mContext.getPackageManager().getApplicationInfo(packageName,
		PackageManager.ApplicationInfoFlags.of(0));
		isCallerPrivileged = appInfo.uid == uid && appInfo.isPrivilegedApp();
		} catch (PackageManager.NameNotFoundException e) {
		// assume app is not privileged
		}
		synchronized (mLock) {
		if (displayId != Display.INVALID_DISPLAY) {
		final DisplayInfo displayInfo =
		@@ -1500,7 +1511,7 @@ public final class PowerManagerService extends SystemService
		notifyAcquire = true;
		}

		applyWakeLockFlagsOnAcquireLocked(wakeLock, uid);
		applyWakeLockFlagsOnAcquireLocked(wakeLock, isCallerPrivileged);
		mDirty \|= DIRTY_WAKE_LOCKS;
		updatePowerStateLocked();
		if (notifyAcquire) {
		@@ -1539,8 +1550,34 @@ public final class PowerManagerService extends SystemService
		return null;
		}

		private boolean isAcquireCausesWakeupFlagAllowed(String opPackageName, int opUid,
		boolean isCallerPrivileged) {
		if (opPackageName == null) {
		return false;
		}
		if (isCallerPrivileged) {
		if (DEBUG_SPEW) {
		Slog.d(TAG, "Allowing device wake-up for privileged app, call attributed to "
		+ opPackageName);
		}
		return true;
		}
		if (mContext.getSystemService(AppOpsManager.class).checkOpNoThrow(
		AppOpsManager.OP_TURN_SCREEN_ON, opUid, opPackageName)
		== AppOpsManager.MODE_ALLOWED) {
		if (DEBUG_SPEW) {
		Slog.d(TAG, "Allowing device wake-up for app with special access " + opPackageName);
		}
		return true;
		}
		if (DEBUG_SPEW) {
		Slog.d(TAG, "Not allowing device wake-up for " + opPackageName);
		}
		return false;
		}

		@GuardedBy("mLock")
		private void applyWakeLockFlagsOnAcquireLocked(WakeLock wakeLock, int uid) {
		private void applyWakeLockFlagsOnAcquireLocked(WakeLock wakeLock, boolean isCallerPrivileged) {
		if ((wakeLock.mFlags & PowerManager.ACQUIRE_CAUSES_WAKEUP) != 0
		&& isScreenLock(wakeLock)) {
		String opPackageName;
		@@ -1560,10 +1597,30 @@ public final class PowerManagerService extends SystemService
		opPackageName = wakeLock.mPackageName;
		opUid = wakeLock.mOwnerUid;
		}
		Integer powerGroupId = wakeLock.getPowerGroupId();
		// powerGroupId is null if the wakelock associated display is no longer available
		if (powerGroupId != null && isAcquireCausesWakeupFlagAllowed(opPackageName, opUid,
		isCallerPrivileged)) {
		if (powerGroupId == Display.INVALID_DISPLAY_GROUP) {
		// wake up all display groups
		if (DEBUG_SPEW) {
		Slog.d(TAG, "Waking up all power groups");
		}
		for (int idx = 0; idx < mPowerGroups.size(); idx++) {
		wakePowerGroupLocked(mPowerGroups.valueAt(idx), mClock.uptimeMillis(),
		PowerManager.WAKE_REASON_APPLICATION, wakeLock.mTag, opUid, opPackageName,
		opUid);
		PowerManager.WAKE_REASON_APPLICATION, wakeLock.mTag, opUid,
		opPackageName, opUid);
		}
		return;
		}
		if (mPowerGroups.contains(powerGroupId)) {
		if (DEBUG_SPEW) {
		Slog.d(TAG, "Waking up power group " + powerGroupId);
		}
		wakePowerGroupLocked(mPowerGroups.get(powerGroupId), mClock.uptimeMillis(),
		PowerManager.WAKE_REASON_APPLICATION, wakeLock.mTag, opUid,
		opPackageName, opUid);
		}
		}
		}
		}