Disabling FGS start from System Alert Window (ce5f8eb5) · Commits · e / os / android_frameworks_base

services/core/java/com/android/server/am/ActiveServices.java

+33 −3

Original line number	Diff line number	Diff line
		@@ -372,6 +372,15 @@ public final class ActiveServices {
		@Overridable
		public static final long FGS_BOOT_COMPLETED_RESTRICTIONS = 296558535L;

		/**
		* Disables foreground service background starts in System Alert Window for all types
		* unless it already has a System Overlay Window.
		*/
		@ChangeId
		@EnabledSince(targetSdkVersion = VERSION_CODES.VANILLA_ICE_CREAM)
		@Overridable
		public static final long FGS_SAW_RESTRICTIONS = 319471980L;

		final ActivityManagerService mAm;

		// Maximum number of services that we allow to start in the background
		@@ -8525,12 +8534,33 @@ public final class ActiveServices {
		}
		}

		// The flag being enabled isn't enough to deny background start: we need to also check
		// if there is a system alert UI present.
		if (ret == REASON_DENIED) {
		// Flag check: are we disabling SAW FGS background starts?
		final boolean shouldDisableSaw = Flags.fgsDisableSaw()
		&& CompatChanges.isChangeEnabled(FGS_BOOT_COMPLETED_RESTRICTIONS, callingUid);
		if (shouldDisableSaw) {
		final ProcessRecord processRecord = mAm
		.getProcessRecordLocked(targetService.processName,
		targetService.appInfo.uid);
		if (processRecord != null) {
		if (processRecord.mState.hasOverlayUi()) {
		if (mAm.mAtmInternal.hasSystemAlertWindowPermission(callingUid, callingPid,
		callingPackage)) {
		ret = REASON_SYSTEM_ALERT_WINDOW_PERMISSION;
		}
		}
		} else {
		Slog.e(TAG, "Could not find process record for SAW check");
		}
		} else {
		if (mAm.mAtmInternal.hasSystemAlertWindowPermission(callingUid, callingPid,
		callingPackage)) {
		ret = REASON_SYSTEM_ALERT_WINDOW_PERMISSION;
		}
		}
		}

		// Check for CDM apps with either REQUEST_COMPANION_RUN_IN_BACKGROUND or
		// REQUEST_COMPANION_START_FOREGROUND_SERVICES_FROM_BACKGROUND.

services/core/java/com/android/server/am/flags.aconfig

+7 −0

Original line number	Diff line number	Diff line
		@@ -22,6 +22,13 @@ flag {
		bug: "296558535"
		}

		flag {
		name: "fgs_disable_saw"
		namespace: "backstage_power"
		description: "Disable System Alert Window FGS start"
		bug: "296558535"
		}

		flag {
		name: "bfgs_managed_network_access"
		namespace: "backstage_power"