From 04876d4657687fa8bf8043066ac9327c69e78393 Mon Sep 17 00:00:00 2001
From: Alex Buynytskyy <alexbuy@google.com>
Date: Wed, 1 Mar 2023 19:07:06 -0800
Subject: [PATCH] Make sure there is always a user.

Bug: 269072872
Test: atest com.android.server.pm.UserManagerTest
Change-Id: Ic6c523ede4538cc8152214812f840c146659a7cf
---
 .../java/com/android/server/pm/UserManagerService.java     | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/services/core/java/com/android/server/pm/UserManagerService.java b/services/core/java/com/android/server/pm/UserManagerService.java
index b21243a7baecc..2f98d3485d906 100644
--- a/services/core/java/com/android/server/pm/UserManagerService.java
+++ b/services/core/java/com/android/server/pm/UserManagerService.java
@@ -3635,6 +3635,13 @@ public class UserManagerService extends IUserManager.Stub {
         } finally {
             IoUtils.closeQuietly(fis);
         }
+
+        synchronized (mUsersLock) {
+            if (mUsers.size() == 0) {
+                Slog.e(LOG_TAG, "mUsers is empty, fallback to single user");
+                fallbackToSingleUserLP();
+            }
+        }
     }
 
     /**