diff --git a/services/core/java/com/android/server/pm/PackageManagerService.java b/services/core/java/com/android/server/pm/PackageManagerService.java
index 7d68f8dd0d615..ba11e9c26dfed 100644
--- a/services/core/java/com/android/server/pm/PackageManagerService.java
+++ b/services/core/java/com/android/server/pm/PackageManagerService.java
@@ -28825,8 +28825,12 @@ public class PackageManagerService extends IPackageManager.Stub
     @Override
     public void setSplashScreenTheme(@NonNull String packageName, @Nullable String themeId,
             int userId) {
-        int callingUid = Binder.getCallingUid();
-        PackageSetting packageSetting = getPackageSettingForUser(packageName, callingUid, userId);
+        final int callingUid = Binder.getCallingUid();
+        enforceCrossUserPermission(callingUid, userId, false /* requireFullPermission */,
+                false /* checkShell */, "setSplashScreenTheme");
+        enforceOwnerRights(packageName, callingUid);
+        final PackageSetting packageSetting = getPackageSettingForUser(packageName, callingUid,
+                userId);
         if (packageSetting != null) {
             packageSetting.setSplashScreenTheme(userId, themeId);
         }
diff --git a/services/tests/servicestests/Android.bp b/services/tests/servicestests/Android.bp
index 339a5f916b4b8..7020744d661cd 100644
--- a/services/tests/servicestests/Android.bp
+++ b/services/tests/servicestests/Android.bp
@@ -110,6 +110,7 @@ android_test {
 
     data: [
         ":JobTestApp",
+        ":StubTestApp",
     ],
 
     java_resources: [
diff --git a/services/tests/servicestests/AndroidTest.xml b/services/tests/servicestests/AndroidTest.xml
index 5a0f1ee963a2e..4c638d669019f 100644
--- a/services/tests/servicestests/AndroidTest.xml
+++ b/services/tests/servicestests/AndroidTest.xml
@@ -28,6 +28,17 @@
         <option name="test-file-name" value="SimpleServiceTestApp3.apk" />
     </target_preparer>
 
+    <!-- Create place to store apks -->
+    <target_preparer class="com.android.tradefed.targetprep.RunCommandTargetPreparer">
+        <option name="run-command" value="mkdir -p /data/local/tmp/servicestests" />
+        <option name="teardown-command" value="rm -rf /data/local/tmp/servicestests"/>
+    </target_preparer>
+
+    <!-- Load additional APKs onto device -->
+    <target_preparer class="com.android.compatibility.common.tradefed.targetprep.FilePusher">
+        <option name="push" value="StubTestApp.apk->/data/local/tmp/servicestests/StubTestApp.apk"/>
+    </target_preparer>
+
     <option name="test-tag" value="FrameworksServicesTests" />
     <test class="com.android.tradefed.testtype.AndroidJUnitTest" >
         <option name="package" value="com.android.frameworks.servicestests" />
diff --git a/services/tests/servicestests/src/com/android/server/pm/PackageManagerServiceTest.java b/services/tests/servicestests/src/com/android/server/pm/PackageManagerServiceTest.java
index 976a588273a7e..18992ecfd3a46 100644
--- a/services/tests/servicestests/src/com/android/server/pm/PackageManagerServiceTest.java
+++ b/services/tests/servicestests/src/com/android/server/pm/PackageManagerServiceTest.java
@@ -16,6 +16,8 @@
 
 package com.android.server.pm;
 
+import static com.android.compatibility.common.util.ShellUtils.runShellCommand;
+
 import static com.google.common.truth.Truth.assertWithMessage;
 
 import static org.junit.Assert.fail;
@@ -27,9 +29,12 @@ import static java.lang.reflect.Modifier.isPublic;
 import static java.lang.reflect.Modifier.isStatic;
 
 import android.annotation.Nullable;
+import android.app.AppGlobals;
 import android.content.IIntentReceiver;
+import android.content.pm.IPackageManager;
 import android.content.pm.PackageManagerInternal;
 import android.os.Bundle;
+import android.os.UserHandle;
 import android.util.SparseArray;
 
 import androidx.test.runner.AndroidJUnit4;
@@ -62,8 +67,18 @@ import java.util.regex.Pattern;
 // bit FrameworksServicesTests:com.android.server.pm.PackageManagerServiceTest
 @RunWith(AndroidJUnit4.class)
 public class PackageManagerServiceTest {
+
+    private static final String PACKAGE_NAME = "com.android.frameworks.servicestests";
+
+    private static final String TEST_DATA_PATH = "/data/local/tmp/servicestests/";
+    private static final String TEST_APP_APK = "StubTestApp.apk";
+    private static final String TEST_PKG_NAME = "com.android.servicestests.apps.stubapp";
+
+    private IPackageManager mIPackageManager;
+
     @Before
     public void setUp() throws Exception {
+        mIPackageManager = AppGlobals.getPackageManager();
     }
 
     @After
@@ -599,4 +614,26 @@ public class PackageManagerServiceTest {
         Collections.sort(knownPackageIds);
         return knownPackageIds;
     }
+
+    @Test
+    public void testSetSplashScreenTheme_samePackage_succeeds() throws Exception {
+        mIPackageManager.setSplashScreenTheme(PACKAGE_NAME, null /* themeName */,
+                UserHandle.myUserId());
+        // Invoking setSplashScreenTheme on the same package shouldn't get any exception.
+    }
+
+    @Test
+    public void testSetSplashScreenTheme_differentPackage_fails() throws Exception {
+        final File testApk = new File(TEST_DATA_PATH, TEST_APP_APK);
+        try {
+            runShellCommand("pm install " + testApk);
+            mIPackageManager.setSplashScreenTheme(TEST_PKG_NAME, null /* themeName */,
+                    UserHandle.myUserId());
+            fail("setSplashScreenTheme did not throw SecurityException as expected");
+        } catch (SecurityException e) {
+            // expected
+        } finally {
+            runShellCommand("pm uninstall " + TEST_PKG_NAME);
+        }
+    }
 }
diff --git a/services/tests/servicestests/test-apps/StubApp/Android.bp b/services/tests/servicestests/test-apps/StubApp/Android.bp
new file mode 100644
index 0000000000000..99deb3f5bbf0a
--- /dev/null
+++ b/services/tests/servicestests/test-apps/StubApp/Android.bp
@@ -0,0 +1,37 @@
+// Copyright (C) 2021 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 {
+    // See: http://go/android-license-faq
+    // A large-scale-change added 'default_applicable_licenses' to import
+    // all of the 'license_kinds' from "frameworks_base_license"
+    // to get the below license kinds:
+    //   SPDX-license-identifier-Apache-2.0
+    default_applicable_licenses: ["frameworks_base_license"],
+}
+
+android_test_helper_app {
+    name: "StubTestApp",
+
+    sdk_version: "current",
+
+    srcs: ["**/*.java"],
+
+    dex_preopt: {
+        enabled: false,
+    },
+    optimize: {
+        enabled: false,
+    },
+}
diff --git a/services/tests/servicestests/test-apps/StubApp/AndroidManifest.xml b/services/tests/servicestests/test-apps/StubApp/AndroidManifest.xml
new file mode 100644
index 0000000000000..90172e77f9585
--- /dev/null
+++ b/services/tests/servicestests/test-apps/StubApp/AndroidManifest.xml
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2021 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.
+-->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+        package="com.android.servicestests.apps.stubapp">
+
+    <application android:label="StubTestApp">
+        <activity android:name=".TestActivity"
+                  android:exported="true" />
+    </application>
+
+</manifest>
\ No newline at end of file
diff --git a/services/tests/servicestests/test-apps/StubApp/src/com/android/servicestests/apps/stubapp/TestActivity.java b/services/tests/servicestests/test-apps/StubApp/src/com/android/servicestests/apps/stubapp/TestActivity.java
new file mode 100644
index 0000000000000..0d94676aeb52d
--- /dev/null
+++ b/services/tests/servicestests/test-apps/StubApp/src/com/android/servicestests/apps/stubapp/TestActivity.java
@@ -0,0 +1,22 @@
+/*
+ * Copyright (C) 2021 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.servicestests.apps.stubapp;
+
+import android.app.Activity;
+
+public class TestActivity extends Activity {
+}