Crashes in Assigned Access with `windows.aboveLockScreen` extension

[matthewaptaylor]

Problem Description

A React Native Windows app can run in Assigned Access mode. However, if the windows.aboveLockScreen extension is added to Package.appxmanifest, the app crashes when signing into the assigned access user.

We need this extension to use the LockApplicationHost API.

There is a section here on viewing logs for the application in Assigned Access.

This may be due to the fact this extension causes the app to run in a secondary view, but I'm unsure.

Looking through event viewer logs, it looks like the application is being terminated to prevent a buffer overflow (exception 0xc0000409 means STATUS_STACK_BUFFER_OVERRUN).

Faulting application name: <AppName>.exe, version: 0.0.0.0, time stamp: 0x6886e168
Faulting module name: ucrtbase.dll, version: 10.0.26100.4652, time stamp: 0xbaffbd59
Exception code: 0xc0000409
Fault offset: 0x00000000000a4ace
Faulting process id: 0x5574
Faulting application start time: 0x1DBFF70374D7BD1
Faulting application path: C:\Program Files\WindowsApps\941ca622-9242-4aba-947d-9748e09ef62f_1.0.2.0_x64__vbrzzkxpq9pg8\<AppName>.exe
Faulting module path: C:\WINDOWS\System32\ucrtbase.dll
Report Id: 75d45e2d-e4ba-4aab-a7db-3ec301ea25c8
Faulting package full name: 941ca622-9242-4aba-947d-9748e09ef62f_1.0.2.0_x64__vbrzzkxpq9pg8
Faulting package-relative application ID: App

Steps To Reproduce

1. Create a blank app.
2. Add the following under <Application> inside Package.appxmanifest:

<Extensions>
    <uap:Extension Category="windows.lockScreenCall" />
    <uap:Extension Category="windows.aboveLockScreen" />
</Extensions>

3. Set up assigned access for the app as described here: https://learn.microsoft.com/en-us/windows/configuration/assigned-access/configure-single-app-kiosk?tabs=settings
4. Sign into the new user, and watch it fail to start

Expected Results

The app should run in Assigned Access mode when built with the windows.aboveLockScreen extension, like it does when it is not.

CLI version

20.0.2

Environment

System:
  OS: Windows 11 10.0.26100
  CPU: (12) x64 12th Gen Intel(R) Core(TM) i5-1235U
  Memory: 36.66 GB / 47.78 GB
Binaries:
  Node:
    version: 22.11.0
    path: C:\nvm4w\nodejs\node.EXE
  Yarn: Not Found
  npm:
    version: 10.9.0
    path: C:\nvm4w\nodejs\npm.CMD
  Watchman: Not Found
SDKs:
  Android SDK: Not Found
  Windows SDK:
    AllowDevelopmentWithoutDevLicense: Enabled
    AllowAllTrustedApps: Enabled
    Versions:
      - 10.0.19041.0
      - 10.0.22621.0
      - 10.0.26100.0
IDEs:
  Android Studio: Not Found
  Visual Studio:
    - 17.14.36310.24 (Visual Studio Community 2022)
Languages:
  Java: Not Found
  Ruby: Not Found
npmPackages:
  "@react-native-community/cli": Not Found
  react: Not Found
  react-native: Not Found
  react-native-windows: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: true
  newArchEnabled: true
iOS:
  hermesEnabled: Not found
  newArchEnabled: Not found

Community Modules

No response

Target React Native Architecture

Old Architecture (UWP) Only

Target Platform Version

= 10.0.26100

Visual Studio Version

Visual Studio 2022

Build Configuration

Release

Snack, code example, screenshot, or link to a repository

No response