`Unable to open ashmem device` with `androidboot.use_memfd` enabled

[SakuraKoi]

Describe the bug ashmem : Unable to open ashmem device /dev/ashmem286560ba-2737-4ed9-a3ef-8fda0eabe024 (error = No such file or directory) and /dev/ashmem(error = No such file or directory) with androidboot.use_memfd enabled

as the error message is from __ashmem_open_locked(), and the method is called from __ashmem_open(), and __ashmem_open() is called by ashmem_create_region() I guess there's something wrong with has_memfd_support()

I'm not familiar with the internal implementation of Android, any ideas or clues for me to debug it?

Platform: Fedora 39 with 6.5.6-300.fc39.x86_64 kernel

docker compose file

name: redroid
services:
    redroid:
        stdin_open: true
        tty: true
        privileged: true
        restart: no
        volumes:
            - './data:/data'
        ports:
            - 5555:5555
        command:
            - 'androidboot.redroid_gpu_mode=guest'
            - 'androidboot.use_memfd=1'
        container_name: redroid
        image: redroid/redroid:12.0.0.modified.magisk

make sure the required kernel modules present

• grep binder /proc/filesystems

  nodev binder

• grep ashmem /proc/misc

  *nothing

collect debug logs

01-09 15:14:24.110    80    80 W SQLiteCompatibilityWalFlags: Cannot read global setting sqlite_compatibility_wal_flags - Application state not available
01-09 15:14:24.125    80   112 E ashmem  : Unable to open ashmem device /dev/ashmem286560ba-2737-4ed9-a3ef-8fda0eabe024 (error = No such file or directory) and /dev/ashmem(error = No such file or directory)
01-09 15:14:24.125    80   112 E LSPosedService: preload dex
01-09 15:14:24.125    80   112 E LSPosedService: android.system.ErrnoException: SharedMemory_create failed: ENOENT (No such file or directory)
01-09 15:14:24.125    80   112 E LSPosedService:        at android.os.SharedMemory.nCreate(Native Method)
01-09 15:14:24.125    80   112 E LSPosedService:        at android.os.SharedMemory.create(SharedMemory.java:87)
01-09 15:14:24.125    80   112 E LSPosedService:        at z0.j(Unknown Source:5)
01-09 15:14:24.125    80   112 E LSPosedService:        at z0.g(Unknown Source:14)
01-09 15:14:24.125    80   112 E LSPosedService:        at O0.run(Unknown Source:226)
01-09 15:14:24.125    80   112 E LSPosedService:        at android.os.Handler.handleCallback(Handler.java:938)
01-09 15:14:24.125    80   112 E LSPosedService:        at android.os.Handler.dispatchMessage(Handler.java:99)
01-09 15:14:24.125    80   112 E LSPosedService:        at android.os.Looper.loopOnce(Looper.java:201)
01-09 15:14:24.125    80   112 E LSPosedService:        at android.os.Looper.loop(Looper.java:288)
01-09 15:14:24.125    80   112 E LSPosedService:        at android.os.HandlerThread.run(HandlerThread.java:67)