VirtioFS Mount Error: "Numerical result out of range" on M4 Mac (Apple Virtualization)

Environment

UTM Version: 4.7.5 (118)

macOS Version: 26.4.1 (25E253)

Mac Chip: M4 (MacBook Air)

Guest OS: Debian GNU/Linux 13 (trixie)

Guest Kernel: Linux 6.12.74+deb13+1-arm64

Virtualization Backend: Apple Virtualization (not QEMU)

Description

When attempting to mount a shared directory via VirtioFS on a clean install of Debian 13 on M4 hardware, the mount succeeds at the command line but becomes inaccessible in the guest. Any attempt to access the mount point results in a "Numerical result out of range" error (ERANGE).

Steps to Reproduce

Create a new VM using Apple Virtualization.

Install Debian 13 (ARM64) with LVM (no encryption).

Configure a shared directory in UTM with the tag share.

Inside the guest, install virtiofsd and attempt to mount:
sudo mount -t virtiofs share /home/user/Public

Attempt to list files or open the directory in GNOME Files (Nautilus).

Expected Behavior

The directory should be readable and show files.

Actual Behavior

Terminal Error: ls: cannot access '/home/user/Public': Numerical result out of range

GUI Error: Error when getting information for file "/home/user/Public": Numerical result out of range

Diagnostic Logs

dmesg output shows that the driver is active but rejecting specific mount options like DAX, and potentially struggling with 64-bit inode mapping from the M4 host:

Plaintext
[ 1742.659654] virtio-fs: dax can't be enabled as filesystem device does not support it.
[ 2037.853780] virtio-fs: dax can't be enabled as filesystem device does not support it.
Additional Context

I have verified that virtiofsd is installed in the guest at /usr/libexec/virtiofsd.

Changing the tag names and re-adding the share does not resolve the "Out of range" error.

The issue appears related to Issue #7677, but specifically manifests as an ERANGE error on the new M4 storage controller/chipset.

Using a RAW/ASIF disk image via the USB interface works fine, suggesting the issue is isolated to the virtiofs communication layer between macOS and the 6.12 kernel.