Unable to attach serial device to VM since update to TrueNAS-SCALE-22.02.2.1

[someusr]

Hey there!

This is my first post here so there will be room for improvement. Let me know when I missed information that could be helpful to understand and analyse the issue I have.

Hardware info

• MB: Supermicro Super Server
• CPU: i3-8100T CPU @ 3.10GHz
• RAM: 16GB 2400MHz ECC Micron
• HD:
  
  • 2x WD Red 8TB HDD in mirror mode
  • 1 256GB Samsung SSD as boot and system drive

Description of issue​

After updating to TrueNAS-SCALE-22.02.2.1 I am now unable to attach my serial device to my qemu virtual machine via "virsh attach-device".

Steps to reproduce​

1. Have an xml file which defines a device that should be attached to vm (see attachment "add_conbee2_serial.xml")
2. Start qemu virtual machine
3. Execute "virsh attach-device $vm_name --file add_conbee2_serial.xml --config --persistent"
4. See it fail with
   
   Code:

   error: Failed to attach device from /root/add_conbee2_serial.xml
   error: internal error: cannot update AppArmor profile 'libvirt-03bc6e95-483e-4422-94bf-4d0299ec44a9'
   

What should have happened​

After executing step 3 there should be a success hint and the device should be visible within the qemu virtual maschine.

What else to know​

• I did not temper with any libvirt/qemu configuration
• It was last seen working with TrueNAS-SCALE-22.02.1 and then I updated to TrueNAS-SCALE-22.02.2.1
• systemctl status libvirtd.service prints out the following
  
  Code:

  internal error: Child process (LIBVIRT_LOG_OUTPUTS=3:stderr /usr/lib/libvirt/virt-aa-helper -r -u libvirt-03bc6e95-483e-4422-94bf-4d0299ec44a9 -F SERIAL_PORT) unexpected exit status 1: 2022-08-12 10:31:56.961+0000: 1678469: info : libvirt version: 7.0.0, package: 3 (Andrea Bolognani <eof@kiyuko.org> Fri, 26 Feb 2021 16:46:34 +0100)
  2022-08-12 10:31:56.961+0000: 1678469: info : hostname: truenas
  2022-08-12 10:31:56.961+0000: 1678469: error : virStorageFileBackendFileRead:125 : Failed to open file '/dev/zvol/data/zvols/homeassistant': Permission denied
  virt-aa-helper: warning: SERIAL_PORT
  virt-aa-helper: warning: skipped non-absolute path
  virt-aa-helper: warning: SERIAL_PORT
  virt-aa-helper: warning: skipped non-absolute path
  virt-aa-helper: error: apparmor_parser exited with error
  internal error: cannot update AppArmor profile 'libvirt-03bc6e95-483e-4422-94bf-4d0299ec44a9'
  

• file permission for the zvol are these
  
  Code:

  root@truenas:/dev/zvol/data/zvols# pwd
  /dev/zvol/data/zvols
  root@truenas:/dev/zvol/data/zvols# ls -la
  total 0
  drwxr-xr-x 2 root root 60 Aug 11 22:24 .
  drwxr-xr-x 3 root root 60 Aug 11 22:24 ..
  lrwxrwxrwx 1 root root 12 Aug 11 22:24 homeassistant -> ../../../zd0
  

Please don't bother by trying to tell me to file a bug report. I did that and they pointed me to the forum here because they "don't troubleshoot custom configuration options done via the cli or troubleshoot scripts".

Maybe someone encountered a similar issue and provide some hints or can point me to a direction to solve the issue myself.

Thanks y'all.

 

[someusr]

Edit:
Here my xml device file:

Code:

<serial type="dev">
  <source path="/dev/ttyACM0"/>
  <target type="usb-serial" port="1">
    <model name="usb-serial"/>
  </target>
  <alias name="serial1"/>
  <address type="usb" bus="0" port="4"/>  
</serial>

 

[morganL]

Can you try SCALE 22.02.3?