kernel panic: make_dev_alias_v bad si_name (error=22) si_name=vtcon/ org.qemu.guest_agent.0)

[Wolfram Schneider]

Hi,

I have a virtual machine running with FreeBSD 11-stable at a cloud
provider. It runs fine. I tried to upgrade to FreeBSD 12-current and
the kernel panics at boot time with:

make_dev_alias_v bad si_name (error=22) si_name=vtcon/ org.qemu.guest_agent.0)

and hangs. Lucky, I still can boot from kernel.old and bring the machine up.

any idea whats wrong here?

-Wolfram

-- 
Wolfram Schneider <wosch at FreeBSD.org> https://wolfram.schneider.org