Vbox causing host crash/reboot on 12-current

[AN]

Update:

I found the revision:
https://svnweb.freebsd.org/base?view=revision&revision=336876

Use SMAP on amd64.

Could this possibly cause VBox to crash and reboot the system?  Is
there a sysctl to disable?

Thanks

On Tue, Aug 7, 2018 at 10:46 AM, AN <a.n.us at ieee.org> wrote:
> I recently started having severe instability on a workstation with
> VirtualBox.  I'm not sure if it was caused by the recent large ports
> update, or a recent commit that affected SMAP.  I can't seem to find
> that revision, would someone please post it and also the workaround to
> disable it, I would like to try it after work and see if disabling it
> allows VBox to work.  Is anyone else seeing this effect with Vbox?
>
> What I'm seeing is that as soon as a VM is started it reboots the
> host, totally reproducible every time.  I tried to rebuild VBox and
> kmod, and also some qt5 ports but still not working.  Any help is
> appreciated, thanks for reading.
>
> Regards