Panic "vm_fault_lookup: fault on nofault entry" amd64 r362008 -> r362045

[Konstantin Belousov]

On Thu, Jun 11, 2020 at 08:44:56AM -0700, David Wolfskill wrote:
> On Thu, Jun 11, 2020 at 04:46:58PM +0300, Konstantin Belousov wrote:
> > ...
> > > I have not used -DNO_CLEAN in years -- I do use META_MODE, though.  I
> > > can certainly clean out /usr/obj/* & start a new build (just before I
> > > head out for a bike ride).
> > 
> > That, and also rebuild all third-party modules you use.  Definitely nvidia.
> 
> I always do, via "PORTS_MODULES=x11/nvidia-driver" in /etc/src.conf.
> 
> Anyway: After "rm -fr /usr/obj/*", I started a fresh build, went on the
> bike ride, came back, and the build/install had completed without issue.
> 
> I rebooted, and ... the resulting panic looked identical to me; I have
> copied the new screenshots to the same places.

Can you boot into single-user, without loading linux/cuse/nvidia modules.
Even, do not load any module at all, and keeping root ro.

If boot succeed, then try to load modules one by one and see which causes
panic.