kern/54901: evbarm-earmv7hf panics running ATF tests

[gson%gson.org@localhost (Andreas Gustafsson)]

>Number:         54901
>Category:       kern
>Synopsis:       evbarm-earmv7hf panics running ATF tests
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Jan 27 11:00:00 +0000 2020
>Originator:     Andreas Gustafsson
>Release:        NetBSD-current
>Organization:

>Environment:
System: NetBSD
Architecture: arm
Machine: evbarm
>Description:

On the TNF evbarm-earmv7hf testbed, the system panics while running
the ATF tests, with a panic message like this one:

  panic: kernel diagnostic assertion "(flags & UVM_KMF_TYPEMASK) == UVM_KMF_WIRED || (flags & UVM_KMF_TYPEMASK) == UVM_KMF_PAGEABLE || (flags & UVM_KMF_TYPEMASK) == UVM_KMF_VAONLY" failed: file "/tmp/bracket/build/2020.01.24.20.20.35-evbarm-earmv7hf/src/sys/uvm/uvm_km.c", line 748

This is from:

  http://releng.netbsd.org/b5reports/evbarm-earmv7hf/2020/2020.01.24.20.20.35/test.log

The problem started some time between Jan 14 and Jan 18.

>How-To-Repeat:

>Fix: