port-arm/53173: (earmv7hf) "go test net/http" locks up the machine

[bsiegert%NetBSD.org@localhost]

>Number:         53173
>Category:       port-arm
>Synopsis:       (earmv7hf) "go test net/http" locks up the machine
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    port-arm-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Apr 10 18:35:00 +0000 2018
>Originator:     Benny Siegert
>Release:        NetBSD 8.99.14, pkgsrc 2018Q1
>Organization:
The NetBSD Foundation
>Environment:
NetBSD (redacted) 8.99.14 NetBSD 8.99.14 (SUNXI) #0: Sun Mar 18 13:18:39 UTC 2018 mkrepro%mkrepro.NetBSD.org@localhost:/usr/src/sys/arch/evbarm/compile/SUNXI evbarm
go version go1.10 netbsd/arm
>Description:
I am running a continuous NetBSD builder on this OrangePi Plus 2E and noticed lockups of the system during tests. They tend to occur during the net/http test suite.

Symptom: the console stops updating or accepting input. The system gets warm, presumably the CPU is busy spinlocking.
>How-To-Repeat:
1. install lang/go from pkgsrc
2. Run "go test net/http", you may have to repeat a few times.
>Fix: