port-arm/54396: GuruPlug spontaneous reboots during test runs

[martin%NetBSD.org@localhost]

>Number:         54396
>Category:       port-arm
>Synopsis:       GuruPlug spontaneous reboots during test runs
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    port-arm-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Jul 22 15:30:01 +0000 2019
>Originator:     Martin Husemann
>Release:        NetBSD 8.99.51
>Organization:
The NetBSD Foundation, Inc.
>Environment:

System: NetBSD unpluged.duskware.de 8.99.51 NetBSD 8.99.51 (UNPLUGED) #255: Mon Jul 22 11:44:08 CEST 2019 martin%seven-days-to-the-wolves.aprisoft.de@localhost:/work/src/sys/arch/evbarm/compile/UNPLUGED evbarm
Architecture: earm
Machine: evbarm
>Description:

My evbarm test machine does not survive an atf test run with todays
kernel. It is reproducable, but not to the exact test. First time
I noticed it got to this lib/libc/db test:

    btree_known_byte_order: [0.876389s] Passed.
    btree_recursive_traversal: [27.513718s] Passed.
    btree_tricky_page_split: [2.853658s] Passed.
    btree_weird_page_split: 

I retried twice and last time it made it to this:

bin/sh/t_varval (26/793): 5 test cases
    aaa: [0.915697s] Passed.
    assignment: [3.078257s] Passed.
    cmdline: [3.081874s] Passed.
    read: [3.685654s] Passed.
    redirect: 

Console output:

[ 2612.9677691] Kernel RNG "kernel" long run test FAILURE: Run of 26 0s found
[ 2612.9677691] cprng kernel: failed statistical RNG test
[ 2621.6975259] Kernel RNG "kernel" poker test failure: parameter X = 1.46560
[ 2621.6975259] cprng kernel: failed statistical RNG test


U-Boot 2013.10 (Oct 21 2013 - 20:54:41)
Marvell-GuruPlug

SoC:   Kirkwood 88F6281_A1
DRAM:  512 MiB
WARNING: Caches not enabled
NAND:  512 MiB
In:    serial
Out:   serial
...

>How-To-Repeat:
Run atf tests.

>Fix:
n/a