kern/53261: kernel crash during test run

[martin%NetBSD.org@localhost]

>Number:         53261
>Category:       kern
>Synopsis:       kernel crash during test run
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri May 04 07:10:00 +0000 2018
>Originator:     Martin Husemann
>Release:        NetBSD 8.99.14
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD unpluged.duskware.de 8.99.14 NetBSD 8.99.14 (UNPLUGED) #154: Thu May 3 14:08:58 CEST 2018 martin%seven-days-to-the-wolves.aprisoft.de@localhost:/work/src/sys/arch/evbarm/compile/UNPLUGED evbarm
Architecture: earm
Machine: evbarm
>Description:

During the last test run (not sure yet if this is reproducable), this
machine crashed:

[ 12619.6852435] data_abort_handler: data_aborts fsr=0x1 far=0xcd427f6c
[ 12619.6852435] Fatal kernel mode data abort: 'Alignment Fault 1'
[ 12619.6852435] trapframe: 0xcd427e28
[ 12619.6852435] FSR=00000001, FAR=cd427f6c, spsr=80000013
[ 12619.6852435] r0 =00001000, r1 =cd427f54, r2 =cd427f48, r3 =00000002
[ 12619.6852435] r4 =000000c5, r5 =c04cf320, r6 =00000003, r7 =cd427f48
[ 12619.6852435] r8 =cd427f48, r9 =c3c6ede0, r10=bbefc400, r11=cd427efc
[ 12619.6852435] r12=00001002, ssp=cd427e78, slr=00000000, pc =c024e34c 

db> bt
0xcd427efc: netbsd:sys_mmap+0x10
0xcd427f34: netbsd:sys_syscall+0x60
0xcd427fac: netbsd:syscall+0x9c
db> ps
PID    LID S CPU     FLAGS       STRUCT LWP *               NAME WAIT
25486>   1 7   0         0           c2f79980               test
12798    1 3   0        80           c435a860          atf-check wait
12826    1 3   0        80           c3cfe1e0                 sh wait
653      1 3   0        80           c2f15680                tee pipe_rd
619      1 3   0        80           c2f15c00         atf-report pipe_rd
709      1 3   0        80           c2f153c0                tee pipe_rd
796      1 3   0        80           c2f15940            atf-run select
[..]

>How-To-Repeat:
s/a

>Fix:
n/a