port-arm/50086: crash while unpacking sets

[martin%NetBSD.org@localhost]

>Number:         50086
>Category:       port-arm
>Synopsis:       crash while unpacking sets
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    port-arm-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Jul 25 14:00:00 +0000 2015
>Originator:     Martin Husemann
>Release:        NetBSD 7.99.20
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD space-truckin.duskware.de 7.99.20 NetBSD 7.99.20 (CUBIETRUCK) #205: Sat Jul 25 15:38:26 CEST 2015 martin%night-owl.duskware.de@localhost:/usr/src/sys/arch/evbarm/compile/CUBIETRUCK evbarm
Architecture: earmv7hfeb
Machine: evbarm
>Description:

Trying to unpack all sets to a local sata disk caused this crash for me:

panic: kernel diagnostic assertion "ok" failed: file "../../../../arch/arm/arm32/pmap.c", line 7878 
cpu0: Begin traceback...
0xbfcb1a5c: netbsd:db_panic+0xc
0xbfcb1a8c: netbsd:vpanic+0x1b0
0xbfcb1aa4: netbsd:__udivmoddi4
0xbfcb1adc: netbsd:pmap_map_poolpage+0x64
0xbfcb1b2c: netbsd:uvm_km_kmem_alloc+0x148
0xbfcb1b44: netbsd:pool_page_alloc+0x3c
0xbfcb1b84: netbsd:pool_grow+0x38
0xbfcb1bbc: netbsd:pool_get+0x78
0xbfcb1c04: netbsd:pool_cache_get_slow+0x224
0xbfcb1c3c: netbsd:pool_cache_get_paddr+0x210
0xbfcb1c5c: netbsd:vnalloc+0x2c
0xbfcb1ca4: netbsd:vcache_new+0x78
0xbfcb1cec: netbsd:ufs_makeinode+0x40
0xbfcb1d14: netbsd:ufs_create+0x4c
0xbfcb1d54: netbsd:VOP_CREATE+0x4c
0xbfcb1e2c: netbsd:vn_open+0x15c
0xbfcb1eac: netbsd:do_open+0xb0
0xbfcb1edc: netbsd:do_sys_openat+0x7c
0xbfcb1f04: netbsd:sys_open+0x38
0xbfcb1f7c: netbsd:syscall+0x84
0xbfcb1fac: netbsd:swi_handler+0xa0
cpu0: End traceback...

Unfortunately savecore failed:
savecore: kvm_read: L1 entry is invalid: Undefined error: 0

>How-To-Repeat:

copy all sets to /tmp
foreach tar (/tmp/*.tgz)
tar xpzf $tar
end

>Fix:
n/a