NetBSD 9.2 panic

[John Klos <john%ziaspace.com@localhost>]

Does anyone know what might be the cause of this? This is a Sun Fire V245 
running NetBSD 9.2 from 17-October-2021:

1 tt=30 tstate=4411001504 tpc=0x1001488 tnpc=0x100148c
2 tt=30 tstate=9982000602 tpc=0x155c7c0 tnpc=0x155c7c4
Stopped in pid 4239.1 (sh) at   1010438:        nop
db{1}> sync
Frame pointer is at 0xe004edf1
[ 5215040.5606280] Call traceback:
[ 5215040.5606280]  netbsd:cpu_reboot+0x244(a, 1c92320, f, 1c63000, f, 1c6fc00) fp = e004eed1
[ 5215040.5606280]  netbsd:db_sync_cmd+0x20(100, 0, 1c3cc00, 1cb7800, f, 170952600) fp = e004ef81
[ 5215040.5606280]  netbsd:db_command+0xb4(1010438, 0, ffffffffffffffff, e004f8f0, 1c3cc58, 1ca6de8) fp = e004f031
[ 5215040.5606280]  netbsd:db_command_loop+0xb8(1c3cc38, 1ca6c00, 1c3c800, 0, 1823350, 1c62400) fp = e004f171
[ 5215040.5606280]  netbsd:db_trap+0x104(101043c, 1000000, 18d8840, 1c3cc00, 1ca6c00, 1c3cc38) fp = e004f251
[ 5215040.5606280]  netbsd:kdb_trap+0xdc(101, 0, 2, e0048000, 1ca7c00, 0) fp = e004f311
[ 5215040.5606280]  netbsd:trap+0x39c(101, e004fe20, f, 1c03800, 1c00000, 1cbf800) fp = e004f3c1
[ 5215040.5606280]  netbsd:101155c+0(e004fe20, 101, 1010434, 140414, 1c62400, e0048000) fp = e004f571
[ 5215040.5606280]  netbsd:112c38+0(1c010b0, 6, 7, ffffffffffff8320, 23b204, 23a848) fp = e004f751
[ 5215040.5606280]  netbsd:0+0(0, 0, 0, 0, 0, 131f29) fp = ffffffffffff75f1

[ 5215040.5606280] dumping to dev 7,9 offset 95
 16383 M

dmesg:
https://www.klos.com/~john/dmesg_sparc64.txt

John