uvm_fault(0xffffffff82a348f0, 0xffff8000179d23c0, 0, 2) -> d
fatal page fault in supervisor mode
trap type 6 code 2 rip ffffffff824d95be cs 8 rflags 10206 cr2 ffff8000179d23c0 cpl 0 rsp ffff80002d6f0b08
gsbase 0xffffffff82981ff0  kgsbase 0x0
panic: trap type 6, code=2, pc=ffffffff824d95be
Starting stack trace...
panic(ffffffff825a34bd) at panic+0x16b sys/kern/subr_prf.c:229
kerntrap(ffff80002d6f0a50) at kerntrap+0x1c7 sys/arch/amd64/amd64/trap.c:327
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
memset() at memset+0x4e
ffs_write(ffff80002d6f0de0) at ffs_write+0x93c
VOP_WRITE(fffffd807771e948,ffff80002d6f0e78,23,fffffd807f7d76e8) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245
vn_rdwr(1,fffffd807771e948,ffff80002d6f0f68,40,0,1,be9c03d0ca9751f8,0,ffff80002841e7e8,fffffd807771e948) at vn_rdwr+0xe9 sys/kern/vfs_vnops.c:324
acct_process(ffff80002841e7e8) at acct_process+0x62c sys/kern/kern_acct.c:243
exit1(ffff80002841e7e8,0,0,1) at exit1+0x3a7 sys/kern/kern_exit.c:209
sys_exit(ffff80002841e7e8,ffff80002d6f10e0,ffff80002d6f1130) at sys_exit+0x16 sys/kern/kern_exit.c:89
syscall(ffff80002d6f11b0) at syscall+0x438 mi_syscall sys/sys/syscall_mi.h:101 [inline]
syscall(ffff80002d6f11b0) at syscall+0x438 sys/arch/amd64/amd64/trap.c:599
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7fffffb7c0, count: 245
End of stack trace.

dump to dev 4,1 not possible
rpaenbico:o tkineg.rne..l
 diagnostic assSeaBIOS (version 1.8.2-google)
Total RAM Size = 0x0000000080000000 = 2048 MiB
CPUs found: 2     Max CPUs supported: 2
SeaBIOS (version 1.8.2-google)
Machine UUID facdd91b-51c3-88c8-dda6-9406d7e40e23
found virtio-scsi at 0:3
virtio-scsi vendor='Google' product='PersistentDisk' rev='1' type=0 removable=0
virtio-scsi blksize=512 sectors=4194304 = 2048 MiB
drive 0x000f2480: PCHS=0/0/0 translation=lba LCHS=520/128/63 s=4194304
Sending Seabios boot VM event.
Booting from Hard Disk 0...
>> OpenBSD/amd64 BOOT 3.55
boot> set $lines = 0
set: syntax error
boot> set $maxwidth = 0
set: syntax error
boot> show panic
boot: illegal argument panic
boot> trace
boot> show registers
boot> show proc
boot> ps
boot> show all locks
boot> show malloc
boot> show all pools
boot> machine ddbcpu 0
machine: syntax error
boot> trace
boot> machine ddbcpu 1
machine: syntax error
boot> trace