uvm_fault(0xfffff9007f227e60, 0xf, 0, 1) -> e
fatal page fault in supervisor mode
trap type 6 code 0 rip ffffffff824811f8 cs 8 rflags 10246 cr2 f cpl 0 rsp ffff8000360cba80
gsbase 0xffffffff838c5ff0  kgsbase 0x0
panic: trap type 6, code=0, pc=ffffffff824811f8
Starting stack trace...
panic(ffffffff834bffc4) at panic+0x1ba sys/kern/subr_prf.c:229
kerntrap(ffff8000360cb9d0) at kerntrap+0x2fb
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
ktrops(ffff80002a7854d8,ffffffffffffffff,0,a0c7fd9f,fffff9006f08b0f8,fffff90007ffd6e8) at ktrops+0x58 ktrcanset sys/kern/kern_ktrace.c:728 [inline]
ktrops(ffff80002a7854d8,ffffffffffffffff,0,a0c7fd9f,fffff9006f08b0f8,fffff90007ffd6e8) at ktrops+0x58 sys/kern/kern_ktrace.c:571
doktrace(fffff9006f08b0f8,4,20c7fd9f,0,ffff80002a7854d8) at doktrace+0x6bd ktrsetchildren sys/kern/kern_ktrace.c:596 [inline]
doktrace(fffff9006f08b0f8,4,20c7fd9f,0,ffff80002a7854d8) at doktrace+0x6bd sys/kern/kern_ktrace.c:518
sys_ktrace(ffff80002a7854d8,ffff8000360cbde0,ffff8000360cbd30) at sys_ktrace+0x11c sys/kern/kern_ktrace.c:559
syscall(ffff8000360cbde0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff8000360cbde0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:791
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xd50357a9440, count: 249
End of stack trace.

dump to dev 4,1 not possible
rebooting...
SeaBIOS (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 1498d526-897b-4d0e-28be-a262cd523d51
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 0x000f2600: 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 3.67
boot> set $lines = 0
set: syntax error
boot> set $maxwidth = 0
set: syntax error
boot> show panic
boot: illegal argument panic
boot> show kasan
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
boot>