uvm_fault(0xfffffd807685f670, 0x8, 0, 1) -> e
fatal page fault in supervisor mode
trap type 6 code 0 rip ffffffff821b38ee cs 8 rflags 10246 cr2 8 cpl 0 rsp ffff80002e8466d0
gsbase 0xffffffff82b24ff0  kgsbase 0x0
panic: trap type 6, code=0, pc=ffffffff821b38ee
Starting stack trace...
panic(ffffffff8271f8d4) at panic+0x155 sys/kern/subr_prf.c:229
kerntrap(ffff80002e846620) at kerntrap+0x1b7 sys/arch/amd64/amd64/trap.c:334
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
fifo_write(ffff80002e846720) at fifo_write+0x4e sys/miscfs/fifofs/fifo_vnops.c:272
VOP_WRITE(fffffd8072683db0,ffff80002e8467b8,8,fffffd807f7d7888) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245
vn_rdwr(1,fffffd8072683db0,ffff800021660000,81,0,1,6279a286fcbfb04e,ffff80002e8468e0,fffffd8072683db0,78) at vn_rdwr+0xe9 sys/kern/vfs_vnops.c:324
ufs_symlink(ffff80002e8468e0) at ufs_symlink+0x136 sys/ufs/ufs/ufs_vnops.c:1386
VOP_SYMLINK(fffffd8074c9b008,ffff80002e846a60,ffff80002e846a90,ffff80002e846990,ffff800021660000) at VOP_SYMLINK+0xd0 sys/kern/vfs_vops.c:426
dosymlinkat(ffff800021713b60,20000000,ffffff9c,20000080) at dosymlinkat+0x154 sys/kern/vfs_syscalls.c:1802
syscall(ffff80002e846c10) at syscall+0x4e6 sys/arch/amd64/amd64/trap.c:626
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x4c4531898f0, count: 246
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 b8ebca54-f078-3963-d083-dfcbe7348693
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 0x000f27d0: 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