syzbot

uvm_fault(0xfffffd807c457748, 0x2440, 0, 2) -> e
fatal page fault in supervisor mode
trap type 6 code 2 rip ffffffff8178d9c7 cs 8 rflags 50202 cr2 2440 cpl 0 rsp ffff80003c9b4d80
gsbase 0xffffffff837fbff0  kgsbase 0x0
panic: trap type 6, code=2, pc=ffffffff8178d9c7
Starting stack trace...
panic(ffffffff8336fd75) at panic+0x1ba sys/kern/subr_prf.c:229
kerntrap(ffff80003c9b4cd0) at kerntrap+0x2fb
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
copyout() at copyout+0x57
syscall(ffff80003c9b5100) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80003c9b5100) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xd4a8fef93e0, count: 251
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 016acda6-80d9-6675-f1e2-930bbf0c87d3
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 0x000f2820: 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 $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