uvm_fault(0xfffffd805b48e750, 0x7f86d7cb9df0, 0, 2) -> e
fatal page fault in supervisor mode
trap type 6 code 2 rip ffffffff830c400d cs 8 rflags 10246 cr2 7f86d7cb9df0 cpl a rsp ffff80003c97f6b0
gsbase 0xffffffff83910ff0  kgsbase 0x0
panic: trap type 6, code=2, pc=ffffffff830c400d
Starting stack trace...
panic(ffffffff834405a6) at panic+0x1ba sys/kern/subr_prf.c:229
kerntrap(ffff80003c97f600) at kerntrap+0x2fb
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
pmap_page_remove(fffffd8006de1900) at pmap_page_remove+0x43d _atomic_swap_64 sys/arch/amd64/compile/SYZKALLER/obj/machine/atomic.h:117 [inline]
pmap_page_remove(fffffd8006de1900) at pmap_page_remove+0x43d sys/arch/amd64/amd64/pmap.c:2014
uvm_anfree(fffffd805f4d6258) at uvm_anfree+0xd8 sys/uvm/uvm_anon.c:111
amap_wipeout(fffffd807017e4d0) at amap_wipeout+0x246 sys/uvm/uvm_amap.c:-1
uvm_unmap_detach(ffff80003c97f840,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1359
uvm_map_teardown(fffffd805b48e750) at uvm_map_teardown+0x357 sys/uvm/uvm_map.c:2536
exit1(ffff80002a80f268,43,0,1) at exit1+0x6e6 sys/kern/kern_exit.c:259
sys_exit(ffff80002a80f268,ffff80003c97fa00,ffff80003c97f950) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80003c97fa00) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80003c97fa00) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x732d54d053e0, count: 245
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 0x000f26c0: 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