panic: trap type 8, code=0, pc=ffffffff81224cff
Starting stack trace...
panic(ffffffff8259e763) at panic+0x16b sys/kern/subr_prf.c:229
kerntrap(ffff8000213143b0) at kerntrap+0x1c7 sys/arch/amd64/amd64/trap.c:313
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
rc4_keysetup(ffff8000213187fa,ffff80002131890c,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41
pipex_mppe_init(ffff8000213187c0,4c8c,6883,ffff8000006d1a6c,4c8c) at 
pipex_mppe_init+0x212
pipex_init_session(ffff800021314638,ffff8000006d1800) at pipex_init_session+0x5e1 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline]
pipex_init_session(ffff800021314638,ffff8000006d1800) at pipex_init_session+0x5e1 sys/net/pipex.c:385
pppacioctl(4086334,82907003,ffff8000006d1800,1,ffff800029647a40) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline]
pppacioctl(4086334,82907003,ffff8000006d1800,1,ffff800029647a40) at pppacioctl+0x156 sys/net/if_pppx.c:1165
VOP_IOCTL(fffffd8066cfc028,82907003,ffff8000006d1800,1,fffffd807f7d7820,ffff800029647a40) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264
vn_ioctl(fffffd806a0f49a0,82907003,ffff8000006d1800,ffff800029647a40) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:525
sys_ioctl(ffff800029647a40,ffff800021314988,ffff8000213149d0) at sys_ioctl+0x4a2
syscall(ffff800021314a50) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline]
syscall(ffff800021314a50) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xef47556c700, count: 245
End of stack trace.
syncing disks...panic: ffs_update: bad link cnt
Starting stack trace...
panic(ffffffff8263a76e) at panic+0x16b sys/kern/subr_prf.c:229
ffs_update(fffffd8068552558,0) at ffs_update+0x303 sys/ufs/ffs/ffs_inode.c:101
VOP_FSYNC(fffffd8064937ca8,fffffd807f7d7820,2,ffff800029647a40) at VOP_FSYNC+0xce sys/kern/vfs_vops.c:311
ffs_sync_vnode(fffffd8064937ca8,ffff8000213140c0) at ffs_sync_vnode+0x180 sys/ufs/ffs/ffs_vfsops.c:1197
vfs_mount_foreach_vnode(ffff8000006d7c00,ffffffff81d3c470,ffff8000213140c0) at vfs_mount_foreach_vnode+0x55 sys/kern/vfs_subr.c:910
ffs_sync(ffff8000006d7c00,2,0,fffffd807f7d7820,ffff800029647a40) at ffs_sync+0x11f sys/ufs/ffs/ffs_vfsops.c:1248
sys_sync(ffff800029647a40,0,0) at sys_sync+0xbc sys/kern/vfs_syscalls.c:537
vfs_syncwait(ffff800029647a40,1) at vfs_syncwait+0x36
vfs_shutdown(ffff800029647a40) at vfs_shutdown+0x5d sys/kern/vfs_subr.c:1791
boot(100) at boot+0xc8 sys/arch/amd64/amd64/machdep.c:830
unmap_startup() at unmap_startup
panic(ffffffff8259e763) at panic+0x18b sys/kern/subr_prf.c:231
kerntrap(ffff8000213143b0) at kerntrap+0x1c7 sys/arch/amd64/amd64/trap.c:313
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
rc4_keysetup(ffff8000213187fa,ffff80002131890c,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41
pipex_mppe_init(ffff8000213187c0,4c8c,6883,ffff8000006d1a6c,4c8c) at pipex_mppe_init+0x212 sys/net/pipex.c:2319
pipex_init_session(ffff800021314638,ffff8000006d1800) at pipex_init_session+0x5e1 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline]
pipex_init_session(ffff800021314638,ffff8000006d1800) at pipex_init_session+0x5e1 sys/net/pipex.c:385
pppacioctl(4086334,82907003,ffff8000006d1800,1,ffff800029647a40) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline]
pppacioctl(4086334,82907003,ffff8000006d1800,1,ffff800029647a40) at pppacioctl+0x156 sys/net/if_pppx.c:1165
VOP_IOCTL(fffffd8066cfc028,82907003,ffff8000006d1800,1,fffffd807f7d7820,ffff800029647a40) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264
vn_ioctl(fffffd806a0f49a0,82907003,ffff8000006d1800,ffff800029647a40) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:525
sys_ioctl(ffff800029647a40,ffff800021314988,ffff8000213149d0) at sys_ioctl+0x4a2
syscall(ffff800021314a50) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline]
syscall(ffff800021314a50) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xef47556c700, count: 234
End of stack trace.

dump to dev 4,1 not possible
rpeabnoioct:i nkge..rn.
el diagnostic aSeaBIOS (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 003a59b7-54eb-38ca-1cfb-72bc238e03e5
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 0x000f24c0: 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 3.54
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