panic: kernel diagnostic assertion "sc->sc_dev == 0" failed: file "/syzkaller/managers/main/kernel/sys/net/if_tun.c", line 315
Starting stack trace...
panic(ffffffff829335f0) at panic+0x159 sys/kern/subr_prf.c:229
__assert(ffffffff828e6485,ffffffff828819b9,13b,ffffffff828c6a78) at __assert+0x29 sys/kern/subr_prf.c:157
tun_clone_destroy(ffff800000ddd800) at tun_clone_destroy+0x234 sys/net/if_tun.c:315
if_clone_destroy(ffff8000363d1890) at if_clone_destroy+0x132 sys/net/if.c:1384
sys_ioctl(ffff80002a678a68,ffff8000363d1a70,ffff8000363d19c0) at sys_ioctl+0x4a5
syscall(ffff8000363d1a70) at syscall+0x72a sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x83805213180, count: 250
End of stack trace.
syncing disks...19 3 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2  giving up

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 0fee9609-1d66-d0cb-3385-b9d53e0469ef
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 0x000f27c0: 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 3.65
boot> machine ddbcpu 0
machine: syntax error
boot> trace
|/-\|/-\|/booting hd0a:trace: -\|/open hd0a:trace: No such file or directory
 failed(2). will try /bsd
boot> machine ddbcpu 1
machine: syntax error
boot> trace