panic: tcp_output
Starting stack trace...
panic(ffffffff8254ebcf) at panic+0x155 sys/kern/subr_prf.c:229
tcp_output(ffff800000f08cf8) at tcp_output+0x2a72 sys/netinet/tcp_output.c:727
tcp_send(fffffd8068cf4ac0,fffffd80681fe900,fffffd80681feb00,fffffd80681fe600) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:953
sosend(fffffd8068cf4ac0,fffffd80681feb00,ffff8000231bac70,0,fffffd80681fe600,0) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline]
sosend(fffffd8068cf4ac0,fffffd80681feb00,ffff8000231bac70,0,fffffd80681fe600,0) at sosend+0x62a sys/kern/uipc_socket.c:646
sendit(ffff80002172cd20,3,ffff8000231badf0,0,ffff8000231baef0) at sendit+0x64d sys/kern/uipc_syscalls.c:694
sys_sendmsg(ffff80002172cd20,ffff8000231bae98,ffff8000231baef0) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601
syscall(ffff8000231baf60) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x300b8c69580, count: 249
End of stack trace.
syncing disks...29 24 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1  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 a0530fd3-c3ad-b54d-95aa-ef4c7d9dfdbd
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