panic: lock (rwlock) solock not locked
Starting stack trace...
panic(ffffffff82583901) at panic+0x16b sys/kern/subr_prf.c:229
witness_assert(fffffd806e1a27d0,4) at witness_assert+0x3ef sys/kern/subr_witness.c:1950
sbunlock(fffffd806e1a27b8,fffffd806e1a2900) at sbunlock+0xc9 soassertlocked sys/kern/uipc_socket2.c:414 [inline]
sbunlock(fffffd806e1a27b8,fffffd806e1a2900) at sbunlock+0xc9 sys/kern/uipc_socket2.c:479
sosplice(fffffd806e1a25d0,3,0,fffffd80087ae010) at sosplice+0x550
sosetopt(fffffd806e1a25d0,ffff,1023,fffffd8078fdcd00) at sosetopt+0x7f4
sys_setsockopt(ffff800021297508,ffff80002ca4e6e8,ffff80002ca4e730) at sys_setsockopt+0x1f6 sys/kern/uipc_syscalls.c:1233
syscall(ffff80002ca4e7b0) at syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline]
syscall(ffff80002ca4e7b0) at syscall+0x435 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xc843df182e0, count: 249
End of stack trace.
syncing disks...25 14  done

dump to dev 4,1 not possible
rpebanoioct:i nkge.r.n.el
 diagnosticSeaBIOS (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 cacfac85-bd04-7459-f730-6e0582505e9f
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