panic: solock: lock not held
Starting stack trace...
panic(ffffffff8254949d) at panic+0x155 sys/kern/subr_prf.c:229
rw_assert_wrlock(fffffd80570c23b8) at rw_assert_wrlock+0xb7 sys/kern/kern_rwlock.c:388
sbunlock(fffffd80570c23b0,fffffd80570c24d8) at sbunlock+0xc9 soassertlocked sys/kern/uipc_socket2.c:414 [inline]
sbunlock(fffffd80570c23b0,fffffd80570c24d8) at sbunlock+0xc9 sys/kern/uipc_socket2.c:479
sosplice(fffffd807ace2220,3,0,0) at sosplice+0x547
sosetopt(fffffd807ace2220,ffff,1023,fffffd8061f54d00) at sosetopt+0x7ec
sys_setsockopt(ffff80002321c000,ffff80002e92da38,ffff80002e92da90) at sys_setsockopt+0x1f5 sys/kern/uipc_syscalls.c:1233

syscall(ffff80002e92db00) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x138e81ef330, count: 249
End of stack trace.
syncing disks...28 19 2 1 1 1 1 1 set $lines = 0
1 1 1 set $maxwidth = 0
1 1 show panic
1 1 trace
1 1 show registers
1 show proc
ps
1 show all locks
show malloc
1 show all pools
machine ddbcpu 0
trace
 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 29e59ed8-cf7d-ff95-0f1a-46f3bc188dc1
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> trace
|/-\|/-\|/booting hd0a:trace: -\|/open hd0a:trace: No such file or directory
 failed(2). will try /bsd