witness: thread 0xffff8000212a4008 exiting with the following locks held:
exclusive rwlock solock r = 0 (0xfffffd8069515028)
#0  witness_lock+0x44d
#1  unp_solock_peer+0x64 sys/kern/uipc_usrreq.c:168
#2  uipc_usrreq+0x7c6 sys/kern/uipc_usrreq.c:350
#3  sosend+0x61b sys/kern/uipc_socket.c:657
#4  sendit+0x65d sys/kern/uipc_syscalls.c:682
#5  sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:589
#6  syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline]
#6  syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585
#7  Xsyscall+0x128
panic: thread 0xffff8000212a4008 cannot exit while holding sleeplocks
Starting stack trace...
panic(ffffffff825be0d3) at panic+0x16b sys/kern/subr_prf.c:233
witness_thread_exit(ffff8000212a4008) at witness_thread_exit+0x32c sys/kern/subr_witness.c:1396
reaper(ffff8000212337a8) at reaper+0x15b sys/kern/kern_exit.c:435
end trace frame: 0x0, count: 254
End of stack trace.