Index: sys/kern/uipc_socket.c
===================================================================
--- sys/kern/uipc_socket.c	(revision 225011)
+++ sys/kern/uipc_socket.c	(working copy)
@@ -659,6 +659,8 @@ sofree(struct socket *so)
 	 * before calling pru_detach.  This means that protocols shold not
 	 * assume they can perform socket wakeups, etc, in their detach code.
 	 */
+	selwakeup(&so->so_snd.sb_sel);
+	selwakeup(&so->so_rcv.sb_sel);
 	sbdestroy(&so->so_snd, so);
 	sbdestroy(&so->so_rcv, so);
 	knlist_destroy(&so->so_rcv.sb_sel.si_note);