From 251befa78d72c4a99adcb183f912b556c978da4b Mon Sep 17 00:00:00 2001
From: bluhm <bluhm@openbsd.org>
Date: Wed, 17 Aug 2016 13:53:14 +0000
Subject: [PATCH] Fix an mbuf leak and missing error propagation in
 uipc_usrreq(PRU_SEND) in case sbappendcontrol() fails. From Simon Mages; OK
 mikeb@

---
 sys/kern/uipc_usrreq.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/sys/kern/uipc_usrreq.c b/sys/kern/uipc_usrreq.c
index 775aedf432e..6e3d08fe398 100644
--- a/sys/kern/uipc_usrreq.c
+++ b/sys/kern/uipc_usrreq.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: uipc_usrreq.c,v 1.100 2016/07/19 05:30:48 tedu Exp $	*/
+/*	$OpenBSD: uipc_usrreq.c,v 1.101 2016/08/17 13:53:14 bluhm Exp $	*/
 /*	$NetBSD: uipc_usrreq.c,v 1.18 1996/02/09 19:00:50 christos Exp $	*/
 
 /*
@@ -254,6 +254,10 @@ uipc_usrreq(struct socket *so, int req, struct mbuf *m, struct mbuf *nam,
 			if (control) {
 				if (sbappendcontrol(rcv, m, control))
 					control = NULL;
+				else {
+					error = ENOBUFS;
+					break;
+				}
 			} else if (so->so_type == SOCK_SEQPACKET)
 				sbappendrecord(rcv, m);
 			else
-- 
2.20.1