From 73d83e2bc96111d692685d3c750cbb53ed685299 Mon Sep 17 00:00:00 2001
From: Sepherosa Ziehau <sephe@dragonflybsd.org>
Date: Sun, 12 Feb 2017 21:35:19 +0800
Subject: [PATCH] pktgen: Ifnet lock is required by ifunit.

---
 tools/tools/netrate/pktgen/pktgen.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/tools/tools/netrate/pktgen/pktgen.c b/tools/tools/netrate/pktgen/pktgen.c
index d15129fe7a..5b0ecf998f 100644
--- a/tools/tools/netrate/pktgen/pktgen.c
+++ b/tools/tools/netrate/pktgen/pktgen.c
@@ -313,7 +313,13 @@ pktgen_config(struct pktgen *pktg, const struct pktgen_conf *conf)
 		}
 	}
 
+	/*
+	 * XXX NOT MPSAFE.
+	 * Make sure that pc_ifname is not gone.
+	 */
+	ifnet_lock();
 	ifp = ifunit(conf->pc_ifname);
+	ifnet_unlock();
 	if (ifp == NULL) {
 		error = ENXIO;
 		goto failed;
-- 
2.11.4.GIT