From 5d936aa181dd8b8a3d0a30cd1a41d1983719546e Mon Sep 17 00:00:00 2001
From: Ian Dowse <iedowse@FreeBSD.org>
Date: Sun, 11 Mar 2001 17:50:19 +0000
Subject: [PATCH] In ip_output(), initialise `ia' in the case where the packet
 has come from a dummynet pipe. Without this, the code which increments the
 per-ifaddr stats can dereference an uninitialised pointer. This should make
 dummynet usable again.

Reported by:	"Dmitry A. Yanko" <fm@astral.ntu-kpi.kiev.ua>
Reviewed by:	luigi, joe
---
 sys/netinet/ip_output.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sys/netinet/ip_output.c b/sys/netinet/ip_output.c
index eaac5603a984..bca751db281d 100644
--- a/sys/netinet/ip_output.c
+++ b/sys/netinet/ip_output.c
@@ -180,6 +180,7 @@ ip_output(m0, opt, ro, flags, imo)
 #endif
             ip = mtod(m, struct ip *);
             hlen = IP_VHL_HL(ip->ip_vhl) << 2 ;
+            ia = (struct in_ifaddr *)ro->ro_rt->rt_ifa;
             goto sendit;
         } else
             rule = NULL ;