From 28a437da50d2b13345eab4b36c7305b94ec4e008 Mon Sep 17 00:00:00 2001
From: jsg <jsg@openbsd.org>
Date: Sat, 18 Apr 2015 09:32:59 +0000
Subject: [PATCH] Avoid calling freeifaddrs() with an uninitialised pointer in
 an error path.

---
 usr.bin/systat/mbufs.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/usr.bin/systat/mbufs.c b/usr.bin/systat/mbufs.c
index 723cac82552..e58889c7ae5 100644
--- a/usr.bin/systat/mbufs.c
+++ b/usr.bin/systat/mbufs.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: mbufs.c,v 1.39 2015/01/20 18:26:57 deraadt Exp $ */
+/*	$OpenBSD: mbufs.c,v 1.40 2015/04/18 09:32:59 jsg Exp $ */
 /*
  * Copyright (c) 2008 Can Erkin Acar <canacar@openbsd.org>
  *
@@ -204,7 +204,7 @@ int
 read_mb(void)
 {
 	struct kinfo_pool pool;
-	struct ifaddrs *ifap, *ifa;
+	struct ifaddrs *ifap = NULL, *ifa;
 	struct if_info *ifi;
 	struct if_rxring_info *ifr;
 	int mib[4];
@@ -344,7 +344,8 @@ read_mb(void)
 	}
 
  exit:
-	freeifaddrs(ifap);
+	if (ifap)
+		freeifaddrs(ifap);
 	return (ret);
 }
 
-- 
2.20.1