From 589c302e0b1c662d8cc25846e861ea0f8eed89f4 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Thu, 5 Jul 2012 18:16:31 +0200
Subject: [PATCH] zero-initialize the ifreq when setting interfaces up or down

---
 system-linux.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/system-linux.c b/system-linux.c
index c4d094d..24ea2e3 100644
--- a/system-linux.c
+++ b/system-linux.c
@@ -350,6 +350,8 @@ static int system_if_resolve(struct device *dev)
 static int system_if_flags(const char *ifname, unsigned add, unsigned rem)
 {
 	struct ifreq ifr;
+
+	memset(&ifr, 0, sizeof(ifr));
 	strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
 	ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr);
 	ifr.ifr_flags |= add;
-- 
2.25.1