From e9a55abce483f2dd07e5d5f5dc73be352745784f Mon Sep 17 00:00:00 2001
From: Noel Kuntze <noel.kuntze@thermi.consulting>
Date: Sat, 17 Apr 2021 05:02:01 +0200
Subject: [PATCH] forecast: Restrict strncpy() call

Closes strongswan/strongswan#331.
---
 src/libcharon/plugins/forecast/forecast_forwarder.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/libcharon/plugins/forecast/forecast_forwarder.c b/src/libcharon/plugins/forecast/forecast_forwarder.c
index 42b57b10b..4bb6ef337 100644
--- a/src/libcharon/plugins/forecast/forecast_forwarder.c
+++ b/src/libcharon/plugins/forecast/forecast_forwarder.c
@@ -361,7 +361,8 @@ static int get_ifindex(private_kernel_listener_t *this, char *ifname)
 {
 	struct ifreq ifr = {};
 
-	strncpy(ifr.ifr_name, ifname, IFNAMSIZ);
+	strncpy(ifr.ifr_name, ifname, IFNAMSIZ-1);
+
 	if (ioctl(this->raw, SIOCGIFINDEX, &ifr) == 0)
 	{
 		return ifr.ifr_ifindex;