From 323a38819a3da43924c0f50cfab7ccfe82e4565e Mon Sep 17 00:00:00 2001
From: Simon Brummer <simon.brummer@posteo.de>
Date: Sun, 10 Jun 2018 17:01:05 +0200
Subject: [PATCH] native: Enforce safe strncpy usage in tap device setup
---
cpu/native/netdev_tap/netdev_tap.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/cpu/native/netdev_tap/netdev_tap.c b/cpu/native/netdev_tap/netdev_tap.c
index e686093a5f..616fd32ad1 100644
--- a/cpu/native/netdev_tap/netdev_tap.c
+++ b/cpu/native/netdev_tap/netdev_tap.c
@@ -300,7 +300,8 @@ static int _send(netdev_t *netdev, const iolist_t *iolist)
void netdev_tap_setup(netdev_tap_t *dev, const netdev_tap_params_t *params) {
dev->netdev.driver = &netdev_driver_tap;
- strncpy(dev->tap_name, *(params->tap_name), IFNAMSIZ);
+ strncpy(dev->tap_name, *(params->tap_name), IFNAMSIZ - 1);
+ dev->tap_name[IFNAMSIZ - 1] = '\0';
}
static void _tap_isr(int fd, void *arg) {
--
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