From 1f8b93686f775588c2febb6d06bb6b9e2260255c Mon Sep 17 00:00:00 2001
From: Joan Lledó <joanlluislledo@gmail.com>
Date: Sat, 11 Aug 2018 18:17:10 +0200
Subject: lwip: Fix a buffer overflow and clear compiler warnings

GCC 8 new warning -Wstringop-truncation detected some buffer overflows.

* lwip/options.c (parse_opt): Fix the buffer overflow.
* lwip/pfinet-ops.c (dev_ifconf): Likewise.
---
 lwip/options.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'lwip/options.c')

diff --git a/lwip/options.c b/lwip/options.c
index 6591ac52..d35b9f32 100644
--- a/lwip/options.c
+++ b/lwip/options.c
@@ -133,7 +133,7 @@ parse_opt (int opt, char *arg, struct argp_state *state)
 	}
       in = h->curint;
 
-      strncpy (in->dev_name, arg, DEV_NAME_LEN);
+      strncpy (in->dev_name, arg, sizeof(in->dev_name)-1);
       break;
 
     case 'a':
-- 
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