1 files changed, 3 insertions, 2 deletions
diff --git a/ethtool.c b/ethtool.c
index 7d408be..8401582 100644
--- a/ethtool.c
+++ b/ethtool.c
@@ -624,9 +624,10 @@ static void parse_cmdline(int argc, char **argp)
 
 	}
 
-	if (devname == NULL) {
+	if (devname == NULL)
+		show_usage(1);
+	if (strlen(devname) >= IFNAMSIZ)
 		show_usage(1);
-	}
 }
 
 static void dump_supported(struct ethtool_cmd *ep)