From ff8d9e8fcecc3cc8ace64b6cdeafdb11cf9854f3 Mon Sep 17 00:00:00 2001
From: "A. Wilcox" <AWilcox@Wilcox-Tech.com>
Date: Thu, 14 Nov 2019 15:08:14 -0600
Subject: Qt UI: Use strnlen since we know the safe max

---
 ui/qt5/horizonwizard.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'ui/qt5/horizonwizard.cc')

diff --git a/ui/qt5/horizonwizard.cc b/ui/qt5/horizonwizard.cc
index d761db1..72ede4f 100644
--- a/ui/qt5/horizonwizard.cc
+++ b/ui/qt5/horizonwizard.cc
@@ -119,7 +119,7 @@ std::map<std::string, HorizonWizard::NetworkInterface> probe_ifaces(void) {
         int my_sock = ::socket(AF_INET, SOCK_STREAM, 0);
         if(my_sock != -1) {
             memset(&request, 0, sizeof(request));
-            memcpy(&request.ifr_name, cifname, strlen(cifname));
+            memcpy(&request.ifr_name, cifname, strnlen(cifname, IFNAMSIZ));
             errno = 0;
             if(ioctl(my_sock, SIOCGIFHWADDR, &request) != -1) {
                 char *buf;
-- 
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