From 2e1f8b2fc56598332c13c72006c7843cf725a2a6 Mon Sep 17 00:00:00 2001
From: Alexis <alexisr245@gmail.com>
Date: Fri, 23 Nov 2018 17:52:10 +0100
Subject: [PATCH] fix(network): check len of netlinkResponse

---
 src/modules/network.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/modules/network.cpp b/src/modules/network.cpp
index adacf252..cf100b4b 100644
--- a/src/modules/network.cpp
+++ b/src/modules/network.cpp
@@ -47,8 +47,10 @@ void waybar::modules::Network::worker()
 {
   thread_ = [this] {
     char buf[4096];
-    uint64_t len = netlinkResponse(sock_fd_, buf, sizeof(buf),
-      RTMGRP_LINK | RTMGRP_IPV4_IFADDR);
+    auto len = netlinkResponse(sock_fd_, buf, sizeof(buf), RTMGRP_LINK | RTMGRP_IPV4_IFADDR);
+    if (len == 0) {
+      return;
+    }
     bool need_update = false;
     bool new_addr = false;
     for (auto nh = reinterpret_cast<struct nlmsghdr *>(buf); NLMSG_OK(nh, len);