From 86eaed93a40528859aa19a172ae633987e9f2248 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org>
Date: Fri, 1 Jan 2021 16:23:26 +0100
Subject: [PATCH] pppoe: Check if PPPoE discovery socket was created
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Signed-off-by: Pali Rohár <pali@kernel.org>
---
 pppd/plugins/pppoe/plugin.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pppd/plugins/pppoe/plugin.c b/pppd/plugins/pppoe/plugin.c
index f705b5f..de9b816 100644
--- a/pppd/plugins/pppoe/plugin.c
+++ b/pppd/plugins/pppoe/plugin.c
@@ -213,6 +213,10 @@ PPPOEConnectDevice(void)
     } else {
 	conn->discoverySocket =
             openInterface(conn->ifName, Eth_PPPOE_Discovery, conn->myEth);
+	if (conn->discoverySocket < 0) {
+	    error("Failed to create PPPoE discovery socket: %m");
+	    goto errout;
+	}
 	discovery(conn);
 	if (conn->discoveryState != STATE_SESSION) {
 	    error("Unable to complete PPPoE Discovery");
-- 
2.39.2