From ad5ae47a0d159ea473c9730d7e0298a3e5d31cf6 Mon Sep 17 00:00:00 2001
From: sadag <sadasg@gmail.com>
Date: Fri, 20 May 2016 04:26:27 -0700
Subject: [PATCH] sd-dhcp-client: fix busy loop reading zero sized DHCP UDP
 packets. (#3299)

---
 src/libsystemd-network/sd-dhcp-client.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/libsystemd-network/sd-dhcp-client.c b/src/libsystemd-network/sd-dhcp-client.c
index 3846cf7476..123169832c 100644
--- a/src/libsystemd-network/sd-dhcp-client.c
+++ b/src/libsystemd-network/sd-dhcp-client.c
@@ -1636,6 +1636,9 @@ static int client_receive_message_udp(
         if (buflen < 0)
                 return buflen;
 
+        if (buflen == 0)
+                buflen = 1;
+
         message = malloc0(buflen);
         if (!message)
                 return -ENOMEM;