From a9e88a0a49a418e149c64e786543edff12040868 Mon Sep 17 00:00:00 2001
From: Richard Cochran <richardcochran@gmail.com>
Date: Sun, 11 Mar 2012 09:45:23 +0100
Subject: [PATCH] Fix segfault after missing transmit time stamp.

If the networking stack fails to provide a transmit time stamp, then we
might feed uninitialized stack data to the CMSG(3) macros. This can result
in a segfault or other badness.

The fix is to simply clear the control buffer in advance.

Signed-off-by: Richard Cochran <richardcochran@gmail.com>
---
 udp.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/udp.c b/udp.c
index 8a3dc7b..d097f98 100644
--- a/udp.c
+++ b/udp.c
@@ -257,6 +257,7 @@ static int receive(int fd, void *buf, int buflen,
 	struct msghdr msg;
 	struct timespec *ts = NULL;
 
+	memset(control, 0, sizeof(control));
 	memset(&msg, 0, sizeof(msg));
 	msg.msg_iov = &iov;
 	msg.msg_iovlen = 1;