Author:  <stenn@psp-at1.ntp.org>
Date:   Fri Jul 31 07:58:11 2015 +0000

    [Bug 2890] Ignore ENOBUFS on routing netlink socket.  Konstantin Khlebnikov.

diff -up ntp-4.2.6p5/ntpd/ntp_io.c.netlinknobuf ntp-4.2.6p5/ntpd/ntp_io.c
--- ntp-4.2.6p5/ntpd/ntp_io.c.netlinknobuf	2019-01-11 12:34:09.115195268 +0100
+++ ntp-4.2.6p5/ntpd/ntp_io.c	2019-01-11 12:34:21.356195246 +0100
@@ -4480,10 +4480,15 @@ process_routing_msgs(struct asyncio_read
 	cnt = read(reader->fd, buffer, sizeof(buffer));
 	
 	if (cnt < 0) {
-		msyslog(LOG_ERR,
-			"i/o error on routing socket %m - disabling");
-		remove_asyncio_reader(reader);
-		delete_asyncio_reader(reader);
+		if (errno == ENOBUFS) {
+			msyslog(LOG_ERR,
+				"routing socket reports: %m");
+		} else {
+			msyslog(LOG_ERR,
+				"routing socket reports: %m - disabling");
+			remove_asyncio_reader(reader);
+			delete_asyncio_reader(reader);
+		}
 		return;
 	}