Based on

From 5e7fdabd7df1fc6c56d104e61390bf5a6b526c38 Mon Sep 17 00:00:00 2001
From: Andreas Schwab <schwab@suse.de>
Date: Wed, 18 Nov 2015 15:45:59 +0100
Subject: [PATCH] Fix resource leak in resolver (bug 19257)

diff -Naur a/resolv/res_init.c b/resolv/res_init.c
--- a/resolv/res_init.c	2017-12-15 12:44:11.275859356 +0530
+++ b/resolv/res_init.c	2017-12-15 12:44:47.387858571 +0530
@@ -594,7 +594,7 @@
 		statp->_vcsock = -1;
 		statp->_flags &= ~(RES_F_VC | RES_F_CONN);
 	}
-	for (ns = 0; ns < statp->_u._ext.nscount; ns++)
+	for (ns = 0; ns < statp->nscount; ns++)
 		if (statp->_u._ext.nsaddrs[ns]) {
 			if (statp->_u._ext.nssocks[ns] != -1) {
 				close_not_cancel_no_status(statp->_u._ext.nssocks[ns]);