From 3de93d194a5d27cabfe40ddf58aea36939498ba4 Mon Sep 17 00:00:00 2001
From: DJ Delorie <dj@redhat.com>
Date: Mon, 25 Sep 2017 19:43:09 -0400
Subject: nscd: Release read lock after resetting timeout.

	[BZ #22161]
	* nscd/netgroupcache.c (addinnetgrX): Release read lock after
	resetting timeout.

Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Reviewed-by: Andreas Schwab <schwab@suse.de>

A lock is held by mempool_allocate() when CACHEABLE is true; we
must release this lock if we exit early.

diff -rup a/nscd/netgroupcache.c b/nscd/netgroupcache.c
--- a/nscd/netgroupcache.c	2017-09-19 15:37:22.000000000 -0400
+++ b/nscd/netgroupcache.c	2017-09-20 16:33:54.982679050 -0400
@@ -586,6 +586,8 @@ addinnetgrX (struct database_dyn *db, in
       dh->timeout = timeout;
       dh->ttl = dataset->head.ttl;
       ++dh->nreloads;
+      if (cacheable)
+	pthread_rwlock_unlock (&db->lock);
       return timeout;
     }