File 0001-OPD-deadlock-RH-BZ-1349779.patch of Package libdb-4_8

From 5124401571fa1807a6595659ab7a069f17fe1068 Mon Sep 17 00:00:00 2001
From: William Brown <william@blackhats.net.au>
Date: Tue, 27 Aug 2019 10:01:54 +1000
Subject: [PATCH] OPD deadlock: RH BZ 1349779

---
 db/db_cam.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/db/db_cam.c b/db/db_cam.c
index 4c1322d..7f133e5 100644
--- a/db/db_cam.c
+++ b/db/db_cam.c
@@ -850,6 +850,11 @@ __dbc_iget(dbc, key, data, flags)
 	    flags == DB_PREV || flags == DB_PREV_DUP)) {
 		if (tmp_rmw && (ret = dbc->am_writelock(dbc)) != 0)
 			goto err;
+		/* Latch the primary tree page here in order to not deadlock later. */
+		if (cp->page == NULL &&
+			(ret = __memp_fget(mpf, &cp->pgno,
+			dbc->thread_info, dbc->txn, 0, &cp->page)) != 0)
+			goto err;
 		if (F_ISSET(dbc, DBC_TRANSIENT))
 			opd = cp->opd;
 		else if ((ret = __dbc_idup(cp->opd, &opd, DB_POSITION)) != 0)
-- 
2.20.1 (Apple Git-117)