--- db-5.3.21/src/db/db_cam.c.opd_deadlock	2017-10-31 12:20:54.118979690 +0100

+++ db-5.3.21/src/db/db_cam.c	2017-10-31 12:21:06.828739341 +0100

@@ -868,6 +868,11 @@

 	    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)