From ce93ee3a7705929d4779cba8722a32c7129d3501 Mon Sep 17 00:00:00 2001
From: Michael Cahill <michael.cahill@mongodb.com>
Date: Mon, 13 Nov 2017 13:25:31 +1100
Subject: WT-3743 In lookaside sweep, check btree IDs are in range. (#3785)

---
 src/cache/cache_las.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/cache/cache_las.c b/src/cache/cache_las.c
index deed37517bb..35d9f43b172 100644
--- a/src/cache/cache_las.c
+++ b/src/cache/cache_las.c
@@ -849,7 +849,9 @@ __wt_las_sweep(WT_SESSION_IMPL *session)
 		 * reconciliation, we can safely remove entries from that point
 		 * on (for the given key) that are visible to all readers.
 		 */
-		if (__bit_test(cache->las_sweep_dropmap,
+		if (las_id >= cache->las_sweep_dropmin &&
+		    las_id <= cache->las_sweep_dropmax &&
+		    __bit_test(cache->las_sweep_dropmap,
 		    las_id - cache->las_sweep_dropmin)) {
 			WT_ERR(cursor->remove(cursor));
 			++remove_cnt;
-- 
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