From b2079cb508a1944841abf39715d8a2d522452467 Mon Sep 17 00:00:00 2001
From: antirez <antirez@gmail.com>
Date: Wed, 31 Jul 2019 10:36:23 +0200
Subject: [PATCH] HyperLogLog: fix the fix of a corruption bug.

---
 src/hyperloglog.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/hyperloglog.c b/src/hyperloglog.c
index e0557f985..5d4afaa25 100644
--- a/src/hyperloglog.c
+++ b/src/hyperloglog.c
@@ -700,8 +700,7 @@ int hllSparseSet(robj *o, long index, uint8_t count) {
         p += oplen;
         first += span;
     }
-    if (span == 0) return -1; /* Invalid format. */
-    if (span >= end) return -1; /* Invalid format. */
+    if (span == 0 || p >= end) return -1; /* Invalid format. */
 
     next = HLL_SPARSE_IS_XZERO(p) ? p+2 : p+1;
     if (next >= end) next = NULL;