From 0df22ef9f66dcfc922d22b7639593336f91b9a5f Mon Sep 17 00:00:00 2001
From: John Sully <john@csquare.ca>
Date: Mon, 29 Jul 2019 18:08:45 -0400
Subject: [PATCH] Fix HLL corruption

Former-commit-id: 47ef9e5cbd11dad107a68a94dfb51d192e86c84e
---
 src/hyperloglog.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/hyperloglog.cpp b/src/hyperloglog.cpp
index 344fd219f..0b1239965 100644
--- a/src/hyperloglog.cpp
+++ b/src/hyperloglog.cpp
@@ -710,6 +710,7 @@ int hllSparseSet(robj *o, long index, uint8_t count) {
         first += span;
     }
     if (span == 0) return -1; /* Invalid format. */
+    if (p >= end) return -1; /* Invalid format. */
 
     next = HLL_SPARSE_IS_XZERO(p) ? p+2 : p+1;
     if (next >= end) next = NULL;