From 9429e20de3885c0e0d9beac23f703fce58461021 Mon Sep 17 00:00:00 2001
From: Szabolcs Berecz <[email protected]>
Date: Sun, 25 Oct 2015 22:43:25 +0100
Subject: [PATCH] Fix invalid read outsize allocated memory

The invalid read happens when compressing a 1 byte file.
---
 src/zopfli/hash.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/zopfli/hash.c b/src/zopfli/hash.c
index a3b294fa..66528aa5 100644
--- a/src/zopfli/hash.c
+++ b/src/zopfli/hash.c
@@ -129,7 +129,6 @@ void ZopfliUpdateHash(const unsigned char* array, size_t pos, size_t end,
 
 void ZopfliWarmupHash(const unsigned char* array, size_t pos, size_t end,
                 ZopfliHash* h) {
-  (void)end;
   UpdateHashValue(h, array[pos + 0]);
-  UpdateHashValue(h, array[pos + 1]);
+  if (pos + 1 < end) UpdateHashValue(h, array[pos + 1]);
 }