From c49f66f2adf27af499cf7efacbad656bf30d671a Mon Sep 17 00:00:00 2001
From: Yann Collet <cyan@fb.com>
Date: Tue, 7 Nov 2017 11:29:28 -0800
Subject: ensure `pattern` is a 1-byte repetition

---
 lib/lz4hc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'lib/lz4hc.c')

diff --git a/lib/lz4hc.c b/lib/lz4hc.c
index 5882109d..93017f1f 100644
--- a/lib/lz4hc.c
+++ b/lib/lz4hc.c
@@ -268,7 +268,8 @@ LZ4_FORCE_INLINE int LZ4HC_InsertAndGetWiderMatch (
             if (nextOffset==1) {
                 /* may be a repeated pattern */
                 if (repeat == rep_untested) {
-                    if ((pattern & 0xFFFF) == (pattern >> 16)) {   /* is it enough ? */
+                    if ( ((pattern & 0xFFFF) == (pattern >> 16))
+                      &  ((pattern & 0xFF)   == (pattern >> 24)) ) {
                         repeat = rep_confirmed;
                         srcPatternLength = LZ4HC_countPattern(ip+4, iHighLimit, pattern) + 4;
                     } else {
-- 
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