From ab713923a24d52a6c3d0835627b3f0d715955467 Mon Sep 17 00:00:00 2001
From: BellaXlp <2273816832@qq.com>
Date: Thu, 13 Aug 2020 05:42:10 +0800
Subject: fix issue #783 (#862)

* fix issue #783
---
 lib/lz4.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'lib/lz4.c')

diff --git a/lib/lz4.c b/lib/lz4.c
index 1cd7322..162a36a 100644
--- a/lib/lz4.c
+++ b/lib/lz4.c
@@ -1931,7 +1931,7 @@ LZ4_decompress_generic(
                     /* If we're in this block because of the input parsing condition, then we must be on the
                      * last sequence (or invalid), so we must check that we exactly consume the input.
                      */
-                    if ((ip+length>iend-(2+1+LASTLITERALS)) && (ip+length != iend)) { goto _output_error; }
+                    if ((ip+length>iend-(2+1+LASTLITERALS)) && (ip+length != iend) && (cpy != oend)) { goto _output_error; }
                     assert(ip+length <= iend);
                     /* We are finishing in the middle of a literals segment.
                      * Break after the copy.
-- 
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