From fac9aaa01ba3fbfef8196e86aa59158525393d11 Mon Sep 17 00:00:00 2001
From: Jasper Lievisse Adriaanse <j@jasper.la>
Date: Fri, 26 Feb 2021 15:21:20 +0100
Subject: [PATCH] [PATCH] Fix potential memory corruption with negative
 memmove() size

Gbp-Pq: Name 0005-CVE-2021-3520.patch
---
 lib/lz4.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/lz4.c b/lib/lz4.c
index 9f5e9bf..eac0541 100644
--- a/lib/lz4.c
+++ b/lib/lz4.c
@@ -1749,7 +1749,7 @@ LZ4_decompress_generic(
                  const size_t dictSize         /* note : = 0 if noDict */
                  )
 {
-    if (src == NULL) { return -1; }
+    if ((src == NULL) || (outputSize < 0)) { return -1; }
 
     {   const BYTE* ip = (const BYTE*) src;
         const BYTE* const iend = ip + srcSize;
-- 
2.30.2