From 8301a21773ef61656225e264f4f06ae14462bca7 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] Fix potential memory corruption with negative memmove() size

---

 lib/lz4.c | 2 +-

 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/lz4.c b/lib/lz4.c

index 5f524d01..c2f504ef 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;