From: Jasper Lievisse Adriaanse <j@jasper.la>
Date: Fri, 26 Feb 2021 14:21:20 +0000 (+0100)
Subject: [PATCH] Fix potential memory corruption with negative memmove() size
X-Git-Tag: archive/raspbian/1.9.4-2+rpi1~1^2^2~1
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=fac9aaa01ba3fbfef8196e86aa59158525393d11;p=lz4.git

[PATCH] Fix potential memory corruption with negative memmove() size


Gbp-Pq: Name 0005-CVE-2021-3520.patch
---

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;