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package/lz4: add upstream security fix for CVE-2021-3520

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Fixes a potential memory corruption with negative memmove() size.  For
details, see (NVD not yet updated):

https://security-tracker.debian.org/tracker/CVE-2021-3520

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
This commit is contained in:
Peter Korsgaard 2021-05-23 11:52:39 +02:00 committed by Yann E. MORIN
parent d642381049
commit ecb55c43ce
2 changed files with 29 additions and 0 deletions
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26
package/lz4/0001-Fix-potential-memory-corruption-with-negative-memmov.patch Normal file
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@ -0,0 +1,26 @@
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
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
---
lib/lz4.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/lib/lz4.c b/lib/lz4.c
index 5f524d0..c2f504e 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;
--
2.20.1

3
package/lz4/lz4.mk
View File

@ -17,6 +17,9 @@ LZ4_CPE_ID_VENDOR = yann_collet
# See https://github.com/lz4/lz4/issues/818
LZ4_IGNORE_CVES += CVE-2014-4715
# 0001-Fix-potential-memory-corruption-with-negative-memmov.patch
LZ4_IGNORE_CVES += CVE-2021-3520
ifeq ($(BR2_STATIC_LIBS),y)
LZ4_MAKE_OPTS += BUILD_SHARED=no
else ifeq ($(BR2_SHARED_LIBS),y)