2 files changed, 35 insertions, 2 deletions

diff --git a/meta/recipes-support/lz4/files/CVE-2021-3520.patch b/meta/recipes-support/lz4/files/CVE-2021-3520.patch
new file mode 100644
index 0000000000..5ac8f6691f
--- /dev/null
+++ b/meta/recipes-support/lz4/files/CVE-2021-3520.patch
@@ -0,0 +1,27 @@
+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
+
+Upstream-Status: Backport
+https://github.com/lz4/lz4/commit/8301a21773ef61656225e264f4f06ae14462bca7#diff-7055e9cf14c488aea9837aaf9f528b58ee3c22988d7d0d81d172ec62d94a88a7
+CVE: CVE-2021-3520
+Signed-off-by: Armin Kuster <akuster@mvista.com>
+
+---
+ lib/lz4.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+Index: git/lib/lz4.c
+===================================================================
+--- git.orig/lib/lz4.c
++++ git/lib/lz4.c
+@@ -1665,7 +1665,7 @@ 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;
diff --git a/meta/recipes-support/lz4/lz4_1.9.2.bb b/meta/recipes-support/lz4/lz4_1.9.2.bb
index 455d2a5141..bc11a57eb5 100644
--- a/meta/recipes-support/lz4/lz4_1.9.2.bb
+++ b/meta/recipes-support/lz4/lz4_1.9.2.bb
@@ -1,5 +1,6 @@
 SUMMARY = "Extremely Fast Compression algorithm"
 DESCRIPTION = "LZ4 is a very fast lossless compression algorithm, providing compression speed at 400 MB/s per core, scalable with multi-cores CPU. It also features an extremely fast decoder, with speed in multiple GB/s per core, typically reaching RAM speed limits on multi-core systems."
+HOMEPAGE = "https://github.com/lz4/lz4"
 
 LICENSE = "BSD | BSD-2-Clause | GPL-2.0"
 LIC_FILES_CHKSUM = "file://lib/LICENSE;md5=ebc2ea4814a64de7708f1571904b32cc \
@@ -11,8 +12,13 @@ PE = "1"
 
 SRCREV = "fdf2ef5809ca875c454510610764d9125ef2ebbd"
 
-SRC_URI = "git://github.com/lz4/lz4.git;branch=dev \
+# remove at next version upgrade or when output changes
+PR = "r1"
+HASHEQUIV_HASH_VERSION .= ".1"
+
+SRC_URI = "git://github.com/lz4/lz4.git;branch=dev;protocol=https \
            file://run-ptest \
+           file://CVE-2021-3520.patch \
            "
 UPSTREAM_CHECK_GITTAGREGEX = "v(?P<pver>.*)"
 
@@ -21,7 +27,7 @@ S = "${WORKDIR}/git"
 # Fixed in r118, which is larger than the current version.
 CVE_CHECK_WHITELIST += "CVE-2014-4715"
 
-EXTRA_OEMAKE = "PREFIX=${prefix} CC='${CC}' DESTDIR=${D} LIBDIR=${libdir} INCLUDEDIR=${includedir} BUILD_STATIC=no"
+EXTRA_OEMAKE = "PREFIX=${prefix} CC='${CC}' CFLAGS='${CFLAGS}' DESTDIR=${D} LIBDIR=${libdir} INCLUDEDIR=${includedir} BUILD_STATIC=no"
 
 do_install() {
         oe_runmake install