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-rw-r--r--meta/recipes-support/lz4/files/CVE-2021-3520.patch27
-rw-r--r--meta/recipes-support/lz4/lz4_1.9.3.bb3
2 files changed, 29 insertions, 1 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 00000000000..5ac8f6691fa
--- /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_1.9.3.bb b/meta/recipes-support/lz4/lz4_1.9.3.bb
index effc530b947..15867023c37 100644
--- a/meta/recipes-support/lz4/lz4_1.9.3.bb
+++ b/meta/recipes-support/lz4/lz4_1.9.3.bb
@@ -12,8 +12,9 @@ PE = "1"
SRCREV = "d44371841a2f1728a3f36839fd4b7e872d0927d3"
-SRC_URI = "git://github.com/lz4/lz4.git;branch=release \
+SRC_URI = "git://github.com/lz4/lz4.git;branch=release;protocol=https \
file://run-ptest \
+ file://CVE-2021-3520.patch \
"
UPSTREAM_CHECK_GITTAGREGEX = "v(?P<pver>.*)"