freetype: backport patch for CVE-2022-27404

CVE: CVE-2022-27404

Upstream issue:
https://gitlab.freedesktop.org/freetype/freetype/-/issues/1138

(From OE-Core rev: af45711f0ab36a1b63fa338755f9a51b227393d1)

Signed-off-by: Davide Gardenal <davide.gardenal@huawei.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 51 insertions, 1 deletions

diff --git a/meta/recipes-graphics/freetype/freetype/CVE-2022-27404.patch b/meta/recipes-graphics/freetype/freetype/CVE-2022-27404.patch
new file mode 100644
index 0000000000..3335fbda06
--- /dev/null
+++ b/meta/recipes-graphics/freetype/freetype/CVE-2022-27404.patch
@@ -0,0 +1,48 @@
+From 53dfdcd8198d2b3201a23c4bad9190519ba918db Mon Sep 17 00:00:00 2001
+From: Werner Lemberg <wl@gnu.org>
+Date: Thu, 17 Mar 2022 19:24:16 +0100
+Subject: [PATCH] [sfnt] Avoid invalid face index.
+
+Fixes #1138.
+
+* src/sfnt/sfobjs.c (sfnt_init_face), src/sfnt/sfwoff2.c (woff2_open_font):
+Check `face_index` before decrementing.
+
+Upstream-Status: Backport
+https://gitlab.freedesktop.org/freetype/freetype/-/commit/53dfdcd8198d2b3201a23c4bad9190519ba918db
+
+Signed-off-by: Davide Gardenal <davide.gardenal@huawei.com>
+---
+ src/sfnt/sfobjs.c  | 2 +-
+ src/sfnt/sfwoff2.c | 2 +-
+ 2 files changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/src/sfnt/sfobjs.c b/src/sfnt/sfobjs.c
+index f9d4d3858..9771c35df 100644
+--- a/src/sfnt/sfobjs.c
++++ b/src/sfnt/sfobjs.c
+@@ -566,7 +566,7 @@
+     face_index = FT_ABS( face_instance_index ) & 0xFFFF;
+ 
+     /* value -(N+1) requests information on index N */
+-    if ( face_instance_index < 0 )
++    if ( face_instance_index < 0 && face_index > 0 )
+       face_index--;
+ 
+     if ( face_index >= face->ttc_header.count )
+diff --git a/src/sfnt/sfwoff2.c b/src/sfnt/sfwoff2.c
+index cb1e0664a..165b875e5 100644
+--- a/src/sfnt/sfwoff2.c
++++ b/src/sfnt/sfwoff2.c
+@@ -2085,7 +2085,7 @@
+     /* Validate requested face index. */
+     *num_faces = woff2.num_fonts;
+     /* value -(N+1) requests information on index N */
+-    if ( *face_instance_index < 0 )
++    if ( *face_instance_index < 0 && face_index > 0 )
+       face_index--;
+ 
+     if ( face_index >= woff2.num_fonts )
+-- 
+GitLab
+
diff --git a/meta/recipes-graphics/freetype/freetype_2.11.1.bb b/meta/recipes-graphics/freetype/freetype_2.11.1.bb
index 5055ff185c..257c5c6d9a 100644
--- a/meta/recipes-graphics/freetype/freetype_2.11.1.bb
+++ b/meta/recipes-graphics/freetype/freetype_2.11.1.bb
@@ -12,7 +12,9 @@ LIC_FILES_CHKSUM = "file://LICENSE.TXT;md5=a5927784d823d443c6cae55701d01553 \
                     file://docs/FTL.TXT;md5=9f37b4e6afa3fef9dba8932b16bd3f97 \
                     file://docs/GPLv2.TXT;md5=8ef380476f642c20ebf40fecb0add2ec"
 
-SRC_URI = "${SAVANNAH_NONGNU_MIRROR}/${BPN}/${BP}.tar.xz"
+SRC_URI = "${SAVANNAH_NONGNU_MIRROR}/${BPN}/${BP}.tar.xz \ 
+           file://CVE-2022-27404.patch \
+           "
 SRC_URI[sha256sum] = "3333ae7cfda88429c97a7ae63b7d01ab398076c3b67182e960e5684050f2c5c8"
 
 UPSTREAM_CHECK_REGEX = "freetype-(?P<pver>\d+(\.\d+)+)"