Avoid invalid face index

Resolves: #2079271

freetype-2.10.4-avoid-invalid-face-index.patch

@@ -0,0 +1,43 @@
+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.
+---
+ 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 )
+-- 
+2.35.1
+

freetype.spec

@@ -4,7 +4,7 @@
 Summary: A free and portable font rendering engine
 Name: freetype
 Version: 2.10.4
-Release: 6%{?dist}
+Release: 7%{?dist}
 License: (FTL or GPLv2+) and BSD and MIT and Public Domain and zlib with acknowledgement
 URL: http://www.freetype.org
 Source:  http://download.savannah.gnu.org/releases/freetype/freetype-%{version}.tar.xz
@@ -32,6 +32,9 @@ Patch7:  freetype-2.10.4-png-memory-leak.patch
 # https://bugzilla.redhat.com/show_bug.cgi?id=1964066
 Patch8:  freetype-2.10.4-covscan.patch
 
+# https://bugzilla.redhat.com/show_bug.cgi?id=2077989
+Patch9:  freetype-2.10.4-avoid-invalid-face-index.patch
+
 BuildRequires:  gcc
 BuildRequires: libX11-devel
 BuildRequires: libpng-devel
@@ -96,6 +99,7 @@ popd
 %patch6 -p1 -b .debughook
 %patch7 -p1 -b .png-memory-leak
 %patch8 -p1 -b .covscan
+%patch9 -p1 -b .avoid-invalid-face-index
 
 %build
 
@@ -237,6 +241,10 @@ rm -f $RPM_BUILD_ROOT%{_libdir}/*.{a,la}
 %{_mandir}/man1/*
 
 %changelog
+* Thu May 26 2022 Marek Kasik <mkasik@redhat.com> - 2.10.4-7
+- Avoid invalid face index
+- Resolves: #2079271
+
 * Mon Aug 09 2021 Mohan Boddu <mboddu@redhat.com> - 2.10.4-6
 - Rebuilt for IMA sigs, glibc 2.34, aarch64 flags
   Related: rhbz#1991688