From 22a0cccb4d9d002f33c1ba7a4b36812c7d4f46b5 Mon Sep 17 00:00:00 2001

From: Werner Lemberg <wl@gnu.org>

Date: Sat, 19 Mar 2022 06:40:17 +0100

Subject: [PATCH] * src/base/ftobjs.c (ft_open_face_internal): Properly guard

 `face_index`.

We must ensure that the cast to `FT_Int` doesn't change the sign.

Fixes #1139.

---

 src/base/ftobjs.c | 9 +++++++++

 1 file changed, 9 insertions(+)

From d014387ad4a5dd04d8e7f99587c7dacb70261924 Mon Sep 17 00:00:00 2001

From: Werner Lemberg <wl@gnu.org>

Date: Sat, 19 Mar 2022 09:30:45 +0100

Subject: [PATCH 2/2] * src/base/ftobjs.c (ft_open_face_internal): Thinko.

---

 src/base/ftobjs.c | 1 +

 1 file changed, 1 insertion(+)

diff --git a/src/base/ftobjs.c b/src/base/ftobjs.c

index 2c0f0e6c9..10952a6c6 100644

--- a/src/base/ftobjs.c

+++ b/src/base/ftobjs.c

@@ -2527,6 +2527,16 @@

 #endif

+    /* only use lower 31 bits together with sign bit */

+    if ( face_index > 0 )

+      face_index &= 0x7FFFFFFFL;

+    else

+    {

+      face_index  = -face_index;

+      face_index &= 0x7FFFFFFFL;

+      face_index  = -face_index;

+    }

+

 #ifdef FT_DEBUG_LEVEL_TRACE

     FT_TRACE3(( "FT_Open_Face: " ));

     if ( face_index < 0 )

-- 

2.35.1