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47 lines
1.2 KiB
47 lines
1.2 KiB
From 22a0cccb4d9d002f33c1ba7a4b36812c7d4f46b5 Mon Sep 17 00:00:00 2001
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From: Werner Lemberg <wl@gnu.org>
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Date: Sat, 19 Mar 2022 06:40:17 +0100
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Subject: [PATCH] * src/base/ftobjs.c (ft_open_face_internal): Properly guard
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`face_index`.
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We must ensure that the cast to `FT_Int` doesn't change the sign.
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Fixes #1139.
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---
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src/base/ftobjs.c | 9 +++++++++
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1 file changed, 9 insertions(+)
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From d014387ad4a5dd04d8e7f99587c7dacb70261924 Mon Sep 17 00:00:00 2001
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From: Werner Lemberg <wl@gnu.org>
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Date: Sat, 19 Mar 2022 09:30:45 +0100
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Subject: [PATCH 2/2] * src/base/ftobjs.c (ft_open_face_internal): Thinko.
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---
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src/base/ftobjs.c | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/src/base/ftobjs.c b/src/base/ftobjs.c
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index 2c0f0e6c9..10952a6c6 100644
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--- a/src/base/ftobjs.c
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+++ b/src/base/ftobjs.c
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@@ -2527,6 +2527,16 @@
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#endif
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+ /* only use lower 31 bits together with sign bit */
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+ if ( face_index > 0 )
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+ face_index &= 0x7FFFFFFFL;
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+ else
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+ {
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+ face_index = -face_index;
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+ face_index &= 0x7FFFFFFFL;
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+ face_index = -face_index;
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+ }
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+
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#ifdef FT_DEBUG_LEVEL_TRACE
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FT_TRACE3(( "FT_Open_Face: " ));
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if ( face_index < 0 )
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--
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2.35.1
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