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[freetype2] master 182295cbc 2/2: [pfr] Add some safety guards.
From: |
Werner Lemberg |
Subject: |
[freetype2] master 182295cbc 2/2: [pfr] Add some safety guards. |
Date: |
Tue, 26 Jul 2022 10:50:51 -0400 (EDT) |
branch: master
commit 182295cbcf63e0399f5df68f3d8a7e60b8eeecdb
Author: Werner Lemberg <wl@gnu.org>
Commit: Werner Lemberg <wl@gnu.org>
[pfr] Add some safety guards.
* src/pfr/pfrload.c (pfr_phy_font_load): Check resolutions and number of
characters.
Fixes #1174.
---
src/pfr/pfrload.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/src/pfr/pfrload.c b/src/pfr/pfrload.c
index 25ba07749..97290ef02 100644
--- a/src/pfr/pfrload.c
+++ b/src/pfr/pfrload.c
@@ -852,6 +852,14 @@
phy_font->bbox.yMax = PFR_NEXT_SHORT( p );
phy_font->flags = flags = PFR_NEXT_BYTE( p );
+ if ( !phy_font->outline_resolution ||
+ !phy_font->metrics_resolution )
+ {
+ error = FT_THROW( Invalid_Table );
+ FT_ERROR(( "pfr_phy_font_load: invalid resolution\n" ));
+ goto Fail;
+ }
+
/* get the standard advance for non-proportional fonts */
if ( !( flags & PFR_PHY_PROPORTIONAL ) )
{
@@ -969,6 +977,13 @@
phy_font->num_chars = count = PFR_NEXT_USHORT( p );
phy_font->chars_offset = offset + (FT_Offset)( p - stream->cursor );
+ if ( !phy_font->num_chars )
+ {
+ error = FT_THROW( Invalid_Table );
+ FT_ERROR(( "pfr_phy_font_load: no glyphs\n" ));
+ goto Fail;
+ }
+
Size = 1 + 1 + 2;
if ( flags & PFR_PHY_2BYTE_CHARCODE )
Size += 1;
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Werner Lemberg <=