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* src/base/ftglyph.c (FT_Get_Glyph): Check `slot->advance'.

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Werner Lemberg 2017-06-01 17:00:37 +02:00
parent 4a1f1a6d2a
commit 0ad3262366
2 changed files with 17 additions and 0 deletions
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4
ChangeLog
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@ -1,3 +1,7 @@
2017-06-01 Werner Lemberg <wl@gnu.org>
* src/base/ftglyph.c (FT_Get_Glyph): Check `slot->advance'.
2017-06-01 Werner Lemberg <wl@gnu.org>
[psaux] 32bit integer overflow tun-time errors (#46149).

13
src/base/ftglyph.c
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@ -408,6 +408,19 @@
goto Exit;
/* copy advance while converting 26.6 to 16.16 format */
if ( slot->advance.x >= 0x8000L * 64 ||
slot->advance.x <= -0x8000L * 64 )
{
FT_ERROR(( "FT_Get_Glyph: advance width too large\n" ));
return FT_THROW( Invalid_Argument );
}
if ( slot->advance.y >= 0x8000L * 64 ||
slot->advance.y <= -0x8000L * 64 )
{
FT_ERROR(( "FT_Get_Glyph: advance height too large\n" ));
return FT_THROW( Invalid_Argument );
}
glyph->advance.x = slot->advance.x * 1024;
glyph->advance.y = slot->advance.y * 1024;