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Try to fix Savannah bug #30717 (and probably #30719 too).

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* src/smooth/ftsmooth.c (ft_smooth_render_generic): Add another
overflow test for `width' and `height'.
This commit is contained in:
Werner Lemberg 2010-08-10 02:59:12 +02:00
parent e563216ddd
commit a205b3ca85
2 changed files with 28 additions and 3 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2010-08-10 Werner Lemberg <wl@gnu.org>
Try to fix Savannah bug #30717 (and probably #30719 too).
* src/smooth/ftsmooth.c (ft_smooth_render_generic): Add another
overflow test for `width' and `height'.
2010-08-06 Werner Lemberg <wl@gnu.org>
* Version 2.4.2 released.

24
src/smooth/ftsmooth.c
View File

@ -140,8 +140,26 @@
cbox.xMax = FT_PIX_CEIL( cbox.xMax );
cbox.yMax = FT_PIX_CEIL( cbox.yMax );
width = (FT_UInt)( ( cbox.xMax - cbox.xMin ) >> 6 );
height = (FT_UInt)( ( cbox.yMax - cbox.yMin ) >> 6 );
if ( cbox.xMin < 0 && cbox.xMax > FT_INT_MAX + cbox.xMin )
{
FT_ERROR(( "ft_smooth_render_generic: glyph too large:"
" xMin = %d, xMax = %d\n",
cbox.xMin >> 6, cbox.xMax >> 6 ));
return Smooth_Err_Raster_Overflow;
}
else
width = (FT_UInt)( ( cbox.xMax - cbox.xMin ) >> 6 );
if ( cbox.yMin < 0 && cbox.yMax > FT_INT_MAX + cbox.yMin )
{
FT_ERROR(( "ft_smooth_render_generic: glyph too large:"
" yMin = %d, yMax = %d\n",
cbox.yMin >> 6, cbox.yMax >> 6 ));
return Smooth_Err_Raster_Overflow;
}
else
height = (FT_UInt)( ( cbox.yMax - cbox.yMin ) >> 6 );
bitmap = &slot->bitmap;
memory = render->root.memory;
@ -202,7 +220,7 @@
/* but we care realistic cases only. Always pitch <= width. */
if ( width > 0x7FFFU || height > 0x7FFFU )
{
FT_ERROR(( "ft_smooth_render_generic: glyph too large: %d x %d\n",
FT_ERROR(( "ft_smooth_render_generic: glyph too large: %u x %u\n",
width, height ));
return Smooth_Err_Raster_Overflow;
}