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* src/winfonts/winfnt.c (fnt_face_get_dll_font): Exit in case of 

invalid font.
(FNT_Load_Glyph): Protect against invalid bitmap width.
This commit is contained in:
Werner Lemberg 2007-06-17 11:27:17 +00:00
parent e12ed563d6
commit be183ebb5d
2 changed files with 14 additions and 0 deletions
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4
ChangeLog
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@ -5,6 +5,10 @@
(main): Handle new option `--size' to set `font_size'.
(Usage): Updated.
* src/winfonts/winfnt.c (fnt_face_get_dll_font): Exit in case of
invalid font.
(FNT_Load_Glyph): Protect against invalid bitmap width.
2006-06-16 David Turner <david@freetype.org>
* src/smooth/ftgrays.c (gray_find_cell, gray_set_cell, gray_hline):

10
src/winfonts/winfnt.c
View File

@ -536,8 +536,11 @@
error = fnt_font_load( face->font, stream );
if ( error )
{
FT_TRACE2(( "font #%lu load error %d\n",
dir_entry2.name, error ));
goto Fail;
}
else
FT_TRACE2(( "font #%lu successfully loaded\n",
dir_entry2.name ));
@ -968,6 +971,13 @@
bitmap->rows = font->header.pixel_height;
bitmap->pixel_mode = FT_PIXEL_MODE_MONO;
if ( offset + pitch * bitmap->rows >= font->header.file_size )
{
FT_TRACE2(( "invalid bitmap width\n" ));
error = FNT_Err_Invalid_File_Format;
goto Exit;
}
/* note: since glyphs are stored in columns and not in rows we */
/* can't use ft_glyphslot_set_bitmap */
if ( FT_ALLOC_MULT( bitmap->buffer, pitch, bitmap->rows ) )