[Git][freetype/freetype][master] * src/base/ftobjs.c (ft_open_face_internal): Properly guard `face_index`.

[Werner Lemberg (@wl)]

Werner Lemberg pushed to branch master at FreeType / FreeType

Commits:

• 22a0cccb
  by Werner Lemberg at 2022-03-19T06:40:17+01:00

  * src/base/ftobjs.c (ft_open_face_internal): Properly guard `face_index`.
  
  We must ensure that the cast to `FT_Int` doesn't change the sign.
  
  Fixes #1139.
  

1 changed file:

• src/base/ftobjs.c

Changes:

src/base/ftobjs.c

---

...	...	@@ -2527,6 +2527,15 @@
2527	2527	#endif
2528	2528
2529	2529
	2530	+ /* only use lower 31 bits together with sign bit */
	2531	+ if ( face_index > 0 )
	2532	+ face_index &= 0x7FFFFFFFL;
	2533	+ else
	2534	+ {
	2535	+ face_index &= 0x7FFFFFFFL;
	2536	+ face_index = -face_index;
	2537	+ }
	2538	+
2530	2539	#ifdef FT_DEBUG_LEVEL_TRACE
2531	2540	FT_TRACE3(( "FT_Open_Face: " ));
2532	2541	if ( face_index < 0 )

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