tree 7e9a9b8c4f402de11e2e27c0f9a60a3b0a744e50
parent e7b013044e18d7942af9d529a83d7fbb2d1da756
author Werner Lemberg <wl@gnu.org> 1491212253 +0200
committer Werner Lemberg <wl@gnu.org> 1491212253 +0200

[truetype] Avoid reexecution of `fpgm' and `prep' in case of error.

Reported as

  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=981

* include/freetype/fterrdef.h (FT_Err_DEF_In_Glyf_Bytecode): New
error code.

* src/truetype/ttinterp.c (Ins_FDEF, Ins_IDEF): Prohibit execution
of these two opcodes in `glyf' bytecode.
(TT_RunIns): Don't enforce reexecution of `fpgm' and `prep' bytecode
in case of error since function tables can no longer be modified
(due to the changes in `Ins_FDEF' and `Ins_IDEF').  This change can
enormously speed up handling of broken fonts.