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Another fix for handling invalid format 2 cmaps.

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Reported as

  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=8003

* src/sfnt/ttcmap.c (tt_cmap2_char_next): Adjust condition to avoid
an endless loop.
This commit is contained in:
Werner Lemberg 2018-04-26 09:04:39 +02:00
parent 2157d8fa6f
commit ac97a29653
2 changed files with 14 additions and 1 deletions
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13
ChangeLog
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@ -1,3 +1,16 @@
2018-04-26 Werner Lemberg <wl@gnu.org>
Another fix for handling invalid format 2 cmaps.
Sigh.
Reported as
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=8003
* src/sfnt/ttcmap.c (tt_cmap2_char_next): Adjust condition to avoid
an endless loop.
2018-04-24 Ben Wagner <bungeman@google.com>
[base] Avoid undefined behaviour in lcd filtering code (#53727).

2
src/sfnt/ttcmap.c
View File

@ -518,7 +518,7 @@
FT_UInt pos, idx;
if ( char_lo > start + count && charcode <= 0xFF )
if ( char_lo >= start + count && charcode <= 0xFF )
{
/* this happens only for a malformed cmap */
charcode = 0x100;