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[freetype2] master 38ecc94: Another fix for handling invalid format 2 cm
From: |
Werner LEMBERG |
Subject: |
[freetype2] master 38ecc94: Another fix for handling invalid format 2 cmaps. |
Date: |
Sun, 22 Apr 2018 04:14:32 -0400 (EDT) |
branch: master
commit 38ecc949ce1bfe4ceb567df7d8c7daf1d620fd3a
Author: Werner Lemberg <address@hidden>
Commit: Werner Lemberg <address@hidden>
Another fix for handling invalid format 2 cmaps.
The previous commit was incomplete.
Reported as
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=7928
* src/sfnt/ttcmap.c (tt_cmap2_char_next): Adjust condition to avoid
an endless loop.
---
ChangeLog | 15 ++++++++++++++-
src/sfnt/ttcmap.c | 2 +-
2 files changed, 15 insertions(+), 2 deletions(-)
diff --git a/ChangeLog b/ChangeLog
index 57c617e..4dc8c55 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,16 @@
+2018-04-22 Werner Lemberg <address@hidden>
+
+ Another fix for handling invalid format 2 cmaps.
+
+ The previous commit was incomplete.
+
+ Reported as
+
+ https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=7928
+
+ * src/sfnt/ttcmap.c (tt_cmap2_char_next): Adjust condition to avoid
+ an endless loop.
+
2018-04-19 Werner Lemberg <address@hidden
[autofit] Add support for Georgian Mtavruli characters.
@@ -9,7 +22,7 @@
* src/autofit/afscript.h: Add Mtavruli standard character.
-2018-03-13 Werner Lemberg <address@hidden>
+2018-04-18 Werner Lemberg <address@hidden>
Fix handling of invalid format 2 cmaps.
diff --git a/src/sfnt/ttcmap.c b/src/sfnt/ttcmap.c
index 71a3c1e..07075cb 100644
--- a/src/sfnt/ttcmap.c
+++ b/src/sfnt/ttcmap.c
@@ -518,7 +518,7 @@
FT_UInt pos, idx;
- if ( char_lo > start + count )
+ if ( char_lo > start + count && charcode <= 0xFF )
{
/* this happens only for a malformed cmap */
charcode = 0x100;
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