[truetype] Mask numeric overflows.
* src/truetype/ttinterp.c (Move_CVT, Move_CVT_Stretched, Ins_MIRP):
Mask numeric overflows.
Reported as
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=11681
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=11734
diff --git a/ChangeLog b/ChangeLog
index cb17e77..40564a3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,17 @@
2019-02-21 Armin Hasitzka <prince.cherusker@gmail.com>
+ [truetype] Mask numeric overflows.
+
+ * src/truetype/ttinterp.c (Move_CVT, Move_CVT_Stretched, Ins_MIRP):
+ Mask numeric overflows.
+
+ Reported as
+
+ https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=11681
+ https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=11734
+
+2019-02-21 Armin Hasitzka <prince.cherusker@gmail.com>
+
[psaux] Mask numeric overflow.
* src/psaux/cffdecode.c (cff_decoder_parse_charstrings): Mask numeric
diff --git a/src/truetype/ttinterp.c b/src/truetype/ttinterp.c
index fc8615b..90676b8 100644
--- a/src/truetype/ttinterp.c
+++ b/src/truetype/ttinterp.c
@@ -1564,7 +1564,7 @@
FT_ULong idx,
FT_F26Dot6 value )
{
- exc->cvt[idx] += value;
+ exc->cvt[idx] = ADD_LONG( exc->cvt[idx], value );
}
@@ -1573,7 +1573,8 @@
FT_ULong idx,
FT_F26Dot6 value )
{
- exc->cvt[idx] += FT_DivFix( value, Current_Ratio( exc ) );
+ exc->cvt[idx] = ADD_LONG( exc->cvt[idx],
+ FT_DivFix( value, Current_Ratio( exc ) );
}
@@ -6311,7 +6312,7 @@
if ( exc->GS.auto_flip )
{
if ( ( org_dist ^ cvt_dist ) < 0 )
- cvt_dist = -cvt_dist;
+ cvt_dist = NEG_LONG( cvt_dist );
}
#ifdef TT_SUPPORT_SUBPIXEL_HINTING_INFINALITY
