[psaux] Fix numeric overflow.
Reported as
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=10768
* src/psaux/cffdecode.c (cff_decoder_parse_charstrings) <cff_op_roll>
[CFF_CONFIG_OPTION_OLD_ENGINE]: Use NEG_INT.
diff --git a/ChangeLog b/ChangeLog
index 8a308a6..123cc51 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,16 @@
2018-10-02 Werner Lemberg <wl@gnu.org>
+ [psaux] Fix numeric overflow.
+
+ Reported as
+
+ https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=10768
+
+ * src/psaux/cffdecode.c (cff_decoder_parse_charstrings) <cff_op_roll>
+ [CFF_CONFIG_OPTION_OLD_ENGINE]: Use NEG_INT.
+
+2018-10-02 Werner Lemberg <wl@gnu.org>
+
[pshinter] Handle numeric overflow.
Reported as
diff --git a/src/psaux/cffdecode.c b/src/psaux/cffdecode.c
index 0576ca6..b90a828 100644
--- a/src/psaux/cffdecode.c
+++ b/src/psaux/cffdecode.c
@@ -1839,7 +1839,7 @@
/* before C99 it is implementation-defined whether */
/* the result of `%' is negative if the first operand */
/* is negative */
- idx = -( ( -idx ) % count );
+ idx = -( NEG_INT( idx ) % count );
while ( idx < 0 )
{
FT_Fixed tmp = args[0];
