[freetype2] master 4dc0d48: [psaux] Avoid slow PS font parsing in case of error.

[Werner LEMBERG]

branch: master
commit 4dc0d48f7bf939f893bc203239600fc56c63e39c
Author: Werner Lemberg <address@hidden>
Commit: Werner Lemberg <address@hidden>

    [psaux] Avoid slow PS font parsing in case of error.
    
    Reported as
    
      https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=9955
    
    * src/psaux/psobjs.c (ps_parser_to_bytes): Set `parser->cursor' even
    in case of error to avoid potential re-scanning.
---
 ChangeLog          | 13 ++++++++++++-
 src/psaux/psobjs.c |  6 +++---
 2 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 4e30cdc..7b7c7cf 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,15 @@
-2018-08-14  Werner Lemberg  <address@hidden>
+2018-08-18  Werner Lemberg  <address@hidden>
+
+       [psaux] Avoid slow PS font parsing in case of error.
+
+       Reported as
+
+         https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=9955
+
+       * src/psaux/psobjs.c (ps_parser_to_bytes): Set `parser->cursor' even
+       in case of error to avoid potential re-scanning.
+
+2018-08-18  Werner Lemberg  <address@hidden>
 
        [cff] Fix heap buffer overflow in old engine.
 
diff --git a/src/psaux/psobjs.c b/src/psaux/psobjs.c
index 97c9cb1..906c008 100644
--- a/src/psaux/psobjs.c
+++ b/src/psaux/psobjs.c
@@ -1447,6 +1447,8 @@
                                           bytes,
                                           max_bytes );
 
+    parser->cursor = cur;
+
     if ( delimiters )
     {
       if ( cur < parser->limit && *cur != '>' )
@@ -1456,11 +1458,9 @@
         goto Exit;
       }
 
-      cur++;
+      parser->cursor++;
     }
 
-    parser->cursor = cur;
-
   Exit:
     return error;
   }