shithub: freetype+ttf2subf

Download patch

ref: 5b86f53dd60c7545dcea75684561199ac3d3e90f
parent: cc288e383bbb95442f3ed72539917323bd1dabbf
author: Werner Lemberg <[email protected]>
date: Tue Nov 6 06:08:41 EST 2018 

[psaux] Fix timeout in old CFF engine.

Reported as

  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=11260

* src/psaux/cffdecode.c (cff_decoder_parse_charstrings)
<cff_op_sqrt> [CFF_CONFIG_OPTION_OLD_ENGINE]: Fix potential endless
loop.

git/fs: mount .git/fs: mount/attach disallowed 
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,15 @@
+2018-11-06  Werner Lemberg  <[email protected]>
+
+	[psaux] Fix timeout in old CFF engine.
+
+	Reported as
+
+	  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=11260
+
+	* src/psaux/cffdecode.c (cff_decoder_parse_charstrings)
+	<cff_op_sqrt> [CFF_CONFIG_OPTION_OLD_ENGINE]: Fix potential endless
+	loop.
+
 2018-11-04  Alexei Podtelezhnikov  <[email protected]>
 
 	* src/truetype/ttgxvar.c: Use enum definitions.
--- a/src/psaux/cffdecode.c
+++ b/src/psaux/cffdecode.c
@@ -1748,7 +1748,10 @@
         case cff_op_sqrt:
           FT_TRACE4(( " sqrt\n" ));
 
-          if ( args[0] > 0 )
+          /* without upper limit the loop below might not finish */
+          if ( args[0] > 0x7FFFFFFFL )
+            args[0] = 46341;
+          else if ( args[0] > 0 )
           {
             FT_Fixed  root = args[0];
             FT_Fixed  new_root;