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[cff] Improve stack overflow test.

* src/cff/cffgload.c (cff_decoder_parse_charstrings): Check stack
after execution of operations too.

git/fs: mount .git/fs: mount/attach disallowed

--- a/ChangeLog

+++ b/ChangeLog

@@ -1,3 +1,10 @@

+2010-08-04  Suzuki, Toshiya (鈴木俊哉) <[email protected]>

+

+	[cff] Improve stack overflow test.

+

+	* src/cff/cffgload.c (cff_decoder_parse_charstrings): Check stack

+	after execution of operations too.

+

 2010-07-18  Werner Lemberg  <[email protected]>

 	Add reference counters and to FT_Library and FT_Face objects.

--- a/src/cff/cffgload.c

+++ b/src/cff/cffgload.c

@@ -2455,7 +2455,10 @@

           return CFF_Err_Unimplemented_Feature;

         }

-      decoder->top = args;

+        decoder->top = args;

+

+        if ( decoder->top - stack >= CFF_MAX_OPERANDS )

+          goto Stack_Overflow;

       } /* general operator processing */