Infinite loop in src/gzip/ftgzip.c

[Weiqi Gao <weiqigao networkusa net>]

Hi,

I ran into infinite loops with gziped fonts using freetype-2.1.3.tar.bz2
from http://dl.sourceforge.net/freetype/.

I was building GNOME 2.2.0 on a Red Hat 8.0/Intel system using GARNOME
0.21.0.  One other use on the GARNOME mailing list also experienced a
similar problem.

A patch is attached.

-- 
Weiqi Gao
weiqigao networkusa net

--- ftgzip.c.orig	2003-02-08 10:13:03.000000000 -0600
+++ ftgzip.c	2003-02-08 10:14:21.000000000 -0600
@@ -452,6 +452,9 @@
       FT_ULong   delta;
 
       delta = (FT_ULong)( zip->limit - zip->cursor );
+      if ( delta == 0 )
+        break;
+
       if ( delta >= count )
         delta = count;
 

2003-02-08  Weiqi Gao  <weiqigao networkusa net>

	* src/gzip/ftgzip.c: fixed infinite loop in ft_gzip_file_io.