2007-12-14 Lutz Mueller <lutz@users.sourceforge.net>

	Bug pointed out by Meder Kydyraliev, Google Security Team:

	* libexif/exif-loader.c: (exif_loader_write) Ignore buffers of
	zero length.

ChangeLog

@@ -1,3 +1,10 @@
+2007-12-14  Lutz Mueller <lutz@users.sourceforge.net>
+
+	Bug pointed out by Meder Kydyraliev, Google Security Team:
+
+	* libexif/exif-loader.c: (exif_loader_write) Ignore buffers of
+	zero length.
+
 2007-12-07  Jan Patera <patera@users.sourceforge.net>
 
 	* Added support for Fuji makernotes

libexif/exif-loader.c

@@ -176,6 +176,8 @@ exif_loader_write (ExifLoader *eld, unsigned char *buf, unsigned int len)
 		break;
 	}
 
+	if (!len)
+		return 1;
 	exif_log (eld->log, EXIF_LOG_CODE_DEBUG, "ExifLoader",
 		  "Scanning %i byte(s) of data...", len);