A fairly obvious bug with the list (-l) option of gunzip. In this case, "grandma-new.img" is approximately 320 gigabytes. Compressed down to 46gb. "Uncompressed", and "ratio" are wrong.
root@xxx:/Virt# gunzip -V gzip 1.6 Copyright (C) 2007, 2010, 2011 Free Software Foundation, Inc. Copyright (C) 1993 Jean-loup Gailly. This is free software. You may redistribute copies of it under the terms of the GNU General Public License <http://www.gnu.org/licenses/gpl.html>. There is NO WARRANTY, to the extent permitted by law. Written by Jean-loup Gailly. root@xxx:/Virt# gunzip -l /video1/grandma-new.img.gz compressed uncompressed ratio uncompressed_name 46492229886 2245353472 -1970.6% /video1/grandma-new.img root@xxx:/Virt#
