These KVM test appliance images are designed to be used with the kvm-xfstests system which can be found here: git://git.kernel.org/pub/scm/fs/ext2/xfstests-bld.git If you are testing a 32-bit x86 kernel you must use the root_fs.img.i386. If you are using a 64-bit kernel, you may use either the i386 or x86_64 root_fs.img file. Information on how to use these images can be found at the Quick Start guide, located at: https://github.com/tytso/xfstests-bld/blob/master/Documentation/kvm-quickstart.md The "corresponding source" of the GPL binaries found in these KVM images can be found in the source packages from this snapshot of Debian distribution's Stretch release: http://snapshot.debian.org/archive/debian/20180418T161205Z/ ... as well as the following git repositories: e2fsprogs v1.44.1 (Sat, 24 Mar 2018 22:42:47 -0400) fio fio-3.2 (Fri, 3 Nov 2017 15:23:49 -0600) ima-evm-utils c860e0d (Thu, 15 Feb 2018 08:02:19 -0500) fsverity 2a7dbea (Mon, 23 Apr 2018 15:40:32 -0700) quota 59b280e (Mon, 5 Feb 2018 16:48:22 +0100) xfsprogs v4.16.0 (Thu, 26 Apr 2018 15:13:34 -0500) xfstests-bld 0083ccb (Mon, 30 Apr 2018 01:06:57 -0400) xfstests linux-v3.8-1973-gdb5d082c (Mon, 30 Apr 2018 22:28:21 -0400) The gen-image script found in the kvm-xfstests/test-appliance directory of the xfstests-bld git repository, plus Debian jessie's debootstrap, constitutes the scripts used to control the creation of these KVM images. Local changes to xfstests can be found at: https://github.com/tytso/xfstests release-2018-04-30-db5d082c The URL's for the other git repositories and scripts to download the sources from those repositories can be found in xfstests-bld's scripts.