This is a packaged upstream version of the Linux kernel.
The sources may be found at most Linux archive sites, including:
https://www.kernel.org/pub/linux/kernel
Copyright: 1991 - 2023 Linus Torvalds and others.
The git repository for mainline kernel development is at:
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 dated June, 1991.
On Debian GNU/Linux systems, the complete text of the GNU General Public
License version 2 can be found in `/usr/share/common-licenses/GPL-2'.