Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: linux (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/2054810
Title:
Adding bpf to CONFIG_LSM in linux kernel
Status in linux package in Ubuntu:
Confirmed
Bug description:
Linux kernel since 5.7 allows to write eBPF programs which can be
attached to LSM hooks. More details here:
https://www.kernel.org/doc/html/v5.9/bpf/bpf_lsm.html
There are already projects trying to leverage that
systemd with the restrict-fs feature
https://github.com/systemd/systemd/blob/main/src/core/bpf/restrict_fs/restrict-fs.bpf.c
https://github.com/linux-lock/bpflock
https://github.com/lockc-project/lockc
However, BPF LSM has to be enabled by adding bpf to CONFIG_LSM.
That was already done in:
Arch Linux
https://github.com/archlinux/svntogit-
packages/blob/4615bb2493649ad6fa133f864f94cb95c824f361/trunk/config#L9963
Fedora
https://fedorapeople.org/cgit/thl/public_git/kernel.git/tree/kernel-x86_64-fedora.config?h=kernel-5.17.0-0.rc5.20220225git53ab78cd6d5a.106.vanilla.1.fc34&id=e661d91eb909e777a9d28425ef50fcc5ef7fa5ed#n3291
openSUSE
https://github.com/openSUSE/kernel-
source/commit/c2c25b18721866d6211054f542987036ed6e0a50
Debian
https://salsa.debian.org/kernel-
team/linux/-/blob/master/debian/config/config?ref_type=heads#L7713
RedHat
https://access.redhat.com/labs/rhcb/RHEL-8.9/kernel-4.18.0-513.18.1.el8/source/blob/redhat/configs/generic/CONFIG_LSM
Could we please enable BPF LSM in Ubuntu kernels as well? Without that
change, users trying to play with the mentioned projects have to edit
their /etc/default/grub to add bpf LSM.
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