(This is a feature request, so no log needed.)
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
** Also affects: linux (Ubuntu Hirsute)
Importance: Undecided
Status: Confirmed
** Also affects: linux (Ubuntu Groovy)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Groovy)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1905975
Title:
kernel: Enable CONFIG_BPF_LSM on Ubuntu
Status in linux package in Ubuntu:
Confirmed
Status in linux source package in Groovy:
Confirmed
Status in linux source package in Hirsute:
Confirmed
Bug description:
== Impact ==
Enabling CONFIG_BPF_LSM in the KConfig of Ubuntu Kernels, allowing
users to use BPF LSM programs.
== Background ==
The BPF LSM was merged into the Linux kernel 5.7
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=641cd7b06c911c5935c34f24850ea18690649917
https://outflux.net/blog/archives/2020/09/21/security-things-in-
linux-v5-7
It allows users to implement MAC and Audit Policies using BPF
programs. As a follow-up from the interest generated by the LSM on
BPF/Linux conferences and on request from users, we’d like to request
the enabling of CONFIG_BPF_LSM on Ubuntu starting with H.
The LSM won't be added to the list of active LSMs by default (in
CONFIG_LSM or lsm= on the boot parameters) yet, as it adds an indirect
function call overhead by registering an empty LSM hook for all hooks.
However enabling it in the kernel config will support users who wish
to use BPF LSM programs without needing to replace their kernel image.
The LSM can be made "active" by default when our work on getting rid
of this overhead is merged in the kernel:
https://lore.kernel.org/bpf/[email protected]
== Regression Potential ==
None. The LSM is not active by default, so it does not have any
performance or functional regression.
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