On Fri, Feb 11, 2022 at 05:47:04PM +0000, Frank van der Linden wrote:
> From: Daniel Borkmann <daniel@xxxxxxxxxxxxx>
>
> commit 08389d888287c3823f80b0216766b71e17f0aba5 upstream.
>
> Add a kconfig knob which allows for unprivileged bpf to be disabled by default.
> If set, the knob sets /proc/sys/kernel/unprivileged_bpf_disabled to value of 2.
>
> This still allows a transition of 2 -> {0,1} through an admin. Similarly,
> this also still keeps 1 -> {1} behavior intact, so that once set to permanently
> disabled, it cannot be undone aside from a reboot.
>
> We've also added extra2 with max of 2 for the procfs handler, so that an admin
> still has a chance to toggle between 0 <-> 2.
>
> Either way, as an additional alternative, applications can make use of CAP_BPF
> that we added a while ago.
>
> Signed-off-by: Daniel Borkmann <daniel@xxxxxxxxxxxxx>
> Signed-off-by: Alexei Starovoitov <ast@xxxxxxxxxx>
> Link: https://lore.kernel.org/bpf/74ec548079189e4e4dffaeb42b8987bb3c852eee.1620765074.git.daniel@xxxxxxxxxxxxx
> [fllinden@xxxxxxxxxx: backported to 5.4]
> Signed-off-by: Frank van der Linden <fllinden@xxxxxxxxxx>
Thanks for the backports, all now queued up.
greg k-h
