[PATCH v4 3/4] selftests/bpf: Add tests verifying bpf lsm userns_create hook

[KP Singh]

On Mon, Aug 1, 2022 at 8:02 PM Frederick Lawler <fred at cloudflare.com> wrote:
>
> The LSM hook userns_create was introduced to provide LSM's an
> opportunity to block or allow unprivileged user namespace creation. This
> test serves two purposes: it provides a test eBPF implementation, and
> tests the hook successfully blocks or allows user namespace creation.
>
> This tests 3 cases:
>
>         1. Unattached bpf program does not block unpriv user namespace
>            creation.
>         2. Attached bpf program allows user namespace creation given
>            CAP_SYS_ADMIN privileges.
>         3. Attached bpf program denies user namespace creation for a
>            user without CAP_SYS_ADMIN.
>
> Signed-off-by: Frederick Lawler <fred at cloudflare.com>

Looks good to me (Also checked it on vmtest.sh)

Acked-by: KP Singh <kpsingh at kernel.org>