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

On Mon, Aug 1, 2022 at 8:02 PM Frederick Lawler fred@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@cloudflare.com

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

Acked-by: KP Singh kpsingh@kernel.org