Re: [PATCH] selftests/bpf: Add test for sleepable lsm_cgroup rejection

["Emil Tsalapatis" <emil@etsalapatis.com>]

On Thu Jun 11, 2026 at 10:35 AM EDT, David Windsor wrote:
> Confirm the verifier rejects loading a sleepable BPF_LSM_CGROUP program,
> as introduced in commit 5b038319be44 ("bpf: Reject sleepable
> BPF_LSM_CGROUP programs at load time").
>
> Signed-off-by: David Windsor <dwindsor@gmail.com>

Reviewed-by: Emil Tsalapatis <emil@etsalapatis.com>

> ---
>  tools/testing/selftests/bpf/progs/verifier_lsm.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
>
> diff --git a/tools/testing/selftests/bpf/progs/verifier_lsm.c b/tools/testing/selftests/bpf/progs/verifier_lsm.c
> index 38e8e9176862..2f8103bfa14e 100644
> --- a/tools/testing/selftests/bpf/progs/verifier_lsm.c
> +++ b/tools/testing/selftests/bpf/progs/verifier_lsm.c
> @@ -188,4 +188,13 @@ int BPF_PROG(null_check, struct file *file)
>  	return 0;
>  }
>  
> +SEC("lsm_cgroup/file_open")
> +__description("sleepable lsm_cgroup program is rejected")
> +__failure __msg("Program of this type cannot be sleepable")
> +__flag(BPF_F_SLEEPABLE)
> +int BPF_PROG(sleepable_lsm_cgroup)
> +{
> +	return 0;
> +}
> +
>  char _license[] SEC("license") = "GPL";
>
> base-commit: 30dee2c176e7954f63d1fa3e52d172f30beb9bfb