On Fri, Jul 29, 2022 at 5:08 PM Stanislav Fomichev <sdf@xxxxxxxxxx> wrote:
>
> When attaching to program, the program itself might not be attached
> to anything (and, hence, might not have attach_btf), so we can't
> unconditionally use 'prog->aux->dst_prog->aux->attach_btf'.
> Instead, use bpf_prog_get_target_btf to pick proper target btf:
>
> * when attached to dst_prog, use dst_prog->aux->btf
> * when attached to kernel btf, use prog->aux->attach_btf
>
> Fixes: b79c9fc9551b ("bpf: implement BPF_PROG_QUERY for BPF_LSM_CGROUP")
> Signed-off-by: Stanislav Fomichev <sdf@xxxxxxxxxx>
Looks good to me.
Acked-by: Hao Luo <haoluo@xxxxxxxxxx>
Hao
