Re: [PATCH] bpf, btf: switch CONFIG_CFI_CLANG to CONFIG_CFI

[Sami Tolvanen]

Hi Carlos,

On Thu, Mar 12, 2026 at 11:38 AM Carlos Llamas <cmllamas@xxxxxxxxxx> wrote:
>
> This was renamed in commit 23ef9d439769 ("kcfi: Rename CONFIG_CFI_CLANG
> to CONFIG_CFI") as it is now a compiler-agnostic option. Using the wrong
> name results in the code getting compiled out. Meaning the CFI failures
> for btf_dtor_kfunc_t would still trigger.
>
> Fixes: 99fde4d06261 ("bpf, btf: Enforce destructor kfunc type with CFI")
> Signed-off-by: Carlos Llamas <cmllamas@xxxxxxxxxx>
> ---
>  kernel/bpf/btf.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/kernel/bpf/btf.c b/kernel/bpf/btf.c
> index 4872d2a6c42d..84665f76a3c6 100644
> --- a/kernel/bpf/btf.c
> +++ b/kernel/bpf/btf.c
> @@ -9003,7 +9003,7 @@ static int btf_check_dtor_kfuncs(struct btf *btf, const struct btf_id_dtor_kfunc
>                 if (!t || !btf_type_is_ptr(t))
>                         return -EINVAL;
>
> -               if (IS_ENABLED(CONFIG_CFI_CLANG)) {
> +               if (IS_ENABLED(CONFIG_CFI)) {
>                         /* Ensure the destructor kfunc type matches btf_dtor_kfunc_t */
>                         t = btf_type_by_id(btf, t->type);
>                         if (!btf_type_is_void(t))

Thanks for the fix!

Reviewed-by: Sami Tolvanen <samitolvanen@xxxxxxxxxx>

Sami