Re: [PATCH bpf-next 2/2] bpf: prevent decl_tag from being referenced in func_proto

[Martin KaFai Lau <martin.lau@xxxxxxxxx>]

On 10/14/22 5:24 PM, Stanislav Fomichev wrote:
> diff --git a/kernel/bpf/btf.c b/kernel/bpf/btf.c
> index eba603cec2c5..35c07afac924 100644
> --- a/kernel/bpf/btf.c
> +++ b/kernel/bpf/btf.c
> @@ -4436,6 +4436,11 @@ static int btf_func_proto_check(struct btf_verifier_env *env,
>   			return -EINVAL;
>   		}
>   
> +		if (btf_type_is_resolve_source_only(ret_type)) {
> +			btf_verifier_log_type(env, t, "Invalid return type");
> +			return -EINVAL;
> +		}

Thanks for the fix.  It is applied to the bpf tree.