Re: [PATCH v8 1/2] seccomp: add a return code to trap to userspace

Oleg Nesterov
2018-10-30T16:27:59Z

On 10/30, Tycho Andersen wrote:
>
> @@ -828,6 +823,11 @@ static int __seccomp_filter(int this_syscall, const struct seccomp_data *sd,
> */
> rmb();
>
> + if (!sd) {
> + populate_seccomp_data(&sd_local);
> + sd = &sd_local;
> + }
> +

To me it would be more clean to remove the "if (!sd)" check, case(SECCOMP_RET_TRACE)
in __seccomp_filter() can simply do populate_seccomp_data(&sd_local) unconditionally
and pass &sd_local to __seccomp_filter().

Oleg.