Re: [RFC PATCH v1 3/8] sched/cpufreq_schedutil: make worker kthread be SCHED_DEADLINE

[Peter Zijlstra]

On Wed, Jul 05, 2017 at 09:59:00AM +0100, Juri Lelli wrote:
> @@ -4065,6 +4067,9 @@ static int __sched_setscheduler(struct task_struct *p,
>       }
>  
>       if (user) {
> +             if (attr->sched_flags & SCHED_FLAG_SPECIAL)
> +                     return -EPERM;

Should be -EINVAL I think, as if the bit didn't exist at all (it
doesn't, from a userspace perspective).

> +
>               retval = security_task_setscheduler(p);
>               if (retval)
>                       return retval;