Re: [PATCH] fs/resctrl: Fix use-after-free in resctrl_offline_mon_domain()

[Luck, Tony]

Question?

> +	if (!is_percpu_thread()) {
> +		list_for_each_entry(d, &r->mon_domains, hdr.list) {
> +			if (d->mbm_work_cpu == nr_cpu_ids)
> +				mbm_setup_overflow_handler(d, MBM_OVERFLOW_INTERVAL, RESCTRL_PICK_ANY_CPU);

Should that "MBM_OVERFLOW_INTERVAL" be "0"? This worker is presumably
already slightly late because of the offline CPU overhead and time to
be picked up by another CPU. Maybe it should run right away on whatever
new CPU in the domain is picked?

> +		}
> +		goto out_unlock;
> +	}
> +

-Tony