On Thu, Oct 22, 2020 at 04:27:52PM +0530, Sai Prakash Ranjan wrote:
> Looking at the ETR and other places in the kernel, ETF and the
> ETB are the only places trying to dereference the task(owner)
> in tmc_enable_etf_sink_perf() which is also called from the
> sched_in path as in the call trace.
> @@ -391,6 +392,10 @@ static void *tmc_alloc_etf_buffer(struct coresight_device *csdev,
> {
> int node;
> struct cs_buffers *buf;
> + struct task_struct *task = READ_ONCE(event->owner);
> +
> + if (!task || is_kernel_event(event))
> + return NULL;
This is *wrong*... why do you care about who owns the events?
