static void perf_event_comm_event(struct perf_comm_event *comm_event)
{
	char comm[TASK_COMM_LEN];
	unsigned int size;

	memset(comm, 0, sizeof(comm));
	strlcpy(comm, comm_event->task->comm, sizeof(comm));
	size = ALIGN(strlen(comm)+1, sizeof(u64));

	comm_event->comm = comm;
	comm_event->comm_size = size;

	comm_event->event_id.header.size = sizeof(comm_event->event_id) + size;

	perf_iterate_sb(perf_event_comm_output,
		       comm_event,
		       NULL);
}

The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.