[PATCH 3/3] Masquerade sender and limit system-wide signals

[Oleg Nesterov]

On 08/29, sukadev at us.ibm.com wrote:
> 
> +static void masquerade_sender(struct task_struct *t, struct sigqueue *q)
> +{
> +	/*
> +	 * If the sender does not have a pid_t in the receiver's active
> +	 * pid namespace, set si_pid to 0 and pretend signal originated
> +	 * from the kernel.
> +	 */
> +	if (!pid_ns_equal(t)) {
> +		q->info.si_pid = 0;
> +		q->info.si_code = SI_KERNEL;
> +	}

Just curious, shouldn't we also clear si_uid ?

Oleg.