Re: [PATCH] signal: Avoid corrupting si_pid and si_uid in do_notify_parent

[Christian Brauner]

On Tue, Apr 21, 2020 at 02:17:22PM +0200, Oleg Nesterov wrote:
> On 04/21, Christian Brauner wrote:
> >
> > process B setnses into
> > <pidnsC> which is a sibling pid namespace,
> 
> please see pidns_install(), it verifies that
> 
> 	* Only allow entering the current active pid namespace
> 	* or a child of the current active pid namespace.

I forgot about that.

Though, don't we have the same problem in:

static void do_notify_parent_cldstop(struct task_struct *tsk,
				     bool for_ptracer, int why)

at least for the for_ptrace is false case?

Christian