linux-kernel - Re: [PATCH RESEND 1/2] tracing: syscall_*regfunc() can race with copy

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Date:	Fri, 11 Apr 2014 17:58:45 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...nel.org>
Subject: Re: [PATCH RESEND 1/2] tracing: syscall_*regfunc() can race with
	copy_process()

On 04/11, Steven Rostedt wrote:
>
> On Thu, 10 Apr 2014 15:34:35 +0200
> Oleg Nesterov <oleg@...hat.com> wrote:
>
> > On 04/10, Steven Rostedt wrote:
> > >
> > > On Wed, 9 Apr 2014 19:05:42 +0200
> > > Oleg Nesterov <oleg@...hat.com> wrote:
> > >
> > > > --- a/kernel/fork.c
> > > > +++ b/kernel/fork.c
> > > > @@ -1472,7 +1472,9 @@ static struct task_struct *copy_process(unsigned long clone_flags,
> > > >
> > > >  	total_forks++;
> > > >  	spin_unlock(&current->sighand->siglock);
> > > > +	syscall_tracepoint_update(p);
> > > >  	write_unlock_irq(&tasklist_lock);
> > > > +
> > >
> > > So this looks to be a fix that probably should go to stable?
> >
> > Not sure, this is up to you.
>
> I'll have to think about this one, whether or not it should go to
> stable.

...

> > > These changes should be in a separate patch, as they can wait till 3.16.
> >
> > OK, I'll split this change.
>
> Are you going to send a new series?

Yes, will do. I will split 1/2, and I need to update the changelog
in 2/2.

Oleg.

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