linux-kernel - Re: [PATCH 21/23] y2038: itimer: change implementation to timespec64

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Message-ID: <alpine.DEB.2.21.1911141153350.2507@nanos.tec.linutronix.de>
Date:   Thu, 14 Nov 2019 11:57:04 +0100 (CET)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Arnd Bergmann <arnd@...db.de>
cc:     y2038 Mailman List <y2038@...ts.linaro.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ingo Molnar <mingo@...hat.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Anna-Maria Gleixner <anna-maria@...utronix.de>,
        Frederic Weisbecker <frederic@...nel.org>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Kees Cook <keescook@...omium.org>
Subject: Re: [PATCH 21/23] y2038: itimer: change implementation to
 timespec64

On Thu, 14 Nov 2019, Arnd Bergmann wrote:
> On Wed, Nov 13, 2019 at 11:28 PM Thomas Gleixner <tglx@...utronix.de> wrote:
> > On Fri, 8 Nov 2019, Arnd Bergmann wrote:
> > > @@ -197,19 +207,13 @@ static void set_cpu_itimer(struct task_struct *tsk, unsigned int clock_id,
> > >  #define timeval_valid(t) \
> > >       (((t)->tv_sec >= 0) && (((unsigned long) (t)->tv_usec) < USEC_PER_SEC))
> >
> > Hrm, why do we have yet another incarnation of timeval_valid()?
> 
> No idea, you have to ask the author of commit 7d99b7d634d8 ("[PATCH]
> Validate and
> sanitze itimer timeval from userspace") ;-)

I don't know that guy. :)

> > Can we please have only one (the inline version)?
> 
> I'm removing the inline version in a later patch along with most of the rest of
> include/linux/time32.h.
> 
> Having the macro version is convenient for this patch, since I'm using it
> on two different structures (itimerval/__kernel_old_timeval and
> old_itimerval32/old_timeval32), neither of which is the type used in the
> inline function.

Fair enough.

Thanks,

	tglx