From: Chuck Ebbert <cebbert@redhat.com>
To: tglx@linutronix.de
Cc: Andrew Morton <akpm@linux-foundation.org>,
Johannes Bauer <JohannesBauer@gmx.de>,
linux-kernel@vger.kernel.org, schwab@suse.de,
Stable Kernel Team <stable@kernel.org>, Greg KH <greg@kroah.com>,
Adrian Bunk <bunk@stusta.de>, Ingo Molnar <mingo@elte.hu>
Subject: Re: [PATCH] hrtimer: prevent overrun DoS in hrtimer_forward()
Date: Sun, 18 Mar 2007 17:16:43 -0400 [thread overview]
Message-ID: <45FDAC3B.6000202@redhat.com> (raw)
In-Reply-To: <1174079120.13341.286.camel@localhost.localdomain>
Thomas Gleixner wrote:
>
> I'd prefer this one: The maximum seconds value we can handle on 32bit is
> LONG_MAX.
>
> diff --git a/include/linux/ktime.h b/include/linux/ktime.h
> index c68c7ac..248305b 100644
> --- a/include/linux/ktime.h
> +++ b/include/linux/ktime.h
> @@ -57,7 +57,11 @@ typedef union {
> } ktime_t;
>
> #define KTIME_MAX ((s64)~((u64)1 << 63))
> -#define KTIME_SEC_MAX (KTIME_MAX / NSEC_PER_SEC)
> +#if (BITS_PER_LONG == 64)
> +# define KTIME_SEC_MAX (KTIME_MAX / NSEC_PER_SEC)
> +#else
> +# define KTIME_SEC_MAX LONG_MAX
> +#endif
>
> /*
> * ktime_t definitions when using the 64-bit scalar representation:
>
Just to be clear: this replaces the earlier patch, right?
next prev parent reply other threads:[~2007-03-18 21:20 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-13 18:55 x86_64 system lockup from userspace using setitimer() Johannes Bauer
2007-03-13 19:19 ` Andreas Schwab
2007-03-13 20:02 ` Chuck Ebbert
2007-03-13 20:33 ` Thomas Gleixner
2007-03-14 10:00 ` [PATCH] hrtimer: prevent overrun DoS in hrtimer_forward() Thomas Gleixner
2007-03-14 10:08 ` Ingo Molnar
2007-03-16 20:43 ` Andrew Morton
2007-03-16 21:05 ` Thomas Gleixner
2007-03-18 21:16 ` Chuck Ebbert [this message]
2007-03-18 21:32 ` Thomas Gleixner
2007-03-18 21:53 ` Chuck Ebbert
2007-03-18 22:04 ` Thomas Gleixner
2007-03-18 22:02 ` Chuck Ebbert
2007-04-04 21:11 ` Adrian Bunk
2007-04-04 21:30 ` Thomas Gleixner
2007-04-09 13:01 ` Adrian Bunk
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