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 17:53:13 -0400 [thread overview]
Message-ID: <45FDB4C9.5030103@redhat.com> (raw)
In-Reply-To: <1174253579.13341.477.camel@localhost.localdomain>
Thomas Gleixner wrote:
> On Sun, 2007-03-18 at 17:16 -0400, Chuck Ebbert wrote:
>> 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?
>
> This replaces the fix Andrew did.
>
> http://marc.info/?l=linux-kernel&m=117407812411997&w=2
>
Right, but is the original "Prevent DOS" patch from you still needed?
Or did Andrew's patch replace that one, and now this replaces his?
next prev parent reply other threads:[~2007-03-18 21:57 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
2007-03-18 21:32 ` Thomas Gleixner
2007-03-18 21:53 ` Chuck Ebbert [this message]
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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