From: Pavel Machek <pavel@suse.cz>
To: Andi Kleen <ak@suse.de>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>,
Dong Feng <middle.fengdong@gmail.com>,
Christoph Lameter <clameter@sgi.com>,
Arjan van de Ven <arjan@infradead.org>,
Paul Mackerras <paulus@samba.org>,
David Howells <dhowells@redhat.com>,
linux-kernel@vger.kernel.org
Subject: Re: How is Code in do_sys_settimeofday() safe in case of SMP and Nest Kernel Path?
Date: Tue, 3 Oct 2006 08:03:53 +0000 [thread overview]
Message-ID: <20061003080352.GA4078@ucw.cz> (raw)
In-Reply-To: <200609301703.45364.ak@suse.de>
On Sat 30-09-06 17:03:45, Andi Kleen wrote:
>
> > Did you get to the bottom of this yet? It looks like you're right,
> > and I suggest a seqlock might be a good option.
>
> It basically doesn't matter because nobody changes the time zone after boot.
Attacker might; in a tight loop, to confuse time-of-day subsystem, or
maybe oops the kernel.
Pavel
--
Thanks for all the (sleeping) penguins.
next prev parent reply other threads:[~2006-10-03 8:04 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-29 14:33 How is Code in do_sys_settimeofday() safe in case of SMP and Nest Kernel Path? Dong Feng
2006-09-29 16:05 ` Christoph Lameter
2006-09-29 16:16 ` Dong Feng
2006-09-30 14:37 ` Nick Piggin
2006-09-30 15:03 ` Andi Kleen
2006-09-30 17:13 ` Christoph Lameter
2006-10-02 10:08 ` Samuel Tardieu
2006-10-03 8:03 ` Pavel Machek [this message]
2006-10-03 10:03 ` Andi Kleen
2006-09-30 16:09 ` Dong Feng
2006-09-30 17:26 ` Christoph Lameter
2006-10-01 3:48 ` Nick Piggin
2006-10-01 12:22 ` Dong Feng
2006-10-02 10:12 ` Samuel Tardieu
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