From: Wolfgang Walter <wolfgang.walter@stwm.de>
To: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Ingo Molnar <mingo@elte.hu>
Subject: Re: Kernel oops with 2.6.26, padlock and ipsec: probably problem with fpu state changes
Date: Sat, 9 Aug 2008 01:10:42 +0200 [thread overview]
Message-ID: <200808090110.42391.wolfgang.walter@stwm.de> (raw)
In-Reply-To: <20080808193252.GD607@linux-os.sc.intel.com>
On Friday 08 August 2008, Suresh Siddha wrote:
> On Fri, Aug 08, 2008 at 12:09:46PM -0700, Wolfgang Walter wrote:
> > I don't know though why kernel_fpu_begin exactly fixes the problem:
>
> because it prevents taking a DNA fault inside the kernel (resulting
> in TS_USEDFPU not set).
>
> >
> > Maybe preemption must be disabled when padlocks RNG, ACE, Hash-engine etc.
is
> > used. Maybe just some barrier is needed which preempt_disable provides.
>
> problem can happen even when preemption is disabled.
>
> > What should I do now?
>
> I will post your fix(including the other usages) with the appropriate
changelog
> shortly.
>
Fine.
By the way, if padlock is used from userspace, could this be aproblem, too? I
mean not via the kernel crypto layer but directly. I think these extensions
are not restricted to a privileged user.
Regards,
--
Wolfgang Walter
Studentenwerk München
Anstalt des öffentlichen Rechts
Leiter EDV
Leopoldstraße 15
80802 München
Tel: +49 89 38196-276
Fax: +49 89 38196-144
wolfgang.walter@stwm.de
http://www.studentenwerk-muenchen.de/
next prev parent reply other threads:[~2008-08-08 23:10 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200807171653.59177.wolfgang.walter@stwm.de>
[not found] ` <200807301411.01622.wolfgang.walter@stwm.de>
[not found] ` <20080806103354.GA31623@gondor.apana.org.au>
2008-08-06 17:33 ` Wolfgang Walter
2008-08-06 20:14 ` Suresh Siddha
2008-08-06 21:21 ` Suresh Siddha
2008-08-07 0:38 ` Wolfgang Walter
2008-08-08 8:44 ` Wolfgang Walter
2008-08-08 18:31 ` Vegard Nossum
2008-08-07 16:23 ` Wolfgang Walter
2008-08-08 10:36 ` Wolfgang Walter
2008-08-08 18:53 ` Suresh Siddha
2008-08-08 19:01 ` H. Peter Anvin
2008-08-08 19:19 ` Wolfgang Walter
2008-08-08 23:11 ` Suresh Siddha
2008-08-09 0:38 ` Herbert Xu
2008-08-09 1:23 ` Herbert Xu
2008-08-09 1:54 ` Wolfgang Walter
2008-08-09 2:16 ` Herbert Xu
2008-08-09 3:09 ` Wolfgang Walter
2008-08-09 3:20 ` Herbert Xu
2008-08-09 14:29 ` Herbert Xu
2008-08-09 14:32 ` Herbert Xu
2008-08-09 17:52 ` Suresh Siddha
2008-08-10 5:30 ` Herbert Xu
2008-08-10 5:41 ` H. Peter Anvin
2008-08-11 22:57 ` Suresh Siddha
2008-08-09 17:48 ` Suresh Siddha
2008-08-09 1:28 ` Wolfgang Walter
2008-08-09 13:31 ` Herbert Xu
2008-08-09 14:37 ` Herbert Xu
2008-08-09 15:14 ` Wolfgang Walter
2008-08-09 15:57 ` Wolfgang Walter
2008-08-09 16:10 ` H. Peter Anvin
2008-08-09 17:02 ` Wolfgang Walter
2008-08-09 18:52 ` Suresh Siddha
2008-08-09 19:37 ` Suresh Siddha
2008-08-09 22:59 ` Wolfgang Walter
2008-08-10 3:05 ` Herbert Xu
2008-08-11 19:01 ` Suresh Siddha
2008-08-11 19:22 ` Ingo Molnar
2008-08-11 19:24 ` H. Peter Anvin
2008-08-11 20:19 ` Suresh Siddha
2008-08-12 0:39 ` Herbert Xu
2008-08-12 0:42 ` H. Peter Anvin
2008-08-12 0:46 ` Herbert Xu
2008-08-12 0:48 ` H. Peter Anvin
2008-08-12 0:52 ` Herbert Xu
2008-08-12 0:38 ` Wolfgang Walter
2008-08-12 11:43 ` Wolfgang Walter
2008-08-12 12:02 ` Herbert Xu
2008-08-12 18:28 ` Suresh Siddha
2008-08-12 23:40 ` Herbert Xu
2008-08-09 18:12 ` Suresh Siddha
2008-08-09 18:54 ` Suresh Siddha
2008-08-09 16:05 ` H. Peter Anvin
2008-08-09 18:14 ` Suresh Siddha
2008-08-10 0:29 ` Herbert Xu
2008-08-10 1:56 ` Wolfgang Walter
2008-08-10 1:59 ` Herbert Xu
2008-08-09 17:59 ` Suresh Siddha
2008-08-10 1:40 ` Herbert Xu
2008-08-09 1:49 ` Herbert Xu
2008-08-09 1:59 ` H. Peter Anvin
2008-08-09 2:43 ` Wolfgang Walter
2008-08-09 3:30 ` H. Peter Anvin
2008-08-09 10:50 ` Wolfgang Walter
2008-08-08 19:09 ` Wolfgang Walter
2008-08-08 19:32 ` Suresh Siddha
2008-08-08 23:10 ` Wolfgang Walter [this message]
2008-08-08 23:15 ` Suresh Siddha
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