From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
To: Henri Roosen <henriroosen@gmail.com>
Cc: Xenomai <xenomai@xenomai.org>
Subject: Re: [Xenomai] kernel NULL pointer dereference
Date: Tue, 04 Sep 2012 16:10:22 +0200 [thread overview]
Message-ID: <50460BCE.8010505@xenomai.org> (raw)
In-Reply-To: <CANKLDmsO-1E7+d9X6-t532RJ=CWY4P4x30nCNCwgHffJjAFkDA@mail.gmail.com>
On 09/04/2012 03:42 PM, Henri Roosen wrote:
> Hi,
>
> I'm using the bleeding edge of Xenomai (0590cb45adce468f619) and Ipipe
> (d21e8cdbdcf21ade) on a x86 multicore system and kernel 3.4.6.
> I reserved one cpu (kernel param isolcpus=1).
>
> Our application triggers the following NULL pointer dereference when I
> set the affinity of some tasks to cpu 0 and other tasks to cpu 1.
> The application does not trigger this when all tasks have the same
> affinity (set via /proc/xenomai/affinity).
>
> I was able to reproduce this also under QEMU and will do some
> debugging, but maybe someone knows what is wrong already by seeing the
> stacktrace below:
Could you try to reduce the bug to a simple testcase which we would try
and run to reproduce?
> [ 108.013023] BUG: unable to handle kernel NULL pointer dereference
at 00000294
> [ 108.013550] IP: [<c0126a91>] __lock_task_sighand+0x53/0xc3
Or send us a disassembly of the function __lock_task_sighand?
--
Gilles.
next prev parent reply other threads:[~2012-09-04 14:10 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-04 13:42 [Xenomai] kernel NULL pointer dereference Henri Roosen
2012-09-04 14:10 ` Gilles Chanteperdrix [this message]
2012-09-04 14:28 ` Henri Roosen
2012-09-04 18:33 ` Gilles Chanteperdrix
2012-09-04 18:43 ` Gilles Chanteperdrix
2012-09-08 6:18 ` Gilles Chanteperdrix
2012-09-04 19:21 ` Gilles Chanteperdrix
2012-09-05 7:26 ` Henri Roosen
2012-09-05 7:28 ` Gilles Chanteperdrix
2012-09-05 7:42 ` Henri Roosen
2012-09-05 8:28 ` Gilles Chanteperdrix
2012-09-05 9:29 ` Henri Roosen
2012-09-05 11:03 ` Gilles Chanteperdrix
2012-09-05 11:21 ` Gilles Chanteperdrix
2012-09-05 12:10 ` Henri Roosen
2012-09-05 12:25 ` Gilles Chanteperdrix
2012-09-05 19:22 ` Gilles Chanteperdrix
2012-09-05 20:38 ` Gilles Chanteperdrix
2012-09-06 8:40 ` Henri Roosen
2012-09-06 8:57 ` Gilles Chanteperdrix
2012-09-06 14:33 ` Henri Roosen
2012-09-06 18:47 ` Gilles Chanteperdrix
2012-09-05 20:14 ` Gilles Chanteperdrix
2012-09-08 10:41 ` Philippe Gerum
2012-09-08 10:43 ` Gilles Chanteperdrix
2012-09-08 11:57 ` Gilles Chanteperdrix
2012-09-08 12:10 ` Philippe Gerum
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