From: Vasiliy Kulikov <segoon@openwall.com>
To: Marc Zyngier <marc.zyngier@arm.com>
Cc: serge.hallyn@canonical.com,
user-mode-linux-devel@lists.sourceforge.net,
Richard Weinberger <richard@nod.at>,
linux-kernel@vger.kernel.org, toralf.foerster@gmx.de,
akpm@linux-foundation.org, torvalds@linux-foundation.org
Subject: Re: [uml-devel] shm updates broke UML
Date: Mon, 1 Aug 2011 21:24:52 +0400 [thread overview]
Message-ID: <20110801172452.GA26190@albatros> (raw)
In-Reply-To: <08cf4697685ecd9bcb7e4eefe516f2ee@localhost>
On Mon, Aug 01, 2011 at 19:19 +0200, Marc Zyngier wrote:
> Here you go (sorry about the line wrapping, damned webmail...):
Thank you! Now I see that the problem is rw_mutex is not initialized:
down_write(&shm_ids(ns).rw_mutex);
void __sched __down_write_nested(struct rw_semaphore *sem, int subclass)
{
...
if (sem->activity == 0 && list_empty(&sem->wait_list)) {
^^^^^^^^^^^^^^^ is NULL
Wtf - ipc namespace should be fully initialized for the moment of
threads run...
> Calibrating local timer... 104.99MHz.
> CPU1: Booted secondary processor
> CPU1: Unknown IPI message 0x1
> CPU2: Booted secondary processor
> CPU2: Unknown IPI message 0x1
> CPU3: Booted secondary processor
> CPU3: Unknown IPI message 0x1
> Brought up 4 CPUs
> SMP: Total of 4 processors activated (333.41 BogoMIPS).
> ns = c0447474, ids = c04474d0
> ns = c0447474, ids = c04474d0
> wait_list = c04474e0
> next = (null)
^^^^^^
--
Vasiliy Kulikov
http://www.openwall.com - bringing security into open computing environments
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WARNING: multiple messages have this Message-ID (diff)
From: Vasiliy Kulikov <segoon@openwall.com>
To: Marc Zyngier <marc.zyngier@arm.com>
Cc: Richard Weinberger <richard@nod.at>,
serge.hallyn@canonical.com, torvalds@linux-foundation.org,
akpm@linux-foundation.org, linux-kernel@vger.kernel.org,
user-mode-linux-devel@lists.sourceforge.net,
toralf.foerster@gmx.de
Subject: Re: shm updates broke UML
Date: Mon, 1 Aug 2011 21:24:52 +0400 [thread overview]
Message-ID: <20110801172452.GA26190@albatros> (raw)
In-Reply-To: <08cf4697685ecd9bcb7e4eefe516f2ee@localhost>
On Mon, Aug 01, 2011 at 19:19 +0200, Marc Zyngier wrote:
> Here you go (sorry about the line wrapping, damned webmail...):
Thank you! Now I see that the problem is rw_mutex is not initialized:
down_write(&shm_ids(ns).rw_mutex);
void __sched __down_write_nested(struct rw_semaphore *sem, int subclass)
{
...
if (sem->activity == 0 && list_empty(&sem->wait_list)) {
^^^^^^^^^^^^^^^ is NULL
Wtf - ipc namespace should be fully initialized for the moment of
threads run...
> Calibrating local timer... 104.99MHz.
> CPU1: Booted secondary processor
> CPU1: Unknown IPI message 0x1
> CPU2: Booted secondary processor
> CPU2: Unknown IPI message 0x1
> CPU3: Booted secondary processor
> CPU3: Unknown IPI message 0x1
> Brought up 4 CPUs
> SMP: Total of 4 processors activated (333.41 BogoMIPS).
> ns = c0447474, ids = c04474d0
> ns = c0447474, ids = c04474d0
> wait_list = c04474e0
> next = (null)
^^^^^^
--
Vasiliy Kulikov
http://www.openwall.com - bringing security into open computing environments
next prev parent reply other threads:[~2011-08-01 17:25 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-01 13:41 shm updates broke UML Richard Weinberger
2011-08-01 13:49 ` Vasiliy Kulikov
2011-08-01 14:04 ` [uml-devel] " Richard Weinberger
2011-08-01 14:04 ` Richard Weinberger
2011-08-01 16:01 ` Marc Zyngier
2011-08-01 16:01 ` Marc Zyngier
2011-08-01 17:10 ` Vasiliy Kulikov
2011-08-01 17:19 ` Marc Zyngier
2011-08-01 17:19 ` Marc Zyngier
2011-08-01 17:24 ` Vasiliy Kulikov [this message]
2011-08-01 17:24 ` Vasiliy Kulikov
2011-08-01 17:32 ` [uml-devel] " Vasiliy Kulikov
2011-08-01 17:32 ` Vasiliy Kulikov
2011-08-01 17:43 ` Marc Zyngier
2011-08-04 11:04 ` Toralf Förster
2011-08-04 11:04 ` Toralf Förster
2011-08-04 11:16 ` [uml-devel] " Vasiliy Kulikov
2011-08-04 11:16 ` Vasiliy Kulikov
2011-08-01 17:20 ` Richard Weinberger
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