From: Dave Jones <davej@redhat.com>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
Rusty Russell <rusty@rustcorp.com.au>,
Darren Hart <darren@dvhart.com>,
Peter Zijlstra <peterz@infradead.org>
Subject: Re: 3.5-rc6 futex_wait_requeue_pi oops.
Date: Fri, 13 Jul 2012 14:54:02 -0400 [thread overview]
Message-ID: <20120713185402.GA1707@redhat.com> (raw)
In-Reply-To: <alpine.LFD.2.02.1207132032330.32033@ionos>
On Fri, Jul 13, 2012 at 08:47:38PM +0200, Thomas Gleixner wrote:
> On Fri, 13 Jul 2012, Dave Jones wrote:
>
> > Looks like calling futex() with garbage makes things unhappy.
>
> WARN_ON(!&q.pi_state);
> pi_mutex = &q.pi_state->pi_mutex;
> ret = rt_mutex_finish_proxy_lock(pi_mutex, to, &rt_waiter, 1);
> debug_rt_mutex_free_waiter(&rt_waiter);
>
> So there is some weird way which causes q.pi_state = NULL. Dave, did
> you see the warning before the oops happened ?
No, that didn't seem to trigger.
Dave
next prev parent reply other threads:[~2012-07-13 18:54 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-13 18:08 Dave Jones
2012-07-13 18:47 ` Thomas Gleixner
2012-07-13 18:54 ` Dave Jones [this message]
2012-07-13 19:11 ` Thomas Gleixner
2012-07-13 19:56 ` Dave Jones
[not found] ` <CAGChsmNnE_iEKWagULzewSPWsAbaA2A-mXg4CS+vyG3a8Pbj1A@mail.gmail.com>
2012-07-13 20:54 ` Dave Jones
2012-07-19 23:22 ` Darren Hart
2012-07-20 0:37 ` Darren Hart
2012-07-20 6:53 ` Darren Hart
2012-07-20 13:35 ` Dave Jones
2012-07-20 15:10 ` Darren Hart
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