From: Christoph Lameter <cl@linux.com>
To: Markus Trippelsdorf <markus@trippelsdorf.de>
Cc: Eric Dumazet <eric.dumazet@gmail.com>,
"Alex,Shi" <alex.shi@intel.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
Pekka Enberg <penberg@kernel.org>, Matt Mackall <mpm@selenic.com>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
tj@kernel.org, dri-devel@lists.freedesktop.org,
Alex Deucher <alexander.deucher@amd.com>
Subject: Re: WARNING: at mm/slub.c:3357, kernel BUG at mm/slub.c:3413
Date: Wed, 23 Nov 2011 10:06:24 -0600 (CST) [thread overview]
Message-ID: <alpine.DEB.2.00.1111231004490.17317@router.home> (raw)
In-Reply-To: <20111123160353.GA1673@x4.trippels.de>
On Wed, 23 Nov 2011, Markus Trippelsdorf wrote:
> > FIX idr_layer_cache: Marking all objects used
>
> Yesterday I couldn't reproduce the issue at all. But today I've hit
> exactly the same spot again. (CCing the drm list)
Well this is looks like write after free.
> =============================================================================
> BUG idr_layer_cache: Poison overwritten
> -----------------------------------------------------------------------------
> Object ffff8802156487c0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> Object ffff8802156487d0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> Object ffff8802156487e0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> Object ffff8802156487f0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> Object ffff880215648800: 00 00 00 00 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b ....kkkkkkkkkkkk
> Object ffff880215648810: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
And its an integer sized write of 0. If you look at the struct definition
and lookup the offset you should be able to locate the field that
was modified.
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next prev parent reply other threads:[~2011-11-23 16:06 UTC|newest]
Thread overview: 109+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-18 7:25 WARNING: at mm/slub.c:3357, kernel BUG at mm/slub.c:3413 Markus Trippelsdorf
2011-11-18 7:55 ` Markus Trippelsdorf
2011-11-18 8:43 ` Alex,Shi
2011-11-18 8:54 ` Markus Trippelsdorf
2011-11-18 8:57 ` Markus Trippelsdorf
2011-11-18 12:02 ` Markus Trippelsdorf
2011-11-21 0:44 ` Alex,Shi
2011-11-21 7:29 ` Markus Trippelsdorf
2011-11-21 8:05 ` Markus Trippelsdorf
2011-11-21 8:24 ` Markus Trippelsdorf
2011-11-21 8:56 ` Eric Dumazet
2011-11-21 9:16 ` Eric Dumazet
2011-11-21 13:15 ` Markus Trippelsdorf
2011-11-21 14:16 ` Eric Dumazet
2011-11-21 14:21 ` Markus Trippelsdorf
2011-11-21 15:36 ` Markus Trippelsdorf
2011-11-21 15:48 ` Eric Dumazet
2011-11-21 16:10 ` Markus Trippelsdorf
2011-11-21 16:34 ` Markus Trippelsdorf
2011-11-22 8:36 ` Markus Trippelsdorf
2011-12-19 3:21 ` Eric W. Biederman
2011-12-19 9:19 ` Markus Trippelsdorf
2011-12-19 9:06 ` Eric W. Biederman
2011-11-21 16:52 ` Eric Dumazet
2011-11-21 17:15 ` Eric Dumazet
2011-11-21 17:35 ` Markus Trippelsdorf
2011-11-21 18:39 ` Eric Dumazet
2011-11-21 18:52 ` Markus Trippelsdorf
2011-11-21 19:51 ` Markus Trippelsdorf
2011-11-21 20:27 ` Benjamin Herrenschmidt
2011-11-21 21:30 ` Pekka Enberg
2011-11-21 21:43 ` Christoph Lameter
2011-11-22 0:21 ` Christian Kujau
2011-11-22 0:42 ` Christian Kujau
2011-11-22 2:17 ` Benjamin Herrenschmidt
2011-11-22 8:37 ` Christian Kujau
2011-11-22 3:18 ` Christoph Lameter
2011-11-22 7:48 ` Eric Dumazet
2011-11-22 7:51 ` Markus Trippelsdorf
2011-11-22 8:27 ` Eric Dumazet
2011-11-23 7:13 ` Markus Trippelsdorf
2011-11-23 7:20 ` Eric Dumazet
2011-11-22 8:39 ` Christian Kujau
2011-11-22 22:16 ` Benjamin Herrenschmidt
2011-11-22 22:31 ` Eric Dumazet
2011-11-22 22:32 ` Christoph Lameter
2011-11-22 21:58 ` Benjamin Herrenschmidt
2011-11-22 23:12 ` Christian Kujau
2011-11-23 0:18 ` Benjamin Herrenschmidt
2011-11-23 1:22 ` Christian Kujau
2011-11-23 1:43 ` Benjamin Herrenschmidt
2011-11-23 5:51 ` Christian Kujau
2011-11-23 6:59 ` Pekka Enberg
2011-11-23 15:14 ` slub: use irqsafe_cpu_cmpxchg for put_cpu_partial Christoph Lameter
2011-11-23 16:04 ` Eric Dumazet
2011-11-23 18:33 ` Christian Kujau
2011-11-24 6:45 ` Pekka Enberg
2011-11-23 23:15 ` David Rientjes
2011-11-22 8:45 ` WARNING: at mm/slub.c:3357, kernel BUG at mm/slub.c:3413 Markus Trippelsdorf
2011-11-22 9:25 ` Eric Dumazet
2011-11-22 9:27 ` Eric Dumazet
2011-11-22 9:38 ` Eric Dumazet
2011-11-22 9:46 ` Eric Dumazet
2011-11-22 14:46 ` Christoph Lameter
2011-11-22 14:52 ` Eric Dumazet
2011-11-22 15:02 ` Christoph Lameter
2011-11-22 15:07 ` Christoph Lameter
2011-11-22 16:20 ` Christoph Lameter
2011-11-22 16:32 ` Eric Dumazet
2011-11-22 16:36 ` Christoph Lameter
2011-11-22 16:41 ` Christoph Lameter
2011-11-22 16:53 ` slub: Lockout validation scans during freeing of object Christoph Lameter
2011-11-22 17:21 ` Eric Dumazet
2011-11-22 17:40 ` Christoph Lameter
2011-11-22 18:55 ` Markus Trippelsdorf
2011-11-22 19:20 ` Christoph Lameter
2011-11-22 19:32 ` Markus Trippelsdorf
2011-11-22 19:46 ` Christoph Lameter
2011-11-22 17:59 ` Christoph Lameter
2011-11-22 11:21 ` WARNING: at mm/slub.c:3357, kernel BUG at mm/slub.c:3413 Markus Trippelsdorf
2011-11-22 14:50 ` Christoph Lameter
2011-11-22 14:44 ` Christoph Lameter
2011-11-21 15:51 ` Markus Trippelsdorf
2011-11-23 16:03 ` Markus Trippelsdorf
2011-11-23 16:06 ` Christoph Lameter [this message]
2011-11-24 8:50 ` Markus Trippelsdorf
2011-12-01 8:44 ` Markus Trippelsdorf
2011-12-01 8:53 ` Pekka Enberg
2011-12-02 19:43 ` Jerome Glisse
2011-12-02 20:06 ` Markus Trippelsdorf
2011-12-02 20:48 ` Markus Trippelsdorf
2011-12-07 14:32 ` Robert Richter
2011-12-07 14:39 ` Markus Trippelsdorf
2011-12-02 23:04 ` Jerome Glisse
2011-12-03 9:28 ` Markus Trippelsdorf
2011-12-03 12:20 ` Dave Airlie
2011-12-03 12:29 ` Markus Trippelsdorf
2011-12-03 19:31 ` Jerome Glisse
2011-12-03 19:32 ` Jerome Glisse
2011-12-04 1:02 ` Markus Trippelsdorf
2011-12-04 17:32 ` Jerome Glisse
2011-12-05 17:10 ` Jerome Glisse
2011-12-05 18:15 ` Markus Trippelsdorf
2011-12-05 18:43 ` Jerome Glisse
2011-12-05 19:11 ` Jerome Glisse
2011-12-05 19:27 ` Markus Trippelsdorf
2011-12-05 20:10 ` Pekka Enberg
2011-12-05 20:20 ` Jerome Glisse
2011-12-05 10:44 ` David Laight
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