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Message-ID: <5702.1272822394@localhost>
Date:	Sun, 02 May 2010 13:46:34 -0400
From:	Valdis.Kletnieks@...edu
To:	Andrew Morton <akpm@...ux-foundation.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Patrick McHardy <kaber@...sh.net>,
	"David S. Miller" <davem@...emloft.net>
Cc:	linux-kernel@...r.kernel.org, netfilter-devel@...r.kernel.org,
	netdev@...r.kernel.org
Subject: mmotm 2010-04-28 - RCU whinges

On Wed, 28 Apr 2010 16:53:32 PDT, akpm@...ux-foundation.org said:
> The mm-of-the-moment snapshot 2010-04-28-16-53 has been uploaded to
> 
>    http://userweb.kernel.org/~akpm/mmotm/

I thought we swatted all these, hit another one...

[    9.131490] ctnetlink v0.93: registering with nfnetlink.
[    9.131535]
[    9.131535] ===================================================
[    9.131704] [ INFO: suspicious rcu_dereference_check() usage. ]
[    9.131794] ---------------------------------------------------
[    9.131883] net/netfilter/nf_conntrack_ecache.c:88 invoked rcu_dereference_check() without protection!
[    9.131977]
[    9.131977] other info that might help us debug this:
[    9.131978]
[    9.132218]
[    9.132219] rcu_scheduler_active = 1, debug_locks = 0
[    9.132434] 1 lock held by swapper/1:
[    9.132519]  #0:  (nf_ct_ecache_mutex){+.+...}, at: [<ffffffff8148922d>] nf_conntrack_register_notifier+0x1a/0x75
[    9.132938]
[    9.132939] stack backtrace:
[    9.133129] Pid: 1, comm: swapper Tainted: G        W   2.6.34-rc5-mmotm0428 #1
[    9.133220] Call Trace:
[    9.133319]  [<ffffffff81064832>] lockdep_rcu_dereference+0xaa/0xb2
[    9.133410]  [<ffffffff81489250>] nf_conntrack_register_notifier+0x3d/0x75
[    9.133521]  [<ffffffff81b5a157>] ctnetlink_init+0x71/0xd5
[    9.133627]  [<ffffffff81b5a0e6>] ? ctnetlink_init+0x0/0xd5
[    9.133735]  [<ffffffff810001ef>] do_one_initcall+0x59/0x14e
[    9.133843]  [<ffffffff81b2e68a>] kernel_init+0x144/0x1ce
[    9.133949]  [<ffffffff81003414>] kernel_thread_helper+0x4/0x10
[    9.134060]  [<ffffffff81598a40>] ? restore_args+0x0/0x30
[    9.134196]  [<ffffffff81b2e546>] ? kernel_init+0x0/0x1ce
[    9.134328]  [<ffffffff81003410>] ? kernel_thread_helper+0x0/0x10
[    9.134530] ip_tables: (C) 2000-2006 Netfilter Core Team
[    9.134655] TCP bic registered


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