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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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