linux-kernel - 2.6.35-rc3 - include/linux/fdtable.h:85 invoked rcu_dereference

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Date:	Sun, 13 Jun 2010 02:36:03 -0400
From:	Miles Lane <miles.lane@...il.com>
To:	paulmck@...ux.vnet.ibm.com
Cc:	linux-kernel@...r.kernel.org
Subject: 2.6.35-rc3 - include/linux/fdtable.h:85 invoked rcu_dereference_check() 
	without protection!

[ 2074.377176] [ INFO: suspicious rcu_dereference_check() usage. ]
[ 2074.377180] ---------------------------------------------------
[ 2074.377185] include/linux/fdtable.h:85 invoked
rcu_dereference_check() without protection!
[ 2074.377189]
[ 2074.377190] other info that might help us debug this:
[ 2074.377191]
[ 2074.377195]
[ 2074.377196] rcu_scheduler_active = 1, debug_locks = 1
[ 2074.377200] no locks held by gvfsd/4402.
[ 2074.377203]
[ 2074.377204] stack backtrace:
[ 2074.377209] Pid: 4402, comm: gvfsd Not tainted 2.6.35-rc3 #1
[ 2074.377213] Call Trace:
[ 2074.377226]  [<ffffffff8106f2c5>] lockdep_rcu_dereference+0x9d/0xa5
[ 2074.377235]  [<ffffffff810e9104>] fcheck_files+0x5c/0xc9
[ 2074.377242]  [<ffffffff810e91c9>] fget_light+0x35/0x96
[ 2074.377250]  [<ffffffff810f77b0>] do_sys_poll+0x1ff/0x3e5
[ 2074.377257]  [<ffffffff810f6eb2>] ? __pollwait+0x0/0xc7
[ 2074.377264]  [<ffffffff810f6f79>] ? pollwake+0x0/0x4f
[ 2074.377271]  [<ffffffff810f6f79>] ? pollwake+0x0/0x4f
[ 2074.377277]  [<ffffffff810f6f79>] ? pollwake+0x0/0x4f
[ 2074.377285]  [<ffffffff812d2f18>] ? __sock_recvmsg_nosec+0x65/0x6e
[ 2074.377292]  [<ffffffff812d4401>] ? __sock_recvmsg+0x49/0x54
[ 2074.377299]  [<ffffffff812d6842>] ? sock_aio_read+0xc2/0xd6
[ 2074.377307]  [<ffffffff810e7faf>] ? do_sync_read+0xc6/0x103
[ 2074.377316]  [<ffffffff8119ec0c>] ? security_file_permission+0x11/0x13
[ 2074.377324]  [<ffffffff8100877a>] ? sysret_check+0x2e/0x69
[ 2074.377331]  [<ffffffff810f7b2a>] sys_poll+0x50/0xbb
[ 2074.377338]  [<ffffffff81008742>] system_call_fastpath+0x16/0x1b
--
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