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abrt-dump-oops: Found oopses: 1
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Version: 3.1.0-0.rc0.git19.1.fc17.x86_64
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[ INFO: possible recursive locking detected ]
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3.1.0-0.rc0.git19.1.fc17.x86_64 #1
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---------------------------------------------
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modprobe/684 is trying to acquire lock:
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(&hdl->lock){+.+...}, at: [<ffffffffa02919ba>] find_ref_lock+0x24/0x46 [videodev]
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but task is already holding lock:
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(&hdl->lock){+.+...}, at: [<ffffffffa029380f>] v4l2_ctrl_add_handler+0x49/0x97 [videodev]
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other info that might help us debug this:
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Possible unsafe locking scenario:
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CPU0
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----
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lock(&hdl->lock);
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lock(&hdl->lock);
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*** DEADLOCK ***
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May be due to missing lock nesting notation
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3 locks held by modprobe/684:
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#0: (&__lockdep_no_validate__){......}, at: [<ffffffff81314d0c>] __driver_attach+0x3b/0x82
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#1: (&__lockdep_no_validate__){......}, at: [<ffffffff81314d1a>] __driver_attach+0x49/0x82
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#2: (&hdl->lock){+.+...}, at: [<ffffffffa029380f>] v4l2_ctrl_add_handler+0x49/0x97 [videodev]
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stack backtrace:
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Pid: 684, comm: modprobe Not tainted 3.1.0-0.rc0.git19.1.fc17.x86_64 #1
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Call Trace:
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[<ffffffff8108eb06>] __lock_acquire+0x917/0xcf7
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[<ffffffff81014fbe>] ? sched_clock+0x9/0xd
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[<ffffffff8108dffc>] ? mark_lock+0x2d/0x220
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[<ffffffffa02919ba>] ? find_ref_lock+0x24/0x46 [videodev]
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[<ffffffff8108f3dc>] lock_acquire+0xf3/0x13e
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[<ffffffffa02919ba>] ? find_ref_lock+0x24/0x46 [videodev]
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[<ffffffffa02919ba>] ? find_ref_lock+0x24/0x46 [videodev]
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[<ffffffff814f2523>] __mutex_lock_common+0x5d/0x39a
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[<ffffffffa02919ba>] ? find_ref_lock+0x24/0x46 [videodev]
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[<ffffffff8108f6db>] ? mark_held_locks+0x6d/0x95
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[<ffffffff814f282f>] ? __mutex_lock_common+0x369/0x39a
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[<ffffffff8108f830>] ? trace_hardirqs_on_caller+0x12d/0x164
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[<ffffffff814f296f>] mutex_lock_nested+0x40/0x45
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[<ffffffffa02919ba>] find_ref_lock+0x24/0x46 [videodev]
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[<ffffffffa029367e>] handler_new_ref+0x42/0x18a [videodev]
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[<ffffffffa0293833>] v4l2_ctrl_add_handler+0x6d/0x97 [videodev]
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[<ffffffffa028f71b>] v4l2_device_register_subdev+0x16c/0x257 [videodev]
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[<ffffffffa02ddfe9>] ivtv_gpio_init+0x14e/0x159 [ivtv]
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[<ffffffffa02ebd57>] ivtv_probe+0xdc4/0x1662 [ivtv]
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[<ffffffff8108f6c3>] ? mark_held_locks+0x55/0x95
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[<ffffffff814f41df>] ? _raw_spin_unlock_irqrestore+0x4d/0x61
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[<ffffffff8126a12b>] local_pci_probe+0x44/0x75
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[<ffffffff8126acb1>] pci_device_probe+0xd0/0xff
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[<ffffffff81314bef>] driver_probe_device+0x131/0x213
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[<ffffffff81314d2f>] __driver_attach+0x5e/0x82
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[<ffffffff81314cd1>] ? driver_probe_device+0x213/0x213
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[<ffffffff81313c30>] bus_for_each_dev+0x59/0x8f
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[<ffffffff813147c3>] driver_attach+0x1e/0x20
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[<ffffffff813143db>] bus_add_driver+0xd4/0x22a
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[<ffffffffa02ff000>] ? 0xffffffffa02fefff
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[<ffffffff813151f2>] driver_register+0x98/0x105
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[<ffffffffa02ff000>] ? 0xffffffffa02fefff
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[<ffffffff8126b584>] __pci_register_driver+0x66/0xd2
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[<ffffffffa02ff000>] ? 0xffffffffa02fefff
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[<ffffffffa02ff078>] module_start+0x78/0x1000 [ivtv]
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[<ffffffff81002099>] do_one_initcall+0x7f/0x13a
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[<ffffffffa02ff000>] ? 0xffffffffa02fefff
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[<ffffffff8109a864>] sys_init_module+0x114/0x267
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[<ffffffff814fafc2>] system_call_fastpath+0x16/0x1b
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