Re: fs: INFO: possible irq lock inversion dependency detected in kill_fasync

From: Kari Suvanto
Date: Mon Sep 22 2014 - 08:41:01 EST


> I get a similar splat with rc5+ + tip/master during simple boot. Adding
> more people to CC and leaving in the rest for reference.
>
> [ 13.627241] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
> [ 17.598601] sha256_ssse3: Using AVX optimized SHA-256 implementation
> [ 36.527009] ip_tables: (C) 2000-2006 Netfilter Core Team
> [ 54.867814] tun: Universal TUN/TAP device driver, 1.6
> [ 54.872924] tun: (C) 1999-2004 Max Krasnyansky <maxk@xxxxxxxxxxxx>
> [ 646.712953]
> [ 646.714454] =========================================================
> [ 646.720887] [ INFO: possible irq lock inversion dependency detected ]
> [ 646.727326] 3.17.0-rc5+ #1 Not tainted
> [ 646.731076] ---------------------------------------------------------
> [ 646.737511] swapper/6/0 just changed the state of lock:
> [ 646.742733] (tasklist_lock){.?.+..}, at: [<ffffffff811894eb>] send_sigio+0x5b/0x1b0
> [ 646.750539] but this lock took another, HARDIRQ-unsafe lock in the past:
> [ 646.757233] (&(&p->alloc_lock)->rlock){+.+...}
> [ 646.757233]
> [ 646.757233] and interrupts could create inverse lock ordering between them.
> [ 646.757233]
> [ 646.767783]
> [ 646.767783] other info that might help us debug this:
> [ 646.774306] Possible interrupt unsafe locking scenario:
> [ 646.774306]
> [ 646.781088] CPU0 CPU1
> [ 646.785619] ---- ----
> [ 646.790147] lock(&(&p->alloc_lock)->rlock);
> [ 646.794550] local_irq_disable();
> [ 646.800465] lock(tasklist_lock);
> [ 646.806406] lock(&(&p->alloc_lock)->rlock);
> [ 646.813302] <Interrupt>
> [ 646.815926] lock(tasklist_lock);
> [ 646.819530]

I also get a similar splat but in my case the tasklist_lock is changed to event_lock

[ 13.157233]
[ 13.157256] =========================================================
[ 13.157272] [ INFO: possible irq lock inversion dependency detected ]
[ 13.157288] 3.17.0-999-generic #201409212205 Not tainted
[ 13.157304] ---------------------------------------------------------
[ 13.157320] swapper/0/0 just changed the state of lock:
[ 13.157337] (&(&dev->event_lock)->rlock){-.....}, at: [<ffffffff81650415>] input_event+0x45/0x70
[ 13.157420] but this lock took another, HARDIRQ-unsafe lock in the past:
[ 13.157436] (&(&p->alloc_lock)->rlock){+.+...}
[ 13.157436]
[ 13.157436] and interrupts could create inverse lock ordering between them.
[ 13.157436]
[ 13.157500]
[ 13.157500] other info that might help us debug this:
[ 13.157517] Chain exists of:
[ 13.157517] &(&dev->event_lock)->rlock --> &(&client->buffer_lock)->rlock --> &(&p->alloc_lock)->rlock
[ 13.157517]
[ 13.157631] Possible interrupt unsafe locking scenario:
[ 13.157631]
[ 13.157648] CPU0 CPU1
[ 13.157665] ---- ----
[ 13.157681] lock(&(&p->alloc_lock)->rlock);
[ 13.157730] local_irq_disable();
[ 13.157747] lock(&(&dev->event_lock)->rlock);
[ 13.157798] lock(&(&client->buffer_lock)->rlock);
[ 13.157848] <Interrupt>
[ 13.157864] lock(&(&dev->event_lock)->rlock);
[ 13.157916]
[ 13.157916] *** DEADLOCK ***
[ 13.157916]
[ 13.157932] no locks held by swapper/0/0.
[ 13.157948]
[ 13.157948] the shortest dependencies between 2nd lock and 1st lock:
[ 13.157970] -> (&(&p->alloc_lock)->rlock){+.+...} ops: 30001 {
[ 13.158161] HARDIRQ-ON-W at:
[ 13.158193] [<ffffffff810dbfc8>] __lock_acquire+0x508/0xaf0
[ 13.158227] [<ffffffff810dcd66>] lock_acquire+0xd6/0x2e0
[ 13.158260] [<ffffffff8184f199>] _raw_spin_lock+0x39/0x50
[ 13.158295] [<ffffffff81236abe>] __set_task_comm+0x2e/0x240
[ 13.158329] [<ffffffff810a8cc0>] kthreadd+0x30/0x220
[ 13.158363] [<ffffffff8184ff7c>] ret_from_fork+0x7c/0xb0
[ 13.158395] SOFTIRQ-ON-W at:
[ 13.158426] [<ffffffff810dbd83>] __lock_acquire+0x2c3/0xaf0
[ 13.158459] [<ffffffff810dcd66>] lock_acquire+0xd6/0x2e0
[ 13.158491] [<ffffffff8184f199>] _raw_spin_lock+0x39/0x50
[ 13.158524] [<ffffffff81236abe>] __set_task_comm+0x2e/0x240
[ 13.158556] [<ffffffff810a8cc0>] kthreadd+0x30/0x220
[ 13.158588] [<ffffffff8184ff7c>] ret_from_fork+0x7c/0xb0
[ 13.158620] INITIAL USE at:
[ 13.158652] [<ffffffff810dbdd4>] __lock_acquire+0x314/0xaf0
[ 13.158684] [<ffffffff810dcd66>] lock_acquire+0xd6/0x2e0
[ 13.158716] [<ffffffff8184f199>] _raw_spin_lock+0x39/0x50
[ 13.158749] [<ffffffff81236abe>] __set_task_comm+0x2e/0x240
[ 13.158782] [<ffffffff810a8cc0>] kthreadd+0x30/0x220
[ 13.158815] [<ffffffff8184ff7c>] ret_from_fork+0x7c/0xb0
[ 13.158847] }
[ 13.158864] ... key at: [<ffffffff8211d018>] __key.51912+0x0/0x8
[ 13.158987] ... acquired at:
[ 13.159003] [<ffffffff810dbea8>] __lock_acquire+0x3e8/0xaf0
[ 13.159036] [<ffffffff810dcd66>] lock_acquire+0xd6/0x2e0
[ 13.159068] [<ffffffff8184f199>] _raw_spin_lock+0x39/0x50
[ 13.159100] [<ffffffff8109b21a>] do_prlimit+0x9a/0x200
[ 13.159134] [<ffffffff8109b3aa>] SyS_getrlimit+0x2a/0x70
[ 13.159166] [<ffffffff8185002d>] system_call_fastpath+0x16/0x1b
[ 13.159198]
[ 13.159213] -> (tasklist_lock){.+.+..} ops: 26642 {
[ 13.159308] HARDIRQ-ON-R at:
[ 13.159339] [<ffffffff810dbd61>] __lock_acquire+0x2a1/0xaf0
[ 13.159371] [<ffffffff810dcd66>] lock_acquire+0xd6/0x2e0
[ 13.159403] [<ffffffff8184f4ec>] _raw_read_lock+0x3c/0x50
[ 13.159435] [<ffffffff810842d3>] do_wait+0xe3/0x3f0
[ 13.159467] [<ffffffff81085894>] SyS_wait4+0x64/0xe0
[ 13.159499] [<ffffffff8109c30b>] wait_for_helper+0x4b/0x70
[ 13.159532] [<ffffffff8184ff7c>] ret_from_fork+0x7c/0xb0
[ 13.159564] SOFTIRQ-ON-R at:
[ 13.159595] [<ffffffff810dbd83>] __lock_acquire+0x2c3/0xaf0
[ 13.159627] [<ffffffff810dcd66>] lock_acquire+0xd6/0x2e0
[ 13.159659] [<ffffffff8184f4ec>] _raw_read_lock+0x3c/0x50
[ 13.159691] [<ffffffff810842d3>] do_wait+0xe3/0x3f0
[ 13.159723] [<ffffffff81085894>] SyS_wait4+0x64/0xe0
[ 13.159843] [<ffffffff8109c30b>] wait_for_helper+0x4b/0x70
[ 13.159875] [<ffffffff8184ff7c>] ret_from_fork+0x7c/0xb0
[ 13.159908] INITIAL USE at:
[ 13.159939] [<ffffffff810dbdd4>] __lock_acquire+0x314/0xaf0
[ 13.159971] [<ffffffff810dcd66>] lock_acquire+0xd6/0x2e0
[ 13.160003] [<ffffffff8184f875>] _raw_write_lock_irq+0x45/0x60
[ 13.160035] [<ffffffff8107f06e>] copy_process.part.23+0xc9e/0x1e30
[ 13.160067] [<ffffffff810803b1>] do_fork+0xd1/0x7d0
[ 13.160099] [<ffffffff81080ad6>] kernel_thread+0x26/0x30
[ 13.160131] [<ffffffff81832a46>] rest_init+0x26/0x150
[ 13.160164] [<ffffffff81f5a112>] start_kernel+0x4aa/0x4b7
[ 13.160196] [<ffffffff81f595ee>] x86_64_start_reservations+0x2a/0x2c
[ 13.160228] [<ffffffff81f59733>] x86_64_start_kernel+0x143/0x152
[ 13.160260] }
[ 13.160276] ... key at: [<ffffffff81e0f058>] tasklist_lock+0x18/0x40
[ 13.160309] ... acquired at:
[ 13.160325] [<ffffffff810dbea8>] __lock_acquire+0x3e8/0xaf0
[ 13.160358] [<ffffffff810dcd66>] lock_acquire+0xd6/0x2e0
[ 13.160390] [<ffffffff8184f4ec>] _raw_read_lock+0x3c/0x50
[ 13.160422] [<ffffffff81243225>] send_sigio+0x55/0x160
[ 13.160454] [<ffffffff812433fc>] kill_fasync+0xcc/0x230
[ 13.160487] [<ffffffff81653cf4>] evdev_pass_values+0xe4/0x1b0
[ 13.160520] [<ffffffff8165438b>] evdev_events+0x1ab/0x250
[ 13.160552] [<ffffffff8164c707>] input_to_handler+0x97/0xf0
[ 13.160670] [<ffffffff8164f854>] input_pass_values.part.5+0x2c4/0x2f0
[ 13.160703] [<ffffffff8164ffa9>] input_handle_event+0x129/0x550
[ 13.160736] [<ffffffff816505d8>] input_inject_event+0x198/0x210
[ 13.160768] [<ffffffff816558a7>] evdev_write+0x197/0x220
[ 13.160800] [<ffffffff8122f0e7>] vfs_write+0xb7/0x1f0
[ 13.160832] [<ffffffff8122fb79>] SyS_write+0x49/0xb0
[ 13.160863] [<ffffffff8185002d>] system_call_fastpath+0x16/0x1b
[ 13.160895]
[ 13.160911] -> (&f->f_owner.lock){......} ops: 8 {
[ 13.161005] INITIAL USE at:
[ 13.161036] [<ffffffff810dbdd4>] __lock_acquire+0x314/0xaf0
[ 13.161068] [<ffffffff810dcd66>] lock_acquire+0xd6/0x2e0
[ 13.161101] [<ffffffff8184f875>] _raw_write_lock_irq+0x45/0x60
[ 13.161133] [<ffffffff812425d1>] f_modown+0x31/0xd0
[ 13.161165] [<ffffffff8124275b>] f_setown+0x8b/0x130
[ 13.161197] [<ffffffff81242e51>] SyS_fcntl+0x341/0x6c0
[ 13.161229] [<ffffffff8185002d>] system_call_fastpath+0x16/0x1b
[ 13.161261] }
[ 13.161276] ... key at: [<ffffffff82e879a0>] __key.31267+0x0/0x8
[ 13.161310] ... acquired at:
[ 13.161325] [<ffffffff810dbea8>] __lock_acquire+0x3e8/0xaf0
[ 13.161358] [<ffffffff810dcd66>] lock_acquire+0xd6/0x2e0
[ 13.161390] [<ffffffff8184f4ec>] _raw_read_lock+0x3c/0x50
[ 13.161508] [<ffffffff812431fa>] send_sigio+0x2a/0x160
[ 13.161540] [<ffffffff812433fc>] kill_fasync+0xcc/0x230
[ 13.161571] [<ffffffff81653cf4>] evdev_pass_values+0xe4/0x1b0
[ 13.161603] [<ffffffff8165438b>] evdev_events+0x1ab/0x250
[ 13.161636] [<ffffffff8164c707>] input_to_handler+0x97/0xf0
[ 13.161667] [<ffffffff8164f854>] input_pass_values.part.5+0x2c4/0x2f0
[ 13.161700] [<ffffffff8164ffa9>] input_handle_event+0x129/0x550
[ 13.161733] [<ffffffff816505d8>] input_inject_event+0x198/0x210
[ 13.161764] [<ffffffff816558a7>] evdev_write+0x197/0x220
[ 13.161796] [<ffffffff8122f0e7>] vfs_write+0xb7/0x1f0
[ 13.161827] [<ffffffff8122fb79>] SyS_write+0x49/0xb0
[ 13.161858] [<ffffffff8185002d>] system_call_fastpath+0x16/0x1b
[ 13.161890]
[ 13.161906] -> (&(&new->fa_lock)->rlock){......} ops: 1 {
[ 13.162000] INITIAL USE at:
[ 13.162031] [<ffffffff810dbdd4>] __lock_acquire+0x314/0xaf0
[ 13.162063] [<ffffffff810dcd66>] lock_acquire+0xd6/0x2e0
[ 13.162095] [<ffffffff8184fae1>] _raw_spin_lock_irqsave+0x51/0x70
[ 13.162127] [<ffffffff812433ce>] kill_fasync+0x9e/0x230
[ 13.162159] [<ffffffff81653cf4>] evdev_pass_values+0xe4/0x1b0
[ 13.162191] [<ffffffff8165438b>] evdev_events+0x1ab/0x250
[ 13.162223] [<ffffffff8164c707>] input_to_handler+0x97/0xf0
[ 13.162342] [<ffffffff8164f854>] input_pass_values.part.5+0x2c4/0x2f0
[ 13.162374] [<ffffffff8164ffa9>] input_handle_event+0x129/0x550
[ 13.162406] [<ffffffff816505d8>] input_inject_event+0x198/0x210
[ 13.162438] [<ffffffff816558a7>] evdev_write+0x197/0x220
[ 13.162470] [<ffffffff8122f0e7>] vfs_write+0xb7/0x1f0
[ 13.162502] [<ffffffff8122fb79>] SyS_write+0x49/0xb0
[ 13.162534] [<ffffffff8185002d>] system_call_fastpath+0x16/0x1b
[ 13.162566] }
[ 13.162582] ... key at: [<ffffffff82e882f4>] __key.36860+0x0/0x8
[ 13.162614] ... acquired at:
[ 13.162630] [<ffffffff810dbea8>] __lock_acquire+0x3e8/0xaf0
[ 13.162662] [<ffffffff810dcd66>] lock_acquire+0xd6/0x2e0
[ 13.162694] [<ffffffff8184fae1>] _raw_spin_lock_irqsave+0x51/0x70
[ 13.162726] [<ffffffff814044f2>] fprop_reflect_period_percpu.isra.7+0x22/0xc0
[ 13.162760] [<ffffffff81404a21>] fprop_fraction_percpu+0xa1/0x120
[ 13.162792] [<ffffffff811b7811>] bdi_dirty_limit+0x31/0xc0
[ 13.162825] [<ffffffff8125ce5c>] over_bground_thresh+0x5c/0x80
[ 13.162858] [<ffffffff81261fa8>] bdi_writeback_workfn+0x238/0x910
[ 13.162890] [<ffffffff810a1b1f>] process_one_work+0x1df/0x7f0
[ 13.162922] [<ffffffff810a2251>] worker_thread+0x121/0x490
[ 13.162954] [<ffffffff810a7fcc>] kthread+0xfc/0x120
[ 13.162986] [<ffffffff8184ff7c>] ret_from_fork+0x7c/0xb0
[ 13.163018]
[ 13.163034] -> (&(&client->buffer_lock)->rlock){......} ops: 15 {
[ 13.163214] INITIAL USE at:
[ 13.163245] [<ffffffff810dbdd4>] __lock_acquire+0x314/0xaf0
[ 13.163278] [<ffffffff810dcd66>] lock_acquire+0xd6/0x2e0
[ 13.163310] [<ffffffff8184f199>] _raw_spin_lock+0x39/0x50
[ 13.163342] [<ffffffff81653c6c>] evdev_pass_values+0x5c/0x1b0
[ 13.163375] [<ffffffff8165438b>] evdev_events+0x1ab/0x250
[ 13.163406] [<ffffffff8164c707>] input_to_handler+0x97/0xf0
[ 13.163438] [<ffffffff8164f854>] input_pass_values.part.5+0x2c4/0x2f0
[ 13.163470] [<ffffffff8164ffa9>] input_handle_event+0x129/0x550
[ 13.163502] [<ffffffff81650429>] input_event+0x59/0x70
[ 13.163534] [<ffffffffc04490b0>] snd_jack_report+0xd0/0xe0 [snd]
[ 13.163570] [<ffffffffc066b828>] snd_hda_jack_report_sync+0xd8/0xe0 [snd_hda_codec]
[ 13.163608] [<ffffffffc0623fca>] jack_callback+0x8a/0xa0 [snd_hda_codec_hdmi]
[ 13.163640] [<ffffffffc062408b>] hdmi_unsol_event+0xab/0x140 [snd_hda_codec_hdmi]
[ 13.163673] [<ffffffffc0661187>] process_unsol_events+0x67/0x80 [snd_hda_codec]
[ 13.163706] [<ffffffff810a1b1f>] process_one_work+0x1df/0x7f0
[ 13.163738] [<ffffffff810a2251>] worker_thread+0x121/0x490
[ 13.163769] [<ffffffff810a7fcc>] kthread+0xfc/0x120
[ 13.163801] [<ffffffff8184ff7c>] ret_from_fork+0x7c/0xb0
[ 13.163833] }
[ 13.163849] ... key at: [<ffffffff82eb3018>] __key.29749+0x0/0x8
[ 13.163881] ... acquired at:
[ 13.163897] [<ffffffff810dbea8>] __lock_acquire+0x3e8/0xaf0
[ 13.163930] [<ffffffff810dcd66>] lock_acquire+0xd6/0x2e0
[ 13.164049] [<ffffffff8184fae1>] _raw_spin_lock_irqsave+0x51/0x70
[ 13.164080] [<ffffffff810b7eb1>] try_to_wake_up+0x31/0x510
[ 13.164113] [<ffffffff810b8412>] default_wake_function+0x12/0x20
[ 13.164146] [<ffffffff812450b6>] pollwake+0x66/0x70
[ 13.164177] [<ffffffff810cf3a8>] __wake_up_common+0x58/0x90
[ 13.164210] [<ffffffff810cf65d>] __wake_up+0x3d/0x60
[ 13.164241] [<ffffffffc04449cb>] snd_ctl_notify+0x15b/0x1d0 [snd]
[ 13.164276] [<ffffffffc0448d94>] snd_kctl_jack_report+0x24/0x30 [snd]
[ 13.164311] [<ffffffffc066b810>] snd_hda_jack_report_sync+0xc0/0xe0 [snd_hda_codec]
[ 13.164349] [<ffffffffc0623fca>] jack_callback+0x8a/0xa0 [snd_hda_codec_hdmi]
[ 13.164387] [<ffffffffc062408b>] hdmi_unsol_event+0xab/0x140 [snd_hda_codec_hdmi]
[ 13.164424] [<ffffffffc0661187>] process_unsol_events+0x67/0x80 [snd_hda_codec]
[ 13.164463] [<ffffffff810a1b1f>] process_one_work+0x1df/0x7f0
[ 13.164499] [<ffffffff810a2251>] worker_thread+0x121/0x490
[ 13.164536] [<ffffffff810a7fcc>] kthread+0xfc/0x120
[ 13.164573] [<ffffffff8184ff7c>] ret_from_fork+0x7c/0xb0
[ 13.164610]
[ 13.164628] -> (&(&dev->event_lock)->rlock){-.....} ops: 450 {
[ 13.164735] IN-HARDIRQ-W at:
[ 13.164771] [<ffffffff810dc0fd>] __lock_acquire+0x63d/0xaf0
[ 13.164808] [<ffffffff810dcd66>] lock_acquire+0xd6/0x2e0
[ 13.164845] [<ffffffff8184fae1>] _raw_spin_lock_irqsave+0x51/0x70
[ 13.164969] [<ffffffff81650415>] input_event+0x45/0x70
[ 13.165006] [<ffffffffc02fd0ff>] hidinput_report_event+0x3f/0x50 [hid]
[ 13.165047] [<ffffffffc02fb248>] hid_report_raw_event+0x148/0x1c0 [hid]
[ 13.165086] [<ffffffffc02fb3d2>] hid_input_report+0x112/0x190 [hid]
[ 13.165125] [<ffffffffc0361cb2>] hid_irq_in+0xb2/0x250 [usbhid]
[ 13.165165] [<ffffffff815ffa33>] __usb_hcd_giveback_urb+0x83/0x130
[ 13.165203] [<ffffffff815ffbf3>] usb_hcd_giveback_urb+0x43/0x150
[ 13.165240] [<ffffffff8164115f>] handle_tx_event+0x22f/0x12b0
[ 13.165277] [<ffffffff81642496>] xhci_irq+0x2b6/0xa60
[ 13.165314] [<ffffffff81642c51>] xhci_msi_irq+0x11/0x20
[ 13.165351] [<ffffffff810f1291>] handle_irq_event_percpu+0x41/0x500
[ 13.165389] [<ffffffff810f1791>] handle_irq_event+0x41/0x70
[ 13.165426] [<ffffffff810f460f>] handle_edge_irq+0x7f/0x120
[ 13.165463] [<ffffffff81020a92>] handle_irq+0x22/0x40
[ 13.165500] [<ffffffff81853013>] do_IRQ+0x53/0x100
[ 13.165537] [<ffffffff81850cf2>] ret_from_intr+0x0/0x1a
[ 13.165574] [<ffffffff8169f337>] cpuidle_enter+0x17/0x20
[ 13.165612] [<ffffffff810d01f1>] cpu_idle_loop+0x401/0x4e0
[ 13.165649] [<ffffffff810d032b>] cpu_startup_entry+0x5b/0x60
[ 13.165685] [<ffffffff81832b5d>] rest_init+0x13d/0x150
[ 13.165723] [<ffffffff81f5a112>] start_kernel+0x4aa/0x4b7
[ 13.165760] [<ffffffff81f595ee>] x86_64_start_reservations+0x2a/0x2c
[ 13.165797] [<ffffffff81f59733>] x86_64_start_kernel+0x143/0x152
[ 13.165922] INITIAL USE at:
[ 13.165958] [<ffffffff810dbdd4>] __lock_acquire+0x314/0xaf0
[ 13.165995] [<ffffffff810dcd66>] lock_acquire+0xd6/0x2e0
[ 13.166032] [<ffffffff8184fae1>] _raw_spin_lock_irqsave+0x51/0x70
[ 13.166068] [<ffffffff81650415>] input_event+0x45/0x70
[ 13.166105] [<ffffffff81651cae>] perdevice_input_led_set+0x4e/0x70
[ 13.166142] [<ffffffff81651ed0>] input_led_connect+0x1c0/0x230
[ 13.166179] [<ffffffff8164f311>] input_register_device+0x4f1/0x5c0
[ 13.166216] [<ffffffffc02fffbd>] hidinput_connect+0x33d/0x5f0 [hid]
[ 13.166256] [<ffffffffc02fc4cd>] hid_connect+0x2fd/0x380 [hid]
[ 13.166295] [<ffffffffc02fcba4>] hid_device_probe+0x144/0x160 [hid]
[ 13.166334] [<ffffffff815409cd>] driver_probe_device+0x12d/0x3e0
[ 13.166372] [<ffffffff81540d63>] __driver_attach+0xa3/0xb0
[ 13.166408] [<ffffffff8153e7cb>] bus_for_each_dev+0x6b/0xb0
[ 13.166445] [<ffffffff8154038e>] driver_attach+0x1e/0x20
[ 13.166482] [<ffffffff8153ff68>] bus_add_driver+0x188/0x260
[ 13.166518] [<ffffffff81541c04>] driver_register+0x64/0xf0
[ 13.166555] [<ffffffffc02fa108>] __hid_register_driver+0x68/0xb0 [hid]
[ 13.166594] [<ffffffffc02d501e>] load_misc_binary+0x1e/0x450 [binfmt_misc]
[ 13.166633] [<ffffffff81002144>] do_one_initcall+0xd4/0x210
[ 13.166671] [<ffffffff81124610>] load_module+0x1490/0x1d20
[ 13.166709] [<ffffffff81125036>] SyS_finit_module+0x86/0xb0
[ 13.166746] [<ffffffff8185002d>] system_call_fastpath+0x16/0x1b
[ 13.166783] }
[ 13.166890] ... key at: [<ffffffff82eb2b14>] __key.28123+0x0/0x8
[ 13.166926] ... acquired at:
[ 13.166944] [<ffffffff810d9a29>] check_usage_forwards+0x169/0x170
[ 13.166981] [<ffffffff810db371>] mark_lock+0x1a1/0x2a0
[ 13.167017] [<ffffffff810dc0fd>] __lock_acquire+0x63d/0xaf0
[ 13.167055] [<ffffffff810dcd66>] lock_acquire+0xd6/0x2e0
[ 13.167091] [<ffffffff8184fae1>] _raw_spin_lock_irqsave+0x51/0x70
[ 13.167127] [<ffffffff81650415>] input_event+0x45/0x70
[ 13.167163] [<ffffffffc02fd0ff>] hidinput_report_event+0x3f/0x50 [hid]
[ 13.167203] [<ffffffffc02fb248>] hid_report_raw_event+0x148/0x1c0 [hid]
[ 13.167242] [<ffffffffc02fb3d2>] hid_input_report+0x112/0x190 [hid]
[ 13.167282] [<ffffffffc0361cb2>] hid_irq_in+0xb2/0x250 [usbhid]
[ 13.167321] [<ffffffff815ffa33>] __usb_hcd_giveback_urb+0x83/0x130
[ 13.167358] [<ffffffff815ffbf3>] usb_hcd_giveback_urb+0x43/0x150
[ 13.167395] [<ffffffff8164115f>] handle_tx_event+0x22f/0x12b0
[ 13.167432] [<ffffffff81642496>] xhci_irq+0x2b6/0xa60
[ 13.167469] [<ffffffff81642c51>] xhci_msi_irq+0x11/0x20
[ 13.167506] [<ffffffff810f1291>] handle_irq_event_percpu+0x41/0x500
[ 13.167543] [<ffffffff810f1791>] handle_irq_event+0x41/0x70
[ 13.167579] [<ffffffff810f460f>] handle_edge_irq+0x7f/0x120
[ 13.167616] [<ffffffff81020a92>] handle_irq+0x22/0x40
[ 13.167652] [<ffffffff81853013>] do_IRQ+0x53/0x100
[ 13.167689] [<ffffffff81850cf2>] ret_from_intr+0x0/0x1a
[ 13.167726] [<ffffffff8169f337>] cpuidle_enter+0x17/0x20
[ 13.167849] [<ffffffff810d01f1>] cpu_idle_loop+0x401/0x4e0
[ 13.167886] [<ffffffff810d032b>] cpu_startup_entry+0x5b/0x60
[ 13.167923] [<ffffffff81832b5d>] rest_init+0x13d/0x150
[ 13.167960] [<ffffffff81f5a112>] start_kernel+0x4aa/0x4b7
[ 13.167997] [<ffffffff81f595ee>] x86_64_start_reservations+0x2a/0x2c
[ 13.168033] [<ffffffff81f59733>] x86_64_start_kernel+0x143/0x152
[ 13.168070]
[ 13.168088]
[ 13.168088] stack backtrace:
[ 13.168107] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.17.0-999-generic #201409212205
[ 13.168126] Hardware name: MSI MS-7924/Z97M-G43(MS-7924), BIOS V1.5 07/22/2014
[ 13.168144] ffffffff81e1d4c0 ffff88041fa039b8 ffffffff8184569f 0000000000000000
[ 13.168234] ffffffff82be5960 ffff88041fa03a08 ffffffff8183e1b2 ffff88041fa03a30
[ 13.168324] ffffffff81cbf66c ffff88041fa03a1c 0000000000000000 ffffffff81e1dd58
[ 13.168415] Call Trace:
[ 13.168434] <IRQ> [<ffffffff8184569f>] dump_stack+0x4e/0x68
[ 13.168475] [<ffffffff8183e1b2>] print_irq_inversion_bug.part.37+0x1ae/0x1bd
[ 13.168496] [<ffffffff810d9a29>] check_usage_forwards+0x169/0x170
[ 13.168517] [<ffffffff810d98c0>] ? check_usage_backwards+0x170/0x170
[ 13.168538] [<ffffffff810db371>] mark_lock+0x1a1/0x2a0
[ 13.168559] [<ffffffff810dc0fd>] __lock_acquire+0x63d/0xaf0
[ 13.168582] [<ffffffffc02fafcd>] ? hid_input_field+0x11d/0x250 [hid]
[ 13.168607] [<ffffffff810dcd66>] lock_acquire+0xd6/0x2e0
[ 13.168628] [<ffffffff81650415>] ? input_event+0x45/0x70
[ 13.168648] [<ffffffff8184fae1>] _raw_spin_lock_irqsave+0x51/0x70
[ 13.168669] [<ffffffff81650415>] ? input_event+0x45/0x70
[ 13.168691] [<ffffffffc02fafcd>] ? hid_input_field+0x11d/0x250 [hid]
[ 13.168716] [<ffffffff81650415>] input_event+0x45/0x70
[ 13.168738] [<ffffffffc02fd0ff>] hidinput_report_event+0x3f/0x50 [hid]
[ 13.168852] [<ffffffffc02fb248>] hid_report_raw_event+0x148/0x1c0 [hid]
[ 13.168879] [<ffffffffc02fb3d2>] hid_input_report+0x112/0x190 [hid]
[ 13.168905] [<ffffffffc0361cb2>] hid_irq_in+0xb2/0x250 [usbhid]
[ 13.168931] [<ffffffff815ffa33>] __usb_hcd_giveback_urb+0x83/0x130
[ 13.168951] [<ffffffff815ffbf3>] usb_hcd_giveback_urb+0x43/0x150
[ 13.168972] [<ffffffff8164115f>] handle_tx_event+0x22f/0x12b0
[ 13.168992] [<ffffffff8164220c>] ? xhci_irq+0x2c/0xa60
[ 13.169013] [<ffffffff81642496>] xhci_irq+0x2b6/0xa60
[ 13.169034] [<ffffffff81642c51>] xhci_msi_irq+0x11/0x20
[ 13.169055] [<ffffffff810f1291>] handle_irq_event_percpu+0x41/0x500
[ 13.169075] [<ffffffff810f1791>] handle_irq_event+0x41/0x70
[ 13.169096] [<ffffffff810f45ae>] ? handle_edge_irq+0x1e/0x120
[ 13.169117] [<ffffffff810f460f>] handle_edge_irq+0x7f/0x120
[ 13.169137] [<ffffffff81020a92>] handle_irq+0x22/0x40
[ 13.169158] [<ffffffff81853013>] do_IRQ+0x53/0x100
[ 13.169178] [<ffffffff81850cf2>] common_interrupt+0x72/0x72
[ 13.169198] <EOI> [<ffffffff8169eff5>] ? cpuidle_enter_state+0x75/0x300
[ 13.169240] [<ffffffff8169efee>] ? cpuidle_enter_state+0x6e/0x300
[ 13.169260] [<ffffffff8169f337>] cpuidle_enter+0x17/0x20
[ 13.169280] [<ffffffff810d01f1>] cpu_idle_loop+0x401/0x4e0
[ 13.169301] [<ffffffff810d032b>] cpu_startup_entry+0x5b/0x60
[ 13.169322] [<ffffffff81832b5d>] rest_init+0x13d/0x150
[ 13.169342] [<ffffffff81832a25>] ? rest_init+0x5/0x150
[ 13.169363] [<ffffffff81f81c95>] ? ftrace_init+0xc6/0x159
[ 13.169383] [<ffffffff81f5a112>] start_kernel+0x4aa/0x4b7
[ 13.169404] [<ffffffff81f59a58>] ? set_init_arg+0x55/0x55
[ 13.169424] [<ffffffff81f59120>] ? early_idt_handlers+0x120/0x120
[ 13.169445] [<ffffffff81f595ee>] x86_64_start_reservations+0x2a/0x2c
[ 13.169466] [<ffffffff81f59733>] x86_64_start_kernel+0x143/0x152



I also once saw "INFO: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected" from send_sigio which might be related to this case so pasting it also here:
[ 8.638031] ======================================================
[ 8.638032] [ INFO: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected ]
[ 8.638034] 3.17.0-031700rc3-generic #201409031132 Not tainted
[ 8.638034] ------------------------------------------------------
[ 8.638036] Xorg/1171 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
[ 8.638037] (tasklist_lock){.+.+..}, at: [<ffffffff812342d5>] send_sigio+0x55/0x1d0
[ 8.638043]
[ 8.638043] and this task is already holding:
[ 8.638044] (&f->f_owner.lock){......}, at: [<ffffffff812342aa>] send_sigio+0x2a/0x1d0
[ 8.638047] which would create a new lock dependency:
[ 8.638047] (&f->f_owner.lock){......} -> (tasklist_lock){.+.+..}
[ 8.638051]
[ 8.638051] but this new dependency connects a HARDIRQ-irq-safe lock:
[ 8.638052] (&(&dev->event_lock)->rlock#2){-.....}
[ 8.638052] ... which became HARDIRQ-irq-safe at:
[ 8.638054] [<ffffffff810d3c1d>] __lock_acquire+0x66d/0xb50
[ 8.638057] [<ffffffff810d48f9>] lock_acquire+0xa9/0x200
[ 8.638059] [<ffffffff81833e01>] _raw_spin_lock_irqsave+0x51/0x70
[ 8.638063] [<ffffffff8162f7c5>] input_event+0x45/0x70
[ 8.638065] [<ffffffffc053e07f>] hidinput_report_event+0x3f/0x50 [hid]
[ 8.638072] [<ffffffffc053c1d8>] hid_report_raw_event+0x148/0x1c0 [hid]
[ 8.638075] [<ffffffffc053c362>] hid_input_report+0x112/0x190 [hid]
[ 8.638077] [<ffffffffc05a2c3c>] hid_irq_in+0x8c/0x210 [usbhid]
[ 8.638079] [<ffffffff815e0a73>] __usb_hcd_giveback_urb+0x83/0x130
[ 8.638082] [<ffffffff815e0c2f>] usb_hcd_giveback_urb+0x3f/0x140
[ 8.638084] [<ffffffff816207cf>] handle_tx_event+0x22f/0x12b0
[ 8.638087] [<ffffffff81621b06>] xhci_irq+0x2b6/0xa60
[ 8.638089] [<ffffffff816222c1>] xhci_msi_irq+0x11/0x20
[ 8.638091] [<ffffffff810e7e8e>] handle_irq_event_percpu+0x3e/0x340
[ 8.638094] [<ffffffff810e81cd>] handle_irq_event+0x3d/0x60
[ 8.638096] [<ffffffff810eafef>] handle_edge_irq+0x7f/0x120
[ 8.638097] [<ffffffff8101c85e>] handle_irq+0x1e/0x30
[ 8.638101] [<ffffffff8183738f>] do_IRQ+0x4f/0xf0
[ 8.638103] [<ffffffff81835072>] ret_from_intr+0x0/0x1a
[ 8.638105] [<ffffffff813f490d>] radix_tree_lookup+0xd/0x10
[ 8.638108] [<ffffffff8119e0da>] page_cache_next_hole+0x3a/0x50
[ 8.638110] [<ffffffff811acfd4>] ondemand_readahead+0x334/0x470
[ 8.638112] [<ffffffff811ad190>] page_cache_async_readahead+0x80/0xa0
[ 8.638114] [<ffffffff811a13d3>] filemap_fault+0x303/0x450
[ 8.638116] [<ffffffff811cbf59>] __do_fault+0x39/0x90
[ 8.638118] [<ffffffff811ce7df>] do_read_fault.isra.49+0x20f/0x2f0
[ 8.638119] [<ffffffff811d0618>] handle_mm_fault+0x7b8/0x10d0
[ 8.638121] [<ffffffff81066fe4>] __do_page_fault+0x1d4/0x5a0
[ 8.638123] [<ffffffff810673e1>] do_page_fault+0x31/0x70
[ 8.638124] [<ffffffff81836568>] page_fault+0x28/0x30
[ 8.638126]
[ 8.638126] to a HARDIRQ-irq-unsafe lock:
[ 8.638127] (&(&p->alloc_lock)->rlock){+.+...}
[ 8.638127] ... which became HARDIRQ-irq-unsafe at:
[ 8.638129] ... [<ffffffff810d3ae8>] __lock_acquire+0x538/0xb50
[ 8.638131] [<ffffffff810d48f9>] lock_acquire+0xa9/0x200
[ 8.638132] [<ffffffff818334e9>] _raw_spin_lock+0x39/0x50
[ 8.638135] [<ffffffff81227f0a>] __set_task_comm+0x2a/0x150
[ 8.638138] [<ffffffff810a15c0>] kthreadd+0x30/0x220
[ 8.638140] [<ffffffff818342bc>] ret_from_fork+0x7c/0xb0
[ 8.638143]
[ 8.638143] other info that might help us debug this:
[ 8.638143]
[ 8.638144] Chain exists of:
[ 8.638144] &(&dev->event_lock)->rlock#2 --> &f->f_owner.lock --> &(&p->alloc_lock)->rlock
[ 8.638144]
[ 8.638147] Possible interrupt unsafe locking scenario:
[ 8.638147]
[ 8.638148] CPU0 CPU1
[ 8.638148] ---- ----
[ 8.638149] lock(&(&p->alloc_lock)->rlock);
[ 8.638150] local_irq_disable();
[ 8.638151] lock(&(&dev->event_lock)->rlock#2);
[ 8.638152] lock(&f->f_owner.lock);
[ 8.638154] <Interrupt>
[ 8.638154] lock(&(&dev->event_lock)->rlock#2);
[ 8.638156]
[ 8.638156] *** DEADLOCK ***
[ 8.638156]
[ 8.638157] 9 locks held by Xorg/1171:
[ 8.638158] #0: (&evdev->mutex){+.+...}, at: [<ffffffff8163486d>] evdev_write+0x8d/0x220
[ 8.638161] #1: (&(&dev->event_lock)->rlock#2){-.....}, at: [<ffffffff8162f84e>] input_inject_event+0x5e/0x230
[ 8.638165] #2: (rcu_read_lock){......}, at: [<ffffffff8162f835>] input_inject_event+0x45/0x230
[ 8.638168] #3: (rcu_read_lock){......}, at: [<ffffffff8162e6e5>] input_pass_values.part.6+0x5/0x370
[ 8.638171] #4: (rcu_read_lock){......}, at: [<ffffffff81634a05>] evdev_events+0x5/0x2f0
[ 8.638174] #5: (&(&client->buffer_lock)->rlock){......}, at: [<ffffffff81632fd3>] evdev_pass_values+0x63/0x1c0
[ 8.638177] #6: (rcu_read_lock){......}, at: [<ffffffff81234471>] kill_fasync+0x21/0x2a0
[ 8.638180] #7: (&(&new->fa_lock)->rlock){......}, at: [<ffffffff812344ee>] kill_fasync+0x9e/0x2a0
[ 8.638183] #8: (&f->f_owner.lock){......}, at: [<ffffffff812342aa>] send_sigio+0x2a/0x1d0
[ 8.638186]
[ 8.638186] the dependencies between HARDIRQ-irq-safe lock and the holding lock:
[ 8.638189] -> (&(&dev->event_lock)->rlock#2){-.....} ops: 134 {
[ 8.638192] IN-HARDIRQ-W at:
[ 8.638193] [<ffffffff810d3c1d>] __lock_acquire+0x66d/0xb50
[ 8.638195] [<ffffffff810d48f9>] lock_acquire+0xa9/0x200
[ 8.638197] [<ffffffff81833e01>] _raw_spin_lock_irqsave+0x51/0x70
[ 8.638199] [<ffffffff8162f7c5>] input_event+0x45/0x70
[ 8.638201] [<ffffffffc053e07f>] hidinput_report_event+0x3f/0x50 [hid]
[ 8.638204] [<ffffffffc053c1d8>] hid_report_raw_event+0x148/0x1c0 [hid]
[ 8.638207] [<ffffffffc053c362>] hid_input_report+0x112/0x190 [hid]
[ 8.638209] [<ffffffffc05a2c3c>] hid_irq_in+0x8c/0x210 [usbhid]
[ 8.638211] [<ffffffff815e0a73>] __usb_hcd_giveback_urb+0x83/0x130
[ 8.638213] [<ffffffff815e0c2f>] usb_hcd_giveback_urb+0x3f/0x140
[ 8.638215] [<ffffffff816207cf>] handle_tx_event+0x22f/0x12b0
[ 8.638218] [<ffffffff81621b06>] xhci_irq+0x2b6/0xa60
[ 8.638219] [<ffffffff816222c1>] xhci_msi_irq+0x11/0x20
[ 8.638221] [<ffffffff810e7e8e>] handle_irq_event_percpu+0x3e/0x340
[ 8.638224] [<ffffffff810e81cd>] handle_irq_event+0x3d/0x60
[ 8.638226] [<ffffffff810eafef>] handle_edge_irq+0x7f/0x120
[ 8.638228] [<ffffffff8101c85e>] handle_irq+0x1e/0x30
[ 8.638231] [<ffffffff8183738f>] do_IRQ+0x4f/0xf0
[ 8.638232] [<ffffffff81835072>] ret_from_intr+0x0/0x1a
[ 8.638234] [<ffffffff813f490d>] radix_tree_lookup+0xd/0x10
[ 8.638237] [<ffffffff8119e0da>] page_cache_next_hole+0x3a/0x50
[ 8.638239] [<ffffffff811acfd4>] ondemand_readahead+0x334/0x470
[ 8.638241] [<ffffffff811ad190>] page_cache_async_readahead+0x80/0xa0
[ 8.638242] [<ffffffff811a13d3>] filemap_fault+0x303/0x450
[ 8.638244] [<ffffffff811cbf59>] __do_fault+0x39/0x90
[ 8.638246] [<ffffffff811ce7df>] do_read_fault.isra.49+0x20f/0x2f0
[ 8.638248] [<ffffffff811d0618>] handle_mm_fault+0x7b8/0x10d0
[ 8.638250] [<ffffffff81066fe4>] __do_page_fault+0x1d4/0x5a0
[ 8.638251] [<ffffffff810673e1>] do_page_fault+0x31/0x70
[ 8.638252] [<ffffffff81836568>] page_fault+0x28/0x30
[ 8.638254] INITIAL USE at:
[ 8.638255] [<ffffffff810d38f4>] __lock_acquire+0x344/0xb50
[ 8.638257] [<ffffffff810d48f9>] lock_acquire+0xa9/0x200
[ 8.638259] [<ffffffff81833e01>] _raw_spin_lock_irqsave+0x51/0x70
[ 8.638261] [<ffffffff8162f7c5>] input_event+0x45/0x70
[ 8.638263] [<ffffffffc01a1edb>] snd_jack_report+0xbb/0xe0 [snd]
[ 8.638270] [<ffffffffc076a2f1>] __snd_hda_jack_add_kctl+0x151/0x160 [snd_hda_codec]
[ 8.638276] [<ffffffffc076a314>] snd_hda_jack_add_kctl+0x14/0x20 [snd_hda_codec]
[ 8.638280] [<ffffffffc04d36e4>] generic_hdmi_build_jack+0xd4/0x150 [snd_hda_codec_hdmi]
[ 8.638282] [<ffffffffc04d50c6>] generic_hdmi_build_controls+0x46/0x210 [snd_hda_codec_hdmi]
[ 8.638284] [<ffffffffc07693d5>] snd_hda_codec_build_controls+0x1c5/0x220 [snd_hda_codec]
[ 8.638288] [<ffffffffc0769473>] snd_hda_build_controls+0x43/0xa0 [snd_hda_codec]
[ 8.638291] [<ffffffffc035d365>] azx_mixer_create+0x15/0x20 [snd_hda_controller]
[ 8.638294] [<ffffffffc0372751>] azx_probe_continue+0x361/0x710 [snd_hda_intel]
[ 8.638296] [<ffffffffc0372b95>] azx_probe_work+0x15/0x20 [snd_hda_intel]
[ 8.638298] [<ffffffff8109a5f3>] process_one_work+0x1e3/0x650
[ 8.638300] [<ffffffff8109ab81>] worker_thread+0x121/0x490
[ 8.638301] [<ffffffff810a0adc>] kthread+0xfc/0x120
[ 8.638303] [<ffffffff818342bc>] ret_from_fork+0x7c/0xb0
[ 8.638305] }
[ 8.638305] ... key at: [<ffffffff82eae054>] __key.28093+0x0/0x8
[ 8.638308] ... acquired at:
[ 8.638308] [<ffffffff810d39c8>] __lock_acquire+0x418/0xb50
[ 8.638311] [<ffffffff810d48f9>] lock_acquire+0xa9/0x200
[ 8.638312] [<ffffffff8183382c>] _raw_read_lock+0x3c/0x50
[ 8.638314] [<ffffffffc019d7cb>] snd_ctl_notify+0x4b/0x1d0 [snd]
[ 8.638318] [<ffffffffc01a1be4>] snd_kctl_jack_report+0x24/0x30 [snd]
[ 8.638321] [<ffffffffc076a040>] snd_hda_jack_report_sync+0xc0/0xe0 [snd_hda_codec]
[ 8.638327] [<ffffffffc04d4f32>] jack_callback+0x82/0x90 [snd_hda_codec_hdmi]
[ 8.638329] [<ffffffffc04d4feb>] hdmi_unsol_event+0xab/0x140 [snd_hda_codec_hdmi]
[ 8.638330] [<ffffffffc0760187>] process_unsol_events+0x67/0x80 [snd_hda_codec]
[ 8.638333] [<ffffffff8109a5f3>] process_one_work+0x1e3/0x650
[ 8.638334] [<ffffffff8109ab81>] worker_thread+0x121/0x490
[ 8.638336] [<ffffffff810a0adc>] kthread+0xfc/0x120
[ 8.638337] [<ffffffff818342bc>] ret_from_fork+0x7c/0xb0
[ 8.638339]
[ 8.638340] -> (&(&client->buffer_lock)->rlock){......} ops: 12 {
[ 8.638342] INITIAL USE at:
[ 8.638343] [<ffffffff810d38f4>] __lock_acquire+0x344/0xb50
[ 8.638345] [<ffffffff810d48f9>] lock_acquire+0xa9/0x200
[ 8.638346] [<ffffffff818334e9>] _raw_spin_lock+0x39/0x50
[ 8.638348] [<ffffffff81632fd3>] evdev_pass_values+0x63/0x1c0
[ 8.638350] [<ffffffff81634bd3>] evdev_events+0x1d3/0x2f0
[ 8.638352] [<ffffffff8162ba77>] input_to_handler+0x97/0xf0
[ 8.638354] [<ffffffff8162e9ac>] input_pass_values.part.6+0x2cc/0x370
[ 8.638355] [<ffffffff8162f361>] input_handle_event+0x121/0x540
[ 8.638357] [<ffffffff8162f7d9>] input_event+0x59/0x70
[ 8.638359] [<ffffffffc01a1ef0>] snd_jack_report+0xd0/0xe0 [snd]
[ 8.638362] [<ffffffffc076a058>] snd_hda_jack_report_sync+0xd8/0xe0 [snd_hda_codec]
[ 8.638366] [<ffffffffc04d4f32>] jack_callback+0x82/0x90 [snd_hda_codec_hdmi]
[ 8.638367] [<ffffffffc04d4feb>] hdmi_unsol_event+0xab/0x140 [snd_hda_codec_hdmi]
[ 8.638369] [<ffffffffc0760187>] process_unsol_events+0x67/0x80 [snd_hda_codec]
[ 8.638372] [<ffffffff8109a5f3>] process_one_work+0x1e3/0x650
[ 8.638373] [<ffffffff8109ab81>] worker_thread+0x121/0x490
[ 8.638374] [<ffffffff810a0adc>] kthread+0xfc/0x120
[ 8.638376] [<ffffffff818342bc>] ret_from_fork+0x7c/0xb0
[ 8.638378] }
[ 8.638378] ... key at: [<ffffffff82eae118>] __key.29718+0x0/0x8
[ 8.638380] ... acquired at:
[ 8.638381] [<ffffffff810d39c8>] __lock_acquire+0x418/0xb50
[ 8.638383] [<ffffffff810d48f9>] lock_acquire+0xa9/0x200
[ 8.638384] [<ffffffff81833e01>] _raw_spin_lock_irqsave+0x51/0x70
[ 8.638386] [<ffffffff814170e2>] __percpu_counter_add+0x42/0x80
[ 8.638388] [<ffffffff812a77d6>] ext4_claim_free_clusters+0x36/0x40
[ 8.638390] [<ffffffff812ea133>] ext4_mb_new_blocks+0xa3/0x760
[ 8.638392] [<ffffffff812dd5a6>] ext4_ext_map_blocks+0x676/0x13c0
[ 8.638394] [<ffffffff812b0751>] ext4_map_blocks+0x151/0x500
[ 8.638395] [<ffffffff812d77ef>] ext4_alloc_file_blocks.isra.39+0xcf/0x2b0
[ 8.638397] [<ffffffff812df4af>] ext4_fallocate+0xef/0xb80
[ 8.638398] [<ffffffff8121e8d7>] do_fallocate+0x127/0x1c0
[ 8.638400] [<ffffffff8121e9b4>] SyS_fallocate+0x44/0x70
[ 8.638402] [<ffffffff8183436d>] system_call_fastpath+0x1a/0x1f
[ 8.638404]
[ 8.638405] -> (&(&new->fa_lock)->rlock){......} ops: 1 {
[ 8.638407] INITIAL USE at:
[ 8.638408] [<ffffffff810d38f4>] __lock_acquire+0x344/0xb50
[ 8.638410] [<ffffffff810d48f9>] lock_acquire+0xa9/0x200
[ 8.638411] [<ffffffff81833e01>] _raw_spin_lock_irqsave+0x51/0x70
[ 8.638413] [<ffffffff812344ee>] kill_fasync+0x9e/0x2a0
[ 8.638415] [<ffffffff81633063>] evdev_pass_values+0xf3/0x1c0
[ 8.638417] [<ffffffff81634bd3>] evdev_events+0x1d3/0x2f0
[ 8.638419] [<ffffffff8162ba77>] input_to_handler+0x97/0xf0
[ 8.638420] [<ffffffff8162e9ac>] input_pass_values.part.6+0x2cc/0x370
[ 8.638422] [<ffffffff8162f361>] input_handle_event+0x121/0x540
[ 8.638424] [<ffffffff8162f988>] input_inject_event+0x198/0x230
[ 8.638425] [<ffffffff8163497c>] evdev_write+0x19c/0x220
[ 8.638427] [<ffffffff812208f7>] vfs_write+0xb7/0x1f0
[ 8.638428] [<ffffffff81221359>] SyS_write+0x49/0xb0
[ 8.638430] [<ffffffff8183436d>] system_call_fastpath+0x1a/0x1f
[ 8.638432] }
[ 8.638432] ... key at: [<ffffffff82e84274>] __key.36822+0x0/0x8
[ 8.638435] ... acquired at:
[ 8.638436] [<ffffffff810d39c8>] __lock_acquire+0x418/0xb50
[ 8.638437] [<ffffffff810d48f9>] lock_acquire+0xa9/0x200
[ 8.638439] [<ffffffff8183382c>] _raw_read_lock+0x3c/0x50
[ 8.638441] [<ffffffff812342aa>] send_sigio+0x2a/0x1d0
[ 8.638442] [<ffffffff8123451c>] kill_fasync+0xcc/0x2a0
[ 8.638444] [<ffffffff81633063>] evdev_pass_values+0xf3/0x1c0
[ 8.638445] [<ffffffff81634bd3>] evdev_events+0x1d3/0x2f0
[ 8.638447] [<ffffffff8162ba77>] input_to_handler+0x97/0xf0
[ 8.638449] [<ffffffff8162e9ac>] input_pass_values.part.6+0x2cc/0x370
[ 8.638450] [<ffffffff8162f361>] input_handle_event+0x121/0x540
[ 8.638452] [<ffffffff8162f988>] input_inject_event+0x198/0x230
[ 8.638453] [<ffffffff8163497c>] evdev_write+0x19c/0x220
[ 8.638455] [<ffffffff812208f7>] vfs_write+0xb7/0x1f0
[ 8.638456] [<ffffffff81221359>] SyS_write+0x49/0xb0
[ 8.638458] [<ffffffff8183436d>] system_call_fastpath+0x1a/0x1f
[ 8.638459]
[ 8.638460] -> (&f->f_owner.lock){......} ops: 8 {
[ 8.638462] INITIAL USE at:
[ 8.638463] [<ffffffff810d38f4>] __lock_acquire+0x344/0xb50
[ 8.638465] [<ffffffff810d48f9>] lock_acquire+0xa9/0x200
[ 8.638466] [<ffffffff81833ba5>] _raw_write_lock_irq+0x45/0x60
[ 8.638468] [<ffffffff81233687>] __f_setown+0x47/0xe0
[ 8.638470] [<ffffffff812337bd>] f_setown+0x7d/0x120
[ 8.638471] [<ffffffff81233f01>] SyS_fcntl+0x341/0x6c0
[ 8.638473] [<ffffffff8183436d>] system_call_fastpath+0x1a/0x1f
[ 8.638475] }
[ 8.638475] ... key at: [<ffffffff82e83920>] __key.31233+0x0/0x8
[ 8.638477] ... acquired at:
[ 8.638478] [<ffffffff810d1a7a>] check_irq_usage+0x4a/0xc0
[ 8.638479] [<ffffffff810d2324>] validate_chain.isra.40+0x834/0x10e0
[ 8.638481] [<ffffffff810d39c8>] __lock_acquire+0x418/0xb50
[ 8.638483] [<ffffffff810d48f9>] lock_acquire+0xa9/0x200
[ 8.638484] [<ffffffff8183382c>] _raw_read_lock+0x3c/0x50
[ 8.638486] [<ffffffff812342d5>] send_sigio+0x55/0x1d0
[ 8.638487] [<ffffffff8123451c>] kill_fasync+0xcc/0x2a0
[ 8.638489] [<ffffffff81633063>] evdev_pass_values+0xf3/0x1c0
[ 8.638490] [<ffffffff81634bd3>] evdev_events+0x1d3/0x2f0
[ 8.638492] [<ffffffff8162ba77>] input_to_handler+0x97/0xf0
[ 8.638494] [<ffffffff8162e9ac>] input_pass_values.part.6+0x2cc/0x370
[ 8.638495] [<ffffffff8162f361>] input_handle_event+0x121/0x540
[ 8.638497] [<ffffffff8162f988>] input_inject_event+0x198/0x230
[ 8.638498] [<ffffffff8163497c>] evdev_write+0x19c/0x220
[ 8.638500] [<ffffffff812208f7>] vfs_write+0xb7/0x1f0
[ 8.638501] [<ffffffff81221359>] SyS_write+0x49/0xb0
[ 8.638503] [<ffffffff8183436d>] system_call_fastpath+0x1a/0x1f
[ 8.638504]
[ 8.638505]
[ 8.638505] the dependencies between the lock to be acquired and HARDIRQ-irq-unsafe lock:
[ 8.638508] -> (&(&p->alloc_lock)->rlock){+.+...} ops: 28696 {
[ 8.638511] HARDIRQ-ON-W at:
[ 8.638512] [<ffffffff810d3ae8>] __lock_acquire+0x538/0xb50
[ 8.638513] [<ffffffff810d48f9>] lock_acquire+0xa9/0x200
[ 8.638515] [<ffffffff818334e9>] _raw_spin_lock+0x39/0x50
[ 8.638517] [<ffffffff81227f0a>] __set_task_comm+0x2a/0x150
[ 8.638518] [<ffffffff810a15c0>] kthreadd+0x30/0x220
[ 8.638520] [<ffffffff818342bc>] ret_from_fork+0x7c/0xb0
[ 8.638522] SOFTIRQ-ON-W at:
[ 8.638523] [<ffffffff810d38a3>] __lock_acquire+0x2f3/0xb50
[ 8.638524] [<ffffffff810d48f9>] lock_acquire+0xa9/0x200
[ 8.638526] [<ffffffff818334e9>] _raw_spin_lock+0x39/0x50
[ 8.638528] [<ffffffff81227f0a>] __set_task_comm+0x2a/0x150
[ 8.638530] [<ffffffff810a15c0>] kthreadd+0x30/0x220
[ 8.638531] [<ffffffff818342bc>] ret_from_fork+0x7c/0xb0
[ 8.638533] INITIAL USE at:
[ 8.638534] [<ffffffff810d38f4>] __lock_acquire+0x344/0xb50
[ 8.638535] [<ffffffff810d48f9>] lock_acquire+0xa9/0x200
[ 8.638537] [<ffffffff818334e9>] _raw_spin_lock+0x39/0x50
[ 8.638539] [<ffffffff81227f0a>] __set_task_comm+0x2a/0x150
[ 8.638541] [<ffffffff810a15c0>] kthreadd+0x30/0x220
[ 8.638542] [<ffffffff818342bc>] ret_from_fork+0x7c/0xb0
[ 8.638544] }
[ 8.638544] ... key at: [<ffffffff82119008>] __key.51772+0x0/0x8
[ 8.638546] ... acquired at:
[ 8.638547] [<ffffffff810d39c8>] __lock_acquire+0x418/0xb50
[ 8.638548] [<ffffffff810d48f9>] lock_acquire+0xa9/0x200
[ 8.638550] [<ffffffff818334e9>] _raw_spin_lock+0x39/0x50
[ 8.638552] [<ffffffff81093eeb>] do_prlimit+0x9b/0x200
[ 8.638554] [<ffffffff8109407a>] SyS_getrlimit+0x2a/0x70
[ 8.638556] [<ffffffff8183436d>] system_call_fastpath+0x1a/0x1f
[ 8.638558]
[ 8.638558] -> (tasklist_lock){.+.+..} ops: 26264 {
[ 8.638561] HARDIRQ-ON-R at:
[ 8.638562] [<ffffffff810d3881>] __lock_acquire+0x2d1/0xb50
[ 8.638563] [<ffffffff810d48f9>] lock_acquire+0xa9/0x200
[ 8.638565] [<ffffffff8183382c>] _raw_read_lock+0x3c/0x50
[ 8.638567] [<ffffffff8107d796>] do_wait+0xb6/0x340
[ 8.638568] [<ffffffff8107ed54>] SyS_wait4+0x64/0xe0
[ 8.638569] [<ffffffff8109500b>] wait_for_helper+0x4b/0x70
[ 8.638571] [<ffffffff818342bc>] ret_from_fork+0x7c/0xb0
[ 8.638573] SOFTIRQ-ON-R at:
[ 8.638574] [<ffffffff810d38a3>] __lock_acquire+0x2f3/0xb50
[ 8.638575] [<ffffffff810d48f9>] lock_acquire+0xa9/0x200
[ 8.638577] [<ffffffff8183382c>] _raw_read_lock+0x3c/0x50
[ 8.638579] [<ffffffff8107d796>] do_wait+0xb6/0x340
[ 8.638580] [<ffffffff8107ed54>] SyS_wait4+0x64/0xe0
[ 8.638581] [<ffffffff8109500b>] wait_for_helper+0x4b/0x70
[ 8.638583] [<ffffffff818342bc>] ret_from_fork+0x7c/0xb0
[ 8.638585] INITIAL USE at:
[ 8.638585] [<ffffffff810d38f4>] __lock_acquire+0x344/0xb50
[ 8.638587] [<ffffffff810d48f9>] lock_acquire+0xa9/0x200
[ 8.638589] [<ffffffff81833ba5>] _raw_write_lock_irq+0x45/0x60
[ 8.638591] [<ffffffff81078861>] copy_process.part.23+0xcf1/0x1e50
[ 8.638593] [<ffffffff81079b6e>] do_fork+0xce/0x750
[ 8.638594] [<ffffffff8107a216>] kernel_thread+0x26/0x30
[ 8.638596] [<ffffffff81817bb3>] rest_init+0x23/0x140
[ 8.638598] [<ffffffff81f590ee>] start_kernel+0x499/0x4a4
[ 8.638600] [<ffffffff81f585ee>] x86_64_start_reservations+0x2a/0x2c
[ 8.638602] [<ffffffff81f58733>] x86_64_start_kernel+0x143/0x152
[ 8.638604] }
[ 8.638604] ... key at: [<ffffffff81e0f058>] tasklist_lock+0x18/0x40
[ 8.638607] ... acquired at:
[ 8.638608] [<ffffffff810d1a7a>] check_irq_usage+0x4a/0xc0
[ 8.638610] [<ffffffff810d2324>] validate_chain.isra.40+0x834/0x10e0
[ 8.638611] [<ffffffff810d39c8>] __lock_acquire+0x418/0xb50
[ 8.638613] [<ffffffff810d48f9>] lock_acquire+0xa9/0x200
[ 8.638614] [<ffffffff8183382c>] _raw_read_lock+0x3c/0x50
[ 8.638616] [<ffffffff812342d5>] send_sigio+0x55/0x1d0
[ 8.638618] [<ffffffff8123451c>] kill_fasync+0xcc/0x2a0
[ 8.638619] [<ffffffff81633063>] evdev_pass_values+0xf3/0x1c0
[ 8.638621] [<ffffffff81634bd3>] evdev_events+0x1d3/0x2f0
[ 8.638623] [<ffffffff8162ba77>] input_to_handler+0x97/0xf0
[ 8.638624] [<ffffffff8162e9ac>] input_pass_values.part.6+0x2cc/0x370
[ 8.638626] [<ffffffff8162f361>] input_handle_event+0x121/0x540
[ 8.638628] [<ffffffff8162f988>] input_inject_event+0x198/0x230
[ 8.638629] [<ffffffff8163497c>] evdev_write+0x19c/0x220
[ 8.638631] [<ffffffff812208f7>] vfs_write+0xb7/0x1f0
[ 8.638632] [<ffffffff81221359>] SyS_write+0x49/0xb0
[ 8.638633] [<ffffffff8183436d>] system_call_fastpath+0x1a/0x1f
[ 8.638635]
[ 8.638636]
[ 8.638636] stack backtrace:
[ 8.638638] CPU: 0 PID: 1171 Comm: Xorg Not tainted 3.17.0-031700rc3-generic #201409031132
[ 8.638639] Hardware name: MSI MS-7924/Z97M-G43(MS-7924), BIOS V1.5 07/22/2014
[ 8.638640] ffffffff8285faa0 ffff880404003958 ffffffff81829c6a ffffffff82bd77a0
[ 8.638642] ffff880404003a58 ffffffff810d1a1a 0000000000000000 ffff880400000000
[ 8.638644] ffffffff00000001 ffff880404003ff8 ffffffff82c27d60 ffffffff82bd77a0
[ 8.638646] Call Trace:
[ 8.638650] [<ffffffff81829c6a>] dump_stack+0x4d/0x66
[ 8.638652] [<ffffffff810d1a1a>] check_usage+0x50a/0x520
[ 8.638655] [<ffffffff81119536>] ? is_module_text_address+0x16/0x30
[ 8.638657] [<ffffffff810d1a7a>] check_irq_usage+0x4a/0xc0
[ 8.638659] [<ffffffff810d2324>] validate_chain.isra.40+0x834/0x10e0
[ 8.638661] [<ffffffff810d39c8>] __lock_acquire+0x418/0xb50
[ 8.638663] [<ffffffff810d48f9>] lock_acquire+0xa9/0x200
[ 8.638665] [<ffffffff812342d5>] ? send_sigio+0x55/0x1d0
[ 8.638667] [<ffffffff8183382c>] _raw_read_lock+0x3c/0x50
[ 8.638668] [<ffffffff812342d5>] ? send_sigio+0x55/0x1d0
[ 8.638670] [<ffffffff812342d5>] send_sigio+0x55/0x1d0
[ 8.638671] [<ffffffff8123451c>] kill_fasync+0xcc/0x2a0
[ 8.638673] [<ffffffff81234471>] ? kill_fasync+0x21/0x2a0
[ 8.638675] [<ffffffff81633063>] evdev_pass_values+0xf3/0x1c0
[ 8.638677] [<ffffffff81634bd3>] evdev_events+0x1d3/0x2f0
[ 8.638679] [<ffffffff81634a05>] ? evdev_events+0x5/0x2f0
[ 8.638681] [<ffffffff8162ba77>] input_to_handler+0x97/0xf0
[ 8.638683] [<ffffffff8162e9ac>] input_pass_values.part.6+0x2cc/0x370
[ 8.638684] [<ffffffff8162e6e5>] ? input_pass_values.part.6+0x5/0x370
[ 8.638686] [<ffffffff8162f361>] input_handle_event+0x121/0x540
[ 8.638688] [<ffffffff8162f988>] input_inject_event+0x198/0x230
[ 8.638690] [<ffffffff8162f835>] ? input_inject_event+0x45/0x230
[ 8.638692] [<ffffffff8163497c>] evdev_write+0x19c/0x220
[ 8.638693] [<ffffffff812208f7>] vfs_write+0xb7/0x1f0
[ 8.638695] [<ffffffff81221359>] SyS_write+0x49/0xb0
[ 8.638697] [<ffffffff8183436d>] system_call_fastpath+0x1a/0x1f
--
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