Attachment 87373 Details for Bug 70334 – netconsole log

netconsole log

netconsole.log (text/plain), 19.09 KB, created by fangxun on 2013-10-10 07:40:26 UTC

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Creator: fangxun

Created: 2013-10-10 07:40:26 UTC

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patch

obsolete

>[  876.961477] Console: switching to colour VGA+ 80x25
>[  877.108611] 
>[  877.108611] ======================================================
>[  877.108612] [ INFO: possible circular locking dependency detected ]
>[  877.108613] 3.12.0-rc4_nightlytop_4e1044_debug_20131010_+ #673 Not tainted
>[  877.108613] -------------------------------------------------------
>[  877.108614] rmmod/15501 is trying to acquire lock:
>[  877.108619]  (s_active#114){++++.+}, at: [<ffffffff81188023>] sysfs_addrm_finish+0x2e/0x57
>[  877.108619] 
>[  877.108619] but task is already holding lock:
>[  877.108623]  ((fb_notifier_list).rwsem){++++.+}, at: [<ffffffff8105c3aa>] __blocking_notifier_call_chain+0x2e/0x5f
>[  877.108623] 
>[  877.108623] which lock already depends on the new lock.
>[  877.108623] 
>[  877.108623] 
>[  877.108623] the existing dependency chain (in reverse order) is:
>[  877.108625] 
>[  877.108625] -> #2 ((fb_notifier_list).rwsem){++++.+}:
>[  877.108627]        [<ffffffff81090e91>] lock_acquire+0xcc/0x106
>[  877.108630]        [<ffffffff817f7fb3>] down_read+0x39/0x4e
>[  877.108631]        [<ffffffff8105c3aa>] __blocking_notifier_call_chain+0x2e/0x5f
>[  877.108633]        [<ffffffff8105c3ef>] blocking_notifier_call_chain+0x14/0x16
>[  877.108635]        [<ffffffff81397e3b>] fb_notifier_call_chain+0x1b/0x1d
>[  877.108637]        [<ffffffff81399bdc>] register_framebuffer+0x237/0x2a0
>[  877.108640]        [<ffffffffa0057cb9>] drm_fb_helper_initial_config+0x393/0x445 [drm_kms_helper]
>[  877.108655]        [<ffffffffa00c7170>] intel_fbdev_initial_config+0x21/0x23 [i915]
>[  877.108660]        [<ffffffffa0075820>] i915_driver_load+0xc97/0xf07 [i915]
>[  877.108668]        [<ffffffffa000a3c7>] drm_dev_register+0x108/0x1d0 [drm]
>[  877.108673]        [<ffffffffa000bf6b>] drm_get_pci_dev+0xa5/0x12f [drm]
>[  877.108678]        [<ffffffffa00725f4>] i915_pci_probe+0x6d/0x76 [i915]
>[  877.108680]        [<ffffffff813884a2>] local_pci_probe+0x20/0x32
>[  877.108682]        [<ffffffff81388f40>] pci_device_probe+0xbf/0xe5
>[  877.108683]        [<ffffffff8141719a>] driver_probe_device+0x96/0x1a3
>[  877.108684]        [<ffffffff81417309>] __driver_attach+0x62/0x85
>[  877.108686]        [<ffffffff81415668>] bus_for_each_dev+0x5f/0x91
>[  877.108688]        [<ffffffff81416d1c>] driver_attach+0x1e/0x20
>[  877.108688]        [<ffffffff814168c5>] bus_add_driver+0xf9/0x245
>[  877.108690]        [<ffffffff814178f8>] driver_register+0x8c/0xc3
>[  877.108691]        [<ffffffff81389034>] __pci_register_driver+0x61/0x65
>[  877.108696]        [<ffffffffa000c080>] drm_pci_init+0x8b/0xf1 [drm]
>[  877.108697]        [<ffffffffa0118066>] 0xffffffffa0118066
>[  877.108699]        [<ffffffff81000271>] do_one_initcall+0x84/0x10f
>[  877.108701]        [<ffffffff8109b22b>] load_module+0x1a96/0x1d86
>[  877.108702]        [<ffffffff8109b5c2>] SyS_init_module+0xa7/0xb6
>[  877.108705]        [<ffffffff81801a12>] system_call_fastpath+0x16/0x1b
>[  877.108706] 
>[  877.108706] -> #1 (console_lock){+.+.+.}:
>[  877.108707]        [<ffffffff81090e91>] lock_acquire+0xcc/0x106
>[  877.108709]        [<ffffffff8107b4f6>] console_lock+0x5e/0x60
>[  877.108711]        [<ffffffff813f8eeb>] store_bind+0x1ea/0x21c
>[  877.108712]        [<ffffffff81412d74>] dev_attr_store+0x18/0x24
>[  877.108713]        [<ffffffff81186c6b>] sysfs_write_file+0xee/0x126
>[  877.108715]        [<ffffffff81125017>] vfs_write+0xcb/0x198
>[  877.108716]        [<ffffffff81125425>] SyS_write+0x4c/0x85
>[  877.108717]        [<ffffffff81801a12>] system_call_fastpath+0x16/0x1b
>[  877.108718] 
>[  877.108718] -> #0 (s_active#114){++++.+}:
>[  877.108720]        [<ffffffff8109021f>] __lock_acquire+0x108d/0x17fd
>[  877.108721]        [<ffffffff81090e91>] lock_acquire+0xcc/0x106
>[  877.108722]        [<ffffffff8118763a>] sysfs_deactivate+0x95/0xcc
>[  877.108723]        [<ffffffff81188023>] sysfs_addrm_finish+0x2e/0x57
>[  877.108724]        [<ffffffff811866c8>] sysfs_hash_and_remove+0x7b/0x8f
>[  877.108725]        [<ffffffff81186a9c>] sysfs_remove_file+0x34/0x3b
>[  877.108727]        [<ffffffff814136f1>] device_remove_file+0x17/0x19
>[  877.108728]        [<ffffffff813f747c>] do_unregister_con_driver+0x53/0xc2
>[  877.108730]        [<ffffffff813a59a9>] fbcon_event_notify+0x3a8/0x5f1
>[  877.108731]        [<ffffffff817fdfaa>] notifier_call_chain+0x37/0x61
>[  877.108733]        [<ffffffff8105c3c2>] __blocking_notifier_call_chain+0x46/0x5f
>[  877.108734]        [<ffffffff8105c3ef>] blocking_notifier_call_chain+0x14/0x16
>[  877.108736]        [<ffffffff81397e3b>] fb_notifier_call_chain+0x1b/0x1d
>[  877.108737]        [<ffffffff813997fa>] do_unregister_framebuffer+0xde/0xff
>[  877.108739]        [<ffffffff81399842>] unregister_framebuffer+0x27/0x40
>[  877.108750]        [<ffffffffa00c71a7>] intel_fbdev_fini+0x35/0x9c [i915]
>[  877.108755]        [<ffffffffa0075b79>] i915_driver_unload+0xe9/0x2ce [i915]
>[  877.108761]        [<ffffffffa0009e4f>] drm_dev_unregister+0x2d/0xc5 [drm]
>[  877.108765]        [<ffffffffa000a528>] drm_put_dev+0x54/0x60 [drm]
>[  877.108770]        [<ffffffffa007244d>] i915_pci_remove+0x1d/0x1f [i915]
>[  877.108771]        [<ffffffff81388e37>] pci_device_remove+0x2d/0x51
>[  877.108773]        [<ffffffff81416c76>] __device_release_driver+0x71/0xc7
>[  877.108774]        [<ffffffff814173f7>] driver_detach+0x8e/0xbf
>[  877.108775]        [<ffffffff81416a99>] bus_remove_driver+0x88/0xcb
>[  877.108776]        [<ffffffff8141798a>] driver_unregister+0x47/0x4d
>[  877.108777]        [<ffffffff81388f8a>] pci_unregister_driver+0x24/0x6d
>[  877.108782]        [<ffffffffa000bdc1>] drm_pci_exit+0x44/0x7d [drm]
>[  877.108793]        [<ffffffffa00d7b2b>] i915_exit+0x17/0x19 [i915]
>[  877.108794]        [<ffffffff8109962b>] SyS_delete_module+0x1a4/0x21e
>[  877.108796]        [<ffffffff81801a12>] system_call_fastpath+0x16/0x1b
>[  877.108796] 
>[  877.108796] other info that might help us debug this:
>[  877.108796] 
>[  877.108798] Chain exists of:
>[  877.108798]   s_active#114 --> console_lock --> (fb_notifier_list).rwsem
>[  877.108798] 
>[  877.108798]  Possible unsafe locking scenario:
>[  877.108798] 
>[  877.108798]        CPU0                    CPU1
>[  877.108799]        ----                    ----
>[  877.108799]   lock((fb_notifier_list).rwsem);
>[  877.108800]                                lock(console_lock);
>[  877.108801]                                lock((fb_notifier_list).rwsem);
>[  877.108801]   lock(s_active#114);
>[  877.108801] 
>[  877.108801]  *** DEADLOCK ***
>[  877.108801] 
>[  877.108802] 5 locks held by rmmod/15501:
>[  877.108804]  #0:  (&__lockdep_no_validate__){......}, at: [<ffffffff814173d8>] driver_detach+0x6f/0xbf
>[  877.108806]  #1:  (&__lockdep_no_validate__){......}, at: [<ffffffff814173e6>] driver_detach+0x7d/0xbf
>[  877.108808]  #2:  (registration_lock){+.+.+.}, at: [<ffffffff8139983a>] unregister_framebuffer+0x1f/0x40
>[  877.108810]  #3:  (console_lock){+.+.+.}, at: [<ffffffff813997ec>] do_unregister_framebuffer+0xd0/0xff
>[  877.108812]  #4:  ((fb_notifier_list).rwsem){++++.+}, at: [<ffffffff8105c3aa>] __blocking_notifier_call_chain+0x2e/0x5f
>[  877.108812] 
>[  877.108812] stack backtrace:
>[  877.108814] CPU: 2 PID: 15501 Comm: rmmod Not tainted 3.12.0-rc4_nightlytop_4e1044_debug_20131010_+ #673
>[  877.108815] Hardware name:                  /DH77EB, BIOS EBH7710H.86A.0062.2012.0329.1914 03/29/2012
>[  877.108817]  ffffffff8697f2e0 ffff8800d5063888 ffffffff817f3653 ffffffff8107ca0a
>[  877.108818]  ffffffff869b3b40 ffff8800d50638d8 ffffffff817eeb22 ffff8800d50638a8
>[  877.108819]  ffff8800da9f8000 0000000000000005 ffff8800da9f8790 0000000000000005
>[  877.108819] Call Trace:
>[  877.108821]  [<ffffffff817f3653>] dump_stack+0x46/0x58
>[  877.108823]  [<ffffffff8107ca0a>] ? vprintk_emit+0x427/0x48d
>[  877.108825]  [<ffffffff817eeb22>] print_circular_bug+0x2ad/0x2be
>[  877.108826]  [<ffffffff8109021f>] __lock_acquire+0x108d/0x17fd
>[  877.108828]  [<ffffffff81091875>] ? debug_check_no_locks_freed+0x128/0x13e
>[  877.108829]  [<ffffffff81090e91>] lock_acquire+0xcc/0x106
>[  877.108831]  [<ffffffff81188023>] ? sysfs_addrm_finish+0x2e/0x57
>[  877.108832]  [<ffffffff8118763a>] sysfs_deactivate+0x95/0xcc
>[  877.108833]  [<ffffffff81188023>] ? sysfs_addrm_finish+0x2e/0x57
>[  877.108834]  [<ffffffff81188023>] sysfs_addrm_finish+0x2e/0x57
>[  877.108836]  [<ffffffff811866c8>] sysfs_hash_and_remove+0x7b/0x8f
>[  877.108837]  [<ffffffff8111ed1d>] ? kfree+0xf9/0x16c
>[  877.108839]  [<ffffffff81186a9c>] sysfs_remove_file+0x34/0x3b
>[  877.108840]  [<ffffffff814136f1>] device_remove_file+0x17/0x19
>[  877.108841]  [<ffffffff813f747c>] do_unregister_con_driver+0x53/0xc2
>[  877.108843]  [<ffffffff813a59a9>] fbcon_event_notify+0x3a8/0x5f1
>[  877.108844]  [<ffffffff817fdfaa>] notifier_call_chain+0x37/0x61
>[  877.108846]  [<ffffffff8105c3c2>] __blocking_notifier_call_chain+0x46/0x5f
>[  877.108847]  [<ffffffff8105c3ef>] blocking_notifier_call_chain+0x14/0x16
>[  877.108849]  [<ffffffff81397e3b>] fb_notifier_call_chain+0x1b/0x1d
>[  877.108850]  [<ffffffff813997fa>] do_unregister_framebuffer+0xde/0xff
>[  877.108852]  [<ffffffff81399842>] unregister_framebuffer+0x27/0x40
>[  877.108862]  [<ffffffffa00c71a7>] intel_fbdev_fini+0x35/0x9c [i915]
>[  877.108868]  [<ffffffffa0075b79>] i915_driver_unload+0xe9/0x2ce [i915]
>[  877.108873]  [<ffffffffa0009e4f>] drm_dev_unregister+0x2d/0xc5 [drm]
>[  877.108878]  [<ffffffffa000a528>] drm_put_dev+0x54/0x60 [drm]
>[  877.108883]  [<ffffffffa007244d>] i915_pci_remove+0x1d/0x1f [i915]
>[  877.108884]  [<ffffffff81388e37>] pci_device_remove+0x2d/0x51
>[  877.108886]  [<ffffffff81416c76>] __device_release_driver+0x71/0xc7
>[  877.108887]  [<ffffffff814173f7>] driver_detach+0x8e/0xbf
>[  877.108888]  [<ffffffff81416a99>] bus_remove_driver+0x88/0xcb
>[  877.108890]  [<ffffffff8141798a>] driver_unregister+0x47/0x4d
>[  877.108891]  [<ffffffff81388f8a>] pci_unregister_driver+0x24/0x6d
>[  877.108897]  [<ffffffffa000bdc1>] drm_pci_exit+0x44/0x7d [drm]
>[  877.108908]  [<ffffffffa00d7b2b>] i915_exit+0x17/0x19 [i915]
>[  877.108909]  [<ffffffff8109962b>] SyS_delete_module+0x1a4/0x21e
>[  877.108911]  [<ffffffff8136d10e>] ? trace_hardirqs_on_thunk+0x3a/0x3f
>[  877.108913]  [<ffffffff81801a12>] system_call_fastpath+0x16/0x1b
>[  877.132011] drm_kms_helper: drm: unregistered panic notifier
>[  877.137402] [drm:gm45_get_vblank_counter], trying to get vblank count for disabled pipe B
>[  877.137677] [drm:gm45_get_vblank_counter], trying to get vblank count for disabled pipe C
>[  877.137971] vgaarb: device changed decodes: PCI:0000:00:02.0,olddecodes=io,decodes=io+mem:owns=io
>[  877.141122] [drm:intel_crtc_cursor_set], cursor off
>[  877.141262] [drm:intel_crtc_cursor_set], cursor off
>[  877.141400] [drm:intel_crtc_cursor_set], cursor off
>[  877.144311] [drm] Module unloaded
>[  877.188316] BUG: unable to handle kernel NULL pointer dereference at           (null)
>[  877.188551] IP: [<ffffffff8105046d>] __queue_work+0x135/0x274
>[  877.188688] PGD daa2d067 PUD 6131067 PMD 0 
>[  877.188893] Oops: 0000 [#1] SMP 
>[  877.189056] Modules linked in: netconsole configfs ip6table_filter ip6_tables ipv6 iptable_filter ip_tables ebtable_nat ebtables x_tables dm_mod snd_hda_codec_hdmi snd_hda_codec_realtek pcspkr i2c_i801 snd_hda_intel iTCO_wdt snd_hda_codec iTCO_vendor_support snd_hwdep snd_pcm lpc_ich snd_page_alloc mfd_core snd_timer snd soundcore ppdev parport_pc parport wmi acpi_cpufreq video button freq_table [last unloaded: drm]
>[  877.190845] CPU: 2 PID: 0 Comm: swapper/2 Not tainted 3.12.0-rc4_nightlytop_4e1044_debug_20131010_+ #673
>[  877.190983] Hardware name:                  /DH77EB, BIOS EBH7710H.86A.0062.2012.0329.1914 03/29/2012
>[  877.191120] task: ffff8802158edee0 ti: ffff8802158f0000 task.ti: ffff8802158f0000
>[  877.191254] RIP: 0010:[<ffffffff8105046d>]  [<ffffffff8105046d>] __queue_work+0x135/0x274
>[  877.191436] RSP: 0018:ffff88021f303db0  EFLAGS: 00010046
>[  877.191528] RAX: 0000000000000000 RBX: ffff8800daa8c800 RCX: 0000000000000000
>[  877.191621] RDX: 000000007fffffff RSI: 000000007fffffff RDI: ffff88020fc6b238
>[  877.191715] RBP: ffff88021f303df0 R08: 0000000000000002 R09: 0000000000000001
>[  877.191803] R10: 0000000000000002 R11: 0000000000000000 R12: ffff88020fc6b238
>[  877.191897] R13: 0000000000000000 R14: 000000000000ef20 R15: 0000000000000000
>[  877.191991] FS:  0000000000000000(0000) GS:ffff88021f300000(0000) knlGS:0000000000000000
>[  877.192127] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>[  877.192217] CR2: 0000000000000000 CR3: 00000000d52ad000 CR4: 00000000001407e0
>[  877.192309] Stack:
>[  877.192394]  0000000000000000 0000000200000040 ffff88021f303e40 ffff880215a0c000
>[  877.192685]  0000000000000100 ffff88020fc6b278 ffffffff810505ac ffff88020fc6b238
>[  877.192973]  ffff88021f303e00 ffffffff810505ca ffff88021f303e70 ffffffff81044570
>[  877.193257] Call Trace:
>[  877.193341]  <IRQ> 
>[  877.193383]  [<ffffffff810505ac>] ? __queue_work+0x274/0x274
>[  877.193598]  [<ffffffff810505ca>] delayed_work_timer_fn+0x1e/0x20
>[  877.193693]  [<ffffffff81044570>] call_timer_fn+0x97/0x165
>[  877.193785]  [<ffffffff810444de>] ? call_timer_fn+0x5/0x165
>[  877.193876]  [<ffffffff810505ac>] ? __queue_work+0x274/0x274
>[  877.193971]  [<ffffffff81044cbe>] run_timer_softirq+0x1ad/0x229
>[  877.194062]  [<ffffffff810840d5>] ? ktime_get+0x56/0xb7
>[  877.194153]  [<ffffffff8103df82>] __do_softirq+0x100/0x220
>[  877.194246]  [<ffffffff8108b000>] ? tick_program_event+0x24/0x26
>[  877.194340]  [<ffffffff8180328c>] call_softirq+0x1c/0x30
>[  877.194429]  [<ffffffff81003f56>] do_softirq+0x3c/0x86
>[  877.194517]  [<ffffffff8103e1b1>] irq_exit+0x57/0x9c
>[  877.194606]  [<ffffffff818039d9>] smp_apic_timer_interrupt+0x45/0x52
>[  877.194702]  [<ffffffff8180266f>] apic_timer_interrupt+0x6f/0x80
>[  877.194791]  <EOI> 
>[  877.194833]  [<ffffffff816fcf2b>] ? cpuidle_enter_state+0x55/0xbd
>[  877.195044]  [<ffffffff816fcf27>] ? cpuidle_enter_state+0x51/0xbd
>[  877.195138]  [<ffffffff817fdfd9>] ? __atomic_notifier_call_chain+0x5/0x8d
>[  877.195231]  [<ffffffff816fd09b>] cpuidle_idle_call+0x108/0x1b6
>[  877.195323]  [<ffffffff81009beb>] arch_cpu_idle+0xe/0x22
>[  877.195413]  [<ffffffff8107daa8>] cpu_startup_entry+0x131/0x1c5
>[  877.195506]  [<ffffffff81089c3a>] ? clockevents_config_and_register+0x23/0x27
>[  877.195602]  [<ffffffff8102546b>] start_secondary+0x1b7/0x1bc
>[  877.195691] Code: 2a 48 89 c7 e8 25 9c 7a 00 4c 89 e6 4c 89 ef e8 3c df ff ff 48 85 c0 74 0a 48 8b 40 20 48 39 58 08 74 12 4c 89 ef e8 e8 a1 7a 00 <49> 8b 3f e8 fb 9b 7a 00 eb 03 49 89 c7 41 83 7f 18 00 75 4d f6 
>[  877.198363] RIP  [<ffffffff8105046d>] __queue_work+0x135/0x274
>[  877.198492]  RSP <ffff88021f303db0>
>[  877.198584] CR2: 0000000000000000
>[  877.198673] ---[ end trace 750de539bc7068c8 ]---
>[  877.198761] Kernel panic - not syncing: Fatal exception in interrupt
>[  877.198882] ------------[ cut here ]------------
>[  877.198976] WARNING: CPU: 2 PID: 0 at arch/x86/kernel/smp.c:124 native_smp_send_reschedule+0x2d/0x5e()
>[  877.199110] Modules linked in: netconsole configfs ip6table_filter ip6_tables ipv6 iptable_filter ip_tables ebtable_nat ebtables x_tables dm_mod snd_hda_codec_hdmi snd_hda_codec_realtek pcspkr i2c_i801 snd_hda_intel iTCO_wdt snd_hda_codec iTCO_vendor_support snd_hwdep snd_pcm lpc_ich snd_page_alloc mfd_core snd_timer snd soundcore ppdev parport_pc parport wmi acpi_cpufreq video button freq_table [last unloaded: drm]
>[  877.200879] CPU: 2 PID: 0 Comm: swapper/2 Tainted: G      D      3.12.0-rc4_nightlytop_4e1044_debug_20131010_+ #673
>[  877.201016] Hardware name:                  /DH77EB, BIOS EBH7710H.86A.0062.2012.0329.1914 03/29/2012
>[  877.201155]  0000000000000009 ffff88021f303740 ffffffff817f3653 0000000000000006
>[  877.201445]  0000000000000000 ffff88021f303780 ffffffff81039d08 0000000000000000
>[  877.201733]  ffffffff81024969 0000000000000000 ffff88021f313140 000000010008d1f7
>[  877.202023] Call Trace:
>[  877.202110]  <IRQ>  [<ffffffff817f3653>] dump_stack+0x46/0x58
>[  877.202279]  [<ffffffff81039d08>] warn_slowpath_common+0x81/0x9b
>[  877.202370]  [<ffffffff81024969>] ? native_smp_send_reschedule+0x2d/0x5e
>[  877.202460]  [<ffffffff8108b4eb>] ? tick_sched_do_timer+0x2f/0x2f
>[  877.202554]  [<ffffffff81039d3c>] warn_slowpath_null+0x1a/0x1c
>[  877.202645]  [<ffffffff81024969>] native_smp_send_reschedule+0x2d/0x5e
>[  877.202738]  [<ffffffff8106d34c>] trigger_load_balance+0x26d/0x295
>[  877.202831]  [<ffffffff8106d145>] ? trigger_load_balance+0x66/0x295
>[  877.202926]  [<ffffffff8106402b>] scheduler_tick+0x87/0x90
>[  877.203017]  [<ffffffff81045734>] update_process_times+0x5e/0x6e
>[  877.203109]  [<ffffffff8108b203>] tick_sched_handle+0x4a/0x59
>[  877.203201]  [<ffffffff8108b526>] tick_sched_timer+0x3b/0x5a
>[  877.203294]  [<ffffffff8105a1c9>] __run_hrtimer+0xd4/0x19a
>[  877.203384]  [<ffffffff8105aa82>] hrtimer_interrupt+0xec/0x1d9
>[  877.203476]  [<ffffffff81026898>] local_apic_timer_interrupt+0x55/0x59
>[  877.203568]  [<ffffffff818039d4>] smp_apic_timer_interrupt+0x40/0x52
>[  877.203661]  [<ffffffff8180266f>] apic_timer_interrupt+0x6f/0x80
>[  877.203752]  [<ffffffff817fac9c>] ? retint_restore_args+0xe/0xe
>[  877.203843]  [<ffffffff817ede98>] ? panic+0x18f/0x1d0
>[  877.203933]  [<ffffffff817ede9b>] ? panic+0x192/0x1d0
>[  877.204023]  [<ffffffff817ede98>] ? panic+0x18f/0x1d0
>[  877.204111]  [<ffffffff8107d662>] ? kmsg_dump+0xc8/0xe9
>[  877.204203]  [<ffffffff817fb961>] oops_end+0xa4/0xb4
>[  877.204296]  [<ffffffff817ed8ec>] no_context+0x25f/0x28b
>[  877.204387]  [<ffffffff817edc31>] __bad_area_nosemaphore+0x1ce/0x1ef
>[  877.204481]  [<ffffffff817edc65>] bad_area_nosemaphore+0x13/0x15
>[  877.204575]  [<ffffffff817fdedc>] __do_page_fault+0x433/0x4ba
>[  877.204666]  [<ffffffff8108cfea>] ? trace_hardirqs_off+0xd/0xf
>[  877.204756]  [<ffffffff810e8b2e>] ? free_pages_prepare+0x108/0x130
>[  877.204848]  [<ffffffff8136d14d>] ? trace_hardirqs_off_thunk+0x3a/0x3c
>[  877.204940]  [<ffffffff817fdf71>] do_page_fault+0xe/0x10
>[  877.205031]  [<ffffffff817faea2>] page_fault+0x22/0x30
>[  877.205122]  [<ffffffff8105046d>] ? __queue_work+0x135/0x274
>[  877.205214]  [<ffffffff810505ac>] ? __queue_work+0x274/0x274
>[  877.205305]  [<ffffffff810505ca>] delayed_work_timer_fn+0x1e/0x20
>[  877.205400]  [<ffffffff81044570>] call_timer_fn+0x97/0x165
>[  877.205490]  [<ffffffff810444de>] ? call_timer_fn+0x5/0x165
>[  877.205583]  [<ffffffff810505ac>] ? __queue_work+0x274/0x274
>[  877.205675]  [<ffffffff81044cbe>] run_timer_softirq+0x1ad/0x229
>[  877.205768]  [<ffffffff810840d5>] ? ktime_get+0x56/0xb7
>[  877.205859]  [<ffffffff8103df82>] __do_softirq+0x100/0x220
>[  877.205949]  [<ffffffff8108b000>] ? tick_program_event+0x24/0x26
>[  877.206043]  [<ffffffff8180328c>] call_softirq+0x1c/0x30
>[  877.206132]  [<ffffffff81003f56>] do_softirq+0x3c/0x86
>[  877.206224]  [<ffffffff8103e1b1>] irq_exit+0x57/0x9c
>[  877.206314]  [<ffffffff818039d9>] smp_apic_timer_interrupt+0x45/0x52
>[  877.206406]  [<ffffffff8180266f>] apic_timer_interrupt+0x6f/0x80
>[  877.206494]  <EOI>  [<ffffffff816fcf2b>] ? cpuidle_enter_state+0x55/0xbd
>[  877.206665]  [<ffffffff816fcf27>] ? cpuidle_enter_state+0x51/0xbd
>[  877.206753]  [<ffffffff817fdfd9>] ? __atomic_notifier_call_chain+0x5/0x8d
>[  877.206849]  [<ffffffff816fd09b>] cpuidle_idle_call+0x108/0x1b6
>[  877.206942]  [<ffffffff81009beb>] arch_cpu_idle+0xe/0x22
>[  877.207034]  [<ffffffff8107daa8>] cpu_startup_entry+0x131/0x1c5
>[  877.207124]  [<ffffffff81089c3a>] ? clockevents_config_and_register+0x23/0x27
>[  877.207218]  [<ffffffff8102546b>] start_secondary+0x1b7/0x1bc
>[  877.207306] ---[ end trace 750de539bc7068c9 ]---

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