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[Bug 1483782] [NEW] BUG: unable to handle kernel paging request in apparmor_inode_free_security

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Public bug reported:

I've just had my machine lock up for the second time in 2 days, although
the first time left no trace in /var/log/kern.log. This is what I've
just seen:

Aug 11 15:22:05 farnsworth kernel: [53211.181003] BUG: unable to handle kernel paging request at 0000000101500034
Aug 11 15:22:05 farnsworth kernel: [53211.181051] IP: [<ffffffff813553a6>] apparmor_inode_free_security+0x16/0x30
Aug 11 15:22:05 farnsworth kernel: [53211.181090] PGD 0 
Aug 11 15:22:05 farnsworth kernel: [53211.181104] Oops: 0002 [#1] SMP 
Aug 11 15:22:05 farnsworth kernel: [53211.181124] Modules linked in: vhost_net vhost macvtap macvlan hidp hid xt_conntrack ipt_REJECT nf_reject_ipv4 ebtable_filter ebtables ip6table_filter ip6_tables ctr ccm xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack xt_tcpudp bridge stp llc iptable_filter ip_tables x_tables binfmt_misc rfcomm bnep nls_iso8859_1 dell_wmi sparse_keymap dell_laptop dcdbas i8k snd_hda_codec_hdmi intel_rapl iosf_mbi snd_hda_codec_idt snd_hda_codec_generic x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul arc4 dm_multipath ghash_clmulni_intel scsi_dh snd_hda_intel cdc_mbim uvcvideo videobuf2_vmalloc iwldvm videobuf2_memops aesni_intel snd_hda_controller videobuf2_core snd_hda_codec aes_x86_64 mac80211 lrw gf128mul snd_hwdep glue_helper ablk_helper v4l2_common cdc_ncm cryptd videodev btusb snd_pcm usbnet media bluetooth mii snd_seq_midi snd_seq_midi_event cdc_wdm i915 cdc_acm iwlwifi joydev snd_rawmidi serio_raw snd_seq snd_seq_device cfg80211 snd_timer drm_kms_helper snd drm wmi i2c_algo_bit soundcore 8250_fintek dell_smo8800 lpc_ich mei_me shpchp mei video mac_hid parport_pc ppdev lp parport autofs4 psmouse ahci libahci e1000e sdhci_pci sdhci ptp pps_core
Aug 11 15:22:05 farnsworth kernel: [53211.181850] CPU: 2 PID: 53 Comm: kswapd0 Tainted: G        W      3.19.0-25-generic #26-Ubuntu
Aug 11 15:22:05 farnsworth kernel: [53211.181891] Hardware name: Dell Inc. Latitude E6430/0CPWYR, BIOS A15 05/29/2014
Aug 11 15:22:05 farnsworth kernel: [53211.181927] task: ffff88040b641d70 ti: ffff8804086b4000 task.ti: ffff8804086b4000
Aug 11 15:22:05 farnsworth kernel: [53211.181963] RIP: 0010:[<ffffffff813553a6>]  [<ffffffff813553a6>] apparmor_inode_free_security+0x16/0x30
Aug 11 15:22:05 farnsworth kernel: [53211.182011] RSP: 0018:ffff8804086b7a70  EFLAGS: 00010202
Aug 11 15:22:05 farnsworth kernel: [53211.182037] RAX: 0000000101500034 RBX: ffff8800d5e99b08 RCX: 0000000000000034
Aug 11 15:22:05 farnsworth kernel: [53211.182072] RDX: 0000000000000003 RSI: ffff8800d5e99ba8 RDI: ffff8800d5e99b08
Aug 11 15:22:05 farnsworth kernel: [53211.182105] RBP: ffff8804086b7a88 R08: 0000000000000000 R09: 0000000000000000
Aug 11 15:22:05 farnsworth kernel: [53211.182139] R10: ffff88040d813800 R11: 000000000000000e R12: ffff8800d5e99b90
Aug 11 15:22:05 farnsworth kernel: [53211.182174] R13: ffffffff81837140 R14: ffffffff81837140 R15: ffff8803fb2cb900
Aug 11 15:22:05 farnsworth kernel: [53211.182208] FS:  0000000000000000(0000) GS:ffff88041e300000(0000) knlGS:0000000000000000
Aug 11 15:22:05 farnsworth kernel: [53211.182247] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Aug 11 15:22:05 farnsworth kernel: [53211.182274] CR2: 0000000101500034 CR3: 0000000002c13000 CR4: 00000000001427e0
Aug 11 15:22:05 farnsworth kernel: [53211.182308] Stack:
Aug 11 15:22:05 farnsworth kernel: [53211.182319]  ffffffff81314676 ffff8804086b7a78 ffff8800d5e99b08 ffff8804086b7aa8
Aug 11 15:22:05 farnsworth kernel: [53211.182360]  ffffffff81211156 0000000000000003 ffff8800d5e99b08 ffff8804086b7ac8
Aug 11 15:22:05 farnsworth kernel: [53211.182400]  ffffffff81211236 ffff8800d5e99b08 ffff8800d5e99b08 ffff8804086b7af8
Aug 11 15:22:05 farnsworth kernel: [53211.182441] Call Trace:
Aug 11 15:22:05 farnsworth kernel: [53211.182459]  [<ffffffff81314676>] ? security_inode_free+0x26/0x30
Aug 11 15:22:05 farnsworth kernel: [53211.182492]  [<ffffffff81211156>] __destroy_inode+0x26/0xe0
Aug 11 15:22:05 farnsworth kernel: [53211.182521]  [<ffffffff81211236>] destroy_inode+0x26/0x70
Aug 11 15:22:05 farnsworth kernel: [53211.182549]  [<ffffffff8121139f>] evict+0x11f/0x1b0
Aug 11 15:22:05 farnsworth kernel: [53211.182575]  [<ffffffff81211bf5>] iput+0xf5/0x1a0
Aug 11 15:22:05 farnsworth kernel: [53211.182599]  [<ffffffff8120cc58>] __dentry_kill+0x188/0x200
Aug 11 15:22:05 farnsworth kernel: [53211.182627]  [<ffffffff8120d3ab>] shrink_dentry_list+0xeb/0x320
Aug 11 15:22:05 farnsworth kernel: [53211.182656]  [<ffffffff8120eb07>] prune_dcache_sb+0x47/0x60
Aug 11 15:22:05 farnsworth kernel: [53211.182683]  [<ffffffff811f8470>] super_cache_scan+0x100/0x180
Aug 11 15:22:05 farnsworth kernel: [53211.182711]  [<ffffffff8118e069>] shrink_node_slabs+0x1b9/0x340
Aug 11 15:22:05 farnsworth kernel: [53211.182739]  [<ffffffff81190cb7>] shrink_zone+0x217/0x240
Aug 11 15:22:05 farnsworth kernel: [53211.184330]  [<ffffffff81191d64>] kswapd+0x5c4/0xa70
Aug 11 15:22:05 farnsworth kernel: [53211.185842]  [<ffffffff811917a0>] ? mem_cgroup_shrink_node_zone+0x150/0x150
Aug 11 15:22:05 farnsworth kernel: [53211.187390]  [<ffffffff81095939>] kthread+0xc9/0xe0
Aug 11 15:22:05 farnsworth kernel: [53211.188938]  [<ffffffff81095870>] ? kthread_create_on_node+0x1c0/0x1c0
Aug 11 15:22:05 farnsworth kernel: [53211.190480]  [<ffffffff817cb518>] ret_from_fork+0x58/0x90
Aug 11 15:22:05 farnsworth kernel: [53211.191948]  [<ffffffff81095870>] ? kthread_create_on_node+0x1c0/0x1c0
Aug 11 15:22:05 farnsworth kernel: [53211.192948] Code: 5c 41 5d 5d c3 0f 0b 0f 1f 40 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 8b 47 38 48 85 c0 74 1f 48 c7 47 38 00 00 00 00 <f0> 83 28 01 74 04 c3 0f 1f 00 55 48 89 c7 48 89 e5 e8 24 53 00 
Aug 11 15:22:05 farnsworth kernel: [53211.195217] RIP  [<ffffffff813553a6>] apparmor_inode_free_security+0x16/0x30
Aug 11 15:22:05 farnsworth kernel: [53211.196323]  RSP <ffff8804086b7a70>
Aug 11 15:22:05 farnsworth kernel: [53211.197454] CR2: 0000000101500034
Aug 11 15:22:05 farnsworth kernel: [53211.202972] ---[ end trace 94b82e98c00763ea ]---

And an earlier warning:

Aug 11 07:58:31 farnsworth kernel: [28487.604592] ------------[ cut here ]------------
Aug 11 07:58:31 farnsworth kernel: [28487.604627] WARNING: CPU: 0 PID: 0 at /build/linux-OdodyZ/linux-3.19.0/drivers/gpu/drm/i915/intel_display.c:9717 intel_check_page_flip+0xda/0xf0 [i915]()
Aug 11 07:58:31 farnsworth kernel: [28487.604629] Kicking stuck page flip: queued at 1265526, now 1265537
Aug 11 07:58:31 farnsworth kernel: [28487.604629] Modules linked in: vhost_net vhost macvtap macvlan hidp hid xt_conntrack ipt_REJECT nf_reject_ipv4 ebtable_filter ebtables ip6table_filter ip6_tables ctr ccm xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack xt_tcpudp bridge stp llc iptable_filter ip_tables x_tables binfmt_misc rfcomm bnep nls_iso8859_1 dell_wmi sparse_keymap dell_laptop dcdbas i8k snd_hda_codec_hdmi intel_rapl iosf_mbi snd_hda_codec_idt snd_hda_codec_generic x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul arc4 dm_multipath ghash_clmulni_intel scsi_dh snd_hda_intel cdc_mbim uvcvideo videobuf2_vmalloc iwldvm videobuf2_memops aesni_intel snd_hda_controller videobuf2_core snd_hda_codec aes_x86_64 mac80211 lrw gf128mul snd_hwdep glue_helper ablk_helper v4l2_common cdc_ncm cryptd videodev btusb snd_pcm usbnet media bluetooth mii snd_seq_midi snd_seq_midi_event cdc_wdm i915 cdc_acm iwlwifi joydev snd_rawmidi serio_raw snd_seq snd_seq_device cfg80211 snd_timer drm_kms_helper snd drm wmi i2c_algo_bit soundcore 8250_fintek dell_smo8800 lpc_ich mei_me shpchp mei video mac_hid parport_pc ppdev lp parport autofs4 psmouse ahci libahci e1000e sdhci_pci sdhci ptp pps_core
Aug 11 07:58:31 farnsworth kernel: [28487.604666] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.19.0-25-generic #26-Ubuntu
Aug 11 07:58:31 farnsworth kernel: [28487.604667] Hardware name: Dell Inc. Latitude E6430/0CPWYR, BIOS A15 05/29/2014
Aug 11 07:58:31 farnsworth kernel: [28487.604668]  ffffffffc07a6310 ffff88041e203d28 ffffffff817c4518 0000000000000007
Aug 11 07:58:31 farnsworth kernel: [28487.604670]  ffff88041e203d78 ffff88041e203d68 ffffffff81076a6a ffff88041e203d88
Aug 11 07:58:31 farnsworth kernel: [28487.604671]  ffff88040a3e1000 ffff880409fb1800 0000000000000000 ffff880409fb19a8
Aug 11 07:58:31 farnsworth kernel: [28487.604673] Call Trace:
Aug 11 07:58:31 farnsworth kernel: [28487.604674]  <IRQ>  [<ffffffff817c4518>] dump_stack+0x45/0x57
Aug 11 07:58:31 farnsworth kernel: [28487.604681]  [<ffffffff81076a6a>] warn_slowpath_common+0x8a/0xc0
Aug 11 07:58:31 farnsworth kernel: [28487.604683]  [<ffffffff81076ae6>] warn_slowpath_fmt+0x46/0x50
Aug 11 07:58:31 farnsworth kernel: [28487.604694]  [<ffffffffc0751b8a>] intel_check_page_flip+0xda/0xf0 [i915]
Aug 11 07:58:31 farnsworth kernel: [28487.604704]  [<ffffffffc071e7f8>] ironlake_irq_handler+0x2e8/0xfd0 [i915]
Aug 11 07:58:31 farnsworth kernel: [28487.604707]  [<ffffffff810b7816>] ? complete+0x46/0x60
Aug 11 07:58:31 farnsworth kernel: [28487.604710]  [<ffffffff815c000e>] ? usb_api_blocking_completion+0x1e/0x20
Aug 11 07:58:31 farnsworth kernel: [28487.604712]  [<ffffffff815bbc7a>] ? __usb_hcd_giveback_urb+0xaa/0x140
Aug 11 07:58:31 farnsworth kernel: [28487.604714]  [<ffffffff810ce807>] handle_irq_event_percpu+0x77/0x1a0
Aug 11 07:58:31 farnsworth kernel: [28487.604716]  [<ffffffff810ce971>] handle_irq_event+0x41/0x70
Aug 11 07:58:31 farnsworth kernel: [28487.604718]  [<ffffffff810d19de>] handle_edge_irq+0x6e/0x120
Aug 11 07:58:31 farnsworth kernel: [28487.604720]  [<ffffffff81017772>] handle_irq+0x22/0x40
Aug 11 07:58:31 farnsworth kernel: [28487.604722]  [<ffffffff817ce55f>] do_IRQ+0x4f/0xf0
Aug 11 07:58:31 farnsworth kernel: [28487.604723]  [<ffffffff817cc36d>] common_interrupt+0x6d/0x6d
Aug 11 07:58:31 farnsworth kernel: [28487.604724]  <EOI>  [<ffffffff816663b5>] ? cpuidle_enter_state+0x65/0x160
Aug 11 07:58:31 farnsworth kernel: [28487.604727]  [<ffffffff816663a1>] ? cpuidle_enter_state+0x51/0x160
Aug 11 07:58:31 farnsworth kernel: [28487.604728]  [<ffffffff81666597>] cpuidle_enter+0x17/0x20
Aug 11 07:58:31 farnsworth kernel: [28487.604730]  [<ffffffff810b7ce1>] cpu_startup_entry+0x311/0x3b0
Aug 11 07:58:31 farnsworth kernel: [28487.604732]  [<ffffffff817b9077>] rest_init+0x77/0x80
Aug 11 07:58:31 farnsworth kernel: [28487.604734]  [<ffffffff81d4cfce>] start_kernel+0x482/0x48f
Aug 11 07:58:31 farnsworth kernel: [28487.604736]  [<ffffffff81d4c120>] ? early_idt_handlers+0x120/0x120
Aug 11 07:58:31 farnsworth kernel: [28487.604738]  [<ffffffff81d4c4d7>] x86_64_start_reservations+0x2a/0x2c
Aug 11 07:58:31 farnsworth kernel: [28487.604739]  [<ffffffff81d4c61c>] x86_64_start_kernel+0x143/0x152
Aug 11 07:58:31 farnsworth kernel: [28487.604740] ---[ end trace 94b82e98c00763e9 ]---

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: linux-image-3.19.0-25-generic 3.19.0-25.26
ProcVersionSignature: Ubuntu 3.19.0-25.26-generic 3.19.8-ckt2
Uname: Linux 3.19.0-25-generic x86_64
ApportVersion: 2.17.2-0ubuntu1.2
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  chr1s      1773 F.... pulseaudio
CurrentDesktop: Unity
Date: Tue Aug 11 15:44:46 2015
HibernationDevice: RESUME=UUID=1ddf0115-d0ba-4fa5-ac2a-0aaef10c2f47
InstallationDate: Installed on 2013-03-27 (867 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Alpha amd64 (20130326)
MachineType: Dell Inc. Latitude E6430
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-25-generic root=UUID=d8ecd73b-f2ef-400d-b805-f7a77c75db17 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.19.0-25-generic N/A
 linux-backports-modules-3.19.0-25-generic  N/A
 linux-firmware                             1.143.2
SourcePackage: linux
UpgradeStatus: Upgraded to vivid on 2015-04-20 (113 days ago)
dmi.bios.date: 05/29/2014
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A15
dmi.board.name: 0CPWYR
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA15:bd05/29/2014:svnDellInc.:pnLatitudeE6430:pvr01:rvnDellInc.:rn0CPWYR:rvrA00:cvnDellInc.:ct9:cvr:
dmi.product.name: Latitude E6430
dmi.product.version: 01
dmi.sys.vendor: Dell Inc.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug vivid

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https://bugs.launchpad.net/bugs/1483782

Title:
  BUG: unable to handle kernel paging request in
  apparmor_inode_free_security

Status in linux package in Ubuntu:
  New

Bug description:
  I've just had my machine lock up for the second time in 2 days,
  although the first time left no trace in /var/log/kern.log. This is
  what I've just seen:

  Aug 11 15:22:05 farnsworth kernel: [53211.181003] BUG: unable to handle kernel paging request at 0000000101500034
  Aug 11 15:22:05 farnsworth kernel: [53211.181051] IP: [<ffffffff813553a6>] apparmor_inode_free_security+0x16/0x30
  Aug 11 15:22:05 farnsworth kernel: [53211.181090] PGD 0 
  Aug 11 15:22:05 farnsworth kernel: [53211.181104] Oops: 0002 [#1] SMP 
  Aug 11 15:22:05 farnsworth kernel: [53211.181124] Modules linked in: vhost_net vhost macvtap macvlan hidp hid xt_conntrack ipt_REJECT nf_reject_ipv4 ebtable_filter ebtables ip6table_filter ip6_tables ctr ccm xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack xt_tcpudp bridge stp llc iptable_filter ip_tables x_tables binfmt_misc rfcomm bnep nls_iso8859_1 dell_wmi sparse_keymap dell_laptop dcdbas i8k snd_hda_codec_hdmi intel_rapl iosf_mbi snd_hda_codec_idt snd_hda_codec_generic x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul arc4 dm_multipath ghash_clmulni_intel scsi_dh snd_hda_intel cdc_mbim uvcvideo videobuf2_vmalloc iwldvm videobuf2_memops aesni_intel snd_hda_controller videobuf2_core snd_hda_codec aes_x86_64 mac80211 lrw gf128mul snd_hwdep glue_helper ablk_helper v4l2_common cdc_ncm cryptd videodev btusb snd_pcm usbnet media bluetooth mii snd_seq_midi snd_seq_midi_event cdc_wdm i915 cdc_acm iwlwifi joydev snd_rawmidi serio_raw snd_seq snd_seq_device cfg80211 snd_timer drm_kms_helper snd drm wmi i2c_algo_bit soundcore 8250_fintek dell_smo8800 lpc_ich mei_me shpchp mei video mac_hid parport_pc ppdev lp parport autofs4 psmouse ahci libahci e1000e sdhci_pci sdhci ptp pps_core
  Aug 11 15:22:05 farnsworth kernel: [53211.181850] CPU: 2 PID: 53 Comm: kswapd0 Tainted: G        W      3.19.0-25-generic #26-Ubuntu
  Aug 11 15:22:05 farnsworth kernel: [53211.181891] Hardware name: Dell Inc. Latitude E6430/0CPWYR, BIOS A15 05/29/2014
  Aug 11 15:22:05 farnsworth kernel: [53211.181927] task: ffff88040b641d70 ti: ffff8804086b4000 task.ti: ffff8804086b4000
  Aug 11 15:22:05 farnsworth kernel: [53211.181963] RIP: 0010:[<ffffffff813553a6>]  [<ffffffff813553a6>] apparmor_inode_free_security+0x16/0x30
  Aug 11 15:22:05 farnsworth kernel: [53211.182011] RSP: 0018:ffff8804086b7a70  EFLAGS: 00010202
  Aug 11 15:22:05 farnsworth kernel: [53211.182037] RAX: 0000000101500034 RBX: ffff8800d5e99b08 RCX: 0000000000000034
  Aug 11 15:22:05 farnsworth kernel: [53211.182072] RDX: 0000000000000003 RSI: ffff8800d5e99ba8 RDI: ffff8800d5e99b08
  Aug 11 15:22:05 farnsworth kernel: [53211.182105] RBP: ffff8804086b7a88 R08: 0000000000000000 R09: 0000000000000000
  Aug 11 15:22:05 farnsworth kernel: [53211.182139] R10: ffff88040d813800 R11: 000000000000000e R12: ffff8800d5e99b90
  Aug 11 15:22:05 farnsworth kernel: [53211.182174] R13: ffffffff81837140 R14: ffffffff81837140 R15: ffff8803fb2cb900
  Aug 11 15:22:05 farnsworth kernel: [53211.182208] FS:  0000000000000000(0000) GS:ffff88041e300000(0000) knlGS:0000000000000000
  Aug 11 15:22:05 farnsworth kernel: [53211.182247] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  Aug 11 15:22:05 farnsworth kernel: [53211.182274] CR2: 0000000101500034 CR3: 0000000002c13000 CR4: 00000000001427e0
  Aug 11 15:22:05 farnsworth kernel: [53211.182308] Stack:
  Aug 11 15:22:05 farnsworth kernel: [53211.182319]  ffffffff81314676 ffff8804086b7a78 ffff8800d5e99b08 ffff8804086b7aa8
  Aug 11 15:22:05 farnsworth kernel: [53211.182360]  ffffffff81211156 0000000000000003 ffff8800d5e99b08 ffff8804086b7ac8
  Aug 11 15:22:05 farnsworth kernel: [53211.182400]  ffffffff81211236 ffff8800d5e99b08 ffff8800d5e99b08 ffff8804086b7af8
  Aug 11 15:22:05 farnsworth kernel: [53211.182441] Call Trace:
  Aug 11 15:22:05 farnsworth kernel: [53211.182459]  [<ffffffff81314676>] ? security_inode_free+0x26/0x30
  Aug 11 15:22:05 farnsworth kernel: [53211.182492]  [<ffffffff81211156>] __destroy_inode+0x26/0xe0
  Aug 11 15:22:05 farnsworth kernel: [53211.182521]  [<ffffffff81211236>] destroy_inode+0x26/0x70
  Aug 11 15:22:05 farnsworth kernel: [53211.182549]  [<ffffffff8121139f>] evict+0x11f/0x1b0
  Aug 11 15:22:05 farnsworth kernel: [53211.182575]  [<ffffffff81211bf5>] iput+0xf5/0x1a0
  Aug 11 15:22:05 farnsworth kernel: [53211.182599]  [<ffffffff8120cc58>] __dentry_kill+0x188/0x200
  Aug 11 15:22:05 farnsworth kernel: [53211.182627]  [<ffffffff8120d3ab>] shrink_dentry_list+0xeb/0x320
  Aug 11 15:22:05 farnsworth kernel: [53211.182656]  [<ffffffff8120eb07>] prune_dcache_sb+0x47/0x60
  Aug 11 15:22:05 farnsworth kernel: [53211.182683]  [<ffffffff811f8470>] super_cache_scan+0x100/0x180
  Aug 11 15:22:05 farnsworth kernel: [53211.182711]  [<ffffffff8118e069>] shrink_node_slabs+0x1b9/0x340
  Aug 11 15:22:05 farnsworth kernel: [53211.182739]  [<ffffffff81190cb7>] shrink_zone+0x217/0x240
  Aug 11 15:22:05 farnsworth kernel: [53211.184330]  [<ffffffff81191d64>] kswapd+0x5c4/0xa70
  Aug 11 15:22:05 farnsworth kernel: [53211.185842]  [<ffffffff811917a0>] ? mem_cgroup_shrink_node_zone+0x150/0x150
  Aug 11 15:22:05 farnsworth kernel: [53211.187390]  [<ffffffff81095939>] kthread+0xc9/0xe0
  Aug 11 15:22:05 farnsworth kernel: [53211.188938]  [<ffffffff81095870>] ? kthread_create_on_node+0x1c0/0x1c0
  Aug 11 15:22:05 farnsworth kernel: [53211.190480]  [<ffffffff817cb518>] ret_from_fork+0x58/0x90
  Aug 11 15:22:05 farnsworth kernel: [53211.191948]  [<ffffffff81095870>] ? kthread_create_on_node+0x1c0/0x1c0
  Aug 11 15:22:05 farnsworth kernel: [53211.192948] Code: 5c 41 5d 5d c3 0f 0b 0f 1f 40 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 8b 47 38 48 85 c0 74 1f 48 c7 47 38 00 00 00 00 <f0> 83 28 01 74 04 c3 0f 1f 00 55 48 89 c7 48 89 e5 e8 24 53 00 
  Aug 11 15:22:05 farnsworth kernel: [53211.195217] RIP  [<ffffffff813553a6>] apparmor_inode_free_security+0x16/0x30
  Aug 11 15:22:05 farnsworth kernel: [53211.196323]  RSP <ffff8804086b7a70>
  Aug 11 15:22:05 farnsworth kernel: [53211.197454] CR2: 0000000101500034
  Aug 11 15:22:05 farnsworth kernel: [53211.202972] ---[ end trace 94b82e98c00763ea ]---

  And an earlier warning:

  Aug 11 07:58:31 farnsworth kernel: [28487.604592] ------------[ cut here ]------------
  Aug 11 07:58:31 farnsworth kernel: [28487.604627] WARNING: CPU: 0 PID: 0 at /build/linux-OdodyZ/linux-3.19.0/drivers/gpu/drm/i915/intel_display.c:9717 intel_check_page_flip+0xda/0xf0 [i915]()
  Aug 11 07:58:31 farnsworth kernel: [28487.604629] Kicking stuck page flip: queued at 1265526, now 1265537
  Aug 11 07:58:31 farnsworth kernel: [28487.604629] Modules linked in: vhost_net vhost macvtap macvlan hidp hid xt_conntrack ipt_REJECT nf_reject_ipv4 ebtable_filter ebtables ip6table_filter ip6_tables ctr ccm xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack xt_tcpudp bridge stp llc iptable_filter ip_tables x_tables binfmt_misc rfcomm bnep nls_iso8859_1 dell_wmi sparse_keymap dell_laptop dcdbas i8k snd_hda_codec_hdmi intel_rapl iosf_mbi snd_hda_codec_idt snd_hda_codec_generic x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul arc4 dm_multipath ghash_clmulni_intel scsi_dh snd_hda_intel cdc_mbim uvcvideo videobuf2_vmalloc iwldvm videobuf2_memops aesni_intel snd_hda_controller videobuf2_core snd_hda_codec aes_x86_64 mac80211 lrw gf128mul snd_hwdep glue_helper ablk_helper v4l2_common cdc_ncm cryptd videodev btusb snd_pcm usbnet media bluetooth mii snd_seq_midi snd_seq_midi_event cdc_wdm i915 cdc_acm iwlwifi joydev snd_rawmidi serio_raw snd_seq snd_seq_device cfg80211 snd_timer drm_kms_helper snd drm wmi i2c_algo_bit soundcore 8250_fintek dell_smo8800 lpc_ich mei_me shpchp mei video mac_hid parport_pc ppdev lp parport autofs4 psmouse ahci libahci e1000e sdhci_pci sdhci ptp pps_core
  Aug 11 07:58:31 farnsworth kernel: [28487.604666] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.19.0-25-generic #26-Ubuntu
  Aug 11 07:58:31 farnsworth kernel: [28487.604667] Hardware name: Dell Inc. Latitude E6430/0CPWYR, BIOS A15 05/29/2014
  Aug 11 07:58:31 farnsworth kernel: [28487.604668]  ffffffffc07a6310 ffff88041e203d28 ffffffff817c4518 0000000000000007
  Aug 11 07:58:31 farnsworth kernel: [28487.604670]  ffff88041e203d78 ffff88041e203d68 ffffffff81076a6a ffff88041e203d88
  Aug 11 07:58:31 farnsworth kernel: [28487.604671]  ffff88040a3e1000 ffff880409fb1800 0000000000000000 ffff880409fb19a8
  Aug 11 07:58:31 farnsworth kernel: [28487.604673] Call Trace:
  Aug 11 07:58:31 farnsworth kernel: [28487.604674]  <IRQ>  [<ffffffff817c4518>] dump_stack+0x45/0x57
  Aug 11 07:58:31 farnsworth kernel: [28487.604681]  [<ffffffff81076a6a>] warn_slowpath_common+0x8a/0xc0
  Aug 11 07:58:31 farnsworth kernel: [28487.604683]  [<ffffffff81076ae6>] warn_slowpath_fmt+0x46/0x50
  Aug 11 07:58:31 farnsworth kernel: [28487.604694]  [<ffffffffc0751b8a>] intel_check_page_flip+0xda/0xf0 [i915]
  Aug 11 07:58:31 farnsworth kernel: [28487.604704]  [<ffffffffc071e7f8>] ironlake_irq_handler+0x2e8/0xfd0 [i915]
  Aug 11 07:58:31 farnsworth kernel: [28487.604707]  [<ffffffff810b7816>] ? complete+0x46/0x60
  Aug 11 07:58:31 farnsworth kernel: [28487.604710]  [<ffffffff815c000e>] ? usb_api_blocking_completion+0x1e/0x20
  Aug 11 07:58:31 farnsworth kernel: [28487.604712]  [<ffffffff815bbc7a>] ? __usb_hcd_giveback_urb+0xaa/0x140
  Aug 11 07:58:31 farnsworth kernel: [28487.604714]  [<ffffffff810ce807>] handle_irq_event_percpu+0x77/0x1a0
  Aug 11 07:58:31 farnsworth kernel: [28487.604716]  [<ffffffff810ce971>] handle_irq_event+0x41/0x70
  Aug 11 07:58:31 farnsworth kernel: [28487.604718]  [<ffffffff810d19de>] handle_edge_irq+0x6e/0x120
  Aug 11 07:58:31 farnsworth kernel: [28487.604720]  [<ffffffff81017772>] handle_irq+0x22/0x40
  Aug 11 07:58:31 farnsworth kernel: [28487.604722]  [<ffffffff817ce55f>] do_IRQ+0x4f/0xf0
  Aug 11 07:58:31 farnsworth kernel: [28487.604723]  [<ffffffff817cc36d>] common_interrupt+0x6d/0x6d
  Aug 11 07:58:31 farnsworth kernel: [28487.604724]  <EOI>  [<ffffffff816663b5>] ? cpuidle_enter_state+0x65/0x160
  Aug 11 07:58:31 farnsworth kernel: [28487.604727]  [<ffffffff816663a1>] ? cpuidle_enter_state+0x51/0x160
  Aug 11 07:58:31 farnsworth kernel: [28487.604728]  [<ffffffff81666597>] cpuidle_enter+0x17/0x20
  Aug 11 07:58:31 farnsworth kernel: [28487.604730]  [<ffffffff810b7ce1>] cpu_startup_entry+0x311/0x3b0
  Aug 11 07:58:31 farnsworth kernel: [28487.604732]  [<ffffffff817b9077>] rest_init+0x77/0x80
  Aug 11 07:58:31 farnsworth kernel: [28487.604734]  [<ffffffff81d4cfce>] start_kernel+0x482/0x48f
  Aug 11 07:58:31 farnsworth kernel: [28487.604736]  [<ffffffff81d4c120>] ? early_idt_handlers+0x120/0x120
  Aug 11 07:58:31 farnsworth kernel: [28487.604738]  [<ffffffff81d4c4d7>] x86_64_start_reservations+0x2a/0x2c
  Aug 11 07:58:31 farnsworth kernel: [28487.604739]  [<ffffffff81d4c61c>] x86_64_start_kernel+0x143/0x152
  Aug 11 07:58:31 farnsworth kernel: [28487.604740] ---[ end trace 94b82e98c00763e9 ]---

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-3.19.0-25-generic 3.19.0-25.26
  ProcVersionSignature: Ubuntu 3.19.0-25.26-generic 3.19.8-ckt2
  Uname: Linux 3.19.0-25-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  chr1s      1773 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Tue Aug 11 15:44:46 2015
  HibernationDevice: RESUME=UUID=1ddf0115-d0ba-4fa5-ac2a-0aaef10c2f47
  InstallationDate: Installed on 2013-03-27 (867 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Alpha amd64 (20130326)
  MachineType: Dell Inc. Latitude E6430
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-25-generic root=UUID=d8ecd73b-f2ef-400d-b805-f7a77c75db17 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-25-generic N/A
   linux-backports-modules-3.19.0-25-generic  N/A
   linux-firmware                             1.143.2
  SourcePackage: linux
  UpgradeStatus: Upgraded to vivid on 2015-04-20 (113 days ago)
  dmi.bios.date: 05/29/2014
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A15
  dmi.board.name: 0CPWYR
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA15:bd05/29/2014:svnDellInc.:pnLatitudeE6430:pvr01:rvnDellInc.:rn0CPWYR:rvrA00:cvnDellInc.:ct9:cvr:
  dmi.product.name: Latitude E6430
  dmi.product.version: 01
  dmi.sys.vendor: Dell Inc.

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