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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

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** Changed in: linux (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1527559

Title:
  Kernel Oops - BUG: unable to handle kernel NULL pointer dereference;
  inotify, fsnotify

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I ran in a bug similar to #922906   while running inotifywait on
  kernel:

  3.19.0-30-generic #34-Ubuntu SMP Fri Oct 2 22:08:41 UTC 2015 x86_64
  x86_64 x86_64 GNU/Linux

  ------

  [3975766.571492] BUG: unable to handle kernel paging request at 00000000812363a7
  [3975766.571500] IP: [<00000000812363a7>] 0x812363a7
  [3975766.571507] PGD 0
  [3975766.571510] Oops: 0010 [#1] SMP
  [3975766.571514] Modules linked in: tcp_diag udp_diag inet_diag unix_diag nfsd auth_rpcgss nfs_acl lockd grace sunrpc nfnetlink_queue nfnetlink_log nfnetlink bluetooth ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c 8021q garp mrp vhost_net vhost macvtap macvlan ip6t_REJECT nf_reject_ipv6 xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables vmnet(OE) vmw_vsock_vmci_transport vsock vmw_vmci vmmon(OE) cfg80211 nls_iso8859_1 nvidia(POE) x86_pkg_temp_thermal intel_powerclamp coretemp snd_hda_codec_hdmi hp_wmi snd_hda_codec_realtek kvm_intel snd_hda_codec_generic kvm
  [3975766.571558] sparse_keymap snd_hda_intel crct10dif_pclmul snd_hda_controller crc32_pclmul dm_multipath ghash_clmulni_intel snd_hda_codec aesni_intel snd_hwdep snd_pcm aes_x86_64 scsi_dh snd_seq_midi lrw gf128mul snd_seq_midi_event drm snd_rawmidi snd_seq glue_helper snd_seq_device ablk_helper cryptd mei_me snd_timer sb_edac snd soundcore mei edac_core ioatdma serio_raw 8250_fintek shpchp wmi lpc_ich tpm_infineon mac_hid parport_pc ppdev lp parport autofs4 btrfs xor raid6_pq hid_generic usbhid hid igb i2c_algo_bit firewire_ohci e1000e psmouse dca isci firewire_core ahci ptp libsas libahci crc_itu_t pps_core scsi_transport_sas pata_acpi
  [3975766.571600] CPU: 4 PID: 109 Comm: fsnotify_mark Tainted: P C OE 3.19.0-30-generic #34-Ubuntu
  [3975766.571603] Hardware name: Hewlett-Packard HP Z620 Workstation/158A, BIOS J61 v03.65 12/19/2013
  [3975766.571606] task: ffff881fa1033ae0 ti: ffff881f9c84c000 task.ti: ffff881f9c84c000
  [3975766.571608] RIP: 0010:[<00000000812363a7>] [<00000000812363a7>] 0x812363a7
  [3975766.571613] RSP: 0018:ffff881f9c84fe58 EFLAGS: 00010286
  [3975766.571616] RAX: ffffffff81fb1810 RBX: ffff881f9c84fe60 RCX: 0000000000000000
  [3975766.571617] RDX: 000000000000bbea RSI: 0000000000000000 RDI: ffffffff81fb1810
  [3975766.571619] RBP: ffff881f9c84feb8 R08: ffffffff81d294c8 R09: 0000000180270014
  [3975766.571621] R10: ffff88202fc98fe0 R11: ffff880a72398548 R12: ffff881f9c84fe88
  [3975766.571623] R13: ffff881f9c84fe50 R14: 0000000000000000 R15: 0000000000000000
  [3975766.571625] FS: 0000000000000000(0000) GS:ffff88202fc80000(0000) knlGS:0000000000000000
  [3975766.571627] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  [3975766.571629] CR2: 00000000812363a7 CR3: 0000000001c13000 CR4: 00000000001427f0
  [3975766.571630] Stack:
  [3975766.571632] ffff881f9c84ffd8 ffff880a72398628 ffff880a72398628 ffff881f00020000
  [3975766.571635] ffff881fa1033ae0 ffffffff810b7680 ffff881f9c84fe88 ffff881f9c84fe88
  [3975766.571638] 0000000000000000 ffff880f9dc83b40 0000000000000000 ffffffff81236330
  [3975766.571641] Call Trace:
  [3975766.571650] [<ffffffff810b7680>] ? wait_woken+0x90/0x90
  [3975766.571656] [<ffffffff81236330>] ? fsnotify_put_mark+0x40/0x40
  [3975766.571661] [<ffffffff81095959>] kthread+0xc9/0xe0
  [3975766.571665] [<ffffffff81095890>] ? kthread_create_on_node+0x1c0/0x1c0
  [3975766.571670] [<ffffffff817cbdd8>] ret_from_fork+0x58/0x90
  [3975766.571674] [<ffffffff81095890>] ? kthread_create_on_node+0x1c0/0x1c0
  [3975766.571676] Code: Bad RIP value.
  [3975766.571678] RIP [<00000000812363a7>] 0x812363a7
  [3975766.571683] RSP <ffff881f9c84fe58>
  [3975766.571684] CR2: 00000000812363a7
  [3975766.571687] ---[ end trace 52f13d4ec1680637 ]---
  [3975766.571693] BUG: unable to handle kernel NULL pointer dereference at 0000000000000088
  [3975766.571697] IP: [<ffffffff817cba6e>] _raw_spin_lock+0xe/0x80
  [3975766.571704] PGD 0
  [3975766.571706] Oops: 0002 [#2] SMP
  [3975766.571709] Modules linked in: tcp_diag udp_diag inet_diag unix_diag nfsd auth_rpcgss nfs_acl lockd grace sunrpc nfnetlink_queue nfnetlink_log nfnetlink bluetooth ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c 8021q garp mrp vhost_net vhost macvtap macvlan ip6t_REJECT nf_reject_ipv6 xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables vmnet(OE) vmw_vsock_vmci_transport vsock vmw_vmci vmmon(OE) cfg80211 nls_iso8859_1 nvidia(POE) x86_pkg_temp_thermal intel_powerclamp coretemp snd_hda_codec_hdmi hp_wmi snd_hda_codec_realtek kvm_intel snd_hda_codec_generic kvm
  [3975766.571756] sparse_keymap snd_hda_intel crct10dif_pclmul snd_hda_controller crc32_pclmul dm_multipath ghash_clmulni_intel snd_hda_codec aesni_intel snd_hwdep snd_pcm aes_x86_64 scsi_dh snd_seq_midi lrw gf128mul snd_seq_midi_event drm snd_rawmidi snd_seq glue_helper snd_seq_device ablk_helper cryptd mei_me snd_timer sb_edac snd soundcore mei edac_core ioatdma serio_raw 8250_fintek shpchp wmi lpc_ich tpm_infineon mac_hid parport_pc ppdev lp parport autofs4 btrfs xor raid6_pq hid_generic usbhid hid igb i2c_algo_bit firewire_ohci e1000e psmouse dca isci firewire_core ahci ptp libsas libahci crc_itu_t pps_core scsi_transport_sas pata_acpi
  [3975766.571797] CPU: 9 PID: 10292 Comm: inotifywait Tainted: P D C OE 3.19.0-30-generic #34-Ubuntu
  [3975766.571800] Hardware name: Hewlett-Packard HP Z620 Workstation/158A, BIOS J61 v03.65 12/19/2013
  [3975766.571802] task: ffff881f9cb9ce80 ti: ffff88175588c000 task.ti: ffff88175588c000
  [3975766.571804] RIP: 0010:[<ffffffff817cba6e>] [<ffffffff817cba6e>] _raw_spin_lock+0xe/0x80
  [3975766.571807] RSP: 0018:ffff88175588fd08 EFLAGS: 00010202
  [3975766.571809] RAX: 0000000000020000 RBX: ffff881f9c84fe50 RCX: 0000000000000000
  [3975766.571811] RDX: 0000000000000002 RSI: ffff881c7a284e00 RDI: 0000000000000088
  [3975766.571813] RBP: ffff88175588fd08 R08: 0000000000000000 R09: ffffffff81237a85
  [3975766.571814] R10: 0000000000000296 R11: 000000000000f810 R12: 0000000000000000
  [3975766.571816] R13: 0000000000000088 R14: ffff881f9c84fe70 R15: 0000000000000000
  [3975766.571818] FS: 0000000000000000(0000) GS:ffff88202fd20000(0000) knlGS:0000000000000000
  [3975766.571820] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  [3975766.571822] CR2: 0000000000000088 CR3: 0000000001c13000 CR4: 00000000001427f0
  [3975766.571824] Stack:
  [3975766.571825] ffff88175588fd38 ffffffff81235df6 ffff88175588fd38 ffff881f9c84fe50
  [3975766.571828] ffff881c7a284e00 ffff881f9c84fe60 ffff88175588fd78 ffffffff812365d8
  [3975766.571831] ffff88175588fdf8 ffff881f9c84fe50 ffff880a72398618 ffff881c7a284e00
  [3975766.571835] Call Trace:
  [3975766.571841] [<ffffffff81235df6>] fsnotify_destroy_inode_mark+0x46/0xb0
  [3975766.571845] [<ffffffff812365d8>] fsnotify_destroy_mark_locked+0x128/0x1a0
  [3975766.571850] [<ffffffff81236c2e>] fsnotify_clear_marks_by_group_flags+0x7e/0xb0
  [3975766.571854] [<ffffffff81236c73>] fsnotify_clear_marks_by_group+0x13/0x20
  [3975766.571858] [<ffffffff81235cf6>] fsnotify_destroy_group+0x16/0x50
  [3975766.571861] [<ffffffff81237cb6>] inotify_release+0x26/0x60
  [3975766.571868] [<ffffffff811f6aa7>] __fput+0xe7/0x250
  [3975766.571873] [<ffffffff811f6c5e>] ____fput+0xe/0x10
  [3975766.571877] [<ffffffff81093f24>] task_work_run+0xd4/0xf0
  [3975766.571882] [<ffffffff81079378>] do_exit+0x368/0xa50
  [3975766.571886] [<ffffffff81079af5>] do_group_exit+0x45/0xb0
  [3975766.571889] [<ffffffff81079b74>] SyS_exit_group+0x14/0x20
  [3975766.571892] [<ffffffff817cbe8d>] system_call_fastpath+0x16/0x1b
  [3975766.571894] Code: 01 74 dc 83 e0 fe 8d 70 02 0f b7 f6 0f 1f 80 00 00 00 00 eb ca 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 b8 00 00 02 00 <f0> 0f c1 07 89 c2 c1 ea 10 66 39 c2 75 04 5d c3 66 90 41 89 d0
  [3975766.571926] RIP [<ffffffff817cba6e>] _raw_spin_lock+0xe/0x80
  [3975766.571929] RSP <ffff88175588fd08>
  [3975766.571934] CR2: 0000000000000088
  [3975766.571937] ---[ end trace 52f13d4ec1680638 ]---
  [3975766.571939] Fixing recursive fault but reboot is needed!

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-4.2.0-16-generic 4.2.0-16.19
  ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
  Uname: Linux 4.2.0-16-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1.8
  Architecture: amd64
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/timer', '/dev/snd/seq'] failed with exit code 1:
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
  Date: Fri Dec 18 10:49:50 2015
  HibernationDevice: RESUME=UUID=5c13f1ce-e988-46de-9d20-5dbbd2fd9a3d
  InstallationDate: Installed on 2015-07-21 (149 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  MachineType: Hewlett-Packard HP Z620 Workstation
  ProcFB: 0 EFI VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-16-generic root=UUID=ec991f55-a1d1-42a7-a1b3-f4e8f8dd8e99 ro
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-4.2.0-16-generic N/A
   linux-backports-modules-4.2.0-16-generic  N/A
   linux-firmware                            1.143.6
  RfKill:

  SourcePackage: linux
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/19/2013
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: J61 v03.65
  dmi.board.asset.tag: CZC4132S2B
  dmi.board.name: 158A
  dmi.board.vendor: Hewlett-Packard
  dmi.board.version: 0.00
  dmi.chassis.asset.tag: CZC4132S2B
  dmi.chassis.type: 6
  dmi.chassis.vendor: Hewlett-Packard
  dmi.modalias: dmi:bvnHewlett-Packard:bvrJ61v03.65:bd12/19/2013:svnHewlett-Packard:pnHPZ620Workstation:pvr:rvnHewlett-Packard:rn158A:rvr0.00:cvnHewlett-Packard:ct6:cvr:
  dmi.product.name: HP Z620 Workstation
  dmi.sys.vendor: Hewlett-Packard

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