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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/1459083

Title:
  umount stuck, then kernel panic after hot-plugging drive

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I'm trying to unmount a volume, which is:
  md raid1 device > dm-crypt > ext4

  The machine (and this md device) has had some drive hot-plugged (which
  wasn't entirely supported) but seemed to do fine.

  I tried unmounting the md/dmcrypt device:

  $ umount /this-device
  [hangs]

  I got this in dmesg, followed by an eventual kernel panic.

  [531002.190479] INFO: task umount:32725 blocked for more than 120 seconds.
  [531002.190482]       Tainted: G         C   L 3.19.0-17-generic #17-Ubuntu
  [531002.190483] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  [531002.190484] umount          D ffff88007f74fc58     0 32725  32536 0x00000004
  [531002.190486]  ffff88007f74fc58 ffff8800b7db9d70 0000000000014200 ffff88007f74ffd8
  [531002.190488]  0000000000014200 ffff88023618f5c0 ffff8800b7db9d70 00000000314bd000
  [531002.190489]  ffff8802314bd070 ffff8802314bd074 ffff8800b7db9d70 00000000ffffffff
  [531002.190491] Call Trace:
  [531002.190497]  [<ffffffff817c54e9>] schedule_preempt_disabled+0x29/0x70
  [531002.190499]  [<ffffffff817c73a5>] __mutex_lock_slowpath+0x95/0x100
  [531002.190501]  [<ffffffff817c7433>] mutex_lock+0x23/0x40
  [531002.190503]  [<ffffffff81234c04>] fsnotify_destroy_mark_locked+0x104/0x1a0
  [531002.190505]  [<ffffffff81234ccf>] fsnotify_destroy_mark+0x2f/0x50
  [531002.190507]  [<ffffffff81234d4c>] fsnotify_destroy_marks+0x5c/0xa0
  [531002.190509]  [<ffffffff81234560>] fsnotify_clear_marks_by_inode+0xb0/0xc0
  [531002.190510]  [<ffffffff812336ae>] __fsnotify_inode_delete+0xe/0x10
  [531002.190512]  [<ffffffff81234820>] fsnotify_unmount_inodes+0x130/0x200
  [531002.190515]  [<ffffffff811f5ab4>] generic_shutdown_super+0x44/0x100
  [531002.190517]  [<ffffffff811f5ea7>] kill_block_super+0x27/0x80
  [531002.190518]  [<ffffffff811f61e9>] deactivate_locked_super+0x49/0x60
  [531002.190519]  [<ffffffff811f663c>] deactivate_super+0x6c/0x80
  [531002.190522]  [<ffffffff81214463>] cleanup_mnt+0x43/0xa0
  [531002.190523]  [<ffffffff81214512>] __cleanup_mnt+0x12/0x20
  [531002.190525]  [<ffffffff81092ce7>] task_work_run+0xb7/0xf0
  [531002.190528]  [<ffffffff81014ff7>] do_notify_resume+0x97/0xb0
  [531002.190530]  [<ffffffff817c9baf>] int_signal+0x12/0x17
  [531022.102516] NMI watchdog: BUG: soft lockup - CPU#2 stuck for 22s! [java:3623]
  [531022.102518] Modules linked in: nfnetlink_queue nfnetlink_log isofs nls_iso8859_1 uas usb_storage nf_conntrack_netlink nf_conntrack nfnetlink nls_utf8 btrfs ufs qnx4 hfsplus hfs minix ntfs msdos jfs xf
  s libcrc32c cpuid zram lz4_compress ip6table_filter ip6_tables hid_apple xt_multiport iptable_filter ip_tables x_tables cfg80211 binfmt_misc dm_crypt intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powercl
  amp snd_usb_audio kvm_intel snd_usbmidi_lib kvm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 dm_multipath lrw scsi_dh gf128mul ipmi_ssif glue_helper ablk_helper cryptd serio_ra
  w xgifb(C) ipmi_si lpc_ich 8250_fintek mac_hid tpm_infineon ipmi_msghandler snd_hda_codec_hdmi snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi
  [531022.102544]  snd_seq snd_seq_device snd_timer snd soundcore ie31200_edac edac_core shpchp parport_pc ppdev lp parport w83627ehf hwmon_vid coretemp tcp_htcp sch_fq_codel raid10 raid456 async_raid6_reco
  v async_memcpy async_pq async_xor async_tx xor raid6_pq raid0 multipath linear raid1 hid_generic usbhid hid amdkfd amd_iommu_v2 radeon i2c_algo_bit ttm e1000e drm_kms_helper psmouse ptp pata_acpi drm pps_
  core video
  [531022.102561] CPU: 2 PID: 3623 Comm: java Tainted: G         C   L 3.19.0-17-generic #17-Ubuntu
  [531022.102562] Hardware name: To be filled by O.E.M. To be filled by O.E.M./P8B-X series, BIOS 5009 11/05/2012                                                                                    [17/1919]
  [531022.102563] task: ffff880231e4ebf0 ti: ffff8800aa444000 task.ti: ffff8800aa444000
  [531022.102564] RIP: 0010:[<ffffffff81234b19>]  [<ffffffff81234b19>] fsnotify_destroy_mark_locked+0x19/0x1a0
  [531022.102566] RSP: 0018:ffff8800aa447de8  EFLAGS: 00000282
  [531022.102567] RAX: 00000000ffffffff RBX: 0000000180270024 RCX: 0000000180270024
  [531022.102568] RDX: ffff8800b7283e60 RSI: ffff8802314bd000 RDI: ffff8800b7283e50
  [531022.102569] RBP: ffff8800aa447df8 R08: 00000000305bb901 R09: 0000000180270024
  [531022.102569] R10: ffff88023fc98f20 R11: ffff8801305bb958 R12: 00000000305bb901
  [531022.102570] R13: 0000000180270024 R14: ffff88023fc98f20 R15: ffff8801305bb958
  [531022.102571] FS:  0000000000000000(0000) GS:ffff88023fc80000(0063) knlGS:00000000a8dbbb40
  [531022.102572] CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
  [531022.102573] CR2: 00007f06b5fbf148 CR3: 000000023398a000 CR4: 00000000001407e0
  [531022.102573] Stack:
  [531022.102574]  00000000ffffffff ffff8802314bd0a0 ffff8800aa447e48 ffffffff8123527e
  [531022.102575]  00000000a971de88 ffff8802314bd070 ffff8800aa447ed8 ffff8802314bd000
  [531022.102577]  0000000000000010 ffff880235543540 ffff880236156a20 ffff8800afc40a80
  [531022.102578] Call Trace:
  [531022.102581]  [<ffffffff8123527e>] fsnotify_clear_marks_by_group_flags+0x7e/0xb0
  [531022.102582]  [<ffffffff812352c3>] fsnotify_clear_marks_by_group+0x13/0x20
  [531022.102584]  [<ffffffff81234346>] fsnotify_destroy_group+0x16/0x50
  [531022.102586]  [<ffffffff81236306>] inotify_release+0x26/0x60
  [531022.102588]  [<ffffffff811f53e7>] __fput+0xe7/0x250
  [531022.102590]  [<ffffffff811f559e>] ____fput+0xe/0x10
  [531022.102592]  [<ffffffff81092ce7>] task_work_run+0xb7/0xf0
  [531022.102593]  [<ffffffff81014ff7>] do_notify_resume+0x97/0xb0
  [531022.102595]  [<ffffffff817c9baf>] int_signal+0x12/0x17
  [531022.102596] Code: 0b 02 48 8b 52 28 48 85 d2 75 ef 5d c3 0f 1f 44 00 00 0f 1f 44 00 00 8b 46 70 83 f8 01 0f 84 7f 01 00 00 55 48 89 e5 41 57 41 56 <4c> 8d 77 20 41 55 41 54 53 48 89 fb 49 89 f4 4c 89
  f7 48 83 ec
  [531050.102640] NMI watchdog: BUG: soft lockup - CPU#2 stuck for 22s! [java:3623]
  [531050.102643] Modules linked in: nfnetlink_queue nfnetlink_log isofs nls_iso8859_1 uas usb_storage nf_conntrack_netlink nf_conntrack nfnetlink nls_utf8 btrfs ufs qnx4 hfsplus hfs minix ntfs msdos jfs xf
  s libcrc32c cpuid zram lz4_compress ip6table_filter ip6_tables hid_apple xt_multiport iptable_filter ip_tables x_tables cfg80211 binfmt_misc dm_crypt intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powercl
  amp snd_usb_audio kvm_intel snd_usbmidi_lib kvm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 dm_multipath lrw scsi_dh gf128mul ipmi_ssif glue_helper ablk_helper cryptd serio_ra
  w xgifb(C) ipmi_si lpc_ich 8250_fintek mac_hid tpm_infineon ipmi_msghandler snd_hda_codec_hdmi snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi
  [531050.102671]  snd_seq snd_seq_device snd_timer snd soundcore ie31200_edac edac_core shpchp parport_pc ppdev lp parport w83627ehf hwmon_vid coretemp tcp_htcp sch_fq_codel raid10 raid456 async_raid6_reco
  v async_memcpy async_pq async_xor async_tx xor raid6_pq raid0 multipath linear raid1 hid_generic usbhid hid amdkfd amd_iommu_v2 radeon i2c_algo_bit ttm e1000e drm_kms_helper psmouse ptp pata_acpi drm pps_
  core video
  [531050.102689] CPU: 2 PID: 3623 Comm: java Tainted: G         C   L 3.19.0-17-generic #17-Ubuntu
  [531050.102690] Hardware name: To be filled by O.E.M. To be filled by O.E.M./P8B-X series, BIOS 5009 11/05/2012
  [531050.102691] task: ffff880231e4ebf0 ti: ffff8800aa444000 task.ti: ffff8800aa444000
  [531050.102692] RIP: 0010:[<ffffffff81234949>]  [<ffffffff81234949>] fsnotify_put_mark+0x9/0x40
  [531050.102697] RSP: 0018:ffff8800aa447e00  EFLAGS: 00000296
  [531050.102698] RAX: 00000000ffff8800 RBX: ffffffffffffff10 RCX: 0000000180270024
  [531050.102699] RDX: 000000000000ef1e RSI: ffff8802314bd000 RDI: ffff8800b7283e50
  [531050.102700] RBP: ffff8800aa447e48 R08: 00000000305bb901 R09: 0000000180270024
  [531050.102701] R10: ffff88023fc98f20 R11: ffff8801305bb958 R12: ffff8802314bd000
  [531050.102701] R13: ffff8800b7283e60 R14: 0000000180270024 R15: 0000000059785978
  [531050.102702] FS:  0000000000000000(0000) GS:ffff88023fc80000(0063) knlGS:00000000a8dbbb40
  [531050.102703] CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
  [531050.102704] CR2: 00007f06b5fbf148 CR3: 000000023398a000 CR4: 00000000001407e0
  [531050.102705] Stack:
  [531050.102705]  ffffffff81235286 00000000a971de88 ffff8802314bd070 ffff8800aa447ed8
  [531050.102707]  ffff8802314bd000 0000000000000010 ffff880235543540 ffff880236156a20
  [531050.102708]  ffff8800afc40a80 ffff8800aa447e58 ffffffff812352c3 ffff8800aa447e78
  [531050.102710] Call Trace:
  [531050.102713]  [<ffffffff81235286>] ? fsnotify_clear_marks_by_group_flags+0x86/0xb0
  [531050.102715]  [<ffffffff812352c3>] fsnotify_clear_marks_by_group+0x13/0x20
  [531050.102717]  [<ffffffff81234346>] fsnotify_destroy_group+0x16/0x50
  [531050.102719]  [<ffffffff81236306>] inotify_release+0x26/0x60
  [531050.102722]  [<ffffffff811f53e7>] __fput+0xe7/0x250
  [531050.102724]  [<ffffffff811f559e>] ____fput+0xe/0x10
  [531050.102726]  [<ffffffff81092ce7>] task_work_run+0xb7/0xf0
  [531050.102729]  [<ffffffff81014ff7>] do_notify_resume+0x97/0xb0
  [531050.102731]  [<ffffffff817c9baf>] int_signal+0x12/0x17
  [531050.102732] Code: 42 20 00 00 00 00 c7 42 04 01 00 00 00 48 89 72 58 5d c3 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 f0 ff 4f 04 <74> 05 c3 0f 1f 40 00 55 48 89 e5 53 48 89 fb 48 83
  ec 08 48 8b

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-generic 3.19.0.18.17
  ProcVersionSignature: Ubuntu 3.19.0-17.17-generic 3.19.6
  Uname: Linux 3.19.0-17-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  lightdm   27133 F.... pulseaudio
  Date: Tue May 26 22:11:23 2015
  EcryptfsInUse: Yes
  IwConfig:
   eth0      no wireless extensions.
   
   eth1      no wireless extensions.
   
   lo        no wireless extensions.
  Lsusb:
   Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
   Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: To be filled by O.E.M. To be filled by O.E.M.
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB:
   0 radeondrmfb
   1 XGI
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-17-generic root=/dev/mapper/hybrid--root-root ro nomdmonddf nomdmonisw allow-discards root_trim=yes nomdmonddf nomdmonisw init=/sbin/upstart
  PulseList:
   Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied
   No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-17-generic N/A
   linux-backports-modules-3.19.0-17-generic  N/A
   linux-firmware                             1.143.1
  RfKill:
   
  SourcePackage: linux
  StagingDrivers: xgifb
  UpgradeStatus: Upgraded to vivid on 2013-10-24 (579 days ago)
  dmi.bios.date: 11/05/2012
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 5009
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: P8B-X series
  dmi.board.vendor: ASUSTeK Computer INC.
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 17
  dmi.chassis.vendor: To Be Filled By O.E.M.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr5009:bd11/05/2012:svnTobefilledbyO.E.M.:pnTobefilledbyO.E.M.:pvrTobefilledbyO.E.M.:rvnASUSTeKComputerINC.:rnP8B-Xseries:rvr:cvnToBeFilledByO.E.M.:ct17:cvrToBeFilledByO.E.M.:
  dmi.product.name: To be filled by O.E.M.
  dmi.product.version: To be filled by O.E.M.
  dmi.sys.vendor: To be filled by O.E.M.

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