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[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

** Changed in: linux (Ubuntu)
   Importance: Undecided => Medium

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https://bugs.launchpad.net/bugs/1281298

Title:
  kernel oops when unplugging usbdux

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  This is a bug which has been fixed upstream:

  https://git.kernel.org/cgit/linux/kernel/git/stable/linux-
  stable.git/commit/drivers/staging/comedi?id=52ef9e7cb317fcb7f8b63f1bec7271e40341ce98

  [  594.994904] Call Trace:
  [  594.994920]  [<ffffffff81709bd5>] dump_stack+0x45/0x56
  [  594.994931]  [<ffffffff8106450d>] warn_slowpath_common+0x7d/0xa0
  [  594.994938]  [<ffffffff8106457c>] warn_slowpath_fmt+0x4c/0x50
  [  594.994946]  [<ffffffff8122eade>] ? sysfs_get_dirent_ns+0x4e/0x70
  [  594.994953]  [<ffffffff8122fdb6>] sysfs_remove_group+0xc6/0xd0
  [  594.994961]  [<ffffffff81489d33>] dpm_sysfs_remove+0x43/0x50
  [  594.994970]  [<ffffffff8147f765>] device_del+0x45/0x1c0
  [  594.994976]  [<ffffffff8147f8fe>] device_unregister+0x1e/0x60
  [  594.994982]  [<ffffffff8147f9bc>] device_destroy+0x3c/0x50
  [  594.994999]  [<ffffffffa042e525>] comedi_free_subdevice_minor+0x75/0xa0 [comedi]
  [  594.995011]  [<ffffffffa042ef68>] comedi_device_detach+0x48/0x160 [comedi]
  [  594.995020]  [<ffffffffa042b2b3>] comedi_device_cleanup+0x33/0x90 [comedi]
  [  594.995029]  [<ffffffffa042b346>] comedi_free_board_dev+0x36/0x50 [comedi]
  [  594.995038]  [<ffffffffa042e3b0>] comedi_release_hardware_device+0x80/0x90 [comedi]
  [  594.995048]  [<ffffffffa042ea63>] comedi_auto_unconfig+0x13/0x20 [comedi]
  [  594.995059]  [<ffffffffa0430112>] comedi_usb_auto_unconfig+0x12/0x20 [comedi]
  [  594.995067]  [<ffffffff81536bb4>] usb_unbind_interface+0x64/0x1c0
  [  594.995075]  [<ffffffff8148347f>] __device_release_driver+0x7f/0xf0
  [  594.995081]  [<ffffffff81483513>] device_release_driver+0x23/0x30
  [  594.995087]  [<ffffffff81482d98>] bus_remove_device+0x108/0x180
  [  594.995093]  [<ffffffff8147f849>] device_del+0x129/0x1c0
  [  594.995100]  [<ffffffff81534590>] usb_disable_device+0xb0/0x290
  [  594.995108]  [<ffffffff8152914d>] usb_disconnect+0xad/0x200
  [  594.995115]  [<ffffffff8152bb95>] hub_port_connect_change+0xd5/0xb50
  [  594.995121]  [<ffffffff81532f94>] ? usb_control_msg+0xd4/0x110
  [  594.995128]  [<ffffffff8152cad4>] hub_events+0x4c4/0xa20
  [  594.995135]  [<ffffffff8152d065>] hub_thread+0x35/0x160
  [  594.995144]  [<ffffffff810a8940>] ? prepare_to_wait_event+0x100/0x100
  [  594.995151]  [<ffffffff8152d030>] ? hub_events+0xa20/0xa20
  [  594.995159]  [<ffffffff810880f2>] kthread+0xd2/0xf0
  [  594.995165]  [<ffffffff81088020>] ? kthread_create_on_node+0x190/0x190
  [  594.995174]  [<ffffffff8171a4fc>] ret_from_fork+0x7c/0xb0
  [  594.995181]  [<ffffffff81088020>] ? kthread_create_on_node+0x190/0x190
  [  594.995186] ---[ end trace 45b9c5978e289ccb ]---

  It would be probably very benefical to commit all bug fixes from the
  latest linux stable for the comedi branch. In order to get this moved
  to the normal driver tree loads of tidying up has happend last year
  which inevitably has lead to new bugs which we sorted in Jan and are
  now in the latest stable kernel.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-8-generic 3.13.0-8.28
  ProcVersionSignature: Ubuntu 3.13.0-8.28-generic 3.13.2
  Uname: Linux 3.13.0-8-generic x86_64
  ApportVersion: 2.13.2-0ubuntu4
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  bp1        1405 F.... pulseaudio
   /dev/snd/controlC0:  bp1        1405 F.... pulseaudio
  Date: Mon Feb 17 21:03:38 2014
  HibernationDevice: RESUME=UUID=b6911a72-ca8c-451f-980b-5f16df4e94f3
  InstallationDate: Installed on 2013-12-09 (69 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20131209)
  IwConfig:
   eth0      no wireless extensions.
   
   lo        no wireless extensions.
  MachineType: Dell Inc. Dimension 9100
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-8-generic root=UUID=781db715-a195-4dda-b877-9f7c87a81821 ro
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-8-generic N/A
   linux-backports-modules-3.13.0-8-generic  N/A
   linux-firmware                            1.124
  RfKill:
   
  SourcePackage: linux
  StagingDrivers: usbduxsigma comedi comedi_fc
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 05/25/2005
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A01
  dmi.board.name: 0X8582
  dmi.board.vendor: Dell Inc.
  dmi.chassis.type: 7
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA01:bd05/25/2005:svnDellInc.:pnDimension9100:pvr:rvnDellInc.:rn0X8582:rvr:cvnDellInc.:ct7:cvr:
  dmi.product.name: Dimension 9100
  dmi.sys.vendor: Dell Inc.

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