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[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

I see you are hitting this bug with the latest upstream kernel.  Was
there an earlier kernel that did not exhibit this bug?

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

** Tags added: kernel-bug-exists-upstream

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https://bugs.launchpad.net/bugs/1348716

Title:
  kernel oops writing image to sd card

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  Writing a 3G image to an SD card led to an oops (on both occasions I
  tried it):

  $ cat foo.img | sudo dd bs=16M of=/dev/mmcblk0

  [36467.181234] Call Trace:
  [36467.181245]  [<ffffffff827596d9>] schedule_preempt_disabled+0x29/0x70
  [36467.181251]  [<ffffffff8275b525>] __mutex_lock_slowpath+0xd5/0x1d0
  [36467.181278]  [<ffffffff8275b63f>] mutex_lock+0x1f/0x2f
  [36467.181283]  [<ffffffff822066d3>] __blkdev_get+0x63/0x4c0
  [36467.181287]  [<ffffffff82206cf5>] blkdev_get+0x1c5/0x340
  [36467.181291]  [<ffffffff82206f1b>] blkdev_open+0x5b/0x80
  [36467.181296]  [<ffffffff821cd32f>] do_dentry_open+0x1ff/0x350
  [36467.181300]  [<ffffffff82206ec0>] ? blkdev_get_by_dev+0x50/0x50
  [36467.181303]  [<ffffffff821cd5c9>] vfs_open+0x49/0x50
  [36467.181309]  [<ffffffff821dca94>] do_last+0x554/0x1210
  [36467.181317]  [<ffffffff823226bb>] ? apparmor_file_alloc_security+0x5b/0x180
  [36467.181322]  [<ffffffff821dea1b>] path_openat+0xbb/0x620
  [36467.181328]  [<ffffffff82384d66>] ? sprintf+0x46/0x50
  [36467.181333]  [<ffffffff821e048a>] do_filp_open+0x3a/0x90
  [36467.181340]  [<ffffffff821ecff7>] ? __alloc_fd+0xa7/0x130
  [36467.181345]  [<ffffffff821ceea9>] do_sys_open+0x129/0x280
  [36467.181349]  [<ffffffff82021b55>] ? syscall_trace_enter+0x145/0x250
  [36467.181353]  [<ffffffff821cf01e>] SyS_open+0x1e/0x20
  [36467.181359]  [<ffffffff8275d43f>] tracesys+0xe1/0xe6

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: linux-image-generic 3.16.0.5.6
  ProcVersionSignature: Ubuntu 3.16.0-5.10-generic 3.16.0-rc6
  Uname: Linux 3.16.0-5-generic x86_64
  ApportVersion: 2.14.4-0ubuntu2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  james      3817 F.... pulseaudio
   /dev/snd/controlC1:  james      3817 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Fri Jul 25 17:23:47 2014
  HibernationDevice: RESUME=UUID=db600bbe-faca-41f4-9338-c3e8e227599a
  InstallationDate: Installed on 2014-04-11 (104 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Daily amd64 (20140409)
  MachineType: LENOVO 20AQCTO1WW
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.16.0-5-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.16.0-5-generic N/A
   linux-backports-modules-3.16.0-5-generic  N/A
   linux-firmware                            1.132
  SourcePackage: linux
  UpgradeStatus: Upgraded to utopic on 2014-05-08 (78 days ago)
  dmi.bios.date: 02/10/2014
  dmi.bios.vendor: LENOVO
  dmi.bios.version: GJET71WW (2.21 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20AQCTO1WW
  dmi.board.vendor: LENOVO
  dmi.board.version: 0B98405 STD
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvrGJET71WW(2.21):bd02/10/2014:svnLENOVO:pn20AQCTO1WW:pvrThinkPadT440s:rvnLENOVO:rn20AQCTO1WW:rvr0B98405STD:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 20AQCTO1WW
  dmi.product.version: ThinkPad T440s
  dmi.sys.vendor: LENOVO

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