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[Jürg Häfliger <1755999@xxxxxxxxxxxxxxxxxx>]

** Tags added: kernel-daily-bug

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https://bugs.launchpad.net/bugs/1755999

Title:
  Reproducible hang in generic/430 with xfstest from upstream

Status in ubuntu-kernel-tests:
  Confirmed
Status in linux package in Ubuntu:
  Triaged
Status in xfsprogs package in Ubuntu:
  New
Status in linux source package in Bionic:
  New
Status in xfsprogs source package in Bionic:
  New

Bug description:
  While testing the latest xfstest from upstream, the generic/430 test
  will hang, no matter using ext4/xfs/btrfs.

  It looks like this issue was caused by the following command to copy beyond the file:
  /usr/sbin/xfs_io -i -f -c "copy_range -s 4000 -l 2000 /home/ubuntu/test/test-430/file" "/home/ubuntu/test/test-430/beyond"

  The copied file will have a correct MD5 as expected.
  e68d4a150c4e42f4f9ea3ffe4c9cf4ed  beyond

  But the command will never return.

  The file size of test-430/file is 5000, so a copy_range call with
  source offset 4000 with length 1000 works, but > 1000 does not.

  Steps:
   1. Deploy a node with Bionic (should have a /dev/sdb available for the test)
   2. Run:
      sudo apt-get install git python-minimal -y
      git clone --depth=1 https://github.com/Cypresslin/autotest-client-tests.git -b kteam-xfstest-upstream
      git clone --depth=1 git://kernel.ubuntu.com/ubuntu/autotest
      rm -fr autotest/client/tests
      ln -sf ~/autotest-client-tests autotest/client/tests
   3. Run the test with the following command:
      AUTOTEST_PATH=/home/ubuntu/autotest sudo -E autotest/client/autotest-local --verbose autotest/client/tests/

  (The test suite can be built manually, but it's easier to do this with
  autotest framework)

  To run this test solely after the test partition has been creation on /dev/sdb:
      mkdir /home/ubuntu/test
      cd autotest/client/tmp/xfstests/src/xfstests-bld/xfstests-dev
      sudo su
      export TEST_DIR=/home/ubuntu/test
      export TEST_DEV=/dev/sdb1
      ./check generic/430

  Tested with the latest mainline kernel, 4.16.0-041600rc5-generic, and
  the bug still exist.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: linux-image-4.15.0-10-generic 4.15.0-10.11 [modified: boot/vmlinuz-4.15.0-10-generic]
  ProcVersionSignature: User Name 4.15.0-10.11-generic 4.15.3
  Uname: Linux 4.15.0-10-generic x86_64
  ApportVersion: 2.20.8-0ubuntu10
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  ubuntu     1148 F.... pulseaudio
   /dev/snd/controlC1:  ubuntu     1148 F.... pulseaudio
  Date: Thu Mar 15 14:24:46 2018
  InstallationDate: Installed on 2018-03-15 (0 days ago)
  InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180228)
  MachineType: Dell Inc. Dell Precision M3800
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-10-generic.efi.signed root=UUID=d1980d27-9063-4d92-aa10-1fb240453d8d ro quiet splash vt.handoff=1
  RelatedPackageVersions:
   linux-restricted-modules-4.15.0-10-generic N/A
   linux-backports-modules-4.15.0-10-generic  N/A
   linux-firmware                             1.172
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 10/14/2014
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A07
  dmi.board.name: Dell Precision M3800
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A07
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: Not Specified
  dmi.modalias: dmi:bvnDellInc.:bvrA07:bd10/14/2014:svnDellInc.:pnDellPrecisionM3800:pvrA07:rvnDellInc.:rnDellPrecisionM3800:rvrA07:cvnDellInc.:ct8:cvrNotSpecified:
  dmi.product.name: Dell Precision M3800
  dmi.product.version: A07
  dmi.sys.vendor: Dell Inc.

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