Comment 0 for bug 1755999

While testing the latest xfstest from upstream, the generic/430 test will hang with ext4 test.

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.

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.