Hey Brendan, Thanks for reporting this bug. It looks like the crashdump files didn't come through?
Could you please try to reproduce with the 5.8 kernel from Groovy on your Bionic install? These are the steps to install it. Please remove the .list file as soon as you install the packages, to avoid other packages from Groovy to be installed unintendly. $ echo 'deb http://archive.ubuntu.com/ubuntu groovy main restricted' | sudo tee /etc/apt/sources.list.d/groovy.list deb http://archive.ubuntu.com/ubuntu groovy main restricted $ sudo apt update $ sudo apt install --dry-run linux-{image,modules-extra,headers}-5.8.0-18-generic $ sudo rm /etc/apt/sources.list.d/groovy.list Once you're done with testing, you can remove the installed packages with: $ sudo apt purge linux-{image,modules,modules- extra,headers}-5.8.0-18-generic Please note there's an additional linux-modules package in this list (which is a pulled as a dependency in the install command.) You can also specify other packages if any are also pulled during the install step, but testing it here it doesn't look like any other packages are pulled in. Thanks, Mauricio -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1895563 Title: Kernel Oops: Rsyncing to bcache device w/o backing cache kernel panic Status in linux package in Ubuntu: Confirmed Bug description: Platform details: 1) version.log attached 2) lspci-vnvn.log attached 3) lsb_release -rd Description: Ubuntu 18.04.5 LTS Release: 18.04 4) apt-cache policy bcache-tools bcache-tools: Installed: 1.0.8-2ubuntu0.18.04.1 Candidate: 1.0.8-2ubuntu0.18.04.1 Version table: *** 1.0.8-2ubuntu0.18.04.1 500 500 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages 100 /var/lib/dpkg/status 1.0.8-2build1 500 500 http://archive.ubuntu.com/ubuntu bionic/main amd64 Packages 5) uname -a: Linux timber4 4.15.0-117-generic #118-Ubuntu SMP Fri Sep 4 20:02:41 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux Short problem description: Rsyncing from a 1.4TB home dir to a an new filesystem on a bcache device without an attached cache eventually results in kernel panic. What I expected to happen: no kernel panic. Long problem description: 1) Devices / Filesystems: bfd01: 8*4TB configured as RAID6 using md LVM2 volume group. bfd02: 8*4TB configured as RAID6 using Dell PERC H810 LVM2 volume group. The tree contains 1069685 files / dirs. 2) Steps to reproduce: # Make the device, format and mount it make-bcache -B /dev/vg-bfd02/delme01_bc mkfs.xfs -f -L delme01bc /dev/bcache0 mount /dev/bcache0 /dev/bfd02/delme01bc # Rsync flags="-a --delete" ; info_cmd="--info=progress2" ; excludes=""; src=/mnt/bfd01/delme01 ; tgt=/mnt/bfd02/delme01bc/ ; time rsync $flags $info_cmd $excludes $src/ $tgt/ ... # eventually kernel panic Using incremental rsync it will kernel panic after reading about 21GB. # If instead I use non-incremental rsync it will kernel panic after reading about 1.2-1.3TB. flags="--no-inc-recursive -ax -HAXS --delete" ; info_cmd="--info=progress2" ; excludes=""; ... # eventually kernel panic Additional detail: 1) I was *not* able to reproduce if bfd01/delm01bc was a target and bfd02 was the source e.g. # Rsync flags="-a --delete" ; info_cmd="--info=progress2" ; excludes=""; src=/mnt/bfd02/delme01 ; tgt=/mnt/bfd01/delme01bc/ ; time rsync $flags $info_cmd $excludes $src/ $tgt/ ... # rsync completes successfully 2) I was *not* able to reproduce if I attached and then detached a cache set: ceho 'd3b93488-714e-4efa-af94-cd80fd2db11f' > /sys/block/bcache0/bcache/attach echo 1 > /sys/block/bcache0/bcache/detach ... time rsync $flags $info_cmd $excludes $src/ $tgt/ ... # rsync completes successfully I have 11 compressed kernel crash dumps. I will upload 3 after filing this. Let me know if you want the other 8. ProblemType: KernelCrash DistroRelease: Ubuntu 18.04 Package: linux-image-4.15.0-117-generic 4.15.0-117.118 ProcVersionSignature: Ubuntu 4.15.0-117.118-generic 4.15.18 Uname: Linux 4.15.0-117-generic x86_64 AlsaDevices: total 0 crw-rw---- 1 root audio 116, 1 Sep 13 12:53 seq crw-rw---- 1 root audio 116, 33 Sep 13 12:53 timer AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay' ApportVersion: 2.20.9-0ubuntu7.17 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: Date: Sat Sep 12 09:51:37 2020 HibernationDevice: RESUME=none IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig' MachineType: Dell Inc. PowerEdge R620 PciMultimedia: ProcFB: 0 mgadrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-117-generic root=UUID=de68d15b-3948-4666-9bc5-5cbecc83971c ro maybe-ubiquity crashkernel=512M-:512M RelatedPackageVersions: linux-restricted-modules-4.15.0-117-generic N/A linux-backports-modules-4.15.0-117-generic N/A linux-firmware 1.173.19 RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 12/06/2019 dmi.bios.vendor: Dell Inc. dmi.bios.version: 2.9.0 dmi.board.name: 0KCKR5 dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 23 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr2.9.0:bd12/06/2019:svnDellInc.:pnPowerEdgeR620:pvr:rvnDellInc.:rn0KCKR5:rvrA00:cvnDellInc.:ct23:cvr: dmi.product.name: PowerEdge R620 dmi.sys.vendor: Dell Inc. --- ProblemType: Bug AlsaDevices: total 0 crw-rw---- 1 root audio 116, 1 Sep 13 12:53 seq crw-rw---- 1 root audio 116, 33 Sep 13 12:53 timer AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay' ApportVersion: 2.20.9-0ubuntu7.17 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: DistroRelease: Ubuntu 18.04 HibernationDevice: RESUME=none IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig' MachineType: Dell Inc. PowerEdge R620 Package: linux (not installed) PciMultimedia: ProcFB: 0 mgadrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-117-generic root=UUID=de68d15b-3948-4666-9bc5-5cbecc83971c ro maybe-ubiquity crashkernel=512M-:512M ProcVersionSignature: Ubuntu 4.15.0-117.118-generic 4.15.18 RelatedPackageVersions: linux-restricted-modules-4.15.0-117-generic N/A linux-backports-modules-4.15.0-117-generic N/A linux-firmware 1.173.19 RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill' Tags: bionic uec-images Uname: Linux 4.15.0-117-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: _MarkForUpload: True dmi.bios.date: 12/06/2019 dmi.bios.vendor: Dell Inc. dmi.bios.version: 2.9.0 dmi.board.name: 0KCKR5 dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 23 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr2.9.0:bd12/06/2019:svnDellInc.:pnPowerEdgeR620:pvr:rvnDellInc.:rn0KCKR5:rvrA00:cvnDellInc.:ct23:cvr: dmi.product.name: PowerEdge R620 dmi.sys.vendor: Dell Inc. --- ProblemType: Bug AlsaDevices: total 0 crw-rw---- 1 root audio 116, 1 Sep 13 12:53 seq crw-rw---- 1 root audio 116, 33 Sep 13 12:53 timer AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay' ApportVersion: 2.20.9-0ubuntu7.17 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: DistroRelease: Ubuntu 18.04 HibernationDevice: RESUME=none IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig' MachineType: Dell Inc. PowerEdge R620 Package: linux (not installed) PciMultimedia: ProcFB: 0 mgadrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-117-generic root=UUID=de68d15b-3948-4666-9bc5-5cbecc83971c ro maybe-ubiquity crashkernel=512M-:512M ProcVersionSignature: Ubuntu 4.15.0-117.118-generic 4.15.18 RelatedPackageVersions: linux-restricted-modules-4.15.0-117-generic N/A linux-backports-modules-4.15.0-117-generic N/A linux-firmware 1.173.19 RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill' Tags: bionic uec-images Uname: Linux 4.15.0-117-generic x86_64 UnreportableReason: This report is about a package that is not installed. UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: _MarkForUpload: False dmi.bios.date: 12/06/2019 dmi.bios.vendor: Dell Inc. dmi.bios.version: 2.9.0 dmi.board.name: 0KCKR5 dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 23 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr2.9.0:bd12/06/2019:svnDellInc.:pnPowerEdgeR620:pvr:rvnDellInc.:rn0KCKR5:rvrA00:cvnDellInc.:ct23:cvr: dmi.product.name: PowerEdge R620 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1895563/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
