Public bug reported:
Writing on a loopback file within zfs folder leads system deadlock
1. zpool import -R /media vpool
2. dd if=/dev/zero of=/media/disk.img bs=1G count=1
3. mkfs.ext4 /media/disk.img
4. mount /media/disk.img /mnt
5. cp -a /var/log /mnt
Then system hangs, process cp can NOT be interrupted by ctrl+C. System
can ONLY be resumed by a power unplugging.
ProblemType: Bug
DistroRelease: Ubuntu 25.04
Package: zfsutils-linux 2.3.1-1ubuntu2
ProcVersionSignature: Ubuntu 6.14.0-27.27-generic 6.14.6
Uname: Linux 6.14.0-27-generic x86_64
NonfreeKernelModules: zfs
ApportVersion: 2.32.0-0ubuntu5.3
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Wed Aug 6 17:15:50 2025
SourcePackage: zfs-linux
UpgradeStatus: Upgraded to plucky on 2025-07-28 (9 days ago)
modified.conffile..etc.sudoers.d.zfs: [inaccessible: [Errno 13] Permission
denied: '/etc/sudoers.d/zfs']
** Affects: zfs-linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug plucky wayland-session
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https://bugs.launchpad.net/bugs/2119623
Title:
System hangs on writing loopback file within zfs folder
Status in zfs-linux package in Ubuntu:
New
Bug description:
Writing on a loopback file within zfs folder leads system deadlock
1. zpool import -R /media vpool
2. dd if=/dev/zero of=/media/disk.img bs=1G count=1
3. mkfs.ext4 /media/disk.img
4. mount /media/disk.img /mnt
5. cp -a /var/log /mnt
Then system hangs, process cp can NOT be interrupted by ctrl+C. System
can ONLY be resumed by a power unplugging.
ProblemType: Bug
DistroRelease: Ubuntu 25.04
Package: zfsutils-linux 2.3.1-1ubuntu2
ProcVersionSignature: Ubuntu 6.14.0-27.27-generic 6.14.6
Uname: Linux 6.14.0-27-generic x86_64
NonfreeKernelModules: zfs
ApportVersion: 2.32.0-0ubuntu5.3
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Wed Aug 6 17:15:50 2025
SourcePackage: zfs-linux
UpgradeStatus: Upgraded to plucky on 2025-07-28 (9 days ago)
modified.conffile..etc.sudoers.d.zfs: [inaccessible: [Errno 13] Permission
denied: '/etc/sudoers.d/zfs']
To manage notifications about this bug go to:
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