Apparently the bug was not in block cloning, it was just exacerbated by
it. The issue affects older versions of ZFS as well, including 2.1.x.
That is why the upstream OpenZFS project has backported the patch to
2.1.x (Chad linked the PR above). Thus, linux-hwe-6.2 is affected.
** Also affects: linux-hwe-6.2 (Ubuntu)
Importance: Undecided
Status: New
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Packages, which is subscribed to linux-hwe-6.5 in Ubuntu.
https://bugs.launchpad.net/bugs/2044657
Title:
zfs block cloning file system corruption
Status in linux-hwe-6.2 package in Ubuntu:
New
Status in linux-hwe-6.5 package in Ubuntu:
New
Status in zfs-linux package in Ubuntu:
Confirmed
Bug description:
OpenZFS 2.2 reportedly has a bug where block cloning might lead to
file system corruption and data loss. This was fixed in OpenZFS 2.2.1.
Original bug report: https://github.com/openzfs/zfs/issues/15526
and 2.2.1 release notes:
https://github.com/openzfs/zfs/releases/tag/zfs-2.2.1
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