@xyv41: 
As mentioned in the last comment, the fix is only a cherry-pick so the version 
will go from 2.1.5-1ubuntu6~22.04.2 to 2.1.5-1ubuntu6~22.04.3 because upgrading 
to 2.1.14 would bear the risk that other bugs might get fixed, too.

Regarding the release date: for mantic it took about 7 days from verification 
until release. I don’t know if that's an automated process, but in that case 
the fix should go out in the next few days. 
On the other hand, in post #73 it says that the SRU-Team has been unsubscribed 
from this bug-report, so maybe they don’t even know that the verification for 
jammy has been completed and the fix will just get stalled.

Additionally, even when (or if?) the committed package gets released,
this only affects the userland tools as well as the dkms-build kernel
modules. If you (like 99,9% of all Ubuntu users) use the pre-bundled
kernel module, then this also needs an update of the kernel package as
well.

To give you an idea: The fix for mantic was committed on February, 2nd
and released on the 12th. However, it is still not included in the
current kernel package (6.5.0.17.19) nor in the -proposed package
(6.5.0.25.25) which is yet to be released. So based on the recent update
cycles I suspect it will not reach the end-user until mid of march (for
matic!!!).

Therefore, I am expecting that it will be at least one more month (more
likely 6 weeks) or so until the jammy fix reaches the end-user. Then we
will have a fix found (December, 1st) to fix released time of around 5
months. Quite a good result for a one-line-Hotfix.

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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to zfs-linux in Ubuntu.
https://bugs.launchpad.net/bugs/2044657

Title:
  Multiple data corruption issues in zfs

Status in zfs-linux package in Ubuntu:
  Fix Released
Status in zfs-linux source package in Xenial:
  Confirmed
Status in zfs-linux source package in Bionic:
  Confirmed
Status in zfs-linux source package in Focal:
  Fix Committed
Status in zfs-linux source package in Jammy:
  Fix Committed
Status in zfs-linux source package in Lunar:
  Won't Fix
Status in zfs-linux source package in Mantic:
  Fix Released
Status in zfs-linux source package in Noble:
  Fix Released

Bug description:
  [ Impact ]

   * Multiple data corruption issues have been identified and fixed in
  ZFS. Some of them, at varying real-life reproducibility frequency have
  been deterimed to affect very old zfs releases. Recommendation is to
  upgrade to 2.2.2 or 2.1.14 or backport dnat patch alone. This is to
  ensure users get other potentially related fixes and runtime tunables
  to possibly mitigate other bugs that are related and are being fixed
  upstream for future releases.

   * For jammy the 2.1.14 upgrade will bring HWE kernel support and also
  compatiblity/support for hardened kernel builds that mitigate SLS
  (straight-line-speculation).

   * In the absence of the upgrade a cherry-pick will address this
  particular popular issue alone - without addressing other issues
  w.r.t. Redbleed / SLS, bugfixes around trim support, and other related
  improvements that were discovered and fixed around the same time as
  this popular issue.

  [ Test Plan ]

   * !!! Danger !!! use reproducer from
  https://zfsonlinux.topicbox.com/groups/zfs-discuss/T12876116b8607cdb
  and confirm if that issue is resolved or not. Do not run on production
  ZFS pools / systems.

   * autopkgtest pass (from https://ubuntu-archive-
  team.ubuntu.com/proposed-migration/ )

   * adt-matrix pass (from https://kernel.ubuntu.com/adt-matrix/ )

   * kernel regression zfs testsuite pass (from Kernel team RT test
  results summary, private)

   * zsys integration test pass (upgrade of zsys installed systems for
  all releases)

   * zsys install test pass (for daily images of LTS releases only that
  have such installer support, as per iso tracker test case)

   * LXD (ping LXD team to upgrade vendored in tooling to 2.2.2 and
  2.1.14, and test LXD on these updated kernels)

  [ Where problems could occur ]

   * Upgrade to 2.1.14 on jammy with SLS mitigations compatiblity will
  introduce slight slow down on amd64 (for hw accelerated assembly code-
  paths only in the encryption primitives)

   * Uncertain of the perfomance impact of the extra checks in dnat
  patch fix itself. Possibly affecting speed of operation, at the
  benefit of correctness.

   * The cherry-picked patch ("dnat"? dnode) changes the dirty data check, but
     only makes it stronger and not weaker, thus if it were incorrect, likely
     only performance would be impacted (and it is unlikely to be incorrect
     given upstream reviews and attention to data corruption issues; also,
     there are no additional changes to that function upstream)

  [ Other Info ]

   * https://github.com/openzfs/zfs/pull/15571 is most current
  consideration of affairs

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