This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:

apport-collect 1979633

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1979633

Title:
  The "bare" snap is the cause of error messages "unable to read
  partition table" and "partition table beyond EOD, truncated"

Status in linux package in Ubuntu:
  Incomplete
Status in snapd package in Ubuntu:
  Invalid

Bug description:
  Hi,

  here is the problem:

  # journalctl | grep loop4
  Jun 23 09:49:45 vougeot kernel: loop4: detected capacity change from 0 to 8
  Jun 23 09:49:45 vougeot kernel: Dev loop4: unable to read RDB block 8
  Jun 23 09:49:45 vougeot kernel:  loop4: unable to read partition table
  Jun 23 09:49:45 vougeot kernel: loop4: partition table beyond EOD, truncated

  The loop4 device is used to mount the "bare" snap:

  $ df -a | grep /snap/bare/
  [...]
  /dev/loop4                                  128       128         0 100% 
/snap/bare/5

  Note that on another system, the loop device will probably have
  another number.  The error messages can be found with the following
  commands:

  # journalctl | grep "unable to read RDB block"
  Jun 23 09:49:45 vougeot kernel: Dev loop4: unable to read RDB block 8

  # journalctl | grep "unable to read partition table"
  Jun 23 09:49:45 vougeot kernel:  loop4: unable to read partition table

  # journalctl | grep "partition table beyond EOD"
  Jun 23 09:49:45 vougeot kernel: loop4: partition table beyond EOD, truncated

  ProblemType: Bug
  DistroRelease: Ubuntu 22.04
  Package: snapd 2.55.5+22.04
  Uname: Linux 5.18.6-051806-generic x86_64
  ApportVersion: 2.20.11-0ubuntu82.1
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CurrentDesktop: KDE
  Date: Thu Jun 23 11:39:16 2022
  Snap.Changes: no changes found
  SourcePackage: snapd
  UpgradeStatus: No upgrade log present (probably fresh install)

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