[Bug 1187560] Re: parted rejects GPT as corrupt, kernel + gdisk think it's ok

[Phillip Susi]

It thinks the crc doesn't match because it still runs the crc on 128
entries even though this table does not have that many.  Basically, it
initializes the count of entries to 128, and doesn't update it from the
value in the header until *after* it checks the crc of the entries.

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https://bugs.launchpad.net/bugs/1187560

Title:
  parted rejects GPT as corrupt, kernel + gdisk think it's ok

Status in “parted” package in Ubuntu:
  Triaged

Bug description:
  parted rejects the GPT on my N4 as invalid:

  # parted /dev/mmcblk0                                       
  GNU Parted 2.3
  Using /dev/mmcblk0
  Welcome to GNU Parted! Type 'help' to view a list of commands.
  (parted) p                                                                
  Error: Both the primary and backup GPT tables are corrupt.  Try making a fresh
  table, and using Parted's rescue feature to recover partitions.

  but the kernel has no problem with this table, and gdisk also works
  with it just fine.  The backup table *is* corrupt, everyone agrees -
  but the primary seems to be valid from the kernel's POV, so parted
  ought to read it.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: parted 2.3-13ubuntu1
  ProcVersionSignature: Ubuntu 3.9.0-3.8-generic 3.9.4
  Uname: Linux 3.9.0-3-generic x86_64
  ApportVersion: 2.10.2-0ubuntu1
  Architecture: amd64
  Date: Tue Jun  4 13:54:22 2013
  InstallationDate: Installed on 2010-09-24 (984 days ago)
  InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release amd64 (20100816.1)
  MarkForUpload: True
  SourcePackage: parted
  UpgradeStatus: Upgraded to saucy on 2013-05-06 (28 days ago)

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