kernel-packages team mailing list archive

[Rolf Leggewie <593086@xxxxxxxxxxxxxxxxxx>]

lucid has seen the end of its life and is no longer receiving any
updates. Marking the lucid task for this ticket as "Won't Fix".

** Changed in: linux (Ubuntu Lucid)
       Status: Triaged => Won't Fix

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/593086

Title:
  Silent wraparound on > 2 TB LVM snapshots in lucid and karmic

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Lucid:
  Won't Fix

Bug description:
  Ubuntu kernels silently wrap access to disk locations above 2 TB back
  around to zero.  This can easily be reproduced using lvm to create a
  thin provisioned virtual disk:

  lvcreate -s -n thin -L 1g --virtualsize 3t vg0

  mke2fs -t ext4 -E lazy_itable_init /dev/vg0/thin
  e2fsck -f /dev/vg0/thin

  Fsck will find errors in the bitmap because it is actually reading the
  superblock instead of the allocation bitmap situated just after the 2
  tb mark.

  This affects Karmic and Lucid and will cause data loss and severe
  filesystem corruption that may go unnoticed for some time, if someone
  creates a snapshot of a 2TB + size logical volume.  It was fixed
  upstream as of 2.6.33.

  See comment #26 for details on the problem and what needs done to fix
  it.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/593086/+subscriptions