** Changed in: linux (Ubuntu Xenial)
     Assignee: (unassigned) => Joseph Salisbury (jsalisbury)

** Changed in: linux (Ubuntu)
     Assignee: (unassigned) => Joseph Salisbury (jsalisbury)

** Changed in: linux (Ubuntu Xenial)
       Status: Triaged => In Progress

** Changed in: linux (Ubuntu)
       Status: Triaged => In Progress

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https://bugs.launchpad.net/bugs/1789653

Title:
  regression with EXT4 file systems and meta_bg flag

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Xenial:
  In Progress

Bug description:
  Hello,

  In 16.04 lts (Ubuntu 4.4.0-134.160-generic 4.4.140) with all
  partitions in ext4 with flag meta_bg :

  kernel: [ 1905.799557] EXT4-fs (dm-7): ext4_check_descriptors: Block bitmap 
for group 0 overlaps block group descriptors
  kernel: [ 1905.799858] EXT4-fs (dm-7): group descriptors corrupted!

  Go back with the kernel 4.4.0-133-generic and all partitions mount
  correctly.

  It looks like this:
  
https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=44de022c4382541cebdd6de4465d1f4f465ff1dd

  The patch is available in 4.4.147 (https://lwn.net/Articles/762083/)

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