group.of.nepali.translators team mailing list archive

[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

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

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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:
  Fix Released
Status in linux source package in Xenial:
  Fix Released

Bug description:
  == SRU Justification ==
  A regression was introduced where ext4_check_descriptors() was getting
  called before s_gdb_count was initialized.  This regression was
  introduced to Xenial in 4.4.0-134.  This is fixed by mainline commit
  44de022c4382.

  Commit 44de022c4382 was also cc'd to upstream stable.  However, it has
  not made it's way into Xenial via stable updates as of yet.

  == Fix ==
  44de022c4382 ("ext4: fix false negatives *and* false positives in ext4_check_descriptors()")

  == Regression Potential ==
  Low.  This commit has been cc'd upstream stable, so it has had
  additional upstream review.

  == Test Case ==
  A test kernel was built with this patch and tested by the original bug reporter.
  The bug reporter states the test kernel resolved the bug.




  
  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/)
  ---
  AlsaDevices: Error: command ['ls', '-l', '/dev/snd/'] failed with exit code 2: ls: cannot access '/dev/snd/': No such file or directory
  AplayDevices: Error: [Errno 2] No such file or directory
  ApportVersion: 2.20.1-0ubuntu2.18
  Architecture: amd64
  ArecordDevices: Error: [Errno 2] No such file or directory
  CRDA: N/A
  DistroRelease: Ubuntu 16.04
  HibernationDevice: RESUME=/dev/mapper/vg_system-lv_system_swap
  InstallationDate: Installed on 2017-04-28 (488 days ago)
  InstallationMedia: Ubuntu-Server 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
  IwConfig: Error: [Errno 2] No such file or directory
  Lsusb: Error: [Errno 2] No such file or directory
  MachineType: VMware, Inc. VMware Virtual Platform
  Package: linux (not installed)
  PciMultimedia:

  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=fr_FR.UTF-8
   SHELL=/bin/bash
  ProcFB:

  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-134-generic root=/dev/mapper/vg_system-lv_system_root ro ipv6.disable=1
  ProcVersionSignature: Ubuntu 4.4.0-134.160-generic 4.4.140
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-134-generic N/A
   linux-backports-modules-4.4.0-134-generic  N/A
   linux-firmware                             N/A
  RfKill: Error: [Errno 2] No such file or directory
  Tags:  xenial xenial
  Uname: Linux 4.4.0-134-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:

  _MarkForUpload: True
  dmi.bios.date: 07/31/2013
  dmi.bios.vendor: Phoenix Technologies LTD
  dmi.bios.version: 6.00
  dmi.board.name: 440BX Desktop Reference Platform
  dmi.board.vendor: Intel Corporation
  dmi.board.version: None
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 1
  dmi.chassis.vendor: No Enclosure
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvr6.00:bd07/31/2013:svnVMware,Inc.:pnVMwareVirtualPlatform:pvrNone:rvnIntelCorporation:rn440BXDesktopReferencePlatform:rvrNone:cvnNoEnclosure:ct1:cvrN/A:
  dmi.product.name: VMware Virtual Platform
  dmi.product.version: None
  dmi.sys.vendor: VMware, Inc.
  ---
  AlsaDevices: Error: command ['ls', '-l', '/dev/snd/'] failed with exit code 2: ls: cannot access '/dev/snd/': No such file or directory
  AplayDevices: Error: [Errno 2] No such file or directory
  ApportVersion: 2.20.1-0ubuntu2.18
  Architecture: amd64
  ArecordDevices: Error: [Errno 2] No such file or directory
  CRDA: N/A
  DistroRelease: Ubuntu 16.04
  HibernationDevice: RESUME=/dev/mapper/vg_system-lv_system_swap
  InstallationDate: Installed on 2017-04-28 (488 days ago)
  InstallationMedia: Ubuntu-Server 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
  IwConfig: Error: [Errno 2] No such file or directory
  Lsusb: Error: [Errno 2] No such file or directory
  MachineType: VMware, Inc. VMware Virtual Platform
  Package: linux (not installed)
  PciMultimedia:

  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=fr_FR.UTF-8
   SHELL=/bin/bash
  ProcFB:

  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-134-generic root=/dev/mapper/vg_system-lv_system_root ro ipv6.disable=1
  ProcVersionSignature: Ubuntu 4.4.0-134.160-generic 4.4.140
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-134-generic N/A
   linux-backports-modules-4.4.0-134-generic  N/A
   linux-firmware                             N/A
  RfKill: Error: [Errno 2] No such file or directory
  Tags:  xenial xenial xenial
  Uname: Linux 4.4.0-134-generic x86_64
  UnreportableReason: The report belongs to a package that is not installed.
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:

  WifiSyslog:
   août 29 21:01:28 Template1604LTS kernel: [UFW BLOCK] IN=admin OUT= MAC=01:00:5e:00:00:01:a0:1b:29:89:4f:1a:08:00 SRC=192.168.1.1 DST=224.0.0.1 LEN=32 TOS=0x00 PREC=0x80 TTL=1 ID=0 DF PROTO=2
   août 29 21:02:08 Template1604LTS kernel: [UFW BLOCK] IN=admin OUT= MAC=01:00:5e:00:00:01:a0:1b:29:89:4f:1a:08:00 SRC=192.168.1.1 DST=224.0.0.1 LEN=32 TOS=0x00 PREC=0x80 TTL=1 ID=0 DF PROTO=2
  _MarkForUpload: False
  dmi.bios.date: 07/31/2013
  dmi.bios.vendor: Phoenix Technologies LTD
  dmi.bios.version: 6.00
  dmi.board.name: 440BX Desktop Reference Platform
  dmi.board.vendor: Intel Corporation
  dmi.board.version: None
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 1
  dmi.chassis.vendor: No Enclosure
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvr6.00:bd07/31/2013:svnVMware,Inc.:pnVMwareVirtualPlatform:pvrNone:rvnIntelCorporation:rn440BXDesktopReferencePlatform:rvrNone:cvnNoEnclosure:ct1:cvrN/A:
  dmi.product.name: VMware Virtual Platform
  dmi.product.version: None
  dmi.sys.vendor: VMware, Inc.

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