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

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https://bugs.launchpad.net/bugs/1793901

Title:
  kernel oops in bcache module

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  This was on an 18.04.1 install running the 4.15-34 generic kernel image, 
running from a normal ext4 root device.
  I had just a short while before created a new bcache device that was mounted 
but to which no data had been written yet. Then without any apparent particular 
reason, an apport error popped up to inform of a bcache kernel oops. Crash log 
was uploaded but no idea how to link it, so I attach it as well.
  Mostly I would like to know how concerned I should be as after a previous, 
successful test I wanted to move the whole install to bcache. Ideally, if this 
is a bug or similar, it would be nice if it could get fixed.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: linux-image-4.15.0-34-generic 4.15.0-34.37
  ProcVersionSignature: Ubuntu 4.15.0-34.37-generic 4.15.18
  Uname: Linux 4.15.0-34-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair nvidia_modeset 
nvidia
  ApportVersion: 2.20.9-0ubuntu7.3
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Sat Sep 22 18:20:22 2018
  HibernationDevice: RESUME=UUID=6bcbe7fa-85b7-4baf-9b69-0558a668bcdd
  InstallationDate: Installed on 2014-07-29 (1515 days ago)
  InstallationMedia: It
  IwConfig:
   zthnhe3w6d  no wireless extensions.
   
   eth1      no wireless extensions.
   
   lo        no wireless extensions.
  MachineType: System manufacturer System Product Name
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 EFI VGA
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-34-generic 
root=UUID=ebbab625-f14e-44ba-84d5-025ed92a5b2a ro quiet splash
  RelatedPackageVersions:
   linux-restricted-modules-4.15.0-34-generic N/A
   linux-backports-modules-4.15.0-34-generic  N/A
   linux-firmware                             1.173.1
  RfKill:
   0: hci0: Bluetooth
        Soft blocked: yes
        Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: Upgraded to bionic on 2018-09-07 (15 days ago)
  dmi.bios.date: 10/22/2015
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 0604
  dmi.board.asset.tag: Default string
  dmi.board.name: H170I-PLUS D3
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: Rev X.0x
  dmi.chassis.asset.tag: Default string
  dmi.chassis.type: 3
  dmi.chassis.vendor: Default string
  dmi.chassis.version: Default string
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr0604:bd10/22/2015:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnH170I-PLUSD3:rvrRevX.0x:cvnDefaultstring:ct3:cvrDefaultstring:
  dmi.product.family: Default string
  dmi.product.name: System Product Name
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer

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