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[Alberto Salvia Novella <es20490446e@xxxxxxxxx>]

** Changed in: linux (Ubuntu)
   Importance: Undecided => High

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https://bugs.launchpad.net/bugs/1553481

Title:
  kernel bug "/build/linux-j50399/linux-4.4.0/fs/btrfs/delayed-
  inode.c:659 btrfs_delayed_update_inode+0x445/0x470 [btrfs]()"

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Was logged an probably occured 15 times:

      [15771.204393] ------------[ cut here ]------------
      [15771.204430] WARNING: CPU: 1 PID: 14618 at /build/linux-j50399/linux-4.4.0/fs/btrfs/delayed-inode.c:659 btrfs_delayed_update_inode+0x445/0x470 [btrfs]()
      [15771.204432] Modules linked in: openafs(POE) bridge stp llc ebtable_filter ebtables xt_owner xfrm_user xfrm4_tunnel tunnel4 ipcomp xfrm_ipcomp esp4 ah4 af_key xfrm_algo ip6table_filter ip6_tables xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 xt_nat binfmt_misc iptable_nat nf_nat_ipv4 nf_nat ipt_REJECT nf_reject_ipv4 nf_conntrack_ipv4 nf_defrag_ipv4 xt_tcpudp xt_conntrack nf_conntrack iptable_filter ip_tables x_tables nls_iso8859_1 crct10dif_pclmul crc32_pclmul aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd serio_raw dm_multipath kvm_intel kvm irqbypass iscsi_tcp libiscsi_tcp libiscsi nfsd scsi_transport_iscsi auth_rpcgss parport_pc nfs_acl lockd grace ppdev lp sunrpc parport autofs4 btrfs raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx
      [15771.204481]  xor raid6_pq libcrc32c raid0 multipath linear dm_mirror dm_region_hash dm_log raid1 bcache e1000e psmouse ptp ahci pps_core libahci [last unloaded: openafs]
      [15771.204496] CPU: 1 PID: 14618 Comm: kworker/u12:13 Tainted: P           OE   4.4.0-9-generic #24-Ubuntu
      [15771.204498] Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./X99 Extreme3, BIOS P1.20 08/21/2014
      [15771.204519] Workqueue: btrfs-endio-write btrfs_endio_write_helper [btrfs]
      [15771.204521]  0000000000000286 00000000c7d4674a ffff880299bcbc08 ffffffff813e1963
      [15771.204525]  0000000000000000 ffffffffc0237320 ffff880299bcbc40 ffffffff8107fe12
      [15771.204528]  ffff880398741b50 ffff88046c8441c0 ffff880297261920 ffff88046c88d000
      [15771.204531] Call Trace:
      [15771.204537]  [<ffffffff813e1963>] dump_stack+0x63/0x90
      [15771.204541]  [<ffffffff8107fe12>] warn_slowpath_common+0x82/0xc0
      [15771.204544]  [<ffffffff8107ff5a>] warn_slowpath_null+0x1a/0x20
      [15771.204563]  [<ffffffffc0208105>] btrfs_delayed_update_inode+0x445/0x470 [btrfs]
      [15771.204583]  [<ffffffffc01b5b91>] btrfs_update_inode+0x91/0x100 [btrfs]
      [15771.204600]  [<ffffffffc01b8d2c>] btrfs_update_inode_fallback+0x1c/0x40 [btrfs]
      [15771.204615]  [<ffffffffc01b90aa>] btrfs_finish_ordered_io+0x35a/0x650 [btrfs]
      [15771.204630]  [<ffffffffc01b9665>] finish_ordered_fn+0x15/0x20 [btrfs]
      [15771.204650]  [<ffffffffc01e1d6a>] btrfs_scrubparity_helper+0xca/0x2f0 [btrfs]
      [15771.204653]  [<ffffffff810aa877>] ? try_to_wake_up+0x47/0x3b0
      [15771.204671]  [<ffffffffc01e201e>] btrfs_endio_write_helper+0xe/0x10 [btrfs]
      [15771.204674]  [<ffffffff81098e92>] process_one_work+0x162/0x480
      [15771.204677]  [<ffffffff810991fb>] worker_thread+0x4b/0x4c0
      [15771.204680]  [<ffffffff810991b0>] ? process_one_work+0x480/0x480
      [15771.204683]  [<ffffffff810991b0>] ? process_one_work+0x480/0x480
      [15771.204685]  [<ffffffff8109f3b8>] kthread+0xd8/0xf0
      [15771.204688]  [<ffffffff8109f2e0>] ? kthread_create_on_node+0x1e0/0x1e0
      [15771.204693]  [<ffffffff8181bc4f>] ret_from_fork+0x3f/0x70
      [15771.204695]  [<ffffffff8109f2e0>] ? kthread_create_on_node+0x1e0/0x1e0
      [15771.204697] ---[ end trace 0efb08fc46058485 ]---

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-9-generic 4.4.0-9.24
  ProcVersionSignature: Ubuntu 4.4.0-9.24-generic 4.4.3
  Uname: Linux 4.4.0-9-generic x86_64
  NonfreeKernelModules: openafs
  ApportVersion: 2.20-0ubuntu3
  Architecture: amd64
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
  Date: Sat Mar  5 12:23:14 2016
  HibernationDevice: RESUME=/dev/mapper/root-swap
  InstallationDate: Installed on 2015-04-20 (319 days ago)
  InstallationMedia: Ubuntu-Server 14.10 "Utopic Unicorn" - Release amd64 (20141022.2)
  MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
  ProcEnviron:
   TERM=screen.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-4.4.0-9-generic root=/dev/mapper/root-root ro rootflags=subvol=@
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Es läuft kein PulseAudio-Dienst oder nicht als Sessiondienst.
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-9-generic N/A
   linux-backports-modules-4.4.0-9-generic  N/A
   linux-firmware                           1.156
  RfKill:
   
  SourcePackage: linux
  UpgradeStatus: Upgraded to xenial on 2016-03-03 (1 days ago)
  dmi.bios.date: 08/21/2014
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: P1.20
  dmi.board.name: X99 Extreme3
  dmi.board.vendor: ASRock
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: To Be Filled By O.E.M.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP1.20:bd08/21/2014:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnX99Extreme3:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.name: To Be Filled By O.E.M.
  dmi.product.version: To Be Filled By O.E.M.
  dmi.sys.vendor: To Be Filled By O.E.M.

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