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[Rudolf Körner <rudolf.koerner@xxxxxxxxxxxxx>]

apport information

** Attachment added: "WifiSyslog.txt"
   https://bugs.launchpad.net/bugs/1505558/+attachment/4542103/+files/WifiSyslog.txt

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Title:
  invalid opcode: 0000 [#1] SMP - kernel BUG at inode.c

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Description:	Ubuntu 14.04.3 LTS
  Release:	14.04
  linux-image-3.16.0-50-generic:
    Installed: 3.16.0-50.67~14.04.1

  At or during accessing the filesystem on an external USB drive, the kernel bug (see below) occured.
  Afterwards, an "ls" did not react, i.e. hangs until closing the terminal.
  The drive itself seems to be ok, since it passes a SMART check.
  The filesystem was created by using the standard Ubuntu 14.04 encryption mechanism (LUKS).

  [667249.607538] ------------[ cut here ]------------
  [667249.607567] kernel BUG at /build/linux-lts-utopic-PySpCy/linux-lts-utopic-3.16.0/fs/inode.c:507!
  [667249.607600] invalid opcode: 0000 [#1] SMP 
  [667249.607617] Modules linked in: btrfs(E) xor(E) raid6_pq(E) ufs(E) qnx4(E) hfsplus(E) hfs(E) minix(E) ntfs(E) msdos(E) jfs(E) xfs(E) libcrc32c(E) d
  es_generic md4 nls_utf8 cifs xts gf128mul pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) bnep rfcomm bluetooth 6lowpan_iphc binfmt_misc nfsd auth_rpcgss nfs_acl nf
  s lockd sunrpc fscache dm_crypt joydev snd_hda_codec_analog snd_hda_codec_generic gpio_ich hp_wmi sparse_keymap coretemp kvm_intel kvm serio_raw snd_hda_intel snd_hda_controller s
  nd_hda_codec snd_hwdep snd_pcm lpc_ich snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device snd_timer shpchp snd soundcore tpm_infineon mei_me mei parport_pc mac_hid
   ppdev lp parport hid_generic hid_microsoft usbhid hid psmouse uas usb_storage i915 i2c_algo_bit video wmi drm_kms_helper e1000e drm pata_acpi ptp pps_core
  [667249.607979] CPU: 1 PID: 42 Comm: kswapd0 Tainted: G           OE 3.16.0-50-generic #66~14.04.1-Ubuntu
  [667249.608004] task: ffff8801154ad180 ti: ffff8800d5c44000 task.ti: ffff8800d5c44000
  [667249.608004] RIP: 0010:[<ffffffff811ee559>]  [<ffffffff811ee559>] clear_inode+0xc9/0xf0
  [667249.608004] RSP: 0018:ffff8800d5c47b60  EFLAGS: 00010002
  [667249.608004] RAX: 0000000040e840e8 RBX: ffff8800080773f0 RCX: 0000000000000000
  [667249.608004] RDX: 00000000000040e8 RSI: ffff8800d5c479c8 RDI: ffff880008077558
  [667249.608004] RBP: ffff8800d5c47b70 R08: 0000000000011001 R09: 0000000000040000
  [667249.608004] R10: 0000000000000000 R11: 0000000000000220 R12: ffff880008077558
  [667249.608004] R13: ffffffff81835820 R14: 0000000000000070 R15: 0000000000000000
  [667249.608004] FS:  0000000000000000(0000) GS:ffff88011bc80000(0000) knlGS:0000000000000000
  [667249.608004] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
  [667249.608004] CR2: 0000000001dbeb10 CR3: 00000000bbc77000 CR4: 00000000000007e0
  [667249.608004] Stack:
  [667249.608004]  ffff8800080773f0 ffff8800080773f0 ffff8800d5c47b88 ffffffff812735fa
  [667249.608004]  ffff880008077540 ffff8800d5c47ba8 ffffffff8125a4b8 ffff8800080773f0
  [667249.608004]  ffff8800080774f8 ffff8800d5c47bd0 ffffffff811ef454 ffff8800d5c47c00
  [667249.608004] Call Trace:
  [667249.608004]  [<ffffffff812735fa>] ext4_clear_inode+0x1a/0x90
  [667249.608004]  [<ffffffff8125a4b8>] ext4_evict_inode+0x88/0x4d0
  [667249.608004]  [<ffffffff811ef454>] evict+0xb4/0x180
  [667249.608004]  [<ffffffff811ef559>] dispose_list+0x39/0x50
  [667249.608004]  [<ffffffff811f0467>] prune_icache_sb+0x47/0x60
  [667249.608004]  [<ffffffff811d7e05>] super_cache_scan+0x105/0x170
  [667249.608004]  [<ffffffff811720a8>] shrink_slab_node+0x138/0x290
  [667249.608004]  [<ffffffff81173bab>] shrink_slab+0x8b/0x160
  [667249.608004]  [<ffffffff81177612>] balance_pgdat+0x3f2/0x620
  [667249.608004]  [<ffffffff8117799b>] kswapd+0x15b/0x3f0
  [667249.608004]  [<ffffffff810b50b0>] ? prepare_to_wait_event+0x100/0x100
  [667249.608004]  [<ffffffff81177840>] ? balance_pgdat+0x620/0x620
  [667249.608004]  [<ffffffff81091572>] kthread+0xd2/0xf0
  [667249.608004]  [<ffffffff810914a0>] ? kthread_create_on_node+0x1c0/0x1c0
  [667249.608004]  [<ffffffff8176ed18>] ret_from_fork+0x58/0x90
  [667249.608004]  [<ffffffff810914a0>] ? kthread_create_on_node+0x1c0/0x1c0
  [667249.608004] Code: 74 ac 89 c2 8d 40 02 66 89 c2 89 d1 81 e1 ff ff fe ff 89 c8 c1 e8 10 66 39 c1 74 19 0f b7 f2 4c 89 e7 66 66 66 90 66 66 90 eb 83 <0f> 0b 0f 0b 0f 0b 0f 0b 0f 0b 89 d0 f0 0f b1 8b 68 01 00 00 39 
  [667249.608004] RIP  [<ffffffff811ee559>] clear_inode+0xc9/0xf0
  [667249.608004]  RSP <ffff8800d5c47b60>
  [667249.608004] ---[ end trace 8332c22fbfe53045 ]---

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.16.0-50-generic 3.16.0-50.67~14.04.1
  ProcVersionSignature: Ubuntu 3.16.0-50.66~14.04.1-generic 3.16.7-ckt16
  Uname: Linux 3.16.0-50-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.15
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Tue Oct 13 10:05:04 2015
  InstallationDate: Installed on 2015-03-05 (221 days ago)
  InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
  SourcePackage: linux-lts-utopic
  UpgradeStatus: No upgrade log present (probably fresh install)
  --- 
  ApportVersion: 2.14.1-0ubuntu3.19
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  kor        2961 F.... pulseaudio
  CurrentDesktop: Unity
  DistroRelease: Ubuntu 14.04
  HibernationDevice: RESUME=UUID=f9f0b85a-5493-4105-af0f-4a25fc947190
  InstallationDate: Installed on 2015-03-05 (299 days ago)
  InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
  IwConfig:
   eth1      no wireless extensions.
   
   eth3      no wireless extensions.
   
   lo        no wireless extensions.
  MachineType: Hewlett-Packard HP Compaq dc7800p Convertible Minitower
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.16.0-57-generic root=UUID=fca3eb27-f977-4694-b902-8df9bf8a0493 ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.16.0-57.77~14.04.1-generic 3.16.7-ckt20
  RelatedPackageVersions:
   linux-restricted-modules-3.16.0-57-generic N/A
   linux-backports-modules-3.16.0-57-generic  N/A
   linux-firmware                             1.127.19
  RfKill:
   
  Tags:  trusty
  Uname: Linux 3.16.0-57-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 03/18/2008
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: 786F1 v01.24
  dmi.board.asset.tag: CZC80732BN
  dmi.board.name: 0AACh
  dmi.board.vendor: Hewlett-Packard
  dmi.chassis.asset.tag: CZC80732BN
  dmi.chassis.type: 6
  dmi.chassis.vendor: Hewlett-Packard
  dmi.modalias: dmi:bvnHewlett-Packard:bvr786F1v01.24:bd03/18/2008:svnHewlett-Packard:pnHPCompaqdc7800pConvertibleMinitower:pvr:rvnHewlett-Packard:rn0AACh:rvr:cvnHewlett-Packard:ct6:cvr:
  dmi.product.name: HP Compaq dc7800p Convertible Minitower
  dmi.sys.vendor: Hewlett-Packard

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