[   43.494790] ip_tables: (C) 2000-2006 Netfilter Core Team
[   43.519715] Bridge firewalling registered
[   43.550821] nf_conntrack version 0.5.0 (16384 buckets, 65536 max)
[   46.373438] cgroup: systemd-logind (1082) created nested cgroup for controller "memory" which has incomplete hierarchy support. Nested cgroups may change behavior in the future.
[   46.373441] cgroup: "memory" requires setting use_hierarchy to 1 on the root.
[   46.707387] Ebtables v2.0 registered
[   46.717220] ip6_tables: (C) 2000-2006 Netfilter Core Team
[   49.141927] init: plymouth-stop pre-start process (2737) terminated with status 1
[   51.252287] IPv6: ADDRCONF(NETDEV_UP): virbr0: link is not ready
[   68.725872] audit_printk_skb: 27 callbacks suppressed
[   68.725875] type=1400 audit(1395752567.320:55): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/lib/cups/backend/cups-pdf" pid=3265 comm="apparmor_parser"
[   68.725881] type=1400 audit(1395752567.320:56): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/sbin/cupsd" pid=3265 comm="apparmor_parser"
[   68.726205] type=1400 audit(1395752567.320:57): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/sbin/cupsd" pid=3265 comm="apparmor_parser"
[   73.597425] FAT-fs (sdb2): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.
[ 3595.414493] usb 2-1.1: USB disconnect, device number 3
[ 3595.453994] ------------[ cut here ]------------
[ 3595.454008] WARNING: CPU: 2 PID: 7193 at /build/buildd/linux-3.13.0/fs/sysfs/group.c:214 sysfs_remove_group+0xc6/0xd0()
[ 3595.454011] sysfs group ffffffff81cab340 not found for kobject 'target6:0:0'
[ 3595.454013] Modules linked in: nls_iso8859_1 xt_conntrack ipt_REJECT ip6table_filter ip6_tables ebtable_nat ebtables overlayfs xt_CHECKSUM iptable_mangle ipt_MASQUERADE iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack xt_tcpudp bridge stp llc iptable_filter ip_tables x_tables ctr ccm rfcomm bnep binfmt_misc joydev uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core videodev arc4 iwldvm mac80211 dm_multipath scsi_dh snd_hda_codec_hdmi snd_hda_codec_conexant snd_hda_intel snd_hda_codec snd_hwdep intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel snd_pcm kvm snd_page_alloc thinkpad_acpi nvram btusb bluetooth psmouse snd_seq_midi snd_seq_midi_event serio_raw snd_rawmidi iwlwifi cfg80211 snd_seq snd_seq_device snd_timer lpc_ich snd soundcore mac_hid mei_me mei lp parport dm_crypt usb_storage crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd i915 ahci libahci sdhci_pci sdhci e1000e i2c_algo_bit drm_kms_helper ptp drm pps_core wmi video
[ 3595.454106] CPU: 2 PID: 7193 Comm: umount Not tainted 3.13.0-19-generic #39-Ubuntu
[ 3595.454108] Hardware name: LENOVO 42872WU/42872WU, BIOS 8DET55WW (1.25 ) 11/01/2011
[ 3595.454111]  0000000000000009 ffff8802e0587b70 ffffffff81711075 ffff8802e0587bb8
[ 3595.454116]  ffff8802e0587ba8 ffffffff810662cd 0000000000000000 ffffffff81cab340
[ 3595.454120]  ffff88030689a838 ffff88030c8aa188 ffff880035f8e000 ffff8802e0587c08
[ 3595.454124] Call Trace:
[ 3595.454133]  [<ffffffff81711075>] dump_stack+0x45/0x56
[ 3595.454138]  [<ffffffff810662cd>] warn_slowpath_common+0x7d/0xa0
[ 3595.454142]  [<ffffffff8106633c>] warn_slowpath_fmt+0x4c/0x50
[ 3595.454149]  [<ffffffff8122ff0e>] ? sysfs_get_dirent_ns+0x4e/0x70
[ 3595.454153]  [<ffffffff812311f6>] sysfs_remove_group+0xc6/0xd0
[ 3595.454159]  [<ffffffff81490b03>] dpm_sysfs_remove+0x43/0x50
[ 3595.454164]  [<ffffffff81486535>] device_del+0x45/0x1c0
[ 3595.454171]  [<ffffffff814d8337>] scsi_target_reap_usercontext+0x27/0x40
[ 3595.454177]  [<ffffffff81080ab7>] execute_in_process_context+0x67/0x70
[ 3595.454181]  [<ffffffff814d9d04>] scsi_target_reap+0xc4/0xf0
[ 3595.454187]  [<ffffffff814db8f8>] scsi_device_dev_release_usercontext+0x188/0x1c0
[ 3595.454191]  [<ffffffff81080ab7>] execute_in_process_context+0x67/0x70
[ 3595.454196]  [<ffffffff814db76c>] scsi_device_dev_release+0x1c/0x20
[ 3595.454200]  [<ffffffff81485b82>] device_release+0x32/0xa0
[ 3595.454205]  [<ffffffff8135b447>] kobject_cleanup+0x77/0x1b0
[ 3595.454209]  [<ffffffff8135b2e8>] kobject_put+0x28/0x60
[ 3595.454215]  [<ffffffff81485e77>] put_device+0x17/0x20
[ 3595.454219]  [<ffffffff814cdcbb>] scsi_device_put+0x3b/0x50
[ 3595.454224]  [<ffffffff814e2f60>] scsi_disk_put+0x30/0x50
[ 3595.454228]  [<ffffffff814e3292>] sd_release+0x42/0xd0
[ 3595.454233]  [<ffffffff811f25ec>] __blkdev_put+0x16c/0x1a0
[ 3595.454237]  [<ffffffff811f258e>] __blkdev_put+0x10e/0x1a0
[ 3595.454241]  [<ffffffff811f2f3e>] blkdev_put+0x4e/0x140
[ 3595.454246]  [<ffffffff811badd4>] kill_block_super+0x44/0x70
[ 3595.454250]  [<ffffffff811bb09d>] deactivate_locked_super+0x3d/0x60
[ 3595.454255]  [<ffffffff811bb656>] deactivate_super+0x46/0x60
[ 3595.454259]  [<ffffffff811d82c6>] mntput_no_expire+0xd6/0x170
[ 3595.454263]  [<ffffffff811d97ae>] SyS_umount+0x8e/0x100
[ 3595.454268]  [<ffffffff81721c7f>] tracesys+0xe1/0xe6
[ 3595.454271] ---[ end trace 5d2cb0f66a6a6ae8 ]---
[ 3596.125778] usb 2-1.1: new high-speed USB device number 5 using ehci-pci
[ 3596.219357] usb 2-1.1: New USB device found, idVendor=0781, idProduct=5571
[ 3596.219368] usb 2-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 3596.219374] usb 2-1.1: Product: Firebird USB Flash Drive
[ 3596.219379] usb 2-1.1: Manufacturer: SanDisk
[ 3596.219383] usb 2-1.1: SerialNumber: 4C532000020123119431
[ 3596.219902] usb-storage 2-1.1:1.0: USB Mass Storage device detected
[ 3596.220082] scsi7 : usb-storage 2-1.1:1.0
[ 3597.218785] scsi 7:0:0:0: Direct-Access     SanDisk  Cruzer Fit       1.26 PQ: 0 ANSI: 5
[ 3597.219563] sd 7:0:0:0: Attached scsi generic sg1 type 0
[ 3597.222514] sd 7:0:0:0: [sdb] 15633408 512-byte logical blocks: (8.00 GB/7.45 GiB)
[ 3597.224669] sd 7:0:0:0: [sdb] Write Protect is off
[ 3597.224683] sd 7:0:0:0: [sdb] Mode Sense: 43 00 00 00
[ 3597.226775] sd 7:0:0:0: [sdb] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[ 3597.235467]  sdb: sdb1 sdb2
[ 3597.239475] sd 7:0:0:0: [sdb] Attached SCSI removable disk
[ 3597.468745] FAT-fs (sdb2): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.
[ 3597.714481] systemd-hostnamed[7232]: Warning: nss-myhostname is not installed. Changing the local hostname might make it unresolveable. Please install nss-myhostname!