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[Bug 1376245] Re: remove_proc_entry+0x139/0x1b0() -- name 'fs/nfsfs'

To: kernel-packages@xxxxxxxxxxxxxxxxxxx
From: Frantique <undernetangel@xxxxxxxxx>
Date: Fri, 21 Nov 2014 10:29:29 -0000
Reply-to: Bug 1376245 <1376245@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
No crash, but dmesg full with:

[  105.544050] ------------[ cut here ]------------
[  105.544057] WARNING: CPU: 1 PID: 59 at /build/buildd/linux-lts-trusty-3.13.0/fs/proc/generic.c:522 remove_proc_entry+0x16d/0x180()
[  105.544059] remove_proc_entry: removing non-empty directory 'fs/nfsfs', leaking at least 'volumes'
[  105.544060] Modules linked in: des_generic rpcsec_gss_krb5 md4 snd_hrtimer pci_stub vboxpci(OX) vboxnetadp(OX) vboxnetflt(OX) vboxdrv(OX) dm_crypt rfcomm bnep bluetooth decnet nfsd nfsv4 nfs_acl auth_rpcgss nfs qmi_wwan uvcvideo usbnet videobuf2_core videodev mii qcserial usb_wwan nls_utf8 binfmt_misc videobuf2_vmalloc usbserial videobuf2_memops cdc_wdm lockd cifs sunrpc fscache arc4 iwldvm snd_hda_codec_hdmi snd_hda_codec_realtek mac80211 joydev snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device iwlwifi snd soundcore psmouse cfg80211 snd_page_alloc serio_raw fujitsu_laptop mei_me tpm_infineon mei lpc_ich rtsx_pci_ms ppdev mac_hid memstick parport_pc i2c_i801 coretemp lp parport hid_generic usbhid hid mmc_block rtsx_pci_sdmmc i915 sdhci_pci ahci sdhci libahci rtsx_pci drm_kms_helper drm e1000e ptp i2c_algo_bit video pps_core
[  105.544107] CPU: 1 PID: 59 Comm: kworker/u16:1 Tainted: G           OX 3.13.0-39-generic #66~precise1-Ubuntu
[  105.544108] Hardware name: FUJITSU LIFEBOOK E781/FJNB222, BIOS Version 1.22 04/19/2013
[  105.544111] Workqueue: netns cleanup_net
[  105.544112]  00000000 00000000 f2141e10 c1683110 c18974d4 f2141e40 c1059c54 c1897538
[  105.544116]  f2141e6c 0000003b c18974d4 0000020a c11deb6d c11deb6d f1741840 f06809e4
[  105.544119]  00000005 f2141e58 c1059d13 00000009 f2141e50 c1897538 f2141e6c f2141e9c
[  105.544122] Call Trace:
[  105.544127]  [<c1683110>] dump_stack+0x41/0x52
[  105.544131]  [<c1059c54>] warn_slowpath_common+0x84/0xa0
[  105.544133]  [<c11deb6d>] ? remove_proc_entry+0x16d/0x180
[  105.544135]  [<c11deb6d>] ? remove_proc_entry+0x16d/0x180
[  105.544136]  [<c1059d13>] warn_slowpath_fmt+0x33/0x40
[  105.544138]  [<c11deb6d>] remove_proc_entry+0x16d/0x180
[  105.544146]  [<f996b20b>] nfs_fs_proc_net_exit+0x4b/0x60 [nfs]
[  105.544151]  [<f9970980>] nfs_net_exit+0x10/0x20 [nfs]
[  105.544153]  [<c1594e7e>] ops_exit_list.isra.1+0x2e/0x50
[  105.544155]  [<c15955c5>] cleanup_net+0xd5/0x1e0
[  105.544158]  [<c1072739>] process_one_work+0x119/0x3c0
[  105.544160]  [<c10734ca>] worker_thread+0xfa/0x370
[  105.544162]  [<c10733d0>] ? manage_workers.isra.24+0x170/0x170
[  105.544164]  [<c107928b>] kthread+0x9b/0xb0
[  105.544167]  [<c1695af7>] ret_from_kernel_thread+0x1b/0x28
[  105.544169]  [<c10791f0>] ? flush_kthread_worker+0x90/0x90
[  105.544171] ---[ end trace 7c197d278182ac8c ]---
[  105.640016] ------------[ cut here ]------------
[  105.640024] WARNING: CPU: 2 PID: 59 at /build/buildd/linux-lts-trusty-3.13.0/fs/proc/generic.c:511 remove_proc_entry+0x125/0x180()
[  105.640025] name 'fs/nfsfs'
[  105.640026] Modules linked in: des_generic rpcsec_gss_krb5 md4 snd_hrtimer pci_stub vboxpci(OX) vboxnetadp(OX) vboxnetflt(OX) vboxdrv(OX) dm_crypt rfcomm bnep bluetooth decnet nfsd nfsv4 nfs_acl auth_rpcgss nfs qmi_wwan uvcvideo usbnet videobuf2_core videodev mii qcserial usb_wwan nls_utf8 binfmt_misc videobuf2_vmalloc usbserial videobuf2_memops cdc_wdm lockd cifs sunrpc fscache arc4 iwldvm snd_hda_codec_hdmi snd_hda_codec_realtek mac80211 joydev snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device iwlwifi snd soundcore psmouse cfg80211 snd_page_alloc serio_raw fujitsu_laptop mei_me tpm_infineon mei lpc_ich rtsx_pci_ms ppdev mac_hid memstick parport_pc i2c_i801 coretemp lp parport hid_generic usbhid hid mmc_block rtsx_pci_sdmmc i915 sdhci_pci ahci sdhci libahci rtsx_pci drm_kms_helper drm e1000e ptp i2c_algo_bit video pps_core
[  105.640077] CPU: 2 PID: 59 Comm: kworker/u16:1 Tainted: G        W  OX 3.13.0-39-generic #66~precise1-Ubuntu
[  105.640078] Hardware name: FUJITSU LIFEBOOK E781/FJNB222, BIOS Version 1.22 04/19/2013
[  105.640081] Workqueue: netns cleanup_net
[  105.640083]  00000000 00000000 f2141e10 c1683110 c18974d4 f2141e40 c1059c54 c1891883
[  105.640086]  f2141e6c 0000003b c18974d4 000001ff c11deb25 c11deb25 00000000 f6c21264
[  105.640090]  00000005 f2141e58 c1059d13 00000009 f2141e50 c1891883 f2141e6c f2141e9c
[  105.640093] Call Trace:
[  105.640098]  [<c1683110>] dump_stack+0x41/0x52
[  105.640102]  [<c1059c54>] warn_slowpath_common+0x84/0xa0
[  105.640105]  [<c11deb25>] ? remove_proc_entry+0x125/0x180
[  105.640107]  [<c11deb25>] ? remove_proc_entry+0x125/0x180
[  105.640110]  [<c1059d13>] warn_slowpath_fmt+0x33/0x40
[  105.640112]  [<c11deb25>] remove_proc_entry+0x125/0x180
[  105.640125]  [<f996b20b>] nfs_fs_proc_net_exit+0x4b/0x60 [nfs]
[  105.640133]  [<f9970980>] nfs_net_exit+0x10/0x20 [nfs]
[  105.640136]  [<c1594e7e>] ops_exit_list.isra.1+0x2e/0x50
[  105.640139]  [<c15955c5>] cleanup_net+0xd5/0x1e0
[  105.640142]  [<c10712d0>] ? pwq_activate_delayed_work+0x30/0x80
[  105.640146]  [<c1072739>] process_one_work+0x119/0x3c0
[  105.640149]  [<c10734ca>] worker_thread+0xfa/0x370
[  105.640152]  [<c10733d0>] ? manage_workers.isra.24+0x170/0x170
[  105.640157]  [<c107928b>] kthread+0x9b/0xb0
[  105.640161]  [<c1695af7>] ret_from_kernel_thread+0x1b/0x28
[  105.640164]  [<c10791f0>] ? flush_kthread_worker+0x90/0x90
[  105.640166] ---[ end trace 7c197d278182ac8d ]---
[  426.734594] ------------[ cut here ]------------
[  426.734605] WARNING: CPU: 1 PID: 292 at /build/buildd/linux-lts-trusty-3.13.0/fs/proc/generic.c:511 remove_proc_entry+0x125/0x180()
[  426.734606] name 'fs/nfsfs'
[  426.734607] Modules linked in: des_generic rpcsec_gss_krb5 md4 snd_hrtimer pci_stub vboxpci(OX) vboxnetadp(OX) vboxnetflt(OX) vboxdrv(OX) dm_crypt rfcomm bnep bluetooth decnet nfsd nfsv4 nfs_acl auth_rpcgss nfs qmi_wwan uvcvideo usbnet videobuf2_core videodev mii qcserial usb_wwan nls_utf8 binfmt_misc videobuf2_vmalloc usbserial videobuf2_memops cdc_wdm lockd cifs sunrpc fscache arc4 iwldvm snd_hda_codec_hdmi snd_hda_codec_realtek mac80211 joydev snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device iwlwifi snd soundcore psmouse cfg80211 snd_page_alloc serio_raw fujitsu_laptop mei_me tpm_infineon mei lpc_ich rtsx_pci_ms ppdev mac_hid memstick parport_pc i2c_i801 coretemp lp parport hid_generic usbhid hid mmc_block rtsx_pci_sdmmc i915 sdhci_pci ahci sdhci libahci rtsx_pci drm_kms_helper drm e1000e ptp i2c_algo_bit video pps_core
[  426.734658] CPU: 1 PID: 292 Comm: kworker/u16:8 Tainted: G        W  OX 3.13.0-39-generic #66~precise1-Ubuntu
[  426.734659] Hardware name: FUJITSU LIFEBOOK E781/FJNB222, BIOS Version 1.22 04/19/2013
[  426.734662] Workqueue: netns cleanup_net
[  426.734663]  00000000 00000000 f5dd9e10 c1683110 c18974d4 f5dd9e40 c1059c54 c1891883
[  426.734667]  f5dd9e6c 00000124 c18974d4 000001ff c11deb25 c11deb25 00000000 f6c21264
[  426.734670]  00000005 f5dd9e58 c1059d13 00000009 f5dd9e50 c1891883 f5dd9e6c f5dd9e9c
[  426.734674] Call Trace:
[  426.734678]  [<c1683110>] dump_stack+0x41/0x52
[  426.734682]  [<c1059c54>] warn_slowpath_common+0x84/0xa0
[  426.734683]  [<c11deb25>] ? remove_proc_entry+0x125/0x180
[  426.734685]  [<c11deb25>] ? remove_proc_entry+0x125/0x180
[  426.734687]  [<c1059d13>] warn_slowpath_fmt+0x33/0x40
[  426.734689]  [<c11deb25>] remove_proc_entry+0x125/0x180
[  426.734698]  [<f996b20b>] nfs_fs_proc_net_exit+0x4b/0x60 [nfs]
[  426.734703]  [<f9970980>] nfs_net_exit+0x10/0x20 [nfs]
[  426.734705]  [<c1594e7e>] ops_exit_list.isra.1+0x2e/0x50
[  426.734707]  [<c15955c5>] cleanup_net+0xd5/0x1e0
[  426.734710]  [<c1072739>] process_one_work+0x119/0x3c0
[  426.734713]  [<c168e7b4>] ? apic_timer_interrupt+0x34/0x3c
[  426.734717]  [<c10734ca>] worker_thread+0xfa/0x370
[  426.734720]  [<c10733d0>] ? manage_workers.isra.24+0x170/0x170
[  426.734723]  [<c107928b>] kthread+0x9b/0xb0
[  426.734726]  [<c1695af7>] ret_from_kernel_thread+0x1b/0x28
[  426.734729]  [<c10791f0>] ? flush_kthread_worker+0x90/0x90
[  426.734731] ---[ end trace 7c197d278182ac8e ]---
[  426.794212] ------------[ cut here ]------------
[  426.794253] WARNING: CPU: 1 PID: 292 at /build/buildd/linux-lts-trusty-3.13.0/fs/proc/generic.c:511 remove_proc_entry+0x125/0x180()
[  426.794255] name 'fs/nfsfs'
[  426.794257] Modules linked in: des_generic rpcsec_gss_krb5 md4 snd_hrtimer pci_stub vboxpci(OX) vboxnetadp(OX) vboxnetflt(OX) vboxdrv(OX) dm_crypt rfcomm bnep bluetooth decnet nfsd nfsv4 nfs_acl auth_rpcgss nfs qmi_wwan uvcvideo usbnet videobuf2_core videodev mii qcserial usb_wwan nls_utf8 binfmt_misc videobuf2_vmalloc usbserial videobuf2_memops cdc_wdm lockd cifs sunrpc fscache arc4 iwldvm snd_hda_codec_hdmi snd_hda_codec_realtek mac80211 joydev snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device iwlwifi snd soundcore psmouse cfg80211 snd_page_alloc serio_raw fujitsu_laptop mei_me tpm_infineon mei lpc_ich rtsx_pci_ms ppdev mac_hid memstick parport_pc i2c_i801 coretemp lp parport hid_generic usbhid hid mmc_block rtsx_pci_sdmmc i915 sdhci_pci ahci sdhci libahci rtsx_pci drm_kms_helper drm e1000e ptp i2c_algo_bit video pps_core
[  426.794408] CPU: 1 PID: 292 Comm: kworker/u16:8 Tainted: G        W  OX 3.13.0-39-generic #66~precise1-Ubuntu
[  426.794410] Hardware name: FUJITSU LIFEBOOK E781/FJNB222, BIOS Version 1.22 04/19/2013
[  426.794426] Workqueue: netns cleanup_net
[  426.794430]  00000000 00000000 f5dd9e10 c1683110 c18974d4 f5dd9e40 c1059c54 c1891883
[  426.794435]  f5dd9e6c 00000124 c18974d4 000001ff c11deb25 c11deb25 00000000 f6c21264
[  426.794440]  00000005 f5dd9e58 c1059d13 00000009 f5dd9e50 c1891883 f5dd9e6c f5dd9e9c
[  426.794446] Call Trace:
[  426.794472]  [<c1683110>] dump_stack+0x41/0x52
[  426.794489]  [<c1059c54>] warn_slowpath_common+0x84/0xa0
[  426.794492]  [<c11deb25>] ? remove_proc_entry+0x125/0x180
[  426.794496]  [<c11deb25>] ? remove_proc_entry+0x125/0x180
[  426.794498]  [<c1059d13>] warn_slowpath_fmt+0x33/0x40
[  426.794501]  [<c11deb25>] remove_proc_entry+0x125/0x180
[  426.794543]  [<f996b20b>] nfs_fs_proc_net_exit+0x4b/0x60 [nfs]
[  426.794555]  [<f9970980>] nfs_net_exit+0x10/0x20 [nfs]
[  426.794560]  [<c1594e7e>] ops_exit_list.isra.1+0x2e/0x50
[  426.794563]  [<c15955c5>] cleanup_net+0xd5/0x1e0
[  426.794572]  [<c10712d0>] ? pwq_activate_delayed_work+0x30/0x80
[  426.794575]  [<c1072739>] process_one_work+0x119/0x3c0
[  426.794581]  [<c168e7b4>] ? apic_timer_interrupt+0x34/0x3c
[  426.794585]  [<c10734ca>] worker_thread+0xfa/0x370
[  426.794589]  [<c10733d0>] ? manage_workers.isra.24+0x170/0x170
[  426.794594]  [<c107928b>] kthread+0x9b/0xb0
[  426.794601]  [<c1695af7>] ret_from_kernel_thread+0x1b/0x28
[  426.794603]  [<c10791f0>] ? flush_kthread_worker+0x90/0x90
[  426.794608] ---[ end trace 7c197d278182ac8f ]---

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https://bugs.launchpad.net/bugs/1376245

Title:
  remove_proc_entry+0x139/0x1b0() -- name 'fs/nfsfs'

Status in “linux” package in Ubuntu:
  Fix Released
Status in “linux” source package in Trusty:
  Fix Committed
Status in “linux” source package in Utopic:
  Fix Released

Bug description:
  Ubuntu 14.04 amd64

  ii  linux-image-3.13.0-37-generic
  3.13.0-37.64                                        amd64        Linux
  kernel image for version 3.13.0 on 64 bit x86 SMP

  sloeuillet@SLoeuillet-DE107:/sfr$ uname -a
  Linux SLoeuillet-DE107 3.13.0-37-generic #64-Ubuntu SMP Mon Sep 22 21:28:38 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

  Today, I encountered 2 quite identical stack traces in my dmesg,
  related to nfs :

  
  [368973.412120] WARNING: CPU: 1 PID: 15607 at /build/buildd/linux-3.13.0/fs/proc/generic.c:511 remove_proc_entry+0x139/0x1b0()
  [368973.412122] name 'fs/nfsfs'
  [368973.412123] Modules linked in: cdc_acm nfsv3 rpcsec_gss_krb5 8021q garp stp mrp llc cuse bnep rfcomm bluetooth nfsv4 nfsd auth_rpcgss nfs_acl nfs lockd sunrpc binfmt_misc fscache hp_wmi sparse_keymap snd_hda_codec_analog snd_hda_intel snd_hda_codec snd_hwdep snd_pcm radeon snd_page_alloc snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq sp5100_tco snd_seq_device serio_raw snd_timer ttm drm_kms_helper snd kvm edac_core soundcore drm edac_mce_amd k8temp i2c_algo_bit i2c_piix4 tpm_infineon shpchp wmi mac_hid parport_pc ppdev lp parport hid_generic usbhid hid tg3 psmouse ptp pps_core floppy ahci libahci
  [368973.412164] CPU: 1 PID: 15607 Comm: kworker/u8:1 Tainted: G        W     3.13.0-37-generic #64-Ubuntu
  [368973.412166] Hardware name: Hewlett-Packard HP Compaq dc5850 Small Form Factor/3029h, BIOS 786F6 v03.14 11/15/2011
  [368973.412171] Workqueue: netns cleanup_net
  [368973.412172]  0000000000000009 ffff88006a875c80 ffffffff8171ed09 ffff88006a875cc8
  [368973.412176]  ffff88006a875cb8 ffffffff8106773d 0000000000000000 0000000000000005
  [368973.412179]  ffffffffa05168a8 ffff88011b418b30 0000000000000100 ffff88006a875d18
  [368973.412182] Call Trace:
  [368973.412188]  [<ffffffff8171ed09>] dump_stack+0x45/0x56
  [368973.412192]  [<ffffffff8106773d>] warn_slowpath_common+0x7d/0xa0
  [368973.412195]  [<ffffffff810677ac>] warn_slowpath_fmt+0x4c/0x50
  [368973.412198]  [<ffffffff81229839>] remove_proc_entry+0x139/0x1b0
  [368973.412217]  [<ffffffffa04f64e2>] nfs_fs_proc_net_exit+0x62/0x70 [nfs]
  [368973.412225]  [<ffffffffa04fc5b2>] nfs_net_exit+0x12/0x20 [nfs]
  [368973.412228]  [<ffffffff8161b409>] ops_exit_list.isra.1+0x39/0x60
  [368973.412231]  [<ffffffff8161bc90>] cleanup_net+0x110/0x250
  [368973.412235]  [<ffffffff810839c2>] process_one_work+0x182/0x450
  [368973.412237]  [<ffffffff810847b1>] worker_thread+0x121/0x410
  [368973.412240]  [<ffffffff81084690>] ? rescuer_thread+0x430/0x430
  [368973.412243]  [<ffffffff8108b492>] kthread+0xd2/0xf0
  [368973.412246]  [<ffffffff8108b3c0>] ? kthread_create_on_node+0x1c0/0x1c0
  [368973.412249]  [<ffffffff8172f77c>] ret_from_fork+0x7c/0xb0
  [368973.412251]  [<ffffffff8108b3c0>] ? kthread_create_on_node+0x1c0/0x1c0
  [368973.412253] ---[ end trace bb78fe56a3dcb678 ]---

  [368973.448199] WARNING: CPU: 1 PID: 15607 at /build/buildd/linux-3.13.0/fs/proc/generic.c:511 remove_proc_entry+0x139/0x1b0()
  [368973.448201] name 'fs/nfsfs'
  [368973.448203] Modules linked in: cdc_acm nfsv3 rpcsec_gss_krb5 8021q garp stp mrp llc cuse bnep rfcomm bluetooth nfsv4 nfsd auth_rpcgss nfs_acl nfs lockd sunrpc binfmt_misc fscache hp_wmi sparse_keymap snd_hda_codec_analog snd_hda_intel snd_hda_codec snd_hwdep snd_pcm radeon snd_page_alloc snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq sp5100_tco snd_seq_device serio_raw snd_timer ttm drm_kms_helper snd kvm edac_core soundcore drm edac_mce_amd k8temp i2c_algo_bit i2c_piix4 tpm_infineon shpchp wmi mac_hid parport_pc ppdev lp parport hid_generic usbhid hid tg3 psmouse ptp pps_core floppy ahci libahci
  [368973.448250] CPU: 1 PID: 15607 Comm: kworker/u8:1 Tainted: G        W     3.13.0-37-generic #64-Ubuntu
  [368973.448252] Hardware name: Hewlett-Packard HP Compaq dc5850 Small Form Factor/3029h, BIOS 786F6 v03.14 11/15/2011
  [368973.448257] Workqueue: netns cleanup_net
  [368973.448259]  0000000000000009 ffff88006a875c80 ffffffff8171ed09 ffff88006a875cc8
  [368973.448263]  ffff88006a875cb8 ffffffff8106773d 0000000000000000 0000000000000005
  [368973.448265]  ffffffffa05168a8 ffff88011b418b30 0000000000000100 ffff88006a875d18
  [368973.448268] Call Trace:
  [368973.448275]  [<ffffffff8171ed09>] dump_stack+0x45/0x56
  [368973.448279]  [<ffffffff8106773d>] warn_slowpath_common+0x7d/0xa0
  [368973.448283]  [<ffffffff810677ac>] warn_slowpath_fmt+0x4c/0x50
  [368973.448286]  [<ffffffff81229839>] remove_proc_entry+0x139/0x1b0
  [368973.448313]  [<ffffffffa04f64e2>] nfs_fs_proc_net_exit+0x62/0x70 [nfs]
  [368973.448322]  [<ffffffffa04fc5b2>] nfs_net_exit+0x12/0x20 [nfs]
  [368973.448325]  [<ffffffff8161b409>] ops_exit_list.isra.1+0x39/0x60
  [368973.448327]  [<ffffffff8161bc90>] cleanup_net+0x110/0x250
  [368973.448331]  [<ffffffff810839c2>] process_one_work+0x182/0x450
  [368973.448334]  [<ffffffff810847b1>] worker_thread+0x121/0x410
  [368973.448337]  [<ffffffff81084690>] ? rescuer_thread+0x430/0x430
  [368973.448341]  [<ffffffff8108b492>] kthread+0xd2/0xf0
  [368973.448343]  [<ffffffff8108b3c0>] ? kthread_create_on_node+0x1c0/0x1c0
  [368973.448346]  [<ffffffff8172f77c>] ret_from_fork+0x7c/0xb0
  [368973.448349]  [<ffffffff8108b3c0>] ? kthread_create_on_node+0x1c0/0x1c0
  [368973.448351] ---[ end trace bb78fe56a3dcb679 ]---

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-37-generic 3.13.0-37.64
  ProcVersionSignature: Ubuntu 3.13.0-37.64-generic 3.13.11.7
  Uname: Linux 3.13.0-37-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.4
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  sloeuillet   2501 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Wed Oct  1 14:44:17 2014
  HibernationDevice: RESUME=UUID=f74ad7c2-cbec-4b9b-8b27-d1b624315ca8
  InstallationDate: Installed on 2013-09-16 (380 days ago)
  InstallationMedia: Ubuntu 12.04.3 LTS "Precise Pangolin" - Release amd64 (20130820.1)
  IwConfig:
   eth0      no wireless extensions.
   
   lo        no wireless extensions.
  MachineType: Hewlett-Packard HP Compaq dc5850 Small Form Factor
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-37-generic root=/dev/sda1 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-37-generic N/A
   linux-backports-modules-3.13.0-37-generic  N/A
   linux-firmware                             1.127.7
  RfKill:
   
  SourcePackage: linux
  UpgradeStatus: Upgraded to trusty on 2014-04-28 (156 days ago)
  dmi.bios.date: 11/15/2011
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: 786F6 v03.14
  dmi.board.name: 3029h
  dmi.board.vendor: Hewlett-Packard
  dmi.chassis.type: 4
  dmi.chassis.vendor: Hewlett-Packard
  dmi.modalias: dmi:bvnHewlett-Packard:bvr786F6v03.14:bd11/15/2011:svnHewlett-Packard:pnHPCompaqdc5850SmallFormFactor:pvr:rvnHewlett-Packard:rn3029h:rvr:cvnHewlett-Packard:ct4:cvr:
  dmi.product.name: HP Compaq dc5850 Small Form Factor
  dmi.sys.vendor: Hewlett-Packard

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References

[Bug 1376245] [NEW] remove_proc_entry+0x139/0x1b0() -- name 'fs/nfsfs'
From: Stéphane Loeuillet, 2014-10-01