Comment 26 for bug 1376245

My system doesn't crash, but I get something similar (may be unrelated), not sure, just found this bug report via Google. This is what I get:

Nov 10 13:41:58 quadrio kernel: [ 1324.267970] WARNING: CPU: 0 PID: 14440 at /build/buildd/linux-3.13.0/fs/proc/generic.c:511 remove_proc_entry+0x139/0x1b0()
Nov 10 13:41:58 quadrio kernel: [ 1324.267972] name 'fs/nfsfs'
Nov 10 13:41:58 quadrio kernel: [ 1324.267974] Modules linked in: vmnet(OX) parport_pc vmw_vsock_vmci_transport vsock vmw_vmci vmmon(OX) nfsv3 xt_addrtype xt_conntrack ipt_MASQUERADE iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack bridge stp llc ctr ccm aufs iptable_filter ip_tables x_tables pci_stub vboxpci(OX) vboxnetadp(OX) vboxnetflt(OX) vboxdrv(OX) autofs4 uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core videodev btusb dm_crypt rfcomm bnep bluetooth mxm_wmi nfsd auth_rpcgss nfs_acl nfs lockd dm_multipath sunrpc scsi_dh fscache coretemp kvm_intel kvm nvidia(POX) joydev serio_raw pcmcia arc4 snd_hda_codec_conexant snd_hda_intel snd_hda_codec snd_hwdep snd_pcm iwldvm thinkpad_acpi nvram mac80211 snd_page_alloc snd_seq_midi snd_seq_midi_event r852 sm_common snd_rawmidi nand nand_ecc nand_bch snd_seq bch nand_ids snd_seq_device mtd snd_timer lpc_ich iwlwifi r592 snd memstick yenta_socket cfg80211 pcmcia_rsrc pcmcia_core soundcore drm wmi mei_me mei mac_hid ppdev lp parport xfs libcrc32c hid_generic usbhid hid psmouse ahci sdhci_pci libahci firewire_ohci firewire_core sdhci crc_itu_t e1000e ptp pps_core video [last unloaded: vmnet]
Nov 10 13:41:58 quadrio kernel: [ 1324.268106] CPU: 0 PID: 14440 Comm: kworker/u8:1 Tainted: P W OX 3.13.0-39-generic #66-Ubuntu
Nov 10 13:41:58 quadrio kernel: [ 1324.268109] Hardware name: LENOVO 2757CTO/2757CTO, BIOS 7ZET71WW (1.54 ) 11/27/2008
Nov 10 13:41:58 quadrio kernel: [ 1324.268111] Workqueue: netns cleanup_net
Nov 10 13:41:58 quadrio kernel: [ 1324.268113] 0000000000000009 ffff8801cb863c80 ffffffff8171ece7 ffff8801cb863cc8
Nov 10 13:41:58 quadrio kernel: [ 1324.268117] ffff8801cb863cb8 ffffffff8106773d 0000000000000000 0000000000000005
Nov 10 13:41:58 quadrio kernel: [ 1324.268120] ffffffffa10e08a8 ffff880253018ab0 0000000000000100 ffff8801cb863d18
Nov 10 13:41:58 quadrio kernel: [ 1324.268123] Call Trace:
Nov 10 13:41:58 quadrio kernel: [ 1324.268127] [<ffffffff8171ece7>] dump_stack+0x45/0x56
Nov 10 13:41:58 quadrio kernel: [ 1324.268130] [<ffffffff8106773d>] warn_slowpath_common+0x7d/0xa0
Nov 10 13:41:58 quadrio kernel: [ 1324.268134] [<ffffffff810677ac>] warn_slowpath_fmt+0x4c/0x50
Nov 10 13:41:58 quadrio kernel: [ 1324.268139] [<ffffffff81229889>] remove_proc_entry+0x139/0x1b0
Nov 10 13:41:58 quadrio kernel: [ 1324.268153] [<ffffffffa10c04e2>] nfs_fs_proc_net_exit+0x62/0x70 [nfs]
Nov 10 13:41:58 quadrio kernel: [ 1324.268167] [<ffffffffa10c65b2>] nfs_net_exit+0x12/0x20 [nfs]
Nov 10 13:41:58 quadrio kernel: [ 1324.268171] [<ffffffff8161b3a9>] ops_exit_list.isra.1+0x39/0x60
Nov 10 13:41:58 quadrio kernel: [ 1324.268175] [<ffffffff8161bc30>] cleanup_net+0x110/0x250
Nov 10 13:41:58 quadrio kernel: [ 1324.268179] [<ffffffff810839c2>] process_one_work+0x182/0x450
Nov 10 13:41:58 quadrio kernel: [ 1324.268182] [<ffffffff810847b1>] worker_thread+0x121/0x410
Nov 10 13:41:58 quadrio kernel: [ 1324.268186] [<ffffffff81084690>] ? rescuer_thread+0x430/0x430
Nov 10 13:41:58 quadrio kernel: [ 1324.268189] [<ffffffff8108b492>] kthread+0xd2/0xf0
Nov 10 13:41:58 quadrio kernel: [ 1324.268192] [<ffffffff8108b3c0>] ? kthread_create_on_node+0x1c0/0x1c0
Nov 10 13:41:58 quadrio kernel: [ 1324.268196] [<ffffffff8172f73c>] ret_from_fork+0x7c/0xb0
Nov 10 13:41:58 quadrio kernel: [ 1324.268199] [<ffffffff8108b3c0>] ? kthread_create_on_node+0x1c0/0x1c0
Nov 10 13:41:58 quadrio kernel: [ 1324.268201] ---[ end trace ac8cf7139a087ee7 ]---