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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
precise' to 'verification-done-precise'.

If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!


** Tags added: verification-needed-precise

** Tags added: verification-needed-trusty

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https://bugs.launchpad.net/bugs/1508510

Title:
  Something in the Kernel crashes when I try to mount via NFS

Status in linux package in Ubuntu:
  Invalid
Status in linux-lts-utopic package in Ubuntu:
  Invalid
Status in linux source package in Precise:
  Fix Committed
Status in linux-lts-utopic source package in Precise:
  Invalid
Status in linux source package in Trusty:
  Fix Committed
Status in linux-lts-utopic source package in Trusty:
  Fix Committed

Bug description:
  I have a vagrant virtual machine that mounts a directory on my
  computer via NFS, this does not work and the reason seems to be this.
  My System is using SMP, reverting to the kernel before solves the
  problem.

  Broken: Linux paul-ThinkPad-T430s 3.13.0-66-generic
  Working: Broken: Linux paul-ThinkPad-T430s 3.13.0-65-generic
   
  BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
  [   84.360198] IP: [<ffffffff8161d84d>] skb_copy_and_csum_datagram_iovec+0x2d/0x110
  [   84.360224] PGD 0 
  [   84.360232] Oops: 0000 [#1] SMP 
  [   84.360246] Modules linked in: ctr ccm pci_stub vboxpci(OX) vboxnetadp(OX) vboxnetflt(OX) vboxdrv(OX) vmw_vsock_vmci_transport vsock vmw_vmci rfcomm bnep arc4 iwldvm mac80211 hid_generic usbhid hid snd_hda_codec_hdmi snd_hda_codec_realtek iwlwifi cfg80211 binfmt_misc nfsd auth_rpcgss nfs_acl nfs lockd sunrpc fscache nls_iso8859_1 uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core videodev cdc_mbim cdc_ncm usbnet mii cdc_wdm cdc_acm btusb bluetooth intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd joydev serio_raw snd_hda_intel snd_hda_codec snd_hwdep thinkpad_acpi nvram snd_pcm snd_seq_midi lpc_ich snd_seq_midi_event snd_rawmidi shpchp snd_page_alloc mei_me mei i915 snd_seq drm_kms_helper drm i2c_algo_bit parport_pc wmi snd_seq_device snd_timer ppdev snd soundcore lp mac_hid parport video mmc_block psmouse e1000e ahci sdhci_pci libahci ptp sdhci pps_core
  [   84.360613] CPU: 2 PID: 1507 Comm: nfsd Tainted: G           OX 3.13.0-66-generic #108-Ubuntu
  [   84.360643] Hardware name: LENOVO 2355CTO/2355CTO, BIOS G7ET95WW (2.55 ) 07/10/2013
  [   84.360673] task: ffff880036929800 ti: ffff880036b7a000 task.ti: ffff880036b7a000
  [   84.360696] RIP: 0010:[<ffffffff8161d84d>]  [<ffffffff8161d84d>] skb_copy_and_csum_datagram_iovec+0x2d/0x110
  [   84.360728] RSP: 0018:ffff880036b7bbc0  EFLAGS: 00010216
  [   84.360743] RAX: 0000000000000000 RBX: ffff880035910700 RCX: 0000000000000000
  [   84.360762] RDX: 0000000000000000 RSI: 0000000000000030 RDI: ffff88038e23ab00
  [   84.360781] RBP: ffff880036b7bbf8 R08: 0000000000000000 R09: 0000000062e59d1a
  [   84.360800] R10: 0000000000000000 R11: 0000000000000004 R12: 0000000000000008
  [   84.360819] R13: ffff88038e23ab00 R14: 0000000000000028 R15: ffff88038e23ab00
  [   84.360838] FS:  0000000000000000(0000) GS:ffff88043e280000(0000) knlGS:0000000000000000
  [   84.360859] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  [   84.360874] CR2: 0000000000000008 CR3: 0000000425ea0000 CR4: 00000000001427e0
  [   84.360893] Stack:
  [   84.360900]  ffffffff81616f66 ffffffff81616fb0 ffff880035910700 ffff880036b7bdf8
  [   84.360924]  0000000000000000 0000000000000028 ffff88038e23ab00 ffff880036b7bc60
  [   84.360948]  ffffffff8168b2ec ffff880426f8c028 ffff880035910770 0000000200000000
  [   84.360972] Call Trace:
  [   84.360984]  [<ffffffff81616f66>] ? skb_checksum+0x26/0x30
  [   84.361005]  [<ffffffff81616fb0>] ? skb_push+0x40/0x40
  [   84.361025]  [<ffffffff8168b2ec>] udp_recvmsg+0x1dc/0x380
  [   84.361046]  [<ffffffff8169650c>] inet_recvmsg+0x6c/0x80
  [   84.361065]  [<ffffffff8160f0aa>] sock_recvmsg+0x9a/0xd0
  [   84.361087]  [<ffffffff8107576a>] ? del_timer_sync+0x4a/0x60
  [   84.361106]  [<ffffffff8172762d>] ? schedule_timeout+0x17d/0x2d0
  [   84.361126]  [<ffffffff8160f11a>] kernel_recvmsg+0x3a/0x50
  [   84.361164]  [<ffffffffa05b5d29>] svc_udp_recvfrom+0x89/0x440 [sunrpc]
  [   84.361185]  [<ffffffff8172c01b>] ? _raw_spin_unlock_bh+0x1b/0x40
  [   84.361211]  [<ffffffffa05c2cc8>] ? svc_get_next_xprt+0xd8/0x310 [sunrpc]
  [   84.361237]  [<ffffffffa05c3450>] svc_recv+0x4a0/0x5c0 [sunrpc]
  [   84.361255]  [<ffffffff810777ab>] ? recalc_sigpending+0x1b/0x50
  [   84.361276]  [<ffffffffa063e70d>] nfsd+0xad/0x130 [nfsd]
  [   84.361295]  [<ffffffffa063e660>] ? nfsd_destroy+0x80/0x80 [nfsd]
  [   84.361313]  [<ffffffff8108b7d2>] kthread+0xd2/0xf0
  [   84.361328]  [<ffffffff8108b700>] ? kthread_create_on_node+0x1c0/0x1c0
  [   84.361346]  [<ffffffff81734ba8>] ret_from_fork+0x58/0x90
  [   84.361362]  [<ffffffff8108b700>] ? kthread_create_on_node+0x1c0/0x1c0
  [   84.361383] Code: 44 00 00 55 31 c0 48 89 e5 41 57 41 56 41 55 49 89 fd 41 54 41 89 f4 53 48 83 ec 10 8b 77 68 41 89 f6 45 29 e6 0f 84 89 00 00 00 <48> 8b 42 08 48 89 d3 48 85 c0 75 14 0f 1f 80 00 00 00 00 48 83 
  [   84.361514] RIP  [<ffffffff8161d84d>] skb_copy_and_csum_datagram_iovec+0x2d/0x110
  [   84.361546]  RSP <ffff880036b7bbc0>
  [   84.361557] CR2: 0000000000000008
  [   84.366322] ---[ end trace f8aceef52c8aecd1 ]---

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-66-generic 3.13.0-66.108
  ProcVersionSignature: Ubuntu 3.13.0-66.108-generic 3.13.11-ckt27
  Uname: Linux 3.13.0-66-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.16
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  paul       2717 F.... pulseaudio
  CurrentDesktop: GNOME
  Date: Wed Oct 21 17:05:35 2015
  HibernationDevice: RESUME=UUID=d00bf67f-487f-437c-9069-db3ff456958f
  InstallationDate: Installed on 2013-10-05 (745 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
  MachineType: LENOVO 2355CTO
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-66-generic.efi.signed root=UUID=67ae3efa-eae6-4b17-92a5-88c203446404 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-66-generic N/A
   linux-backports-modules-3.13.0-66-generic  N/A
   linux-firmware                             1.127.15
  SourcePackage: linux
  UpgradeStatus: Upgraded to trusty on 2014-04-24 (544 days ago)
  dmi.bios.date: 07/10/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: G7ET95WW (2.55 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 2355CTO
  dmi.board.vendor: LENOVO
  dmi.board.version: 0B98401 Pro
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvrG7ET95WW(2.55):bd07/10/2013:svnLENOVO:pn2355CTO:pvrThinkPadT430s:rvnLENOVO:rn2355CTO:rvr0B98401Pro:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 2355CTO
  dmi.product.version: ThinkPad T430s
  dmi.sys.vendor: LENOVO

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