libreport version: 2.0.10
backtrace:
:BUG: unable to handle kernel NULL pointer dereference at 0000000000000028
:IP: [<ffffffffa0672eb0>] lockd_down+0x90/0x140 [lockd]
:PGD 55cf067 PUD 90ad5067 PMD 0 
:Oops: 0000 [#1] SMP 
:CPU 1 
:Modules linked in: nfs nfs_acl auth_rpcgss fscache ppdev parport_pc parport fuse lockd sunrpc ebtable_nat ebtables ipt_MASQUERADE iptable_nat nf_nat xt_CHECKSUM iptable_mangle bnep bluetooth bridge stp llc be2iscsi iscsi_boot_sysfs bnx2i cnic uio cxgb4i cxgb4 cxgb3i cxgb3 mdio libcxgbi ib_iser rdma_cm ib_addr iw_cm ib_cm ib_sa nf_conntrack_ipv4 ip6t_REJECT ib_mad nf_conntrack_ipv6 ib_core nf_defrag_ipv4 nf_defrag_ipv6 xt_state ip6table_filter nf_conntrack iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi ip6_tables sha256_generic snd_hda_codec_analog snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_page_alloc thinkpad_acpi snd_timer snd arc4 iwl3945 iwlegacy mac80211 cfg80211 soundcore r592 memstick coretemp iTCO_wdt iTCO_vendor_support e1000e i2c_i801 rfkill microcode vhost_net tun macvtap macvlan kvm_intel kvm uinput xts gf128mul dm_crypt firewire_ohci sdhci_pci firewire_core sdhci mmc_core yenta_socket crc_itu_t ata_generic pata_acpi wmi i915 video i2c_algo_b
:it drm_kms_helper drm i2c_core [last unloaded: scsi_wait_scan]
:Pid: 11290, comm: gdbus Not tainted 3.4.0-1.fc17.x86_64 #1 LENOVO 6464Y1R/6464Y1R
:RIP: 0010:[<ffffffffa0672eb0>]  [<ffffffffa0672eb0>] lockd_down+0x90/0x140 [lockd]
:RSP: 0018:ffff880112a21b08  EFLAGS: 00010206
:RAX: 0000000000000000 RBX: ffff880119ab4000 RCX: 000000010010000a
:RDX: 0000000000000000 RSI: ffffea00044a5e80 RDI: ffffffffa067d400
:RBP: ffff880112a21b18 R08: ffff88011297b800 R09: 000000010010000a
:R10: 000000001297be01 R11: ffffffffa0671680 R12: ffff8800052f4800
:R13: ffff880130cf7780 R14: ffff88011d75e3c0 R15: ffff880112954500
:FS:  00007fdf97fff700(0000) GS:ffff88013bd00000(0000) knlGS:0000000000000000
:CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
:CR2: 0000000000000028 CR3: 00000000055cc000 CR4: 00000000000007e0
:DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
:DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
:Process gdbus (pid: 11290, threadinfo ffff880112a20000, task ffff880112954500)
:Stack:
: ffff880119ab4000 ffff8800052f4800 ffff880112a21b28 ffffffffa066f013
: ffff880112a21b38 ffffffffa06c4474 ffff880112a21b68 ffffffffa06c600e
: ffff880112a21b68 ffff8800052f7400 ffff880119ab4000 ffff8801183a9520
:Call Trace:
: [<ffffffffa066f013>] nlmclnt_done+0x13/0x20 [lockd]
: [<ffffffffa06c4474>] nfs_destroy_server+0x24/0x30 [nfs]
: [<ffffffffa06c600e>] nfs_free_server+0xce/0x190 [nfs]
: [<ffffffffa06cfcc4>] nfs_kill_super+0x34/0x40 [nfs]
: [<ffffffff8117f697>] deactivate_locked_super+0x57/0x90
: [<ffffffff8117f90e>] deactivate_super+0x4e/0x70
: [<ffffffff8119a5fc>] mntput_no_expire+0xcc/0x120
: [<ffffffff8119a676>] mntput+0x26/0x40
: [<ffffffff8119b017>] release_mounts+0x77/0x90
: [<ffffffff8119ca88>] put_mnt_ns+0x78/0x90
: [<ffffffff8107d2bf>] free_nsproxy+0x1f/0xb0
: [<ffffffff8107d500>] switch_task_namespaces+0x50/0x60
: [<ffffffff8107d520>] exit_task_namespaces+0x10/0x20
: [<ffffffff8105b086>] do_exit+0x456/0x8a0
: [<ffffffff81086976>] ? ttwu_do_activate.constprop.81+0x66/0x70
: [<ffffffff8105b81f>] do_group_exit+0x3f/0xa0
: [<ffffffff8106a5a5>] get_signal_to_deliver+0x1a5/0x5c0
: [<ffffffff810132f8>] do_signal+0x68/0x610
: [<ffffffff815f7200>] ? kprobe_flush_task+0xc0/0x150
: [<ffffffff8108525c>] ? finish_task_switch+0xbc/0xe0
: [<ffffffff81013925>] do_notify_resume+0x65/0x80
: [<ffffffff810cf96c>] ? __audit_syscall_exit+0x3ec/0x450
: [<ffffffff815f8da2>] int_signal+0x12/0x17
:Code: 00 00 00 00 00 48 c7 c7 00 d4 67 a0 e8 7a b5 f7 e0 5b 41 5c 5d c3 0f 1f 44 00 00 65 48 8b 04 25 00 c7 00 00 48 8b 80 38 05 00 00 <48> 8b 58 28 8b 05 c6 be 00 00 85 c0 48 8b 8b b0 06 00 00 74 6c 
:RIP  [<ffffffffa0672eb0>] lockd_down+0x90/0x140 [lockd]
: RSP <ffff880112a21b08>