[897374.941786] BUG: unable to handle kernel NULL pointer dereference at 00000000000000f0
[897374.941792] IP: [<ffffffffa025d48d>] _nv012819rm+0xc2/0x65a [nvidia]
[897374.941947] PGD 1299e3067 PUD 1398f7067 PMD 0 
[897374.941951] Oops: 0000 [#1] SMP 
[897374.941953] last sysfs file: /sys/devices/pci0000:00/0000:00:1c.1/0000:03:00.0/rfkill/rfkill1/state
[897374.941957] Dumping ftrace buffer:
[897374.941959]    (ftrace buffer empty)
[897374.941960] CPU 0 
[897374.941962] Modules linked in: tun usbhid aes_x86_64 aes_generic ppdev bnep ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack ipt_REJECT xt_tcpudp iptable_filter ip_tables x_tables bridge stp kvm_intel kvm input_polldev nfsd auth_rpcgss exportfs nfs lockd nfs_acl sunrpc sbp2 lp parport btusb joydev arc4 ecb snd_hda_intel snd_pcm_oss snd_mixer_oss iwlagn iwlcore snd_pcm pcmcia snd_timer mac80211 thinkpad_acpi yenta_socket snd sdhci_pci soundcore video led_class psmouse ricoh_mmc rsrc_nonstatic pcmcia_core sdhci intel_agp snd_page_alloc cfg80211 output iTCO_wdt iTCO_vendor_support nvram pcspkr serio_raw nvidia(P) ohci1394 ieee1394 e1000e raid10 raid456 async_xor async_memcpy async_tx xor raid1 raid0 multipath linear fbcon tileblit font bitblit softcursor
[897374.942012] Pid: 4039, comm: Xorg Tainted: P           2.6.28-15-generic #52-Ubuntu
[897374.942014] RIP: 0010:[<ffffffffa025d48d>]  [<ffffffffa025d48d>] _nv012819rm+0xc2/0x65a [nvidia]
[897374.942129] RSP: 0018:ffff880129c9dd18  EFLAGS: 00010246
[897374.942131] RAX: 0000000000000000 RBX: 0000000041020000 RCX: 0000000000000001
[897374.942133] RDX: 0000000000000000 RSI: 0000000041020000 RDI: 0000000000000000
[897374.942135] RBP: ffff88012a17ee08 R08: 0000000000000000 R09: 0000000000000000
[897374.942136] R10: 00007fe7c7f5eca8 R11: 0000000000003206 R12: ffff88012a14c000
[897374.942138] R13: 0000000000400000 R14: 0000000000000002 R15: ffff88012c5c2980
[897374.942140] FS:  00007fe7cd26c700(0000) GS:ffffffff80a9b000(0000) knlGS:0000000000000000
[897374.942142] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[897374.942144] CR2: 00000000000000f0 CR3: 0000000129404000 CR4: 00000000000026a0
[897374.942146] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[897374.942148] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[897374.942150] Process Xorg (pid: 4039, threadinfo ffff880129c9c000, task ffff88013a874320)
[897374.942151] Stack:
[897374.942153]  0000000000000000 ffff88012a14c000 0000000000400000 ffff88012a01b800
[897374.942156]  0000000000000000 ffffffffa025976d 00000000c1d00002 ffff88012c2b7800
[897374.942160]  0000000080010000 0000000080010200 00000000cafe0eff ffffffffa03cbdbd
[897374.942163] Call Trace:
[897374.942166]  [<ffffffffa025976d>] ? _nv012821rm+0x103/0x1f6 [nvidia]
[897374.942282]  [<ffffffffa03cbdbd>] ? _nv003099rm+0x379/0x3b8 [nvidia]
[897374.942408]  [<ffffffffa03f0acc>] ? _nv005996rm+0xb9/0xec [nvidia]
[897374.942530]  [<ffffffffa03f0a97>] ? _nv005996rm+0x84/0xec [nvidia]
[897374.942652]  [<ffffffffa0270395>] ? _nv003189rm+0x475/0x6fd [nvidia]
[897374.942770]  [<ffffffffa046f45d>] ? rm_ioctl+0x2f/0x67 [nvidia]
[897374.942892]  [<ffffffffa052cdb3>] ? nv_kern_ioctl+0x1b3/0x480 [nvidia]
[897374.942989]  [<ffffffff802106c5>] ? __switch_to+0x2a5/0x490
[897374.942996]  [<ffffffffa052d0bc>] ? nv_kern_unlocked_ioctl+0x1c/0x20 [nvidia]
[897374.943093]  [<ffffffff802f65e1>] ? vfs_ioctl+0x31/0xa0
[897374.943097]  [<ffffffff8069996c>] ? thread_return+0x37/0x36b
[897374.943101]  [<ffffffff802f6995>] ? do_vfs_ioctl+0x75/0x230
[897374.943104]  [<ffffffff802f6be9>] ? sys_ioctl+0x99/0xa0
[897374.943107]  [<ffffffff8021253a>] ? system_call_fastpath+0x16/0x1b
[897374.943110] Code: 83 7d 64 00 74 0a 49 8b 4f 10 48 89 4d 40 eb 08 4d 8b 47 08 4c 89 45 40 49 8b 07 48 89 45 38 ba 00 00 00 00 48 89 de 48 8b 7d 40 <ff> 97 f0 00 00 00 48 89 45 30 b8 0d 00 00 00 48 83 7d 30 00 0f 
[897374.943139] RIP  [<ffffffffa025d48d>] _nv012819rm+0xc2/0x65a [nvidia]
[897374.943254]  RSP <ffff880129c9dd18>
[897374.943256] CR2: 00000000000000f0
[897374.943268] ---[ end trace 22b1d70169da3580 ]---