BUG: unable to handle kernel paging request at 0000000000040004
IP: [<ffffffffa0204bfe>] vhba_ctl_read+0x1fe/0x2e0 [vhba]
PGD 14c706067 PUD 14c704067 PMD 0 
Oops: 0000 [#1] SMP 
last sysfs file: /sys/devices/pci0000:00/0000:00:06.1/usb2/2-3/2-3:1.1/uevent
CPU 1 
Modules linked in: binfmt_misc rfcomm sco bnep l2cap vesafb parport_pc ppdev snd_hda_codec_hdmi snd_hda_codec_idt nvidia(P) snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer arc4 btusb bluetooth snd_seq_device usbhid joydev snd r852 sm_common nand vhba i2c_nforce2 ath9k mac80211 ath9k_common ath9k_hw ath uvcvideo videodev cfg80211 nand_ids nand_ecc soundcore video mtd snd_page_alloc dell_laptop psmouse serio_raw hid shpchp v4l2_compat_ioctl32 dcdbas dell_wmi sparse_keymap lp parport sdhci_pci firewire_ohci firewire_core sdhci crc_itu_t forcedeth ahci libahci

Pid: 2368, comm: cdemud Tainted: P            2.6.38-8-generic #42-Ubuntu Dell Inc. Studio XPS 1340/0K183D
RIP: 0010:[<ffffffffa0204bfe>]  [<ffffffffa0204bfe>] vhba_ctl_read+0x1fe/0x2e0 [vhba]
RSP: 0018:ffff8801533d1e38  EFLAGS: 00010202
RAX: 0000000000040004 RBX: ffff88015441b650 RCX: ffff88014d912dc0
RDX: ffff880153c02108 RSI: 0000000000000286 RDI: 0000000000000286
RBP: ffff8801533d1ef8 R08: 0000000000000000 R09: 0000000000000000
R10: 00007fe18c0f1790 R11: 0000000000000293 R12: ffff880153c02104
R13: 0000000000000020 R14: ffff88015441b000 R15: ffff880153c02118
FS:  00007fe18c112700(0000) GS:ffff88008fd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000040004 CR3: 000000014f567000 CR4: 00000000000406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process cdemud (pid: 2368, threadinfo ffff8801533d0000, task ffff88014d912dc0)
Stack:
 ffff8801544c2a40 00020000815c6af8 ffff8801533d1f48 00007fe18c0f1ad0
 0000000000020200 0000000000000286 0000000000000000 ffff88014d912dc0
 ffffffff81087f30 ffff8801533d1e80 ffff8801533d1e80 00000000019d2160
Call Trace:
 [<ffffffff81087f30>] ? autoremove_wake_function+0x0/0x40
 [<ffffffff81279c13>] ? security_file_permission+0x93/0xb0
 [<ffffffff81164f73>] vfs_read+0xc3/0x180
 [<ffffffff81165081>] sys_read+0x51/0x90
 [<ffffffff8100c002>] system_call_fastpath+0x16/0x1b
Code: 00 00 48 81 c4 98 00 00 00 5b 41 5c 41 5d 41 5e 41 5f c9 c3 49 8b 46 30 89 45 a0 49 8b 06 8b 80 84 00 00 00 89 45 a4 49 8b 46 50 <48> 8b 10 48 89 55 a8 48 8b 40 08 48 89 45 b0 41 0f b7 46 4a 88 
RIP  [<ffffffffa0204bfe>] vhba_ctl_read+0x1fe/0x2e0 [vhba]
 RSP <ffff8801533d1e38>
CR2: 0000000000040004
---[ end trace 03913d1adbb33f34 ]---