BUG: unable to handle kernel paging request at 0000000000040004
IP: [<ffffffffa0196ce9>] vhba_ctl_read+0x209/0x2d0 [vhba]
PGD 111dab067 PUD 111dac067 PMD 0 
Oops: 0000 [#1] SMP 
last sysfs file: /sys/devices/pci0000:00/0000:00:1d.7/usb2/2-0:1.0/uevent
CPU 0 
Modules linked in: snd_hrtimer binfmt_misc parport_pc ppdev dm_crypt snd_hda_codec_hdmi nvidia(P) snd_hda_codec_idt arc4 snd_hda_intel joydev coretemp snd_hda_codec snd_hwdep ath9k snd_pcm mac80211 snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq ath9k_common snd_timer ath9k_hw vhba snd_seq_device ath uvcvideo lp hp_accel snd videodev v4l2_compat_ioctl32 hp_wmi psmouse lis3lv02d soundcore snd_page_alloc serio_raw cfg80211 parport input_polldev sparse_keymap reiserfs dm_raid45 xor uvesafb video ahci libahci r8169 ramzswap xvmalloc [last unloaded: kvm]

Pid: 2340, comm: cdemud Tainted: P          I 2.6.38-7-server #39-Ubuntu Hewlett-Packard HP Pavilion dm3 Notebook PC     /3650
RIP: 0010:[<ffffffffa0196ce9>]  [<ffffffffa0196ce9>] vhba_ctl_read+0x209/0x2d0 [vhba]
RSP: 0018:ffff880111cbfe38  EFLAGS: 00010202
RAX: 0000000000040004 RBX: ffff8801317b1650 RCX: ffff880111ce5b80
RDX: ffff880113ec6908 RSI: ffff880111cbfe98 RDI: 00007f4840291ad0
RBP: ffff880111cbfef8 R08: 0000000000000000 R09: 0000000000000000
R10: 00007f4840291790 R11: 0000000000000293 R12: ffff880113ec6904
R13: 0000000000000020 R14: ffff8801317b1000 R15: ffff880113ec6918
FS:  00007f48402b2700(0000) GS:ffff8800bbc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000040004 CR3: 0000000111d14000 CR4: 00000000000406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process cdemud (pid: 2340, threadinfo ffff880111cbe000, task ffff880111ce5b80)
Stack:
 ffff880130f22d70 00020000815db1b8 ffff880111cbff48 00007f4840291ad0
 0000000000020200 0000000000000286 0000000000000000 ffff880111ce5b80
 ffffffff81087860 ffff880111cbfe80 ffff880111cbfe80 00000000006ea9e0
Call Trace:
 [<ffffffff81087860>] ? autoremove_wake_function+0x0/0x40
 [<ffffffff81278ea3>] ? security_file_permission+0x93/0xb0
 [<ffffffff81165333>] vfs_read+0xc3/0x180
 [<ffffffff81165441>] sys_read+0x51/0x90
 [<ffffffff8100bfc2>] system_call_fastpath+0x16/0x1b
Code: 5c 41 5d 41 5e 41 5f c9 c3 49 8b 46 30 48 8b bd 58 ff ff ff 48 8d 75 a0 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 ba 20 00 00 00 48 89 45 b0 41 
RIP  [<ffffffffa0196ce9>] vhba_ctl_read+0x209/0x2d0 [vhba]
 RSP <ffff880111cbfe38>
CR2: 0000000000040004
---[ end trace a7919e7f17c0a727 ]---