[   25.700537] tg3 0000:02:00.0: eth0: Flow control is on for TX and on for RX
[   25.700591] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[   35.752010] eth0: no IPv6 routers present
[   36.732171] EXT4-fs (sda1): re-mounted. Opts: errors=remount-ro,commit=0
[   41.948071] EXT4-fs (sda1): re-mounted. Opts: errors=remount-ro,commit=0
[  227.333029] BUG: unable to handle kernel NULL pointer dereference at   (null)
[  227.333101] IP: [<dfeb5ace>] vhba_ctl_read+0x16e/0x230 [vhba]
[  227.333151] *pde = 1b786067 *pte = 00000000 
[  227.333186] Oops: 0000 [#1] SMP 
[  227.333215] last sysfs file: /sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-VGA-1/status
[  227.333277] Modules linked in: binfmt_misc snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm snd_seq_midi i915 snd_rawmidi drm_kms_helper snd_seq_midi_event drm snd_seq snd_timer snd_seq_device i2c_algo_bit psmouse snd serio_raw dcdbas ppdev video soundcore snd_page_alloc parport_pc vhba lp parport usbhid hid tg3
[  227.333527] 
[  227.333541] Pid: 1542, comm: cdemud Not tainted 2.6.38-7-generic #39-Ubuntu Dell Inc.                 OptiPlex GX520               /0C8810
[  227.333642] EIP: 0060:[<dfeb5ace>] EFLAGS: 00010283 CPU: 0
[  227.333683] EIP is at vhba_ctl_read+0x16e/0x230 [vhba]
[  227.333718] EAX: 00000000 EBX: d9ca9bb0 ECX: 00000020 EDX: 00000296
[  227.333760] ESI: d9ca9800 EDI: 00000020 EBP: c6c9ff64 ESP: c6c9fef8
[  227.333803]  DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[  227.333842] Process cdemud (pid: 1542, ti=c6c9e000 task=c73c4bc0 task.ti=c6c9e000)
[  227.333892] Stack:
[  227.333906]  00000000 00000000 00000000 de87b108 b77eff80 c6c9ff98 00020200 00000296
[  227.333972]  db56e1b0 db56e1a4 00000000 c73c4bc0 c106d290 c6c9ff2c c6c9ff2c dbf03c04
[  227.334038]  00000000 c1128440 dc280200 00000000 00000000 db6e0780 00000006 a753ef60
[  227.334103] Call Trace:
[  227.334129]  [<c106d290>] ? autoremove_wake_function+0x0/0x50
[  227.334172]  [<c1128440>] ? alloc_file+0x20/0xb0
[  227.334206]  [<c112715f>] vfs_read+0x9f/0x160
[  227.334239]  [<dfeb5960>] ? vhba_ctl_read+0x0/0x230 [vhba]
[  227.334279]  [<c1127262>] sys_read+0x42/0x70
[  227.334313]  [<c1509904>] syscall_call+0x7/0xb
[  227.334343] Code: 15 14 00 00 00 89 f8 0f 85 b0 00 00 00 83 c4 60 5b 5e 5f 5d c3 8b 46 18 b9 20 00 00 00 89 45 d0 8b 06 8b 40 4c 89 45 d4 8b 46 30 <8b> 10 89 55 d8 8b 50 04 89 55 dc 8b 50 08 89 55 e0 8b 40 0c 8d 
[  227.334627] EIP: [<dfeb5ace>] vhba_ctl_read+0x16e/0x230 [vhba] SS:ESP 0068:c6c9fef8
[  227.334682] CR2: 0000000000000000
[  227.399045] ---[ end trace 5454a1e2d15e2966 ]---
[  247.840037] scsi 4:0:0:0: abort 0
[  257.840019] scsi 4:0:0:0: abort 0
[  257.840032] scsi 4:0:0:0: Device offlined - not ready after error recovery
[  278.880039] scsi 4:0:1:0: abort 0
[  288.880021] scsi 4:0:1:0: abort 0
[  288.880036] scsi 4:0:1:0: Device offlined - not ready after error recovery