BUG: unable to handle kernel NULL pointer dereference at 00000070
IP: [<f7e6f2fd>] snd_emu10k1_pcm_init_voice+0x1d/0x5d0 [snd_emu10k1]
*pde = 00000000 
Oops: 0000 [#1] SMP 
last sysfs file: /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in: binfmt_misc bridge stp bnep input_polldev video output lp snd_emu10k1_synth snd_emux_synth snd_seq_virmidi snd_seq_midi_emul snd_emu10k1 snd_ac97_codec ac97_bus snd_pcm_oss snd_mixer_oss snd_pcm snd_page_alloc snd_util_mem snd_hwdep snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device snd soundcore emu10k1_gp gameport ppdev psmouse serio_raw k8temp nvidia(P) pcspkr i2c_nforce2 joydev agpgart parport_pc parport usb_storage usbhid forcedeth ohci1394 ieee1394 fbcon tileblit font bitblit softcursor

Pid: 8834, comm: rhythmbox Tainted: P           (2.6.28-11-generic #38-Ubuntu)  
EIP: 0060:[<f7e6f2fd>] EFLAGS: 00210292 CPU: 1
EIP is at snd_emu10k1_pcm_init_voice+0x1d/0x5d0 [snd_emu10k1]
EAX: 00000000 EBX: 0000b000 ECX: 00000000 EDX: f62eca50
ESI: f62ec000 EDI: f62ed674 EBP: f2bfbd8c ESP: f2bfbd4c
 DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
Process rhythmbox (pid: 8834, ti=f2bfa000 task=f419b240 task.ti=f2bfa000)
Stack:
 00000000 00000000 00000000 00000001 f62ec53c f4fe6000 0000003f 00000001
 00200296 0e0d0008 3f3e3d3c 000000ff 00000000 0000b000 0000000a 0000b000
 f2bfbdbc f7e6f982 f62eca50 0000a000 0000b000 f62ed674 f62ec000 c3b52c00
Call Trace:
 [<f7e6f982>] ? snd_emu10k1_efx_playback_prepare+0xd2/0xf0 [snd_emu10k1]
 [<f7d31dec>] ? snd_pcm_do_prepare+0xc/0x20 [snd_pcm]
 [<f7d3192b>] ? snd_pcm_action_single+0x2b/0x60 [snd_pcm]
 [<f7d32b0b>] ? snd_pcm_action_nonatomic+0x6b/0x70 [snd_pcm]
 [<f7d35104>] ? snd_pcm_hwsync+0x44/0xa0 [snd_pcm]
 [<f7d35d03>] ? snd_pcm_common_ioctl1+0x303/0xa20 [snd_pcm]
 [<c012c6fc>] ? enqueue_entity+0x13c/0x360
 [<c0132168>] ? enqueue_task_fair+0x68/0x70
 [<c0131bfe>] ? resched_task+0x1e/0x70
 [<c0133b74>] ? try_to_wake_up+0x104/0x290
 [<c0133d0b>] ? default_wake_function+0xb/0x10
 [<c0128ea0>] ? __wake_up_common+0x40/0x70
 [<c012a590>] ? __wake_up+0x40/0x50
 [<f7d36858>] ? snd_pcm_playback_ioctl1+0x38/0x3d0 [snd_pcm]
 [<f7d36c36>] ? snd_pcm_playback_ioctl+0x46/0x50 [snd_pcm]
 [<f7d36bf0>] ? snd_pcm_playback_ioctl+0x0/0x50 [snd_pcm]
 [<c01ca1b8>] ? vfs_ioctl+0x28/0x90
 [<c01ca69e>] ? do_vfs_ioctl+0x5e/0x200
 [<c01ca8a3>] ? sys_ioctl+0x63/0x70
 [<c0103f6b>] ? sysenter_do_call+0x12/0x2f
Code: 01 00 31 ff e9 e8 fe ff ff 90 8d 74 26 00 55 89 e5 57 56 89 c6 53 83 ec 34 8b 7d 14 89 55 c8 8b 55 08 89 4d c4 8b 42 10 8b 40 08 <8b> 40 70 89 45 d4 8b 4a 04 89 4d d8 8b 58 2c 8b 40 20 e8 ac ae 
EIP: [<f7e6f2fd>] snd_emu10k1_pcm_init_voice+0x1d/0x5d0 [snd_emu10k1] SS:ESP 0068:f2bfbd4c
---[ end trace 941cb343a46c976a ]---