BUG: unable to handle kernel NULL pointer dereference at (null)
IP: [<ffffffffa016326a>] via_build_pcms+0x11a/0x230 [snd_hda_codec_via]
PGD 0 
Oops: 0000 [#1] SMP 
last sysfs file: /sys/module/snd_hda_codec/initstate
CPU 0 
Modules linked in: snd_hda_codec_via ppdev snd_hda_intel(+) snd_hda_codec snd_hwdep snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event psmouse snd_seq iptable_filter i2c_viapro serio_raw snd_timer snd_seq_device shpchp lp parport ip_tables snd soundcore x_tables snd_page_alloc sata_via via_rhine mii via_agp
Pid: 809, comm: work_for_cpu Not tainted 2.6.31-14-generic #48-Ubuntu P4M900T-M2
RIP: 0010:[<ffffffffa016326a>]  [<ffffffffa016326a>] via_build_pcms+0x11a/0x230 [snd_hda_codec_via]
RSP: 0018:ffff88006a8cbdf0  EFLAGS: 00010246
RAX: ffff88006a374800 RBX: ffff88006c002c00 RCX: ffff88006a374910
RDX: 0000000000000000 RSI: ffffffffa0163770 RDI: ffff88006c002c00
RBP: ffff88006a8cbdf0 R08: 00000000fffffffe R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffff88006b471658
R13: ffff88006c002c00 R14: ffff88006c15dcb8 R15: 000000000008c000
FS:  0000000000000000(0000) GS:ffff8800019f4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
CR2: 0000000000000000 CR3: 0000000001001000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process work_for_cpu (pid: 809, threadinfo ffff88006a8ca000, task ffff88006a0596b0)
Stack:
 ffff88006a8cbe50 ffffffffa013b7eb ffffffffa0153280 ffffffffa0153110
<0> 0000000000000000 ffffffffa0153360 ffffffffa01520b0 ffff88006c002c00
<0> ffff88006b471658 0000000000000000 ffff88006c15dcb8 000000000008c000
Call Trace:
 [<ffffffffa013b7eb>] snd_hda_codec_build_pcms+0x2b/0x280 [snd_hda_codec]
 [<ffffffffa0153280>] ? azx_send_cmd+0x0/0xd0 [snd_hda_intel]
 [<ffffffffa0153110>] ? azx_get_response+0x0/0x30 [snd_hda_intel]
 [<ffffffffa0153360>] ? azx_attach_pcm_stream+0x0/0x1a4 [snd_hda_intel]
 [<ffffffffa01520b0>] ? azx_bus_reset+0x0/0x90 [snd_hda_intel]
 [<ffffffffa01431c5>] snd_hda_build_pcms+0x1d/0x40 [snd_hda_codec]
 [<ffffffffa0153ec9>] azx_probe+0xf3/0x1ce [snd_hda_intel]
 [<ffffffff81073f60>] ? do_work_for_cpu+0x0/0x30
 [<ffffffff8128ddf2>] local_pci_probe+0x12/0x20
 [<ffffffff81073f73>] do_work_for_cpu+0x13/0x30
 [<ffffffff81078746>] kthread+0xa6/0xb0
 [<ffffffff810130ea>] child_rip+0xa/0x20
 [<ffffffff810786a0>] ? kthread+0x0/0xb0
 [<ffffffff810130e0>] ? child_rip+0x0/0x20
Code: 01 00 00 48 8b 72 30 48 89 b0 90 01 00 00 48 8b 72 38 48 89 b0 98 01 00 00 48 8b 52 40 48 89 90 a0 01 00 00 48 8b 90 e0 00 00 00 <0f> b7 12 66 89 90 6c 01 00 00 8b 90 a8 00 00 00 89 90 20 01 00 
RIP  [<ffffffffa016326a>] via_build_pcms+0x11a/0x230 [snd_hda_codec_via]
 RSP <ffff88006a8cbdf0>
CR2: 0000000000000000
---[ end trace db5c7584f6dc2d52 ]---