# modprobe snd-hda-intel
[  298.777045] BUG: unable to handle kernel NULL pointer dereference at 0000000000000128
[  298.778025] IP: [<ffffffffa02e4201>] snd_hda_queue_unsol_event+0x1/0x50 [snd_hda_codec]
[  298.790997] PGD 6c1db067 PUD 6c15f067 PMD 0 
[  298.790997] Oops: 0000 [#1] SMP 
[  298.790997] CPU 1 
[  298.790997] Modules linked in: snd_hda_intel(+) snd_hda_codec snd_hwdep snd_pcm snd_page_alloc snd_seq snd_timer snd_seq_device snd soundcore usbhid rc_imon_pad imon ir_lirc_codec lirc_dev ir_mce_kbd_decoder ir_sony_decoder ir_jvc_dec3
[  298.826866] 
[  298.826866] Pid: 0, comm: kworker/0:0 Tainted: P            3.1.5-gentoo #8 ASUS M4A78LT-M
[  298.826866] RIP: 0010:[<ffffffffa02e4201>]  [<ffffffffa02e4201>] snd_hda_queue_unsol_event+0x1/0x50 [snd_hda_codec]
[  298.826866] RSP: 0018:ffff88006fd03e38  EFLAGS: 00010002
[  298.826866] RAX: 0000000000000002 RBX: ffff88006cbc4000 RCX: ffff88006abd6800
[  298.826866] RDX: 0000000000000012 RSI: 00000000ffffffff RDI: 0000000000000000
[  298.826866] RBP: ffff88006fd03e68 R08: 0000000000000001 R09: 0000000000000008
[  298.826866] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
[  298.826866] R13: 0000000000000000 R14: 00000000c0000000 R15: 000000000000001c
[  298.826866] FS:  00007eff504f2700(0000) GS:ffff88006fd00000(0000) knlGS:0000000000000000
[  298.826866] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  298.826866] CR2: 0000000000000128 CR3: 0000000061a8c000 CR4: 00000000000006e0
[  298.826866] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  298.826866] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[  298.826866] Process kworker/0:0 (pid: 0, threadinfo ffff88006d498000, task ffff88006d44c100)
[  298.826866] Stack:
[  298.826866]  ffff88006fd03e68 ffffffffa02f87fc 0000000000000286 ffff88006cbc7780
[  298.826866]  0000000000000008 ffff88006cbc4000 ffff88006fd03eb8 ffffffffa02f88f7
[  298.826866]  ffff88006cbc4218 ffff88006cbc4044 0000000000000000 ffff88006c344500
[  298.826866] Call Trace:
[  298.826866]  <IRQ> 
[  298.826866]  [<ffffffffa02f87fc>] ? azx_update_rirb+0xbc/0xe0 [snd_hda_intel]
[  298.826866]  [<ffffffffa02f88f7>] azx_interrupt+0xd7/0x190 [snd_hda_intel]
[  298.826866]  [<ffffffff81093d85>] handle_irq_event_percpu+0x55/0x1f0
[  298.826866]  [<ffffffff81093f57>] handle_irq_event+0x37/0x60
[  298.826866]  [<ffffffff81096514>] handle_fasteoi_irq+0x54/0xd0
[  298.826866]  [<ffffffff8100404d>] handle_irq+0x1d/0x30
[  298.826866]  [<ffffffff81003ce8>] do_IRQ+0x58/0xe0
[  298.826866]  [<ffffffff8142ea2b>] common_interrupt+0x6b/0x6b
[  298.826866]  <EOI> 
[  298.826866]  [<ffffffff8106fbd1>] ? tick_nohz_stop_sched_tick+0x281/0x3c0
[  298.826866]  [<ffffffff81000ac9>] cpu_idle+0x79/0x100
[  298.826866]  [<ffffffff8142770a>] start_secondary+0x23c/0x243
[  298.826866] Code: c4 48 8d 58 f0 74 18 0f 1f 00 48 89 df e8 a8 6c 00 00 48 8b 43 10 49 39 c4 48 8d 58 f0 75 eb 5b 31 c0 41 5c c9 c3 0f 1f 40 00 55 
[  298.826866]  8b 87 28 01 00 00 48 89 e5 48 85 c0 74 34 8b 88 04 02 00 00 
[  298.826866] RIP  [<ffffffffa02e4201>] snd_hda_queue_unsol_event+0x1/0x50 [snd_hda_codec]
[  298.826866]  RSP <ffff88006fd03e38>
[  298.826866] CR2: 0000000000000128
[  298.826866] ---[ end trace 9dd4667e4fe161ce ]---
[  298.826866] Kernel panic - not syncing: Fatal exception in interrupt
[  298.826866] Pid: 0, comm: kworker/0:0 Tainted: P      D     3.1.5-gentoo #8
[  298.826866] Call Trace:
[  298.826866]  <IRQ>  [<ffffffff8142bdd6>] panic+0x8c/0x193
[  298.826866]  [<ffffffff81005639>] oops_end+0x99/0xa0
[  298.826866]  [<ffffffff81024a30>] no_context+0xf0/0x260
[  298.826866]  [<ffffffff81024cbd>] __bad_area_nosemaphore+0x11d/0x200
[  298.826866]  [<ffffffff81024dae>] bad_area_nosemaphore+0xe/0x10
[  298.826866]  [<ffffffff810252dc>] do_page_fault+0x2ac/0x430
[  298.826866]  [<ffffffff81037429>] ? load_balance+0x99/0x780
[  298.826866]  [<ffffffff81065e7d>] ? sched_clock_local+0x1d/0x90
[  298.826866]  [<ffffffff8142ec2f>] page_fault+0x1f/0x30
[  298.826866]  [<ffffffffa02e4201>] ? snd_hda_queue_unsol_event+0x1/0x50 [snd_hda_codec]
[  298.826866]  [<ffffffffa02f87fc>] ? azx_update_rirb+0xbc/0xe0 [snd_hda_intel]
[  298.826866]  [<ffffffffa02f88f7>] azx_interrupt+0xd7/0x190 [snd_hda_intel]
[  298.826866]  [<ffffffff81093d85>] handle_irq_event_percpu+0x55/0x1f0
[  298.826866]  [<ffffffff81093f57>] handle_irq_event+0x37/0x60
[  298.826866]  [<ffffffff81096514>] handle_fasteoi_irq+0x54/0xd0
[  298.826866]  [<ffffffff8100404d>] handle_irq+0x1d/0x30
[  298.826866]  [<ffffffff81003ce8>] do_IRQ+0x58/0xe0
[  299.209351]  [<ffffffff8142ea2b>] common_interrupt+0x6b/0x6b
[  299.209351]  <EOI>  [<ffffffff8106fbd1>] ? tick_nohz_stop_sched_tick+0x281/0x3c0
[  299.209351]  [<ffffffff81000ac9>] cpu_idle+0x79/0x100
[  299.209351]  [<ffffffff8142770a>] start_secondary+0x23c/0x243