general protection fault: 0000 [#1] SMP
CPU 0
Modules linked in: snd_hda_codec_analog snd_hda_intel snd_hda_codec snd_pcm snd_page_alloc sr_mod forcedeth cdrom snd_timer snd powernow_k8 ohci_hcd mperf ehci_hcd freq_table kvm_amd usbcore kvm usb_common k8temp soundcore pata_amd

Pid: 1287, comm: devfs Tainted: G        W    3.5.0-rc7-ija1+ #94 System manufacturer System Product Name/M2N-E
RIP: 0010:[<ffffffff811ea975>]  [<ffffffff811ea975>] check_tty_count+0x36/0xa0
RSP: 0018:ffff880139eafbb8  EFLAGS: 00010203
RAX: 65742e746978652e RBX: 0000000000000002 RCX: 0000000000000000
RDX: ffff880139db7a08 RSI: ffffffff8142a000 RDI: ffffffff817ca2c8
RBP: ffff880139eafbd8 R08: ffffffff8142a000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff880139db7800
R13: 0000000000200002 R14: ffff88013aa9b690 R15: 0000000000008002
FS:  00007f945d5c8700(0000) GS:ffff88013fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f945c7abac1 CR3: 0000000139eb5000 CR4: 00000000000007f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process devfs (pid 1287, threadinfo ffff880139eae000, task ffff88013aa9b690)
Stack:
 ffff880139eafbd8 ffffffff8142a000 ffff880139e71500 ffff88013b3c70a8
 ffff880139eafc48 ffffffff811ed15d ffff880139db7800 ffff880139e71538
 fffffffb39eafc28 ffff88013b1e8000 00000000000000af 0000000200000000
Call Trace:
 [<ffffffff811ed15d>] tty_open+0x1b8/0x37a
 [<ffffffff810dd841>] chrdev_open+0x120/0x149
 [<ffffffff810dd721>] ? cdev_put+0x20/0x20
 [<ffffffff810d8f22>] do_dentry_open.isra.18+0x162/0x231
 [<ffffffff810d9bb1>] nameidata_to_filp+0x3d/0x7f
 [<ffffffff810e594e>] do_last+0x546/0x6f1
 [<ffffffff810e61ff>] path_openat+0xc7/0x359
 [<ffffffff810c27f3>] ? handle_mm_fault+0x162/0x177
 [<ffffffff810e657a>] do_filp_open+0x33/0x81
 [<ffffffff810effe5>] ? alloc_fd+0x6d/0xfc
 [<ffffffff810d9cf3>] do_sys_open+0x100/0x192
 [<ffffffff810d9da1>] sys_open+0x1c/0x1e
 [<ffffffff813efa22>] system_call_fastpath+0x16/0x1b
Code: c7 c8 a2 7c 81 53 31 db 48 83 ec 10 48 89 75 e8 e8 36 e9 1f 00 49 8b 84 24 08 02 00 00 49 8d 94 24 08 02 00 00 4c 8b 45 e8 eb 05 <48> 8b 00 ff c3 48 39 d0 75 f6 80 05 42 f9 5d 00 01 49 8b 44 24
RIP [<ffffffff811ea975>] check_tty_count+0x36/0xa0
 RSP <ffff880139eafbb8>
---[ end trace 777fdcbd2ab06483 ]---