Looks wifi related:

[   26.171255] cfg80211: Updating information on frequency 2484 MHz for a 20 MHz width channel with regulatory rule:
[   26.171257] cfg80211: 2474000 KHz - 2494000 KHz @ 20000 KHz), (600 mBi, 2000 mBm)
[   26.246994] ieee80211 phy0: Selected rate control algorithm 'minstrel_ht'
[   26.247240] Registered led device: rt2500pci-phy0::radio
[   26.247257] Registered led device: rt2500pci-phy0::quality
[   27.287367] BUG: unable to handle kernel NULL pointer dereference at 0000000000000080
[   27.288011] IP: [<ffffffff8156056e>] __netif_schedule+0xe/0x70
[   27.288011] PGD 3927f067 PUD 37fed067 PMD 0 
[   27.288011] Oops: 0002 [#1] SMP 
[   27.288011] CPU 0 
[   27.288011] Modules linked in:
[   27.288011]  snd_via82xx_modem(+) gameport(+) snd_ac97_codec ac97_bus snd_pcm snd_mpu401_uart arc4 snd_seq_midi rt2500pci rt2x00pci snd_rawmidi rt2x00lib snd_seq_midi_event mac80211 snd_seq snd_timer snd_seq_device snd cfg80211 amd64_edac_mod dm_multipath edac_core serio_raw scsi_dh eeprom_93cx6 i2c_viapro k8temp edac_mce_amd snd_page_alloc soundcore shpchp mac_hid parport_pc bnep ppdev bluetooth lp parport squashfs overlayfs nls_utf8 isofs dm_raid45 xor dm_mirror dm_region_hash dm_log hid_generic radeon usbhid ttm drm_kms_helper hid usb_storage drm floppy i2c_algo_bit pata_via sata_via skge
[   27.288011] 
[   27.288011] Pid: 1730, comm: NetworkManager Not tainted 3.5.0-3-generic #3-Ubuntu To Be Filled By O.E.M. To Be Filled By O.E.M./A8V Deluxe
[   27.288011] RIP: 0010:[<ffffffff8156056e>]  [<ffffffff8156056e>] __netif_schedule+0xe/0x70
[   27.288011] RSP: 0018:ffff8800374b54d8  EFLAGS: 00010096
[   27.288011] RAX: ffff880039506140 RBX: ffff88003a5c07c0 RCX: ffff88003be74580
[   27.288011] RDX: 00000000ffffffff RSI: 0000000000000086 RDI: 0000000000000000
[   27.288011] RBP: ffff8800374b54e8 R08: ffff88003ee13980 R09: 0000000000000000
[   27.288011] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000140
[   27.288011] R13: ffff88003a5c07c1 R14: 0000000000000000 R15: ffff88003be752b8
[   27.288011] FS:  00007f2565a85800(0000) GS:ffff88003ee00000(0000) knlGS:0000000000000000
[   27.288011] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   27.288011] CR2: 0000000000000080 CR3: 0000000039230000 CR4: 00000000000007f0
[   27.288011] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   27.288011] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[   27.288011] Process NetworkManager (pid: 1730, threadinfo ffff8800374b4000, task ffff880038695c00)
[   27.288011] Stack:
[   27.288011]  ffff8800374b5508 ffff88003a5c07c0 ffff8800374b5548 ffffffffa0354675
[   27.288011]  ffff88003cb81cec ffff88003be74580 ffff8800374b5528 ffff88003a5c07c0
[   27.288011]  0000000000000086 ffff88003be746f8 0000000000000000 0000000000000286
[   27.288011] Call Trace:
[   27.288011]  [<ffffffffa0354675>] ieee80211_propagate_queue_wake+0x105/0x110 [mac80211]
[   27.288011]  [<ffffffffa0354772>] __ieee80211_wake_queue+0xf2/0x110 [mac80211]
[   27.288011]  [<ffffffffa03547da>] ieee80211_wake_queue_by_reason+0x4a/0x70 [mac80211]
[   27.288011]  [<ffffffffa0354810>] ieee80211_wake_queue+0x10/0x20 [mac80211]
[   27.288011]  [<ffffffffa03b8d8f>] rt2x00queue_unpause_queue+0x3f/0x60 [rt2x00lib]
[   27.288011]  [<ffffffffa03b8f62>] rt2x00queue_flush_queue+0x72/0xc0 [rt2x00lib]
[   27.288011]  [<ffffffffa03b7aa8>] rt2x00mac_flush+0x38/0x70 [rt2x00lib]
[   27.288011]  [<ffffffffa0341658>] __ieee80211_recalc_idle+0x278/0x2f0 [mac80211]
[   27.288011]  [<ffffffffa034203b>] ieee80211_do_open+0x1bb/0xa90 [mac80211]
[   27.288011]  [<ffffffffa034297d>] ieee80211_open+0x6d/0x80 [mac80211]
[   27.288011]  [<ffffffff815675ef>] __dev_open+0x9f/0xf0
[   27.288011]  [<ffffffff815678a1>] __dev_change_flags+0xa1/0x180
[   27.288011]  [<ffffffff81567a38>] dev_change_flags+0x28/0x70
[   27.288011]  [<ffffffff81573817>] do_setlink+0x357/0x9e0
[   27.288011]  [<ffffffff8133b721>] ? nla_parse+0x31/0xe0
[   27.288011]  [<ffffffff8133b721>] ? nla_parse+0x31/0xe0
[   27.288011]  [<ffffffff815760fe>] rtnl_newlink+0x37e/0x560
[   27.288011]  [<ffffffff812e1ed6>] ? apparmor_capable+0x26/0x90
[   27.288011]  [<ffffffff81575944>] rtnetlink_rcv_msg+0x114/0x2f0
[   27.288011]  [<ffffffff81575830>] ? __rtnl_unlock+0x20/0x20
[   27.288011]  [<ffffffff8158e151>] netlink_rcv_skb+0xa1/0xb0
[   27.288011]  [<ffffffff81572ca5>] rtnetlink_rcv+0x25/0x40
[   27.288011]  [<ffffffff8158db0d>] netlink_unicast+0x19d/0x220
[   27.288011]  [<ffffffff8158de4d>] netlink_sendmsg+0x2bd/0x330
[   27.288011]  [<ffffffff8154eac8>] sock_sendmsg+0xf8/0x130
[   27.288011]  [<ffffffff8154e93d>] ? sock_recvmsg+0xfd/0x130
[   27.288011]  [<ffffffff81146e31>] ? __do_fault+0x411/0x520
[   27.288011]  [<ffffffff8154fd6a>] ? move_addr_to_kernel+0x5a/0xc0
[   27.288011]  [<ffffffff8155ba36>] ? verify_iovec+0x56/0xd0
[   27.288011]  [<ffffffff8154ef0c>] __sys_sendmsg+0x3ac/0x3c0
[   27.288011]  [<ffffffff8114afc9>] ? handle_mm_fault+0x259/0x320
[   27.288011]  [<ffffffff8108a48f>] ? __dequeue_entity+0x2f/0x50
[   27.288011]  [<ffffffff810125be>] ? __switch_to+0x16e/0x420
[   27.288011]  [<ffffffff81083a0a>] ? finish_task_switch+0x4a/0xf0
[   27.288011]  [<ffffffff81550ca9>] sys_sendmsg+0x49/0x90
[   27.288011]  [<ffffffff8167cd29>] system_call_fastpath+0x16/0x1b
[   27.288011] Code: 00 00 00 83 ee 04 48 83 c7 04 e9 58 ff ff ff 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 53 48 83 ec 08 66 66 66 66 90 <3e> 0f ba af 80 00 00 00 00 19 c0 85 c0 75 4c 9c 58 66 66 90 66 
[   27.288011] RIP  [<ffffffff8156056e>] __netif_schedule+0xe/0x70
[   27.288011]  RSP <ffff8800374b54d8>
[   27.288011] CR2: 0000000000000080
[   27.683851] ---[ end trace 7a61a837fd7ffaa0 ]---
[   27.777608] snd_via82xx_modem 0000:00:11.6: enabling device (0000 -> 0001)
[   28.177303] cfg80211: Updating information on frequency 2412 MHz for a 20 MHz width channel with regulatory rule: