BUG: unable to handle kernel NULL pointer dereference at (null)
IP: [<ffffffff8107f22e>] kfifo_alloc+0x2e/0xb0
PGD 135131067 PUD 12f898067 PMD 0 
Oops: 0002 [#1] SMP 
last sysfs file: /sys/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda1/alignment_offset
CPU 0 
Modules linked in: lirc_serial lirc_mceusb lirc_dev oss_usb oss_hdaudio osscore joydev coretemp snd_usb_audio snd_usbmidi_lib snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_seq_device snd_hda_codec_atihdmi snd_hda_codec_idt snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_timer uvcvideo snd soundcore snd_page_alloc i2c_i801 videodev lib80211_crypt_tkip v4l1_compat v4l2_compat_ioctl32 r852 wl(P) sm_common nand nand_ids dell_wmi nand_ecc dell_laptop mtd dcdbas lib80211 psmouse serio_raw lp parport vga16fb vgastate hid_a4tech usbhid hid usb_storage radeon ttm video drm_kms_helper output sdhci_pci sdhci tg3 firewire_ohci firewire_core crc_itu_t led_class ahci libahci drm intel_agp i2c_algo_bit

Pid: 1186, comm: lircd Tainted: P            2.6.35-6-generic #9-Ubuntu 0P786H/Studio 1737
RIP: 0010:[<ffffffff8107f22e>]  [<ffffffff8107f22e>] kfifo_alloc+0x2e/0xb0
RSP: 0018:ffff88013077fbe8  EFLAGS: 00010286
RAX: ffff88013874c800 RBX: 0000000000000000 RCX: ffffffff8107f229
RDX: ffff88013874d000 RSI: 00000000000000d0 RDI: 0000000000000246
RBP: ffff88013077fbf8 R08: 0000000000000000 R09: 0000000000000246
R10: 0000000000000000 R11: 0000000000000002 R12: 0000000000000400
R13: ffffffffa04bfe80 R14: ffffffff81ced5e0 R15: ffff880139ea9d40
FS:  00007f00c65c9700(0000) GS:ffff880001e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000013067b000 CR4: 00000000000406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process lircd (pid: 1186, threadinfo ffff88013077e000, task ffff8801306f96e0)
Stack:
 ffff880139e63f00 00000000fffffff0 ffff88013077fc18 ffffffffa04beb95
<0> ffff88013745cc00 ffff880139e63f00 ffff88013077fc48 ffffffffa047f3ab
<0> 0000000000000000 0000000000000000 ffff88013745cc00 ffffffffa0481340
Call Trace:
 [<ffffffffa04beb95>] set_use_inc+0x55/0x170 [lirc_serial]
 [<ffffffffa047f3ab>] irctl_open+0x11b/0x210 [lirc_dev]
 [<ffffffff8115552a>] chrdev_open+0x10a/0x200
 [<ffffffff81155420>] ? chrdev_open+0x0/0x200
 [<ffffffff8114f995>] __dentry_open+0xe5/0x330
 [<ffffffff8125f49f>] ? security_inode_permission+0x1f/0x30
 [<ffffffff8114fcf4>] nameidata_to_filp+0x54/0x70
 [<ffffffff8115c888>] finish_open+0xe8/0x1d0
 [<ffffffff811654ef>] ? dput+0xdf/0x1b0
 [<ffffffff8115dce6>] do_last+0x86/0x460
 [<ffffffff8116001b>] do_filp_open+0x21b/0x660
 [<ffffffff8116b80a>] ? alloc_fd+0x10a/0x150
 [<ffffffff8114f739>] do_sys_open+0x69/0x170
 [<ffffffff8114f880>] sys_open+0x20/0x30
 [<ffffffff8100a0f2>] system_call_fastpath+0x16/0x1b
Code: e5 41 54 53 0f 1f 44 00 00 48 89 fb 89 f7 41 89 f4 48 85 ff 48 8d 47 ff 74 33 48 85 f8 75 2e 89 d6 e8 b7 33 0c 00 48 85 c0 74 52 <48> 89 03 44 89 63 08 31 c0 c7 43 10 00 00 00 00 c7 43 0c 00 00 
RIP  [<ffffffff8107f22e>] kfifo_alloc+0x2e/0xb0
 RSP <ffff88013077fbe8>
CR2: 0000000000000000
---[ end trace 60cb192b4281aae8 ]---