Comment 39 for bug 922906

Luis, yes, the problem still exists in the Precise. For Quantal this oops too occurs.
With 3.8-rc2-raring all work...

dmesg (3.2.0-36.56):
[ 309.707808] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 309.707898] IP: [<ffffffff8103ec49>] __ticket_spin_lock+0x9/0x30
[ 309.707941] PGD 0
[ 309.707957] Oops: 0002 [#1] SMP
[ 309.707980] CPU 0
[ 309.707991] Modules linked in: hidp btusb bnep rfcomm snd_hda_codec_realtek snd_hda_intel snd_hda_codec parport_pc snd_hwdep arc4 ppdev snd_pcm ath3k b43 snd_seq_midi bluetooth snd_rawmidi mmc_block uvcvideo snd_seq_midi_event snd_seq videodev joydev snd_timer snd_seq_device pcmcia mac80211 tifm_sd v4l2_compat_ioctl32 yenta_socket snd tifm_7xx1 pcmcia_rsrc tifm_core pcmcia_core acer_wmi soundcore cfg80211 psmouse snd_page_alloc serio_raw sparse_keymap bcma mac_hid lp parport usbhid hid i915 drm_kms_helper drm wmi i2c_algo_bit sky2 ssb video
[ 309.708331]
[ 309.708341] Pid: 2284, comm: khidpd_04580058 Not tainted 3.2.0-36-generic #56-Ubuntu Acer, inc. Aspire 5570 /Prespa1
[ 309.708401] RIP: 0010:[<ffffffff8103ec49>] [<ffffffff8103ec49>] __ticket_spin_lock+0x9/0x30
[ 309.708442] RSP: 0018:ffff88000a575d90 EFLAGS: 00010082
[ 309.708469] RAX: 0000000000010000 RBX: 0000000000000282 RCX: 0000000180150013
[ 309.708501] RDX: 0000000000000002 RSI: 0000000000000282 RDI: 0000000000000000
[ 309.708533] RBP: ffff88000a575d90 R08: 0000000000000001 R09: 0000000000000000
[ 309.708565] R10: 0000000000000000 R11: 0000000000000001 R12: ffff88000a575e80
[ 309.708597] R13: 0000000000000002 R14: ffff8800b9312470 R15: ffff8800b9311400
[ 309.708630] FS: 0000000000000000(0000) GS:ffff8800bf400000(0000) knlGS:0000000000000000
[ 309.708667] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 309.708694] CR2: 0000000000000000 CR3: 0000000001c05000 CR4: 00000000000006f0
[ 309.708726] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 309.708758] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 309.708791] Process khidpd_04580058 (pid: 2284, threadinfo ffff88000a574000, task ffff880014895c00)
[ 309.708830] Stack:
[ 309.708842] ffff88000a575da0 ffffffff8103ecf9 ffff88000a575dc0 ffffffff8165d69e
[ 309.708883] 0000000000000000 ffff88000a575e80 ffff88000a575e00 ffffffff8108bb8a
[ 309.708923] ffff88000ab7c400 ffff8800b9311470 ffff8800b9312470 000000000000007d
[ 309.708963] Call Trace:
[ 309.708978] [<ffffffff8103ecf9>] default_spin_lock_flags+0x9/0x10
[ 309.709010] [<ffffffff8165d69e>] _raw_spin_lock_irqsave+0x2e/0x40
[ 309.709042] [<ffffffff8108bb8a>] prepare_to_wait+0x2a/0x90
[ 309.709071] [<ffffffffa043611d>] hidp_session+0x3bd/0x510 [hidp]
[ 309.709101] [<ffffffff810606a0>] ? try_to_wake_up+0x200/0x200
[ 309.709131] [<ffffffff810606a0>] ? try_to_wake_up+0x200/0x200
[ 309.709160] [<ffffffff8108bd20>] ? add_wait_queue+0x60/0x60
[ 309.709188] [<ffffffffa0435d60>] ? hidp_recv_ctrl_frame+0xf0/0xf0 [hidp]
[ 309.709220] [<ffffffff8108b27c>] kthread+0x8c/0xa0
[ 309.709244] [<ffffffff81667b74>] kernel_thread_helper+0x4/0x10
[ 309.709272] [<ffffffff8108b1f0>] ? flush_kthread_worker+0xa0/0xa0
[ 309.709303] [<ffffffff81667b70>] ? gs_change+0x13/0x13
[ 309.709326] Code: 00 00 48 c7 c1 51 ea 03 81 48 c7 c2 4e ea 03 81 e9 dd fe ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 55 b8 00 00 01 00 48 89 e5 <f0> 0f c1 07 89 c2 c1 ea 10 66 39 c2 74 13 66 0f 1f 84 00 00 00
[ 309.709547] RIP [<ffffffff8103ec49>] __ticket_spin_lock+0x9/0x30
  309.709580] RSP <ffff88000a575d90>
[ 309.709596] CR2: 0000000000000000