Additional info:
libreport version: 2.0.14
abrt_version:   2.0.13
cmdline:        BOOT_IMAGE=/vmlinuz-3.6.1-1.fc17.i686.PAE root=/dev/mapper/vg_pinkfloyd-lv_root ro rd.md=0 rd.dm=0 SYSFONT=True rd.luks.uuid=luks-2b8f6beb-7b54-45e0-a273-fe7b5bd77927 rd.lvm.lv=vg_pinkfloyd/lv_root LANG=fr_FR.UTF-8 rd.lvm.lv=vg_pinkfloyd/lv_swap KEYTABLE=fr-latin9 rhgb quiet
kernel:         3.6.1-1.fc17.i686.PAE

kernel_tainted_long:
:Proprietary module has not been loaded.
:Kernel has oopsed before

backtrace:
:BUG: unable to handle kernel NULL pointer dereference at 0000000b
:IP: [<c0629554>] selinux_task_to_inode+0x14/0x20
:*pdpt = 0000000033b22001 *pde = 0000000000000000 
:Oops: 0000 [#2] SMP 
:Modules linked in: fuse lockd sunrpc bnep bluetooth ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter nf_conntrack_ipv4 nf_defrag_ipv4 ip6_tables xt_state nf_conntrack uvcvideo videobuf2_vmalloc arc4 coretemp videobuf2_memops videobuf2_core snd_hda_codec_si3054 snd_hda_codec_realtek ath5k videodev ath microcode asus_laptop media snd_hda_intel mac80211 snd_hda_codec sparse_keymap cfg80211 snd_hwdep snd_seq rfkill atl2 sp5100_tco snd_seq_device snd_pcm serio_raw i2c_piix4 input_polldev snd_page_alloc snd_timer snd soundcore uinput xts gf128mul ata_generic pata_acpi dm_crypt usb_storage pata_atiixp video radeon i2c_algo_bit drm_kms_helper ttm drm i2c_core
:Pid: 846, comm: boinc_client Tainted: G      D      3.6.1-1.fc17.i686.PAE #1 ASUSTeK Computer Inc. F5RL                /F5RL      
:EIP: 0060:[<c0629554>] EFLAGS: 00210206 CPU: 0
:EIP is at selinux_task_to_inode+0x14/0x20
:EAX: 00000007 EBX: f3b36480 ECX: c0bdf3c0 EDX: f1f573f0
:ESI: f0354470 EDI: f0379e00 EBP: f641fdf4 ESP: f641fdf4
: DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
:CR0: 80050033 CR2: 0000000b CR3: 32d17000 CR4: 000007f0
:DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
:DR6: ffff0ff0 DR7: 00000400
:Process boinc_client (pid: 846, ti=f641e000 task=f3b31920 task.ti=f641e000)
:Stack:
: f641fdfc c0627964 f641fe10 c05a70dc f641fe6c 00000001 f641fef8 f641fe40
: c055f344 f4422020 f641fe24 c062711a f4109f10 fffffff6 f0379e00 00000002
: c415600b ccf0bab9 f641fef8 f641fe94 c055f6f3 f641fe64 c4ae8240 f641fef8
:Call Trace:
: [<c0627964>] security_task_to_inode+0x14/0x20
: [<c05a70dc>] pid_revalidate+0x6c/0xd0
: [<c055f344>] lookup_fast+0x2a4/0x2d0
: [<c062711a>] ? security_inode_permission+0x1a/0x20
: [<c055f6f3>] link_path_walk+0x143/0x750
: [<c0627434>] ? security_file_alloc+0x14/0x20
: [<c0562967>] path_openat+0x77/0x3b0
: [<c0536579>] ? free_pages_and_swap_cache+0x99/0xb0
: [<c0524cbb>] ? tlb_flush_mmu+0x5b/0x90
: [<c0562e81>] do_filp_open+0x31/0x80
: [<c0543099>] ? kmem_cache_alloc+0x29/0x140
: [<c056d7fc>] ? alloc_fd+0x3c/0xe0
: [<c055e370>] ? getname_flags+0x40/0xd0
: [<c0554285>] do_sys_open+0xe5/0x1c0
: [<c0554392>] sys_open+0x32/0x40
: [<c09793df>] sysenter_do_call+0x12/0x28
: [<c0970000>] ? arp_ignore+0x70/0x74
:Code: 80 dc 02 00 00 5d 8b 40 58 8b 40 04 89 02 c3 90 8d b4 26 00 00 00 00 55 89 e5 66 66 66 66 90 8b 80 dc 02 00 00 8b 52 24 8b 40 58 <8b> 40 04 c6 42 16 01 89 42 10 5d c3 55 89 e5 66 66 66 66 90 85
:EIP: [<c0629554>] selinux_task_to_inode+0x14/0x20 SS:ESP 0068:f641fdf4
:CR2: 000000000000000b