Additional info:
BUG: unable to handle kernel NULL pointer dereference at 0000000000000020
IP: [<ffffffff8117a688>] kmem_cache_alloc+0x58/0x160
PGD 146bce067 PUD 146326067 PMD 0 
Oops: 0000 [#1] SMP 
Modules linked in: des_generic md4 nls_utf8 cifs dns_resolver fscache lockd sunrpc rfcomm bnep ip6t_REJECT nf_conntrack_ipv6 nf_conntrack_ftp nf_defrag_ipv6 nf_conntrack_netbios_ns nf_conntrack_broadcast ip6table_filter nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack ip6_tables snd_hda_codec_hdmi snd_hda_codec_idt arc4 brcmsmac snd_hda_intel snd_hda_codec snd_hwdep cordic snd_seq btusb brcmutil uvcvideo mac80211 iTCO_wdt videobuf2_vmalloc videobuf2_memops videobuf2_core videodev hp_wmi snd_seq_device bluetooth iTCO_vendor_support snd_pcm media cfg80211 coretemp sparse_keymap r8169 bcma mei mii snd_page_alloc snd_timer snd rfkill soundcore lpc_ich i2c_i801 mfd_core kvm microcode uinput crc32c_intel ghash_clmulni_intel wmi i915 video i2c_algo_bit drm_kms_helper drm i2c_core
CPU 3 
Pid: 773, comm: id Not tainted 3.6.10-2.fc17.x86_64 #1 Hewlett-Packard HP Pavilion g6 Notebook PC      /166F
RIP: 0010:[<ffffffff8117a688>]  [<ffffffff8117a688>] kmem_cache_alloc+0x58/0x160
RSP: 0018:ffff880147749cf8  EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000001
RDX: 0000000000000540 RSI: 00000000000080d0 RDI: ffff880149560800
RBP: ffff880147749d38 R08: 0000000000017990 R09: 0000000000000000
R10: ffff88014598a900 R11: 0000000000000001 R12: 0000000000000020
R13: 00000000000080d0 R14: ffff880149560800 R15: ffffffff811cefa8
FS:  00007f904a2ec800(0000) GS:ffff88014fac0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000020 CR3: 0000000146359000 CR4: 00000000000407e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process id (pid: 773, threadinfo ffff880147748000, task ffff880145288000)
Stack:
 ffff880147749da8 ffffffff8119c297 ffff880147749dd8 0000000000000001
 ffff880147b056a0 0000000000000000 0000000000000000 ffff8801446a3710
 ffff880147749d98 ffffffff811cefa8 ffff8801446a3700 0000000000000024
Call Trace:
 [<ffffffff8119c297>] ? link_path_walk+0x77/0x880
 [<ffffffff811cefa8>] fsnotify_create_event+0x48/0x1a0
 [<ffffffff811ce1e2>] send_to_group+0x1b2/0x250
 [<ffffffff8119fcaa>] ? path_openat+0xba/0x4d0
 [<ffffffff811ce470>] fsnotify+0x1f0/0x340
 [<ffffffff8118f6e8>] do_sys_open+0x158/0x1e0
 [<ffffffff8118f791>] sys_open+0x21/0x30
 [<ffffffff816270e9>] system_call_fastpath+0x16/0x1b
Code: bf 36 4a 00 4d 8b 06 65 4c 03 04 25 c8 db 00 00 49 8b 50 08 4d 8b 20 4d 85 e4 0f 84 a8 00 00 00 49 63 46 20 4d 8b 06 41 f6 c0 0f <49> 8b 1c 04 0f 85 d2 00 00 00 48 8d 4a 01 4c 89 e0 65 49 0f c7 
RIP  [<ffffffff8117a688>] kmem_cache_alloc+0x58/0x160
 RSP <ffff880147749cf8>
CR2: 0000000000000020