Description of problem:
my machine's saying USB 3 module caused its sudden death. And I know nothing otherwise besides 1 of my usb drives was connected onto my machine for several days

Additional info:
libreport version: 2.0.14
abrt_version:   2.0.13
cmdline:        BOOT_IMAGE=/vmlinuz-3.6.1-1.fc17.x86_64 root=/dev/mapper/vg-lv_root ro rd.md=0 rd.dm=0 KEYTABLE=us SYSFONT=True rd.lvm.lv=vg/lv_root rd.luks=0 rd.lvm.lv=vg/lv_swap LANG=en_US.UTF-8 rhgb quiet
kernel:         3.6.1-1.fc17.x86_64

kernel_tainted_long:
:Proprietary module has not been loaded.
:Modules from drivers/staging are loaded.

backtrace:
:BUG: unable to handle kernel NULL pointer dereference at           (null)
:IP: [<ffffffff810d459e>] unroll_tree_refs+0x6e/0x100
:PGD 3aba1f067 PUD 3dc1dc067 PMD 0 
:Oops: 0000 [#1] SMP 
:Modules linked in: tcp_lp fuse vboxpci(O) vboxnetadp(O) vboxnetflt(O) ebtable_nat ebtables vboxdrv(O) ipt_MASQUERADE iptable_nat nf_nat xt_CHECKSUM iptable_mangle bridge stp llc lockd sunrpc bnep bluetooth be2iscsi iscsi_boot_sysfs bnx2i cnic uio cxgb4i cxgb4 cxgb3i cxgb3 mdio libcxgbi ib_iser rdma_cm ib_addr iw_cm ib_cm ib_sa ib_mad ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi ip6t_REJECT nf_conntrack_ipv4 nf_defrag_ipv4 nf_conntrack_ipv6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device snd_pcm snd_page_alloc eeepc_wmi snd_timer asus_wmi snd r8169 i2c_i801 coretemp sparse_keymap iTCO_wdt iTCO_vendor_support rfkill soundcore mii lpc_ich mfd_core microcode mei vhost_net tun macvtap macvlan kvm_intel kvm uinput binfmt_misc usb_storage crc32c_intel ghash_clmulni_intel wmi i915 video i2c_algo_bit drm_kms_helper drm i2c_core
:CPU 1 
:Pid: 5984, comm: xulrunner Tainted: G         C O 3.6.1-1.fc17.x86_64 #1 System manufacturer System Product Name/P8Z77-V LX
:RIP: 0010:[<ffffffff810d459e>]  [<ffffffff810d459e>] unroll_tree_refs+0x6e/0x100
:RSP: 0018:ffff8803abbadee8  EFLAGS: 00010646
:RAX: 0000000000000000 RBX: 00000000ffffffff RCX: 0000000000000001
:RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8804047fcc00
:RBP: ffff8803abbadf28 R08: 0000000000000000 R09: 0000000000000001
:R10: 0000000000000000 R11: 0000000000000000 R12: ffff8804047fcc00
:R13: ffff8803ddcd0000 R14: 0000000000000000 R15: 0000000000000000
:FS:  00007f66373b1740(0000) GS:ffff88041fa80000(0000) knlGS:0000000000000000
:CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
:CR2: 0000000000000000 CR3: 00000003abbee000 CR4: 00000000000427e0
:DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
:DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
:Process xulrunner (pid: 5984, threadinfo ffff8803abbac000, task ffff8803ddcd0000)
:Stack:
: ffff8804047fce60 00000000047fcc00 ffff8803ddcd0000 ffff8804047fce80
: ffff8804047fcc00 ffff8803ddcd0000 ffff8804047fce78 ffff8804047fce48
: ffff8803abbadf78 ffffffff810d797a ffff8803abbadf78 0000000000000000
:Call Trace:
: [<ffffffff810d797a>] __audit_syscall_exit+0x33a/0x450
: [<ffffffff81622810>] sysret_audit+0x17/0x21
:Code: 5a ff 74 27 66 0f 1f 84 00 00 00 00 00 4c 63 e3 83 eb 01 4b 8b 7c e7 08 e8 80 60 00 00 83 fb ff 4b c7 44 e7 08 00 00 00 00 75 e2 <4d> 8b 3f 4d 39 bd f0 02 00 00 ba 1f 00 00 00 75 c1 bb 1e 00 00 
:RIP  [<ffffffff810d459e>] unroll_tree_refs+0x6e/0x100
: RSP <ffff8803abbadee8>
:CR2: 0000000000000000