Description of problem:
Unclear how to reproduce it.

* Using Mate on F23
* App-wise,I had a Terminator session open, a Libre Office spreadsheet going, and a Chrome browser with 12-18 tabs
* I opened another tab to google something (Ctrl+T), got an "Aw snap! Something's busticated" from Chrome.
* Tried a reload with Ctrl+R. Same "Aw snap!"
* Tried a second reload for shits and grins and the UI locked.
* HW reset
* And here we are reporting it

Additional info:
reporter:       libreport-2.6.3
BUG: unable to handle kernel paging request at 00000000000177e0
IP: [<ffffffff810e919e>] queued_spin_lock_slowpath+0xfe/0x170
PGD 0 
Oops: 0002 [#1] SMP 
Modules linked in: fuse ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 xt_conntrack ebtable_broute bridge ebtable_nat ebtable_filter ebtables ip6table_raw ip6table_mangle ip6table_security ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_filter ip6_tables iptable_raw iptable_mangle iptable_security iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack usblp vfat fat kvm_amd joydev snd_hda_codec_hdmi kvm snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hda_core crct10dif_pclmul snd_hwdep crc32_pclmul snd_seq crc32c_intel snd_seq_device edac_mce_amd edac_core fam15h_power k10temp sp5100_tco snd_pcm snd_timer shpchp i2c_piix4 snd soundcore acpi_cpufreq nfsd auth_rpcgss nfs_acl lockd grace sunrpc hid_logitech_hidpp hid_logitech_dj
 ata_generic pata_acpi nouveau video mxm_wmi wmi i2c_algo_bit drm_kms_helper ttm 8021q garp stp llc serio_raw drm mrp pata_atiixp r8169 mii fjes uas usb_storage
CPU: 3 PID: 27372 Comm: Chrome_ProcessL Not tainted 4.3.3-300.fc23.x86_64 #1
Hardware name: Gigabyte Technology Co., Ltd. To be filled by O.E.M./970A-DS3P, BIOS FB 10/31/2014
task: ffff8800bf741e00 ti: ffff880785158000 task.ti: ffff880785158000
RIP: 0010:[<ffffffff810e919e>]  [<ffffffff810e919e>] queued_spin_lock_slowpath+0xfe/0x170
RSP: 0018:ffff88078515bc70  EFLAGS: 00010202
RAX: 000000000000205f RBX: ffff8807eaf08848 RCX: 00000000000177e0
RDX: ffff88083ecd77c0 RSI: 0000000000100000 RDI: ffff8807eaf088a0
RBP: ffff88078515bc70 R08: 0000000000000101 R09: 0000000000000246
R10: 00000000000010fd R11: ffff8807eaf08780 R12: ffff8804bcbecc80
R13: ffff88078515bcd8 R14: ffff8804bcbecc00 R15: ffff8804bcbecc58
FS:  00007f91afbad700(0000) GS:ffff88083ecc0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 00000000000177e0 CR3: 00000007c122f000 CR4: 00000000000406e0
Stack:
 ffff88078515bc80 ffffffff817812b0 ffff88078515bcc0 ffffffff8123acd9
 ffff8807eaf08848 ffff88078515bcd8 ffff8807eaf08780 0000000000006aeb
 ffff88081ae164a0 0000000000006aeb ffff88078515bd10 ffffffff8123b009
Call Trace:
 [<ffffffff817812b0>] _raw_spin_lock+0x20/0x30
 [<ffffffff8123acd9>] shrink_dentry_list+0x229/0x2a0
 [<ffffffff8123b009>] d_invalidate+0xb9/0x110
 [<ffffffff812951f6>] proc_flush_task+0xa6/0x1a0
 [<ffffffff810a1cc2>] release_task+0x42/0x460
 [<ffffffff810d0580>] ? thread_group_cputime_adjusted+0x50/0x70
 [<ffffffff810a265d>] wait_consider_task+0x57d/0xb70
 [<ffffffff810a2d4a>] do_wait+0xfa/0x250
 [<ffffffff810a3f4b>] SyS_wait4+0x7b/0xf0
 [<ffffffff810a1ad0>] ? task_stopped_code+0x50/0x50
 [<ffffffff8178162e>] entry_SYSCALL_64_fastpath+0x12/0x71
Code: 87 47 02 c1 e0 10 85 c0 74 38 48 89 c1 c1 e8 12 48 c1 e9 0c 83 e8 01 83 e1 30 48 98 48 81 c1 c0 77 01 00 48 03 0c c5 20 1e d3 81 <48> 89 11 8b 42 08 85 c0 75 0d f3 90 8b 42 08 85 c0 74 f7 eb 02 
RIP  [<ffffffff810e919e>] queued_spin_lock_slowpath+0xfe/0x170
 RSP <ffff88078515bc70>
CR2: 00000000000177e0