Comment 15 for bug 1503655

Not 100% sure it's the same problem, my dmesg looks like this:

[ 68.951259] BUG: unable to handle kernel paging request at ffffebe000000000
[ 68.951264] IP: [<ffffffff811d5f59>] kmem_cache_free+0x69/0x200
[ 68.951270] PGD 0
[ 68.951272] Oops: 0000 [#1] SMP
[ 68.951274] Modules linked in: xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat ipt_REJECT nf_reject_ipv4 ebtable_filter ebtables binfmt_misc rfcomm bnep bridge stp llc ip6table_filter ip6_tables nf_conntrack_ipv4 nf_defrag_ipv4 xt_tcpudp xt_recent xt_conntrack nf_conntrack iptable_filter ip_tables x_tables uas usb_storage snd_hda_codec_hdmi nvidia(POE) intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel arc4 rtl8821ae snd_hda_codec_realtek kvm snd_hda_codec_generic snd_soc_rt5640 btcoexist snd_soc_rl6231 crct10dif_pclmul snd_soc_core snd_hda_intel rtl_pci crc32_pclmul snd_hda_controller joydev ghash_clmulni_intel rtlwifi aesni_intel snd_hda_codec snd_compress mac80211 snd_hwdep snd_pcm_dmaengine aes_x86_64 snd_pcm lrw gf128mul
[ 68.951302] snd_seq_midi glue_helper snd_seq_midi_event ablk_helper snd_rawmidi cfg80211 cryptd btusb snd_seq bluetooth hid_logitech_hidpp snd_seq_device snd_timer drm snd i2c_hid mei_me soundcore shpchp mei ie31200_edac lpc_ich edac_core dw_dmac i2c_designware_platform snd_soc_sst_acpi dw_dmac_core 8250_dw spi_pxa2xx_platform video i2c_designware_core mac_hid parport_pc ppdev lp parport autofs4 hid_logitech_dj usbhid hid raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq ahci r8169 libahci raid1 mii raid0 multipath linear sdhci_acpi sdhci
[ 68.951328] CPU: 2 PID: 2451 Comm: pulseaudio Tainted: P OE 3.19.0-31-generic #35-Ubuntu
[ 68.951330] Hardware name: GIGABYTE GB-BXi7G3-760/M4HM8BP-00, BIOS F1 08/12/2014
[ 68.951331] task: ffff880211bbc4b0 ti: ffff8801de474000 task.ti: ffff8801de474000
[ 68.951333] RIP: 0010:[<ffffffff811d5f59>] [<ffffffff811d5f59>] kmem_cache_free+0x69/0x200
[ 68.951336] RSP: 0018:ffff8801de477dd8 EFLAGS: 00010286
[ 68.951337] RAX: 000001e000000000 RBX: 0000000000000000 RCX: 00007f46dbffd000
[ 68.951338] RDX: 000077ff80000000 RSI: 0000000000000000 RDI: ffff88021508c400
[ 68.951339] RBP: ffff8801de477df8 R08: 0000000000000000 R09: ffffffff8123b4f2
[ 68.951340] R10: ffff8801e379fda1 R11: ffffebe000000000 R12: ffff88021508c400
[ 68.951341] R13: ffff8801e379fb28 R14: 0000000000000000 R15: ffff8801f4514558
[ 68.951342] FS: 00007f46ee478780(0000) GS:ffff88021dc80000(0000) knlGS:0000000000000000
[ 68.951343] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 68.951344] CR2: ffffebe000000000 CR3: 00000001e07e3000 CR4: 00000000001407e0
[ 68.951346] Stack:
[ 68.951346] 0000000000000000 0000000000000000 ffff8801e379fae8 ffff8801e379fb28
[ 68.951348] ffff8801de477e28 ffffffff8123b4f2 0000000000000008 ffff8801e379fae8
[ 68.951350] 0000000000000000 0000000000000005 ffff8801de477e58 ffffffff8123b534
[ 68.951352] Call Trace:
[ 68.951357] [<ffffffff8123b4f2>] ep_unregister_pollwait.isra.7+0x72/0x90
[ 68.951359] [<ffffffff8123b534>] ep_remove+0x24/0xd0
[ 68.951361] [<ffffffff8123c2bf>] eventpoll_release_file+0x5f/0xa0
[ 68.951365] [<ffffffff811f6c58>] __fput+0x1d8/0x250
[ 68.951368] [<ffffffff811f6d1e>] ____fput+0xe/0x10
[ 68.951371] [<ffffffff81093f07>] task_work_run+0xb7/0xf0
[ 68.951375] [<ffffffff81014fe7>] do_notify_resume+0x97/0xb0
[ 68.951378] [<ffffffff817cc1ef>] int_signal+0x12/0x17
[ 68.951379] Code: ff 77 00 00 49 bb 00 00 00 00 00 ea ff ff 48 01 d8 48 0f 42 15 c9 40 a4 00 4c 8b 4d 08 48 01 d0 48 c1 e8 0c 48 c1 e0 06 49 01 c3 <49> 8b 03 f6 c4 80 0f 85 53 01 00 00 4c 8b 17 65 4c 03 15 f8 41
[ 68.951400] RIP [<ffffffff811d5f59>] kmem_cache_free+0x69/0x200
[ 68.951402] RSP <ffff8801de477dd8>
[ 68.951403] CR2: ffffebe000000000
[ 68.951405] ---[ end trace f976bce8b764902e ]---

I can login but later on I see same symptoms as others, cannot login via any means - lightdm, ssh, text virtual console. No errors it's just stuck after I enter password.