Comment 2 for bug 1668356

DHCPREQUEST of 10.34.242.77 on eth0 to 10.32.65.65 port 67 (xid=0x30fdf923)
BUG: unable to handle kernel NULL pointer dereference at (null)
IP: [<ffffffff810fa7e3>] timecounter_read+0x13/0x60
PGD 0
Oops: 0000 [#1] SMP
Modules linked in: rfcomm ipt_MASQUERADE nf_nat_masquerade_ipv4 xt_multiport xfrm_user xfrm_algo iptable_nat nf_nat_ipv4 br_netfilter bridge stp llc aufs pl2303 usbserial bnep arc4 snd_hda_codec_hdmi snd_soc_skl snd_soc_skl_ipc snd_hda_ext_core snd_soc_sst_ipc snd_hda_codec_realtek snd_soc_sst_dsp snd_hda_codec_generic nls_iso8859_1 snd_soc_core snd_compress ac97_bus snd_pcm_dmaengine dw_dmac_core snd_hda_intel iwlmvm snd_hda_codec snd_hda_core intel_rapl 8250_dw snd_hwdep mac80211 x86_pkg_temp_thermal intel_powerclamp coretemp snd_pcm kvm_intel kvm snd_seq_midi snd_seq_midi_event irqbypass crct10dif_pclmul crc32_pclmul iwlwifi ghash_clmulni_intel snd_rawmidi aesni_intel snd_seq aes_x86_64 lrw gf128mul glue_helper cfg80211 snd_seq_device ablk_helper cryptd snd_timer snd soundcore idma64
 virt_dma shpchp ir_lirc_codec ir_xmp_decoder lirc_dev ir_mce_kbd_decoder ir_sharp_decoder intel_lpss_pci ir_sanyo_decoder btusb ir_sony_decoder hci_uart btrtl ir_jvc_decoder ir_rc6_decoder btbcm btqca ir_rc5_decoder btintel ir_nec_decoder bluetooth mei_me rc_rc6_mce ite_cir rc_core intel_lpss_acpi intel_lpss mei acpi_pad mac_hid acpi_als kfifo_buf industrialio ip6t_REJECT nf_reject_ipv6 nf_log_ipv6 xt_hl ip6t_rt nf_conntrack_ipv6 nf_defrag_ipv6 ipt_REJECT nf_reject_ipv4 nf_log_ipv4 nf_log_common xt_LOG xt_limit xt_tcpudp xt_addrtype nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack ip6table_filter ip6_tables nf_conntrack_netbios_ns nf_conntrack_broadcast nf_nat_ftp nf_nat nf_conntrack_ftp nf_conntrack iptable_filter ip_tables x_tables parport_pc ppdev sunrpc lp parport autofs4 i915_bpo intel_ips
 i2c_algo_bit drm_kms_helper syscopyarea e1000e sysfillrect sysimgblt fb_sys_fops ptp sdhci_pci ahci drm pps_core sdhci libahci video pinctrl_sunrisepoint i2c_hid pinctrl_intel hid fjes
CPU: 3 PID: 15471 Comm: kworker/3:0 Not tainted 4.4.0-64-generic #85-Ubuntu
Hardware name: /NUC6i5SYB, BIOS SYSKLi35.86A.0051.2016.0804.1114 08/04/2016
Workqueue: events e1000e_systim_overflow_work [e1000e]
task: ffff880031f32d00 ti: ffff8800350e8000 task.ti: ffff8800350e8000
RIP: 0010:[<ffffffff810fa7e3>] [<ffffffff810fa7e3>] timecounter_read+0x13/0x60
RSP: 0018:ffff8800350ebdb0 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffff8800353ab7a0 RCX: 0000000000000001
RDX: 0000000000000001 RSI: ffff8800350ebdf8 RDI: 0000000000000000
RBP: ffff8800350ebdb8 R08: ffff88016ed965c0 R09: 0000000000000000
R10: 000000010035ffff R11: 0000000000000001 R12: ffff8800353ab780
R13: ffff8800350ebdf8 R14: 0000000000000246 R15: ffff8800353ab6d0
FS: 0000000000000000(0000) GS:ffff88016ed80000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000002e0a000 CR4: 00000000003406e0
Stack:
 ffff8800353ab7d0 ffff8800350ebde8 ffffffffc014d36e ffff8800353ab6d0
 ffff88016ed965c0 ffff88016ed9af00 00000000000000c0 ffff8800350ebe18
 ffffffffc014d521 ffffffff81837e26 ffff88016ed9af00 00000000a91221c0
Call Trace:
 [<ffffffffc014d36e>] e1000e_phc_gettime+0x2e/0x60 [e1000e]
 [<ffffffffc014d521>] e1000e_systim_overflow_work+0x31/0xa0 [e1000e]
 [<ffffffff81837e26>] ? __schedule+0x3b6/0xa30
 [<ffffffff8109a515>] process_one_work+0x165/0x480
 [<ffffffff8109a87b>] worker_thread+0x4b/0x4c0
 [<ffffffff8109a830>] ? process_one_work+0x480/0x480
 [<ffffffff8109a830>] ? process_one_work+0x480/0x480
 [<ffffffff810a0ba8>] kthread+0xd8/0xf0
 [<ffffffff810a0ad0>] ? kthread_create_on_node+0x1e0/0x1e0
 [<ffffffff8183c98f>] ret_from_fork+0x3f/0x70
 [<ffffffff810a0ad0>] ? kthread_create_on_node+0x1e0/0x1e0
Code: 00 48 d3 e0 48 83 e8 01 48 89 43 18 5b 41 5c 41 5d 5d c3 0f 1f 44 00 00 0f 1f 44 00 00 55 48 89 e5 53 48 8b 07 48 89 fb 48 89 c7 <ff> 10 48 8b 33 48 89 c2 48 2b 53 08 8b 4e 10 48 23 56 08 48 0f
RIP [<ffffffff810fa7e3>] timecounter_read+0x13/0x60
 RSP <ffff8800350ebdb0>
CR2: 0000000000000000
---[ end trace 7d024538180dff79 ]---
BUG: unable to handle kernel paging request at ffffffffffffffd8
IP: [<ffffffff810a1250>] kthread_data+0x10/0x20
PGD 2e0d067 PUD 2e0f067 PMD 0
Oops: 0000 [#2] SMP
Modules linked in: rfcomm ipt_MASQUERADE nf_nat_masquerade_ipv4 xt_multiport xfrm_user xfrm_algo iptable_nat nf_nat_ipv4 br_netfilter bridge stp llc aufs pl2303 usbserial bnep arc4 snd_hda_codec_hdmi snd_soc_skl snd_soc_skl_ipc snd_hda_ext_core snd_soc_sst_ipc snd_hda_codec_realtek snd_soc_sst_dsp snd_hda_codec_generic nls_iso8859_1 snd_soc_core snd_compress ac97_bus snd_pcm_dmaengine dw_dmac_core snd_hda_intel iwlmvm snd_hda_codec snd_hda_core intel_rapl 8250_dw snd_hwdep mac80211 x86_pkg_temp_thermal intel_powerclamp coretemp snd_pcm kvm_intel kvm snd_seq_midi snd_seq_midi_event irqbypass crct10dif_pclmul crc32_pclmul iwlwifi ghash_clmulni_intel snd_rawmidi aesni_intel snd_seq aes_x86_64 lrw gf128mul glue_helper cfg80211 snd_seq_device ablk_helper cryptd snd_timer snd soundcore idma64
 virt_dma shpchp ir_lirc_codec ir_xmp_decoder lirc_dev ir_mce_kbd_decoder ir_sharp_decoder intel_lpss_pci ir_sanyo_decoder btusb ir_sony_decoder hci_uart btrtl ir_jvc_decoder ir_rc6_decoder btbcm btqca ir_rc5_decoder btintel ir_nec_decoder bluetooth mei_me rc_rc6_mce ite_cir rc_core intel_lpss_acpi intel_lpss mei acpi_pad mac_hid acpi_als kfifo_buf industrialio ip6t_REJECT nf_reject_ipv6 nf_log_ipv6 xt_hl ip6t_rt nf_conntrack_ipv6 nf_defrag_ipv6 ipt_REJECT nf_reject_ipv4 nf_log_ipv4 nf_log_common xt_LOG xt_limit xt_tcpudp xt_addrtype nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack ip6table_filter ip6_tables nf_conntrack_netbios_ns nf_conntrack_broadcast nf_nat_ftp nf_nat nf_conntrack_ftp nf_conntrack iptable_filter ip_tables x_tables parport_pc ppdev sunrpc lp parport autofs4 i915_bpo intel_ips
 i2c_algo_bit drm_kms_helper syscopyarea e1000e sysfillrect sysimgblt fb_sys_fops ptp sdhci_pci ahci drm pps_core sdhci libahci video pinctrl_sunrisepoint i2c_hid pinctrl_intel hid fjes
CPU: 3 PID: 15471 Comm: kworker/3:0 Tainted: G D 4.4.0-64-generic #85-Ubuntu
Hardware name: /NUC6i5SYB, BIOS SYSKLi35.86A.0051.2016.0804.1114 08/04/2016
task: ffff880031f32d00 ti: ffff8800350e8000 task.ti: ffff8800350e8000
RIP: 0010:[<ffffffff810a1250>] [<ffffffff810a1250>] kthread_data+0x10/0x20
RSP: 0018:ffff8800350ebaa8 EFLAGS: 00010002
RAX: 0000000000000000 RBX: 0000000000000003 RCX: ffffffff82109e80
RDX: 0000000000000003 RSI: 0000000000000003 RDI: ffff880031f32d00
RBP: ffff8800350ebaa8 R08: 00000000ffffffff R09: 0000000000000000
R10: ffff880031f32d60 R11: 0000000000005c00 R12: 0000000000000000
R13: 0000000000016dc0 R14: ffff880031f32d00 R15: ffff88016ed96dc0
FS: 0000000000000000(0000) GS:ffff88016ed80000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000028 CR3: 00000001653c0000 CR4: 00000000003406e0
Stack:
 ffff8800350ebac0 ffffffff8109b8b1 ffff88016ed96dc0 ffff8800350ebb10
 ffffffff818380c0 ffff8800350ebb28 ffffffff00000003 ffff880031f32d00
 ffff8800350ec000 ffff880031f333d0 ffff8800350eb6c0 0000000000000046
Call Trace:
 [<ffffffff8109b8b1>] wq_worker_sleeping+0x11/0x90
 [<ffffffff818380c0>] __schedule+0x650/0xa30
 [<ffffffff818384d5>] schedule+0x35/0x80
 [<ffffffff81084425>] do_exit+0x775/0xb00
 [<ffffffff81031c41>] oops_end+0xa1/0xd0
 [<ffffffff8106ad05>] no_context+0x135/0x380
 [<ffffffff8106afd0>] __bad_area_nosemaphore+0x80/0x1f0
 [<ffffffff8106b153>] bad_area_nosemaphore+0x13/0x20
 [<ffffffff8106b417>] __do_page_fault+0xb7/0x400
 [<ffffffffc01ecb7b>] ? __i915_wait_request+0xcb/0x660 [i915_bpo]
 [<ffffffff8106b782>] do_page_fault+0x22/0x30
 [<ffffffff8183e778>] page_fault+0x28/0x30
 [<ffffffff810fa7e3>] ? timecounter_read+0x13/0x60
 [<ffffffffc014d36e>] e1000e_phc_gettime+0x2e/0x60 [e1000e]
 [<ffffffffc014d521>] e1000e_systim_overflow_work+0x31/0xa0 [e1000e]
 [<ffffffff81837e26>] ? __schedule+0x3b6/0xa30
 [<ffffffff8109a515>] process_one_work+0x165/0x480
 [<ffffffff8109a87b>] worker_thread+0x4b/0x4c0
 [<ffffffff8109a830>] ? process_one_work+0x480/0x480
 [<ffffffff8109a830>] ? process_one_work+0x480/0x480
 [<ffffffff810a0ba8>] kthread+0xd8/0xf0
 [<ffffffff810a0ad0>] ? kthread_create_on_node+0x1e0/0x1e0
 [<ffffffff8183c98f>] ret_from_fork+0x3f/0x70
 [<ffffffff810a0ad0>] ? kthread_create_on_node+0x1e0/0x1e0
Code: ff ff ff be 46 02 00 00 48 c7 c7 a0 ac cb 81 e8 c7 01 fe ff e9 a6 fe ff ff 66 90 0f 1f 44 00 00 48 8b 87 18 05 00 00 55 48 89 e5 <48> 8b 40 d8 5d c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00
RIP [<ffffffff810a1250>] kthread_data+0x10/0x20
 RSP <ffff8800350ebaa8>
CR2: ffffffffffffffd8
---[ end trace 7d024538180dff7a ]---
Fixing recursive fault but reboot is needed!