I am having similar kernel message in a HP XW9400 workstation. I have no machine freezes and until now I can still use the machine.
[159882.429604] ------------[ cut here ]------------ [159882.429623] WARNING: CPU: 6 PID: 22042 at /build/linux-0XAgc4/linux-4.4.0/mm/rmap.c:231 unlink_anon_vmas+0x1da/0x1f0() [159882.429625] Modules linked in: veth ip6t_MASQUERADE nf_nat_masquerade_ipv6 ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack ip6table_filter ip6_tables xt_CHECKSUM iptable_mangle xt_comment xt_tcpudp bridge stp llc iptable_filter ip_tables x_tables unix_diag tcp_diag inet_diag nvram video msr binfmt_misc input_leds snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device hp_wmi nvidia_uvm(POE) sparse_keymap snd_timer snd amd64_edac_mod kvm_amd edac_mce_amd edac_core kvm wmi shpchp soundcore 8250_fintek i2c_nforce2 k10temp serio_raw irqbypass mac_hid [159882.429674] ppdev lp parport autofs4 btrfs xor raid6_pq hid_generic usbhid hid nvidia_drm(POE) nvidia_modeset(POE) nvidia(POE) drm_kms_helper syscopyarea sysfillrect mptsas sysimgblt mptscsih fb_sys_fops mptbase drm psmouse pata_acpi scsi_transport_sas firewire_ohci firewire_core forcedeth crc_itu_t sata_nv pata_amd fjes [last unloaded: cpuid] [159882.429700] CPU: 6 PID: 22042 Comm: git-svn Tainted: P OE 4.4.0-78-generic #99-Ubuntu [159882.429703] Hardware name: Hewlett-Packard HP xw9400 Workstation/0A1Ch, BIOS 786D6 v04.02 04/21/2009 [159882.429706] 0000000000000286 00000000acc8e888 ffff88076ca03ba8 ffffffff813f8dd3 [159882.429709] 0000000000000000 ffffffff81cd3a70 ffff88076ca03be0 ffffffff81081302 [159882.429711] ffff88069e8c3300 ffff880042755d70 ffff8800cb21ee78 ffff8800cb21ee88 [159882.429714] Call Trace: [159882.429723] [<ffffffff813f8dd3>] dump_stack+0x63/0x90 [159882.429728] [<ffffffff81081302>] warn_slowpath_common+0x82/0xc0 [159882.429731] [<ffffffff8108144a>] warn_slowpath_null+0x1a/0x20 [159882.429734] [<ffffffff811cdc7a>] unlink_anon_vmas+0x1da/0x1f0 [159882.429739] [<ffffffff811bf411>] free_pgtables+0xa1/0x120 [159882.429742] [<ffffffff811ca011>] exit_mmap+0xc1/0x170 [159882.429745] [<ffffffff8107e0d7>] mmput+0x57/0x130 [159882.429750] [<ffffffff81216284>] flush_old_exec+0x614/0x8d0 [159882.429755] [<ffffffff8126a969>] load_elf_binary+0x359/0x1170 [159882.429762] [<ffffffffc01ec064>] ? load_misc_binary+0x64/0x3f0 [binfmt_misc] [159882.429765] [<ffffffff81271417>] ? get_acl+0x17/0x60 [159882.429769] [<ffffffff8121558e>] search_binary_handler+0x9e/0x1d0 [159882.429772] [<ffffffff81216d24>] do_execveat_common.isra.33+0x554/0x740 [159882.429775] [<ffffffff8121716a>] SyS_execve+0x3a/0x50 [159882.429780] [<ffffffff81840cd5>] stub_execve+0x5/0x5 [159882.429783] [<ffffffff81840a32>] ? entry_SYSCALL_64_fastpath+0x16/0x71 [159882.429786] ---[ end trace e9e562cba7ac90a1 ]--- [159882.714222] ------------[ cut here ]------------ [159882.714234] kernel BUG at /build/linux-0XAgc4/linux-4.4.0/mm/rmap.c:411! [159882.714238] invalid opcode: 0000 [#2] SMP [159882.714242] Modules linked in: veth ip6t_MASQUERADE nf_nat_masquerade_ipv6 ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack ip6table_filter ip6_tables xt_CHECKSUM iptable_mangle xt_comment xt_tcpudp bridge stp llc iptable_filter ip_tables x_tables unix_diag tcp_diag inet_diag nvram video msr binfmt_misc input_leds snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device hp_wmi nvidia_uvm(POE) sparse_keymap snd_timer snd amd64_edac_mod kvm_amd edac_mce_amd edac_core kvm wmi shpchp soundcore 8250_fintek i2c_nforce2 k10temp serio_raw irqbypass mac_hid [159882.714300] ppdev lp parport autofs4 btrfs xor raid6_pq hid_generic usbhid hid nvidia_drm(POE) nvidia_modeset(POE) nvidia(POE) drm_kms_helper syscopyarea sysfillrect mptsas sysimgblt mptscsih fb_sys_fops mptbase drm psmouse pata_acpi scsi_transport_sas firewire_ohci firewire_core forcedeth crc_itu_t sata_nv pata_amd fjes [last unloaded: cpuid] [159882.714331] CPU: 6 PID: 22150 Comm: git-filter-bran Tainted: P D W OE 4.4.0-78-generic #99-Ubuntu [159882.714335] Hardware name: Hewlett-Packard HP xw9400 Workstation/0A1Ch, BIOS 786D6 v04.02 04/21/2009 [159882.714339] task: ffff8807b0a91980 ti: ffff88002bd74000 task.ti: ffff88002bd74000 [159882.714342] RIP: 0010:[<ffffffff811cdc1f>] [<ffffffff811cdc1f>] unlink_anon_vmas+0x17f/0x1f0 [159882.714354] RSP: 0018:ffff88002bd77d50 EFLAGS: 00010202 [159882.714357] RAX: ffff880714e0d590 RBX: ffff880714e0d580 RCX: 0000000000000001 [159882.714359] RDX: ffffffff00000001 RSI: 000000000001a080 RDI: ffff8808092cecd0 [159882.714362] RBP: ffff88002bd77d88 R08: 0000000000000001 R09: 000000018040003f [159882.714365] R10: 0000000000000000 R11: ffff880714e0d7a0 R12: ffff88068a626f40 [159882.714367] R13: ffff88068a626f40 R14: ffff88068a626f50 R15: ffff8806839d8320 [159882.714371] FS: 00007fbf26a08700(0000) GS:ffff88080f380000(0000) knlGS:0000000000000000 [159882.714374] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [159882.714376] CR2: 0000559f3a019a10 CR3: 00000000a4a4b000 CR4: 00000000000006e0 [159882.714379] Stack: [159882.714381] ffffffff811c6332 ffff88068a626ed8 ffff88068a6264b0 0000559f38cf9000 [159882.714385] 0000000000000000 ffff88002bd77de0 ffff88068a626ed8 ffff88002bd77dc8 [159882.714389] ffffffff811bf411 0000000000000000 0000000000000000 ffff880771d1e400 [159882.714393] Call Trace: [159882.714401] [<ffffffff811c6332>] ? __remove_shared_vm_struct+0x32/0x40 [159882.714428] [<ffffffff811bf411>] free_pgtables+0xa1/0x120 [159882.714432] [<ffffffff811ca011>] exit_mmap+0xc1/0x170 [159882.714445] [<ffffffff8107e0d7>] mmput+0x57/0x130 [159882.714450] [<ffffffff81083f5a>] do_exit+0x27a/0xb00 [159882.714454] [<ffffffff81084863>] do_group_exit+0x43/0xb0 [159882.714459] [<ffffffff810848e4>] SyS_exit_group+0x14/0x20 [159882.714466] [<ffffffff81840a32>] entry_SYSCALL_64_fastpath+0x16/0x71 [159882.714469] Code: 48 89 43 18 e8 23 07 02 00 49 8b 44 24 10 49 8d 54 24 10 48 83 e8 10 49 39 d6 74 2f 49 8b 7c 24 08 4c 89 e3 8b 57 34 85 d2 74 9b <0f> 0b e8 ba fd ff ff eb 9b 48 8b 45 d0 45 31 e4 48 8b 80 88 00 [159882.714506] RIP [<ffffffff811cdc1f>] unlink_anon_vmas+0x17f/0x1f0 [159882.714511] RSP <ffff88002bd77d50> [159882.714613] ---[ end trace e9e562cba7ac90a3 ]--- [159882.714617] Fixing recursive fault but reboot is needed! -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1570484 Title: Resuming from suspend on Lenovo ThinkPad X1 Carbon 4th gen does not work reliably Status in linux package in Ubuntu: Confirmed Bug description: Sometimes resuming results in a black screen and a blinking caps lock light, and powering off is the only option. Sometimes it does resume. After such an event I found this in dmesg: [66603.698393] BUG: unable to handle kernel NULL pointer dereference at (null) [66603.698537] IP: [<ffffffff811cb762>] unlink_anon_vmas+0x92/0x1f0 [66603.698649] PGD 0 [66603.698689] Oops: 0000 [#1] SMP [66603.698752] Modules linked in: ctr ccm rfcomm bnep binfmt_misc drbg ansi_cprng dm_crypt arc4 intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm acer_wmi sparse_keymap irqbypass snd_soc_skl crct10dif_pclmul snd_soc_skl_ipc snd_hda_ext_core snd_soc_sst_ipc snd_soc_sst_dsp snd_hda_codec_hdmi snd_soc_core crc32_pclmul snd_hda_codec_conexant iwlmvm snd_hda_codec_generic snd_compress mac80211 aesni_intel ac97_bus snd_pcm_dmaengine aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd dw_dmac_core iwlwifi snd_hda_intel snd_hda_codec uvcvideo videobuf2_vmalloc snd_hda_core videobuf2_memops videobuf2_v4l2 snd_hwdep videobuf2_core cdc_mbim v4l2_common input_leds joydev cdc_wdm qcserial serio_raw usb_wwan cdc_ncm videodev snd_pcm usbnet usbserial mii cfg80211 rtsx_pci_ms btusb media btrtl [66603.700162] btbcm btintel memstick thinkpad_acpi bluetooth nvram snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq mei_me mei snd_seq_device shpchp snd_timer snd soundcore mac_hid parport_pc ppdev lp parport autofs4 rtsx_pci_sdmmc i915_bpo intel_ips i2c_algo_bit e1000e psmouse drm_kms_helper ptp syscopyarea sysfillrect pps_core sysimgblt fb_sys_fops rtsx_pci drm ahci libahci wmi video fjes [66603.700853] CPU: 3 PID: 26940 Comm: systemd-udevd Not tainted 4.4.0-18-generic #34-Ubuntu [66603.700981] Hardware name: LENOVO 20FB003PMS/20FB003PMS, BIOS N1FET37W (1.11 ) 03/15/2016 [66603.701114] task: ffff88010e908ec0 ti: ffff88010fad0000 task.ti: ffff88010fad0000 [66603.701219] RIP: 0010:[<ffffffff811cb762>] [<ffffffff811cb762>] unlink_anon_vmas+0x92/0x1f0 [66603.701365] RSP: 0018:ffff88010fad3d58 EFLAGS: 00010246 [66603.701447] RAX: ffff880213cb0010 RBX: ffff880213cb0000 RCX: 0000000000000000 [66603.701559] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88010fadc000 [66603.701663] RBP: ffff88010fad3d90 R08: 0000000000000000 R09: 000000018040003e [66603.701777] R10: ffff8801f2220840 R11: ffff88010fad6f30 R12: 00007f827a65a000 [66603.701885] R13: fffffffffffffff0 R14: ffff88010fadc078 R15: 0000000000000000 [66603.701994] FS: 0000000000000000(0000) GS:ffff8802224c0000(0000) knlGS:0000000000000000 [66603.702104] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [66603.702187] CR2: 0000000000000000 CR3: 000000010fb68000 CR4: 00000000003406e0 [66603.702294] Stack: [66603.702331] ffffffff811c3fe2 ffff88010fadc000 ffff88010fadc0c8 00007f827a65a000 [66603.702467] 0000000000000000 ffff88010fad3de8 ffff88010fadc000 ffff88010fad3dd0 [66603.702596] ffffffff811bd191 0000000000000000 0000000000000000 ffff88010c11c740 [66603.702730] Call Trace: [66603.702777] [<ffffffff811c3fe2>] ? __remove_shared_vm_struct+0x32/0x40 [66603.702892] [<ffffffff811bd191>] free_pgtables+0xa1/0x120 [66603.703012] [<ffffffff811c7c51>] exit_mmap+0xc1/0x170 [66603.703090] [<ffffffff8107de07>] mmput+0x57/0x130 [66603.703165] [<ffffffff81083b3d>] do_exit+0x27d/0xae0 [66603.703248] [<ffffffff81084423>] do_group_exit+0x43/0xb0 [66603.703341] [<ffffffff810844a4>] SyS_exit_group+0x14/0x20 [66603.703427] [<ffffffff818243b2>] entry_SYSCALL_64_fastpath+0x16/0x71 [66603.703524] Code: 00 00 ad de 48 89 43 18 e8 2c 07 02 00 49 8b 45 10 49 8d 4d 10 4c 89 eb 4c 89 e2 48 83 e8 10 49 39 ce 74 43 49 89 c5 4c 8b 7b 08 <4d> 8b 27 49 39 d4 74 13 48 85 d2 0f 85 0b 01 00 00 49 8d 7c 24 [66603.704080] RIP [<ffffffff811cb762>] unlink_anon_vmas+0x92/0x1f0 [66603.704180] RSP <ffff88010fad3d58> [66603.704229] CR2: 0000000000000000 [66603.735771] ---[ end trace 4454f1c4b387baf0 ]--- [66603.735774] Fixing recursive fault but reboot is needed! Another thing that caught my eye were the following lines but they may be a separate issue: [66598.121484] thinkpad_acpi: unknown possible thermal alarm or keyboard event received [66598.121488] thinkpad_acpi: unhandled HKEY event 0x60c0 [66598.121489] thinkpad_acpi: please report the conditions when this event happened to ibm-acpi-de...@lists.sourceforge.net [66598.122040] i915_bpo 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus alignment [66598.135264] thinkpad_acpi: unknown possible thermal alarm or keyboard event received [66598.135267] thinkpad_acpi: unhandled HKEY event 0x60f0 [66598.135268] thinkpad_acpi: please report the conditions when this event happened to ibm-acpi-de...@lists.sourceforge.net ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-18-generic 4.4.0-18.34 [modified: boot/vmlinuz-4.4.0-18-generic] ProcVersionSignature: Ubuntu 4.4.0-18.34-generic 4.4.6 Uname: Linux 4.4.0-18-generic x86_64 ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: mkortela 1891 F.... pulseaudio CurrentDesktop: Unity Date: Thu Apr 14 19:44:26 2016 EcryptfsInUse: Yes HibernationDevice: RESUME=UUID=b5d97bd1-6a16-4736-9da1-65ed058e7e2b InstallationDate: Installed on 2016-04-13 (0 days ago) InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Beta amd64 (20160412) MachineType: LENOVO 20FB003PMS ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-18-generic root=/dev/mapper/rootvg-ubuntulv ro splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.4.0-18-generic N/A linux-backports-modules-4.4.0-18-generic N/A linux-firmware 1.157 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 03/15/2016 dmi.bios.vendor: LENOVO dmi.bios.version: N1FET37W (1.11 ) dmi.board.asset.tag: Not Available dmi.board.name: 20FB003PMS dmi.board.vendor: LENOVO dmi.board.version: SDK0J40705 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrN1FET37W(1.11):bd03/15/2016:svnLENOVO:pn20FB003PMS:pvrThinkPadX1Carbon4th:rvnLENOVO:rn20FB003PMS:rvrSDK0J40705WIN:cvnLENOVO:ct10:cvrNone: dmi.product.name: 20FB003PMS dmi.product.version: ThinkPad X1 Carbon 4th dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1570484/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp