Comment 7 for bug 1570484

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!