Public bug reported:
# symptom
OS hang, able to ping. Must do hard reboot.
# kernel info
Ubuntu 16.04.5 LTS
Kernel: Ubuntut 4.4.0-135.161-generic
# Kernel log
Dec 27 11:42:02 fileserver7 kernel: [8092783.673329] BUG: unable to handle
kernel paging request at ffffffffc08a5550
Dec 27 11:42:02 fileserver7 kernel: [8092783.673365] IP: [<ffffffff811a7f6d>]
__remove_mapping+0x8d/0x190
Dec 27 11:42:02 fileserver7 kernel: [8092783.673394] PGD 1e0f067 PUD 1e11067
PMD 84e42a067 PTE 0
Dec 27 11:42:02 fileserver7 kernel: [8092783.673420] Oops: 0000 [#1] SMP
Dec 27 11:42:02 fileserver7 kernel: [8092783.673436] Modules linked in:
openafs(POE) binfmt_misc ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs skx_edac
edac_core x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm
irqbypass ipmi_ssif joydev input_leds mei_me mei shpchp ioatdma dca ipmi_si
8250_fintek ipmi_msghandler acpi_power_meter acpi_pad mac_hid ib_iser rdma_cm
iw_cm ib_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi
scsi_transport_iscsi autofs4 btrfs raid10 raid0 multipath linear raid456
async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq
libcrc32c ses enclosure scsi_transport_sas raid1 crct10dif_pclmul crc32_pclmul
ghash_clmulni_intel aesni_intel aes_x86_64 lrw hid_generic gf128mul glue_helper
ablk_helper cryptd ast i2c_algo_bit ttm drm_kms_helper i40e syscopyarea
sysfillrect vxlan sysimgblt ip6_udp_tunnel fb_sys_fops udp_tunnel ptp
megaraid_sas nvme usbhid drm pps_core ahci hid libahci wmi fjes [last unloaded:
openafs]
Dec 27 11:42:02 fileserver7 kernel: [8092783.673861] CPU: 5 PID: 187 Comm:
kswapd0 Tainted: P B OE 4.4.0-135-generic #161-Ubuntu
Dec 27 11:42:02 fileserver7 kernel: [8092783.673892] Hardware name: Supermicro
SSG-6029P-E1CR12T/X11DPH-T, BIOS 2.1 06/15/2018
Dec 27 11:42:02 fileserver7 kernel: [8092783.673919] task: ffff881054c85500 ti:
ffff8808518c8000 task.ti: ffff8808518c8000
Dec 27 11:42:02 fileserver7 kernel: [8092783.673945] RIP:
0010:[<ffffffff811a7f6d>] [<ffffffff811a7f6d>] __remove_mapping+0x8d/0x190
Dec 27 11:42:02 fileserver7 kernel: [8092783.673978] RSP: 0018:ffff8808518cba40
EFLAGS: 00010002
Dec 27 11:42:02 fileserver7 kernel: [8092783.673998] RAX: ffffffffc08a5500 RBX:
ffffea00191c1500 RCX: 0000000000000246
Dec 27 11:42:02 fileserver7 kernel: [8092783.674022] RDX: 0000000000000000 RSI:
0000000000000000 RDI: ffff8807f9104d80
Dec 27 11:42:02 fileserver7 kernel: [8092783.674047] RBP: ffff8808518cba78 R08:
0000000000000000 R09: ffff8807f9104d68
Dec 27 11:42:02 fileserver7 kernel: [8092783.674072] R10: ffff8808518cb9f8 R11:
0000000000000000 R12: ffff8807f9104d80
Dec 27 11:42:02 fileserver7 kernel: [8092783.674097] R13: 0000000000000001 R14:
ffff88084e39d800 R15: ffff8807f9104d68
Dec 27 11:42:02 fileserver7 kernel: [8092783.674122] FS:
0000000000000000(0000) GS:ffff88085cb40000(0000) knlGS:0000000000000000
Dec 27 11:42:02 fileserver7 kernel: [8092783.674150] CS: 0010 DS: 0000 ES:
0000 CR0: 0000000080050033
Dec 27 11:42:02 fileserver7 kernel: [8092783.674171] CR2: ffffffffc08a5550 CR3:
0000000844156000 CR4: 0000000000360670
Dec 27 11:42:02 fileserver7 kernel: [8092783.674196] DR0: 0000000000000000 DR1:
0000000000000000 DR2: 0000000000000000
Dec 27 11:42:02 fileserver7 kernel: [8092783.674221] DR3: 0000000000000000 DR6:
00000000fffe0ff0 DR7: 0000000000000400
Dec 27 11:42:02 fileserver7 kernel: [8092783.674246] Stack:
Dec 27 11:42:02 fileserver7 kernel: [8092783.674256] ffffffff811d45f0
0000000000000000 ffff8808518cbe50 ffffea00191c1500
Dec 27 11:42:02 fileserver7 kernel: [8092783.674286] ffff8808518cbc00
ffffea00191c1520 ffff8808518cbb28 ffff8808518cbb78
Dec 27 11:42:02 fileserver7 kernel: [8092783.674317] ffffffff811aaf43
ffff881054c85500 0000000100000001 ffff88087fffbf80
Dec 27 11:42:02 fileserver7 kernel: [8092783.674348] Call Trace:
Dec 27 11:42:02 fileserver7 kernel: [8092783.674363] [<ffffffff811d45f0>] ?
page_get_anon_vma+0x80/0x80
Dec 27 11:42:02 fileserver7 kernel: [8092783.674388] [<ffffffff811aaf43>]
shrink_page_list+0x453/0x7a0
Dec 27 11:42:02 fileserver7 kernel: [8092783.674411] [<ffffffff811ab939>]
shrink_inactive_list+0x209/0x520
Dec 27 11:42:02 fileserver7 kernel: [8092783.674434] [<ffffffff811ac5ce>]
shrink_lruvec+0x58e/0x760
Dec 27 11:42:02 fileserver7 kernel: [8092783.674457] [<ffffffff81850bd1>] ?
__schedule+0x301/0x7f0
Dec 27 11:42:02 fileserver7 kernel: [8092783.674486] [<ffffffff8111bf4c>] ?
css_next_descendant_pre+0x4c/0x60
Dec 27 11:42:02 fileserver7 kernel: [8092783.675452] [<ffffffff8111bf4c>] ?
css_next_descendant_pre+0x4c/0x60
Dec 27 11:42:02 fileserver7 kernel: [8092783.676382] [<ffffffff811ac88f>]
shrink_zone+0xef/0x2e0
Dec 27 11:42:02 fileserver7 kernel: [8092783.677311] [<ffffffff811adafe>]
kswapd+0x51e/0x990
Dec 27 11:42:02 fileserver7 kernel: [8092783.678220] [<ffffffff811ad5e0>] ?
mem_cgroup_shrink_node_zone+0x1c0/0x1c0
Dec 27 11:42:02 fileserver7 kernel: [8092783.679116] [<ffffffff810a4dc7>]
kthread+0xe7/0x100
Dec 27 11:42:02 fileserver7 kernel: [8092783.679992] [<ffffffff81850bd1>] ?
__schedule+0x301/0x7f0
Dec 27 11:42:02 fileserver7 kernel: [8092783.680859] [<ffffffff810a4ce0>] ?
kthread_create_on_node+0x1e0/0x1e0
Dec 27 11:42:02 fileserver7 kernel: [8092783.681715] [<ffffffff81855735>]
ret_from_fork+0x55/0x80
Dec 27 11:42:02 fileserver7 kernel: [8092783.682556] [<ffffffff810a4ce0>] ?
kthread_create_on_node+0x1e0/0x1e0
Dec 27 11:42:02 fileserver7 kernel: [8092783.683390] Code: 53 1c 83 f8 02 0f 85
99 00 00 00 48 8b 03 a8 10 0f 85 87 00 00 00 48 8b 03 f6 c4 80 0f 85 9a 00 00
00 49 8b 47 68 31 f6 45 84 ed <4c> 8b 40 50 74 19 48 8b 03 a9 00 00 04 00 75 0f
49 8b 47 70 a9
Dec 27 11:42:02 fileserver7 kernel: [8092783.685188] RIP [<ffffffff811a7f6d>]
__remove_mapping+0x8d/0x190
Dec 27 11:42:02 fileserver7 kernel: [8092783.686057] RSP <ffff8808518cba40>
Dec 27 11:42:02 fileserver7 kernel: [8092783.686915] CR2: ffffffffc08a5550
Dec 27 11:42:02 fileserver7 kernel: [8092783.690895] ---[ end trace
570a370611a65dbf ]---
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Incomplete
** Tags: xenial
** Attachment added: "lspic-vnvn.log"
https://bugs.launchpad.net/bugs/1809864/+attachment/5225237/+files/lspic-vnvn.log
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https://bugs.launchpad.net/bugs/1809864
Title:
BUG: unable to handle kernel paging request at ffffffffc08a5550
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