"Bug: unable to handle kernel paging request"

[William G]

I've been noticing that a new box which uses a LSI MegaRaid controller has been falling over every several hours.

The console is showing this 'oops', and on the system console it shows as "Bug: unable to handle kernel paging request"

Apr 17 08:31:53 vm6 kernel: [   20.479725] PGD 83a02a067 PUD 839ff1067 PMD 83a020067 PTE 8000000847a0a867
Apr 17 08:31:53 vm6 kernel: [   20.479752] Oops: 0001 [#1] SMP
Apr 17 08:31:53 vm6 kernel: [   20.479766] Modules linked in: xt_nat xt_tcpudp softdog iptable_filter nfsd auth_rpcgss nfs_acl nfs lockd grace fscache sunrpc ib_iser rdma_cm iw_cm ib_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack ip_tables x_tables nfnetlink_log nfnetlink intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm ast ttm ipmi_ssif crct10dif_pclmul crc32_pclmul drm_kms_helper aesni_intel aes_x86_64 drm lrw gf128mul i2c_algo_bit glue_helper snd_pcm ablk_helper cryptd syscopyarea snd_timer snd sysfillrect mxm_wmi sysimgblt soundcore joydev input_leds ipmi_si 8250_fintek mei_me sb_edac mei edac_core pcspkr ioatdma acpi_pad lpc_ich ipmi_msghandler i2c_i801 shpchp wmi mac_hid vhost_net vhost macvtap macvlan autofs4 zfs(PO) zunicode(PO) zcommon(PO) znvpair(PO) spl(O) zavl(PO) hid_generic usbkbd usbmouse usbhid hid ahci ixgbe(O) libahci dca vxlan ip6_udp_tunnel udp_tunnel ptp megaraid_sas pps_core
Apr 17 08:31:53 vm6 kernel: [   20.480189] CPU: 1 PID: 2468 Comm: megasasctl Tainted: P           O    4.2.6-1-pve #1
Apr 17 08:31:53 vm6 kernel: [   20.480213] Hardware name: Supermicro Super Server/X10SDV-4C-TLN2F, BIOS 1.0b 09/09/2015
Apr 17 08:31:53 vm6 kernel: [   20.480236] task: ffff880850548dc0 ti: ffff88083a038000 task.ti: ffff88083a038000
Apr 17 08:31:53 vm6 kernel: [   20.480258] RIP: 0010:[<ffffffffc001dd00>]  [<ffffffffc001dd00>] megasas_mgmt_compat_ioctl+0x100/0x210 [megaraid_sas]
Apr 17 08:31:53 vm6 kernel: [   20.480290] RSP: 0018:ffff88083a03be18  EFLAGS: 00010246
Apr 17 08:31:53 vm6 kernel: [   20.480306] RAX: 0000000000000000 RBX: 00000000ffe8510c RCX: 0000000000000000
Apr 17 08:31:53 vm6 kernel: [   20.480327] RDX: 0000000000000004 RSI: 00000000ffe85118 RDI: 00000000ffe84f3c
Apr 17 08:31:53 vm6 kernel: [   20.480347] RBP: ffff88083a03be58 R08: 00007ffffffff000 R09: 00000000000000c4
Apr 17 08:31:53 vm6 kernel: [   20.480368] R10: 00000000f7702b70 R11: 0000000000000246 R12: 00000000ffe8510c
Apr 17 08:31:53 vm6 kernel: [   20.480388] R13: 00000000ffe84f30 R14: 00000000ffe8510c R15: ffff8808432fc600
Apr 17 08:31:53 vm6 kernel: [   20.480409] FS:  0000000000000000(0000) GS:ffff88087fc40000(0063) knlGS:00000000f7545700
Apr 17 08:31:53 vm6 kernel: [   20.480432] CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
Apr 17 08:31:53 vm6 kernel: [   20.480449] CR2: 00000000ffe84f40 CR3: 000000083b1d2000 CR4: 00000000003406e0
Apr 17 08:31:53 vm6 kernel: [   20.480469] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Apr 17 08:31:53 vm6 kernel: [   20.480489] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Apr 17 08:31:53 vm6 kernel: [   20.480509] Stack:
Apr 17 08:31:53 vm6 kernel: [   20.480516]  ffff880859f7e01c ffff880000000260 ffff880000000204 00000000ffe8510c
Apr 17 08:31:53 vm6 kernel: [   20.480543]  00000000c1144d01 ffff8808432fc600 00000000ffe8510c ffff8808432fc600
Apr 17 08:31:53 vm6 kernel: [   20.480569]  ffff88083a03bf48 ffffffff8125395b 000000000804a000 000000006a382ec0
Apr 17 08:31:53 vm6 kernel: [   20.480595] Call Trace:
Apr 17 08:31:53 vm6 kernel: [   20.480607]  [<ffffffff8125395b>] compat_SyS_ioctl+0xeb/0x1220
Apr 17 08:31:53 vm6 kernel: [   20.480628]  [<ffffffff810675fa>] ? __do_page_fault+0x1ba/0x410
Apr 17 08:31:53 vm6 kernel: [   20.480648]  [<ffffffff8180a762>] sysenter_dispatch+0xf/0x29
Apr 17 08:31:53 vm6 kernel: [   20.480665] Code: 00 e8 55 8e 3b c1 48 85 c0 0f 85 f0 00 00 00 49 8d 74 24 08 49 8d 7d 08 ba 04 00 00 00 e8 39 8e 3b c1 48 85 c0 0f 85 d4 00 00 00 <41> 8b 45 10 85 c0 74 2f 41 8b 45 0c 49 8d 4c 05 14 41 8b 44 24
Apr 17 08:31:53 vm6 kernel: [   20.480825]  RSP <ffff88083a03be18>
Apr 17 08:31:53 vm6 kernel: [   20.480836] CR2: 00000000ffe84f40
Apr 17 08:31:53 vm6 kernel: [   20.481657] ---[ end trace 56f1f58ab4f6d064 ]---

PVE info:

root@vm6:~# pveversion -v
proxmox-ve: 4.1-26 (running kernel: 4.2.6-1-pve)
pve-manager: 4.1-22 (running version: 4.1-22/aca130cf)
pve-kernel-4.2.6-1-pve: 4.2.6-36
lvm2: 2.02.116-pve2
corosync-pve: 2.3.5-2
libqb0: 1.0-1
pve-cluster: 4.0-29
qemu-server: 4.0-64
pve-firmware: 1.1-7
libpve-common-perl: 4.0-54
libpve-access-control: 4.0-13
libpve-storage-perl: 4.0-38
pve-libspice-server1: 0.12.5-2
vncterm: 1.2-1
pve-qemu-kvm: 2.5-9
pve-container: 1.0-52
pve-firewall: 2.0-22
pve-ha-manager: 1.0-25
ksm-control-daemon: 1.2-1
glusterfs-client: 3.5.2-2+deb8u1
lxc-pve: 1.1.5-7
lxcfs: 2.0.0-pve2
cgmanager: 0.39-pve1
criu: 1.6.0-1
zfsutils: 0.6.5-pve7~jessie