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  1. Jan 18 19:08:34 rbtech1 kernel: [8416914.737961] BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
  2. Jan 18 19:08:34 rbtech1 kernel: [8416914.738426] IP: [<ffffffff810ca909>] down_read_trylock+0x9/0x30
  3. Jan 18 19:08:34 rbtech1 kernel: [8416914.749820] PGD 1fea558067 PUD 1fe9c34067 PMD 0
  4. Jan 18 19:08:34 rbtech1 kernel: [8416914.761217] Oops: 0000 [#1] SMP
  5. Jan 18 19:08:34 rbtech1 kernel: [8416914.772402] Modules linked in: tcp_diag inet_diag binfmt_misc xt_tcpudp nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ip6table_filter ip6_tables iptable_filter ip_tables x_tables joydev $
  6. nput_leds x86_pkg_temp_thermal ipmi_ssif intel_powerclamp coretemp kvm_intel kvm irqbypass mei_me mei sb_edac serio_raw lpc_ich edac_core ioatdma shpchp ipmi_si ipmi_msghandler 8250_fintek mac_hid ib_iser rdma_cm iw_cm ib_cm ib_sa ib_ma$
  7. ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 btrfs raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear ixgbe crct10dif_pclmul crc$
  8. 2_pclmul ghash_clmulni_intel hid_generic aesni_intel aes_x86_64 lrw gf128mul glue_helper igb ablk_helper vxlan cryptd ip6_udp_tunnel udp_tunnel dca ptp psmouse ahci isci mdio libsas libahci pps_core megaraid_sas scsi_transport_sas i2c_a$
  9. go_bit wmi fjes usbhid hid
  10. Jan 18 19:08:34 rbtech1 kernel: [8416914.911173] CPU: 11 PID: 20860 Comm: mysqld Not tainted 4.4.0-97-generic #120-Ubuntu
  11. Jan 18 19:08:34 rbtech1 kernel: [8416914.933933] Hardware name: Supermicro X9DRW-3LN4F+/X9DRW-3TF+/X9DRW-3LN4F+/X9DRW-3TF+, BIOS 3.0a 02/06/2014
  12. Jan 18 19:08:34 rbtech1 kernel: [8416914.957634] task: ffff881e2ca3d400 ti: ffff88172bf1c000 task.ti: ffff88172bf1c000
  13. Jan 18 19:08:34 rbtech1 kernel: [8416914.980449] RIP: 0010:[<ffffffff810ca909>] [<ffffffff810ca909>] down_read_trylock+0x9/0x30
  14. Jan 18 19:08:34 rbtech1 kernel: [8416915.003395] RSP: 0000:ffff88172bf1f760 EFLAGS: 00010202
  15. Jan 18 19:08:34 rbtech1 kernel: [8416915.014989] RAX: 0000000000000000 RBX: ffff8837d40ec4b1 RCX: ffff88172bf1f8b8
  16. Jan 18 19:08:34 rbtech1 kernel: [8416915.037256] RDX: dead0000000000ff RSI: ffff88172bf1f810 RDI: 0000000000000008
  17. Jan 18 19:08:34 rbtech1 kernel: [8416915.060503] RBP: ffff88172bf1f760 R08: 000000000001a890 R09: 0000000000000000
  18. Jan 18 19:08:34 rbtech1 kernel: [8416915.083342] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8837d40ec4b0
  19. Jan 18 19:08:34 rbtech1 kernel: [8416915.106678] R13: ffffea0011718000 R14: 0000000000000008 R15: ffffea0011718000
  20. Jan 18 19:08:34 rbtech1 kernel: [8416915.130179] FS: 00007ef9f6707700(0000) GS:ffff881fffac0000(0000) knlGS:0000000000000000
  21. Jan 18 19:08:34 rbtech1 kernel: [8416915.153378] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  22. Jan 18 19:08:34 rbtech1 kernel: [8416915.165563] CR2: 0000000000000008 CR3: 0000001ff0720000 CR4: 00000000001406e0
  23. Jan 18 19:08:34 rbtech1 kernel: [8416915.189455] Stack:
  24. Jan 18 19:08:34 rbtech1 kernel: [8416915.200890] ffff88172bf1f790 ffffffff811ce576 ffff8837d40ec4b1 ffff88172bf1f810
  25. Jan 18 19:08:34 rbtech1 kernel: [8416915.226354] ffffea0011718000 0000000000000000 ffff88172bf1f7e8 ffffffff811ce912 Jan 18 19:08:34 rbtech1 kernel: [8416915.248656] ffff88172bf1f8b8 0000000000000014 0000000000000000 ffff881e2ca3d400
  26. Jan 18 19:08:34 rbtech1 kernel: [8416915.271186] Call Trace:
  27. Jan 18 19:08:34 rbtech1 kernel: [8416915.282093] [<ffffffff811ce576>] page_lock_anon_vma_read+0x46/0x100
  28. Jan 18 19:08:34 rbtech1 kernel: [8416915.292949] [<ffffffff811ce912>] rmap_walk+0x162/0x300
  29. Jan 18 19:08:34 rbtech1 kernel: [8416915.303831] [<ffffffff811ceb66>] page_referenced+0xb6/0x140
  30. Jan 18 19:08:34 rbtech1 kernel: [8416915.314622] [<ffffffff811cd370>] ? __page_check_address+0x1d0/0x1d0
  31. Jan 18 19:08:34 rbtech1 kernel: [8416915.325242] [<ffffffff811ce530>] ? page_get_anon_vma+0x80/0x80
  32. Jan 18 19:08:34 rbtech1 kernel: [8416915.335393] [<ffffffff811a64d0>] shrink_active_list+0x210/0x3f0
  33. Jan 18 19:08:34 rbtech1 kernel: [8416915.345557] [<ffffffff811a6d13>] shrink_lruvec+0x663/0x740
  34. Jan 18 19:08:34 rbtech1 kernel: [8416915.355637] [<ffffffff8111713c>] ? css_next_descendant_pre+0x4c/0x60
  35. Jan 18 19:08:34 rbtech1 kernel: [8416915.365555] [<ffffffff8111713c>] ? css_next_descendant_pre+0x4c/0x60
  36. Jan 18 19:08:34 rbtech1 kernel: [8416915.375004] [<ffffffff811a6edf>] shrink_zone+0xef/0x2e0
  37. Jan 18 19:08:34 rbtech1 kernel: [8416915.384171] [<ffffffff811a722b>] do_try_to_free_pages+0x15b/0x3b0
  38. Jan 18 19:08:34 rbtech1 kernel: [8416915.393139] [<ffffffff811a754e>] try_to_free_pages+0xce/0x180
  39. Jan 18 19:08:34 rbtech1 kernel: [8416915.402236] [<ffffffff81198c9c>] __alloc_pages_slowpath.constprop.88+0x35c/0xad0
  40. Jan 18 19:08:34 rbtech1 kernel: [8416915.419607] [<ffffffff81199696>] __alloc_pages_nodemask+0x286/0x2a0
  41. Jan 18 19:08:34 rbtech1 kernel: [8416915.428578] [<ffffffff811e4adf>] alloc_pages_vma+0x1ef/0x250
  42. Jan 18 19:08:34 rbtech1 kernel: [8416915.437079] [<ffffffff811fb03f>] do_huge_pmd_anonymous_page+0x13f/0x580
  43. Jan 18 19:08:34 rbtech1 kernel: [8416915.445635] [<ffffffff811c2a04>] handle_mm_fault+0x15d4/0x1820
  44. Jan 18 19:08:34 rbtech1 kernel: [8416915.454206] [<ffffffff811c7dcf>] ? __split_vma.isra.33+0x1cf/0x1f0
  45. Jan 18 19:08:34 rbtech1 kernel: [8416915.462912] [<ffffffff811cb624>] ? mprotect_fixup+0x154/0x240
  46. Jan 18 19:08:34 rbtech1 kernel: [8416915.471154] [<ffffffff8106b577>] __do_page_fault+0x197/0x400
  47. Jan 18 19:08:34 rbtech1 kernel: [8416915.481299] [<ffffffff8106b802>] do_page_fault+0x22/0x30
  48. Jan 18 19:08:34 rbtech1 kernel: [8416915.490998] [<ffffffff81845978>] page_fault+0x28/0x30
  49. Jan 18 19:08:34 rbtech1 kernel: [8416915.500887] Code: c3 48 89 df 48 89 75 e8 e8 f5 70 77 00 48 8b 75 e8 41 89 c4 eb d7 66 2e 0f 1f 84 00 00 00 00 00 66 90 0f 1f 44 00 00 55 48 89 e5 <48> 8b 07 48 89 c2 48 83 c2 01 7e 07 f0 48 0f b1 17$
  50. 5 f0 48 f7
  51. Jan 18 19:08:34 rbtech1 kernel: [8416915.529687] RIP [<ffffffff810ca909>] down_read_trylock+0x9/0x30
  52. Jan 18 19:08:34 rbtech1 kernel: [8416915.538704] RSP <ffff88172bf1f760>
  53. Jan 18 19:08:34 rbtech1 kernel: [8416915.547827] CR2: 0000000000000008
  54. Jan 18 19:08:34 rbtech1 kernel: [8416915.571113] ---[ end trace fcf5768ea030fbf2 ]---
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