Kernel panic in tcp_rearm_rto

Issue

• Kernel panic in tcp_rearm_rto

  PANIC: "BUG: unable to handle kernel NULL pointer dereference at 0000000000000014"
  [exception RIP: tcp_rearm_rto+0xbf]
      RIP: ffffffff930b22cf  RSP: ffff90a8bfbc3950  RFLAGS: 00010293
      RAX: 00000000f7f3c38f  RBX: ffff90a8a0f7be00  RCX: 000000002882c54c
      RDX: 0000000000000000  RSI: ffff9087b1abd700  RDI: ffff90a8a0f7be00
      RBP: ffff90a8bfbc3958   R8: 00000000f7f3c38f   R9: 0000000000000000
      R10: ffffa84f32b6fa80  R11: ffffffffc054f5f8  R12: 000000002882c54c
      R13: ffff9087b1abd700  R14: 0000000000004100  R15: 000000002882c54c
      ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0000
  #10 [ffff90a8bfbc3960] tcp_ack at ffffffff930b274c
  #11 [ffff90a8bfbc3a00] tcp_rcv_established at ffffffff930b3be5
  #12 [ffff90a8bfbc3a50] tcp_v4_do_rcv at ffffffff930becda
  #13 [ffff90a8bfbc3a98] tcp_v4_rcv at ffffffff930c03ec
  #14 [ffff90a8bfbc3b40] ip_local_deliver_finish at ffffffff9309886d
  #15 [ffff90a8bfbc3b68] ip_local_deliver at ffffffff93098b60
  #16 [ffff90a8bfbc3bc8] ip_rcv_finish at ffffffff930984d0
  #17 [ffff90a8bfbc3bf0] ip_rcv at ffffffff93098ea0
  #18 [ffff90a8bfbc3c60] __netif_receive_skb_core at ffffffff9304dbd9
  #19 [ffff90a8bfbc3cd8] __netif_receive_skb at ffffffff9304ded8
  #20 [ffff90a8bfbc3cf8] netif_receive_skb_internal at ffffffff9304df60
  #21 [ffff90a8bfbc3d28] napi_gro_receive at ffffffff9304ebe8
  #22 [ffff90a8bfbc3d50] ixgbe_clean_rx_irq at ffffffffc05889d2 [ixgbe]
  #23 [ffff90a8bfbc3de0] ixgbe_poll at ffffffffc0589b56 [ixgbe]
  #24 [ffff90a8bfbc3e78] net_rx_action at ffffffff9304e57f
  #25 [ffff90a8bfbc3ef8] __do_softirq at ffffffff92aa41e5
  #26 [ffff90a8bfbc3f68] call_softirq at ffffffff9318f42c
  #27 [ffff90a8bfbc3f80] do_softirq at ffffffff92a2f675
  #28 [ffff90a8bfbc3fa0] irq_exit at ffffffff92aa4565
  #29 [ffff90a8bfbc3fb8] do_IRQ at ffffffff93190716
  --- <IRQ stack> ---