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Check Point 21000 series appliance with SAM card might crash due to removal of Layer 2 header by SAM card
Symptoms
  • Check Point 21000 series appliance with SAM card crashes.

  • vmcore dump file (sk44186) contains the following stack:

    [adpmod]bpm_if_rx_msg_splimp+... (...)
    [adpmod]gxpci_adp_rx_msg+... (...)
    netif_receive_skb_do+... (...)
    [adpmod]adpif_rx_pkt+... (...)
    [adpmod]mbe_bp_input+... (...)
    [adpmod]mbe_input+... (...)
    netif_receive_skb_do+... (...)
    [ixgbe]ixgbe_poll+... (...)
    [ixgbe]__kc_adapter_clean+... (...)
    net_rx_action+...
    __do_softirq+...
    call_softirq+...
    do_softirq+...
    do_IRQ+... (...)
    
  • vmcore dump file (sk44186) contains the following dmesg messages:

    • adp_hether_rxpkt:ethX-NN len:1478 pt:2 proto:0x...(0x81) dp:0x...
    • adp_hether_rxpkt:ethX-NN len:538 pt:2 proto:0x...(0x81) dp:0x...
Cause

Multiple fragment packets forwarding to Host from SAM card.

Layer 2 header removed by the SAM card caused Host kernel driver misbehavior.


Solution
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