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Cisco Bug: CSCvv46434 - sessmgr restart at libp2p-2.51.1246.so/ipoque_int_search_bittorrent_tcp_zero()

Last Modified

Oct 01, 2020

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases

21.14.12.74011 21.14.20.75857

Description (partial)

Symptom:
Sessmgr restart at libp2p-2.51.1246.so/ipoque_int_search_bittorrent_tcp_zero()

Segmentation fault /ipoque_int_search_bittorrent_tcp_zero()

  Stack (18744@0x0xffdbb000):
    [f2beb34d/X] libp2p-2.51.1246.so/ipoque_int_search_bittorrent_tcp_zero() sp=0xffdbbbc8
    [f2bed11b/X] libp2p-2.51.1246.so/ipoque_search_bittorrent() sp=0xffdbbd18
    [f2b44e94/X] libp2p-2.51.1246.so/ipoque_detection_process_packet_slowpath() sp=0xffdbbea8
    [f2b47deb/X] libp2p-2.51.1246.so/ipoque_detection_process_packet() sp=0xffdbbee8
    [f2ce6789/X] libp2p-2.51.1246.so/plugin_p2p_api_inspect.isra.72() sp=0xffdbbf58
    [09cde78a/X] acs_p2p_pkt_inspection() sp=0xffdbc098
    [09b63d4b/X] acsmgr_process_p2p_post_tcp_dpi() sp=0xffdbc108
    [09bd4d52/X] acsmgr_process_tcp_packet() sp=0xffdbc678
    [09bdbe00/X] acs_process_tcp_packet_normal_path() sp=0xffdbc6c8
    [09bdbf9f/X] acs_tcp_analyzer() sp=0xffdbc748
    [09b19574/X] do_acsmgr_process_packet() sp=0xffdbc848
    [09b2a51e/X] acs_ip_lean_path() sp=0xffdbc8c8
    [09a17020/X] acsmgr_data_receive_merge_mode() sp=0xffdbcdd8
    [09a1b176/X] acs_handle_datapath_events_from_sm_interface() sp=0xffdbce08
    [039baecd/X] sessmgr_sef_initiate_data_packet_ind() sp=0xffdbcfa8
    [039bb051/X] sessmgr_pcc_intf_send_data_packet_ind() sp=0xffdbd048
    [0676d931/X] sessmgr_pcc_fwd_packet() sp=0xffdbd0a8
    [06804f24/X] sessmgr_handle_ipv6_packets_from_user_pgw_ggsn() sp=0xffdbda88
    [045e1608/X] sessmgr_pgw_handle_inbound_data_packet() sp=0xffdbdb68

Conditions:
Failure to decode the client SSL Hello message during bittorent detection.
This is ok. But we still tried to check the server name and this caused the restart.
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