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Cisco Bug: CSCvu30036 - Segmentation fault due to sessmgr restart for downlink packets

Last Modified

Oct 08, 2020

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases

21.21.0 21.9.9.71866

Description (partial)

Symptom:
Sessmgr restart with following signature:

<div style="font-family:monospace;border-radius: 4px;padding: 6px;">Fatal Signal 11: Segmentation fault
  PC: [03a03a70/X] sessmgr_nsh_get_info_frm_ctxt_hdrs_tlv_format()
  Faulty address: 0x20
  Signal from: kernel
  Signal detail: address not mapped to object
  Process: card=14 cpu=0 arch=X pid=14723 cpu=~23% argv0=sessmgr
  Crsh time: 2020-May-06+00:48:59 UTC
  Recent errno: 11 Resource temporarily unavailable
  Build_number: 71866
  Stack (5560@0x0xffd2b000):
    [03a03a70/X] sessmgr_nsh_get_info_frm_ctxt_hdrs_tlv_format() sp=0xffd2b558
    [03a040a5/X] sessmgr_nsh_process_downlink_pkt() sp=0xffd2b5e8
    [0658de7a/X] sessmgr_med_ipv4_data_received() sp=0xffd2ba18
    [06586bf7/X] sessmgr_med_data_receive() sp=0xffd2c038
    [0c869d94/X] sn_epoll_run_events() sp=0xffd2c088
    [0c87688a/X] sn_loop_run() sp=0xffd2c538
    [0c55e065/X] main() sp=0xffd2c5a8</div>

Conditions:
This crash is happening many times in the network.
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