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Cisco Bug: CSCvt37365 - Fatal Signal 6: Aborted pgw_drv_handle_events_from_smgr() snx_pgw_driver_request_control_dispatch()

Last Modified

Sep 17, 2020

Products (2)

  • Cisco ASR 5000 Series
  • Cisco ASR 5500

Known Affected Releases

21.15.28 21.15.28.74825 21.15.43.76659 21.18.6 21.18.6.76363 21.18.6.76674 21.18.7

Description (partial)

Symptom:
Session Manager reload

Conditions:
1. Session report request with Bearer inactivity received from UP->CP for dedicated bearer (ebi = 8)
    
    2. DBReq is sent out for dedicated bearer (ebi = 8)
    
    3. DBRsp is received for dedicated bearer (ebi = 8). Bearer context at EGTPC and PGW Driver is cleaned up.
    
    4. Sx Modify Req corresponding to DBRsp is sent out and Sx modify Rsp is pending
    
    5. Sx modify response is delayed, hence the corresponding DBRsp trans info is cleaned up due the trans info cleanup timer.
    
    6. Modify Bearer Req comes in and while sending the MBRsp the dedicated bearer (ebi = 8) is also included as Delete Bearer trans info corresponding to that ebi is not found.
    
    7. Hence leading to crash at PGW driver as bearer context is already cleaned up at PGW driver.
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