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Cisco Bug: CSCus17177 - Session-Manager Crash at Function: handle_new_con_for_existing_ms

Last Modified

Jan 24, 2018

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases

17.4.0 18.0.0 19.2.d0 20.0.0 20.0.v0

Description (partial)

Symptom:
A session manager crash is observed with the following stack trace:

Fatal Signal 11: Segmentation fault
  PC: [06d9e1e6/X] handle_new_con_for_existing_ms()
  Faulty address: 0x1ec
  Signal from: kernel
  Signal detail: address not mapped to object
  Process: card=2 cpu=0 arch=X pid=10420 cpu=~4% argv0=sessmgr
  Crash time: 2014-Dec-15+10:49:28 UTC
  Recent errno: 11 Resource temporarily unavailable
  Stack (26568@0xffff7000):
    [06d9e1e6/X] handle_new_con_for_existing_ms() sp=0xffff7d58
    [06d9fada/X] acc_gmm_new_con_ind() sp=0xffff8298
    [07558e8a/X] access_iu_process_update_request_in_initial_ue() sp=0xffff8538
    [0755a512/X] SNUiRptConInd() sp=0xffff8a28
    [0ce559f5/X] RaUiRptConInd() sp=0xffff8a68
    [0ce3d871/X] raLiCnInitUEMsg() sp=0xffff8bc8
    [0ce28760/X] RaLiSptConInd() sp=0xffff8e48
    [0cfb2782/X] SpUiSptConInd() sp=0xffff8e68
    [0cfa4a43/X] spConRequest() sp=0xffff9018
    [0cfa8a02/X] spLiHndlCr() sp=0xffff96d8
    [0cf7ce42/X] SpLiSntUDatInd() sp=0xffff98d8
    [0cf76367/X] cmUnpkSntUDatInd() sp=0xffff9948
    [0cfb1354/X] spActvTsk() sp=0xffff9988
    [08440370/X] skTskHdlr() sp=0xffff9a58
    [08437125/X] SPstTsk() sp=0xffff9b58
    [08449ec5/X] sn_process_pst_req() sp=0xffffa078
    [0844a62b/X] sn_handle_ccpu_bulk_req_msg() sp=0xffffb188
    [0b0e989d/X] sn_msg_arriving_handle() sp=0xffffd288
    [0b0cd632/X] sn_loop_run() sp=0xffffd748
    [0add621d/X] main() sp=0xffffd7b8

Conditions:
Local variable "db_detail" becomes NULL sometimes in handle_new_con_for_existing_ms() .
This variable is not changed expilcitly in code, but it has somehow become NULL.
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