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Cisco Bug: CSCvh74990 - sessmgr restart during service request procedure

Last Modified

Jul 09, 2019

Products (2)

  • Cisco ASR 5000 Series
  • Cisco ASR 5500

Known Affected Releases

21.3.11 21.3.13 21.5.5 21.6.4 21.7.3 21.8.0 21.8.ca1 21.9.0

Description (partial)

Session manager restart with following stack trace.

  Function: mme_app_fill_s1_bearer_values()
  Expression: mme_brr->ubc_data.bd_sgw_s1u_teid != 0
  Proclet: sessmgr (f=87000,i=288)
  Process: card=8 cpu=0 arch=X pid=30499 cpu=~0% argv0=sessmgr
  time: 2018-Jan-26+14:25:54 UTC
  Recent errno: 11 Resource temporarily unavailable
  Build_number: 68666
  Stack (34440@0x0xffff5000):
    [ffffe430/X] __kernel_vsyscall() sp=0xffff56e8
    [0c009f94/X] sn_assert() sp=0xffff5728
    [087f8c41/X] mme_app_fill_s1_bearer_values() sp=0xffff5768
    [08937075/X] mme_app_fill_s1_init_ctxt_req() sp=0xffff57b8
    [089f9533/X] mme_im_exit_process_event_after_auth() sp=0xffff6528
    [089f9726/X] mme_im_exit_state_awt_auth_handle_auth_cfm() sp=0xffff6568
    [089b8958/X] mme_fsm_event_handler() sp=0xffff6a18
    [08a00f53/X] mme_event_handler_im_exit_procedure() sp=0xffff6a58
    [08a00f97/X] mme_im_exit_proc_internal_event_handler() sp=0xffff6a78
    [0889b966/X] mme_end_procedure() sp=0xffff6b08
    [0889d433/X] mme_auth_complete() sp=0xffff6db8
    [08a3398c/X] mme_auth_awt_smc_resp_smc_cfm() sp=0xffff6e48
    [089b8958/X] mme_fsm_event_handler() sp=0xffff72f8
    [08a01d3f/X] mme_event_handler_auth_procedure() sp=0xffff7328
    [08812500/X] mme_procedure_handle_event() sp=0xffff73a8
    [08815888/X] mme_delegate_event_to_running_proc() sp=0xffff7408
    [08a12174/X] mme_disp_handle_event() sp=0xffff77c8
    [08a14f40/X] mme_disp_attached_handle_s1nas_msg() sp=0xffff7ac8
    [089b8958/X] mme_fsm_event_handler() sp=0xffff7f78
    [087e98e0/X] nas_access_recv_uplink_tpt.isra.8() sp=0xffff8f18
    [087f2efb/X] nas_access_recv_msg() sp=0xffff8f98
    [087d4c87/X] UzLiSztDatInd() sp=0xffff9068
    [0e737bc7/X] SzUiSztDatInd() sp=0xffff9088
    [0e73ff87/X] szUiSndDatInd() sp=0xffff90f8

service request
auth req
auth response
security comm
security resp

Suspected call flow scenario

service request
auth req
auth response
security comm
security resp
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