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Cisco Bug: CSCum09380 - Assert egtpc_evt_handler_func.c:9986 egtpc_handle_csfb_resume_notf_evt()

Last Modified

Jan 30, 2017

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases

14.0(43) 16.0(1)

Description (partial)

Symptom:
sessmgr crash with following traces:

    [f7e285a1/X] libc.so.6/kill() sp=0xffff4288
    [0a1d2077/X] sn_assert() sp=0xffff42b8
    [06d8002e/X] egtpc_handle_csfb_resume_notf_evt() sp=0xffff4708
    [06cf7000/X] egtpc_handle_user_sap_event() sp=0xffff4d08
    [070ea3ef/X] mme_app_send_egtp_msg() sp=0xffff4d38
    [071379bd/X] mme_tau_proc_handle_common_processing_for_tau_req() sp=0xffffc488
    [0713aaf5/X] mme_tau_state_awt_sgw_dns_resp() sp=0xffffc6b8
    [070520f9/X] mme_fsm_event_handler() sp=0xffffcb18
    [0713f06a/X] mme_event_handler_tau_procedure() sp=0xffffcb58
    [07053314/X] mme_procedure_handle_event() sp=0xffffcb98
    [07091325/X] mme_disp_handle_emm_evt() sp=0xffffcc78
    [0709a524/X] mme_disp_attached_handle_dns_rsp() sp=0xffffccb8
    [070520f9/X] mme_fsm_event_handler() sp=0xffffd118
    [07063e92/X] mme_app_sgw_dns_rsp_cb() sp=0xffffd198
    [0824419c/X] snaptr_procedure_complete() sp=0xffffd4f8
    [08240486/X] async_return_cbk() sp=0xffffd528
    [04da97d6/X] tlib_serv() sp=0xffffd568
    [04da94f7/X] tlib_tmr_tick() sp=0xffffd598
    [042c671f/X] snx_timer_service() sp=0xffffd5b8
    [042c50bf/X] snx_fast_service() sp=0xffffd5e8
    [05809664/X] sessmgr_snx_tick_callback() sp=0xffffd618
    [0a248126/X] sn_loop_run() sp=0xffffdba8
    [0a06fe54/X] main() sp=0xffffdbe8

Conditions:
Combined attach.
Extented service request/response.
ISDR from HSS.
MME triggers Modify Bearer Command.
No response from SGW.
UE context release with cause, not available for PS services.
MME aborts Modify Bearer Command and suspend the bearers.
On Im Entry complete, MME retries the Modify Beater Command.
No response from SGW.
MME receives a TAU, tries to resume the bearers and crashes
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Bug Details Include

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