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Cisco Bug: CSCus31854 - Assert Failure: mme_app_clear_egtpc_peer_mme_sgsn_ue_resources()

Last Modified

Dec 24, 2016

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases

17.2.0.58852 18.0.0.58405 18.0.0.58848 18.0.0.58853

Description (partial)

Function: mme_app_clear_egtpc_peer_mme_sgsn_ue_resources()

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

Assertion failure at sess/mme/mme-app/app/mme_app_egtpc.c:6759
  Function: mme_app_clear_egtpc_peer_mme_sgsn_ue_resources()
  Expression: status != SN_STATUS_FAILURE
  Proclet: sessmgr (f=87000,i=8)
  Process: card=4 cpu=1 arch=X pid=7840 cpu=~23% argv0=sessmgr
  Crash time: 2014-Dec-24+04:02:06 UTC
  Recent errno: 11 Resource temporarily unavailable
  Stack (72456@0xfffec000):
    [ffffe430/X] __kernel_vsyscall() sp=0xfffecaf8
    [0b031c0f/X] sn_assert() sp=0xfffecb38
    [07fc5f2f/X] mme_app_clear_egtpc_peer_mme_sgsn_ue_resources() sp=0xfffed2e8
    [07fc622d/X] mme_app_destroy_ue_peer_mme_sgsn_ctxt() sp=0xfffed328
    [07fc6750/X] mme_s1ho_4g_to_gen_procedure_clear() sp=0xfffed358
    [07fd1704/X] mme_end_procedure() sp=0xfffed3e8
    [07fd2b32/X] mme_s1ho_4g_to_gen_proc_complete() sp=0xfffed498
    [07fd2f73/X] mme_s1ho_4gto_aiftr_handle_fwd_tnl_resp() sp=0xfffedf48
    [08062ba2/X] mme_fsm_event_handler() sp=0xfffee3f8
    [080912a3/X] mme_event_handler_s1ho_4g_to_gen_procedure() sp=0xfffee438
    [07f61150/X] mme_procedure_handle_event() sp=0xfffee4b8
    [08094b41/X] mme_disp_handle_emm_evt() sp=0xfffee5b8
    [08098c26/X] mme_disp_attached_handle_s11_msg() sp=0xfffee698
    [08062ba2/X] mme_fsm_event_handler() sp=0xfffeeb48
    [080ae81b/X] mme_app_handle_events_from_egtpc_app() sp=0xffffbaa8
    [07ad354c/X] egtpc_send_cfm_evt() sp=0xffffc6d8
    [07ad8d02/X] egtpc_handle_no_peer_rsp_rcved() sp=0xffffcd78
    [07b6150d/X] egtpc_tun_retransmit_tmr_cb() sp=0xffffd4a8
    [05351754/X] tlib_serv() sp=0xffffd4f8
    [05351394/X] tlib_tmr_tick() sp=0xffffd548
    [048b9982/X] snx_timer_service() sp=0xffffd558
    [048b788f/X] snx_fast_service() sp=0xffffd588
    [05fa5b9a/X] sessmgr_snx_tick_callback() sp=0xffffd5c8
    [0b0d36da/X] sn_loop_run() sp=0xffffda88

Conditions:
At times, after starting the systest call-models, sitt instances  (2G and 3G calls) were killed by pkill sitt. Then, after a few minutes the system crashes along with few other Assertion failure with different backtraces in function egtpc_handle_user_sap_event()
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