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Cisco Bug: CSCum43590 - sessmgr Fatal Signal 11: Segmentation fault mme_disp_handle_emm_evt()

Last Modified

Dec 25, 2016

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases

14.0(43)

Description (partial)

Symptom:
Build: 14.0(52055)

Fatal Signal 11: Segmentation fault
  PC: [07091307/X] mme_disp_handle_emm_evt()
  Faulty address: 0x10
  Signal from: kernel
  Signal detail: address not mapped to object
  Process: card=10 cpu=0 arch=X pid=6040 cpu=~2% argv0=sessmgr
  Crash time: 2014-Jan-07+00:14:06 UTC
  Recent errno: 11 Resource temporarily unavailable
  Stack (15352@0xffffa000):
    [07091307/X] mme_disp_handle_emm_evt() sp=0xffffa7a8
    [07099f91/X] mme_disp_attached_handle_smgr_event() sp=0xffffa838
    [070520f9/X] mme_fsm_event_handler() sp=0xffffac98
    [070e95bd/X] mme_app_handle_drop_call() sp=0xffffad18
    [0703369b/X] snx_mme_app_driver_request_control_dispatch() sp=0xffffad48
    [0581f544/X] sessmgr_snx_send_drop_call() sp=0xffffb2d8
    [034980e0/X] smgr_fsm_state_line_connected() sp=0xffffd488
    [03494332/X] smgr_callline_fsm() sp=0xffffd4c8
    [032ccdea/X] sessmgr_session_setup_timeout() 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 where MBR is delayed,
Sgs paging Req from MSC,
TAU Req from UE, MME rejects TAU and deletes the session. UE goes to deregistered state.
RAU triggered in deregistered state here causes the above crash.
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