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Cisco Bug: CSCun18346 - sessmgr Fatal Signal 11: Segmentation fault mme_app_send_s1_msg()

Last Modified

Jan 30, 2017

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases

14.0(1) 15.0(1) 15.0(17)

Description (partial)

Symptom:
Fatal Signal 11: Segmentation fault
  PC: [0770f0e4/X] mme_app_send_s1_msg()
  Faulty address: 0x1421
  Signal from: kernel
  Signal detail: address not mapped to object
  Process: card=6 cpu=0 arch=X pid=7744 cpu=~11% argv0=sessmgr
  Crash time: 2014-Feb-13+06:14:32 UTC
  Recent errno: 11 Resource temporarily unavailable
  Stack (31672@0xffff6000):
    [0770f0e4/X] mme_app_send_s1_msg() sp=0xffff6af8
    [07716827/X] mme_send_s1_ho_prep_failure() sp=0xffff7578
    [077c916f/X] mme_abort_s1_ho_procedure() sp=0xffff7a08
    [0770036e/X] mme_abort_procedure() sp=0xffff7a48
    [07740d5a/X] mme_disp_handle_emm_evt() sp=0xffff7b28
    [0774707c/X] mme_disp_attached_handle_s1nas_msg() sp=0xffff7bb8
    [076ff6d9/X] mme_fsm_event_handler() sp=0xffff8018
    [076fa693/X] s1_access_recv_msg() sp=0xffff8c28
    [076e671e/X] UzLiSztDatInd() sp=0xffff90d8
    [0c6bfb5f/X] SzUiSztDatInd() sp=0xffff90f8
    [0c6c6776/X] szUiSndDatInd() sp=0xffff9128
    [0c6c0e32/X] szSmRcvEstStMsg() sp=0xffff9198
    [0c6c166a/X] szSmExcMt() sp=0xffff91c8
    [0c6aeed3/X] szLiCOMsgHandler() sp=0xffff9248
    [0c6aea41/X] szLiRcvFromLower() sp=0xffff9438
    [0c6b12d6/X] SzLiSctDatInd() sp=0xffff9598
    [0679f78e/X] sn_ccpu_s1ap_handle_data_ind() sp=0xffff9628
    [0426dfc6/X] sessmgr_mmemgr_data_ind() sp=0xffff9688
    [0426de26/X] sessmgr_handle_mmemgr_req_bulk_data_ind() sp=0xffffaf28
    [0ab041bb/X] sn_msg_arriving_handle() sp=0xffffd5d8
    [0aae1bc5/X] sn_loop_run() sp=0xffffdb68
    [0a8cbee4/X] main() sp=0xffffdba8

Conditions:
15.0(53496) build
SGSN/MME combo
The crash scenario involves back-to-back intra-MME S1 Handovers, with the second handover being attempted before the first one is complete.
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