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Cisco Bug: CSCuq86525 - Assertion failure at sess/snx/drivers/sgw/sgw_pdn_fsm_util.c:10623

Last Modified

Dec 25, 2016

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases

16.1.0.55472 16.1.a4 16.2.0.56515

Description (partial)

Symptom:
********************* CRASH #38  in production node***********************
SW Version          : 16.1(56341)
Similar Crash Count : 219
Time of First Crash : 2014-Sep-08+18:34:45
Assertion failure at sess/snx/drivers/sgw/sgw_pdn_fsm_util.c:10623
  Function: sgwdrv_fill_and_send_dbr_li_event()
  Expression: (((epsb) != ((void *)0)) && ((epsb)->magic == (('S'<<24)|('G'<<16)|('E'<<8)|('B'))))
  Proclet: sessmgr (f=87000,i=44)
  Process: card=15 cpu=0 arch=X pid=9141 cpu=~44% argv0=sessmgr
  Crash time: 2014-Sep-08+19:54:32 UTC
  Recent errno: 11 Resource temporarily unavailable
  Stack (131071@0xfffd5000, probably truncated):
    [ffffe430/X] __kernel_vsyscall() sp=0xfffd5f28
    [0abbc00f/X] sn_assert() sp=0xfffd5f68
    [052b4570/X] sgwdrv_fill_and_send_dbr_li_event() sp=0xfffd6018
    [052b52ef/X] sgwdrv_pdn_fsm_st_disconnecting_evt_delete_bearer_cfm() sp=0xfffe2118
    [05269fd0/X] sgwdrv_run_pdn_fsm() sp=0xfffe2588
    [0528a73d/X] sgwdrv_egtpc_event_dispatch() sp=0xfffe31d8
    [077cdc4e/X] egtpc_send_cfm_evt() sp=0xfffe3868
    [077ec884/X] egtpc_handle_delete_bearer_rsp_msg() sp=0xfffe3d48
    [0778b252/X] egtpc_handle_tun_n_mob_mgmt_message() sp=0xfffe3f48

********************* CRASH #01 in lab environment***********************
SW Version          : 16.2(56515)
Similar Crash Count : 1
Time of First Crash : 2014-Sep-08+09:40:29

Assertion failure at sess/snx/drivers/sgw/sgw_pdn_fsm_util.c:10623
  Function: sgwdrv_fill_and_send_dbr_li_event()
  Expression: (((epsb) != ((void *)0)) && ((epsb)->magic == (('S'<<24)|('G'<<16)|('E'<<8)|('B'))))
  Proclet: sessmgr (f=87000,i=32)
  Process: card=2 cpu=0 arch=X pid=6265 cpu=~0% argv0=sessmgr
  Crash time: 2014-Sep-08+16:40:29 UTC
  Recent errno: 11 Resource temporarily unavailable

Conditions:
If we have bearer Mismatch in MME and SGW and if PGW will trigger the Delete bearer request for default bearer for the same PDN having bearer mismatch between MME and SGW, this this crash will occur.
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