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Cisco Bug: CSCuo29082 - Assertion failure at sess/smgr/sessmgr_sef.c:2578

Last Modified

Dec 25, 2016

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases


Description (partial)

below assert is observed. in this sceanrio smgr clp is freed and acs trying to send the messsage on this freed clp.

********************* CRASH #03 ***********************
SW Version          : 15.0(53496)

Assertion failure at sess/smgr/sessmgr_sef.c:2578
  Function: sessmgr_sef_usr_dispatch_cb()
  Expression: (((clp)!=((void *)0))&&((clp)->callline_magic == (0x77)))
  Proclet: sessmgr (f=87000,i=49)
  Process: card=13 cpu=0 arch=X pid=5404 cpu=~27% argv0=sessmgr
  Crash time: 2014-Apr-08+18:22:10 UTC
  Recent errno: 11 Resource temporarily unavailable
  Stack (56248@0xffff0000):
    [f7e285a1/X] sp=0xffff0268
    [0aa52423/X] sn_assert() sp=0xffff0298
    [03688f17/X] sessmgr_sef_usr_dispatch_cb() sp=0xffff02e8
    [07ca336f/X] acsmgr_do_sessmgr_dispatch() sp=0xffff0308
    [07c24e1a/X] Acsmgr_UChkptVar_Open() sp=0xffffd098
    [07c512e8/X] acsmgr_Uchkpt_acs_dcca_info() sp=0xffffd0d8
    [07c25d01/X] acsmgr_clp_send_checkpoint() sp=0xffffd0f8
    [07f4bb23/X] acsmgr_generate_egcdr_custom6() sp=0xffffd428
    [07f41c69/X] acsmgr_generate_gcdr() sp=0xffffd468
    [07e7d750/X] acsmgr_periodic_process_interim_gcdr_queue() sp=0xffffd4b8
    [07e817f2/X] acsmgr_check_50_msec_timer() sp=0xffffd4e8
    [051e8eda/X] tlib_serv() sp=0xffffd528
    [051e8bfb/X] tlib_tmr_tick() sp=0xffffd558
    [046c9a3f/X] snx_timer_service() sp=0xffffd578
    [046c83df/X] snx_fast_service() sp=0xffffd5a8
    [05ca3f84/X] sessmgr_snx_tick_callback() sp=0xffffd5d8
    [0aae2236/X] sn_loop_run() sp=0xffffdb68
    [0a8cbee4/X] main() sp=0xffffdba8

during L2tp IPCP negotiation phase, when ip allocation takes longer time because of delay in network or delay from LNS/LAC then there is possibility that response to the conf req message conf ack is send twice by LNS
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