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Cisco Bug: CSCuq25059 - Assertion failure at sess/smgr/sessmgr_ggsn.c:25058

Last Modified

Dec 25, 2016

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases

16.0(500)

Description (partial)

Symptom:
Session manager crashes due to an assert failure with the following backtrace.

Assertion failure at sess/smgr/sessmgr_ggsn.c:25058
  Note: Unknown traffic class 7
  Function: sessmgr_ggsn_select_apn()
  Expression: 0
  Code: CRASH
  Proclet: sessmgr (f=87000,i=66)
  Process: card=3 cpu=1 arch=X pid=5993 cpu=~0% argv0=sessmgr
  Crash time: 2014-Jul-28+08:39:44 UTC
  Recent errno: 11 Resource temporarily unavailable
  Stack (105240@0xfffe4000):
    [ffffe430/X] __kernel_vsyscall() sp=0xfffe4b98
    [0abbbd9f/X] sn_assert() sp=0xfffe4bd8
    [05e0d618/X] sessmgr_ggsn_select_apn.isra.29() sp=0xfffe51d8
    [05e19f57/X] sessmgr_ggsn_handle_new_call() sp=0xfffe5b58
    [036edc8d/X] smgr_fsm_state_open() sp=0xffff2218
    [03681518/X] smgr_callline_fsm() sp=0xffff22b8
    [05d82edc/X] sessmgr_app_svr_event_control_dispatch() sp=0xffff2848
    [0460b02b/X] snx_pppdrv_event_control_dispatch() sp=0xffff28d8
    [07d4c05a/X] ggsnapp_event_control_dispatch() sp=0xffff2918
    [07d62592/X] ggsnapp_send_snx_new_call() sp=0xffff3968
    [07daca22/X] ggsnapp_fsm_handle_prim_cpc_req() sp=0xffff3a38
    [07dab339/X] ggsnapp_tun_fsm_handle_prim_cpc_req() sp=0xffff3ee8
    [07db25be/X] ggsnapp_process_prim_cpc_req_msg() sp=0xffff4248
    [07dae2ab/X] ggsnapp_handle_cpc_req() sp=0xffff42a8
    [07dc1bac/X] ggsnapp_process_gtp_request_msg() sp=0xffff46f8
    [07dc277d/X] ggsnapp_recv_msg() sp=0xffff9768
    [040e44c4/X] sessmgr_process_egtpcm_add_session_req() sp=0xffff9838
    [0343df42/X] sessmgr_handle_demux_smgr_req_add_session_variable_size() sp=0xffffb4f8
    [0ac73fc8/X] sn_msg_arriving_handle() sp=0xffffd5e8
    [0ac590f9/X] sn_loop_run() sp=0xffffda98
    [0a9fd66d/X] main() sp=0xffffdb08

Conditions:
This crash occurs when the PGW receives an un-known traffic class in the Create PDP Context Request message and there is a mismatch between the PDP-type in the request message and the PDP-type defined in the configuration for the particular APN. Any traffic class other than 1, 2, 3 or 4 is considered an un-know traffic class.
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