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Cisco Bug: CSCvv35452 - [TMO-CUPS]: SR 689613895 - Function: egtpc_handle_user_sap_event()

Last Modified

Oct 13, 2020

Products (2)

  • Cisco PGW Packet Data Network Gateway
  • Cisco PGW Packet Data Network Gateway

Known Affected Releases

21.18.6.76716 21.18.9 21.21.0

Description (partial)

Symptom:
Assertion failure at egtpc_handle_user_sap_event

 Stack (131071@0x0xffceb000, probably truncated):
    [ffffe430/X] __kernel_vsyscall() sp=0xffceb9d8
    [0ccedcf7/X] sn_assert() sp=0xffceba38
    [0891b1c9/X] egtpc_handle_user_sap_event() sp=0xffcec688
    [060d66fe/X] sgwdrv_get_bearer_info_from_egtpc.isra.146() sp=0xffcec708
    [060d8c71/X] snx_sgw_driver_get_bearer_context.isra.147() sp=0xffced788
    [06232657/X] sgwdrv_request_control_dispatch() sp=0xffceec68
    [062969bb/X] snx_saegwdrv_request_control_dispatch() sp=0xffceee98
    [04390874/X] sessmgr_sgw_get_bearer_ctxt() sp=0xffcef058
    [039adcef/X] sessmgr_process_get_subscriber_session() sp=0xffcf0bb8
    [039b6223/X] sessmgr_handle_get_subscriber_session_summary() sp=0xffd0a778

Conditions:
A scenario where PDN was going down and in Disconnecting state with few responses pending from the peers. At the same time code trying to access transient call data.
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