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Cisco Bug: CSCut12980 - [Fatal Signal 6: Aborted] __kernel_vsyscall() in egtpc_send_ind_evt()

Last Modified

Feb 05, 2017

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases

17.2.0.58937 17.2.0.59184 18.0.0.59261 18.0.0.59306 18.0.0.59318

Description (partial)

Symptom:
Unexpected session manager reload due to processing Delete Bearer Request while pending Bearer Resource Command exists (more details under Conditions).

Related stack trace:
  [ffffe430/X] __kernel_vsyscall() sp=0xfffe3128
  [07b9f380/X] egtpc_send_ind_evt() sp=0xfffe3d58
  [07c1c47b/X] egtpc_handle_delete_bearer_req_msg() sp=0xfffe3f68
  [07b72ef2/X] egtpc_handle_tun_n_mob_mgmt_message() sp=0xfffe4208
  [07bd99be/X] egtpc_handle_gtp_message() sp=0xffffcc18
  [03f9b481/X] sessmgr_egtp_handle_gtpc_message() sp=0xffffd418
  [0633c740/X] sessmgr_med_data_receive() sp=0xffffd598

Conditions:
Seen while running under high load conditions.

The following event sequence leads to sessmgr reload:
1) UE in idle state and page UE configured for PGW initiated procedures
2) Bearer Resource Command for bearer creation
3) PGW initiated Create Bearer Request
  - Paging initiated for UE but bearer not established
4) PGW triggered Delete Bearer Request
5) Sessmgr reload due to bearer in Bearer Resource Command pending state
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
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