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Cisco Bug: CSCut43453 - Fatal Signal 11: Segmentation fault PC: dh_api_get_sockets_handler()

Last Modified

Dec 25, 2016

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases

18.0.0.59403

Description (partial)

sessmgr crash

Symptom:
Fatal Signal 11: Segmentation fault
  PC: [0b861800/X] dh_api_get_sockets_handler()
  Faulty address: 0xa4e90010
  Signal from: kernel
  Signal detail: address not mapped to object
  Process: card=10 cpu=0 arch=X pid=1470 cpu=~25% argv0=sessmgr
  Crash time: 2015-Mar-13+16:15:52 UTC
  Recent errno: 11 Resource temporarily unavailable
  Stack (10136@0xffffb000):
    [0b861800/X] dh_api_get_sockets_handler() sp=0xffffb148
    [0b1a1eda/X] sn_msg_arriving_handle() sp=0xffffd258
    [0b184e56/X] sn_loop_run() sp=0xffffd718
    [0ae7f12d/X] main() sp=0xffffd788

Conditions:
Sessmgrs are using dhost for ipne connections.

All the seg-fault has happened in sessmgrs, not in diamproxy or connproxy.
The cause of the seg-fault is an invalid slist element which has happened either due to memory corruption/ due to free-ed memory access.
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