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Cisco Bug: CSCvh83313 - IFTASK restarts due to a memory access fault

Last Modified

Feb 19, 2019

Products (2)

  • Cisco ASR 5000 Series
  • Cisco ASR 5500

Known Affected Releases

21.6.1.68727 21.6.7 21.7.0 21.9.0

Description (partial)

Symptom:
IFTASK task restarts to recover from a memory fault, with the following stack trace

Saturday February 03 02:27:03 IST 2018
********************* Restart  #06 ***********************
SW Version          : 21.6.1
Similar Restart Count : 21
Time of First Restart : 2018-Feb-02+12:52:15

Fatal Signal 11: Segmentation fault
  Faulty address: (nil)
  Signal from: kernel
  Process: card=5 cpu=0 arch=X pid=6534 argv0=iftask
  Restart time: 2698-Aug-08+04:14:42 UTC
  Build_number:
  Local Backtrace:
-->     [iftask(iftask_sigusr1_signal_handler+0x31c) [0x4875bc]]
        [/lib64/libpthread.so.0(+0xfb50) [0x7fb7e52e1b50]]
        [iftask(generic_rx_func+0x30b) [0x493dcb]]
        [iftask() [0x499699]]
        [iftask(eal_thread_loop+0x198) [0x590318]]
        [/lib64/libpthread.so.0(+0x7f9b) [0x7fb7e52d9f9b]]
        [/lib64/libc.so.6(clone+0x6d) [0x7fb7e5012b9d]]

Conditions:
New card migrations along with Kernel Restart and BFD down.

15  Shutdown      N/A         6    8  2018-Feb-03+02:38:23.119    0.845 sec  Success

F0D8
Sat Feb 03 02:40:27 2018 Internal trap notification 140 (CardSPOFClear) card 10 type 4-Port Service Function Virtual Card UUID 9A28ACC0-09C0-4A58-96A0-79F650F506EE
Sat Feb 03 02:40:27 2018 Internal trap notification 140 (CardSPOFClear) card 11 type 4-Port Service Function Virtual Card UUID 22022C69-DB2D-40F4-9F1D-F01561EB15B1
Sat Feb 03 02:40:27 2018 Internal trap notification 140 (CardSPOFClear) card 12 type 4-Port Service Function Virtual Card UUID 34D85179-6F98-40E2-B52F-6BFF0AAFDCC5
Sat Feb 03 02:40:27 2018 Internal trap notification 1276 (BFDSessionUp)  vpn sgictx OurAddr fd00:abcd:abcd:108::13 NeighborAddr fd00:abcd:abcd:108::1 Session(73/1090519164), Diagnostic code 0 PhyPortId 0
Sat Feb 03 02:40:27 2018 Internal trap notification 1276 (BFDSessionUp)  vpn lictx OurAddr 192.168.113.13 NeighborAddr 192.168.113.1 Session(25/1090519124), Diagnostic code 0 PhyPortId 0
Sat Feb 03 02:40:27 2018 Internal trap notification 1276 (BFDSessionUp)  vpn sgictx OurAddr 192.168.107.13 NeighborAddr 1
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