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Cisco Bug: CSCvv49749 - RP crashes due to SSS related memory corruptions

Last Modified

Oct 05, 2020

Products (1)

  • Cisco IOS

Known Affected Releases

16.6.7

Description (partial)

Symptom:
++ ASR1k (ISG) running 16.6.7 software version experiences RP switchovers almost everyday at similar time:

ISG-MER#    show redundancy switchover history
Index  Previous  Current  Switchover             Switchover
       active    active   reason                 time
-----  --------  -------  ----------             ----------
   1       48       49    active unit removed    14:26:40 BST Fri Aug 7 2020
   2       49       48    active unit removed    15:18:26 BST Sun Aug 9 2020
   3       48       49    active unit failed     12:34:08 BST Mon Aug 10 2020
   4       49       48    active unit failed     10:16:59 BST Wed Aug 12 2020
   5       48       49    active unit failed     10:26:29 BST Thu Aug 13 2020
   6       49       48    active unit removed    10:09:24 BST Fri Aug 14 2020
   7       48       49    active unit failed     11:00:19 BST Sat Aug 15 2020
   8       49       48    active unit removed    11:14:43 BST Sun Aug 16 2020

++ We can see several different reasons for each crash as below:
07/08/2020: UNIX-EXT-SIGNAL: Aborted(6), Process = Check heaps (chunk name is SSS PM Infotype)
09/08/2020: UNIX-EXT-SIGNAL: Aborted(6), Process = SSS Manager
10/08/2020: UNIX-EXT-SIGNAL: Segmentation fault(11), Process = IOSD ipc task
12/08/2020: UNIX-EXT-SIGNAL: Segmentation fault(11), Process = SSM connection manager
13/08/2020: UNIX-EXT-SIGNAL: Segmentation fault(11), Process = SSS Manager
14/08/2020: UNIX-EXT-SIGNAL: Aborted(6), Process = Check heaps
15/08/2020: UNIX-EXT-SIGNAL: Segmentation fault(11), Process = SSS Feature Manager
16/08/2020: UNIX-EXT-SIGNAL: Aborted(6), Process = Check heaps

++ Moreover, we can see all crashinfo files are flooded bylogg " %IDMGR-3-INVALID_ID: bad id in id_get (Out of IDs!) (id: 0x0)"

Conditions:
AAA SSS configuration
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