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Cisco Bug: CSCup61287 - Segmentation Fault at PC: [0abb41a7/X] sn_memblock_memcache_free

Last Modified

Dec 24, 2016

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases

16.1.0.55597 17.0.0.56687 17.2.0.58522 18.0.0.58381

Description (partial)

Symptom:
An MME Manager crash was observed with the following backtrace:

Fatal Signal 6: Aborted
  PC: [0abb41a7/X] sn_memblock_memcache_free()
  Signal from: sitmain pid=4568 uid=0
  Process: card=2 cpu=0 arch=X pid=6859 cpu=~99% argv0=mmemgr
  Crash time: 2014-Jun-26+18:46:54 UTC
  Recent errno: 11 Resource temporarily unavailable
  Stack (6936@0xffffc000):
    [0abb41a7/X] sn_memblock_memcache_free() sp=0xffffcd08
    [0abb4615/X] sn_memblock_cache_free_new() sp=0xffffcd78
    [07ffd512/X] SN_cmFree() sp=0xffffd1c8
    [0800d02b/X] SFree() sp=0xffffd208
    [07ff6bff/X] SPutDBuf() sp=0xffffd268
    [07ff80f5/X] SPutMsg() sp=0xffffd2b8
    [0c9850b1/X] sbDbDelAll() sp=0xffffd338
    [0c9a5cc8/X] sbAsAbortAssoc() sp=0xffffd3f8
    [0c9bb540/X] sbAsFreezeTO() sp=0xffffd428
    [0c97233b/X] sbTmrEvnt() sp=0xffffd498
    [0c5e3585/X] cmPrcTmr() sp=0xffffd4d8

[ingress]Parthi# show task resources facility mmemgr all
                   task   cputime        memory     files      sessions
 cpu facility      inst used allc   used  alloc used allc  used  allc S status
----------------------- --------- ------------- --------- ------------- ------
 7/0 mmemgr           3  14%  95%  2.01G 400.0M  191 1000   123   24k -   over
 7/1 mmemgr           2  23%  95% 255.0M 400.0M  237 1000    89   24k -   good
 7/1 mmemgr           4 7.0%  95% 250.9M 400.0M  259 1000    98   24k -   good
 7/1 mmemgr           6  14%  95%  1.89G 400.0M  277 1000   186   24k -   over
 7/1 mmemgr           5  21%  95%  1.93G 400.0M  265 1000   220   24k -   over
 7/1 mmemgr           1  16%  95%  1.95G 400.0M  218 1000   176   24k -   over
Total                 6 98.02%     8.27G        1447        892

Conditions:
The crash is seen in the CLI - "statistics collection-mode tai" is executed while SBC transactions are actively being forwarded to many eNBs.
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