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Cisco Bug: CSCur00777 - Invalid counters shown in "show blocks" output in INUSE and HIGH columns

Last Modified

Feb 20, 2018

Products (1)

  • Cisco ASA 5500-X Series Firewalls

Known Affected Releases

8.2(5.46) 8.4(5.4)

Description (partial)

Symptom:
ASA failover pair in multi-context mode.  Several contexts show invalid block counters under "show blocks" command output in INUSE and HIGH columns, apparently equal to total system memory.  However, all blocks show as part of "freelist" location when using "show blocks pool" command.

Example:

------------------ show memory ------------------

Free memory:      2726510160 bytes (63%)
Used memory:      1568457135 bytes (37%)
-------------     ----------------
Total memory:     4294967295 bytes (100%)

sh blocks
  SIZE    MAX    LOW    CNT  INUSE   HIGH
     0   2700   2642   2700      0      7
     4    100     99     99      0      0
    80   1000    937   1000      0      6
   256   5172   4527   5172 4294967179 4294967295

sh blocks pool 256
Class 3, size 256
     Block   allocd_by    freed_by  data size    alloccnt     dup_cnt  oper location
0x26799a40  0x088054dc  0x085a9186          0     9093055  4294967295  free freelist
0x267995c0  0x088054dc  0x085a9176          0     9754913  4294967295  free freelist
0x26799140  0x0841b012  0x085a90eb          0     1700625  4294967295  free freelist
0x26798cc0  0x088054dc  0x085a9186          0    14583988  4294967295  free freelist
0x26798840  0x0878d87d  0x085582d2          0      917896  4294967295  free freelist
0x267983c0  0x0878d87d  0x085582d2          0      850582  4294967295  free freelist
0x26797f40  0x0878d87d  0x085582d2          0     2082630  4294967295  free freelist
0x26797ac0  0x088054dc  0x085a90eb          0    10289362  4294967295  free freelist
0x26797640  0x0841b012  0x085a9166          0    14712150  4294967295  free freelist
0x267971c0  0x0878d87d  0x085582d2          0     2076088  4294967295  free freelist
0x26796d40  0x0878d87d  0x085582d2          0    13593221  4294967295  free freelist
...etc.

Conditions:
ASA failover pair in multi-context mode.
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