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DB2 - Problem description

Problem IT00666 Status: Closed

POSSIBLE MEMORY CORRUPTION DUE TO A DOUBLE FREE DURING DISCONNECT

product:
DB2 CONNECT / DB2CONNCT / 970 - DB2
Problem description:
If you have a CLI application, you may see an error related to a 
possible memory corruption due to a double free in your 
db2diag.log during the disconnect. 
 
The message should look like the following : 
 
  2014-01-17-15.41.23.130000+120 I612956H924        LEVEL: 
Severe 
  PID     : 2844                 TID  : 1280        PROC : 
dllhost.exe 
  INSTANCE: DB2                  NODE : 000 
 
  EDUID   : 1280 
 
  FUNCTION: DB2 UDB, SQO Memory Management, 
sqloDiagnoseFreeBlockFailure, 
  probe:10 
 
  MESSAGE : Possible memory corruption detected. 
 
  DATA #1 : ZRC, PD_TYPE_ZRC, 4 bytes 
 
  0x820F0002 
 
  DATA #2 : Corrupt block address, PD_TYPE_CORRUPT_BLK_PTR, 4 
bytes 
  0x0637d540 
 
  DATA #3 : Block header, PD_TYPE_BLK_HEADER, 24 bytes 
 
  0x0637D528 : 7063 B0FA 0000 0000 0000 0000 2000 0000 
pc.......... ... 
  0x0637D538 : 7063 B0FA 064C 454E 
pc...LEN 
  DATA #4 : Data header, PD_TYPE_BLK_DATA_HEAD, 48 bytes 
 
  0x0637D540 : 0800 0000 0000 0000 E8AF 2CDB 0801 0000 
..........,..... 
  0x0637D550 : 3548 B14A 5809 6400 7063 B0FA 533B 5155 
5H.JX.d.pc..S;QU 
  0x0637D560 : 0000 0000 0000 0000 0000 0000 0000 0000 
................ 
 
 
  2014-01-17-15.41.23.130000+120 I613882H318        LEVEL: 
Severe 
  PID     : 2844                 TID  : 1280        PROC : 
dllhost.exe 
  INSTANCE: DB2                  NODE : 000 
 
  EDUID   : 1280 
 
  FUNCTION: DB2 UDB, SQO Memory Management, 
sqloDiagnoseFreeBlockFailure, 
  probe:30 
 
  DATA #1 : String, 12 bytes 
 
  Double free.
Problem Summary:
**************************************************************** 
* USERS AFFECTED:                                              * 
* CLI applications                                             * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* See Error Description                                        * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Upgrade to DB2 9.7 FP10 or later                             * 
****************************************************************
Local Fix:


Solution


The problem was first fixed in DB2 9.7 FP10


Workaround


not known / see Local fix


Timestamps


Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :

28.03.2014
01.12.2014
01.12.2014


Problem solved at the following versions (IBM BugInfos)


9.7.FP10



Problem solved according to the fixlist(s) of the following version(s)


9.7.0.10

FixList