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DB2 - Problem description

Problem IC70833 Status: Closed

A MEMORY CORRUPTION WHEN WRITING AN ERROR MESSAGE FOR USEREXIT. THIS CAN
CAUSE DB2 TO CRASH WITH SIGSEGV.

product:
DB2 FOR LUW / DB2FORLUW / 950 - DB2
Problem description:
A memory corruption when writing an error message for userexit. 
This can cause DB2 to crash with SIGSEGV.  This corruption is 
known to happen in the sqlufrol function and may be possible in 
other functions.  An FODC directory will be created in which the 
agent receiving SIGSEGV may have a truncated stack. 
 
An error message like the following may be seen in the 
db2diag.log: 
2010-08-13-17.00.11.162122-420 I1036874E498       LEVEL: Warning 
PID     : 10214                TID  : 1456        PROC : db2sysc 
0 
INSTANCE: db2inst1             NODE : 000         DB   : SAMPLE 
APPHDL  : 0-1466               APPID: 
*LOCAL.db2inst1.100813235706 
AUTHID  : DB2INST1 
EDUID   : 1456                 EDUNAME: db2agent (SAMPLE) 0 
FUNCTION: DB2 UDB, data protection services, sqlufrol, 
probe:8181 
MESSAGE : The rollforward recovery phase completed with a return 
code of 
          -2112880618
Problem Summary:
**************************************************************** 
* USERS AFFECTED:                                              * 
* Customers using LOGARCHMETH=USEREXIT                         * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* A memory corruption when writing an error                    * 
* messageforuserexit.This can cause DB2 to crash with SIGSEGV. * 
* Thiscorruptionmay be possible inother functions.  An         * 
* FODCdirectory will be created in whichtheagent receiving     * 
* SIGSEGVmay have a truncated stack.An error message like      * 
* thefollowing may be seen                                     * 
* inthedb2diag.log:2010-08-13-17.00.11.162122-420              * 
* I1036874E498LEVEL:WarningPID    : 10214                TID   * 
* : 1456PROC :db2sysc0INSTANCE: db2inst1            NODE :     * 
* 000DB  : SAMPLEAPPHDL  :                                     * 
* 0-1466APPID:*LOCAL.db2inst1.100813235706AUTHID  :            * 
* DB2INST1EDUID  :1456                EDUNAME: db2agent        * 
* (SAMPLE) 0FUNCTION:DB2 UDB, data protection                  * 
* services,sqlufrol,probe:8181MESSAGE : The rollforward        * 
* recovery phasecompleted with areturncode of-2112880618       * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Upgrade to DB2 Version 9.5 Fixpack 7.                        * 
****************************************************************
Local Fix:
available fix packs:
DB2 Version 9.5 Fix Pack 7 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 8 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 9 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 10 for Linux, UNIX, and Windows

Solution
First fixed in DB2 Version 9.5 Fixpack 7.
Workaround
not known / see Local fix
BUG-Tracking
forerunner  : APAR is sysrouted TO one or more of the following: IC71796 IC76082 
follow-up : 
Timestamps
Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :
27.08.2010
10.01.2011
31.10.2011
Problem solved at the following versions (IBM BugInfos)
9.5.FP7
Problem solved according to the fixlist(s) of the following version(s)
9.1.0.7 FixList
9.5.0.7 FixList
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