|
Problem IC74031
|
Status: Closed |
REUSING OF DB2HISTORYDATA STRUCTURE FOR REPEATED DB2HISTORYGETENTRY API CALLS MIGHT PRODUCE UNEXPECTED RESULTS |
| product: |
DB2 FOR LUW / DB2FORLUW / 970 - DB2 |
| Problem description: |
db2HistoryGetEntry has a field pioHistData which takes in a
struct of db2HistoryData type. If an application reuses the
same db2HistoryData type for consecutive calls to
db2HistoryGetEntry, then the API might produce wrong results, or
even trap.
The problem has to do with a field inside the db2HistoryData
called poEventSQLCA. If this field is unset, then internally
the db2HistoryGetEntry API will set it up with a dummy for the
API to process. At the end of the API it will free the memory
of the dummy but not nullify the pointer on the structure. This
causes problem to subsequent calls to db2HistoryGetEntry with
the same instance of db2HistoryData struct as the pointer is
non-NULL and the API tries to dereference it.
This problem only happens when using a v97 client to talk to a
server in v97 or above. |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* user of db2HistoryGetEntry API *
****************************************************************
* PROBLEM DESCRIPTION: *
* See error description *
****************************************************************
* RECOMMENDATION: *
* memset the db2HistoryData struct before passing it to *
* db2HistoryGetEntry. *
**************************************************************** |
| Local Fix: |
The fix is to memset the db2HistoryData struct every time before
calling db2HistoryGetEntry. |
| available fix packs: |
DB2 Version 9.7 Fix Pack 4 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 5 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 6 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 7 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 8 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 9 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 9a for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 10 for Linux, UNIX, and Windows
|
| Solution |
Fix in v97 fp 4 |
| Workaround |
not known / see Local fix |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 21.01.2011
28.04.2011
28.04.2011 |
| Problem solved at the following versions (IBM BugInfos) |
9.7.FP4
|
| Problem solved according to the fixlist(s) of the following version(s) |
| 9.7.0.4
|
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