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DB2 - Problem description

Problem IC75181 Status: Closed

DB2DART MAY PRODUCE A HEX DUMP THAT IS LARGER THAN THE PAGESIZE,IF BEGOFF
VALUE IN PAGE HEADER IS CORRUPTED

product:
DB2 FOR LUW / DB2FORLUW / 970 - DB2
Problem description:
If a page header is corrupted,  db2dart may create a hex dump of 
the page that is larger than the page.   This will occur when 
the value in begoff is larger than pagesize. 
 
For example, consider this page header 
 
           000       *A41D 1C91 7B1B 9CD7 5A01 EF73 DBE5 FD52* 
*........Z..s...R* 
           010       *A719 B407 3A9B B6FC 9C97 34CD B129 2EE6* 
*..........4.....* 
           020       *9FF0 97AB BDFB 0149 E65A C8DA BC0B 226B* 
*.......I.Z.....k* 
 
The hexdump of the page is 0xA41D bytes long, exactly the size 
of begoff.    In this case, the pagesize is 8K, so anything 
printed after 0x2000 is bogus. 
 
When searching for patterns in the hex dump to help the customer 
identify root cause of the page overwrite,   any patterns found 
after the pagesize will become a 'false positive' and can 
mislead the investigation
Problem Summary:
**************************************************************** 
* USERS AFFECTED:                                              * 
* ALL                                                          * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* See Problem Description above                                * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Upgrade to DB2 Version 9.7 Fix Pack 5                        * 
****************************************************************
Local Fix:
available fix packs:
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
First fixed in DB2 Version 9.7 Fix Pack 5
Workaround
not known / see Local fix
Timestamps
Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :
22.03.2011
08.12.2011
08.12.2011
Problem solved at the following versions (IBM BugInfos)
9.7.FP5
Problem solved according to the fixlist(s) of the following version(s)
9.7.0.5 FixList