|
Problem IC65681
|
Status: Closed |
DB2 INSTANCE CRASHED DUE TO DOUBLE FREEING A MEMORY BLOCK IN THE SHARED APPLICATION CONTROL HEAP |
| product: |
DB2 FOR LUW / DB2FORLUW / 950 - DB2 |
| Problem description: |
Due to overflow of an internal field with 16bit size, DB2 might
be attempting to double free a memory block during cleanup of
dynamic SQL workspace in the shared application control heap.
This would cause the instance crash and following memory
corruption messages would be reported in the db2diag.log. There
might be more than one agent reporting the memory corruption on
the same memory block around the same time.
2009-12-07-22.52.51.907977+540 I18915964A1892 LEVEL: Severe
PID : 1355976 TID : 5147 PROC : db2sysc
0
INSTANCE: db2inst1 NODE : 000 DB : DB1
APPHDL : 0-25675 APPID: 127.0.0.1.45365.1512140106
AUTHID : db2inst1
EDUID : 5147 EDUNAME: db2agent (DB1) 0
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, 8
bytes
0x0700000026644040
DATA #3 : Block header, PD_TYPE_BLK_HEADER, 24 bytes
0x0700000026644028 : FAB0 7000 0002 6640 4152 9011 027D 482C
..p...f@AR...}H,
0x0700000026644038 : FAB0 7000 0002 6640
..p...f@
DATA #4 : Data header, PD_TYPE_BLK_DATA_HEAD, 48 bytes
0x0700000026644040 : 0000 0000 0000 0000 0224 0000 0000 0000
.........$......
0x0700000026644050 : 0700 0000 1001 1CA0 0700 0000 223B B940
............";.@
0x0700000026644060 : 0000 0000 0000 0000 0000 3A18 00AC 0000
..........:.....
CALLSTCK:
[0] 0x0900000004263D18 pdLog + 0x88
[1] 0x0900000004753A00
@78@sqloDiagnoseFreeBlockFailure__FP8SMemFBlk + 0xE8
[2] 0x090000000475384C
sqloDiagnoseFreeBlockFailure__FP8SMemFBlk@glue687 + 0x74
[3] 0x09000000040295D4 sqlofmblkEx + 0x458
[4] 0x090000000471D28C
sqlra_sqlW_mem_free_sibling_list__FP8sqlrr_cbP23sqlra_workspace_
siblingPUl
+ 0x870
[5] 0x09000000047261B0
sqlra_sqlW_mem_freespace__FP8sqlrr_cbUlPUli + 0x420
[6] 0x0900000004725CC4
sqlra_sqlW_mem_freespace__FP8sqlrr_cbUlPUli@glueFF3 + 0x74
[7] 0x0900000005E31704
sqlra_sqlW_check_for_cleanup__FP8sqlrr_cbUlP7OSSTick + 0x60
[8] 0x0900000004724614
sqlra_sqlW_get_dynamic_section__FP8sqlrr_cbP16sqlra_cached_var +
0x1188
[9] 0x09000000067C9E6C
sqlra_load_var__FP8sqlrr_cbP16sqlra_cached_var + 0x468 |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* Users executing a dynamic SQL causing cleanup of dynamic *
* SQLworkspace in the shared application control heap *
* andoverflow of an internal field with 16bit size. *
****************************************************************
* PROBLEM DESCRIPTION: *
* Due to overflow of an internal field with 16bit size, *
* DB2mightbe attempting to double free a memory block during *
* cleanupofdynamic SQL workspace in the shared application *
* controlheap.This would cause the instance crash and *
* following memorycorruption messages would be reported in the *
* db2diag.log.Theremight be more than one agent reporting the *
* memory corruptiononthe same memory block around the same *
* time.2009-12-07-22.52.51.907977+540 I18915964A1892 *
* LEVEL:SeverePID : 1355976 TID : 5147 *
* PROC :db2sysc0INSTANCE: db2inst1 NODE : 000 *
* DB : DB1APPHDL : 0-25675 *
* APPID:127.0.0.1.45365.1512140106AUTHID : db2inst1EDUID : *
* 5147 EDUNAME: db2agent (DB1) 0FUNCTION: DB2 *
* UDB, SQO Memory Management,sqloDiagnoseFreeBlockFailure, *
* probe:10MESSAGE : Possible memory corruption detected.DATA *
* #1 : ZRC, PD_TYPE_ZRC, 4 bytes0x820F0002DATA #2 : Corrupt *
* block address, PD_TYPE_CORRUPT_BLK_PTR, *
* 8bytes0x0700000026644040DATA #3 : Block header, *
* PD_TYPE_BLK_HEADER, 24 bytes0x0700000026644028 : FAB0 7000 *
* 0002 6640 4152 9011 027D *
* 482C..p...f@AR...}H,0x0700000026644038 : FAB0 7000 0002 *
* 6640..p...f@DATA #4 : Data header, PD_TYPE_BLK_DATA_HEAD, 48 *
* bytes0x0700000026644040 : 0000 0000 0000 0000 0224 0000 0000 *
* 0000.........$......0x0700000026644050 : 0700 0000 1001 1CA0 *
* 0700 0000 223B B940............";.@0x0700000026644060 : 0000 *
* 0000 0000 0000 0000 3A18 00AC *
* 0000..........:.....CALLSTCK:[0] 0x0900000004263D18 pdLog + *
* 0x88[1] *
* 0x0900000004753A00@78@sqloDiagnoseFreeBlockFailure__FP8SMemFBl
* + 0xE8[2] *
* 0x090000000475384CsqloDiagnoseFreeBlockFailure__FP8SMemFBlk@gl
* + 0x74[3] 0x09000000040295D4 sqlofmblkEx + 0x458[4] *
* 0x090000000471D28Csqlra_sqlW_mem_free_sibling_list__FP8sqlrr_c
* 0x870[5] *
* 0x09000000047261B0sqlra_sqlW_mem_freespace__FP8sqlrr_cbUlPUli
* + 0x420[6] *
* 0x0900000004725CC4sqlra_sqlW_mem_freespace__FP8sqlrr_cbUlPUli@
* + 0x74[7] *
* 0x0900000005E31704sqlra_sqlW_check_for_cleanup__FP8sqlrr_cbUlP
* + 0x60[8] *
* 0x0900000004724614sqlra_sqlW_get_dynamic_section__FP8sqlrr_cbP
* 0x09000000067C9E6Csqlra_load_var__FP8sqlrr_cbP16sqlra_cached_v
* + 0x468 *
****************************************************************
* RECOMMENDATION: *
* Upgrade to DB2 UDB for Linux, Unix, Windows Version 9.5 *
* FixPack 6 *
**************************************************************** |
| Local Fix: |
|
| available fix packs: |
DB2 Version 9.5 Fix Pack 6a for Linux, UNIX, and Windows
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 |
Problem was first fixed in Version 9.5 Fix Pack 6 |
| Workaround |
not known / see Local fix |
| BUG-Tracking |
forerunner : APAR is sysrouted TO one or more of the following: IC65906 IC66405
follow-up : |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 19.01.2010
31.05.2010
31.05.2010 |
| Problem solved at the following versions (IBM BugInfos) |
9.5.,
9.5.FP6
|
| Problem solved according to the fixlist(s) of the following version(s) |
