A fix is available
APAR status
Closed as program error.
Error description
S0C4 abend in RRS address space performs a PC call back into queue manager. A PGM 11 interrupt occurs due to a reference to invalid storage. The MQ dump gathering routine abends due to a defect in CSQWDSDM. This defect causes a dump of the recovery routine to be taken. Data from the original dump needed to investigate the cause of the original problem is lost.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All users of IBM MQ for z/OS Version 9 * * Release 0 Modification 0 and Release 1 * * Modification 0. * **************************************************************** * PROBLEM DESCRIPTION: If the EB for a failing process is * * freed during dump processing, this can * * cause an 0C4 abend in CSQWDSDM. * **************************************************************** The dump processing code uses the EB to find related control blocks to collect the relevant storage to dump. The code doesn't check if the EB has been freed, meaning that it's not safe to use it to perform these finds. Depending on how the EB is reused, this can cause an 0C4 abend.
Problem conclusion
The code has been changed to check the EB hasn't been freed before using it.
Temporary fix
Comments
APAR Information
APAR number
PH21430
Reported component name
IBM MQ Z/OS V9
Reported component ID
5655MQ900
Reported release
000
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2020-01-24
Closed date
2020-04-16
Last modified date
2020-06-01
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UI69035 UI69036
Modules/Macros
CSQWDSDM
Fix information
Fixed component name
IBM MQ Z/OS V9
Fixed component ID
5655MQ900
Applicable component levels
Fix is available
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Document Information
Modified date:
02 June 2020