IV66677: SYSTEM HANGS AFTER PROCESS USES PSINFO ON ITSELF

APAR status

• Closed as fixed if next.

Error description

• ***************************************************************
  * USERS AFFECTED:
  * Systems running the AIX 6100-08 Technology Level or
  * VIOS 2.2.2.x.
  ***************************************************************
  * PROBLEM DESCRIPTION:
  * If a process tries to get psinfo on itself from a prochcall
  * resource handler during exec, that process will end up
  * stuck sleeping in prUblockSegAttach forever, waiting for
  * SEXECING_P to clear.  This will cause key system daemons to
  * eventually hang, waiting on a lock held by that process.
  * This will lead to the entire system to be effectively hung.
  *
  * This has been commonly encountered on systems running
  * Symantec VCS 6.0.xxx or custom kernel extensions that
  * register a prochcall resource handler during exec.
  ***************************************************************
  * RECOMMENDATION:
  * An interim fix is available from either
  * ftp://aix.software.ibm.com/aix/ifixes/iv66677/
  * https://aix.software.ibm.com/aix/ifixes/iv66677/
  ***************************************************************
  

Local fix

Problem summary

• ***************************************************************
  * USERS AFFECTED:
  * Systems running the AIX 6100-08 Technology Level or
  * VIOS 2.2.2.x.
  ***************************************************************
  * PROBLEM DESCRIPTION:
  * If a process tries to get psinfo on itself from a prochcall
  * resource handler during exec, that process will end up
  * stuck sleeping in prUblockSegAttach forever, waiting for
  * SEXECING_P to clear.  This will cause key system daemons to
  * eventually hang, waiting on a lock held by that process.
  * This will lead to the entire system to be effectively hung.
  *
  * This has been commonly encountered on systems running
  * Symantec VCS 6.0.xxx or custom kernel extensions that
  * register a prochcall resource handler during exec.
  ***************************************************************
  * RECOMMENDATION:
  * An interim fix is available from either
  * ftp://aix.software.ibm.com/aix/ifixes/iv66677/
  * https://aix.software.ibm.com/aix/ifixes/iv66677/
  ***************************************************************
  

Problem conclusion

Temporary fix

• *********
  * HIPER *
  *********
  

Comments

• This APAR is being closed FIN. This means that a solution to
  this APAR is expected to be delivered from IBM in a release
  (if any) to be available within the next 24 months.
  

APAR Information

• APAR is sysrouted FROM one or more of the following:

  IV65814

• APAR is sysrouted TO one or more of the following:

Fix information

Applicable component levels

• R610 PSY

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