IV87518: FIXED RARE CRASH WITH SHAMATTED FILES. APPLIES TO AIX 7100-03 17/01/27 PTF PECHANGE

APAR status

• Closed as program error.

Error description

• A crash may occur when shmat is used on a file by multiple
  concurrent processes.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:
  * Systems running the 7100-03 Technology Level with bos.mp64
  * at or between 7.1.3.30 and 7.1.3.48
  ****************************************************************
  * PROBLEM DESCRIPTION:
  * A crash may occur when shmat is used on a file by multiple
  * concurrent processes.
  ****************************************************************
  * RECOMMENDATION:
  * Install APAR IV87518.
  ****************************************************************
  

Problem conclusion

• We avoid the crash by ignoring the case were we already
  extend the shamatted file.
  

Temporary fix

Comments

APAR Information

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

  IV87470

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

  002PC0Ÿ

Fix information

• Fixed component name

  AIX V7.1

• Fixed component ID

  5765H4000

Applicable component levels

• R710 PSY U872346

     UP17/01/19 I 1000