IZ81648: NETWORK OPTIONS COMMAND (NO) PERMITS INVALID VALUES APPLIES TO AIX 5300-12

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• sb_max represents an upper bound for the network option
  values tcp_sendspace, tcp_recvspace, udp_sendspace,
  udp_recvspace; the "no" command however permits setting
  sb_max to a value lower than the values it bounds.
  
  One impact of this is to cause inetd to exit when it
  encounters failures on socket API calls. Other network
  applications are also likely to be affected similarly
  when sb_max is thus erroneously changed.
  

Local fix

• When reducing sb_max, at no point should it be set
  to a value less than any of the send/recv space
  parameters.
  Any of these parameters that exceed the prospective value
  of sb_max should be reduced to a value not exceeding the
  new sb_max value first.
  

Problem summary

• Setting sb_max's value lesser than its dependents values can
  make further sockets calls to fail.
  

Problem conclusion

• Appropriate code changes made to prevent sb_max from setting
  to a value lesser than its dependents.
  

Temporary fix

Comments

• 5300-09 - use AIX APAR IZ82353
  5300-10 - use AIX APAR IZ82581
  5300-11 - use AIX APAR IZ82408
  5300-12 - use AIX APAR IZ81648
  6100-02 - use AIX APAR IZ79475
  6100-03 - use AIX APAR IZ79547
  6100-04 - use AIX APAR IZ79020
  6100-05 - use AIX APAR IZ78678
  6100-06 - use AIX APAR IZ73311
  7100-00 - use AIX APAR IZ82128
  

APAR Information

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

  IZ68381

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

Fix information

• Fixed component name

  AIX 5.3

• Fixed component ID

  5765G0300

Applicable component levels

• R530 PSY U830349

     UP10/09/20 I 1000

PTF to Fileset Mapping

• U830349 bos.net.tcp.client 5.3.12.1