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MF67004 - LIC-COMM-TCPIP QoS Enabled Memory Leak on TCP Listening Sock

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PTF ( Program Temporary Fixes ) Cover letter


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Abstract

LIC-COMM-TCPIP QoS Enabled Memory Leak on TCP Listening Sock


Pre/Co-Requisite PTF / Fix List

REQ  LICENSED           PTF/FIX  LEVEL

TYPE PROGRAM  RELEASE   NUMBER   MIN/MAX  OPTION
---- -------- --------- -------  -------  ------
CO   5770999  V7R4M0    MF67002   00/00    0000



NOTICE:
-------
Application of this PTF may disable or render ineffective programs that
use system memory addresses not generated by the IBM translator,
including programs that circumvent control technology designed to limit
interactive capacity to purchased levels.  This PTF may be a prerequisite
for future PTFs.  By applying this PTF you authorize and agree to the
foregoing.

This PTF is subject to the terms of the 'IBM License Agreement for Machine
Code', the terms of which were provided in a printed document that was
delivered with the machine.

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INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OR CONDITIONS OF
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REGARDING THE PTF.





APAR Error Description / Circumvention

-----------------------------------------------
Systems with IP QoS enablement (IPQOSENB) set to a value of *YES
on Change TCP/IP Attributes (CHGTCPA) CL command, leak an object
from user heap, TcpHeap, when a TCP listening socket is closed.
If the heap eventually fills, new socket connections are unable
to be established.

CORRECTION FOR APAR MA48126 :
-----------------------------
New TCP listening sockets no longer leak the object from user
heap when the socket is closed.

CIRCUMVENTION FOR APAR MA48126 :
--------------------------------
None.


Activation Instructions


None.




Special Instructions


None.


Default Instructions

THIS PTF CAN BE APPLIED IMMEDIATE OR DELAYED.



Supersedes

PTF/FIX NO(S).  APAR TITLE LINE
--------------  ------------------------------------------------------------
     NONE

Summary Information

System..............................i
Models..............................
Release.............................V7R4M0
Licensed Program...............5770999
APAR Fixed..........................View details for APAR MA48126
Superseded by:......................
Recompile...........................N
Library.............................QSYS
MRI Feature ........................NONE
Cum Level...........................C0121740


IBM i Support

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Document Information

Modified date:
16 May 2020