PTF Cover Letter
PTF ( Program Temporary Fixes ) Cover letter
TCPIP-TELNET-UNPRED VLOG 0701005D TELNET CLIENTS DROPPED
Pre/Co-Requisite PTF / Fix List
REQ LICENSED PTF/FIX LEVEL
TYPE PROGRAM REL NUMBER MIN/MAX OPTION
---- -------- --- ------- ------- ------
PRE 5770999 710 MF53626 00/00 0000
PRE 5770999 710 MF50881 00/00 0000
PRE 5770999 710 MF48794 00/00 0000
CO 5770999 710 MF54614 00/00 0000
DIST 5770SS1 710 SI36974 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.
SUBJECT TO ANY WARRANTIES WHICH CAN NOT BE EXCLUDED OR EXCEPT AS EXPLICITLY
AGREED TO IN THE APPLICABLE LICENSE AGREEMENT OR AN APPLICABLE SUPPORT
AGREEMENT, IBM MAKES NO WARRANTIES OR CONDITIONS EITHER EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OR CONDITIONS OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON INFRINGEMENT,
REGARDING THE PTF.
APAR Error Description / Circumvention
-----------------------------------------------
Unpredictable results in seemingly valid Telnet clients results
in dropped connections for no apparent valid reason. The Telnet
server generates VLOG 0701 005D ( 0701005D ) when an errant
Telnet client is sending valid Telnet data streams, but appears
to be stuck in a loop or sending excessive streams of Telnet
commands to process.
An error in the way this is tracked by the system can cause the
value to go below zero. This value was an unsigned integer, but
can "underflow" and take on a huge positive value on some
systems.
CORRECTION FOR APAR MA43764 :
-----------------------------
Timing between tasks involved is triggering run away Telnet
client detection.
Sensitivity to errant Telnet clients has been corrected to
handle task timing differences due to some system differences in
task processing while still protecting from errant Telnet
clients or Denial of Service (DoS) attacks.
CIRCUMVENTION FOR APAR MA43764 :
--------------------------------
None.
Activation Instructions
None.
Special Instructions
********************************************************************
THE FOLLOWING ARE SUPERSEDED SPECIAL INSTRUCTIONS. IF THE SUPERSEDED
PTF HAS ALREADY BEEN APPLIED AND ITS SPECIAL INSTRUCTION FOLLOWED,
IT IS NOT NECESSARY TO FOLLOW THAT SPECIAL INSTRUCTION AGAIN.
********************************************************************
SPECIAL INSTRUCTIONS FOR SUPERSEDED PTF MF55933 :
=================================================
Before applying or removing this PTF, you need to end Telnet.
Use the "ENDTCPSVR *TELNET" CL command.
Then apply or remove the PTF.
Once that is complete, start Telnet using the "STRTCPSVR *TELNET" CL
command.
SPECIAL INSTRUCTIONS FOR SUPERSEDED PTF MF53665 :
=================================================
If a VT API application is currently experiencing the problem, that
program will need to end and restart to get the fix.
Before applying or removing this PTF, you need to end Telnet.
Use the "ENDTCPSVR *TELNET" CL command.
Then apply or remove the PTF.
Once that is complete, start Telnet using the "STRTCPSVR *TELNET" CL
command.
SPECIAL INSTRUCTIONS FOR SUPERSEDED PTF MF50253 :
=================================================
To apply or remove this ptf in immediate mode:
1. End the Telnet server with CL command "ENDTCPSVR *TELNET"
2. Use ENDJOB to end all jobs with a job name of "QTVDEVICE" that
are
running in the QSYSWRK subsystem.
3. Apply or remove the PTF.
4. Re-start the Telnet server with the command "STRTCPSVR *TELNET"
SPECIAL INSTRUCTIONS FOR SUPERSEDED PTF MF48300 :
=================================================
Before applying or removing this PTF, you need to end Telnet. Use the
"ENDTCPSVR *TELNET" CL command. Then use WRKACTJOB to find all of the
jobs with a job name of QTVDEVICE in the QSYSWRK subsystem. Do an
ENDJOB with the *IMMED option on all of the QTVDEVICE jobs.
Then apply or remove the PTF. Once that is complete, start Telnet using
the "STRTCPSVR *TELNET" CL command.
Default Instructions
THIS PTF CAN BE APPLIED IMMEDIATE OR DELAYED.
Supersedes
PTF/FIX NO(S). APAR TITLE LINE
-------------- ------------------------------------------------------------
MF58107 F/TDTASKPAGEABLE-MSGMCH3402 MCH3402 ENTERING WRKSYSACT
MF57402 OSP-COMM-UNPRED TELNET STOPS PROCESSING NEW CONNECTIONS
MF57402 OSP-COMM-TCPIP-OTHER ERRANT TELNET MAY CAUSE STREAMS LEAK
MF56844 OSP-OTHER-MSGCPDBCA9 TELNET SSL connections fail
MF56553 OSP-MSGTCP84C6 TELNET NOT WORKING AFTER IPL TCP84C6 MESSAGE
MF56377 F/#MSTRTNS-FLDS/IXPTN80 FFDC F/#MSTRTNS-FLDS/IXPTN80
MF55933 OSP-COMM-TCPIP-OTHER-UNPRED TELNET KEEPALIVE TIMER SETTINGS
MF55751 OSP-COMM-OTHER-WAIT TELNET SERVER HANG
MF55356 OSP-COMM-TCPIP-OTHER-UNPRED ABNORMAL END OF TELNET SESSION M
MF55271 LIC-LWS-UNPRED CPF87D3 AGAINST QTVSEVHD WITH WEBFACING
MF54615 OSP-COMM-TCPIP-OTHER-WAIT IMPROVE FAULT TOLERANCE OF TELNET
MF53665 LIC-COMM-TCPIP-UNPRED UNPREDICTABLE RESULTS WITH INCORRECTLY
MF53285 LIC-COMM-TCPIP-UNPRED ERRANT TELNET CLIENTS MAY CAUSE TELNET
MF53102 OSP-COMM-TCPIP-OTHER-UNPRED ABNORMAL TELNET CLIENT ACTIVITY
MF53102 TCPIP-TELNET-F/QTVTNCSH-T/QTVTNCSH-RC3418-MSGTCP2548 TELNET
MF50886 TCPIP-TELNET-F/QTVTNCSH-T/QTVTNCSH-RC3418-MSGTCP2548 STREAM
MF50886 TCPIP-TELNET-UNPRED TELNET SESSIONS HANG AFTER CONNECTING, B
MF50886 LIC-COMM-OTHER-WAIT INTERACTION BETWEEN NETSTAT AND TELNET C
MF50253 TCPIP-TELNET VLOGs occur when ending and starting Telnet wit
MF50151 TCPIP-TELNET-WAIT TELNET MAY DEADLOCK AND STOP NEW COMMUNICA
MF49142 TCPIP-TELNET-INCORROUT TELNET SERVER WILL CLOSE THE SESSION
MF48814 LIC-COMM-OTHER-SRC07000050-UNPRED 0700 0050 VLOG MAY BE GENE
MF48814 OSP-PERFM TIMING ISSUE WITH SSL TELNET CONNECTION
MF48560 OSP-OTHER-UNPRED TELNET VIA JAVA PLUG IN FAILED
MF48300 OSP-WAIT SSL ISERIES TO ISERIES TELNET CONNECTION HANG.
MF48300 TCPIP-TELNET-PERFM QTVDEVICE JOBS ABEND RESULTING IN 0700 00
MF52400 OSP-SRC0701005C-UNPRED TELNET VLOG 0701 005C LOGGED DURING I
Summary Information
System.............................. | i |
Models.............................. | |
Release............................. | V7R1M0 |
Licensed Program............... | 5770999 |
APAR Fixed.......................... | View details for APAR MA43764 |
Superseded by:...................... | View fix details for PTF MF65459 |
Recompile........................... | N |
Library............................. | QSYS |
MRI Feature ........................ | NONE |
Cum Level........................... | C5142710 |
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Document Information
Modified date:
06 November 2014