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MF66879 - LIC-OTHER-UNPRED ALL USERS GET ACCESS DENIED ON MAPPED DRIVE

PTF Cover Letter


PTF ( Program Temporary Fixes ) Cover letter


Order this fix

Abstract

LIC-OTHER-UNPRED ALL USERS GET ACCESS DENIED ON MAPPED DRIVE


Pre/Co-Requisite PTF / Fix List

REQ  LICENSED           PTF/FIX  LEVEL

TYPE PROGRAM  RELEASE   NUMBER   MIN/MAX  OPTION
---- -------- --------- -------  -------  ------
NONE



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

-----------------------------------------------
IBM i NetServer may suddenly stop processing SMB3 client
requests after the server has been running without error for a
period of time. Several LIC logs for NetServer are generated
(VL4400000C and VL44000055.) All users suddenly get Access
Denied error messages on mapped drives.  An IPL of the system is
required to restore NetServer connectivity.

This problem is more likely to happen when IBM i NetServer or
its SMB clients are configured to require message signing.

CORRECTION FOR APAR MA48085 :
-----------------------------
IBM i NetServer encountered a heap exhaustion error when
attempting to verify an SMB3 message signature.  The heap ran
out of storage space because of a memory leak, and NetServer was
unable to verify any signed client requests that followed.

This PTF corrects the memory leak.

CIRCUMVENTION FOR APAR MA48085 :
--------------------------------
None.


DESCRIPTION OF PROBLEM FIXED FOR APAR MA48090 :
-----------------------------------------------
IBM i NetServer may create LIC log 4400 100D when processing an
SMB2 Set_Info request that is not supported by the server.  The
server does not send a response to the client request, and the
client may end the connection with an error.

CORRECTION FOR APAR MA48090 :
-----------------------------
IBM i NetServer was not correctly initializing the response
structure.  It encountered an exception during processing of the
error response.

The PTF corrects the initialization problem.

CIRCUMVENTION FOR APAR MA48090 :
--------------------------------
None.


Activation Instructions


None.




Special Instructions


ENDTCPSVR *NETSVR before applying or removing the PTF.
STRTCPSVR *NETSVR after applying or removing the PTF.


Default Instructions

THIS PTF CAN BE APPLIED IMMEDIATE OR DELAYED.



Supersedes

PTF/FIX NO(S).  APAR TITLE LINE
--------------  ------------------------------------------------------------
   MF66534      LIC-INCORROUT RENAME FAILS WITH 0X80070091 OVER NON-EMPTY DI
   MF66386      OSP-INCORROUT NETSERVER SMB2_READ FAILS WITH STATUS_INVALID_

Summary Information

System..............................i
Models..............................
Release.............................V7R4M0
Licensed Program...............5770999
APAR Fixed..........................View details for APAR MA48085
View details for APAR MA48090
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