IC91115: "DSMC SCHED" COMMAND CAN CORE DUMP WHEN LAN-FREE ENABLED

IBM Tivoli Storage Manager (TSM) Client 7.1.0 Downloads
IBM Tivoli Storage Manager (TSM) Client 6.3.2 Downloads and READMEs

APAR status

• Closed as program error.

Error description

• In a LAN-free environment the command "dsmc sched" can core dump
  in the following case:
  1. The communications protocol between the Tivoli Storage
  Manager client and Storage Agent is shared memory.
  2. The session  between client and storage agent is failed for
  some reason.
  
  The stack of crash dump is the following:
  
  
  IOT/Abort trap in pthread_kill at 0x900000000818d30 ($t1)
  0x900000000818d30 (pthread_kill+0xb0) e8410028          ld
  r2,0x28(r1)
  
  (dbx) where
  pthread_kill(??, ??) at 0x900000000818d30
  _p_raise(??) at 0x9000000008185e4
  raise.raise(??) at 0x9000000000384e8
  abort() at 0x9000000000536e4
  psunxthr.psAbort()() at 0x100029e40
  psunxthr.psTrapHandler(int,int,__sigcontext*)() at 0x100029db0
  dsmem.chkSnake(void*,const char*,int)() at 0x1000074f4
  dsmem.dsmFree(void*,char*,unsigned int)() at 0x10000708c
  commopt.deallocateBufferPool(Comm_p*)() at 0x1002824cc
  session.Sess_o::sessTerminate()() at 0x100108aa0
  schedobj.CloseSchedSession(privSched_tag*,Sess_o*)() at
  0x1006a6e6c
  schedobj.HandleWaitForServerState(privSched_tag*,schedState_t*)(
  ) at
  0x10069fefc
  schedobj.DoState(SchedObj_t*)() at 0x10069b378
  schedobj.Scheduler(SchedObj_t*)() at 0x10069ae98
  dscLoop(int,char**)() at 0x100001fbc
  dscmain(int,char**)() at 0x100000b1c
  main() at 0x100000828
  
  dsmerror.log reports;
   ANS9201W LAN-free path failed.
  ANS0361I DIAG: ../mem/dsmem.cpp    ( 655): Block
  header invalid, possible memory overwrite. Addr a00000000000000,
  File
  commopt.cpp, Line 454
  
  
  
  Tivoli Storage Manager Versions Affected:
  Tivoli Storage Manager B/A Client on Unix: 6.1, 6.2, 6.3, 6.4
  
  Initial Impact:
  Medium
  
  
  Additional Keywords:
  TSM zz61 zz62 zz63 z64 core dump crash abort sched schedule
  

Local fix

• Disable lan-free to prevent "dsmc sched" from core dumping,
  or switch to using lanfreecommmethod tcpip
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: Backup-archive client versions 6.1 to 6.4    *
  *                 running on the following platforms:          *
  *                 AIX, Linux, Solaris, HP-UX.                  *
  ****************************************************************
  * PROBLEM DESCRIPTION: See ERROR DESCRIPTION                   *
  ****************************************************************
  * RECOMMENDATION: Apply fixing level when available. This      *
  *                 problem is currently projected to be fixed   *
  *                 in levels 6.3.2 and 6.4.2. Note that until   *
  *                 the fixing levels are available, this        *
  *                 information is subject to change at the      *
  *                 discretion of IBM.                           *
  ****************************************************************
  *
  

Problem conclusion

• The problem has been fixed so that it no longer occurs.
  

Temporary fix

Comments

APAR Information

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

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

Modules/Macros

• DSMC
  

Fix information

• Fixed component name

  TSM CLIENT

• Fixed component ID

  5698ISMCL

Applicable component levels

• R63A PSY

     UP

• R63H PSY

     UP

• R63L PSY

     UP

• R63S PSY

     UP

• R64A PSY

     UP

• R64H PSY

     UP

• R64L PSY

     UP

• R64S PSY

     UP