PH11728: DFHTR0112 BAD DATA PASSED FOR TRACING TO MODULE DFHTRPT.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Repeated abend0C4 S0C4/AKEA in DFHSOCK DFHTRPX and DFHTRPT.
  KE task stack entry looks as follows:
  Offs Error Name                      Caller
  -------------------------------------------
  ....       .......
  5D12       DFHSOCK
  55FE       CLOSE_SOCK                +0000
  2736       DFHSOSE
  0208       SECURE_SOC_CLOSE          +0000
  0AED       DFHLEPT
  0232       INVOKE_PTHREAD            +0000
  09DA       DISPATCH_PTHREAD          +0996
  0000       DFHLEPTQ
  6DAA *YES* DFHSOCK
  0536       FUNCTIONAL_RECOVERY       +0000
  14FB *YES* DFHTRPT
  5149       DFHMEME
  03DA       SEND                      +0000
  43AA       CONTINUE_SEND             +42AA
  1BDE       TAKE_A_DUMP_FOR_CALLER    +1AB0
  1D4E       DFHDUDU
  0212       SYSTEM_DUMP               +0000
  
  This is caused by a DFHSOCK SEND_SSL_DATA call (made from
  SKWRITE with a 64-bit plist) getting a DSAT_TCB_NOT_FREE
  exception on a CHANGE_MODE call.  This causes the generic
  severe_error routine to try and trace out the plist. This
  routine assumes a 31-bit plist address and gets an 0C4 when it
  uses the bottom half of the 64-bit address.  The recovery
  routine makes the same sort of trace and gets the same problem.
  

Local fix

• n/a
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS users.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: Multiple S0C4/AKEA abends in DFHSOCK    *
  *                      when making an exception trace entry.   *
  ****************************************************************
  A TCPIPSERVICE has SSL(YES) and a web request is sent to its
  associated port. There are insufficient S8 TCBs for the volume
  of work and the request is purged by CICS.
  The error path includes a call to DFHSOCKM SEND_SSL_DATA request
  with a 64-bit parameter list. DFHSOCK runs as AMODE 31 but
  switches briefly to AMODE 64 to copy the 64-bit parameter list
  to 31-bit storage on entry. During DFHSOCK processing a DFHDSATM
  CHANGE_MODE call fails with DSAT_TCB_NOT_FREE. An attempt is
  made to output an exception trace entry for sockets domain trace
  point SO '02A0'X but this fails with an 0C4 because
  the severe_error routine incorrectly attempts to use the
  original 64-bit DFHSOCK parameter list address rather than the
  copy.
  Control then passes to the recovery routine which issues a trace
  request for trace point SO '0203'X. There is a further 0C4
  because it similarly uses the original 64-bit parameter list
  pointer while running in AMODE 31.
  

Problem conclusion

• The DFHSOCK severe_error routine is changed to use the
  31-bit copy of the DFHSOCK parameter list when the module is
  called with a 64-bit parameter list. The DFHSOCK recovery
  routine is also changed to use a 31-bit copy when appropriate.
  

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:

  UI66032 UI66033

Modules/Macros

• DFHSOAD  DFHSOCK  DFHSODM  DFHSODUF DFHSOIS  DFHSOL   DFHSOLI
  DFHSOLS  DFHSOLX  DFHSOLX6 DFHSOM01 DFHSOM02 DFHSOM03 DFHSOPL
  DFHSORD  DFHSOS00 DFHSOS01 DFHSOS02 DFHSOS03 DFHSOS04 DFHSOS05
  DFHSOS06 DFHSOS07 DFHSOS08 DFHSOS09 DFHSOS10 DFHSOS11 DFHSOS12
  DFHSOS13 DFHSOS14 DFHSOS15 DFHSOS16 DFHSOS17 DFHSOS18 DFHSOS19
  DFHSOS20 DFHSOS21 DFHSOS22 DFHSOS23 DFHSOSE  DFHSOST  DFHSOTB
  DFHSOTI  DFHSOTRI DFHSOUE  DFHSOXM  DFHWBA   DFHWBBLI DFHWBXM
  DFHWBXN
  

Fix information

• Fixed component name

  CICS TS Z/OS V5

• Fixed component ID

  5655Y0400

Applicable component levels

• R100 PSY UI66032

     UP19/10/25 P F910

• R200 PSY UI66033

     UP19/10/25 P F910

Fix is available

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