PH03437: 0C4 ABEND OCCURS AT OFFSET X'392' IN MODULE DFHTRPX DUE TO HUGE MVCL WITH NEGATIVE LENGTH.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• The 0C4 abend occurs at offset x'392' in module DFHTRPX. The
  failing instruction is a huge MVCL with negative length to
  corrupt the trace table. DFHTRPX is sent a negative length
  value as part of trace data 4 as part of a x'3307' Severe error
  trace entry. This is issued by DFHPIJG because of a
  "pijg_failure_template_mismatch" ( error code 1468 ). This can
  be determined by Trace data 3.
  The syslog shows following messages,
  DFHTR0112 Bad data passed for tracing to module DFHTRPT
  DFHPI0002, a severe error (code X'3307') has occurred in module
  DFHPIJG
  Additional Symptom(s) Search Keyword(s): 0C4, DFHTRPX, severe
  error x'3307', KIXREVxxx
  

Local fix

• n/a
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All.                                         *
  ****************************************************************
  * PROBLEM DESCRIPTION: 0C4 abend occurs in DFHTRPX due to      *
  *                      large MVCL with negative length.        *
  ****************************************************************
  DFHTRPX is the fast path trace put module and is called from
  many CICS modules as an 'in-line' procedure to write trace
  entries to the internal trace table.  Usually, if it detects
  any out of bound length parameters it will make a full domain
  call to DFHTRPT to handle them. However, DFHTRPX uses signed
  fields to calculate lengths and if it receives bad data,
  the sign bit can get propagated in registers causing DFHTRPX
  to overlay storage and typically abend 0C4.
  

Problem conclusion

• DFHTRPX, DFHTRPT and DFHTRFT have been amended so they will
  generate an TR 0101 OVERLENGTH-ENTRY exception trace entry if
  an invalid length value is passed to them.
  

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:

  UI60984 UI60985 UI60986 PH09994

Modules/Macros

• DFHTRFT  DFHTRPT  DFHTRPX
  

Fix information

• Fixed component name

  CICS TS Z/OS V5

• Fixed component ID

  5655Y0400

Applicable component levels

• R000 PSY UI60986

     UP19/02/02 P F902 ¢

• R100 PSY UI60985

     UP19/01/30 P F901 ¢

• R200 PSY UI60984

     UP19/02/01 P F901 ¢

Fix is available

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