PK36574: 0S03I PROGRAM CHECK INTERRUPTION IN DFHTSP.

APAR status

• Closed as program error.

Error description

• the tempstorage record has a four-byte overlay that spans from
  byte five through byte nine of the ts header record. the overlay
  of TS header causes the DFHTSP routine to determine that a ICE
  has been appended to the TS record. hence DFHTSP subtracts x'44'
  bytes from the record length. IF the overlaid TS record contains
  a datalength ('LL' field) that is less than x'44' bytes a subtra
  ct x'44' from the original length will cause the length register
  to propagate  FF into the high order fields of the length regist
  ers. DFHTSP executes a mvclwhich destroysthe region.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All                                          *
  ****************************************************************
  * PROBLEM DESCRIPTION: CICS terminated with an 0C4 protection  *
  *                      exception.                              *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  An overlay of CICS storage placed an x'F0' over byte 7 of a
  TSCI within a main temporary storage record in memory. This
  made the record appear to have an associated ICE, and so
  DFHTSP subtracted the length of an ICE from the record
  length, to set up the length of the actual data for its
  subsequent MVCL instruction. Since there was no ICE, the
  subtraction resulted in a negative length, as the record
  length was smaller than the size of an ICE. This incorrect
  length was used on the MVCL, leading to CICS storage
  being corrupted and subsequent program checks within
  DFHTSP AND DFHSRP.
  KEYWORDS: s0C4 abends0c4 abend0c4 DFHTSPA TSP TSPA SRP
            TSTRIOE IOERROR TSIOERROR TSIOERR MSG0S03I
            main task termination problem program
  

Problem conclusion

• DFHTSP has been modified to police against this form of
  corruption, by returning an IOERR if a negative length is
  calculated, instead of issuing the MVCL and using it.
  

Temporary fix

• *********
              * HIPER *
              *********
  FIX AVAILABLE BY PTF ONLY
  

Comments

APAR Information

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

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

  UK22318

Modules/Macros

• DFHTSP   DFHTSPA
  

Fix information

• Fixed component name

  CICS/VSE

• Fixed component ID

  568602601

Applicable component levels

• R14X PSY UK22318

     UP07/02/20 P E411 Ž