PJ41390: A CTL-1 error may happen if an application corrupts ECB field CE1IN1.

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APAR status

  • Closed as program error.

Error description

  • See problem summary.
    

Local fix

  • na
    

Problem summary

  • APAR NUMBER:  PJ41390
    PRODUCT:  z/TPF
    FUNCTIONAL AREA:  SYSTEM TASK DISPATCHER (CPU LOOP)
    SHIPPED IN PUT:  10
    
    ABSTRACT:
    A CTL-1 error may happen if an application corrupts ECB field
    CE1IN1.
    
    PACKAGE CONTENTS:
    Source Segments:
    (C) base/cp/cedm.cpy
    (C) base/cp/chk3.cpy
    (C) base/cp/chsz.cpy
    (C) base/cp/cicr.cpy
    (C) base/cp/cics.cpy
    (C) base/cp/clhh.cpy
    
    Object Only Binaries:
    None.
    
    Configuration Independent Binaries:
    None.
    
    Support Files:
    None.
    
    OTHER BINARIES TO BUILD: YES
    (C) <sys>/load/CPS0.so
    (C) <sys>/obj/cchook.o
    (C) <sys>/obj/ccmcdc.o
    (C) <sys>/obj/ccnucl.o
    (C) <sys>/obj/ccstor.o
    (C) os390/bin/ppcp.pds
    (C) os390/obj/ccmcdc.o
    COMMENTS:
    Trace log uses bit IN1TLG (x'01') in ECB page 1 field CE1IN1 to
    indicate that trace log is active for this ECB. If bit IN1TLG
    is on in byte CE1IN1, TPF assumes that trace log is active for
    this ECB and that the trace log buffer block that is referenced
    from ECB page 3 field CE3TRLOG is valid. In this case, the
    contents of CE3TRLOG are used without any validation.
    If an applications corrupts ECB field CE1IN1 and bit IN1TLG is
    set on, it is possible that the trace log buffer block address
    in CE3TRLOG has not been set properly. Trace log logic will use
    the contents of CE3TRLOG regardless of its contents. Because
    CE3TRLOG maybe garbage, a CTL-1, CTL-2, OPR-3, or OPR-4 error
    may happen.
    

Problem conclusion

  • SOLUTION:
    Logic that determines whether trace log is active for an ECB
    has been updated. When ECB bit IN1TLG (x'01') in ECB page 1
    field CE1IN1 is on, the contents of CE3TRLOG are also checked
    to verify that CE3TRLOG is not zero. Therefore, in order to
    execute trace log logic, ECB, bit IN1TLG (x'01') in ECB page 1
    field CE1IN1 must be on and ECB page 3 field CE3TRLOG must be
    non-zero.
    In addition, when trace log is turned off for an ECB, ECB page
    3 field CE3TRLOG is now set to zero.
    
    COREQS: YES
    PJ41392
    
    MIGRATION CONSIDERATIONS: NO
    None.
    
    BUILD COMMANDS AND INSTRUCTIONS: YES
    #maketpf commands for linux
    maketpf -f CPS0 cchook.o ccmcdc.o ccnucl.o ccstor.o
    maketpf CPS0 link
    #maketpf commands for z/OS
    maketpf -f ppcp ccmcdc.o
    maketpf ppcp link
    
    UPDATED INFORMATION UNITS: NO
    None.
    
    See your IBM representative if you need additional information.
    
    DOWNLOAD INSTRUCTIONS:
    http://www.ibm.com/software/htp/tpf/maint/maintztpf.html
    
    APAR URL:
    http://www.ibm.com/software/htp/tpf/ztpfmaint/put10/PJ41390.htm
    

Temporary fix

Comments

APAR Information

  • APAR number

    PJ41390

  • Reported component name

    Z/TPF

  • Reported component ID

    5748T1501

  • Reported release

    110

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-08-13

  • Closed date

    2013-08-30

  • Last modified date

    2013-08-30

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

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

Fix information

  • Fixed component name

    Z/TPF

  • Fixed component ID

    5748T1501

Applicable component levels

  • R110 PSY

       UP



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Document information


More support for:

TPF
z/TPF

Software version:

110

Reference #:

PJ41390

Modified date:

2013-08-30

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