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IV68988: REALLOC() MAY CORRUPT MALLOC META DATA IF DATA ULIMIT IS REACHED APPLIES TO AIX 7100-03

A fix is available

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • Documentation of realloc: "If no memory object can be
    acquired to accommodate the request, the object remains
    unchanged."
    
    In case "realloc(Pointer, Size)" fails, as the data
    ulimit
    is reached (errno ENOMEM) the memory pointed to by
    "Pointer"
    gets corrupted and fails to be freed later on.
    

Local fix

  • Make sure the code execution never hits a data memory
    limit.
    

Problem summary

  • Realloc() corrupts malloc data if data limit is crossed.
    

Problem conclusion

  • Fixing the malloc data.
    

Temporary fix

Comments

  • 6100-09 - use AIX APAR IV69040
    7100-03 - use AIX APAR IV68988
    

APAR Information

  • APAR number

    IV68988

  • Reported component name

    AIX V7.1

  • Reported component ID

    5765H4000

  • Reported release

    710

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Submitted date

    2015-01-28

  • Closed date

    2015-01-28

  • Last modified date

    2015-05-22

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

    IV67641

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

Fix information

  • Fixed component name

    AIX V7.1

  • Fixed component ID

    5765H4000

Applicable component levels

  • R710 PSY U869596

       UP15/05/20 I 1000



Document information

More support for: AIX Enterprise Edition

Software version: 710

Operating system(s): AIX

Reference #: IV68988

Modified date: 22 May 2015