PM88080: MICROSOFT WINDOWS CRASHES WHEN LB REASSEMBLES FRAGMENTED PACKETS

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • 64-bit Microsoft Windows crashes when LB reassembles
    fragmented packets. There are structure overlays involved in
    reassembling fragmented packets.
    
    The overlays are not aligned so it results in an invalid
    pointer and a crash.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  WebSphere Application Server Load Balancer  *
    *                  for ipv4 users on Microsoft Windows 64 bit  *
    ****************************************************************
    * PROBLEM DESCRIPTION: A crash (blue screen) occurs and        *
    *                      stack shows ip_reass function near the  *
    *                      top of the stack.                       *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    The Load Balancer reassembles fragmented packets. As part of
    this reassembly, two structures must align and they were not
    aligned across 64bit machines. This lead to an invalid pointer
    and subsequent crash.
    

Problem conclusion

  • Corrected the structures so that they align.
    Affects the Load Balancer for ipv4 only on Microsoft Windows
    64 bit machines.
    
    Fix levels :
    6.1.0.52
    7.0.0.30
    8.0.0.7
    8.5.5.1
    

Temporary fix

Comments

APAR Information

  • APAR number

    PM88080

  • Reported component name

    WEBS LOAD BALAN

  • Reported component ID

    5724H8811

  • Reported release

    800

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-04-29

  • Closed date

    2013-05-08

  • Last modified date

    2013-05-08

  • 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

    WEBS LOAD BALAN

  • Fixed component ID

    5724H8811

Applicable component levels

  • R610 PSY

       UP

  • R700 PSY

       UP

  • R800 PSY

       UP

  • R850 PSY

       UP



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Document information


More support for:

WebSphere Application Server
Edge Component

Software version:

800

Reference #:

PM88080

Modified date:

2013-05-08

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