IBM Support

PH11287: WEB SERVER PLUG-IN CRASHED IN MEMCPY CALL WS_REALLYSENDREQUEST FUNCTION

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APAR status

  • Closed as program error.

Error description

  • Core dumps for IBM Http Server 8.5.5.14 were getting
    created and filling up the file system.
    Core dumps were caused by Web server Plug-in crash in memcpy
    call ws_ReallySendRequest function
    
    Operating system: Linux
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  IBM WebSphere Application Server web        *
    *                  server plugin users with Intelligent        *
    *                  Management enabled                          *
    ****************************************************************
    * PROBLEM DESCRIPTION: A crash may occur with a stack          *
    *                      indicating memcpy invoked from          *
    *                      ws_ReallySendRequest                    *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    A crash may occur when reading data from a client successfully
    but the read indicates an error occurred.
    

Problem conclusion

  • The code checked for data in the read buffer and the return
    code indicates the number of bytes read. When a read error
    occurs but data is read and placed in the buffer, the read
    size indicates -1 and a copy of -1 bytes was attempted which
    causes a crash.  The code has been fixed to check the buffer
    as well as checking for a -1 return code.
    
    The fix for this APAR is currently targeted for inclusion in
    fix pack 8.5.5.16 and 9.0.5.1.  Please refer to the
    Recommended
    Updates page for delivery information:
    http://www.ibm.com/support/docview.wss?
    rs=180&uid=swg27004980
    

Temporary fix

Comments

APAR Information

  • APAR number

    PH11287

  • Reported component name

    WEBS APP SERV N

  • Reported component ID

    5724H8800

  • Reported release

    850

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2019-04-22

  • Closed date

    2019-07-08

  • Last modified date

    2019-07-08

  • 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 APP SERV N

  • Fixed component ID

    5724H8800

Applicable component levels



Document information

More support for: WebSphere Application Server
General

Software version: 850

Reference #: PH11287

Modified date: 08 July 2019