IV21416: CRASH IN SNA_MUX

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • Communications Server for AIX
    -----------------------------
    Crash in sna_mux.
    

Local fix

Problem summary

  • USERS AFFECTED: All using the back-level LU6.2 APIs.
    
    PROBLEM DESCRIPTION:
    Dump stack:
    CPU 0 CSA F000000030033600 at time of crash, error code for
    LEDs: 30000000
    pvthread+002300 STACK:
    ___memmove64+000024 ()
    sna_mux64:vba_buf_to_mblk_copy+000164 (F1000E0004615D00,
    000000C8000000C8, F1000E0006B1C11C, 0000000800000008)
    sna_mux64:tps_parsed_ltv+000204 (0008000000000008,
    0003000000000003, F1000E0006B1C11C, 0F00023A0F00023A)
    sna_mux64:tps_parse_ltv+0000D4 (F1000E0006B1C11C,
    0000006000000060, F1000000C078E090, 0F00023A0F00023A)
    sna_mux64:tps_rcv_query_dload_rsp+000234 (F1000E0006B1C100)
    sna_mux64:tps_receive_proc+0000EC (0000000000000000,
    0FFFFFFFF007F9A0, F1000000C06E5B58)
    sna_ddpmgr64:sna_p_vpm_rcv_datagram+000180 (F1000E0006C301D8,
    F1000E0006B1C100, 0FFFFFFFF007FA60)
    sna_ddpmgr64:vpm_rcv_msg+0000C8 (F1000E0006C30100)
    sna_ddpmgr64:sna_p_vpm_stream_r_svc+00002C (F1000E000425DC00)
    pse:sq_wrapper+000134 (??)pse:csq_run+00029C (??)
    pse:csq_lateral+00036C (??, ??, ??)
    pse:scheduled_run+000100 ()
    .hkey_legacy_gate+00004C ()
    Netintr+0002F8 ()
    netisr_thread+000020 ()
    threadentry+000094 (??, ??, ??, ??)
    
    PROBLEM SUMMARY:
    The crash occurs when loading a back level LU 6.2 application.
    The problem is introduced by a previous fix (LI75513) which was
    included, though not listed, in the 6.4.0.2 level. The TP Server
    code is shared between the user space TP Server daemon and APPC
    libraries and the kernel space back-level LU 6.2 code. The fix
    was not correct for the kernel code where a message was used
    twice. In most cases thise was harmless, but when an unitialized
    field matched a control block index, we tried to release a
    streams message before we had finished using it, and hence
    caused the crash.
    

Problem conclusion

  • Code has been maltered to apply the previous fix to only the
    user space code, because there is no need for the extra error
    checking in the kernel space back-level code.
    

Temporary fix

  • sna_mux64
    

Comments

APAR Information

  • APAR number

    IV21416

  • Reported component name

    CS AIX V6.X

  • Reported component ID

    5765E5100

  • Reported release

    640

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-05-17

  • Closed date

    2012-05-17

  • Last modified date

    2012-09-11

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

    IV06518

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

Fix information

  • Fixed component name

    CS AIX V6.X

  • Fixed component ID

    5765E5100

Applicable component levels

  • R640 PSY U851826

       12/09/11 I 1000



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Document information


More support for:

Communications Server for AIX

Software version:

640

Reference #:

IV21416

Modified date:

2012-09-11

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