JR37440: CRASH IN SNA_V5ROUTER

Communications Server for Windows, Version 6.4 -- Latest Fixpack

APAR status

• Closed as program error.

Error description

• Communications Server for AIX, Version 6.3
  ------------------------------------------
  Crash in sna_v5router.
  

Local fix

Problem summary

• USERS AFFECTED: All who are using the DLUR function.
  
  PROBLEM DESCRIPTION:
  System crash when starting a DLUR PU.
  Crash stack:
   CRASH INFORMATION:
   CPU 6 CSA F00000003002F780 at time of crash, error code for
   LEDs:
   70000000
   pvthread+800800 STACK:
   04AC23E8M-Xsna_v5router64:ndr_tdutp_send_conv_rsp+0001C4 F10
   001005C957420, F10001005C3D5048)
   04AC7910M-Xsna_v5router64:ndr_verb_signal_processor+000058 (
   F10001005C957420, 0002000000000002, F10001005C3D5048)
   04AC7E30M-Xsna_v5router64:ndr_queue_handler+0001C0 (F1000100
   5C957420, 0002000000000002, F10001005C3D5048)
   0484AE30M-Xsna_v5router64:nba_dispatch_input+000290 (F100011
   010E24548, F10001005C3D5048)
   0484BD28M-Xsna_v5router64:nba_scheduler+000210 ()
   0483DF34M-Xsna_v5router64:vpr_stream_lr_svc+0001A8 (F1000600
   00FECC00)
   0427F07CM-Xpse:sq_wrapper+00015C (??)
   0426A358M-Xpse:csq_run+000528 (??)
   04269008M-Xpse:csq_lateral+0000BC (??, ??, ??)
   0427F9F8M-Xpse:scheduled_run+0000D0 ()
   001F5730M-XNetintr+0001A0 ()
   001F554CM-Xnetisr_thread+000014 ()
   0016B40CM-Xthreadentry+000014 (??, ??, ??, ??)
  
  PROBLEM SUMMARY:
  The crash occurs during a narrow window where the DLUR-DLUS
  pipe fails during the activation of a DLUR internal PU.
  During this window, the TG control vectors are sent in a TDU
  with a 12C2 vector; this fails, and is not correctly handled
  to reset the control block, resulting in an attempt to access
  a NULL pointer and causing the crash.
  

Problem conclusion

• Code has been corrected to properly handle this error case.
  

Temporary fix

• sna_v5router64 .
  

Comments

APAR Information

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

  IZ60321

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

Fix information

• Fixed component name

  COMM SERV NT 6.

• Fixed component ID

  5639F2503

Applicable component levels

• R640 PSY