LI72604: SIGNAL #11 IN SQLEX_GET_OTHER_GROUP_LIST FUNCTION CAUSES INSTANCE TO CRASH IN CONNECTION CONCENTRATOR ENVIRONMENT

DB2 Version 9.1 Fix Pack 7  for Linux, UNIX and Windows
DB2 Version 9.1 Fix Pack 5   for Linux, UNIX and Windows
DB2 Version 9.1 Fix Pack 6   for Linux, UNIX and Windows
DB2 Version 9.1 Fix Pack 6a for Linux, UNIX and Windows
DB2 Version 9.1 Fix Pack 7a  for Linux, UNIX and Windows
DB2 Version 9.1 Fix Pack 8  for Linux, UNIX and Windows
DB2 Version 9.1 Fix Pack 9  for Linux, UNIX and Windows
DB2 Version 9.1 Fix Pack 10  for Linux, UNIX and Windows
DB2 Version 9.1 Fix Pack 11  for Linux, UNIX and Windows
DB2 Version 9.1 Fix Pack 12  for Linux, UNIX and Windows

APAR status

• Closed as program error.

Error description

• If AUTHENTICATION in the database manager configuration is set
  to one of the following:
  
  KERBEROS
  KRB_SERVER_ENCRYPT
  GSSPLUGIN
  GSS_SERVER_ENCRYPT
  
  AND connection concentrator is turned on,
  then there is a small potential to get a signal #11
  instance crash with the following stack trace back:
  
  sqlex_get_other_group_list + 0x0245
  sqlrr_insert_authinfo + 0x038c
  sqlrr_set_authinfo + 0x092a
  sqlra_set_stmt_authid + 0x0232
  sqlragsn + 0x06f1
  sqlrr_sql_request_pre + 0x04c1
  sqlrr_execute + 0x00c7
  
  This APAR will remove the codepath that can result in this
  crash.
  

Local fix

• change authentication so that it does not use above mentioned
  plugins.
  

Problem summary

• Users Affected: ALL
  Problem Description:
  SIGNAL #11 IN SQLEX_GET_OTHER_GROUP_LIST FUNCTION CAUSES
  INSTANCE TO CRASH IN CONNECTION CONCENTRATOR ENVIRONMENT
  Problem Summary:
  If AUTHENTICATION in the database manager configuration is set
  to one of the following:
  
  KERBEROS
  KRB_SERVER_ENCRYPT
  GSSPLUGIN
  GSS_SERVER_ENCRYPT
  
  AND connection concentrator is turned on,
  then there is a small potential to get a signal #11
  instance crash with the following stack trace back:
  
  sqlex_get_other_group_list + 0x0245
  sqlrr_insert_authinfo + 0x038c
  sqlrr_set_authinfo + 0x092a
  sqlra_set_stmt_authid + 0x0232
  sqlragsn + 0x06f1
  sqlrr_sql_request_pre + 0x04c1
  sqlrr_execute + 0x00c7
  
  This APAR will remove the codepath that can result in this
  crash.
  

Problem conclusion

• Problem was first fixed in Version 9 Fix Pak 5
  

Temporary fix

• change authentication so that it does not use above mentioned
  plugins.
  

Comments

APAR Information

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

  LI72603

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

  LI72665

Fix information

• Fixed component name

  DB2 UDE ESE LIN

• Fixed component ID

  5765F4104

Applicable component levels

• R910 PSY

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