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2942050 - Signal 11 in LDAP related calls causing LDAP connections to fail - SAP ASE

Symptom

  • ASE errorlog reports some or many signal 11s related to LDAP service
  • Most commonly, these will include functions ulauthreq , login__ldapauth & login__checkauth amongst (many) others
  • The connection that hits the signal 11 will fail, this may be seen for one, a few or all LDAP connections 

Current process (0x0) infected with signal 11 (SIGSEGV)
Address 0x0x00007f6124226454 ((null)+0x24226454) ...

with a stack trace that includes functions and messages :

Exception in blocking call execution

nthrd_backtrace                                         
kbctException
krtctskException                                          
kisignal                                                    
ldap_sasl_bind
ldap_simple_bind
kl__ldap_asyn_bind
kladminbind
kllookupdn
klbindfuncalt
ubcExecute
kbctMain
krtctskRun
ktskRun
kt__RTCMain
upsleepgeneric
ubcWaitForCompletion
undo_blockingcall_thread
klbindfuncaltw                                         
ulauthreq
login__ldapauth
login__checkauth
login_handshake

Note : Other stack patterns are reported. Not all of the above functions are seen in all cases.


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Environment

Adaptive Server Enterprise (ASE) 16.0 SP03

Product

SAP Adaptive Server Enterprise 16.0

Keywords

LDAP, LDAP service, ldap_sasl_bind, login__ldapauth, login__checkauth, login_handshake, ldap_simple_bind, kl__ldap_asyn_bind, kladminbind, CR#822003, CR822003, 822003 , KBA , BC-DB-SYB , Business Suite on Adaptive Server Enterprise , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , Bug Filed

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