2262332 - Signal 11 in ldap_set_option() in threaded mode - SAP ASE

• A user login to the ASE server via LDAP hits an "infected with signal 11" error at the ldap_set_option() module with a stack trace:

Current process (0x0) infected with signal 11 (SIGSEGV)
Address 0x0x00007ffff71e5c82 (ldap_set_option+0x52), siginfo (code, address) = (1, 0x0x0000000000000008)

• The stack trace includes the following modules:

ldap_set_option
kllookupdn
klbindfuncalt

• This crashes the ASE server:

ueshutdown: exiting
engine 52, os pid 215464  exited
Process 215464 exited with status 0
Engine exited with signal 11

• Example user PSS info: 

 pss 16249
 spid: 16249, kpid: 1564294270, pss: 0x0x2aaee77bc0c8, proc: 0x0x2aad11905710 dbid: 1
 pmemusage: 2, ptempdb_pages: 0, pcputot: 0, pcpucur: 0
 User: <username>, Program: sqsh-2.1.8, Command: 0 MAINTENANCE TOKEN
 Status: (0x00010000 (P_USERPROC))
 
 PSS at 0x0x2aaee77bc0c8
 
 PSS Status fields :
 pstat=0x10000 (0x00010000 (P_USERPROC))
 p2stat=0x41000 (0x00040000 (P2_LOGIN_IN_PROGRESS), 0x00001000 (P2_XLATE))
 prengine=52,  affinity=52 52 ANY

• Example engine info:

********  ENGINE Structure (0x0x2aaae2a02ff0)  ********
Engine Number 52
Engine addr 0x0x2aaae2a02ff0 estatus: 8,epid: 215464,ekpid: 1872982390
eprocname:
estarttime.dtdays: 42350,estarttime.dttime: 11849873
estoptime.dtdays: 42347,estoptime.dttime: 13839207
epaffinitied: 36,eprunnableqs: 0x0x2aaae2a0ace0
eprunnable: 0,epschedflags: 0x441
epmaxscheds: 0,epscheduler: 0x0x2aad13f81a10
eplastkpid: 1564294270,epkcheck: 0
 
sig11_memdump.Dec_19_00_56:dump> kproc 1872982390
kpid 1872982390 slot id 29046 procp 0x0x00002aad13f81a10
status=running(engine 52) scheduler
 
prkpid=1872982390, prpri=0, prsubpri=2, prnotrun=0, prkiller=0
prpdata=0x(nil), prpaddr=0x(nil), prengine=52,  affinity=ANY
 
******** Stack trace for kpid: 1872982390
pc: (nil) ()
        Frame Pointer= 0x00007fffffffbfe0 , Frame size=-740302480
******** End of stack trace, kernel service process: kpid 1872982390
 
50 24030  1855020510 kpsched        running(engine 50) scheduler 
51 24258  1872191170 kpsched        running(engine 51) scheduler 
53 24020  1873501652 kpsched        running(engine 53) scheduler 
Missing engine 52.

• SAP Adaptive Server Enterprise (ASE) 15.7
• Threaded kernel mode

CR793978, CR#793978, 793978, OpenLDAP, CR794040, CR#794040, 794040 , KBA , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , Bug Filed