2835051 - Infected with signal 11 in ssql_lookup with server crash due to SSQLCACHE_SPIN spinlock - SAP ASE 16.0

• A client connection is unexpectedly terminated.
• Infected with signal 11" error in the module ssql_lookup() together with a stack trace is reported in the ASE errorlog:

Current process (0x88b0446) infected with signal 11 (SIGSEGV)
Address 0x0x0000000001052f5e (ssql_lookup+0x43c), siginfo (code, address) = (1, 0x0x000000000000004e)

• The stack trace includes the following functions:

ssql_lookup
sqt_get_from_stmtcache
s__xoltp_dynprepare

or

ssql_lookup
s_xform_to_execute
s_normalize

   Note: A complete stack trace example of the first instance is available under Attachments.

• ASE then shuts down due to infected process holding spinlock SSQLCACHE_SPIN:

Spinlocks held by kpid 143328326
Spinlock SSQLCACHE_SPIN at address 0x00002aaaafb0bd00 owned by 143328326

SAP Adaptive Server Enterprise (ASE) 16.0

Sybase, infected, signal, SEGV, segment violation, storage access violation, kisignal, CR819729, CR#819729, 819729 , KBA , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , BC-DB-SYB , Business Suite on Adaptive Server Enterprise , BC-SYB-ASE-CE , ASE Cluster Edition (Standalone) , Bug Filed