2414647 - Signal 11 in lock__draincache or lock__fillcache_work results in server crash - SAP ASE

• A system which runs on SAP ASE database suddenly crashes.
• A corresponding error in the ASE errorlog is a signal 11 (SIGSEGV) in the module lock__draincache() or lock__fillcache_work():
  
  
• Current process (...) infected with signal 11 (SIGSEGV) 
  Address 0x0x0000000000ea6b2f (lock__draincache+0x8f)
  
  followed by a stack trace referencing functions:
   
  lock__draincache
  lock_release 
  do_bt_release_rlocks
  bt__splitleaf 
  bt__insert_into_leaf
   
  Note: A complete stack trace is available under Attachments.
   
• Current process (...) infected with signal 11 (SIGSEGV) 
  Address 0x0x0000000000e19778 (lock__fillcache_work+0x158)
   
  followed by a stack trace referencing functions:
   
  lock__fillcache_work
  lock__fillcache 
  lock_do_logical

• The terminated processes (sid) hit this signal 11 when holding spinlock rlockobjpool_spin, hence ASE crashes:

Spinlocks held by kpid 12345678 
Spinlock Resource->rlockobjpool_spin

• SAP Adaptive Server Enterprise (ASE) 15.7 and 16.0 for Business Suite
• SAP Adaptive Server Enterprise (ASE) 15.7 and 16.0

CR804839, CR#804839, 804839, SEGV, segmentation, storage, access, violation, fault, segfault, kisignal, stacktrace,  registers , KBA , BC-DB-SYB , Business Suite on Adaptive Server Enterprise , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , BW-SYS-DB-SYB , BW on Adaptive Server Enterprise , Bug Filed