2947966 - Infected with 11 (SIGSEGV) in mbkt_do_alloc - SAP ASE

• Client connection unexpectedly terminated
• ASE errorlog contains an infected with 11 error at address mbkt_do_alloc
  
  Current process (0x4ffd0136) infected with signal 11 (SIGSEGV)
  Address 0x0x0000000002216727 (mbkt_do_alloc+0x927) ...
  
  
• with a stack trace that includes the following functions:
  
  mbkt_do_alloc
  ubfallocf
  varpkt_alloc_with_retry
  usincpktsz
  login_varpktsz
  
  
• Subsequently ASE reports many more of this signal 11 or, more commonly, many instances of a timeslice, with its own stacktrace
  
  timeslice -1501, current process infected at 0x2249cb7 (pausenonatomic+0x9)
  timeslice error: spid 12345 exhausted its 'time slice' of 100 milliseconds and additional 'cpu grace time' of 1500 ticks (150000 milliseconds). It has been marked for termination.

  (null)
  mbkt__free
  usdfltpktsz

  
  Note: A complete example of the stack trace is available under Attachments in file KBA_2947966_Full_Example.txt

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SAP Adaptive Server Enterprise (ASE) 16.0

SAP Adaptive Server Enterprise 12.5 ; SAP Adaptive Server Enterprise 15.7 ; SAP Adaptive Server Enterprise 15.7 Cluster Edition ; SAP Adaptive Server Enterprise 16.0 ; Sybase Adaptive Server Enterprise 12.5 ; Sybase Adaptive Server Enterprise 15.0 ; Sybase Adaptive Server Enterprise 15.5 ; Sybase Adaptive Server Enterprise Cluster Edition 15.0 ; Sybase Adaptive Server Enterprise Cluster Edition 15.5 ; Sybase Adaptive Server Enterprise Cluster Edition 15.7

Sybase, infected, signal, SEGV, SIGSEGV, segment violation, storage access violation, kisignal , KBA , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , Bug Filed