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3089377 - Signal 11 in senddone() after deadlock on a cursor fetch - SAP ASE

Symptom

  • A user connection dies unexpectedly.
  • The ASE errorlog contains a signal 11 error in the module senddone() followed by a stack trace:

  • Current process (0x1f23082a) infected with signal 11 (SIGSEGV)
    Address 0x0x000000000185ca7b (senddone+0xc2b), siginfo (code, address) = (1, 0x0x00000000deadbbae)

  • Stack trace includes functions: 

senddone
s_cleanframe
exc__raise
...
curs_fetch 
   or
curs_open

Note: A full stack trace is available under Attachments.

  • Checking the values of the registers in the "Saved signal context" area of the stacktrace in the errorlog one (probably RAX) will contain the value 0x00000000deadbabe.


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Environment

  • SAP Adaptive Server Enterprise (ASE) 
  • SAP Adaptive Server Enterprise Cluster Edition (ASE CE) 

Product

SAP Adaptive Server Enterprise 15.7 ; SAP Adaptive Server Enterprise 15.7 Cluster Edition ; SAP Adaptive Server Enterprise 16.0 ; SAP Adaptive Server Enterprise 16.0 Cluster Edition

Keywords

Sybase, ASEServer, SAPASE, dataserver, CR825404, CR#825404, SEGV, segmentation, storage, access, violation, fault, segfault, kisignal, stacktrace,  registers , KBA , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , BC-SYB-ASE-CE , ASE Cluster Edition (Standalone) , Bug Filed

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