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2148437 - Signal 10 (SIGBUS) at module ubofree - SAP ASE

Symptom

  • User session terminates unexpectedly.
  • ASE shuts down unexpectedly.
  • A running sp_sysmon is in progress.  
  • ASE errorlog contains a message 'infected with signal 10' at the module ubofree():

Current process (hex#) infected with signal 10 (SIGBUS)
Address hex# (ubofree+0x220)

  • This messages can be seen in the errorlog:

       ulreleasespinlock: spinlock being freed improperly
                 
  • With a stacktrace containing the following functions:

ubofree
keipanic
ulreleasespinlock
ksfreesocket
soc_nclose
drop_connection
            
OR
                    
ubofree
ups_disable_hashstats_parallelism
cri_ptn_index
cri_physbuild

  • A terminated user process left a phantom spinlock behind:

Spinlock Kernel Spinlock Spinlock at address hex# owned by 123456789


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Environment

  • SAP Adaptive Server Enterprise (ASE) 15.7
  • SAP Adaptive Server Enterprise (ASE) 16.0

Product

SAP Adaptive Server Enterprise 15.7 ; SAP Adaptive Server Enterprise 16.0

Keywords

disconnect, network, connection, "bus error",  memory, CR767385, CR#767385, 767385, kisignal, stack, trace, registers, CR767385, CR#767385, 767385 , 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

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