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2021947 - Signal 11 in th_curunreservedpg() when ALTER DATABASE and "curunreservedpgs" run concurrenly - SAP ASE 15.7

Symptom

  • Receive "Infected with signal 11" in the th_curunreservedpgs() module with stacktrace:

Current process (0x74b901b0) infected with signal 11 (SIGSEGV)
Address 0x0x0000000000e305f9 (th_curunreservedpgs+0x131), siginfo (code, address) = (1, 0x(nil))

  •  The following is running concurrently:
     
    • ALTER DATABASE
    • Using the "curunreservedpgs" Trasact-SQL Function
       
  • Modules seen on the ASE stacktrace include: 

th_curunreservedpg()
LeRun()
exec_lava()

  • This error may be followed by multiple timeslice errors in the module atomic_try().

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Environment

SAP Adaptive Server Enterprise (ASE) 15.7

Product

SAP Adaptive Server Enterprise 15.7

Keywords

CR#725810, CR725810, 725810, CR#727310, CR727310 , 727310, SEGV, segmentation, storage, access, violation, fault, segfault, kisignal, stacktrace,  stack, registers , KBA , memory corruption , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , BC-DB-SYB , SAP Business Suite on Sybase ASE Database Platform , Bug Filed

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