3550356 - Child worker process spids encounter signal 11 in routine ubffreef - SAP ASE

• ASE errorlog reports a burst of spids hitting a signal 11 at address ubffreef
• The affected spids are child / worker processes (WP)
  
  • As there are many intertwined log records for each WP, the error sequence in the log is long and difficult to read
    
    
• A somewhat cleaned up example of ASE log records looks like :
  • with Parent_spid:Child_spid are highlighted in this way:
    
    00:0016:03291:04888:2024/11/09 11:08:35.54 kernel  Address 0x0000000102462c58 (ubffreef+0x170), siginfo (code, address) = (50, 0x0000000045435461)
    00:0009:03291:04478:2024/11/09 11:08:35.55 kernel  Address 0x0000000102462c30 (ubffreef+0x148), siginfo (code, address) = (50, 0x415356494e474f1c)
    00:0010:03291:03259:2024/11/09 11:08:35.54 kernel  Address 0x0000000102462c30 (ubffreef+0x148), siginfo (code, address) = (50, 0x0b5a494e57412069)
    ...
    00:0016:03291:04888:2024/11/09 11:08:35.55 kernel  Current process (0x270f1388) infected with signal 11 (SIGSEGV)
    00:0009:03291:04478:2024/11/09 11:08:35.54 kernel  Current process (0x26f3137a) infected with signal 11 (SIGSEGV)
    00:0010:03291:03259:2024/11/09 11:08:35.54 kernel  Current process (0x27111389) infected with signal 11 (SIGSEGV)
    
    and each spid has a stack trace including routines
    
    ubffreef
    LeMJOp::_LeOpRelease
    s_result_const_memfree
    kw_exec
    

SAP Adaptive Server Enterprise (ASE) 16.0 SP03 & SP04

KBA , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , Bug Filed