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2492271 - Signal 11 in ssql modules - SAP ASE

Symptom

  • ASE errorlog reports "infected with signal 11" error in modules starting with ssql:

Current process (0x4f430638) infected with signal 11 (SIGSEGV)
Address 0x0x0000000000e992c2 (ssql(bool, float, float, long double,...)(...) __restrict+0x3d), siginfo (code, address) = (1, 0x0x0000000000000004)

or
 
Address 0x00000000812f65c0 (ssql__ubffree+0x2c), siginfo (code, address) = (1, 0x0x00000000000000..)

  • Followed by a stack trace that includes modules:

ssql__rmplans
ssql_save_SQL
sqt_put_in_stmtcache

   Note: A sample of a complete stack trace is available under Attachments.

  • These may be followed by further "infected with signal 11" error in the module ssql_droptext() that can crash ASE:

Current process (0x1bc33a4a) infected with signal 11 (SIGSEGV)
Address 0x0x0000000000e93233 (ssql_droptext+0x970), siginfo (code, address) = (1, 0x0x0000000000000082)

  • Showing stack trace including modules:

ssql_droptext
ssql_purge_stmt_hastemp
clean_process 

  • As this process is holding SSQLCACHE_SPIN, ASE will go down showing log entries including:

Spinlocks held by kpid 12345678
Spinlock SSQLCACHE_SPIN at address ....


Read more...

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

CR806726, CR#806726, 806726, SEGV, segmentation, storage, access, violation, fault, segfault, kisignal, stacktrace, registers , KBA , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , Bug Filed

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