INFORMIX SERVER / 5725A3900 / C10 - IDS 12.10

mt_prscblst had mt_ex_catch that only handles unlock of
ses_seslatch, but can lock scb->threadlatch temporarily.
Also, mt_nxtscb temporary (and unnecessarily locks
scb->threadlatch), but doesn't check the returned scb for
SCB_CLEANUP in all cases.

For sake of searchability, addiing an example of what the
scb->threadlatch looks like in an onstat -g lmx
output since the mutex has a unique name, scbthd.  This
particular example shows the holder 858 waiting
on itself for the mutex which is what can happen when this
defect surfaces.

Locked mutexes:
mid         addr                     name               holder
lkcnt  waiter   waittime
14737    700000575a32028  scbthd             858      0      858
3573
17          70000001f730038  session            858      0
33       3573

****************************************************************
* USERS AFFECTED:                                              *
* Users of IDS prior to 12.10.xC13.                            *
****************************************************************
* PROBLEM DESCRIPTION:                                         *
* Potential for MT_EX_OS catch to leave scb->threadlatch mutex *
* locked.                                                      *
****************************************************************
* RECOMMENDATION:                                              *
* Upgrade to Informix Server 12.10.xC13 or 14.10.xC1.          *
****************************************************************

keiner bekannt / siehe Local-Fix

Datum - Problem gemeldet    :
Datum - Problem geschlossen :
Datum - der letzten Änderung:

27.12.2018
04.12.2019
04.12.2019

12.10.xC13,
14.10.xC1