INFORMIX SERVER / 5725A3900 / C10 - IDS 12.10

This problem was originally reported by customer running
12.10.FC6 on aix64.  The
repro I developed also dupes the problem on 12.10.FC12 on linux
x86_64.

A client that attempts an ipcshm connection and dies quickly can
cause the sm_discon
thread to fail with asserts like these below:

    08:28:33  Assert Failed: Invalid Mutex Type
    08:28:33   Who: Session(5, informix@, 0, (nil))
                    Thread(10, sm_discon, 0, 9)
                    File: mt_fn.c Line: 8885
    08:28:33  Stack for thread: 10 sm_discon

     base: 0x0000000045c8f000
      len:   69632
       pc: 0x0000000001bbb9af
      tos: 0x0000000045c9ef40
    state: running
       vp: 9

    0x0000000001bbb9af (oninit) afstack
    0x0000000001bb9a47 (oninit) afhandler
    0x0000000001bb8d7d (oninit) afcrash_interface
    0x0000000001be150e (oninit) mt_check_mutex
    0x0000000001be1cbb (oninit) mt_lock_helper
    0x0000000001be1c54 (oninit) mt_lock
    0x0000000001e17c16 (oninit) sigclient_dead
    0x0000000001e17bc8 (oninit)
net_sm_discon_thread_free_statinfo
    0x0000000001e1779b (oninit) net_sm_discon_thread
    0x0000000001c28e6d (oninit) startup

My repro also reported generated a segv assertion:

    16:14:15  Assert Failed: No Exception Handler
    16:14:15   Who: Session(5, informix@, 0, (nil))
                    Thread(10, sm_discon, 0, 1)
                    File: mtex.c Line: 508
    16:14:15   Results: Exception Caught. Type: MT_EX_OS,
Context: mem
    16:14:15   Action: Please notify IBM Informix Techical
Support.

    16:14:15  Stack for thread: 10 sm_discon

     base: 0x0000000045c29000
      len:   69632
       pc: 0x0000000001b405c6
      tos: 0x000000004468b3b0
    state: running
       vp: 1

    0x0000000001b405c6 (oninit) afstack
    0x0000000001b435cd (oninit) mt_ex_throw_sig
    0x0000000001b5abbb (oninit) afsig_handler
    0x0000003ddfa0e4c0 (Linux) 
    0x0000000001b7b5da (oninit) mt_signal
    0x0000000001d95c76 (oninit) sigclient_dead
    0x0000000001d95c0d (oninit)
net_sm_discon_thread_free_statinfo
    0x0000000001d957e0 (oninit) net_sm_discon_thread
    0x0000000001c02c06 (oninit) startup

****************************************************************
* USERS AFFECTED:                                              *
* Users of IDS prior to 12.10.xC13.                            *
****************************************************************
* PROBLEM DESCRIPTION:                                         *
* A client that attempts an ipcshm connection and dies quickly *
* can cause the sm_discon                                      *
* thread to Assert Fail.                                       *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************

not known / see Local fix

Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :

25.04.2019
26.09.2019
26.09.2019

12.10.xC13