DB2 FOR LUW / DB2FORLUW / B50 - DB2

The logic used to fix IT13674 (the underlying DB2 defect) used
grep -w, or similar, which is insufficient when /tmp is
overmounted with a different filesystem with correct parameters.

WHY LOCAL FIX DOES NOT WORK:
Due to /etc/mtab being a link to /proc/self/mounts, it is not
directly editable.
Due to /tmp being in use, it cannot be force unmounted twice in
order to work around this.
A remount will not work, because the top level mount is valid
already, and the db2setup checks for this simply do not notice
it.
The last entry in mtab is the one that actually is in use.
mtab is a link to /proc, so that is not editable


APAR FIX:
[root@azesp01b01 install]# pwd
/sp/software/816srv/repository/native/1/ese/db2/linuxamd64/insta
ll
[root@azesp01b01 install]# diff db2setup db2setup.old
137c137
< foundit=`mount | grep -w ${TMPDIR?} | tail -1 | grep "noexec"
2> /dev/null`
---
> foundit=`mount | grep -w ${TMPDIR?} | grep "noexec" 2>
/dev/null`

****************************************************************
* USERS AFFECTED:                                              *
* all                                                          *
****************************************************************
* PROBLEM DESCRIPTION:                                         *
* See Error Description                                        *
****************************************************************
* RECOMMENDATION:                                              *
* Upgrade to Db2 11.5.5.0 or higher                            *
****************************************************************

not known / see Local fix

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

28.07.2020
20.11.2020
20.11.2020