Flooded by dbus-daemon

[Mark81]

On my ARM target, whenever I launch my application from QtCreator 4.10.0 even not in debugging session, it creates 3 processes like these:

/usr/bin/dbus-daemon --syslog --fork --print-pid 4 --print-address 6 --session
/usr/bin/dbus-daemon --syslog --fork --print-pid 4 --print-address 6 --session
/usr/bin/dbus-daemon --syslog --fork --print-pid 4 --print-address 6 --session

They stay there even when the application exits.
After a day of development I end with hundreds of such a process that fills up all the available resources making the target unresponsive.

How to fix it?