filing patches upstream (legal)

[Niclas Rosenvik <nros%NetBSD.org@localhost>]

Hi everyone. I have filed patches from x11/qt5-qtbase that I am the
creator of to the qt project. I would like to send other patches from
this package upstream. The problem is that they aren't mine and I don't
want to breach any copyright on these patches.
QT has a cla[1] where one licenses the contributed code to the qt
project.
What do the creators of these patches think about sending their
patches upstream? (I hope they read this list)
Some of them are just "defined(__NetBSD__)" here and there.
From a copyright perspective, is it okay for me to send these patches
upstream?

/Niclas Rosenvik

1. https://codereview.qt-project.org/static/cla_individual.html