[libvirt] [Bug] To long backingchain does not work (3 and more...)

[Xen Mann]

Hey there!

I'm experiencing a strange behavior with libvirt and backing chains.
Getting higher than the first overlay results in a permission denied to the base image and I can't start any machine.


# Results while attempting to start machine

    (after every attemt the whole files from ./houseBackup are restored)
    Base.img        (ok - Win 10 Installation starting)
    FirstFloor.ovl  (ok - Win 10 Installation starting)
    SecondFloor.ovl (permission denied -> Base.img) => assumed Bug
    Roof.ovl        (permission denied -> Base.img) => assumed Bug

The bug is described in detail here together with a minimal example.
But maybe I'm still doing something wrong and somebody can give me a heads up =).

https://bugzilla.redhat.com/show_bug.cgi?id=1588373

Thx,
yours Xensemann!