virt-manager unable to pick ISO from user home folder

[roworu]

Describe the bug

1. I enabled virtualization using:

ujust setup-virtualization
-> Enable Virtualization
-> Add $USER to libvirt group

2. Did a reboot, then downloaded an ISO I want to install in a VM:

roworu@bazzite ~/Downloads> ls -lh
total 3.5G
-rw-r--r--. 1 roworu roworu 3.5G Jan 10 13:33 Fedora-Kinoite-ostree-x86_64-41-1.4.iso

3. Open a virt-manager, pick QEMU/KVM conneection and click new
4. Pick an ISO from above
5. Leave all other options by default and click "Finish" on last step
6. Got this error:

Full text:

Unable to complete install: 'internal error: process exited while connecting to monitor: 2025-01-10T11:40:45.447613Z qemu-system-x86_64: -blockdev {"driver":"file","filename":"/home/roworu/Downloads/Fedora-Kinoite-ostree-x86_64-41-1.4.iso","node-name":"libvirt-1-storage","read-only":true}: Could not open '/home/roworu/Downloads/Fedora-Kinoite-ostree-x86_64-41-1.4.iso': Permission denied'

Traceback (most recent call last):
  File "/app/share/virt-manager/virtManager/asyncjob.py", line 71, in cb_wrapper
    callback(asyncjob, *args, **kwargs)
  File "/app/share/virt-manager/virtManager/createvm.py", line 2008, in _do_async_install
    installer.start_install(guest, meter=meter)
  File "/app/share/virt-manager/virtinst/install/installer.py", line 726, in start_install
    domain = self._create_guest(
             ^^^^^^^^^^^^^^^^^^^
  File "/app/share/virt-manager/virtinst/install/installer.py", line 667, in _create_guest
    domain = self.conn.createXML(initial_xml or final_xml, 0)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/app/lib/python3.12/site-packages/libvirt.py", line 4545, in createXML
    raise libvirtError('virDomainCreateXML() failed')
libvirt.libvirtError: internal error: process exited while connecting to monitor: 2025-01-10T11:40:45.447613Z qemu-system-x86_64: -blockdev {"driver":"file","filename":"/home/roworu/Downloads/Fedora-Kinoite-ostree-x86_64-41-1.4.iso","node-name":"libvirt-1-storage","read-only":true}: Could not open '/home/roworu/Downloads/Fedora-Kinoite-ostree-x86_64-41-1.4.iso': Permission denied

Also, I can see, that after this error, permissions for ISO file changed to these:

roworu@bazzite ~/Downloads> ls -lh
total 3.5G
-rw-r--r--. 1 qemu qemu 3.5G Jan 10 13:33 Fedora-Kinoite-ostree-x86_64-41-1.4.iso

What did you expect to happen?

I expected, that virt-manager can pick up ISO images from home folder and create VMs based ont hem without any issues.

Output of rpm-ostree status

roworu@bazzite ~> rpm-ostree status
State: idle
Deployments:
● ostree-image-signed:docker://ghcr.io/ublue-os/bazzite-nvidia-open:stable
                   Digest: sha256:e366fc496bcbb3c0af90081272505fe2f917f1e4c10dac07712b8c49642023a4
                  Version: 41.20250106.3 (2025-01-07T04:27:03Z)
                Initramfs: regenerate

  ostree-image-signed:docker://ghcr.io/ublue-os/bazzite-nvidia-open:stable
                   Digest: sha256:e366fc496bcbb3c0af90081272505fe2f917f1e4c10dac07712b8c49642023a4
                  Version: 41.20250106.3 (2025-01-07T04:27:03Z)

Hardware

Desktop PC with Nvidia GPU

Extra information or context

Please, tell if I could provide any additional information to help resolving the issue