drm/virtio: fix NULL pointer dereference in virtiogpuconngetmodes
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.17.14 by commit c51d00472fa54b9b05c17789ed665c17adf3a25d. For more details please see the references link.