An issue was discovered in the Linux kernel 4.18 through 5.10.16, as used by Xen. The backend allocation (aka be-alloc) mode of the drm_xen_front drivers was not meant to be a supported configuration, but this wasn't stated accordingly in its support status entry.
| Software | From | Fixed in |
|---|---|---|
| linux / linux_kernel | 4.18 | 5.10.16.x |
| fedoraproject / fedora | 32 | 32.x |
| fedoraproject / fedora | 33 | 33.x |