CVE-2026-68305 drm/xe/vf: Add drm_dev guards when detaching CCS read/write buffers

In the Linux kernel, the following vulnerability has been resolved: drm/xe/vf: Add drmdev guards when detaching CCS read/write buffers CCS read/write buffers are freed during BO destruction. In some cases, BOs may be destroyed after the device is unbound but while the DRM structure remains valid,...