CVE-2025-38673 Revert "drm/gem-framebuffer: Use dma_buf from GEM object instance"

In the Linux kernel, the following vulnerability has been resolved: Revert "drm/gem-framebuffer: Use dmabuf from GEM object instance" This reverts commit cce16fcd7446dcff7480cd9d2b6417075ed81065. The dmabuf field in struct drmgemobject is not stable over the object instance's lifetime. The field...