CVE-2024-46866 drm/xe/client: add missing bo locking in show_meminfo()

In the Linux kernel, the following vulnerability has been resolved: drm/xe/client: add missing bo locking in showmeminfo bomeminfo wants to inspect bo state like tt and the ttm resource, however this state can change at any point leading to stuff like NPD and UAF, if the bo lock is not held. Grab...

CVE-2024-46866

CVE-2024-46866 is a Linux kernel DRM-XE issue: bo_meminfo() can inspect bo state (tt/ttm) without holding the bo lock, allowing state changes that may cause NPD or UAF. The fix grabs the bo lock during bo_meminfo() and adds a ref for object_idr; v2 also introduces xe_bo_assert_held(). Concrete de...