CVE-2024-53098 drm/xe/ufence: Prefetch ufence addr to catch bogus address

In the Linux kernel, the following vulnerability has been resolved: drm/xe/ufence: Prefetch ufence addr to catch bogus address accessok only checks for addr overflow so also try to read the addr to catch invalid addr sent from userspace. cherry picked from commit...

CVE-2024-53098

CVE-2024-53098 affects the Linux kernel DRM XE ufence path. The root cause is that access_ok() only checks for addr overflow and may also read the user-supplied address to catch invalid addresses, coupled with prefetching ufence addresses to detect bogus ones. The issue is remedied by a kernel fi...