CVE-2025-39811

In the Linux kernel, the following vulnerability has been resolved:

drm/xe/vm: Clear the scratch_pt pointer on error

Avoid triggering a dereference of an error pointer on cleanup in
xe_vm_free_scratch() by clearing any scratch_pt error pointer.

(cherry picked from commit 358ee50ab565f3c8ea32480e9d03127a81ba32f8)