CVE-2025-39811 drm/xe/vm: Clear the scratch_pt pointer on error

In the Linux kernel, the following vulnerability has been resolved: drm/xe/vm: Clear the scratchpt pointer on error Avoid triggering a dereference of an error pointer on cleanup in xevmfreescratch by clearing any scratchpt error pointer. cherry picked from commit...

SUSE CVE-2025-38309

In the Linux kernel, the following vulnerability has been resolved: drm/xe/vm: move xesvminit earlier In xevmcloseandput we need to be able to call xesvmfini, however during vm creation we can call this on the error path, before having actually initialised the svm state, leading to various splats...