CVE-2026-68245 drm/amdgpu: fix lifetime issue of amdgpu_vm_get_task_info_pasid()

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: fix lifetime issue of amdgpuvmgettaskinfopasid The vm pointer returned from amdgpuvmgetvmfrompasid is only valid while the lock is still being held. Once xaunlockirqrestore is called and returned, the pointer is no...