CVE-2026-98520 drm/amdkfd: fix use-after-free and multi-container gap in kfd_dev_mapping

In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: fix use-after-free and multi-container gap in kfddevmapping kfddevmapping caches the addressspace of the first /dev/kfd opener so that the GPU reset path can call unmapmappingrange to zap all userspace mappings of...