iommu/vt-d: Fix sysfs leak in alloc_iommu()
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.12.9 by commit ca466561eef36d1ec657673e3944eb6340bddb5b, it was introduced in version v4.11 by commit 39ab9555c24110671f8dc671311a26e5c985b592. For more details please see the references link.