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 v4.19.193 by commit 2ec5e9bb6b0560c90d315559c28a99723c80b996, it was introduced in version v4.11 by commit 39ab9555c24110671f8dc671311a26e5c985b592. For more details please see the references link.