mm, hugetlb: fix simple resvhugepages underflow on UFFDIO_COPY
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 v4.19.194 by commit 7de60c2d5a2a66ef2c5d76952a5a3a9a4ea4d436, it was introduced in version v4.11 by commit 8fb5debc5fcd450470cdd789c2d80ef95ebb8cf4. For more details please see the references link.