CVE-2022-50285

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> mm,hugetlb: take hugetlb_lock before decrementing h-&gt;resv_huge_pages<br /> <br /> The h-&gt;*_huge_pages counters are protected by the hugetlb_lock, but<br /> alloc_huge_page has a corner case where it can decrement the counter<br /> outside of the lock.<br /> <br /> This could lead to a corrupted value of h-&gt;resv_huge_pages, which we have<br /> observed on our systems.<br /> <br /> Take the hugetlb_lock before decrementing h-&gt;resv_huge_pages to avoid a<br /> potential race.