On Fri, 7 Jul 2023 11:38:59 +0800 Muchun Song <songmuchun@xxxxxxxxxxxxx> wrote: > The local variable @page in __split_vmemmap_huge_pmd() to obtain a pmd > page without holding page_table_lock may possiblely get the page table > page instead of a huge pmd page. The effect may be in set_pte_at() > since we may pass an invalid page struct, if set_pte_at() wants to > access the page struct (e.g. CONFIG_PAGE_TABLE_CHECK is enabled), it > may crash the kernel. So fix it. And inline __split_vmemmap_huge_pmd() > since it only has one user. Is this likely enough to justify a backport? I'm thinking "add cc:stable and merge into 6.6-rc1", so it hits -stable after a couple of months of testing.
