hugetlb: pass head page to remove_hugetlb_page()
When memory_failure() or soft_offline_page() is called on a tail page of some hugetlb page, "BUG: unable to handle page fault" error can be triggered. remove_hugetlb_page() dereferences page->lru, so it's assumed that the page points to a head page, but one of the caller, dissolve_free_huge_page(), provides remove_hugetlb_page() with 'page' which could be a tail page. So pass 'head' to it, instead. Link: https://lkml.kernel.org/r/20210526235257.2769473-1-nao.horiguchi@gmail.com Fixes: 6eb4e88a ("hugetlb: create remove_hugetlb_page() to separate functionality") Signed-off-by: Naoya Horiguchi <naoya.horiguchi@nec.com> Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com> Reviewed-by: Muchun Song <songmuchun@bytedance.com> Acked-by: Michal Hocko <mhocko@suse.com> Reviewed-by: Oscar Salvador <osalvador@suse.de> Cc: Miaohe Lin <linmiaohe@huawei.com> Cc: Matthew Wilcox <willy@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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