On Thu, May 27, 2021 at 08:52:57AM +0900, Naoya Horiguchi wrote: > From: Naoya Horiguchi <naoya.horiguchi@xxxxxxx> > > 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. I'd like to point out that with folios, this is a compile-time error, not a run-time error.
