From: luofei <luofei@xxxxxxxxxxxx> Subject: mm/hwpoison: add in-use hugepage hwpoison filter judgement After successfully obtaining the reference count of the huge page, it is still necessary to call hwpoison_filter() to make a filter judgement, otherwise the filter hugepage will be unmaped and the related process may be killed. Link: https://lkml.kernel.org/r/20220223082254.2769757-1-luofei@xxxxxxxxxxxx Signed-off-by: luofei <luofei@xxxxxxxxxxxx> Reviewed-by: Miaohe Lin <linmiaohe@xxxxxxxxxx> Cc: Borislav Petkov <bp@xxxxxxxxx> Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx> Cc: H. Peter Anvin <hpa@xxxxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxxxxx> Cc: Naoya Horiguchi <naoya.horiguchi@xxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Cc: Tony Luck <tony.luck@xxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/memory-failure.c | 8 ++++++++ 1 file changed, 8 insertions(+) --- a/mm/memory-failure.c~mm-hwpoison-add-in-use-hugepage-hwpoison-filter-judgement +++ a/mm/memory-failure.c @@ -1534,6 +1534,14 @@ static int memory_failure_hugetlb(unsign lock_page(head); page_flags = head->flags; + if (hwpoison_filter(p)) { + if (TestClearPageHWPoison(head)) + num_poisoned_pages_dec(); + put_page(p); + res = -EOPNOTSUPP; + goto out; + } + /* * TODO: hwpoison for pud-sized hugetlb doesn't work right now, so * simply disable it. In order to make it work properly, we need _
