Get_hwpoison_page() must recheck relation between head and tail pages. Signed-off-by: Konstantin Khlebnikov <khlebni...@yandex-team.ru> --- mm/memory-failure.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/mm/memory-failure.c b/mm/memory-failure.c index 78f5f2641b91..ca5acee53b7a 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -888,7 +888,15 @@ int get_hwpoison_page(struct page *page) } } - return get_page_unless_zero(head); + if (get_page_unless_zero(head)) { + if (head == compound_head(page)) + return 1; + + pr_info("MCE: %#lx cannot catch tail\n", page_to_pfn(page)); + put_page(head); + } + + return 0; } EXPORT_SYMBOL_GPL(get_hwpoison_page);