diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 0027d8f4a1bb8b1423f42e4d52cb3547debc315f..21c272d517bc45a787de56bc7218d7581a3603d2 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -5414,6 +5414,17 @@ __count_immobile_pages(struct zone *zone, struct page *page, int count) bool is_pageblock_removable_nolock(struct page *page) { struct zone *zone = page_zone(page); + unsigned long pfn = page_to_pfn(page); + + /* + * We have to be careful here because we are iterating over memory + * sections which are not zone aware so we might end up outside of + * the zone but still within the section. + */ + if (!zone || zone->zone_start_pfn > pfn || + zone->zone_start_pfn + zone->spanned_pages <= pfn) + return false; + return __count_immobile_pages(zone, page, 0); }