diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c
index b209712cb2c3..a893d48e770d 100644
--- a/kernel/power/snapshot.c
+++ b/kernel/power/snapshot.c
@@ -1256,7 +1256,10 @@ static void mark_free_pages(struct zone *zone)
 
 	max_zone_pfn = zone_end_pfn(zone);
 	for_each_valid_pfn(pfn, zone->zone_start_pfn, max_zone_pfn) {
-		page = pfn_to_page(pfn);
+		page = pfn_to_online_page(pfn);
+
+		if (!page)
+			continue;
 
 		if (!--page_count) {
 			touch_nmi_watchdog();