Forwarded: [PATCH v1] Poisend page in hibernation

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Subject: [PATCH v1] Poisend page in hibernation
Author: nsvatoslav515@xxxxxxxxx

#syz test

Signed-off-by: Svyatoslav Nikolenko <nsvatoslav515@xxxxxxxxx>
---
 kernel/power/snapshot.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

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();
-- 
2.47.3