---

yaml
---
r: 286594
b: refs/heads/master
c: 687875f
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 6536e3123e5d3371a6f52e32a3d0694bcc987702
+refs/heads/master: 687875fb7de4a95223af20ee024282fa9099f860

trunk/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);
 }