diff --git a/mm/page_owner.c b/mm/page_owner.c
index c6cda3e..fedeba8 100644
--- a/mm/page_owner.c
+++ b/mm/page_owner.c
@@ -207,13 +207,15 @@
 		.nr_entries = page_ext->nr_entries,
 		.entries = &page_ext->trace_entries[0],
 	};
-	gfp_t gfp_mask = page_ext->gfp_mask;
-	int mt = gfpflags_to_migratetype(gfp_mask);
+	gfp_t gfp_mask;
+	int mt;
 
 	if (unlikely(!page_ext)) {
 		pr_alert("There is not page extension available.\n");
 		return;
 	}
+	gfp_mask = page_ext->gfp_mask;
+	mt = gfpflags_to_migratetype(gfp_mask);
 
 	if (!test_bit(PAGE_EXT_OWNER, &page_ext->flags)) {
 		pr_alert("page_owner info is not active (free page?)\n");