diff --git a/mm/vmscan.c b/mm/vmscan.c
index 031fbd35ae10..6f3f9e20ff67 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -3440,8 +3440,10 @@ static struct folio *get_pfn_folio(unsigned long pfn, struct mem_cgroup *memcg,
 	if (folio_nid(folio) != pgdat->node_id)
 		return NULL;
 
+	rcu_read_lock();
 	if (folio_memcg(folio) != memcg)
-		return NULL;
+		folio = NULL;
+	rcu_read_unlock();
 
 	return folio;
 }
@@ -4211,12 +4213,12 @@ bool lru_gen_look_around(struct page_vma_mapped_walk *pvmw, unsigned int nr)
 	unsigned long addr = pvmw->address;
 	struct vm_area_struct *vma = pvmw->vma;
 	struct folio *folio = pfn_folio(pvmw->pfn);
-	struct mem_cgroup *memcg = folio_memcg(folio);
+	struct mem_cgroup *memcg;
 	struct pglist_data *pgdat = folio_pgdat(folio);
-	struct lruvec *lruvec = mem_cgroup_lruvec(memcg, pgdat);
-	struct lru_gen_mm_state *mm_state = get_mm_state(lruvec);
-	DEFINE_MAX_SEQ(lruvec);
-	int gen = lru_gen_from_seq(max_seq);
+	struct lruvec *lruvec;
+	struct lru_gen_mm_state *mm_state;
+	unsigned long max_seq;
+	int gen;
 
 	lockdep_assert_held(pvmw->ptl);
 	VM_WARN_ON_ONCE_FOLIO(folio_test_lru(folio), folio);
@@ -4251,6 +4253,12 @@ bool lru_gen_look_around(struct page_vma_mapped_walk *pvmw, unsigned int nr)
 		}
 	}
 
+	memcg = get_mem_cgroup_from_folio(folio);
+	lruvec = mem_cgroup_lruvec(memcg, pgdat);
+	max_seq = READ_ONCE((lruvec)->lrugen.max_seq);
+	gen = lru_gen_from_seq(max_seq);
+	mm_state = get_mm_state(lruvec);
+
 	lazy_mmu_mode_enable();
 
 	pte -= (addr - start) / PAGE_SIZE;
@@ -4300,6 +4308,8 @@ bool lru_gen_look_around(struct page_vma_mapped_walk *pvmw, unsigned int nr)
 	if (mm_state && suitable_to_scan(i, young))
 		update_bloom_filter(mm_state, max_seq, pvmw->pmd);
 
+	mem_cgroup_put(memcg);
+
 	return true;
 }