diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 4efa56a91447..2cb2d66579d3 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -206,10 +206,10 @@ static struct obj_cgroup *obj_cgroup_alloc(void)
 	return objcg;
 }
 
-static void memcg_reparent_objcgs(struct mem_cgroup *memcg,
-				  struct mem_cgroup *parent)
+static void memcg_reparent_objcgs(struct mem_cgroup *memcg)
 {
 	struct obj_cgroup *objcg, *iter;
+	struct mem_cgroup *parent = parent_mem_cgroup(memcg);
 
 	objcg = rcu_replace_pointer(memcg->objcg, NULL, true);
 
@@ -3386,30 +3386,17 @@ void folio_split_memcg_refs(struct folio *folio, unsigned old_order,
 	css_get_many(&__folio_memcg(folio)->css, new_refs);
 }
 
-static int memcg_online_kmem(struct mem_cgroup *memcg)
+static void memcg_online_kmem(struct mem_cgroup *memcg)
 {
-	struct obj_cgroup *objcg;
-
 	if (mem_cgroup_kmem_disabled())
-		return 0;
+		return;
 
 	if (unlikely(mem_cgroup_is_root(memcg)))
-		return 0;
-
-	objcg = obj_cgroup_alloc();
-	if (!objcg)
-		return -ENOMEM;
-
-	objcg->memcg = memcg;
-	rcu_assign_pointer(memcg->objcg, objcg);
-	obj_cgroup_get(objcg);
-	memcg->orig_objcg = objcg;
+		return;
 
 	static_branch_enable(&memcg_kmem_online_key);
 
 	memcg->kmemcg_id = memcg->id.id;
-
-	return 0;
 }
 
 static void memcg_offline_kmem(struct mem_cgroup *memcg)
@@ -3424,12 +3411,6 @@ static void memcg_offline_kmem(struct mem_cgroup *memcg)
 
 	parent = parent_mem_cgroup(memcg);
 	memcg_reparent_list_lrus(memcg, parent);
-
-	/*
-	 * Objcg's reparenting must be after list_lru's, make sure list_lru
-	 * helpers won't use parent's list_lru until child is drained.
-	 */
-	memcg_reparent_objcgs(memcg, parent);
 }
 
 #ifdef CONFIG_CGROUP_WRITEBACK
@@ -3930,9 +3911,9 @@ mem_cgroup_css_alloc(struct cgroup_subsys_state *parent_css)
 static int mem_cgroup_css_online(struct cgroup_subsys_state *css)
 {
 	struct mem_cgroup *memcg = mem_cgroup_from_css(css);
+	struct obj_cgroup *objcg;
 
-	if (memcg_online_kmem(memcg))
-		goto remove_id;
+	memcg_online_kmem(memcg);
 
 	/*
 	 * A memcg must be visible for expand_shrinker_info()
@@ -3942,6 +3923,15 @@ static int mem_cgroup_css_online(struct cgroup_subsys_state *css)
 	if (alloc_shrinker_info(memcg))
 		goto offline_kmem;
 
+	objcg = obj_cgroup_alloc();
+	if (!objcg)
+		goto free_shrinker;
+
+	objcg->memcg = memcg;
+	rcu_assign_pointer(memcg->objcg, objcg);
+	obj_cgroup_get(objcg);
+	memcg->orig_objcg = objcg;
+
 	if (unlikely(mem_cgroup_is_root(memcg)) && !mem_cgroup_disabled())
 		queue_delayed_work(system_dfl_wq, &stats_flush_dwork,
 				   FLUSH_TIME);
@@ -3964,9 +3954,10 @@ static int mem_cgroup_css_online(struct cgroup_subsys_state *css)
 	xa_store(&mem_cgroup_private_ids, memcg->id.id, memcg, GFP_KERNEL);
 
 	return 0;
+free_shrinker:
+	free_shrinker_info(memcg);
 offline_kmem:
 	memcg_offline_kmem(memcg);
-remove_id:
 	mem_cgroup_private_id_remove(memcg);
 	return -ENOMEM;
 }
@@ -3984,6 +3975,12 @@ static void mem_cgroup_css_offline(struct cgroup_subsys_state *css)
 
 	memcg_offline_kmem(memcg);
 	reparent_deferred_split_queue(memcg);
+	/*
+	 * The reparenting of objcg must be after the reparenting of the
+	 * list_lru and deferred_split_queue above, which ensures that they will
+	 * not mistakenly get the parent list_lru and deferred_split_queue.
+	 */
+	memcg_reparent_objcgs(memcg);
 	reparent_shrinker_deferred(memcg);
 	wb_memcg_offline(memcg);
 	lru_gen_offline_memcg(memcg);