diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index 2dae1c1ea362503c98d67d752af331c11d745e38..c4cde57d9216cc82b529baf8009600583f4a078d 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -1927,6 +1927,9 @@ static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
 	len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
 	len += NLMSG_SPACE(sizeof(struct xfrm_user_acquire));
 	len += RTA_SPACE(xfrm_user_sec_ctx_size(xp));
+#ifdef CONFIG_XFRM_SUB_POLICY
+	len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
+#endif
 	skb = alloc_skb(len, GFP_ATOMIC);
 	if (skb == NULL)
 		return -ENOMEM;
@@ -2034,6 +2037,9 @@ static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_eve
 	len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
 	len += NLMSG_SPACE(sizeof(struct xfrm_user_polexpire));
 	len += RTA_SPACE(xfrm_user_sec_ctx_size(xp));
+#ifdef CONFIG_XFRM_SUB_POLICY
+	len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
+#endif
 	skb = alloc_skb(len, GFP_ATOMIC);
 	if (skb == NULL)
 		return -ENOMEM;
@@ -2109,10 +2115,12 @@ static int xfrm_notify_policy_flush(struct km_event *c)
 	struct nlmsghdr *nlh;
 	struct sk_buff *skb;
 	unsigned char *b;
+	int len = 0;
 #ifdef CONFIG_XFRM_SUB_POLICY
 	struct xfrm_userpolicy_type upt;
+	len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
 #endif
-	int len = NLMSG_LENGTH(0);
+	len += NLMSG_LENGTH(0);
 
 	skb = alloc_skb(len, GFP_ATOMIC);
 	if (skb == NULL)