diff --git a/net/bridge/br_netfilter_hooks.c b/net/bridge/br_netfilter_hooks.c
index 9981e0dfdd4d..d0d41dbbfe38 100644
--- a/net/bridge/br_netfilter_hooks.c
+++ b/net/bridge/br_netfilter_hooks.c
@@ -602,8 +602,12 @@ static unsigned int br_nf_local_in(void *priv,
 	if (likely(nf_ct_is_confirmed(ct)))
 		return NF_ACCEPT;
 
+	if (WARN_ON_ONCE(refcount_read(&nfct->use) != 1)) {
+		nf_reset_ct(skb);
+		return NF_ACCEPT;
+	}
+
 	WARN_ON_ONCE(skb_shared(skb));
-	WARN_ON_ONCE(refcount_read(&nfct->use) != 1);
 
 	/* We can't call nf_confirm here, it would create a dependency
 	 * on nf_conntrack module.
diff --git a/net/netfilter/nfnetlink_queue.c b/net/netfilter/nfnetlink_queue.c
index 89b16d36da9c..d5f5b93a99a0 100644
--- a/net/netfilter/nfnetlink_queue.c
+++ b/net/netfilter/nfnetlink_queue.c
@@ -640,10 +640,41 @@ static bool nf_ct_drop_unconfirmed(const struct nf_queue_entry *entry)
 {
 #if IS_ENABLED(CONFIG_NF_CONNTRACK)
 	static const unsigned long flags = IPS_CONFIRMED | IPS_DYING;
-	const struct nf_conn *ct = (void *)skb_nfct(entry->skb);
+	struct nf_conn *ct = (void *)skb_nfct(entry->skb);
+	unsigned long status;
+	unsigned int use;
 
-	if (ct && ((ct->status & flags) == IPS_DYING))
+	if (!ct)
+		return false;
+
+	status = READ_ONCE(ct->status);
+	if ((status & flags) == IPS_DYING)
 		return true;
+
+	if (status & IPS_CONFIRMED)
+		return false;
+
+	/* in some cases skb_clone() can occur after initial conntrack
+	 * pickup, but conntrack assumes exclusive skb->_nfct ownership for
+	 * unconfirmed entries.
+	 *
+	 * This happens for br_netfilter and with ip multicast routing.
+	 * We can't be solved with serialization here because one clone could
+	 * have been queued for local delivery.
+	 */
+	use = refcount_read(&ct->ct_general.use);
+	if (likely(use == 1))
+		return false;
+
+	/* Can't decrement further? Exclusive ownership. */
+	if (!refcount_dec_not_one(&ct->ct_general.use))
+		return false;
+
+	skb_set_nfct(entry->skb, 0);
+	/* No nf_ct_put(): we already decremented .use and it cannot
+	 * drop down to 0.
+	 */
+	return true;
 #endif
 	return false;
 }