diff --git a/net/rose/af_rose.c b/net/rose/af_rose.c
index 29a208ed8fb88d5f2e7f457ffba1cbc1d81f99cc..84e772676ae6c0aea2a90bae40734cfa81bbc1e3 100644
--- a/net/rose/af_rose.c
+++ b/net/rose/af_rose.c
@@ -1299,9 +1299,11 @@ static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
 	case TIOCINQ: {
 		struct sk_buff *skb;
 		long amount = 0L;
-		/* These two are safe on a single CPU system as only user tasks fiddle here */
+
+		spin_lock_irq(&sk->sk_receive_queue.lock);
 		if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
 			amount = skb->len;
+		spin_unlock_irq(&sk->sk_receive_queue.lock);
 		return put_user(amount, (unsigned int __user *) argp);
 	}