diff --git a/net/rose/af_rose.c b/net/rose/af_rose.c
index d00a0ef39a56b38cae4114654c44a3bddccb35ba..6d3a0ed14706dc40e760255d5b25819760de179b 100644
--- a/net/rose/af_rose.c
+++ b/net/rose/af_rose.c
@@ -1293,9 +1293,11 @@ 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);
 	}