--- 8a20aaf1f2316676564501c49bb59c3fe56c898b
+++ 30a36499ee7741afc4f6116c633273ee87032fae
@@ -1065,13 +1065,22 @@ static ssize_t rfcomm_sock_sysfs_show(st
 	struct sock *sk;
 	struct hlist_node *node;
 	char *str = buf;
+	int size = PAGE_SIZE;
 
 	read_lock_bh(&rfcomm_sk_list.lock);
 
 	sk_for_each(sk, node, &rfcomm_sk_list.head) {
-		str += sprintf(str, "%s %s %d %d\n",
+		int len;
+
+		len = snprintf(str, size, "%s %s %d %d\n",
 				batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst),
 				sk->sk_state, rfcomm_pi(sk)->channel);
+
+		size -= len;
+		if (size <= 0)
+			break;
+
+		str += len;
 	}
 
 	read_unlock_bh(&rfcomm_sk_list.lock);