1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 589f0ca668d6..94622e5fb936 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -874,6 +874,8 @@ static int tun_set_iff(struct net *net, struct file *file, struct ifreq *ifr)
 
         dev = __dev_get_by_name(net, ifr->ifr_name);
         if (dev) {
+                if (ifr->ifr_flags & IFF_TUN_EXCL)
+                        return -EBUSY;
                 if ((ifr->ifr_flags & IFF_TUN) && dev->netdev_ops == &tun_netdev_ops)
                         tun = netdev_priv(dev);
                 else if ((ifr->ifr_flags & IFF_TAP) && dev->netdev_ops == &tap_netdev_ops)