[VLAN]: Add two missing checks to vlan_ioctl_handler()

In vlan_ioctl_handler() the code misses couple checks for
error return values.

Signed-off-by: Mika Kukkonen <mikukkon@iki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 1 deletions

diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c
index 91e412b0ab00..67465b65abe4 100644
--- a/net/8021q/vlan.c
+++ b/net/8021q/vlan.c
@@ -753,6 +753,8 @@ static int vlan_ioctl_handler(void __user *arg)
                 break;
         case GET_VLAN_REALDEV_NAME_CMD:
                 err = vlan_dev_get_realdev_name(args.device1, args.u.device2);
+                if (err)
+                        goto out;
                 if (copy_to_user(arg, &args,
                                  sizeof(struct vlan_ioctl_args))) {
                         err = -EFAULT;
@@ -761,6 +763,8 @@ static int vlan_ioctl_handler(void __user *arg)
 
         case GET_VLAN_VID_CMD:
                 err = vlan_dev_get_vid(args.device1, &vid);
+                if (err)
+                        goto out;
                 args.u.VID = vid;
                 if (copy_to_user(arg, &args,
                                  sizeof(struct vlan_ioctl_args))) {
@@ -774,7 +778,7 @@ static int vlan_ioctl_handler(void __user *arg)
                         __FUNCTION__, args.cmd);
                 return -EINVAL;
         };
-
+out:
         return err;
 }