1 files changed, 7 insertions, 4 deletions

diff --git a/net/netrom/nr_route.c b/net/netrom/nr_route.c
index 915a87ba23e1..2cf330162d7e 100644
--- a/net/netrom/nr_route.c
+++ b/net/netrom/nr_route.c
@@ -670,14 +670,17 @@ int nr_rt_ioctl(unsigned int cmd, void __user *arg)
         case SIOCADDRT:
                 if (copy_from_user(&nr_route, arg, sizeof(struct nr_route_struct)))
                         return -EFAULT;
-                if ((dev = nr_ax25_dev_get(nr_route.device)) == NULL)
+                if (nr_route.ndigis > AX25_MAX_DIGIS)
                         return -EINVAL;
-                if (nr_route.ndigis < 0 || nr_route.ndigis > AX25_MAX_DIGIS) {
-                        dev_put(dev);
+                if ((dev = nr_ax25_dev_get(nr_route.device)) == NULL)
                         return -EINVAL;
-                }
                 switch (nr_route.type) {
                 case NETROM_NODE:
+                        if (strnlen(nr_route.mnemonic, 7) == 7) {
+                                ret = -EINVAL;
+                                break;
+                        }
+
                         ret = nr_add_node(&nr_route.callsign,
                                 nr_route.mnemonic,
                                 &nr_route.neighbour,