1 files changed, 5 insertions, 0 deletions

diff --git a/net/tipc/udp_media.c b/net/tipc/udp_media.c
index 78cab9c5a445..b58dc95f3d35 100644
--- a/net/tipc/udp_media.c
+++ b/net/tipc/udp_media.c
@@ -697,6 +697,11 @@ static int tipc_udp_enable(struct net *net, struct tipc_bearer *b,
                 udp_conf.local_ip.s_addr = htonl(INADDR_ANY);
                 udp_conf.use_udp_checksums = false;
                 ub->ifindex = dev->ifindex;
+                if (tipc_mtu_bad(dev, sizeof(struct iphdr) +
+                                      sizeof(struct udphdr))) {
+                        err = -EINVAL;
+                        goto err;
+                }
                 b->mtu = dev->mtu - sizeof(struct iphdr)
                         - sizeof(struct udphdr);
 #if IS_ENABLED(CONFIG_IPV6)