1 files changed, 5 insertions, 0 deletions

diff --git a/net/tipc/udp_media.c b/net/tipc/udp_media.c
index c170d3138953..6e648d90297a 100644
--- a/net/tipc/udp_media.c
+++ b/net/tipc/udp_media.c
@@ -52,6 +52,8 @@
 /* IANA assigned UDP port */
 #define UDP_PORT_DEFAULT        6118
 
+#define UDP_MIN_HEADROOM        28
+
 static const struct nla_policy tipc_nl_udp_policy[TIPC_NLA_UDP_MAX + 1] = {
         [TIPC_NLA_UDP_UNSPEC]   = {.type = NLA_UNSPEC},
         [TIPC_NLA_UDP_LOCAL]    = {.type = NLA_BINARY,
@@ -156,6 +158,9 @@ static int tipc_udp_send_msg(struct net *net, struct sk_buff *skb,
         struct sk_buff *clone;
         struct rtable *rt;
 
+        if (skb_headroom(skb) < UDP_MIN_HEADROOM)
+                pskb_expand_head(skb, UDP_MIN_HEADROOM, 0, GFP_ATOMIC);
+
         clone = skb_clone(skb, GFP_ATOMIC);
         skb_set_inner_protocol(clone, htons(ETH_P_TIPC));
         ub = rcu_dereference_rtnl(b->media_ptr);