Merge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdim...

[karo-tx-linux.git] / net / tipc / udp_media.c

diff --git a/net/tipc/udp_media.c b/net/tipc/udp_media.c
index c170d3138953a2361df5439aeffadd29afa52ad9..6e648d90297a9ecc69a23a68183fde658eed63cd 100644 (file)
--- 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);