4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Richard Alpe <richard.a...@ericsson.com>

commit 9bd160bfa27fa41927dbbce7ee0ea779700e09ef upstream.

Expand headroom further in order to be able to fit the larger IPv6
header. Prior to this patch this caused a skb under panic for certain
tipc packets when using IPv6 UDP bearer(s).

Signed-off-by: Richard Alpe <richard.a...@ericsson.com>
Acked-by: Jon Maloy <jon.ma...@ericsson.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Jon Maloy <jon.ma...@ericsson.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 net/tipc/udp_media.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/tipc/udp_media.c
+++ b/net/tipc/udp_media.c
@@ -52,7 +52,7 @@
 /* IANA assigned UDP port */
 #define UDP_PORT_DEFAULT       6118
 
-#define UDP_MIN_HEADROOM        28
+#define UDP_MIN_HEADROOM        48
 
 static const struct nla_policy tipc_nl_udp_policy[TIPC_NLA_UDP_MAX + 1] = {
        [TIPC_NLA_UDP_UNSPEC]   = {.type = NLA_UNSPEC},


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