This is a note to let you know that I've just added the patch titled tipc: make sure IPv6 header fits in skb headroom to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: tipc-make-sure-ipv6-header-fits-in-skb-headroom.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 9bd160bfa27fa41927dbbce7ee0ea779700e09ef Mon Sep 17 00:00:00 2001 From: Richard Alpe <richard.alpe@xxxxxxxxxxxx> Date: Mon, 14 Mar 2016 09:43:52 +0100 Subject: tipc: make sure IPv6 header fits in skb headroom From: Richard Alpe <richard.alpe@xxxxxxxxxxxx> 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.alpe@xxxxxxxxxxxx> Acked-by: Jon Maloy <jon.maloy@xxxxxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Jon Maloy <jon.maloy@xxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- 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}, Patches currently in stable-queue which might be from richard.alpe@xxxxxxxxxxxx are queue-4.4/tipc-make-sure-ipv6-header-fits-in-skb-headroom.patch