This is a note to let you know that I've just added the patch titled gtp: use icmp_ndo_send helper to the 4.9-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: gtp-use-icmp_ndo_send-helper.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From e0fce6f945a26d4e953a147fe7ca11410322c9fe Mon Sep 17 00:00:00 2001 From: "Jason A. Donenfeld" <Jason@xxxxxxxxx> Date: Tue, 11 Feb 2020 20:47:06 +0100 Subject: gtp: use icmp_ndo_send helper From: Jason A. Donenfeld <Jason@xxxxxxxxx> commit e0fce6f945a26d4e953a147fe7ca11410322c9fe upstream. Because gtp is calling icmp from network device context, it should use the ndo helper so that the rate limiting applies correctly. Signed-off-by: Jason A. Donenfeld <Jason@xxxxxxxxx> Cc: Harald Welte <laforge@xxxxxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/net/gtp.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/net/gtp.c +++ b/drivers/net/gtp.c @@ -560,8 +560,8 @@ static int gtp_build_skb_ip4(struct sk_b mtu < ntohs(iph->tot_len)) { netdev_dbg(dev, "packet too big, fragmentation needed\n"); memset(IPCB(skb), 0, sizeof(*IPCB(skb))); - icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED, - htonl(mtu)); + icmp_ndo_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED, + htonl(mtu)); goto err_rt; } Patches currently in stable-queue which might be from Jason@xxxxxxxxx are queue-4.9/sunvnet-use-icmp_ndo_send-helper.patch queue-4.9/gtp-use-icmp_ndo_send-helper.patch queue-4.9/net-icmp-pass-zeroed-opts-from-icmp-v6-_ndo_send-before-sending.patch queue-4.9/icmp-introduce-helper-for-nat-d-source-address-in-network-device-context.patch