This is a note to let you know that I've just added the patch titled

ip_gre: fix error path when erspan_rcv failed

to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: ip_gre-fix-error-path-when-erspan_rcv-failed.patch and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From foo@baz Thu Mar 22 14:26:48 CET 2018

From: Haishuang Yan yanhaishuang@cmss.chinamobile.com Date: Wed, 20 Dec 2017 10:21:46 +0800 Subject: ip_gre: fix error path when erspan_rcv failed

From: Haishuang Yan yanhaishuang@cmss.chinamobile.com

[ Upstream commit dd8d5b8c5b22e31079b259b8bfb686f1fac1080a ]

When erspan_rcv call return PACKET_REJECT, we shoudn't call ipgre_rcv to process packets again, instead send icmp unreachable message in error path.

Fixes: 84e54fe0a5ea ("gre: introduce native tunnel support for ERSPAN") Acked-by: William Tu u9012063@gmail.com Cc: William Tu u9012063@gmail.com Signed-off-by: Haishuang Yan yanhaishuang@cmss.chinamobile.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/ipv4/ip_gre.c | 2 ++ 1 file changed, 2 insertions(+)

--- a/net/ipv4/ip_gre.c +++ b/net/ipv4/ip_gre.c @@ -408,11 +408,13 @@ static int gre_rcv(struct sk_buff *skb) if (unlikely(tpi.proto == htons(ETH_P_ERSPAN))) { if (erspan_rcv(skb, &tpi, hdr_len) == PACKET_RCVD) return 0; + goto out; }

if (ipgre_rcv(skb, &tpi, hdr_len) == PACKET_RCVD) return 0;

+out: icmp_send(skb, ICMP_DEST_UNREACH, ICMP_PORT_UNREACH, 0); drop: kfree_skb(skb);

Patches currently in stable-queue which might be from yanhaishuang@cmss.chinamobile.com are

queue-4.14/ip_gre-fix-error-path-when-erspan_rcv-failed.patch queue-4.14/ip_gre-fix-potential-memory-leak-in-erspan_rcv.patch