This is a note to let you know that I've just added the patch titled
gtp: clear DF bit on GTP packet tx
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-clear-df-bit-on-gtp-packet-tx.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 foo@baz Wed Dec 6 17:39:55 CET 2017
From: Andreas Schultz <aschultz@xxxxxxxx>
Date: Fri, 27 Jan 2017 10:40:57 +0100
Subject: gtp: clear DF bit on GTP packet tx
From: Andreas Schultz <aschultz@xxxxxxxx>
[ Upstream commit c6ce1d08eede4c2968ed08aafa3165e8e183c5a1 ]
3GPP TS 29.281 and 3GPP TS 29.060 imply that GTP-U packets should be
sent with the DF bit cleared. For example 3GPP TS 29.060, Release 8,
Section 13.2.2:
> Backbone router: Any router in the backbone may fragment the GTP
> packet if needed, according to IPv4.
Signed-off-by: Andreas Schultz <aschultz@xxxxxxxx>
Acked-by: Harald Welte <laforge@xxxxxxxxxxxxx>
Acked-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/gtp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/net/gtp.c
+++ b/drivers/net/gtp.c
@@ -612,7 +612,7 @@ static netdev_tx_t gtp_dev_xmit(struct s
pktinfo.fl4.saddr, pktinfo.fl4.daddr,
pktinfo.iph->tos,
ip4_dst_hoplimit(&pktinfo.rt->dst),
- htons(IP_DF),
+ 0,
pktinfo.gtph_port, pktinfo.gtph_port,
true, false);
break;
Patches currently in stable-queue which might be from aschultz@xxxxxxxx are
queue-4.9/gtp-clear-df-bit-on-gtp-packet-tx.patch
queue-4.9/gtp-fix-cross-netns-recv-on-gtp-socket.patch