[3.16.y-ckt stable] Patch "ppp: call skb_checksum_complete_unset in ppp_receive_frame" has been added to staging queue

[Luis Henriques]

This is a note to let you know that I have just added a patch titled

    ppp: call skb_checksum_complete_unset in ppp_receive_frame

to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.16.y-queue

This patch is scheduled to be released in version 3.16.7-ckt11.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.16.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

------

>From a283d4e4ea1f5b8815a85161f1009a31554eee89 Mon Sep 17 00:00:00 2001
From: Tom Herbert <tom at herbertland.com>
Date: Mon, 20 Apr 2015 14:10:05 -0700
Subject: ppp: call skb_checksum_complete_unset in ppp_receive_frame

commit 3dfb05340ec6676e6fc71a9ae87bbbe66d3c2998 upstream.

Call checksum_complete_unset in PPP receive to discard checksum-complete
value. PPP does not pull checksum for headers and also modifies packet
as in VJ compression.

Signed-off-by: Tom Herbert <tom at herbertland.com>
Signed-off-by: David S. Miller <davem at davemloft.net>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 drivers/net/ppp/ppp_generic.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ppp/ppp_generic.c b/drivers/net/ppp/ppp_generic.c
index a75a411b1c27..dbf56debb7e3 100644
--- a/drivers/net/ppp/ppp_generic.c
+++ b/drivers/net/ppp/ppp_generic.c
@@ -1710,6 +1710,7 @@ ppp_receive_frame(struct ppp *ppp, struct sk_buff *skb, struct channel *pch)
 {
 	/* note: a 0-length skb is used as an error indication */
 	if (skb->len > 0) {
+		skb_checksum_complete_unset(skb);
 #ifdef CONFIG_PPP_MULTILINK
 		/* XXX do channel-level decompression here */
 		if (PPP_PROTO(skb) == PPP_MP)