From: Tom Herbert <tom@herbertland.com>
Date: Mon, 20 Apr 2015 21:10:05 +0000 (-0700)
Subject: ppp: call skb_checksum_complete_unset in ppp_receive_frame
X-Git-Tag: v3.16.35~2298
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=a283d4e4ea1f5b8815a85161f1009a31554eee89;p=thirdparty%2Fkernel%2Fstable.git

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@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---

diff --git a/drivers/net/ppp/ppp_generic.c b/drivers/net/ppp/ppp_generic.c
index a75a411b1c273..dbf56debb7e3e 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)