linux-kernel - [77/82] xfrm4: strip ECN bits from tos field

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Date:	Fri, 19 Nov 2010 13:56:38 -0800
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Ulrich Weber <uweber@...aro.com>,
	"David S. Miller" <davem@...emloft.net>
Subject: [77/82] xfrm4: strip ECN bits from tos field

2.6.35-stable review patch.  If anyone has any objections, please let us know.

------------------


From: Ulrich Weber <uweber@...aro.com>

[ Upstream commit 94e2238969e89f5112297ad2a00103089dde7e8f ]

otherwise ECT(1) bit will get interpreted as RTO_ONLINK
and routing will fail with XfrmOutBundleGenError.

Signed-off-by: Ulrich Weber <uweber@...aro.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
---
 net/ipv4/xfrm4_policy.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/ipv4/xfrm4_policy.c
+++ b/net/ipv4/xfrm4_policy.c
@@ -61,7 +61,7 @@ static int xfrm4_get_saddr(struct net *n
 
 static int xfrm4_get_tos(struct flowi *fl)
 {
-	return fl->fl4_tos;
+	return IPTOS_RT_MASK & fl->fl4_tos; /* Strip ECN bits */
 }
 
 static int xfrm4_init_path(struct xfrm_dst *path, struct dst_entry *dst,


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