netdev - [PATCH [Bug 8756]] IPv6: Don't update ADVMSS on routes where the MTU is not also updated

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Message-ID: <46A500B9.3030702@simon.arlott.org.uk>
Date:	Mon, 23 Jul 2007 20:25:45 +0100
From:	Simon Arlott <simon@...e.lp0.eu>
To:	netdev@...r.kernel.org
CC:	bugme-daemon@...zilla.kernel.org,
	David Miller <davem@...emloft.net>
Subject: [PATCH [Bug 8756]] IPv6: Don't update ADVMSS on routes where the
 MTU is not also updated

The ADVMSS value was incorrectly updated for ALL routes when the MTU 
is updated because it's outside the effect of the if statement's 
condition.

Signed-off-by: Simon Arlott <simon@...e.lp0.eu>
---
This fixes http://bugzilla.kernel.org/show_bug.cgi?id=8756

 net/ipv6/route.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 919de68..55ea80f 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -1983,9 +1983,10 @@ static int rt6_mtu_change_route(struct rt6_info *rt, void *p_arg)
 	    !dst_metric_locked(&rt->u.dst, RTAX_MTU) &&
 	    (dst_mtu(&rt->u.dst) > arg->mtu ||
 	     (dst_mtu(&rt->u.dst) < arg->mtu &&
-	      dst_mtu(&rt->u.dst) == idev->cnf.mtu6)))
+	      dst_mtu(&rt->u.dst) == idev->cnf.mtu6))) {
 		rt->u.dst.metrics[RTAX_MTU-1] = arg->mtu;
-	rt->u.dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(arg->mtu);
+		rt->u.dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(arg->mtu);
+	}
 	return 0;
 }
 
-- 
1.5.0.1

-- 
Simon Arlott


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