From: Eric Dumazet <eric.dumazet@gmail.com>
To: David Miller <davem@davemloft.net>
Cc: netdev <netdev@vger.kernel.org>
Subject: [PATCH] xfrm: force a dst reference in __xfrm_route_forward()
Date: Tue, 01 Jun 2010 22:04:49 +0200 [thread overview]
Message-ID: <1275422689.2638.14.camel@edumazet-laptop> (raw)
Packets going through __xfrm_route_forward() have a not refcounted dst
entry, since we enabled a noref forwarding path.
xfrm_lookup() might incorrectly release this dst entry.
It's a bit late to make invasive changes in xfrm_lookup(), so lets force
a refcount in this path.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
---
net/xfrm/xfrm_policy.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index d965a2b..4bf27d9 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -2153,6 +2153,7 @@ int __xfrm_route_forward(struct sk_buff *skb, unsigned short family)
return 0;
}
+ skb_dst_force(skb);
dst = skb_dst(skb);
res = xfrm_lookup(net, &dst, &fl, NULL, 0) == 0;
next reply other threads:[~2010-06-01 20:05 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-01 20:04 Eric Dumazet [this message]
2010-06-02 9:27 ` [PATCH] xfrm: force a dst reference in __xfrm_route_forward() David Miller
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