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xfrm: force a dst reference in __xfrm_route_forward()

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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>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2010-06-01 10:04:49 +00:00 • committed by David S. Miller
commit fafeeb6c80
1 changed files with 1 additions and 0 deletions
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net/xfrm/xfrm_policy.c
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@ -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;