From: Eric Dumazet <redacted>
Date: Fri, 30 Oct 2009 16:03:53 +0100

[PATCH take2] net: fix sk_forward_alloc corruption

On UDP sockets, we must call skb_free_datagram() with socket locked,
or risk sk_forward_alloc corruption. This requirement is not respected
in SUNRPC.

Add a convenient helper, skb_free_datagram_locked() and use it in SUNRPC

Reported-by: Francis Moreau <redacted>
Signed-off-by: Eric Dumazet <redacted>

I've tentatively applied this to my net-2.6 tree, I won't
push it out until we have positive testing results.