Re: [PATCH net-next 1/2] ipv6: remove unnecessary codes in tcp_ipv6.c

On Mon, 2012-07-02 at 10:13 +0200, Eric Dumazet wrote:

Note that the old one is the np->opt of the listener, not the child.

I dont understand how np->opt could change under us, since we have
the listener socket locked.

If np->opt can change under us, we are doomed and need to add refcounts.

Hmm, it seems net/ipv6/udp.c uses np->opt outside of the
lock_sock()/release_sock(sk) boundary.