From: Guillaume Nault <g.na...@alphalink.fr>
Date: Mon, 30 Oct 2017 17:58:58 +0100
> Use l2tp_tunnel_get() in pppol2tp_connect() to ensure the tunnel isn't
> going to disappear while processing the rest of the function.
>
> Fixes: fd558d186df2 ("l2tp: Split pppol2tp patch into separate l2tp and ppp
> parts")
> Signed-off-by: Guillaume Nault <g.na...@alphalink.fr>
> ---
>
> Note: in case of backporting to -stable, this patch only makes sense if
> f3c66d4e144a ("l2tp: prevent creation of sessions on terminated tunnels")
> is already present in the tree, as we need this issue to be fixed
> before fixing the current one.
>
> The reason is that when connecting a session, we don't only depend on
> the tunnel, but also on its socket. Therefore, holding a reference on
> the tunnel is not enough, we also have to make sure that it's not going
> to drop its socket before the session is registered.
Applied and thank you for the detailed -stable explanation, it really
helps.
