From: Guillaume Nault <g.na...@alphalink.fr>
Date: Fri, 13 Oct 2017 19:22:35 +0200
> When pppol2tp_session_ioctl() is called by pppol2tp_tunnel_ioctl(),
> the session may be unconnected. That is, it was created by
> pppol2tp_session_create() and hasn't been connected with
> pppol2tp_connect(). In this case, ps->sock is NULL, so we need to check
> for this case in order to avoid dereferencing a NULL pointer.
>
> Fixes: 309795f4bec2 ("l2tp: Add netlink control API for L2TP")
> Signed-off-by: Guillaume Nault <g.na...@alphalink.fr>
Applied and queued up for -stable, thanks.
