From: Guillaume Nault <g.na...@alphalink.fr>
Date: Mon, 3 Apr 2017 12:03:13 +0200
> Take a reference on the sessions returned by l2tp_session_find_nth()
> (and rename it l2tp_session_get_nth() to reflect this change), so that
> caller is assured that the session isn't going to disappear while
> processing it.
>
> For procfs and debugfs handlers, the session is held in the .start()
> callback and dropped in .show(). Given that pppol2tp_seq_session_show()
> dereferences the associated PPPoL2TP socket and that
> l2tp_dfs_seq_session_show() might call pppol2tp_show(), we also need to
> call the session's .ref() callback to prevent the socket from going
> away from under us.
>
> Fixes: fd558d186df2 ("l2tp: Split pppol2tp patch into separate l2tp and ppp
> parts")
> Fixes: 0ad6614048cf ("l2tp: Add debugfs files for dumping l2tp debug info")
> 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.
