Guillaume Nault 59bc404b38 l2tp: hold tunnel socket when handling control frames in l2tp_ip and l2tp_ip6
[ Upstream commit 94d7ee0baa8b764cf64ad91ed69464c1a6a0066b ]

The code following l2tp_tunnel_find() expects that a new reference is
held on sk. Either sk_receive_skb() or the discard_put error path will
drop a reference from the tunnel's socket.

This issue exists in both l2tp_ip and l2tp_ip6.

Fixes: a3c18422a4b4 ("l2tp: hold socket before dropping lock in l2tp_ip{, 6}_recv()")
Signed-off-by: Guillaume Nault <g.nault@alphalink.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-05-03 08:36:35 -07:00
..
2016-10-20 14:32:22 -04:00
2016-12-05 14:48:48 -05:00
2016-12-03 23:54:25 -05:00
2016-07-05 14:08:47 -07:00
2017-05-03 08:36:34 -07:00
2016-05-29 22:33:25 -07:00
2016-10-20 11:23:08 -04:00
2016-12-02 14:03:20 -05:00
2016-06-09 23:41:03 -07:00
2016-08-17 19:36:23 -04:00
2016-08-17 19:36:23 -04:00