[PATCH net 0/5] l2tp: fix some l2tp_tunnel_find() issues in l2tp_netlink

[Guillaume Nault <g.nault@alphalink.fr>]

Since l2tp_tunnel_find() doesn't take a reference on the tunnel it
returns, its users are almost guaranteed to be racy.

This series defines l2tp_tunnel_get() which can be used as a safe
replacement, and converts some of l2tp_tunnel_find() users in the
l2tp_netlink module.

Other users often combine this issue with other more or less subtle
races. They will be fixed incrementally in followup series.

Guillaume Nault (5):
  l2tp: hold tunnel while looking up sessions in l2tp_netlink
  l2tp: hold tunnel while processing genl delete command
  l2tp: hold tunnel while handling genl tunnel updates
  l2tp: hold tunnel while handling genl TUNNEL_GET commands
  l2tp: hold tunnel used while creating sessions with netlink

 net/l2tp/l2tp_core.c    | 66 ++++++++++++++++---------------------------------
 net/l2tp/l2tp_core.h    | 13 ++++++++++
 net/l2tp/l2tp_netlink.c | 66 +++++++++++++++++++++++++++++--------------------
 3 files changed, 73 insertions(+), 72 deletions(-)

-- 
2.14.1