[PATCH 00/27] more l2tp locking and ordering fixes

[Giuliano Procida <gprocida@google.com>]

Hi Greg.

This is for 4.4.

This is a follow-up to "l2tp locking and ordering fixes" for 4.9.

Compared with that series, this pulls in 5 more patches (the first 5
Guillaume Nault ones below) containing more of the same as well as
making later changes apply more cleanly.

As before, every commit compiles with make allmodconfig, but I have no
hardware to test this with.

9dd79945b0f8 (use IS_ENABLED) would have made one patch or so cleaner
but I didn't add it.

There are also bunch of fixes that aren't l2tp locking or ordering
fixes and I didn't add them either. For the record...

Between 4.4 and 4.9:

018f82585823 net: l2tp: fix reversed udp6 checksum flags
56cff471d0c6 l2tp: Fix the connect status check in pppol2tp_getname
286c72deabaa udp: must lock the socket in udp_disconnect()
df90e6886146 l2tp: fix lookup for sockets not bound to a device in l2tp_ip
31e2f21fb35b l2tp: fix address test in __l2tp_ip6_bind_lookup()

Between 4.9 and 4.9.latest:

000224c1106c l2tp: consider '::' as wildcard address in l2tp_ip6 socket lookup
d2d74d0e58b2 l2tp: take remote address into account in l2tp_ip and l2tp_ip6 socket lookups
65b05d03a578 l2tp: remove configurable payload offset
b437ed583592 l2tp: Fix possible NULL pointer dereference

Regards,
Giuliano.

Asbjørn Sloth Tønnesen (3):
  net: l2tp: export debug flags to UAPI
  net: l2tp: deprecate PPPOL2TP_MSG_* in favour of L2TP_MSG_*
  net: l2tp: ppp: change PPPOL2TP_MSG_* => L2TP_MSG_*

Guillaume Nault (22):
  l2tp: lock socket before checking flags in connect()
  l2tp: fix racy socket lookup in l2tp_ip and l2tp_ip6 bind()
  l2tp: hold session while sending creation notifications
  l2tp: take a reference on sessions used in genetlink handlers
  l2tp: don't use l2tp_tunnel_find() in l2tp_ip and l2tp_ip6
  l2tp: remove useless duplicate session detection in l2tp_netlink
  l2tp: remove l2tp_session_find()
  l2tp: define parameters of l2tp_session_get*() as "const"
  l2tp: define parameters of l2tp_tunnel_find*() as "const"
  l2tp: initialise session's refcount before making it reachable
  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
  l2tp: prevent creation of sessions on terminated tunnels
  l2tp: pass tunnel pointer to ->session_create()
  l2tp: fix l2tp_eth module loading
  l2tp: don't register sessions in l2tp_session_create()
  l2tp: initialise l2tp_eth sessions before registering them
  l2tp: protect sock pointer of struct pppol2tp_session with RCU
  l2tp: initialise PPP sessions before registering them

R. Parameswaran (2):
  New kernel function to get IP overhead on a socket.
  L2TP:Adjust intf MTU, add underlay L3, L2 hdrs.

 Documentation/networking/l2tp.txt |   8 +-
 include/linux/net.h               |   3 +
 include/net/ipv6.h                |   2 +
 include/uapi/linux/if_pppol2tp.h  |  13 +-
 include/uapi/linux/l2tp.h         |  17 +-
 net/ipv6/datagram.c               |   4 +-
 net/l2tp/l2tp_core.c              | 181 ++++++-----------
 net/l2tp/l2tp_core.h              |  47 +++--
 net/l2tp/l2tp_eth.c               | 214 +++++++++++++--------
 net/l2tp/l2tp_ip.c                |  68 ++++---
 net/l2tp/l2tp_ip6.c               |  82 ++++----
 net/l2tp/l2tp_netlink.c           | 124 +++++++-----
 net/l2tp/l2tp_ppp.c               | 309 ++++++++++++++++++------------
 net/socket.c                      |  46 +++++
 14 files changed, 629 insertions(+), 489 deletions(-)

-- 
2.27.0.rc0.183.gde8f92d652-goog