If local fragmentation is allowed, then ip_select_ident() and
ip_select_ident_more() need to generate unique IDs to ensure
correct defragmentation on the peer.

For example, if IPsec (tunnel mode) has to encrypt large skbs
that have local_df bit set, then all IP fragments that belonged
to different ESP datagrams would have used the same identificator.
If one of these IP fragments would get lost or reordered, then
peer could possibly stitch together wrong IP fragments that did
not belong to the same datagram. This would lead to a packet loss
or data corruption.

Signed-off-by: Ansis Atteka <aatteka@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Pablo Neira Ayuso says:

====================
The following patchset contains Netfilter fixes for you net tree,
mostly targeted to ipset, they are:

* Fix ICMPv6 NAT due to wrong comparison, code instead of type, from
  Phil Oester.

* Fix RCU race in conntrack extensions release path, from Michal Kubecek.

* Fix missing inversion in the userspace ipset test command match if
  the nomatch option is specified, from Jozsef Kadlecsik.

* Skip layer 4 protocol matching in ipset in case of IPv6 fragments,
  also from Jozsef Kadlecsik.

* Fix sequence adjustment in nfnetlink_queue due to using the netlink
  skb instead of the network skb, from Gao feng.

* Make sure we cannot swap of sets with different layer 3 family in
  ipset, from Jozsef Kadlecsik.

* Fix possible bogus matching in ipset if hash sets with net elements
  are used, from Oliver Smith.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

Commit 68b80f11 (netfilter: nf_nat: fix RCU races) introduced
RCU protection for freeing extension data when reallocation
moves them to a new location. We need the same protection when
freeing them in nf_ct_ext_free() in order to prevent a
use-after-free by other threads referencing a NAT extension data
via bysource list.

Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

Pull networking fixes from David Miller:

 1) Brown paper bag fix in HTB scheduler, class options set incorrectly
    due to a typoe.  Fix from Vimalkumar.

 2) It's possible for the ipv6 FIB garbage collector to run before all
    the necessary datastructure are setup during init, defer the
    notifier registry to avoid this problem.  Fix from Michal Kubecek.

 3) New i40e ethernet driver from the Intel folks.

 4) Add new qmi wwan device IDs, from Bjørn Mork.

 5) Doorbell lock in bnx2x driver is not initialized properly in some
    configurations, fix from Ariel Elior.

 6) Revert an ipv6 packet option padding change that broke standardized
    ipv6 implementation test suites.  From Jiri Pirko.

 7) Fix synchronization of ARP information in bonding layer, from
    Nikolay Aleksandrov.

 8) Fix missing error return resulting in illegal memory accesses in
    openvswitch, from Daniel Borkmann.

 9) SCTP doesn't signal poll events properly due to mistaken operator
    precedence, fix also from Daniel Borkmann.

10) __netdev_pick_tx() passes wrong index to sk_tx_queue_set() which
    essentially disables caching of TX queue in sockets :-/ Fix from
    Eric Dumazet.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (29 commits)
  net_sched: htb: fix a typo in htb_change_class()
  net: qmi_wwan: add new Qualcomm devices
  ipv6: don't call fib6_run_gc() until routing is ready
  net: tilegx driver: avoid compiler warning
  fib6_rules: fix indentation
  irda: vlsi_ir: Remove casting the return value which is a void pointer
  irda: donauboe: Remove casting the return value which is a void pointer
  net: fix multiqueue selection
  net: sctp: fix smatch warning in sctp_send_asconf_del_ip
  net: sctp: fix bug in sctp_poll for SOCK_SELECT_ERR_QUEUE
  net: fib: fib6_add: fix potential NULL pointer dereference
  net: ovs: flow: fix potential illegal memory access in __parse_flow_nlattrs
  bcm63xx_enet: remove deprecated IRQF_DISABLED
  net: korina: remove deprecated IRQF_DISABLED
  macvlan: Move skb_clone check closer to call
  qlcnic: Fix warning reported by kbuild test robot.
  bonding: fix bond_arp_rcv setting and arp validate desync state
  bonding: fix store_arp_validate race with mode change
  ipv6/exthdrs: accept tlv which includes only padding
  bnx2x: avoid atomic allocations during initialization
  ...

When loading the ipv6 module, ndisc_init() is called before
ip6_route_init(). As the former registers a handler calling
fib6_run_gc(), this opens a window to run the garbage collector
before necessary data structures are initialized. If a network
device is initialized in this window, adding MAC address to it
triggers a NETDEV_CHANGEADDR event, leading to a crash in
fib6_clean_all().

Take the event handler registration out of ndisc_init() into a
separate function ndisc_late_init() and move it after
ip6_route_init().

Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>

Pull 9p updates from Eric Van Hensbergen:
 "Minor 9p fixes and tweaks for 3.12 merge window

  The first fixes namespace issues which causes a kernel NULL pointer
  dereference, the second fixes uevent handling to work better with
  udev, and the third switches some code to use srlcpy instead of
  strncpy in order to be safer.

  All changes have been baking in for-next for at least 2 weeks"

* tag 'for-linus-3.12-merge' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs:
  fs/9p: avoid accessing utsname after namespace has been torn down
  9p: send uevent after adding/removing mount_tag attribute
  fs: 9p: use strlcpy instead of strncpy

Pull networking changes from David Miller:
 "Noteworthy changes this time around:

   1) Multicast rejoin support for team driver, from Jiri Pirko.

   2) Centralize and simplify TCP RTT measurement handling in order to
      reduce the impact of bad RTO seeding from SYN/ACKs.  Also, when
      both timestamps and local RTT measurements are available prefer
      the later because there are broken middleware devices which
      scramble the timestamp.

      From Yuchung Cheng.

   3) Add TCP_NOTSENT_LOWAT socket option to limit the amount of kernel
      memory consumed to queue up unsend user data.  From Eric Dumazet.

   4) Add a "physical port ID" abstraction for network devices, from
      Jiri Pirko.

   5) Add a "suppress" operation to influence fib_rules lookups, from
      Stefan Tomanek.

   6) Add a networking development FAQ, from Paul Gortmaker.

   7) Extend the information provided by tcp_probe and add ipv6 support,
      from Daniel Borkmann.

   8) Use RCU locking more extensively in openvswitch data paths, from
      Pravin B Shelar.

   9) Add SCTP support to openvswitch, from Joe Stringer.

  10) Add EF10 chip support to SFC driver, from Ben Hutchings.

  11) Add new SYNPROXY netfilter target, from Patrick McHardy.

  12) Compute a rate approximation for sending in TCP sockets, and use
      this to more intelligently coalesce TSO frames.  Furthermore, add
      a new packet scheduler which takes advantage of this estimate when
      available.  From Eric Dumazet.

  13) Allow AF_PACKET fanouts with random selection, from Daniel
      Borkmann.

  14) Add ipv6 support to vxlan driver, from Cong Wang"

Resolved conflicts as per discussion.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1218 commits)
  openvswitch: Fix alignment of struct sw_flow_key.
  netfilter: Fix build errors with xt_socket.c
  tcp: Add missing braces to do_tcp_setsockopt
  caif: Add missing braces to multiline if in cfctrl_linkup_request
  bnx2x: Add missing braces in bnx2x:bnx2x_link_initialize
  vxlan: Fix kernel panic on device delete.
  net: mvneta: implement ->ndo_do_ioctl() to support PHY ioctls
  net: mvneta: properly disable HW PHY polling and ensure adjust_link() works
  icplus: Use netif_running to determine device state
  ethernet/arc/arc_emac: Fix huge delays in large file copies
  tuntap: orphan frags before trying to set tx timestamp
  tuntap: purge socket error queue on detach
  qlcnic: use standard NAPI weights
  ipv6:introduce function to find route for redirect
  bnx2x: VF RSS support - VF side
  bnx2x: VF RSS support - PF side
  vxlan: Notify drivers for listening UDP port changes
  net: usbnet: update addr_assign_type if appropriate
  driver/net: enic: update enic maintainers and driver
  driver/net: enic: Exposing symbols for Cisco's low latency driver
  ...

Conflicts:
	drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
	net/bridge/br_multicast.c
	net/ipv6/sit.c

The conflicts were minor:

1) sit.c changes overlap with change to ip_tunnel_xmit() signature.

2) br_multicast.c had an overlap between computing max_delay using
   msecs_to_jiffies and turning MLDV2_MRC() into an inline function
   with a name using lowercase instead of uppercase letters.

3) stmmac had two overlapping changes, one which conditionally allocated
   and hooked up a dma_cfg based upon the presence of the pbl OF property,
   and another one handling store-and-forward DMA made.  The latter of
   which should not go into the new of_find_property() basic block.

Signed-off-by: David S. Miller <davem@davemloft.net>

This patch adds two more ndo ops: ndo_add_rx_vxlan_port() and
ndo_del_rx_vxlan_port().

Drivers can get notifications through the above functions about changes
of the UDP listening port of VXLAN. Also, when physical ports come up,
now they can call vxlan_get_rx_port() in order to obtain the port number(s)
of the existing VXLAN interface in case they already up before them.

This information about the listening UDP port would be used for VXLAN
related offloads.

A big thank you to John Fastabend (john.r.fastabend@intel.com) for his
input and his suggestions on this patch set.

CC: John Fastabend <john.r.fastabend@intel.com>
CC: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: Joseph Gasparakis <joseph.gasparakis@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Get rid of MLDV2_MRC and use our new macros for mantisse and
exponent to calculate Maximum Response Delay out of the Maximum
Response Code.

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Cc: Hannes Frederic Sowa <hannes@stressinduktion.org>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>