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Pull networking fixes from David Miller:
1) In TCP, don't register an FRTO for cumulatively ACK'd data that was
previously SACK'd, from Neal Cardwell.
2) Need to hold RNL mutex in ipv4 multicast code namespace cleanup,
from Cong WANG.
3) Similarly we have to hold RNL mutex for fib_rules_unregister(), also
from Cong WANG.
4) Revert and rework netns nsid allocation fix, from Nicolas Dichtel.
5) When we encapsulate for a tunnel device, skb->sk still points to the
user socket. So this leads to cases where we retraverse the
ipv4/ipv6 output path with skb->sk being of some other address
family (f.e. AF_PACKET). This can cause things to crash since the
ipv4 output path is dereferencing an AF_PACKET socket as if it were
an ipv4 one.
The short term fix for 'net' and -stable is to elide these socket
checks once we've entered an encapsulation sequence by testing
xmit_recursion.
Longer term we have a better solution wherein we pass the tunnel's
socket down through the output paths, but that is way too invasive
for 'net' and -stable.
From Hannes Frederic Sowa.
6) l2tp_init() failure path forgets to unregister per-net ops, from
Cong WANG.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
net/mlx4_core: Fix error message deprecation for ConnectX-2 cards
net: dsa: fix filling routing table from OF description
l2tp: unregister l2tp_net_ops on failure path
mvneta: dont call mvneta_adjust_link() manually
ipv6: protect skb->sk accesses from recursive dereference inside the stack
netns: don't allocate an id for dead netns
Revert "netns: don't clear nsid too early on removal"
ip6mr: call del_timer_sync() in ip6mr_free_table()
net: move fib_rules_unregister() under rtnl lock
ipv4: take rtnl_lock and mark mrt table as freed on namespace cleanup
tcp: fix FRTO undo on cumulative ACK of SACKed range
xen-netfront: transmit fully GSO-sized packets