Merge branch 'catch-all-devices'

Hristo Venev says:

====================
net: Fix two use-after-free bugs

The two patches fix two use-after-free bugs related to cleaning up
network namespaces, one in sit and one in ip6_tunnel. They are easy to
trigger if the user has the ability to create network namespaces.

The bugs can be used to trigger null pointer dereferences. I am not
sure if they can be exploited further, but I would guess that they
can. I am not sending them to the mailing list without confirmation
that doing so would be OK.
====================

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

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