Merge branch 'netlink-strict-attribute-checking-follow-up'

Michal Kubecek says:

====================
netlink: strict attribute checking follow-up

Three follow-up patches for recent strict netlink validation series.

Patch 1 fixes dump handling for genetlink families which validate and parse
messages themselves (e.g. because they need different policies for diferent
commands).

Patch 2 sets bad_attr in extack in one place where this was omitted.

Patch 3 adds new NL_VALIDATE_NESTED flags for strict validation to enable
checking that NLA_F_NESTED value in received messages matches expectations
and includes this flag in NL_VALIDATE_STRICT. This would change userspace
visible behavior but the previous switching to NL_VALIDATE_STRICT for new
code is still only in net-next at the moment.

v2: change error messages to mention NLA_F_NESTED explicitly
====================

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