Merge branch 'tcf_foo_init-NULL-deref'

Davide Caratti says:

====================
net/sched: fix NULL dereference in the error path of .init()

with several TC actions it's possible to see NULL pointer dereference,
when the .init() function calls tcf_idr_alloc(), fails at some point and
then calls tcf_idr_release(): this series fixes all them introducing
non-NULL tests in the .cleanup() function.
====================

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

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