Merge branch 'net-sched-init-failure-fixes'

Nikolay Aleksandrov says:

====================
net/sched: init failure fixes

I went over all qdiscs' init, destroy and reset callbacks and found the
issues fixed in each patch. Mostly they are null pointer dereferences due
to uninitialized timer (qdisc watchdog) or double frees due to ->destroy
cleaning up a second time. There's more information in each patch.
I've tested these by either sending wrong attributes from user-spaces, no
attributes or by simulating memory alloc failure where applicable. Also
tried all of the qdiscs as a default qdisc.

Most of these bugs were present before commit 87b60cfacf9f, I've tried to
include proper fixes tags in each patch.

I haven't included individual patch acks in the set, I'd appreciate it if
you take another look and resend them.
====================

Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>