Merge branch 'net-sched-bind-logic-fixes-for-cls_fw-cls_u32-and-cls_route'

valis says:

====================
net/sched Bind logic fixes for cls_fw, cls_u32 and cls_route

Three classifiers (cls_fw, cls_u32 and cls_route) always copy
tcf_result struct into the new instance of the filter on update.

This causes a problem when updating a filter bound to a class,
as tcf_unbind_filter() is always called on the old instance in the
success path, decreasing filter_cnt of the still referenced class
and allowing it to be deleted, leading to a use-after-free.

This patch set fixes this issue in all affected classifiers by no longer
copying the tcf_result struct from the old filter.
====================

Link: https://lore.kernel.org/r/20230729123202.72406-1-jhs@mojatatu.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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