Merge branch 'net_sched-fix-uaf-vulnerability-in-hfsc-qdisc'

Cong Wang says:

====================
net_sched: Fix UAF vulnerability in HFSC qdisc

This patchset contains two bug fixes and a selftest for the first one
which we have a reliable reproducer, please check each patch
description for details.
====================

Link: https://patch.msgid.link/20250417184732.943057-1-xiyou.wangcong@gmail.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>