netdev - [PATCH net 0/5] net_sched: no longer use qdisc_tree_flush

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Message-ID: <20250611111515.1983366-1-edumazet@google.com>
Date: Wed, 11 Jun 2025 11:15:10 +0000
From: Eric Dumazet <edumazet@...gle.com>
To: "David S . Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, 
	Paolo Abeni <pabeni@...hat.com>
Cc: Simon Horman <horms@...nel.org>, Jamal Hadi Salim <jhs@...atatu.com>, 
	Cong Wang <xiyou.wangcong@...il.com>, Jiri Pirko <jiri@...nulli.us>, netdev@...r.kernel.org, 
	eric.dumazet@...il.com, Eric Dumazet <edumazet@...gle.com>
Subject: [PATCH net 0/5] net_sched: no longer use qdisc_tree_flush_backlog()

This series is based on a report from Gerrard Tai.

Essentially, all users of qdisc_tree_flush_backlog() are racy.

We must instead use qdisc_purge_queue().

Eric Dumazet (5):
  net_sched: prio: fix a race in prio_tune()
  net_sched: red: fix a race in __red_change()
  net_sched: tbf: fix a race in tbf_change()
  net_sched: ets: fix a race in ets_qdisc_change()
  net_sched: remove qdisc_tree_flush_backlog()

 include/net/sch_generic.h | 8 --------
 net/sched/sch_ets.c       | 2 +-
 net/sched/sch_prio.c      | 2 +-
 net/sched/sch_red.c       | 2 +-
 net/sched/sch_tbf.c       | 2 +-
 5 files changed, 4 insertions(+), 12 deletions(-)

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2.50.0.rc0.642.g800a2b2222-goog