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Message-ID: <20230816195853.7c2475d7@kernel.org> Date: Wed, 16 Aug 2023 19:58:53 -0700 From: Jakub Kicinski <kuba@...nel.org> To: Vladimir Oltean <vladimir.oltean@....com> Cc: Jamal Hadi Salim <jhs@...atatu.com>, Cong Wang <xiyou.wangcong@...il.com>, Pedro Tammela <pctammela@...atatu.com>, Victor Nogueira <victor@...atatu.com>, syzbot <syzbot+a3618a167af2021433cd@...kaller.appspotmail.com>, bpf@...r.kernel.org, brauner@...nel.org, davem@...emloft.net, edumazet@...gle.com, jiri@...dia.com, linux-kernel@...r.kernel.org, netdev@...r.kernel.org, pabeni@...hat.com, syzkaller-bugs@...glegroups.com, Vinicius Costa Gomes <vinicius.gomes@...el.com> Subject: Re: [syzbot] [net?] INFO: rcu detected stall in unix_release On Thu, 17 Aug 2023 01:57:59 +0300 Vladimir Oltean wrote: > There are multiple workarounds that can be done in taprio (and mqprio) > depending on what is considered as being sane API. Though I don't want > to get ahead of myself. Maybe there is a way to fast-forward the > qdisc_destroy() of the previous taprio so it doesn't overlap with the > new one's qdisc_create(). Thanks for the details. I'm going to let others comment, but sounds a bit similar to the recent problem with the ingress qdisc. The qdisc expects to own the netdev which explodes when its lifetime rules are fully exercised :(
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