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Message-ID: <CANn89iJMHqg4e_tErTERx=-ERXbA+CRbeC0chp9ofqANwwjhLA@mail.gmail.com>
Date: Fri, 27 Sep 2024 13:54:59 +0200
From: Eric Dumazet <edumazet@...gle.com>
To: Hillf Danton <hdanton@...a.com>
Cc: syzbot <syzbot+05f9cecd28e356241aba@...kaller.appspotmail.com>, 
	linux-kernel@...r.kernel.org, 
	Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>, Boqun Feng <boqun.feng@...il.com>, 
	Linus Torvalds <torvalds@...ux-foundation.org>, netdev@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [net?] INFO: task hung in new_device_store (5)

On Fri, Sep 27, 2024 at 1:44 PM Hillf Danton <hdanton@...a.com> wrote:
>
> On Fri, 27 Sep 2024 13:24:54 +0200 Eric Dumazet <edumazet@...gle.com>
> > I suggest you look at why we have to use rtnl_trylock()
> >
> > If you know better, please send patches to remove all instances.
>
> No patch is needed before you show us deadlock. I suspect you could
> spot a case where lockdep fails to report deadlock.

Please try to not educate maintainers about their stuff.

lockdep is usually right. And here there is an actua syzbot report.

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