linux-kernel - Re: [PATCH kernel] fs/io_ring: Fix lockdep warnings

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Message-ID: <8616fff3-8a89-8316-3920-b33fb7db235c@ozlabs.ru>
Date:   Tue, 1 Dec 2020 18:55:41 +1100
From:   Alexey Kardashevskiy <aik@...abs.ru>
To:     Pavel Begunkov <asml.silence@...il.com>, io-uring@...r.kernel.org
Cc:     lexander Viro <viro@...iv.linux.org.uk>,
        Jens Axboe <axboe@...nel.dk>, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH kernel] fs/io_ring: Fix lockdep warnings



On 01/12/2020 03:34, Pavel Begunkov wrote:
> On 30/11/2020 02:00, Alexey Kardashevskiy wrote:
>> There are a few potential deadlocks reported by lockdep and triggered by
>> syzkaller (a syscall fuzzer). These are reported as timer interrupts can
>> execute softirq handlers and if we were executing certain bits of io_ring,
>> a deadlock can occur. This fixes those bits by disabling soft interrupts.
> 
> Jens already fixed that, thanks
> 
> https://lore.kernel.org/io-uring/948d2d3b-5f36-034d-28e6-7490343a5b59@kernel.dk/T/#t

Oh good! I assumed it must be fixed somewhere but could not find it 
quickly in the lists.

> FYI, your email got into spam.

Not good :-/ Wonder why... Can you please forward my mail in attachment 
for debugging (there should be nothing private, I guess)? spf should be 
alright, not sure what else I can do. Thanks,


-- 
Alexey