linux-kernel - Re: [PATCH v2] io_uring: Fix ->data corruption on re-enqueue

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Message-ID: <e48d707c-9ee9-a455-651a-85e16d11eb74@kernel.dk>
Date:   Mon, 23 Mar 2020 08:25:14 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     Pavel Begunkov <asml.silence@...il.com>, io-uring@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] io_uring: Fix ->data corruption on re-enqueue

On 3/23/20 2:19 AM, Pavel Begunkov wrote:
> work->data and work->list are shared in union. io_wq_assign_next() sets
> ->data if a req having a linked_timeout, but then io-wq may want to use
> work->list, e.g. to do re-enqueue of a request, so corrupting ->data.
> 
> Don't need ->data, remove it and get linked_timeout through @link_list.

Thanks!

-- 
Jens Axboe