linux-kernel - Re: [PATCH] blk-mq: move cancel of hctx->run_work to the front of blk_exit

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Message-ID: <ab2c4655-0ae0-f5c8-2d59-5e699fe9059e@kernel.dk>
Date:   Fri, 9 Oct 2020 12:46:43 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     Yang Yang <yang.yang@...o.com>,
        Bart Van Assche <bvanassche@....org>,
        Hannes Reinecke <hare@...e.com>,
        Ming Lei <ming.lei@...hat.com>, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     onlyfever@...oud.com
Subject: Re: [PATCH] blk-mq: move cancel of hctx->run_work to the front of
 blk_exit_queue

On 10/9/20 2:00 AM, Yang Yang wrote:
> blk_exit_queue will free elevator_data, while blk_mq_run_work_fn
> will access it. Move cancel of hctx->run_work to the front of
> blk_exit_queue to avoid use-after-free.

Applied, thanks.

-- 
Jens Axboe