linux-kernel - Re: [PATCH -next 5/5] blk-iocost: read 'ioc->params' inside 'ioc->lock' in ioc_timer

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Message-ID: <Y0WhYBXCe5Do6A4z@slm.duckdns.org>
Date:   Tue, 11 Oct 2022 07:01:20 -1000
From:   Tejun Heo <tj@...nel.org>
To:     Yu Kuai <yukuai1@...weicloud.com>
Cc:     axboe@...nel.dk, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org, yukuai3@...wei.com,
        yi.zhang@...wei.com
Subject: Re: [PATCH -next 5/5] blk-iocost: read 'ioc->params' inside
 'ioc->lock' in ioc_timer_fn()

On Tue, Oct 11, 2022 at 04:35:47PM +0800, Yu Kuai wrote:
> From: Yu Kuai <yukuai3@...wei.com>
> 
> 'ioc->params' is updated in ioc_refresh_params(), which is proteced by
> 'ioc->lock', however, ioc_timer_fn() read params outside the lock.
> 
> Signed-off-by: Yu Kuai <yukuai3@...wei.com>

Acked-by: Tejun Heo <tj@...nel.org>

Thanks.

-- 
tejun