linux-hardening - Re: [PATCH net v4 2/2] iavf: Fix out-of-bounds when setting channels on remove

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Date:   Wed, 3 May 2023 19:59:48 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Leon Romanovsky <leon@...nel.org>
Cc:     Ding Hui <dinghui@...gfor.com.cn>, davem@...emloft.net,
        edumazet@...gle.com, pabeni@...hat.com,
        intel-wired-lan@...ts.osuosl.org, jesse.brandeburg@...el.com,
        anthony.l.nguyen@...el.com, keescook@...omium.org,
        grzegorzx.szczurek@...el.com, mateusz.palczewski@...el.com,
        mitch.a.williams@...el.com, gregory.v.rose@...el.com,
        jeffrey.t.kirsher@...el.com, michal.kubiak@...el.com,
        simon.horman@...igine.com, madhu.chittim@...el.com,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-hardening@...r.kernel.org, pengdonglin@...gfor.com.cn,
        huangcun@...gfor.com.cn
Subject: Re: [PATCH net v4 2/2] iavf: Fix out-of-bounds when setting
 channels on remove

On Wed, 3 May 2023 11:24:58 +0300 Leon Romanovsky wrote:
> > +		if (test_bit(__IAVF_IN_REMOVE_TASK, &adapter->crit_section))
> > +			return -EOPNOTSUPP;  
> 
> This makes no sense without locking as change to __IAVF_IN_REMOVE_TASK
> can happen any time.

+1, the changes look questionable to me as well.