linux-kernel - Re: [PATCH] net: wireless: ath: ath9k: Fix a possible data race in ath_chanctx_set

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Message-ID: <87o9hqxktc.fsf@kamboji.qca.qualcomm.com>
Date:   Tue, 08 May 2018 17:51:11 +0300
From:   Kalle Valo <kvalo@...eaurora.org>
To:     Jia-Ju Bai <baijiaju1990@...il.com>
Cc:     ath9k-devel@....qualcomm.com, linux-wireless@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: wireless: ath: ath9k: Fix a possible data race in ath_chanctx_set_next

Jia-Ju Bai <baijiaju1990@...il.com> writes:

> The write operation to "sc->next_chan" is protected by
> the lock on line 1287, but the read operation to
> this data on line 1262 is not protected by the lock.
> Thus, there may exist a data race for "sc->next_chan".
>
> To fix this data race, the read operation to "sc->next_chan" 
> should be also protected by the lock.
>
> Signed-off-by: Jia-Ju Bai <baijiaju1990@...il.com>

I need this reviewed by someone else before I'm willing to take it.

-- 
Kalle Valo