linux-kernel - Re: [PATCH] libertas_tf: avoid a null dereference in pointer priv

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Date:   Wed,  6 May 2020 08:44:42 +0000 (UTC)
From:   Kalle Valo <kvalo@...eaurora.org>
To:     Colin King <colin.king@...onical.com>
Cc:     "David S . Miller" <davem@...emloft.net>,
        Lubomir Rintel <lkundrak@...sk>,
        Steve deRosier <derosier@...-sierra.com>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] libertas_tf: avoid a null dereference in pointer priv

Colin King <colin.king@...onical.com> wrote:

> From: Colin Ian King <colin.king@...onical.com>
> 
> Currently there is a check if priv is null when calling lbtf_remove_card
> but not in a previous call to if_usb_reset_dev that can also dereference
> priv.  Fix this by also only calling lbtf_remove_card if priv is null.
> 
> It is noteable that there don't seem to be any bugs reported that the
> null pointer dereference has ever occurred, so I'm not sure if the null
> check is required, but since we're doing a null check anyway it should
> be done for both function calls.
> 
> Addresses-Coverity: ("Dereference before null check")
> Fixes: baa0280f08c7 ("libertas_tf: don't defer firmware loading until start()")
> Signed-off-by: Colin Ian King <colin.king@...onical.com>

Patch applied to wireless-drivers-next.git, thanks.

049ceac308b0 libertas_tf: avoid a null dereference in pointer priv

-- 
https://patchwork.kernel.org/patch/11523055/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches