linux-kernel - Re: mt76: fix memcpy to potential null pointer on failed allocation

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Message-Id: <20180108172858.AB27260346@smtp.codeaurora.org>
Date:   Mon,  8 Jan 2018 17:28:58 +0000 (UTC)
From:   Kalle Valo <kvalo@...eaurora.org>
To:     Colin Ian King <colin.king@...onical.com>
Cc:     Matthias Brugger <matthias.bgg@...il.com>,
        Lorenzo Bianconi <lorenzo.bianconi83@...il.com>,
        Felix Fietkau <nbd@....name>, linux-wireless@...r.kernel.org,
        netdev@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org,
        kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: mt76: fix memcpy to potential null pointer on failed allocation

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

> From: Colin Ian King <colin.king@...onical.com>
> 
> Currently if the allocation of skb fails and returns NULL then the
> call to skb_put will cause a null pointer dereference. Fix this by
> checking for a null skb and returning NULL.  Note that calls to
> function mt76x2_mcu_msg_alloc don't directly check the null return
> but instead pass the NULL pointer to mt76x2_mcu_msg_send which
> checks for the NULL and returns ENOMEM in this case.
> 
> Detected by CoverityScan, CID#1462624 ("Dereference null return value")
> 
> Fixes: 7bc04215a66b ("mt76: add driver code for MT76x2e")
> Signed-off-by: Colin Ian King <colin.king@...onical.com>
> Acked-by: Felix Fietkau <nbd@....name>

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

364bea50dbea mt76: fix memcpy to potential null pointer on failed allocation

-- 
https://patchwork.kernel.org/patch/10111747/

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