linux-kernel - Re: [PATCH] dmaengine: at_hdmac: fix potential NULL pointer dereference in atc_prep_dma

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Date:   Wed, 29 Nov 2017 19:49:30 +0530
From:   Vinod Koul <vinod.koul@...el.com>
To:     "Gustavo A. R. Silva" <garsilva@...eddedor.com>
Cc:     Ludovic Desroches <ludovic.desroches@...rochip.com>,
        Dan Williams <dan.j.williams@...el.com>,
        linux-arm-kernel@...ts.infradead.org, dmaengine@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dmaengine: at_hdmac: fix potential NULL pointer
 dereference in atc_prep_dma_interleaved

On Mon, Nov 20, 2017 at 08:28:14AM -0600, Gustavo A. R. Silva wrote:
> _xt_ is being dereferenced before it is null checked, hence there is a
> potential null pointer dereference.
> 
> Fix this by moving the pointer dereference after _xt_ has been null
> checked.
> 
> This issue was detected with the help of Coccinelle.

Applied, thanks

-- 
~Vinod