linux-kernel - Re: [PATCH] dma: at_xdmac: fix a missing check on list iterator

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Message-ID: <YlQuaFjt9TxlutRH@matsya>
Date:   Mon, 11 Apr 2022 19:04:32 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Xiaomeng Tong <xiam0nd.tong@...il.com>
Cc:     ludovic.desroches@...rochip.com, tudor.ambarus@...rochip.com,
        linux-arm-kernel@...ts.infradead.org, dmaengine@...r.kernel.org,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH] dma: at_xdmac: fix a missing check on list iterator

On 27-03-22, 14:11, Xiaomeng Tong wrote:
> The bug is here:
> 	__func__, desc, &desc->tx_dma_desc.phys, ret, cookie, residue);
> 
> The list iterator 'desc' will point to a bogus position containing
> HEAD if the list is empty or no element is found. To avoid dev_dbg()
> prints a invalid address, use a new variable 'iter' as the list
> iterator, while use the origin variable 'desc' as a dedicated
> pointer to point to the found element.

Applied, thanks

-- 
~Vinod