linux-kernel - Re: [PATCH v4] misc: fastrpc: Fix incorrect DMA mapping unmap request

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Date:   Wed, 02 Aug 2023 16:00:06 +0100
From:   Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:     linux-arm-msm@...r.kernel.org,
        Ekansh Gupta <quic_ekangupt@...cinc.com>
Cc:     ekangupt@....qualcomm.com, gregkh@...uxfoundation.org,
        linux-kernel@...r.kernel.org, fastrpc.upstream@....qualcomm.com,
        stable <stable@...nel.org>
Subject: Re: [PATCH v4] misc: fastrpc: Fix incorrect DMA mapping unmap
 request


On Wed, 02 Aug 2023 19:27:36 +0530, Ekansh Gupta wrote:
> Scatterlist table is obtained during map create request and the same
> table is used for DMA mapping unmap. In case there is any failure
> while getting the sg_table, ERR_PTR is returned instead of sg_table.
> 
> When the map is getting freed, there is only a non-NULL check of
> sg_table which will also be true in case failure was returned instead
> of sg_table. This would result in improper unmap request. Add proper
> check before setting map table to avoid bad unmap request.
> 
> [...]

Applied, thanks!

[1/1] misc: fastrpc: Fix incorrect DMA mapping unmap request
      commit: 3042d44f7e49c74f2928b4780c66564632449bab

Best regards,
-- 
Srinivas Kandagatla <srinivas.kandagatla@...aro.org>