linux-kernel - Re: [PATCH] bus: mhi: core: Validate channel ID when processing command completions

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Message-ID: <dc9cbecc-c868-09b5-6486-e9f0389e5d7b@codeaurora.org>
Date:   Mon, 26 Apr 2021 17:44:43 -0700
From:   Hemant Kumar <hemantk@...eaurora.org>
To:     Bhaumik Bhatt <bbhatt@...eaurora.org>,
        manivannan.sadhasivam@...aro.org
Cc:     linux-arm-msm@...r.kernel.org, jhugo@...eaurora.org,
        linux-kernel@...r.kernel.org, loic.poulain@...aro.org
Subject: Re: [PATCH] bus: mhi: core: Validate channel ID when processing
 command completions



On 4/26/21 4:58 PM, Bhaumik Bhatt wrote:
> MHI reads the channel ID from the event ring element sent by the
> device which can be any value between 0 and 255. In order to
> prevent any out of bound accesses, add a check against the maximum
> number of channels supported by the controller and those channels
> not configured yet so as to skip processing of that event ring
> element.
> 
> Fixes: 1d3173a3bae7 ("bus: mhi: core: Add support for processing events from client device")
> Signed-off-by: Bhaumik Bhatt <bbhatt@...eaurora.org>
> ---
Reviewed-by: Hemant Kumar <hemantk@...eaurora.org>

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