linux-kernel - Re: [PATCH v1 6/6] bus: mhi: core: Add range checks for BHI and BHIe

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Date:   Tue, 4 May 2021 11:30:59 -0600
From:   Jeffrey Hugo <quic_jhugo@...cinc.com>
To:     Bhaumik Bhatt <bbhatt@...eaurora.org>,
        <manivannan.sadhasivam@...aro.org>
CC:     <linux-arm-msm@...r.kernel.org>, <hemantk@...eaurora.org>,
        <linux-kernel@...r.kernel.org>, <loic.poulain@...aro.org>,
        <linux-wireless@...r.kernel.org>, <kvalo@...eaurora.org>,
        <ath11k@...ts.infradead.org>
Subject: Re: [PATCH v1 6/6] bus: mhi: core: Add range checks for BHI and BHIe

On 4/16/2021 12:47 PM, Bhaumik Bhatt wrote:
> When obtaining the BHI or BHIe offsets during the power up
> preparation phase, range checks are missing. These can help
> controller drivers avoid accessing any address outside of the
> MMIO region. Ensure that mhi_cntrl->reg_len is set before MHI
> registration as it is a required field and range checks will
> fail without it.
> 
> Signed-off-by: Bhaumik Bhatt <bbhatt@...eaurora.org>
> ---

Reviewed-by: Jeffrey Hugo <quic_jhugo@...cinc.com>