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From: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
To: Bhaumik Bhatt <bbhatt@codeaurora.org>
Cc: linux-arm-msm@vger.kernel.org, hemantk@codeaurora.org,
	jhugo@codeaurora.org, linux-kernel@vger.kernel.org,
	loic.poulain@linaro.org, linux-wireless@vger.kernel.org,
	kvalo@codeaurora.org, ath11k@lists.infradead.org
Subject: Re: [PATCH v4 6/6] bus: mhi: core: Add range checks for BHI and BHIe
Date: Fri, 21 May 2021 19:24:37 +0530	[thread overview]
Message-ID: <20210521135437.GN70095@thinkpad> (raw)
In-Reply-To: <1620330705-40192-7-git-send-email-bbhatt@codeaurora.org>

On Thu, May 06, 2021 at 12:51:45PM -0700, 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@codeaurora.org>
> Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>

Thanks,
Mani

> ---
>  drivers/bus/mhi/core/init.c | 18 +++++++++++++++++-
>  1 file changed, 17 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c
> index 1cc2f22..aeb1e3c 100644
> --- a/drivers/bus/mhi/core/init.c
> +++ b/drivers/bus/mhi/core/init.c
> @@ -885,7 +885,8 @@ int mhi_register_controller(struct mhi_controller *mhi_cntrl,
>  	if (!mhi_cntrl || !mhi_cntrl->cntrl_dev || !mhi_cntrl->regs ||
>  	    !mhi_cntrl->runtime_get || !mhi_cntrl->runtime_put ||
>  	    !mhi_cntrl->status_cb || !mhi_cntrl->read_reg ||
> -	    !mhi_cntrl->write_reg || !mhi_cntrl->nr_irqs || !mhi_cntrl->irq)
> +	    !mhi_cntrl->write_reg || !mhi_cntrl->nr_irqs ||
> +	    !mhi_cntrl->irq || !mhi_cntrl->reg_len)
>  		return -EINVAL;
>  
>  	ret = parse_config(mhi_cntrl, config);
> @@ -1077,6 +1078,13 @@ int mhi_prepare_for_power_up(struct mhi_controller *mhi_cntrl)
>  		dev_err(dev, "Error getting BHI offset\n");
>  		goto error_reg_offset;
>  	}
> +
> +	if (bhi_off >= mhi_cntrl->reg_len) {
> +		dev_err(dev, "BHI offset: 0x%x is out of range: 0x%zx\n",
> +			bhi_off, mhi_cntrl->reg_len);
> +		ret = -EINVAL;
> +		goto error_reg_offset;
> +	}
>  	mhi_cntrl->bhi = mhi_cntrl->regs + bhi_off;
>  
>  	if (mhi_cntrl->fbc_download || mhi_cntrl->rddm_size) {
> @@ -1086,6 +1094,14 @@ int mhi_prepare_for_power_up(struct mhi_controller *mhi_cntrl)
>  			dev_err(dev, "Error getting BHIE offset\n");
>  			goto error_reg_offset;
>  		}
> +
> +		if (bhie_off >= mhi_cntrl->reg_len) {
> +			dev_err(dev,
> +				"BHIe offset: 0x%x is out of range: 0x%zx\n",
> +				bhie_off, mhi_cntrl->reg_len);
> +			ret = -EINVAL;
> +			goto error_reg_offset;
> +		}
>  		mhi_cntrl->bhie = mhi_cntrl->regs + bhie_off;
>  	}
>  
> -- 
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
> 

WARNING: multiple messages have this Message-ID
From: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
To: Bhaumik Bhatt <bbhatt@codeaurora.org>
Cc: linux-arm-msm@vger.kernel.org, hemantk@codeaurora.org,
	jhugo@codeaurora.org, linux-kernel@vger.kernel.org,
	loic.poulain@linaro.org, linux-wireless@vger.kernel.org,
	kvalo@codeaurora.org, ath11k@lists.infradead.org
Subject: Re: [PATCH v4 6/6] bus: mhi: core: Add range checks for BHI and BHIe
Date: Fri, 21 May 2021 19:24:37 +0530	[thread overview]
Message-ID: <20210521135437.GN70095@thinkpad> (raw)
In-Reply-To: <1620330705-40192-7-git-send-email-bbhatt@codeaurora.org>

On Thu, May 06, 2021 at 12:51:45PM -0700, 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@codeaurora.org>
> Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>

Thanks,
Mani

> ---
>  drivers/bus/mhi/core/init.c | 18 +++++++++++++++++-
>  1 file changed, 17 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c
> index 1cc2f22..aeb1e3c 100644
> --- a/drivers/bus/mhi/core/init.c
> +++ b/drivers/bus/mhi/core/init.c
> @@ -885,7 +885,8 @@ int mhi_register_controller(struct mhi_controller *mhi_cntrl,
>  	if (!mhi_cntrl || !mhi_cntrl->cntrl_dev || !mhi_cntrl->regs ||
>  	    !mhi_cntrl->runtime_get || !mhi_cntrl->runtime_put ||
>  	    !mhi_cntrl->status_cb || !mhi_cntrl->read_reg ||
> -	    !mhi_cntrl->write_reg || !mhi_cntrl->nr_irqs || !mhi_cntrl->irq)
> +	    !mhi_cntrl->write_reg || !mhi_cntrl->nr_irqs ||
> +	    !mhi_cntrl->irq || !mhi_cntrl->reg_len)
>  		return -EINVAL;
>  
>  	ret = parse_config(mhi_cntrl, config);
> @@ -1077,6 +1078,13 @@ int mhi_prepare_for_power_up(struct mhi_controller *mhi_cntrl)
>  		dev_err(dev, "Error getting BHI offset\n");
>  		goto error_reg_offset;
>  	}
> +
> +	if (bhi_off >= mhi_cntrl->reg_len) {
> +		dev_err(dev, "BHI offset: 0x%x is out of range: 0x%zx\n",
> +			bhi_off, mhi_cntrl->reg_len);
> +		ret = -EINVAL;
> +		goto error_reg_offset;
> +	}
>  	mhi_cntrl->bhi = mhi_cntrl->regs + bhi_off;
>  
>  	if (mhi_cntrl->fbc_download || mhi_cntrl->rddm_size) {
> @@ -1086,6 +1094,14 @@ int mhi_prepare_for_power_up(struct mhi_controller *mhi_cntrl)
>  			dev_err(dev, "Error getting BHIE offset\n");
>  			goto error_reg_offset;
>  		}
> +
> +		if (bhie_off >= mhi_cntrl->reg_len) {
> +			dev_err(dev,
> +				"BHIe offset: 0x%x is out of range: 0x%zx\n",
> +				bhie_off, mhi_cntrl->reg_len);
> +			ret = -EINVAL;
> +			goto error_reg_offset;
> +		}
>  		mhi_cntrl->bhie = mhi_cntrl->regs + bhie_off;
>  	}
>  
> -- 
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
> 

-- 
ath11k mailing list
ath11k@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/ath11k

  parent reply	other threads:[~2021-05-21 13:54 UTC|newest]

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-06 19:51 [PATCH v4 0/6] BHI/BHIe improvements for MHI power purposes Bhaumik Bhatt
2021-05-06 19:51 ` Bhaumik Bhatt
2021-05-06 19:51 ` [PATCH v4 1/6] bus: mhi: core: Set BHI/BHIe offsets on power up preparation Bhaumik Bhatt
2021-05-06 19:51   ` Bhaumik Bhatt
2021-05-21 13:36   ` Manivannan Sadhasivam
2021-05-21 13:36     ` Manivannan Sadhasivam
2021-05-06 19:51 ` [PATCH v4 2/6] bus: mhi: core: Set BHI and BHIe pointers to NULL in clean-up Bhaumik Bhatt
2021-05-06 19:51   ` Bhaumik Bhatt
2021-05-21 13:37   ` Manivannan Sadhasivam
2021-05-21 13:37     ` Manivannan Sadhasivam
2021-05-06 19:51 ` [PATCH v4 3/6] bus: mhi: Add MMIO region length to controller structure Bhaumik Bhatt
2021-05-06 19:51   ` Bhaumik Bhatt
2021-05-21 13:38   ` Manivannan Sadhasivam
2021-05-21 13:38     ` Manivannan Sadhasivam
2021-05-06 19:51 ` [PATCH v4 4/6] ath11k: set register access length for MHI driver Bhaumik Bhatt
2021-05-06 19:51   ` Bhaumik Bhatt
2021-05-21 13:51   ` Manivannan Sadhasivam
2021-05-21 13:51     ` Manivannan Sadhasivam
2021-06-14 16:02     ` Kalle Valo
2021-06-14 16:02       ` Kalle Valo
2021-06-14 17:49       ` Bhaumik Bhatt
2021-06-14 17:49         ` Bhaumik Bhatt
2021-06-16 17:38         ` Bhaumik Bhatt
2021-06-16 17:38           ` Bhaumik Bhatt
2021-06-18  6:45           ` Manivannan Sadhasivam
2021-06-18  6:45             ` Manivannan Sadhasivam
2021-06-23 17:29             ` Kalle Valo
2021-06-23 17:29               ` Kalle Valo
2021-06-24  6:09               ` Manivannan Sadhasivam
2021-06-24  6:09                 ` Manivannan Sadhasivam
2021-06-23 17:34         ` Kalle Valo
2021-06-23 17:34           ` Kalle Valo
2021-06-23 21:33           ` Bhaumik Bhatt
2021-06-23 21:33             ` Bhaumik Bhatt
2021-05-06 19:51 ` [PATCH v4 5/6] bus: mhi: pci_generic: Set " Bhaumik Bhatt
2021-05-06 19:51   ` Bhaumik Bhatt
2021-05-21 13:52   ` Manivannan Sadhasivam
2021-05-21 13:52     ` Manivannan Sadhasivam
2021-05-06 19:51 ` [PATCH v4 6/6] bus: mhi: core: Add range checks for BHI and BHIe Bhaumik Bhatt
2021-05-06 19:51   ` Bhaumik Bhatt
2021-05-07  2:33   ` Hemant Kumar
2021-05-07  2:33     ` Hemant Kumar
2021-05-21 13:54   ` Manivannan Sadhasivam [this message]
2021-05-21 13:54     ` Manivannan Sadhasivam
2021-06-25  5:28 ` [PATCH v4 0/6] BHI/BHIe improvements for MHI power purposes Manivannan Sadhasivam
2021-06-25  5:28   ` Manivannan Sadhasivam
  -- strict thread matches above, loose matches on Subject: below --
2021-05-06 19:32 Bhaumik Bhatt
2021-05-06 19:32 ` [PATCH v4 6/6] bus: mhi: core: Add range checks for BHI and BHIe Bhaumik Bhatt
2021-05-06 19:32   ` Bhaumik Bhatt

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