linux-kernel - Re: [PATCH] phy: qualcomm: Check NULL ptr on lvts_data in qcom_ipq806x_usb_phy

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <4kpmkjp6pp6r34v7se24rscnk2t7g2pjcrqm6l7nt7h3lgsu3v@rauqrchifqjj>
Date: Wed, 21 Aug 2024 09:50:27 -0500
From: Bjorn Andersson <andersson@...nel.org>
To: Ma Ke <make24@...as.ac.cn>
Cc: vkoul@...nel.org, kishon@...nel.org, agross@...eaurora.org, 
	ansuelsmth@...il.com, linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org, 
	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH] phy: qualcomm: Check NULL ptr on lvts_data in
 qcom_ipq806x_usb_phy_probe()

On Wed, Aug 21, 2024 at 09:10:42PM GMT, Ma Ke wrote:
> of_device_get_match_data() can return NULL if of_match_device failed, and
> the pointer 'data' was dereferenced without checking against NULL. Add
> checking of pointer 'data' in qcom_ipq806x_usb_phy_probe().

How do you create the platform_device such that this happens?

Regards,
Bjorn

> 
> Cc: stable@...r.kernel.org
> Fixes: ef19b117b834 ("phy: qualcomm: add qcom ipq806x dwc usb phy driver")
> Signed-off-by: Ma Ke <make24@...as.ac.cn>
> ---
>  drivers/phy/qualcomm/phy-qcom-ipq806x-usb.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/phy/qualcomm/phy-qcom-ipq806x-usb.c b/drivers/phy/qualcomm/phy-qcom-ipq806x-usb.c
> index 06392ed7c91b..9b9fd9c1b1f7 100644
> --- a/drivers/phy/qualcomm/phy-qcom-ipq806x-usb.c
> +++ b/drivers/phy/qualcomm/phy-qcom-ipq806x-usb.c
> @@ -492,6 +492,8 @@ static int qcom_ipq806x_usb_phy_probe(struct platform_device *pdev)
>  		return -ENOMEM;
>  
>  	data = of_device_get_match_data(&pdev->dev);
> +	if (!data)
> +		return -ENODEV;
>  
>  	phy_dwc3->dev = &pdev->dev;
>  
> -- 
> 2.25.1
> 
>