netdev - Re: [PATCH] net: ethernet: mediatek: add NULL check on of_match

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]

Date:   Fri, 7 Jul 2017 16:51:17 +0200
From:   Matthias Brugger <matthias.bgg@...il.com>
To:     "Gustavo A. R. Silva" <garsilva@...eddedor.com>,
        Felix Fietkau <nbd@...nwrt.org>,
        John Crispin <blogic@...nwrt.org>
Cc:     netdev@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: ethernet: mediatek: add NULL check on
 of_match_device() return value



On 07/07/2017 09:11 AM, Gustavo A. R. Silva wrote:
> Check return value from call to of_match_device()
> in order to prevent a NULL pointer dereference.
> 
> In case of NULL print error message and return -ENODEV
> 
> Signed-off-by: Gustavo A. R. Silva <garsilva@...eddedor.com>
> ---

Reviewed-by: Matthias Brugger <matthias.bgg@...il.com>

>   drivers/net/ethernet/mediatek/mtk_eth_soc.c | 5 +++++
>   1 file changed, 5 insertions(+)
> 
> diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
> index adaaafc..6a77dea 100644
> --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
> +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
> @@ -2408,6 +2408,11 @@ static int mtk_probe(struct platform_device *pdev)
>   	int i;
>   
>   	match = of_match_device(of_mtk_match, &pdev->dev);
> +	if (!match) {
> +		dev_err(&pdev->dev, "failed to match device\n");
> +		return -ENODEV;
> +	}
> +
>   	soc = (struct mtk_soc_data *)match->data;
>   
>   	eth = devm_kzalloc(&pdev->dev, sizeof(*eth), GFP_KERNEL);
>