linux-kernel - Re: [PATCH] tegra-hsp: fix a missing-check bug in tegra_hsp_doorbell

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Message-ID: <20190608161144.GA4090@zhanggen-UX430UQ>
Date:   Sun, 9 Jun 2019 00:11:44 +0800
From:   Gen Zhang <blackgod016574@...il.com>
To:     jassisinghbrar@...il.com
Cc:     thierry.reding@...il.com, linux-kernel@...r.kernel.org,
        linux-tegra@...r.kernel.org
Subject: Re: [PATCH] tegra-hsp: fix a missing-check bug in
 tegra_hsp_doorbell_create()

On Thu, May 30, 2019 at 09:19:20AM +0800, Gen Zhang wrote:
> In tegra_hsp_doorbell_create(), 'db->name' is allocated by 
> devm_kstrdup_const(). It returns NULL when fails. So 'db->name' should
> be checked.
> 
> Signed-off-by: Gen Zhang <blackgod016574@...il.com>
> Acked-by: Thierry Reding <treding@...dia.com>
> ---
> diff --git a/drivers/mailbox/tegra-hsp.c b/drivers/mailbox/tegra-hsp.c
> index 11fc9fd..b613c46 100644
> --- a/drivers/mailbox/tegra-hsp.c
> +++ b/drivers/mailbox/tegra-hsp.c
> @@ -292,6 +292,8 @@ tegra_hsp_doorbell_create(struct tegra_hsp *hsp, const char *name,
>  	db->channel.hsp = hsp;
>  
>  	db->name = devm_kstrdup_const(hsp->dev, name, GFP_KERNEL);
> +	if (!db->name)
> +		return ERR_PTR(-ENOMEM);
>  	db->master = master;
>  	db->index = index;
>  
> ---
Can anyone look into this patch? It's acked by Thierry Reding 
<treding@...dia.com>.

Thanks
Gen