linux-kernel - Re: [PATCH v3] libnvdimm/of_pmem: Replace kstrdup with devm

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] [day] [month] [year] [list]

Message-ID: <64ac20b56f0b3_ff2c929448@iweiny-mobl.notmuch>
Date:   Mon, 10 Jul 2023 08:16:05 -0700
From:   Ira Weiny <ira.weiny@...el.com>
To:     Jiasheng Jiang <jiasheng@...as.ac.cn>, <ira.weiny@...el.com>,
        <dan.j.williams@...el.com>, <vishal.l.verma@...el.com>,
        <dave.jiang@...el.com>, <oohall@...il.com>,
        <aneesh.kumar@...ux.ibm.com>
CC:     <nvdimm@...ts.linux.dev>, <linux-kernel@...r.kernel.org>,
        Jiasheng Jiang <jiasheng@...as.ac.cn>
Subject: Re: [PATCH v3] libnvdimm/of_pmem: Replace kstrdup with devm_kstrdup
 and add check

Jiasheng Jiang wrote:
> Replace kstrdup() with devm_kstrdup() to avoid memory leak and
> add check for the return value of the devm_kstrdup() to avoid
> NULL pointer dereference
> 
> Fixes: 49bddc73d15c ("libnvdimm/of_pmem: Provide a unique name for bus provider")
> Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn>

LTGM
Reviewed-by: Ira Weiny <ira.weiny@...el.com>

> ---
> Changelog:
> 
> v2 -> v3:
> 
> 1. Correct the usage of devm_kstrdup().
> 
> v1 -> v2:
> 
> 1. Replace kstrdup() with devm_kstrdup().
> ---
>  drivers/nvdimm/of_pmem.c | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/nvdimm/of_pmem.c b/drivers/nvdimm/of_pmem.c
> index 10dbdcdfb9ce..1d2b1ab5b737 100644
> --- a/drivers/nvdimm/of_pmem.c
> +++ b/drivers/nvdimm/of_pmem.c
> @@ -30,7 +30,12 @@ static int of_pmem_region_probe(struct platform_device *pdev)
>  	if (!priv)
>  		return -ENOMEM;
>  
> -	priv->bus_desc.provider_name = kstrdup(pdev->name, GFP_KERNEL);
> +	priv->bus_desc.provider_name = devm_kstrdup(&pdev->dev, pdev->name, GFP_KERNEL);
> +	if (!priv->bus_desc.provider_name) {
> +		kfree(priv);
> +		return -ENOMEM;
> +	}
> +
>  	priv->bus_desc.module = THIS_MODULE;
>  	priv->bus_desc.of_node = np;
>  
> -- 
> 2.25.1
>