linux-kernel - Re: [PATCH v3 01/10] software node: Get reference to parent swnode in get

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: <20190830123307.GA2680@smile.fi.intel.com>
Date:   Fri, 30 Aug 2019 15:33:07 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Sakari Ailus <sakari.ailus@...ux.intel.com>
Cc:     Petr Mladek <pmladek@...e.com>, linux-kernel@...r.kernel.org,
        rafael@...nel.org, linux-acpi@...r.kernel.org,
        devicetree@...r.kernel.org, Rob Herring <robh@...nel.org>
Subject: Re: [PATCH v3 01/10] software node: Get reference to parent swnode
 in get_parent op

On Thu, Aug 29, 2019 at 01:10:34PM +0300, Sakari Ailus wrote:
> The software_node_get_parent() returned a pointer to the parent swnode,
> but did not take a reference to it, leading the caller to put a reference
> that was not taken. Take that reference now.
> 
> Fixes: 59abd83672f7 ("drivers: base: Introducing software nodes to the
> 		      firmware node framework")

Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

> Signed-off-by: Sakari Ailus <sakari.ailus@...ux.intel.com>
> ---
>  drivers/base/swnode.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/base/swnode.c b/drivers/base/swnode.c
> index e7b3aa3bd55ad..a7cb41812cfda 100644
> --- a/drivers/base/swnode.c
> +++ b/drivers/base/swnode.c
> @@ -520,7 +520,10 @@ software_node_get_parent(const struct fwnode_handle *fwnode)
>  {
>  	struct swnode *swnode = to_swnode(fwnode);
>  
> -	return swnode ? (swnode->parent ? &swnode->parent->fwnode : NULL) : NULL;
> +	if (!swnode || !swnode->parent)
> +		return NULL;
> +
> +	return fwnode_handle_get(&swnode->parent->fwnode);
>  }
>  
>  static struct fwnode_handle *
> -- 
> 2.20.1
> 

-- 
With Best Regards,
Andy Shevchenko