linux-kernel - Re: [PATCH v1 1/3] usb: typec: Separate USB Power Delivery from USB Type-C

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:   Thu, 3 Feb 2022 15:55:19 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Cc:     Guenter Roeck <linux@...ck-us.net>,
        Benson Leung <bleung@...gle.com>,
        Prashant Malani <pmalani@...omium.org>,
        Jameson Thies <jthies@...gle.com>,
        "Regupathy, Rajaram" <rajaram.regupathy@...el.com>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 1/3] usb: typec: Separate USB Power Delivery from USB
 Type-C

On Thu, Feb 03, 2022 at 05:46:55PM +0300, Heikki Krogerus wrote:
> +/* These additional details are only available with vSafe5V supplies */
> +static struct kobj_attribute dual_role_power_attr = __ATTR_RO(dual_role_power);
> +static struct kobj_attribute usb_suspend_supported_attr = __ATTR_RO(usb_suspend_supported);
> +static struct kobj_attribute unconstrained_power_attr = __ATTR_RO(unconstrained_power);
> +static struct kobj_attribute usb_communication_capable_attr = __ATTR_RO(usb_communication_capable);
> +static struct kobj_attribute dual_role_data_attr = __ATTR_RO(dual_role_data);
> +static struct kobj_attribute
> +unchunked_extended_messages_supported_attr = __ATTR_RO(unchunked_extended_messages_supported);

Note, no 'struct device' should ever have a "raw" kobject hanging off of
it.  If so, something went wrong.

If you do this, userspace will never be notified of the attributes and
any userspace representation of the tree will be messed up.

Please, use an attribute directory with a name, or if you really need to
go another level deep, use a real 'struct device'.  As-is here, I can't
take it.

thanks,

greg k-h