Re: [PATCH] modules: add modalias file to sysfs for modules.

[Greg Kroah-Hartman]

On Mon, Nov 28, 2022 at 02:13:32PM -0600, Allen Webb wrote:
> USB devices support the authorized attribute which can be used by
> user-space to implement trust-based systems for enabling USB devices. It
> would be helpful when building these systems to be able to know in
> advance which kernel drivers (or modules) are reachable from a
> particular USB device.
> 
> This information is readily available for external modules in
> modules.alias. However, builtin kernel modules are not covered. This
> patch adds a sys-fs attribute to both builtin and loaded modules
> exposing the matching rules in the modalias format for integration
> with tools like USBGuard.
> 
> Signed-off-by: Allen Webb <allenwebb@xxxxxxxxxx>
> ---
>  drivers/base/Makefile          |   2 +-
>  drivers/base/base.h            |   8 ++
>  drivers/base/bus.c             |  42 ++++++
>  drivers/base/mod_devicetable.c | 247 +++++++++++++++++++++++++++++++++
>  drivers/usb/core/driver.c      |   2 +
>  include/linux/device/bus.h     |   8 ++
>  include/linux/module.h         |   1 +
>  kernel/module/internal.h       |   2 +
>  kernel/module/sysfs.c          | 100 +++++++++++++
>  kernel/params.c                |   2 +
>  10 files changed, 413 insertions(+), 1 deletion(-)
>  create mode 100644 drivers/base/mod_devicetable.c

Hi,

This is the friendly patch-bot of Greg Kroah-Hartman.  You have sent him
a patch that has triggered this response.  He used to manually respond
to these common problems, but in order to save his sanity (he kept
writing the same thing over and over, yet to different people), I was
created.  Hopefully you will not take offence and will fix the problem
in your patch and resubmit it so that it can be accepted into the Linux
kernel tree.

You are receiving this message because of the following common error(s)
as indicated below:

- This looks like a new version of a previously submitted patch, but you
  did not list below the --- line any changes from the previous version.
  Please read the section entitled "The canonical patch format" in the
  kernel file, Documentation/SubmittingPatches for what needs to be done
  here to properly describe this.

If you wish to discuss this problem further, or you have questions about
how to resolve this issue, please feel free to respond to this email and
Greg will reply once he has dug out from the pending patches received
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thanks,

greg k-h's patch email bot