Re: [PATCH] can: ems_usb: ems_usb_read_bulk_callback(): check the proper length of a message

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

On Mon, Mar 02, 2026 at 11:06:34AM +0100, Marc Kleine-Budde wrote:
> On 23.02.2026 17:51:17, Greg Kroah-Hartman wrote:
> > When looking at the data in a USB urb, the actual_length is the size of
> > the buffer passed to the driver, not the transfer_buffer_length which is
> > set by the driver as the max size of the buffer.
> >
> > When parsing the messages in ems_usb_read_bulk_callback() properly check
> > the size both at the beginning of parsing the message to make sure it is
> > big enough for the expected structure, and at the end of the message to
> > make sure we don't overflow past the end of the buffer for the next
> > message.
> >
> > Cc: Vincent Mailhol <mailhol@kernel.org>
> > Cc: Marc Kleine-Budde <mkl@pengutronix.de>
> > Cc: stable <stable@kernel.org>
> > Assisted-by: gkh_clanker_2000
> > Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> 
> Applied to linux-can, with preferred stable format.

What is your "preferred stable format"?