Re: [PATCH can v2] can: gs_usb: gs_usb_receive_bulk_callback(): fix URB memory leak

[Marc Kleine-Budde]

On 05.01.2026 13:35:54, Marc Kleine-Budde wrote:
> In gs_can_open(), the URBs for USB-in transfers are allocated, added to the
> parent->rx_submitted anchor and submitted. In the complete callback
> gs_usb_receive_bulk_callback(), the URB is processed and resubmitted. In
> gs_can_close() the URBs are freed by calling
> usb_kill_anchored_urbs(parent->rx_submitted).
>
> However, this does not take into account that the USB framework
> unanchors the URB before the close function is called. This means that
> once an in-URB has been completed, it is no longer anchored and is
> ultimately not released in gs_can_close().
>
> Fix the memory leak by anchoring the URB in the
> gs_usb_receive_bulk_callback() to the parent->rx_submitted anchor.
>
> Fixes: d08e973a77d1 ("can: gs_usb: Added support for the GS_USB CAN devices")
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>

applied to linux-can

Marc

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