| Message ID | 20221203133159.94414-6-mailhol.vincent@wanadoo.fr (mailing list archive) |
|---|---|
| State | Superseded |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | can: usb: remove all usb_set_intfdata(intf, NULL) in drivers' disconnect() | expand |
| Context | Check | Description |
|---|---|---|
| netdev/tree_selection | success | Series ignored based on subject |
diff --git a/drivers/net/can/usb/mcba_usb.c b/drivers/net/can/usb/mcba_usb.c index 47619e9cb005..a21c1ad4894f 100644 --- a/drivers/net/can/usb/mcba_usb.c +++ b/drivers/net/can/usb/mcba_usb.c @@ -890,8 +890,6 @@ static void mcba_usb_disconnect(struct usb_interface *intf) { struct mcba_priv *priv = usb_get_intfdata(intf); - usb_set_intfdata(intf, NULL); - netdev_info(priv->netdev, "device disconnected\n"); unregister_candev(priv->netdev);
mcba_usb sets the usb_interface to NULL before waiting for the completion of outstanding urbs. This can result in NULL pointer dereference, c.f. [1] and [2]. Remove the call to usb_set_intfdata(intf, NULL). The core will take care of setting it to NULL after mcba_usb_disconnect() at [3]. [1] commit 27ef17849779 ("usb: add usb_set_intfdata() documentation") Link: https://git.kernel.org/gregkh/usb/c/27ef17849779 [2] thread about usb_set_intfdata() on linux-usb mailing. Link: https://lore.kernel.org/linux-usb/Y4OD70GD4KnoRk0k@rowland.harvard.edu/ [3] function usb_unbind_interface() from drivers/usb/core/driver.c Link: https://elixir.bootlin.com/linux/v6.0/source/drivers/usb/core/driver.c#L497 Fixes: 51f3baad7de9 ("can: mcba_usb: Add support for Microchip CAN BUS Analyzer") Signed-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr> --- drivers/net/can/usb/mcba_usb.c | 2 -- 1 file changed, 2 deletions(-)