Alexey Khoroshilov <khoroshi...@ispras.ru> schrieb:
>There is spare code with obvious misprint in ems_usb_start_xmit():
>usb_free_urb() should be used to deallocate urb instead of
>usb_unanchor_urb().
>
>Found by Linux Driver Verification project (linuxtesting.org).
>
>Signed-off-by: Alexey Khoroshilov <khoroshi...@ispras.ru>
>---
> drivers/net/can/usb/ems_usb.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
>diff --git a/drivers/net/can/usb/ems_usb.c
>b/drivers/net/can/usb/ems_usb.c
>index 5f9a7ad9b964..beae1ec255f4 100644
>--- a/drivers/net/can/usb/ems_usb.c
>+++ b/drivers/net/can/usb/ems_usb.c
>@@ -798,7 +798,7 @@ static netdev_tx_t ems_usb_start_xmit(struct
>sk_buff *skb, struct net_device *ne
> * allowed (MAX_TX_URBS).
> */
> if (!context) {
>- usb_unanchor_urb(urb);
>+ usb_free_urb(urb);
> usb_free_coherent(dev->udev, size, buf, urb->transfer_dma);
>
looks like you are introducing a new use after free problem here ...
> netdev_warn(netdev, "couldn't find free context\n");
--
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