Messages in this thread | | | Date | Sat, 07 Dec 2013 12:42:54 +0100 | From | Oliver Hartkopp <> | Subject | Re: [PATCH] can: ems_usb: fix urb leaks on failure paths |
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Hello Alexey,
looks better :-)
I added the author of this driver to double check the patch and for his Acked-by ...
@Sebastian: Would you like to update your e-mail address too?
Best regards, Oliver
On 07.12.2013 00:10, Alexey Khoroshilov wrote: > There are a couple failure paths where urb leaks. > Is spare code within ems_usb_start_xmit(), > usb_free_urb() should be used to deallocate urb instead of usb_unanchor_urb(). > In ems_usb_start() there is no usb_free_urb() if usb_submit_urb() fails. > > Found by Linux Driver Verification project (linuxtesting.org). > > Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru> > --- > drivers/net/can/usb/ems_usb.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/drivers/net/can/usb/ems_usb.c b/drivers/net/can/usb/ems_usb.c > index 5f9a7ad9b964..8aeec0b4601a 100644 > --- a/drivers/net/can/usb/ems_usb.c > +++ b/drivers/net/can/usb/ems_usb.c > @@ -625,6 +625,7 @@ static int ems_usb_start(struct ems_usb *dev) > usb_unanchor_urb(urb); > usb_free_coherent(dev->udev, RX_BUFFER_SIZE, buf, > urb->transfer_dma); > + usb_free_urb(urb); > break; > } > > @@ -798,8 +799,8 @@ 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_coherent(dev->udev, size, buf, urb->transfer_dma); > + usb_free_urb(urb); > > netdev_warn(netdev, "couldn't find free context\n"); > >
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