diff options
| author | David Woodhouse <dwmw2@infradead.org> | 2009-10-30 17:45:14 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-11-09 16:52:10 -0800 |
| commit | 6e6276689ca89240c8faa575b64a36b356d7b8ab (patch) | |
| tree | ccbe96b849073672c9e62f76e64b5d42e2e62d6b | |
| parent | 30aae6d58a0cc3447ca149de5b73769d6206477a (diff) | |
libertas if_usb: Fix crash on 64-bit machines
commit e9024a059f2c17fb2bfab212ee9d31511d7b8e57 upstream.
On a 64-bit kernel, skb->tail is an offset, not a pointer. The libertas
usb driver passes it to usb_fill_bulk_urb() anyway, causing interesting
crashes. Fix that by using skb->data instead.
This highlights a problem with usb_fill_bulk_urb(). It doesn't notice
when dma_map_single() fails and return the error to its caller as it
should. In fact it _can't_ currently return the error, since it returns
void.
So this problem was showing up only at unmap time, after we'd already
suffered memory corruption by doing DMA to a bogus address.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/net/wireless/libertas/if_usb.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/wireless/libertas/if_usb.c b/drivers/net/wireless/libertas/if_usb.c index 632c291404ab..5e37c2f9d6cb 100644 --- a/drivers/net/wireless/libertas/if_usb.c +++ b/drivers/net/wireless/libertas/if_usb.c @@ -443,7 +443,7 @@ static int __if_usb_submit_rx_urb(struct if_usb_card *cardp, /* Fill the receive configuration URB and initialise the Rx call back */ usb_fill_bulk_urb(cardp->rx_urb, cardp->udev, usb_rcvbulkpipe(cardp->udev, cardp->ep_in), - (void *) (skb->tail + (size_t) IPFIELD_ALIGN_OFFSET), + skb->data + IPFIELD_ALIGN_OFFSET, MRVDRV_ETH_RX_PACKET_BUFFER_SIZE, callbackfn, cardp); |