diff options
| author | David Woodhouse <dwmw2@infradead.org> | 2009-10-30 20:45:14 +0300 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2009-10-30 22:50:25 +0300 |
| commit | e9024a059f2c17fb2bfab212ee9d31511d7b8e57 (patch) | |
| tree | df915e4de67786102850f91e2b4deadf5fb10fe3 | |
| parent | 372362ade2fe5c33d749e017f1c5bc8140769a3e (diff) | |
| download | linux-e9024a059f2c17fb2bfab212ee9d31511d7b8e57.tar.xz | |
libertas if_usb: Fix crash on 64-bit machines
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>
Cc: stable@kernel.org
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
| -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 92bc8c5f1ca2..3fac4efa5ac8 100644 --- a/drivers/net/wireless/libertas/if_usb.c +++ b/drivers/net/wireless/libertas/if_usb.c @@ -508,7 +508,7 @@ 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); |