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authorDavid Woodhouse <dwmw2@infradead.org>2009-10-30 17:45:14 +0000
committerJohn W. Linville <linville@tuxdriver.com>2009-10-30 15:50:25 -0400
commite9024a059f2c17fb2bfab212ee9d31511d7b8e57 (patch)
treedf915e4de67786102850f91e2b4deadf5fb10fe3
parent372362ade2fe5c33d749e017f1c5bc8140769a3e (diff)
downloadvexpress-lsk-e9024a059f2c17fb2bfab212ee9d31511d7b8e57.tar.gz
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.c2
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 92bc8c5f1ca..3fac4efa5ac 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);