diff options
| author | Dan Carpenter <dan.carpenter@oracle.com> | 2013-03-01 09:14:19 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-03-15 22:45:16 +0400 |
| commit | bba90aedb00906a2f0d34325610729a1ee016f43 (patch) | |
| tree | 825d4e5fd91842776212a7a9975c0ef9c1886a7e /drivers/usb/storage | |
| parent | 39d35681d5380b403855202dcd75575a8d5b0ec1 (diff) | |
| download | linux-bba90aedb00906a2f0d34325610729a1ee016f43.tar.xz | |
usb: storage: onetouch: tighten a range check
Smatch complains because we only allocate ONETOUCH_PKT_LEN (2) bytes
but later when we call usb_fill_int_urb() we assume maxp can be up
to 8 bytes. I talked to the maintainer and maxp should be capped at
ONETOUCH_PKT_LEN.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/storage')
| -rw-r--r-- | drivers/usb/storage/onetouch.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/usb/storage/onetouch.c b/drivers/usb/storage/onetouch.c index cb79de61f4c8..26964895c88b 100644 --- a/drivers/usb/storage/onetouch.c +++ b/drivers/usb/storage/onetouch.c @@ -195,6 +195,7 @@ static int onetouch_connect_input(struct us_data *ss) pipe = usb_rcvintpipe(udev, endpoint->bEndpointAddress); maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe)); + maxp = min(maxp, ONETOUCH_PKT_LEN); onetouch = kzalloc(sizeof(struct usb_onetouch), GFP_KERNEL); input_dev = input_allocate_device(); @@ -245,8 +246,7 @@ static int onetouch_connect_input(struct us_data *ss) input_dev->open = usb_onetouch_open; input_dev->close = usb_onetouch_close; - usb_fill_int_urb(onetouch->irq, udev, pipe, onetouch->data, - (maxp > 8 ? 8 : maxp), + usb_fill_int_urb(onetouch->irq, udev, pipe, onetouch->data, maxp, usb_onetouch_irq, onetouch, endpoint->bInterval); onetouch->irq->transfer_dma = onetouch->data_dma; onetouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |