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authorDan Carpenter <dan.carpenter@oracle.com>2013-03-01 08:14:19 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-03-15 11:45:16 -0700
commitbba90aedb00906a2f0d34325610729a1ee016f43 (patch)
tree825d4e5fd91842776212a7a9975c0ef9c1886a7e /drivers/usb/storage
parent39d35681d5380b403855202dcd75575a8d5b0ec1 (diff)
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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.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/usb/storage/onetouch.c b/drivers/usb/storage/onetouch.c
index cb79de6..2696489 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;