The address cannot be negative so make it unsigned. Also, an unsigned int is always sufficient for the length, so no need to overdo it with a size_t. Finally, add in range checks to see if the values passed in actually fit where they are used.
Signed-off-by: Chris Rorvick chris@rorvick.com --- This was dropped from an earlier series ("Cleanup reads/writes to Line 6 device memory".) This version leaves the arguements wide (within reason) and does range checking.
Regards,
Chris
sound/usb/line6/driver.c | 14 ++++++++++---- sound/usb/line6/driver.h | 8 ++++---- 2 files changed, 14 insertions(+), 8 deletions(-)
diff --git a/sound/usb/line6/driver.c b/sound/usb/line6/driver.c index 99b63a7..4f82b57 100644 --- a/sound/usb/line6/driver.c +++ b/sound/usb/line6/driver.c @@ -302,14 +302,17 @@ static void line6_data_received(struct urb *urb) /* Read data from device. */ -int line6_read_data(struct usb_line6 *line6, int address, void *data, - size_t datalen) +int line6_read_data(struct usb_line6 *line6, unsigned address, void *data, + unsigned datalen) { struct usb_device *usbdev = line6->usbdev; int ret; unsigned char len; unsigned count;
+ if (address > 0xffff || datalen > 0xff) + return EINVAL; + /* query the serial number: */ ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0), 0x67, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT, @@ -370,14 +373,17 @@ EXPORT_SYMBOL_GPL(line6_read_data); /* Write data to device. */ -int line6_write_data(struct usb_line6 *line6, int address, void *data, - size_t datalen) +int line6_write_data(struct usb_line6 *line6, unsigned address, void *data, + unsigned datalen) { struct usb_device *usbdev = line6->usbdev; int ret; unsigned char status; int count;
+ if (address > 0xffff || datalen > 0xffff) + return EINVAL; + ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0), 0x67, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT, 0x0022, address, data, datalen, diff --git a/sound/usb/line6/driver.h b/sound/usb/line6/driver.h index 5d20294..7da643e 100644 --- a/sound/usb/line6/driver.h +++ b/sound/usb/line6/driver.h @@ -147,8 +147,8 @@ struct usb_line6 {
extern char *line6_alloc_sysex_buffer(struct usb_line6 *line6, int code1, int code2, int size); -extern int line6_read_data(struct usb_line6 *line6, int address, void *data, - size_t datalen); +extern int line6_read_data(struct usb_line6 *line6, unsigned address, + void *data, unsigned datalen); extern int line6_read_serial_number(struct usb_line6 *line6, u32 *serial_number); extern int line6_send_raw_message_async(struct usb_line6 *line6, @@ -161,8 +161,8 @@ extern void line6_start_timer(struct timer_list *timer, unsigned long msecs, void (*function)(unsigned long), unsigned long data); extern int line6_version_request_async(struct usb_line6 *line6); -extern int line6_write_data(struct usb_line6 *line6, int address, void *data, - size_t datalen); +extern int line6_write_data(struct usb_line6 *line6, unsigned address, + void *data, unsigned datalen);
int line6_probe(struct usb_interface *interface, const struct usb_device_id *id,