USBDEVFS_URB_ISO_ASAP must be accepted only for ISO endpoints. Improve sanity checking.
Reported-by: andreyknvl@google.com Signed-off-by: Oliver Neukum oneukum@suse.com CC: stable@vger.kernel.org --- drivers/usb/core/devio.c | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-)
diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c index 705c573d0257..701ddada389a 100644 --- a/drivers/usb/core/devio.c +++ b/drivers/usb/core/devio.c @@ -1442,14 +1442,18 @@ static int proc_do_submiturb(struct usb_dev_state *ps, struct usbdevfs_urb *uurb int number_of_packets = 0; unsigned int stream_id = 0; void *buf; - - if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP | - USBDEVFS_URB_SHORT_NOT_OK | + unsigned long mask = USBDEVFS_URB_SHORT_NOT_OK | USBDEVFS_URB_BULK_CONTINUATION | USBDEVFS_URB_NO_FSBR | - USBDEVFS_URB_ZERO_PACKET | - USBDEVFS_URB_NO_INTERRUPT)) - return -EINVAL; + USBDEVFS_URB_ZERO_PACKET | + USBDEVFS_URB_NO_INTERRUPT; + /* USBDEVFS_URB_ISO_ASAP is a special case */ + if (uurb->type == USBDEVFS_URB_TYPE_ISO) + mask |= USBDEVFS_URB_ISO_ASAP; + + if (uurb->flags & ~mask) + return -EINVAL; + if ((unsigned int)uurb->buffer_length >= USBFS_XFER_MAX) return -EINVAL; if (uurb->buffer_length > 0 && !uurb->buffer)