4.9-stable review patch. If anyone has any objections, please let me know.
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From: Oliver Neukum oneukum@suse.com
commit 446f666da9f019ce2ffd03800995487e79a91462 upstream.
USBDEVFS_URB_ISO_ASAP must be accepted only for ISO endpoints. Improve sanity checking.
Reported-by: Andrey Konovalov andreyknvl@google.com Signed-off-by: Oliver Neukum oneukum@suse.com Acked-by: Alan Stern stern@rowland.harvard.edu Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/usb/core/devio.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-)
--- a/drivers/usb/core/devio.c +++ b/drivers/usb/core/devio.c @@ -1454,14 +1454,18 @@ static int proc_do_submiturb(struct usb_ 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_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)