On Fri, 1 Aug 2014, Oliver Neukum wrote: > On Fri, 2014-08-01 at 10:24 -0400, Alan Stern wrote: > > On Fri, 1 Aug 2014, Oliver Neukum wrote: > > > > > usbfs allows user space to pass down an URB which sets URB_SHORT_NOT_OK > > > for output URBs. That causes usbcore to log messages without limit > > > for a nonsensical disallowed combination. The fix is to silently drop > > > the attribute in usbfs. > > > The problem is reported to exist since 3.14 > > > https://www.virtualbox.org/ticket/13085 > > > > > > Signed-off-by: Oliver Neukum <oneukum@xxxxxxx> > > > CC: stable@xxxxxxxxxxxxxxx > > > --- > > > drivers/usb/core/devio.c | 2 +- > > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > > > diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c > > > index 257876e..0b59731 100644 > > > --- a/drivers/usb/core/devio.c > > > +++ b/drivers/usb/core/devio.c > > > @@ -1509,7 +1509,7 @@ static int proc_do_submiturb(struct usb_dev_state *ps, struct usbdevfs_urb *uurb > > > u = (is_in ? URB_DIR_IN : URB_DIR_OUT); > > > if (uurb->flags & USBDEVFS_URB_ISO_ASAP) > > > u |= URB_ISO_ASAP; > > > - if (uurb->flags & USBDEVFS_URB_SHORT_NOT_OK) > > > + if (uurb->flags & USBDEVFS_URB_SHORT_NOT_OK && is_in) > > > u |= URB_SHORT_NOT_OK; > > > if (uurb->flags & USBDEVFS_URB_NO_FSBR) > > > u |= URB_NO_FSBR; > > > > Acked-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> > > > > Do you want to put in a one-time warning, so that people will be aware > > of these mistakes and are motivated to fix them? > > We used to allow this silently. And the combination is not really > harmful, only sort of redundant. Was that a genuine question or a > request? It was a real question. You're right that this is a pretty unimportant kind of error. The question is whether anybody cares enough to want to fix it. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
