On Fri, Oct 14, 2016 at 02:28:55PM +0100, Emil Velikov wrote: > On 13 October 2016 at 04:58, Peter Hutterer <[email protected]> wrote: > > We used to always set *ndevices to the number of devices returned by the > > server. This magically worked because we pretty much never returned an error > > except on faulty server or library implementations. With 19a9cd60 we now > > have > > more chances of getting an error, so the polite thing is to just leave > > *ndevices > > alone when we error out. > > > > Document it as such in the man page, just in case someone accidentally reads > > it. > > > > Signed-off-by: Peter Hutterer <[email protected]> > > CC: Niels Ole Salscheider <[email protected]> > > --- > > Changes to v1: > > - Niels' first patch set ndevices to 0, this one leaves it untouched > > > Slightly split between "doing the right thing" and "the cat is out of > the bag" ;-)
I don't think the cat is out of the bag anyway here. ndevices was *always* wrong in case of error. either it was untouched or set to the list of devices even though NULL was returned. the only reason this worked is because we never had an error. the cat remains thus firmly packaged, if (as usual) in an unclear state of vividness. > I'm leaning towards the former, although we might want to prod > Chromium devs and/or send them a patch ? the chromium code is broken, it cannot handle *any* error case. on the first call, the devices list is NULL and count is 0. XListInputDevices is fails, we currently get a NULL list but a count of != 0. Which will then crash when looping through the list and dereferencing the nonexistent members. At least with this fix, count stays on 0 and while XListInputDevices will get called every time, everything else should simply skip over any loop over the devices then (since count remains at 0). anyway, I just tried to file a bug, but "You need a Google Account associated with your email address in order to use the bug system." so there goes that idea. so now I'm just CC-ing the three most recent @chromium.org addresses from xorg-devel and cross my fingers and hope :) Cheers, Peter _______________________________________________ [email protected]: X.Org development Archives: http://lists.x.org/archives/xorg-devel Info: https://lists.x.org/mailman/listinfo/xorg-devel
