[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] RE: [PATCH 01/12] evtchn: refuse EVTCHNOP_status for Xen-bound event channels
> -----Original Message----- > From: Xen-devel <xen-devel-bounces@xxxxxxxxxxxxxxxxxxxx> On Behalf Of Jan > Beulich > Sent: 28 September 2020 11:56 > To: xen-devel@xxxxxxxxxxxxxxxxxxxx > Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>; George Dunlap > <George.Dunlap@xxxxxxxxxxxxx>; Ian > Jackson <iwj@xxxxxxxxxxxxxx>; Julien Grall <julien@xxxxxxx>; Wei Liu > <wl@xxxxxxx>; Stefano Stabellini > <sstabellini@xxxxxxxxxx> > Subject: [PATCH 01/12] evtchn: refuse EVTCHNOP_status for Xen-bound event > channels > > Callers have no business knowing the state of the Xen end of an event > channel. > > Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx> > Reviewed-by: Paul Durrant <Paul@xxxxxxx> > --- a/xen/common/event_channel.c > +++ b/xen/common/event_channel.c > @@ -933,6 +933,11 @@ int evtchn_status(evtchn_status_t *statu > } > > chn = evtchn_from_port(d, port); > + if ( consumer_is_xen(chn) ) > + { > + rc = -EACCES; > + goto out; > + } > > rc = xsm_evtchn_status(XSM_TARGET, d, chn); > if ( rc ) >
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