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TouchListenerAcceptReject: Warn and return early on bad listener index

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Signed-off-by: Chase Douglas <chase.douglas@canonical.com>
Reviewed-by: Bryce Harrington <bryce@canonical.com>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
(cherry picked from commit 5c361d59c5)
This commit is contained in:
Chase Douglas 2012-04-20 11:08:15 -07:00 • committed by Peter Hutterer
parent ed33772a0d
commit 345761be71
1 changed files with 5 additions and 0 deletions
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5
dix/touch.c
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@ -966,6 +966,11 @@ TouchListenerAcceptReject(DeviceIntPtr dev, TouchPointInfoPtr ti, int listener,
int nev;
int i;
BUG_WARN(listener < 0);
BUG_WARN(listener >= ti->num_listeners);
if (listener < 0 || listener >= ti->num_listeners)
return BadMatch;
if (listener > 0) {
if (mode == XIRejectTouch)
TouchRejected(dev, ti, ti->listeners[listener].listener, NULL);