From 3093f78d17e48a506aab170a9089cd10e21af299 Mon Sep 17 00:00:00 2001 From: Peter Hutterer Date: Fri, 3 May 2013 15:02:05 +1000 Subject: [PATCH] dix: free the old grab when activating a new grab A client may call XIGrabDevice twice, overwriting the existing grab. Thus, make sure we free the old copy after we copied it. Free it last, to make sure our refcounts don't run to 0 and inadvertantly free something on the way. Signed-off-by: Peter Hutterer --- dix/events.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/dix/events.c b/dix/events.c index 76bc555..7464db5 100644 --- a/dix/events.c +++ b/dix/events.c @@ -1468,6 +1468,7 @@ ActivatePointerGrab(DeviceIntPtr mouse, GrabPtr grab, TimeStamp time, Bool autoGrab) { GrabInfoPtr grabinfo = &mouse->deviceGrab; + GrabPtr oldgrab = grabinfo->grab; WindowPtr oldWin = (grabinfo->grab) ? grabinfo->grab->window : mouse->spriteInfo->sprite->win; Bool isPassive = autoGrab & ~ImplicitGrabMask; @@ -1500,6 +1501,8 @@ ActivatePointerGrab(DeviceIntPtr mouse, GrabPtr grab, UpdateTouchesForGrab(mouse); CheckGrabForSyncs(mouse, (Bool) grab->pointerMode, (Bool) grab->keyboardMode); + if (oldgrab) + FreeGrab(oldgrab); } /** @@ -1570,6 +1573,7 @@ ActivateKeyboardGrab(DeviceIntPtr keybd, GrabPtr grab, TimeStamp time, Bool passive) { GrabInfoPtr grabinfo = &keybd->deviceGrab; + GrabPtr oldgrab = grabinfo->grab; WindowPtr oldWin; /* slave devices need to float for the duration of the grab. */ @@ -1595,12 +1599,13 @@ ActivateKeyboardGrab(DeviceIntPtr keybd, GrabPtr grab, TimeStamp time, grabinfo->grabTime = syncEvents.time; else grabinfo->grabTime = time; - BUG_WARN(grabinfo->grab != NULL); grabinfo->grab = AllocGrab(grab); grabinfo->fromPassiveGrab = passive; grabinfo->implicitGrab = passive & ImplicitGrabMask; CheckGrabForSyncs(keybd, (Bool) grab->keyboardMode, (Bool) grab->pointerMode); + if (oldgrab) + FreeGrab(oldgrab); } /** -- 2.7.4