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xserver-multidpi/dix
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Olivier Fourdan 072dff8281 dix: avoid deferencing NULL PtrCtrl 
PtrCtrl really makes sense for relative pointing device only, absolute
devices such as touch devices do not have any PtrCtrl set.

In some cases, if the client issues a XGetPointerControl() immediatlely
after a ChangeMasterDeviceClasses() copied the touch device to the VCP,
a NULL pointer dereference will occur leading to a crash of Xwayland.

Check whether the PtrCtrl is not NULL in ProcGetPointerControl() and
return the default control values otherwise, to avoid the NULL pointer
dereference.

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1519533
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
(cherry picked from commit 9f7a9be13d)
2017-12-13 10:09:11 -05:00
..
.gitignore dix and os: gitignore dix.O and os.O 2011-09-23 17:14:47 -07:00
atom.c atom: make FreeAtom static 2015-07-08 16:41:29 -04:00
buildatoms XFree86 4.3.0.1 2003-11-14 16:49:22 +00:00
BuiltInAtoms R6.6 is the Xorg base-line 2003-11-14 15:54:54 +00:00
colormap.c configurable maximum number of clients 2015-08-24 00:00:18 -07:00
cursor.c dix: Work around non-premultiplied ARGB cursor data 2016-07-15 09:53:07 -04:00
devices.c dix: avoid deferencing NULL PtrCtrl 2017-12-13 10:09:11 -05:00
dispatch.c Unvalidated extra length in ProcEstablishConnection (CVE-2017-12176) 2017-10-12 12:25:41 -04:00
dispatch.h Drop trailing whitespaces 2014-11-12 10:25:00 +10:00
dixfonts.c Remove fd_set from Block/Wakeup handler API 2016-07-18 15:27:51 -04:00
dixutils.c Remove fd_set from Block/Wakeup handler API 2016-07-18 15:27:51 -04:00
enterleave.c dix: Don't update current time in the middle of input event processing 2016-06-01 10:31:52 -07:00
enterleave.h dix: Unexport various implementation details 2015-07-08 16:40:57 -04:00
eventconvert.c dix: send the current axis value in DeviceChangedEvents (#62321) 2013-05-07 09:40:42 +10:00
events.c dix: Disallow GenericEvent in SendEvent request. 2017-09-25 15:34:10 -04:00
extension.c Convert dix/* to new *allocarray functions 2015-04-21 16:57:08 -07:00
ffs.c Introduce a consistent coding style 2012-03-21 13:54:42 -07:00
gc.c Drop trailing whitespaces 2014-11-12 10:25:00 +10:00
getevents.c xwayland: Don't send KeyRelease events on wl_keyboard::leave 2017-01-11 14:58:44 -05:00
globals.c dix: Remove bogus input_mutex and input_mutex_count definitions from globals.c 2016-05-30 00:17:15 -07:00
glyphcurs.c Let calloc handle multiplication 2015-04-21 16:57:07 -07:00
grabs.c Convert dix/* to new *allocarray functions 2015-04-21 16:57:08 -07:00
initatoms.c Introduce a consistent coding style 2012-03-21 13:54:42 -07:00
inpututils.c dix: Add valuator_mask_set_absolute_unaccelerated 2016-10-05 13:46:29 -04:00
main.c XQuartz: Adopt input_lock() and input_unlock() 2016-09-22 14:55:02 -07:00
Makefile.am os,dix: Depend custom libs on libs, not objects 2017-01-11 15:01:36 -05:00
pixmap.c Revert "prime: Sync shared pixmap from root window instead of screen pixmap" 2017-03-10 10:56:15 -05:00
privates.c dix: Add dixPrivatesCreated helper function 2016-09-13 10:26:40 +02:00
property.c dix: Avoid writing uninitialized bytes in deliverPropertyNotifyEvent 2016-08-15 08:54:45 -07:00
protocol.txt protocol.txt: Add MIT-SHM 1.2 requests 2015-09-25 09:46:11 -04:00
ptrveloc.c Remove SIGIO support for input [v5] 2016-05-26 16:07:54 -07:00
region.c Convert dix/* to new *allocarray functions 2015-04-21 16:57:08 -07:00
registry.c Build required portions of registry.c automatically [v2] 2014-09-18 15:29:29 -07:00
resource.c dix: Bump MAXHASHSIZE for the resource db [v2] 2016-10-28 09:28:32 -07:00
selection.c dix: Push UpdateCurrentTimeIf down out of the main loop 2016-05-04 10:58:01 -04:00
stubmain.c Allow DDX to provide a main() 2013-07-23 23:56:58 +01:00
swaprep.c Drop trailing whitespaces 2014-11-12 10:25:00 +10:00
swapreq.c dix: Disallow GenericEvent in SendEvent request. 2017-09-25 15:34:10 -04:00
tables.c Drop trailing whitespaces 2014-11-12 10:25:00 +10:00
touch.c dix: Reallocate touchpoint buffer at input event time [v2] 2016-05-26 16:07:54 -07:00
window.c dix: Add hybrid full-size/empty-clip mode to SetRootClip 2016-02-22 13:26:31 -05:00
Xserver-dtrace.h.in dix: add dtrace probes to input API 2012-03-22 11:33:42 +10:00
Xserver.d Get rid of const warnings in XSERVER_INPUT_EVENT dtrace probe calls 2015-02-10 18:14:44 -08:00