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Olivier Fourdan 9f7a9be13d 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>
2017-12-06 11:59:28 -05:00
composite Use ARRAY_SIZE all over the tree 2017-10-30 13:45:20 -04:00
config config/udev: consider ID_INPUT_FOO=0 as 'unset' 2017-11-01 09:54:08 +10:00
damageext Use ARRAY_SIZE all over the tree 2017-10-30 13:45:20 -04:00
dbe dbe: Unvalidated variable-length request in ProcDbeGetVisualInfo (CVE-2017-12177) 2017-10-10 23:33:44 +02:00
dix dix: avoid deferencing NULL PtrCtrl 2017-12-06 11:59:28 -05:00
doc Rewrite the byte swapping macros. 2017-04-25 15:01:23 -07:00
dri3 Build: Use dri3proto/libdrm CFLAGS 2017-09-20 13:25:46 -04:00
exa Add a Meson build system alongside autotools. 2017-04-26 15:25:27 -07:00
fb fb: Check whether the window is enabled directly 2017-09-13 11:10:56 -04:00
glamor glamor: Drop the non-VAO rendering path 2017-11-15 09:53:50 -05:00
glx glx: Implement GLX_EXT_no_config_context (v2) 2017-12-04 11:22:44 -05:00
hw xwayland: Keep separate variables for pointer and tablet foci 2017-12-06 11:00:50 -05:00
include dix: Remove ffs.c 2017-11-06 17:22:46 -05:00
m4 Add ax_pthread.m4 to m4/ 2016-05-29 19:20:51 -07:00
man Xserver.man: document more transports for -nolisten & -listen options 2015-10-28 14:16:28 -04:00
mi dix: Remove ffs.c 2017-11-06 17:22:46 -05:00
miext sync: Clean up a bit of header formatting. 2017-09-20 13:19:27 -04:00
os os/xdmcp: Honour -once when session is dead 2017-11-29 14:50:12 -05:00
present present: Only send PresentCompleteNotify events to the presenting client 2017-11-23 10:28:06 +01:00
pseudoramiX Unvalidated lengths 2017-10-10 23:33:34 +02:00
randr randr: free crtc->outputs on destroy 2017-11-20 16:13:28 -05:00
record Add a Meson build system alongside autotools. 2017-04-26 15:25:27 -07:00
render Use ARRAY_SIZE all over the tree 2017-10-30 13:45:20 -04:00
test test: Add a test for the overflow bug in bigreqs. 2017-11-01 10:29:00 +10:00
Xext xres: Return the atom naming the type, not its internal type number 2017-11-14 16:02:49 -05:00
xfixes Use ARRAY_SIZE all over the tree 2017-10-30 13:45:20 -04:00
Xi Use ARRAY_SIZE all over the tree 2017-10-30 13:45:20 -04:00
xkb xkb: initialize tsyms 2017-11-06 16:49:11 -05:00
.appveyor.yml Add an .appveyor.yml for AppVeyor CI 2017-09-18 13:00:59 -04:00
.dir-locals.el Add .dir-locals.el 2013-08-17 12:17:36 +02:00
.gitignore .gitignore: Add new autotools file 'test-driver' 2014-04-21 13:41:42 -07:00
.travis.yml travis: Bump linux Dockerfile to v7 for new meson 2017-10-24 10:55:53 -04:00
autogen.sh autogen: Set a default subject prefix for patches 2016-02-08 17:41:38 -05:00
configure.ac dix: Remove ffs.c 2017-11-06 17:22:46 -05:00
COPYING modesetting: Merge modesetting's COPYING into the xserver's. 2014-09-15 12:46:02 -07:00
devbook.am doc: Create a script to filter xmlto output 2015-01-05 14:24:06 -08:00
docbook.am docbook.am: embed css styles inside the HTML HEAD element 2011-09-21 14:07:49 -07:00
fix-miregion Change region implementation names to eliminate the 'mi' prefix 2010-06-05 17:47:32 -07:00
fix-miregion-private Change region implementation names to eliminate the 'mi' prefix 2010-06-05 17:47:32 -07:00
fix-patch-whitespace Rename region macros to eliminate screen argument 2010-06-05 18:59:00 -07:00
fix-region Rename region macros to eliminate screen argument 2010-06-05 18:59:00 -07:00
Makefile.am automake: Add hw/xfree86/xkb/meson.build to EXTRA_DIST 2017-06-29 13:57:37 -04:00
manpages.am xorg: Change __XCONFIGFILE__ to XCONFIGFILE (and DIR) to fix scan.c. 2017-04-25 15:01:23 -07:00
meson_options.txt meson: Use [ true, false, auto ] for tristate values 2017-10-25 09:46:12 -04:00
meson.build meson: Use [ true, false, auto ] for tristate values 2017-10-25 09:46:12 -04:00
README README: Add link to fd.o CoC 2017-04-11 08:51:34 -04:00
xorg-server.m4 macros: clarify documentation 2012-11-05 13:24:57 -06:00
xorg-server.pc.in xfree86: link modules against Xorg symbols on Cygwin 2012-04-05 21:57:07 -05:00
xserver.ent.in doc: relocate xserver.ent in the package root directory 2011-05-14 11:22:26 -07:00

					X Server

The X server accepts requests from client applications to create windows,
which are (normally rectangular) "virtual screens" that the client program
can draw into.

Windows are then composed on the actual screen by the X server
(or by a separate composite manager) as directed by the window manager,
which usually communicates with the user via graphical controls such as buttons
and draggable titlebars and borders.

For a comprehensive overview of X Server and X Window System, consult the
following article:
https://en.wikipedia.org/wiki/X_server

All questions regarding this software should be directed at the
Xorg mailing list:

        https://lists.freedesktop.org/mailman/listinfo/xorg

Please submit bug reports to the Xorg bugzilla:

        https://bugs.freedesktop.org/enter_bug.cgi?product=xorg

The master development code repository can be found at:

        git://anongit.freedesktop.org/git/xorg/xserver

        https://cgit.freedesktop.org/xorg/xserver

For patch submission instructions, see:

	https://www.x.org/wiki/Development/Documentation/SubmittingPatches

For more information on the git code manager, see:

        https://wiki.x.org/wiki/GitPage

As with other projects hosted on freedesktop.org, X.Org follows its
Code of Conduct, based on the Contributor Covenant. Please conduct
yourself in a respectful and civilized manner when using the above
mailing lists, bug trackers, etc:

	https://www.freedesktop.org/wiki/CodeOfConduct