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Andrew Eikum 78e508c937 dix: Clear any existing selections before initializing privates 
If there is a selection left over from a previous execution of the
main loop, and that selection has privates allocated for it, the X
server will crash. This is because dixResetPrivates() resets the
privates refcounts to zero without accounting for the reference held
by the selection object. When the selection is then deleted in
InitSelections() after the call to dixResetPrivates(), the refcount
for its privates type goes negative and bad things happen.

To fix this, we should delete any existing selections before calling
dixResetPrivates(). This will properly release the selection's
privates and avoid the crash.

A more thorough description of the problem and a test case to
reproduce the crash is available at a previous mail:
  "Negative Selection devPrivates refcount?"
  By Andrew Eikum to xorg-devel on 10 Dec 2013
  http://lists.freedesktop.org/archives/xorg-devel/2013-December/039492.html

Signed-off-by: Andrew Eikum <aeikum@codeweavers.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Keith Packard <keithp@keithp.com>
 		2014-03-06 17:15:11 -08:00
Xext sync: Avoid ridiculously long timeouts 2014-02-09 10:41:18 +01:00
Xi Xi: check for invalid modifiers for XI2 passive grabs 2014-02-21 10:01:13 +10:00
composite composite: Remove duplicate window pixmap fetch 2014-01-22 19:56:32 -08:00
config Get rid of config/non-seat0.conf.multi-seat 2014-02-17 08:44:33 +10:00
damageext Replace 'pointer' type with 'void *' 2014-01-12 10:24:11 -08:00
dbe Replace 'pointer' type with 'void *' 2014-01-12 10:24:11 -08:00
dix dix: Clear any existing selections before initializing privates 2014-03-06 17:15:11 -08:00
doc doc: Update documentation about Windows platforms support a bit 2012-10-29 12:21:14 +00:00
dri3 Replace 'pointer' type with 'void *' 2014-01-12 10:24:11 -08:00
exa exa: Fix -Wshadow warnings 2014-01-22 19:56:32 -08:00
fb Replace 'pointer' type with 'void *' 2014-01-12 10:24:11 -08:00
glamor glamor: Add support for DRI3. 2014-03-05 13:10:24 -08:00
glx __glGetProcAddress: explictly cast function pointers to void * 2014-02-07 16:14:58 -08:00
hw glamor: Add support for DRI3. 2014-03-05 13:10:24 -08:00
include xorg: Build a glamor_egl module. 2014-03-05 13:10:17 -08:00
m4 xorg-tls: fix warning, replace AC_TRY_COMPILE with AC_COMPILE_IFELSE 2014-01-22 11:18:42 -08:00
man Correct description of -displayfd option in man page. 2012-10-11 12:53:57 +01:00
mi mi: fix printf warning about size_t format specifier 2014-02-10 07:02:34 +10:00
miext Replace 'pointer' type with 'void *' 2014-01-12 10:24:11 -08:00
os gcc 4.2.1 doesn't support #pragma GCC diagnostic ignored 2014-02-24 16:30:07 -08:00
present Replace 'pointer' type with 'void *' 2014-01-12 10:24:11 -08:00
pseudoramiX pseudoramiX: Add _X_ATTRIBUTE_PRINTF attributes to debug functions. 2014-01-27 11:38:34 -08:00
randr V2: Add check for link from output to crtc before optimizing out a CrtcSet call 2014-02-24 16:33:35 -08:00
record Clean up a few function prototypes to not place formals in /**/ 2014-01-12 10:24:12 -08:00
render Replace 'pointer' type with 'void *' 2014-01-12 10:24:11 -08:00
test Fix test/os to work on Solaris 2014-02-24 16:32:04 -08:00
xfixes Replace 'pointer' type with 'void *' 2014-01-12 10:24:11 -08:00
xkb xkb: add a call to init an XkbRMLVOSet from const chars 2014-02-04 10:53:59 +10:00
.dir-locals.el Add .dir-locals.el 2013-08-17 12:17:36 +02:00
.gitignore doc: relocate xserver.ent in the package root directory 2011-05-14 11:22:26 -07:00
COPYING Shadow: Switch the Amiga/Atari bitplane code to the canonical X.Org license 2013-05-14 14:41:00 -07:00
Makefile.am DIST_SUBDIRS needs to include glamor, even if it isn't built 2014-02-13 15:25:56 -08:00
README packaging: provide a default README file #24206 2010-01-27 14:00:17 -08:00
autogen.sh autogen.sh: Honor NOCONFIGURE=1 2012-10-19 13:12:33 +10:00
configure.ac xorg: Build a glamor_egl module. 2014-03-05 13:10:17 -08:00
devbook.am devbook.am: maintenance update from docbook.am 2011-09-21 14:07:52 -07:00
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
manpages.am Xdmx.man: Show actual configured XKB defaults instead of old hardcoded values 2011-06-21 17:54:14 -07:00
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

README 

					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:
http://en.wikipedia.org/wiki/X_server

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

        http://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

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

For patch submission instructions, see:

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

For more information on the git code manager, see:

        http://wiki.x.org/wiki/GitPage