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XLibre Xserver
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Olivier Fourdan f40ff18c96 glamor: Check for NULL pixmap in glamor_get_pixmap_texture() 
glamor_create_pixmap() would return a NullPixmap if the given size is
larger than the maximum size of a pixmap.

But glamor_get_pixmap_texture() won't check if the given pixmap is
non-null, leading to a segfault if glamor_create_pixmap() failed.

This can be reproduced by passing Xephyr a very large screen width,
e.g.:

 $ Xephyr -glamor -screen 32768x1024 :10

 (EE)
 (EE) Backtrace:
 (EE) 0: Xephyr (OsSigHandler+0x29)
 (EE) 1: /lib64/libpthread.so.0 (__restore_rt+0x0)
 (EE) 2: Xephyr (glamor_get_pixmap_texture+0x30)
 (EE) 3: Xephyr (ephyr_glamor_create_screen_resources+0xc6)
 (EE) 4: Xephyr (ephyrCreateResources+0x98)
 (EE) 5: Xephyr (dix_main+0x275)
 (EE) 6: /lib64/libc.so.6 (__libc_start_main+0xf1)
 (EE) 7: Xephyr (_start+0x2a)
 (EE) 8: ? (?+0x2a) [0x2a]
 (EE)
 (EE) Segmentation fault at address 0x0
 (EE)
 Fatal server error:
 (EE) Caught signal 11 (Segmentation fault). Server aborting
 (EE)
 Aborted (core dumped)

Bugzilla: https://bugzilla.redhat.com/1431633
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
 		2017-03-15 15:36:44 -04:00
Xext dispatch: Mark swapped dispatch as _X_COLD 2017-03-01 10:16:20 -05:00
Xi dispatch: Mark swapped dispatch as _X_COLD 2017-03-01 10:16:20 -05:00
composite dispatch: Mark swapped dispatch as _X_COLD 2017-03-01 10:16:20 -05:00
config ddx: add new call to purge input devices that weren't added 2016-10-26 15:35:07 +10:00
damageext dispatch: Mark swapped dispatch as _X_COLD 2017-03-01 10:16:20 -05:00
dbe dispatch: Mark swapped dispatch as _X_COLD 2017-03-01 10:16:20 -05:00
dix dispatch: Mark swapped dispatch as _X_COLD 2017-03-01 10:16:20 -05:00
doc Remove readmask from screen block/wakeup handler 2016-07-18 15:27:51 -04:00
dri3 dispatch: Mark swapped dispatch as _X_COLD 2017-03-01 10:16:20 -05:00
exa Remove readmask from screen block/wakeup handler 2016-07-18 15:27:51 -04:00
fb fb: Remove stray references to fbHasVisualTypes 2017-02-16 15:10:30 -05:00
glamor glamor: Check for NULL pixmap in glamor_get_pixmap_texture() 2017-03-15 15:36:44 -04:00
glx glx: Move Composite's synthetic visuals to a different select group 2017-01-25 11:27:33 -05:00
hw xfree86: work around a sdksyms problem with gcc5 on Cygwin 2017-03-14 11:51:37 -04:00
include glamor: use drmGetDeviceNameFromFD2 when available 2017-03-07 16:00:27 -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 miarc: "Cache" arc span data for dashed arcs 2017-03-02 11:08:39 -05:00
miext damage: Validate source pictures bound to windows before unwrapping 2017-02-08 12:54:47 -05:00
os os: Squash missing declaration warning for timingsafe_memcmp 2017-03-02 17:20:30 -05:00
present dispatch: Mark swapped dispatch as _X_COLD 2017-03-01 10:16:20 -05:00
pseudoramiX Convert top level extensions to new *allocarray functions 2015-04-21 16:57:08 -07:00
randr dispatch: Mark swapped dispatch as _X_COLD 2017-03-01 10:16:20 -05:00
record dispatch: Mark swapped dispatch as _X_COLD 2017-03-01 10:16:20 -05:00
render render: Fix out of boundary heap access 2017-03-13 16:54:20 -04:00
test test: Fix distcheck failures 2017-03-14 12:28:24 -04:00
xfixes dispatch: Mark swapped dispatch as _X_COLD 2017-03-01 10:16:20 -05:00
xkb dispatch: Mark swapped dispatch as _X_COLD 2017-03-01 10:16:20 -05:00
.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
COPYING modesetting: Merge modesetting's COPYING into the xserver's. 2014-09-15 12:46:02 -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: Set a default subject prefix for patches 2016-02-08 17:41:38 -05:00
configure.ac glamor: use drmGetDeviceNameFromFD2 when available 2017-03-07 16:00:27 -05:00
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
manpages.am Xorg: Add a suid root wrapper 2014-03-12 08:50:05 +01:00
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