aa6f84021a
A change during the 1.20 development cycle resulted in fbconfigs being walked
and deallocated individually during __glXScreenDestroy. This change
now avoids a use-after-free caused by that change.
==50859==ERROR: AddressSanitizer: heap-use-after-free on address 0x00010d3819c8 at pc 0x0001009d4230 bp 0x00016feca7a0 sp 0x00016feca798
READ of size 8 at 0x00010d3819c8 thread T5
#0 0x1009d422c in __glXScreenDestroy glxscreens.c:448
#1 0x10091cc98 in __glXAquaScreenDestroy indirect.c:510
#2 0x1009d2734 in glxCloseScreen glxscreens.c:169
#3 0x100740a24 in dix_main main.c:325
#4 0x10023ed50 in server_thread quartzStartup.c:65
#5 0x199ae7fd0 in _pthread_start+0x13c (libsystem_pthread.dylib:arm64e+0x6fd0)
#6 0x199ae2d38 in thread_start+0x4 (libsystem_pthread.dylib:arm64e+0x1d38)
0x00010d3819c8 is located 200 bytes inside of 12800-byte region [0x00010d381900,0x00010d384b00)
freed by thread T5 here:
#0 0x101477ba8 in wrap_free+0x98 (libclang_rt.asan_osx_dynamic.dylib:arm64e+0x3fba8)
#1 0x1009d4240 in __glXScreenDestroy glxscreens.c:449
#2 0x10091cc98 in __glXAquaScreenDestroy indirect.c:510
#3 0x1009d2734 in glxCloseScreen glxscreens.c:169
#4 0x100740a24 in dix_main main.c:325
#5 0x10023ed50 in server_thread quartzStartup.c:65
#6 0x199ae7fd0 in _pthread_start+0x13c (libsystem_pthread.dylib:arm64e+0x6fd0)
#7 0x199ae2d38 in thread_start+0x4 (libsystem_pthread.dylib:arm64e+0x1d38)
previously allocated by thread T5 here:
#0 0x101477e38 in wrap_calloc+0x9c (libclang_rt.asan_osx_dynamic.dylib:arm64e+0x3fe38)
#1 0x100925a40 in __glXAquaCreateVisualConfigs visualConfigs.c:116
#2 0x10091cb24 in __glXAquaScreenProbe+0x224 (X11.bin:arm64+0x100730b24)
#3 0x1009cd840 in xorgGlxServerInit glxext.c:528
#4 0x10074539c in _CallCallbacks dixutils.c:743
#5 0x100932a70 in CallCallbacks callback.h:83
#6 0x100932478 in GlxExtensionInit vndext.c:244
#7 0x10020a364 in InitExtensions miinitext.c:267
#8 0x10073fe7c in dix_main main.c:197
#9 0x10023ed50 in server_thread quartzStartup.c:65
#10 0x199ae7fd0 in _pthread_start+0x13c (libsystem_pthread.dylib:arm64e+0x6fd0)
#11 0x199ae2d38 in thread_start+0x4 (libsystem_pthread.dylib:arm64e+0x1d38)
Regressed-in:
|
||
|---|---|---|
| .gitlab-ci | ||
| composite | ||
| config | ||
| damageext | ||
| dbe | ||
| dix | ||
| doc | ||
| dri3 | ||
| exa | ||
| fb | ||
| glamor | ||
| glx | ||
| hw | ||
| include | ||
| m4 | ||
| man | ||
| mi | ||
| miext | ||
| os | ||
| present | ||
| pseudoramiX | ||
| randr | ||
| record | ||
| render | ||
| test | ||
| Xext | ||
| xfixes | ||
| Xi | ||
| xkb | ||
| .appveyor.yml | ||
| .dir-locals.el | ||
| .gitignore | ||
| .gitlab-ci.yml | ||
| .travis.yml | ||
| autogen.sh | ||
| configure.ac | ||
| COPYING | ||
| devbook.am | ||
| docbook.am | ||
| fix-miregion | ||
| fix-miregion-private | ||
| fix-patch-whitespace | ||
| fix-region | ||
| Makefile.am | ||
| manpages.am | ||
| meson_options.txt | ||
| meson.build | ||
| README.md | ||
| xorg-server.m4 | ||
| xorg-server.pc.in | ||
| xserver.ent.in | ||
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
The master development code repository can be found at:
https://gitlab.freedesktop.org/xorg/xserver
For patch submission instructions, see:
https://www.x.org/wiki/Development/Documentation/SubmittingPatches
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: