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842cd7eb43
When creating a window with recordmydesktop running, the following may happen: create picture 0x1cd457e0, with drawable 0x1327d1f0 (SetWindowPixmap is called) destroy picture 0x1cd457e0, with drawable 0x1cd65820 Obtaining format for pixmap 0x1327d1f0 and picture 0x1cd457e0 ==7989== Invalid read of size 4 ==7989== at 0x8CAA0CA: glamor_get_tex_format_type_from_pixmap (glamor_utils.h:1252) ==7989== by 0x8CAD1B7: glamor_download_sub_pixmap_to_cpu (glamor_pixmap.c:1074) ==7989== by 0x8CA8BB7: _glamor_get_image (glamor_getimage.c:66) ==7989== by 0x8CA8D2F: glamor_get_image (glamor_getimage.c:92) ==7989== by 0x29AEF2: miSpriteGetImage (misprite.c:413) ==7989== by 0x1E7674: compGetImage (compinit.c:148) ==7989== by 0x1F5E5B: ProcShmGetImage (shm.c:684) ==7989== by 0x1F686F: ProcShmDispatch (shm.c:1121) ==7989== by 0x15D00D: Dispatch (dispatch.c:432) ==7989== by 0x14C569: main (main.c:298) ==7989== Address 0x1cd457f0 is 16 bytes inside a block of size 120 free'd ==7989== at 0x4C2B60C: free (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so) ==7989== by 0x228897: FreePicture (picture.c:1477) ==7989== by 0x228B23: PictureDestroyWindow (picture.c:73) ==7989== by 0x234C19: damageDestroyWindow (damage.c:1646) ==7989== by 0x1E92C0: compDestroyWindow (compwindow.c:590) ==7989== by 0x20FF85: DbeDestroyWindow (dbe.c:1389) ==7989== by 0x185D46: FreeWindowResources (window.c:907) ==7989== by 0x1889A7: DeleteWindow (window.c:975) ==7989== by 0x17EBF1: doFreeResource (resource.c:873) ==7989== by 0x17FC1B: FreeClientResources (resource.c:1139) ==7989== by 0x15C4DE: CloseDownClient (dispatch.c:3402) ==7989== by 0x2AB843: CheckConnections (connection.c:1008) ==7989== (II) fail to get matched format for dfdfdfdf The fix is to update the picture pointer when the window pixmap is changed, so it moves the picture around with the window rather than the pixmap. This makes FreePicture work correctly. Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=71088 Reviewed-by: Zhigang Gong <zhigang.gong@linux.intel.com>
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