219c54b8a3
The previous code only made sense if one considers buttons and keys to be mutually exclusive on a device. That is not necessarily true, causing a number of issues. This function allocates and fills in the number of xEvents we need to send the device state down the wire. This is split across multiple 32-byte devices including one deviceStateNotify event and optional deviceKeyStateNotify, deviceButtonStateNotify and (possibly multiple) deviceValuator events. The previous behavior would instead compose a sequence of [state, buttonstate, state, keystate, valuator...]. This is not protocol correct, and on top of that made the code extremely convoluted. Fix this by streamlining: add both button and key into the deviceStateNotify and then append the key state and button state, followed by the valuators. Finally, the deviceValuator events contain up to 6 valuators per event but we only ever sent through 3 at a time. Let's double that troughput. CVE-2024-0229, ZDI-CAN-22678 This vulnerability was discovered by: Jan-Niklas Sohn working with Trend Micro Zero Day Initiative |
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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 primary 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: