xserver/hw
Peter Hutterer 5d7272f05d Allow disabling byte-swapped clients
The X server swapping code is a huge attack surface, much of this code
is untested and prone to security issues. The use-case of byte-swapped
clients is very niche, so allow users to disable this if they don't
need it, using either a config option or commandline flag.

For Xorg, this adds the ServerFlag "AllowByteSwappedClients" "off".
For all DDX, this adds the commandline options +byteswappedclients and
-byteswappedclients to enable or disable, respectively.

Fixes #1201
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
---
(cherry picked from commit 412777664a)
(cherry picked from commit af5cd5acc9012e527ee869f8e98bf6c2e9a02ca4)
Backport to server-21.1-branch modified to keep byte-swapping enabled
by default but easy to disable by users or admins (or even by distros
shipping an xorg.conf.d fragment in their packages).

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1440>
2024-03-23 14:42:15 -07:00
..
kdrive ephyr,xwayland: Use the proper private key for cursor 2024-01-16 10:00:37 +01:00
vfb mi: List extensions in usage message 2021-01-29 12:52:09 +00:00
xfree86 Allow disabling byte-swapped clients 2024-03-23 14:42:15 -07:00
xnest mi: List extensions in usage message 2021-01-29 12:52:09 +00:00
xquartz xquartz: Disable COMPOSITE at runtime 2023-01-17 15:19:10 -08:00
xwin mi: List extensions in usage message 2021-01-29 12:52:09 +00:00
Makefile.am Drop XWayland DDX 2021-09-15 21:49:17 +03:00
meson.build Drop XWayland DDX 2021-09-15 21:49:17 +03:00