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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
..
Makefile.am man/Makefile.am: Fix Xorg.wrap.man Xwrapper.config.man missing from make dist 2014-04-18 16:37:22 +02:00
Xorg.man Update URL's in man pages 2020-05-10 17:46:33 -07:00
Xorg.wrap.man man: s/__/@/g 2018-03-27 10:13:17 -04:00
Xwrapper.config.man man: s/__/@/g 2018-03-27 10:13:17 -04:00
xorg.conf.d.man man: s/__/@/g 2018-03-27 10:13:17 -04:00
xorg.conf.man Allow disabling byte-swapped clients 2024-03-23 14:42:15 -07:00