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Description of problem:
When an animated cursor is moved between two monitor screens in X, X will crash.

Version-Release number of selected component (if applicable):
1.20.4-7

How reproducible: Consistently

Steps to Reproduce:
1. Compile the move_mouse.c file with "gcc -o move_mouse move_mouse.c -lX11".
2. Get an animated cursor to display; one option is to use Firefox with the attached waitcursor.html file.
3. Run the move_mouse program.

Actual results: X crashes.

Expected results: Cursor is moved to the other window and X continues to function.

Additional info:
- Customer sees this issue whenever multiple displays are present.
- Reproduced by the customer in both RHEL 7 and CentOS 7.

Created attachment 1697052 [details]
test C program from support case 02484099

Created attachment 1697053 [details]
HTML file to force busy-style animated cursor (can be used with Firefox)

Please try the test packages at:

https://people.redhat.com/~ajackson/1846652/

These were built against RHEL 7.9 but I believe they should be installable on
7.7, if that's what they're limited to.

I expect this build will avoid the crash. It _may_ replace the crash with
a situation where when an animated cursor crosses screens it will disappear or
stop animating until another cursor image change happens (be that implicitly when
crossing screens, or explicitly in response to an app request). In any event,
please test and report any changes, good or bad.

Patch has been tested and confirmed to fix the issue.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (xorg-x11-server bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2020:5049