xserver/randr
hongao ce300ed2bc randr: clear primary screen's primaryOutput when the output is deleted
This fix use after free when a pluggable gpu screen (such as displaylink)
was set as primary screen and unpluged.

gdb backtrace:
 #0 OssigHandler (signo=11, sip=0x7fff2e0a50f0, unused=0x7fff2e0a4fc0) at ../../../../os/osinit.c:138
 #1 <signal handler called>
 #2 rrGetscreenResources (client=0x3195160, query=0) at ../../../../randr/rrscreen.c:577
 #3 0x0000000000562bae in ProcRRGetscreenResourcesCurrent (client=0x3195160) at ../../../../randr/rrscreen.c:652
 #4 OxOOOOB0000054de63 in ProcRRDispatch (client=0x3195160) at ../../../../randr/randr.c:717
 #5 0x00000000004322c6 in Dispatch () at ../../../../dix/dispatch.c:485
 #6 0x0900900990443139 in dix_main (argc=12, argv=0x7fff2e0a5f78, envp=0x7fff2e0a5fe0) at ../../../../dix/main.c:276
 #7 0X0000000000421d9a in main (argc=12, argv=0x7fff2e0a5f78, envp=0x7fff2e0a5fe0) at ../../../../dix/stubmain.c:34

Signed-off-by: hongao <hongao@uniontech.com>
(cherry picked from commit 1443fd34ea)

Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/2146>
2026-03-28 16:39:59 +00:00
..
Makefile.am Add RandR leases with modesetting driver support [v6] 2018-02-27 12:39:50 -05:00
meson.build meson: hide C API if Xorg is disabled (like autotools) 2021-03-11 00:22:36 +00:00
randr.c present: fallback get_crtc to return crtc belonging to screen with present extension 2021-07-20 08:10:46 +02:00
randrstr.h present: fallback get_crtc to return crtc belonging to screen with present extension 2021-07-20 08:10:46 +02:00
rrcrtc.c present: fix msc offset calculation in screen mode 2021-04-16 10:53:43 +00:00
rrdispatch.c Add RandR leases with modesetting driver support [v6] 2018-02-27 12:39:50 -05:00
rrinfo.c Convert top level extensions to new *allocarray functions 2015-04-21 16:57:08 -07:00
rrlease.c Fix RandR leasing for more than 1 simultaneously active lease. 2021-10-21 13:08:01 +03:00
rrmode.c Add RandR leases with modesetting driver support [v6] 2018-02-27 12:39:50 -05:00
rrmonitor.c Removing the code that deletes an existing monitor in RRMonitorAdd 2024-01-03 08:42:34 +01:00
rroutput.c randr: clear primary screen's primaryOutput when the output is deleted 2026-03-28 16:39:59 +00:00
rrpointer.c randr: Fix logic in RRPointerToNearestCrtc 2014-07-30 14:40:17 -07:00
rrproperty.c randr: avoid integer truncation in length check of ProcRRChange*Property 2023-12-13 11:00:13 +10:00
rrprovider.c present: fix msc offset calculation in screen mode 2021-04-16 10:53:43 +00:00
rrproviderproperty.c randr: Check for overflow in RRChangeProviderProperty() 2025-06-17 15:06:40 +02:00
rrscreen.c xserver/output: rename some badly named variables/APIs. 2020-07-10 06:17:44 +10:00
rrsdispatch.c Add RandR leases with modesetting driver support [v6] 2018-02-27 12:39:50 -05:00
rrtransform.c randr: Silence -Wshift-negative-value warnings 2015-10-19 11:51:52 -04:00
rrtransform.h Drop trailing whitespaces 2014-11-12 10:25:00 +10:00
rrxinerama.c dispatch: Mark swapped dispatch as _X_COLD 2017-03-01 10:16:20 -05:00