hongao f0a679cfb2 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>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1553>

2026-03-16 13:16:39 +01:00

17 KiB

Raw Blame History

View Raw