win32u: Avoid SEGV in QueryDisplayConfig when run as service.

The virtual_monitor used for non-interactive service executions do not have an adapter set. Avoid segfaulting and poisoning the mutex in such cases.

win32u: Avoid SEGV in QueryDisplayConfig when run as service.
9d255d6d · Tatsuyuki Ishi · Alexandre Julliard · 81859c9a · 9d255d6d
Commit 9d255d6d authored Jun 22, 2023 by Tatsuyuki Ishi Committed by Alexandre Julliard Jun 22, 2023
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sysparams.c dlls/win32u/sysparams.c +3 -0

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--- a/dlls/win32u/sysparams.c
+++ b/dlls/win32u/sysparams.c
@@ -2569,6 +2569,9 @@ LONG WINAPI NtUserQueryDisplayConfig( UINT32 flags, UINT32 *paths_count, DISPLAY
        if (!(monitor->dev.state_flags & DISPLAY_DEVICE_ACTIVE))
            continue;

+        if (!monitor->adapter)
+            continue;
+
        adapter_index = monitor->adapter->id;
        gpu_luid = &monitor->adapter->gpu_luid;
        output_id = monitor->output_id;