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[WIN32K:NTUSER] ValidateHwndNoErr: Fix window handle validation (#4981)

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Also check window state. Addendum to 4d48b88b.
This commit is contained in:
Thamatip Chitpong 2023-01-22 21:44:52 +07:00 committed by GitHub
parent c0e7eaf403
commit 74c45e0975
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1 changed files with 10 additions and 2 deletions
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12
win32ss/user/ntuser/window.c
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@ -117,8 +117,16 @@ PWND FASTCALL VerifyWnd(PWND pWnd)
PWND FASTCALL ValidateHwndNoErr(HWND hWnd)
{
if (hWnd) return (PWND)UserGetObjectNoErr(gHandleTable, hWnd, TYPE_WINDOW);
return NULL;
PWND Window;
if (!hWnd)
return NULL;
Window = (PWND)UserGetObjectNoErr(gHandleTable, hWnd, TYPE_WINDOW);
if (!Window || (Window->state & WNDS_DESTROYED))
return NULL;
return Window;
}
/* Temp HACK */