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[WIN32K]

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Fix possible NULL pointer dereference. Spotted by Amine Khaldi.

svn path=/trunk/; revision=49303
This commit is contained in:
Timo Kreuzer 2010-10-27 12:51:32 +00:00
parent 58781041d7
commit 08810169e7
1 changed files with 9 additions and 5 deletions
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14
reactos/subsystems/win32/win32k/ntuser/event.c
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@ -299,17 +299,21 @@ NtUserNotifyWinEvent(
UserEnterExclusive(); UserEnterExclusive();
/* Validate input */ /* Validate input */
if (hWnd && (hWnd != INVALID_HANDLE_VALUE) && !(Window = UserGetWindowObject(hWnd))) if (hWnd && (hWnd != INVALID_HANDLE_VALUE))
{ {
UserLeave(); Window = UserGetWindowObject(hWnd);
return; if (!Window)
{
UserLeave();
return;
}
} }
if (gpsi->dwInstalledEventHooks & GetMaskFromEvent(Event)) if (gpsi->dwInstalledEventHooks & GetMaskFromEvent(Event))
{ {
UserRefObjectCo(Window, &Ref); if (Window) UserRefObjectCo(Window, &Ref);
IntNotifyWinEvent( Event, Window, idObject, idChild, WEF_SETBYWNDPTI); IntNotifyWinEvent( Event, Window, idObject, idChild, WEF_SETBYWNDPTI);
UserDerefObjectCo(Window); if (Window) UserDerefObjectCo(Window);
} }
UserLeave(); UserLeave();
} }