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[WIN32K:NTUSER]

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- Probe parameters in NtUserGetLayeredWindowAttributes
- Don't call UserGetWindowObject without holding the user lock

svn path=/trunk/; revision=69182
This commit is contained in:
Thomas Faber 2015-09-11 07:31:06 +00:00
parent e88843426b
commit 953771f506
1 changed files with 24 additions and 13 deletions
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37
reactos/win32ss/user/ntuser/layered.c
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@ -224,15 +224,15 @@ NtUserGetLayeredWindowAttributes(
BOOL Ret = FALSE;
TRACE("Enter NtUserGetLayeredWindowAttributes\n");
UserEnterExclusive();
if (!(pWnd = UserGetWindowObject(hwnd)) ||
!(pWnd->ExStyle & WS_EX_LAYERED) )
{
return FALSE;
ERR("Not a Layered Window!\n");
goto Exit;
}
UserEnterExclusive();
pLrdProp = UserGetProp(pWnd, AtomLayer);
if (!pLrdProp)
@ -248,9 +248,21 @@ NtUserGetLayeredWindowAttributes(
_SEH2_TRY
{
if (pcrKey) *pcrKey = pLrdProp->Key;
if (pbAlpha) *pbAlpha = pLrdProp->Alpha;
if (pdwFlags) *pdwFlags = pLrdProp->Flags;
if (pcrKey)
{
ProbeForWrite(pcrKey, sizeof(*pcrKey), 1);
*pcrKey = pLrdProp->Key;
}
if (pbAlpha)
{
ProbeForWrite(pbAlpha, sizeof(*pbAlpha), 1);
*pbAlpha = pLrdProp->Alpha;
}
if (pdwFlags)
{
ProbeForWrite(pdwFlags, sizeof(*pdwFlags), 1);
*pdwFlags = pLrdProp->Flags;
}
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
@ -322,10 +334,11 @@ NtUserUpdateLayeredWindow(
BOOL Ret = FALSE;
TRACE("Enter NtUserUpdateLayeredWindow\n");
UserEnterExclusive();
if (!(pWnd = UserGetWindowObject(hwnd)))
{
return FALSE;
goto Exit;
}
_SEH2_TRY
@ -356,12 +369,10 @@ NtUserUpdateLayeredWindow(
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
EngSetLastError( ERROR_INVALID_PARAMETER );
_SEH2_YIELD(return FALSE);
_SEH2_YIELD(goto Exit);
}
_SEH2_END;
UserEnterExclusive();
if ( GetLayeredStatus(pWnd) ||
dwFlags & ~(ULW_COLORKEY | ULW_ALPHA | ULW_OPAQUE | ULW_EX_NORESIZE) ||
!(pWnd->ExStyle & WS_EX_LAYERED) )
@ -373,14 +384,14 @@ NtUserUpdateLayeredWindow(
info.cbSize = sizeof(info);
info.hdcDst = hdcDst;
info.pptDst = pptDst? &Dst : 0;
info.pptDst = pptDst? &Dst : NULL;
info.psize = &Size;
info.hdcSrc = hdcSrc;
info.pptSrc = pptSrc ? &Src : 0;
info.pptSrc = pptSrc ? &Src : NULL;
info.crKey = crKey;
info.pblend = &blend;
info.dwFlags = dwFlags;
info.prcDirty = prcDirty ? &Dirty : 0;
info.prcDirty = prcDirty ? &Dirty : NULL;
Ret = IntUpdateLayeredWindowI( pWnd, &info );
Exit:
TRACE("Leave NtUserUpdateLayeredWindow, ret=%i\n", Ret);