do not access uninitialized values when printing (tdf#121439)
The assert in the bugreport is triggered by ScPrintFunc::CalcPages() passing
uninitialized values of nEndRow (and others). These variables apparently
get initialized only by constructors that take ScPrintState. These ctors
also set (the somewhat poorly named) bState and the call to CalcPages()
is guarded by this. However, GetPrintState() will simply create ScPrintState
filled with these uninitialized values and later on this will be used
with these ctors, so bState will be set, but nEndRow will be bogus.
Although 5217a2a0bf27e496cc429ee45dff7c239b466ae6 introduced tdf#121439,
this strange bState logic and unitialized variables has been these since
the initial commit, and the code doesn't take any precautions to check
whether the values are valid or not, so I assume this always was just lucky
enough to work and 5217a2a0bf finally triggered a problem.
Given that it's rather unclear to me how this is supposed to work properly,
just add an extra flag to both ScPrintFunc and ScPrintState marking whether
the values are set or not and make CalcPages() depends on this flag instead.
Change-Id: I0620de6562865c24f5a0edca2566b01546bf2e2b
Reviewed-on: https://gerrit.libreoffice.org/68739
Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>
Tested-by: Jenkins
(cherry picked from commit 9432bab9f8f4a246d205ff2a460f60aeedba8ce1)
Reviewed-on: https://gerrit.libreoffice.org/69261
Reviewed-by: Xisco Faulí <xiscofauli@libreoffice.org>
diff --git a/sc/source/ui/inc/printfun.hxx b/sc/source/ui/inc/printfun.hxx
index 7115b7f..7184e6e 100644
--- a/sc/source/ui/inc/printfun.hxx
+++ b/sc/source/ui/inc/printfun.hxx
@@ -150,6 +150,7 @@
SCROW nStartRow;
SCCOL nEndCol;
SCROW nEndRow;
bool bPrintAreaValid; // the 4 variables above are set
sal_uInt16 nZoom;
size_t nPagesX;
size_t nPagesY;
@@ -172,6 +173,7 @@
, nStartRow(0)
, nEndCol(0)
, nEndRow(0)
, bPrintAreaValid(false)
, nZoom(0)
, nPagesX(0)
, nPagesY(0)
@@ -209,7 +211,7 @@
const ScRange* pUserArea; // Selection, if set in dialog
const SfxItemSet* pParamSet; // Selected template
bool bState; // created from State-struct
bool bFromPrintState; // created from State-struct
// Parameter from template:
sal_uInt16 nLeftMargin;
@@ -258,6 +260,7 @@
SCROW nStartRow;
SCCOL nEndCol;
SCROW nEndRow;
bool bPrintAreaValid; // the 4 variables above are set
sc::PrintPageRanges m_aRanges;
diff --git a/sc/source/ui/view/printfun.cxx b/sc/source/ui/view/printfun.cxx
index 42cb2fb..8b6e4d5 100644
--- a/sc/source/ui/view/printfun.cxx
+++ b/sc/source/ui/view/printfun.cxx
@@ -191,7 +191,7 @@
pParamSet = nullptr;
}
if (!bState)
if (!bFromPrintState)
nZoom = 100;
nManualZoom = 100;
bClearWin = false;
@@ -214,13 +214,14 @@
nPageStart ( nPage ),
nDocPages ( nDocP ),
pUserArea ( pArea ),
bState ( false ),
bFromPrintState ( false ),
bSourceRangeValid ( false ),
bPrintCurrentTable ( false ),
bMultiArea ( false ),
mbHasPrintRange(true),
nTabPages ( 0 ),
nTotalPages ( 0 ),
bPrintAreaValid ( false ),
pPageData ( pData )
{
pDev = pPrinter.get();
@@ -247,6 +248,7 @@
nStartRow = rState.nStartRow;
nEndCol = rState.nEndCol;
nEndRow = rState.nEndRow;
bPrintAreaValid = rState.bPrintAreaValid;
nZoom = rState.nZoom;
m_aRanges.m_nPagesX = rState.nPagesX;
m_aRanges.m_nPagesY = rState.nPagesY;
@@ -254,7 +256,7 @@
nTotalPages = rState.nTotalPages;
nPageStart = rState.nPageStart;
nDocPages = rState.nDocPages;
bState = true;
bFromPrintState = true;
if (rState.bSavedStateRanges)
{
@@ -279,13 +281,14 @@
nPageStart ( nPage ),
nDocPages ( nDocP ),
pUserArea ( pArea ),
bState ( false ),
bFromPrintState ( false ),
bSourceRangeValid ( false ),
bPrintCurrentTable ( false ),
bMultiArea ( false ),
mbHasPrintRange(true),
nTabPages ( 0 ),
nTotalPages ( 0 ),
bPrintAreaValid ( false ),
pPageData ( nullptr )
{
pDev = pOutDev;
@@ -311,6 +314,7 @@
nStartRow = rState.nStartRow;
nEndCol = rState.nEndCol;
nEndRow = rState.nEndRow;
bPrintAreaValid = rState.bPrintAreaValid;
nZoom = rState.nZoom;
m_aRanges.m_nPagesX = rState.nPagesX;
m_aRanges.m_nPagesY = rState.nPagesY;
@@ -318,7 +322,7 @@
nTotalPages = rState.nTotalPages;
nPageStart = rState.nPageStart;
nDocPages = rState.nDocPages;
bState = true;
bFromPrintState = true;
if (rState.bSavedStateRanges)
{
@@ -339,6 +343,7 @@
rState.nStartRow = nStartRow;
rState.nEndCol = nEndCol;
rState.nEndRow = nEndRow;
rState.bPrintAreaValid = bPrintAreaValid;
rState.nZoom = nZoom;
rState.nPagesX = m_aRanges.m_nPagesX;
rState.nPagesY = m_aRanges.m_nPagesY;
@@ -370,6 +375,7 @@
sal_uInt16 nCount = sal::static_int_cast<sal_uInt16>( pPageData->GetCount() );
ScPrintRangeData& rData = pPageData->GetData(nCount); // count up
assert( bPrintAreaValid );
rData.SetPrintRange( ScRange( nStartCol, nStartRow, nPrintTab,
nEndCol, nEndRow, nPrintTab ) );
// #i123672#
@@ -696,6 +702,7 @@
nStartRow = 0;
if (!pDoc->GetPrintArea( nPrintTab, nEndCol, nEndRow, bNotes ))
return false; // nothing
bPrintAreaValid = true;
}
else
{
@@ -734,10 +741,12 @@
if (!bFound)
return false; // empty
bPrintAreaValid = true;
if (bForcedChangeRow)
bChangeRow = true;
}
assert( bPrintAreaValid );
pDoc->ExtendMerge( nStartCol,nStartRow, nEndCol,nEndRow, nPrintTab ); // no Refresh, incl. Attrs
if ( bChangeCol )
@@ -1057,7 +1066,7 @@
// Split pages
if (!bState)
if (!bPrintAreaValid)
{
nTabPages = CountPages(); // also calculates zoom
nTotalPages = nTabPages;
@@ -2544,6 +2553,7 @@
if (bDoThis)
{
assert( bPrintAreaValid );
for ( SCCOL nCol = nStartCol; nCol <= nEndCol; ++nCol )
{
if (pDoc->HasColNotes(nCol, nPrintTab))
@@ -3003,6 +3013,7 @@
void ScPrintFunc::CalcPages() // calculates aPageRect and pages from nZoom
{
assert( bPrintAreaValid );
m_aRanges.calculate(pDoc, aTableParam.bSkipEmpty, aAreaParam.bPrintArea, nStartRow, nEndRow, nStartCol, nEndCol, nPrintTab, GetDocPageSize());
}
