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-rw-r--r--sot/source/sdstor/stgelem.cxx14
1 files changed, 11 insertions, 3 deletions
diff --git a/sot/source/sdstor/stgelem.cxx b/sot/source/sdstor/stgelem.cxx
index 7048e77061ca..c4a8c2881094 100644
--- a/sot/source/sdstor/stgelem.cxx
+++ b/sot/source/sdstor/stgelem.cxx
@@ -191,6 +191,14 @@ static bool lcl_wontoverflow(short shift)
return shift >= 0 && shift < (short)sizeof(short) * 8 - 1;
}
+static bool isKnownSpecial(sal_Int32 nLocation)
+{
+ return (nLocation == STG_FREE ||
+ nLocation == STG_EOF ||
+ nLocation == STG_FAT ||
+ nLocation == STG_MASTER);
+}
+
// Perform thorough checks also on unknown variables
sal_Bool StgHeader::Check()
{
@@ -202,8 +210,8 @@ sal_Bool StgHeader::Check()
&& nFATSize > 0
&& nTOCstrm >= 0
&& nThreshold > 0
- && ( nDataFAT == -2 || ( nDataFAT >= 0 && nDataFATSize > 0 ) )
- && ( nMasterChain == -2 || nMasterChain >=0 )
+ && ( isKnownSpecial(nDataFAT) || ( nDataFAT >= 0 && nDataFATSize > 0 ) )
+ && ( isKnownSpecial(nMasterChain) || nMasterChain >=0 )
&& nMaster >= 0;
}
@@ -397,7 +405,7 @@ sal_Bool StgEntry::Load( const void* pFrom, sal_uInt32 nBufSize )
if (n > nMaxLegalStr)
return sal_False;
- if ((nSize < 0 && cType != STG_STORAGE) || (nPage1 < 0 && nPage1 != -2))
+ if ((nSize < 0 && cType != STG_STORAGE) || (nPage1 < 0 && !isKnownSpecial(nPage1)))
{
// the size makes no sense for the substorage
// TODO/LATER: actually the size should be an unsigned value, but in this case it would mean a stream of more than 2Gb